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> | |
0bb7724a | 23 | #include <paths.h> |
fac6795d DG |
24 | #include <pthread.h> |
25 | #include <signal.h> | |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
331744e3 | 29 | #include <inttypes.h> |
0fdd1e2c | 30 | #include <sys/mman.h> |
b73401da | 31 | #include <sys/mount.h> |
1e307fab | 32 | #include <sys/resource.h> |
fac6795d DG |
33 | #include <sys/socket.h> |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
0fdd1e2c | 36 | #include <sys/wait.h> |
5c827ce0 | 37 | #include <urcu/uatomic.h> |
fac6795d | 38 | #include <unistd.h> |
3bd1e081 | 39 | #include <config.h> |
fac6795d | 40 | |
990570ed | 41 | #include <common/common.h> |
d27c42b8 | 42 | #include <common/compat/socket.h> |
db758600 DG |
43 | #include <common/defaults.h> |
44 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 45 | #include <common/futex.h> |
00e2e675 | 46 | #include <common/relayd/relayd.h> |
81b86775 | 47 | #include <common/utils.h> |
fac6795d | 48 | |
10a8a223 | 49 | #include "lttng-sessiond.h" |
7972aab2 | 50 | #include "buffer-registry.h" |
54d01ffb | 51 | #include "channel.h" |
2f77fc4b | 52 | #include "cmd.h" |
00e2e675 | 53 | #include "consumer.h" |
099e26bd | 54 | #include "context.h" |
54d01ffb | 55 | #include "event.h" |
4771f025 | 56 | #include "kernel.h" |
f1e16794 | 57 | #include "kernel-consumer.h" |
096102bd | 58 | #include "modprobe.h" |
0fdd1e2c | 59 | #include "shm.h" |
1e307fab | 60 | #include "ust-ctl.h" |
00e2e675 | 61 | #include "ust-consumer.h" |
8e68d1c8 | 62 | #include "utils.h" |
4063050c | 63 | #include "fd-limit.h" |
8782cc74 | 64 | #include "health-sessiond.h" |
8ac94142 | 65 | #include "testpoint.h" |
d0b96690 | 66 | #include "ust-thread.h" |
4d076222 | 67 | #include "jul-thread.h" |
fac6795d | 68 | |
ebaeda94 MD |
69 | #define CONSUMERD_FILE "lttng-consumerd" |
70 | ||
fac6795d | 71 | const char *progname; |
6c71277b | 72 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
35f90c40 | 73 | static const char *opt_pidfile; |
5b8719f5 | 74 | static int opt_sig_parent; |
97e19046 | 75 | static int opt_verbose_consumer; |
fac6795d | 76 | static int opt_daemon; |
4fba7219 | 77 | static int opt_no_kernel; |
fac6795d | 78 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 79 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 80 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 81 | static char *rundir; |
3bd1e081 | 82 | |
0bb7724a DG |
83 | /* Set to 1 when a SIGUSR1 signal is received. */ |
84 | static int recv_child_signal; | |
85 | ||
a23ec3a7 DG |
86 | /* |
87 | * Consumer daemon specific control data. Every value not initialized here is | |
88 | * set to 0 by the static definition. | |
89 | */ | |
3bd1e081 MD |
90 | static struct consumer_data kconsumer_data = { |
91 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
92 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
93 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
94 | .err_sock = -1, |
95 | .cmd_sock = -1, | |
173af62f DG |
96 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
97 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
98 | .cond = PTHREAD_COND_INITIALIZER, |
99 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 100 | }; |
7753dea8 MD |
101 | static struct consumer_data ustconsumer64_data = { |
102 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
103 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
104 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
105 | .err_sock = -1, |
106 | .cmd_sock = -1, | |
173af62f DG |
107 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
108 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
109 | .cond = PTHREAD_COND_INITIALIZER, |
110 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
111 | }; |
112 | static struct consumer_data ustconsumer32_data = { | |
113 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
114 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
115 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
116 | .err_sock = -1, |
117 | .cmd_sock = -1, | |
173af62f DG |
118 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
119 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
120 | .cond = PTHREAD_COND_INITIALIZER, |
121 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
122 | }; |
123 | ||
26c9d55e | 124 | /* Shared between threads */ |
099e26bd | 125 | static int dispatch_thread_exit; |
fac6795d | 126 | |
54d01ffb DG |
127 | /* Global application Unix socket path */ |
128 | static char apps_unix_sock_path[PATH_MAX]; | |
129 | /* Global client Unix socket path */ | |
130 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
131 | /* global wait shm path for UST */ |
132 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
133 | /* Global health check unix path */ |
134 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 135 | |
1d4b027a | 136 | /* Sockets and FDs */ |
a4b35e07 MD |
137 | static int client_sock = -1; |
138 | static int apps_sock = -1; | |
2f77fc4b | 139 | int kernel_tracer_fd = -1; |
76d7553f | 140 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 141 | |
273ea72c DG |
142 | /* |
143 | * Quit pipe for all threads. This permits a single cancellation point | |
144 | * for all threads when receiving an event on the pipe. | |
145 | */ | |
76d7553f | 146 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 147 | |
099e26bd DG |
148 | /* |
149 | * This pipe is used to inform the thread managing application communication | |
150 | * that a command is queued and ready to be processed. | |
151 | */ | |
76d7553f | 152 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 153 | |
d0b96690 DG |
154 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
155 | ||
1d4b027a | 156 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 157 | static pthread_t apps_thread; |
d0b96690 | 158 | static pthread_t apps_notify_thread; |
099e26bd | 159 | static pthread_t reg_apps_thread; |
1d4b027a | 160 | static pthread_t client_thread; |
7a485870 | 161 | static pthread_t kernel_thread; |
099e26bd | 162 | static pthread_t dispatch_thread; |
44a5e5eb | 163 | static pthread_t health_thread; |
0b2dc8df | 164 | static pthread_t ht_cleanup_thread; |
4d076222 | 165 | static pthread_t jul_reg_thread; |
5eb91c98 | 166 | |
099e26bd DG |
167 | /* |
168 | * UST registration command queue. This queue is tied with a futex and uses a N | |
169 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
170 | * | |
171 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
172 | * this queue and the wait/wake scheme. | |
173 | */ | |
174 | static struct ust_cmd_queue ust_cmd_queue; | |
175 | ||
b5541356 DG |
176 | /* |
177 | * Pointer initialized before thread creation. | |
178 | * | |
179 | * This points to the tracing session list containing the session count and a | |
180 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
181 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 182 | * |
d063d709 | 183 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 184 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
185 | */ |
186 | static struct ltt_session_list *session_list_ptr; | |
187 | ||
7753dea8 MD |
188 | int ust_consumerd64_fd = -1; |
189 | int ust_consumerd32_fd = -1; | |
190 | ||
fb6f1fa2 YB |
191 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
192 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
193 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
194 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 195 | |
2f77fc4b DG |
196 | static const char *module_proc_lttng = "/proc/lttng"; |
197 | ||
5c827ce0 DG |
198 | /* |
199 | * Consumer daemon state which is changed when spawning it, killing it or in | |
200 | * case of a fatal error. | |
201 | */ | |
202 | enum consumerd_state { | |
203 | CONSUMER_STARTED = 1, | |
204 | CONSUMER_STOPPED = 2, | |
205 | CONSUMER_ERROR = 3, | |
206 | }; | |
207 | ||
208 | /* | |
209 | * This consumer daemon state is used to validate if a client command will be | |
210 | * able to reach the consumer. If not, the client is informed. For instance, | |
211 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
212 | * error to the client. | |
213 | * | |
214 | * The following example shows a possible race condition of this scheme: | |
215 | * | |
216 | * consumer thread error happens | |
217 | * client cmd arrives | |
218 | * client cmd checks state -> still OK | |
219 | * consumer thread exit, sets error | |
220 | * client cmd try to talk to consumer | |
221 | * ... | |
222 | * | |
223 | * However, since the consumer is a different daemon, we have no way of making | |
224 | * sure the command will reach it safely even with this state flag. This is why | |
225 | * we consider that up to the state validation during command processing, the | |
226 | * command is safe. After that, we can not guarantee the correctness of the | |
227 | * client request vis-a-vis the consumer. | |
228 | */ | |
229 | static enum consumerd_state ust_consumerd_state; | |
230 | static enum consumerd_state kernel_consumerd_state; | |
231 | ||
ae9e45b3 DG |
232 | /* |
233 | * Socket timeout for receiving and sending in seconds. | |
234 | */ | |
235 | static int app_socket_timeout; | |
236 | ||
12744796 DG |
237 | /* Set in main() with the current page size. */ |
238 | long page_size; | |
239 | ||
8782cc74 MD |
240 | /* Application health monitoring */ |
241 | struct health_app *health_sessiond; | |
242 | ||
4d076222 DG |
243 | /* JUL TCP port for registration. Used by the JUL thread. */ |
244 | unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT; | |
245 | ||
fb09408a | 246 | static |
7753dea8 | 247 | void setup_consumerd_path(void) |
fb09408a | 248 | { |
fc7a59ce | 249 | const char *bin, *libdir; |
fb09408a | 250 | |
7753dea8 MD |
251 | /* |
252 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
253 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
254 | * has not been defined. | |
7753dea8 | 255 | */ |
ebaeda94 | 256 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
257 | if (!consumerd32_bin[0]) { |
258 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
259 | } |
260 | if (!consumerd32_libdir[0]) { | |
261 | consumerd32_libdir = INSTALL_LIB_PATH; | |
262 | } | |
263 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
264 | if (!consumerd64_bin[0]) { |
265 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 266 | } |
ebaeda94 MD |
267 | if (!consumerd64_libdir[0]) { |
268 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
269 | } |
270 | #else | |
271 | #error "Unknown bitness" | |
272 | #endif | |
273 | ||
fb09408a MD |
274 | /* |
275 | * runtime env. var. overrides the build default. | |
276 | */ | |
fc7a59ce AM |
277 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
278 | if (bin) { | |
279 | consumerd32_bin = bin; | |
7753dea8 | 280 | } |
fc7a59ce AM |
281 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
282 | if (bin) { | |
283 | consumerd64_bin = bin; | |
ebaeda94 | 284 | } |
72f579ee | 285 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
286 | if (libdir) { |
287 | consumerd32_libdir = libdir; | |
288 | } | |
72f579ee | 289 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
290 | if (libdir) { |
291 | consumerd64_libdir = libdir; | |
fb09408a MD |
292 | } |
293 | } | |
294 | ||
5eb91c98 DG |
295 | /* |
296 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
297 | */ | |
d0b96690 | 298 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
299 | { |
300 | int ret; | |
301 | ||
d0b96690 | 302 | assert(events); |
5eb91c98 DG |
303 | |
304 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
305 | if (ret < 0) { | |
306 | goto error; | |
307 | } | |
308 | ||
309 | /* Add quit pipe */ | |
d0b96690 | 310 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
311 | if (ret < 0) { |
312 | goto error; | |
313 | } | |
314 | ||
315 | return 0; | |
316 | ||
317 | error: | |
318 | return ret; | |
319 | } | |
320 | ||
321 | /* | |
322 | * Check if the thread quit pipe was triggered. | |
323 | * | |
324 | * Return 1 if it was triggered else 0; | |
325 | */ | |
d0b96690 | 326 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
327 | { |
328 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
329 | return 1; | |
330 | } | |
331 | ||
332 | return 0; | |
333 | } | |
334 | ||
273ea72c | 335 | /* |
5eb91c98 | 336 | * Init thread quit pipe. |
273ea72c DG |
337 | * |
338 | * Return -1 on error or 0 if all pipes are created. | |
339 | */ | |
340 | static int init_thread_quit_pipe(void) | |
341 | { | |
730389d9 | 342 | int ret, i; |
273ea72c | 343 | |
730389d9 | 344 | ret = pipe(thread_quit_pipe); |
273ea72c | 345 | if (ret < 0) { |
730389d9 | 346 | PERROR("thread quit pipe"); |
273ea72c DG |
347 | goto error; |
348 | } | |
349 | ||
730389d9 DG |
350 | for (i = 0; i < 2; i++) { |
351 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
352 | if (ret < 0) { | |
353 | PERROR("fcntl"); | |
354 | goto error; | |
355 | } | |
356 | } | |
357 | ||
273ea72c DG |
358 | error: |
359 | return ret; | |
360 | } | |
361 | ||
099e26bd DG |
362 | /* |
363 | * Stop all threads by closing the thread quit pipe. | |
364 | */ | |
cf3af59e MD |
365 | static void stop_threads(void) |
366 | { | |
5eb91c98 DG |
367 | int ret; |
368 | ||
cf3af59e MD |
369 | /* Stopping all threads */ |
370 | DBG("Terminating all threads"); | |
54d01ffb | 371 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
372 | if (ret < 0) { |
373 | ERR("write error on thread quit pipe"); | |
374 | } | |
375 | ||
099e26bd | 376 | /* Dispatch thread */ |
26c9d55e | 377 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 378 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
379 | } |
380 | ||
e975f9f8 DG |
381 | /* |
382 | * Close every consumer sockets. | |
383 | */ | |
384 | static void close_consumer_sockets(void) | |
385 | { | |
386 | int ret; | |
387 | ||
388 | if (kconsumer_data.err_sock >= 0) { | |
389 | ret = close(kconsumer_data.err_sock); | |
390 | if (ret < 0) { | |
391 | PERROR("kernel consumer err_sock close"); | |
392 | } | |
393 | } | |
394 | if (ustconsumer32_data.err_sock >= 0) { | |
395 | ret = close(ustconsumer32_data.err_sock); | |
396 | if (ret < 0) { | |
a76cbd9f | 397 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
398 | } |
399 | } | |
400 | if (ustconsumer64_data.err_sock >= 0) { | |
401 | ret = close(ustconsumer64_data.err_sock); | |
402 | if (ret < 0) { | |
a76cbd9f | 403 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
404 | } |
405 | } | |
406 | if (kconsumer_data.cmd_sock >= 0) { | |
407 | ret = close(kconsumer_data.cmd_sock); | |
408 | if (ret < 0) { | |
409 | PERROR("kernel consumer cmd_sock close"); | |
410 | } | |
411 | } | |
412 | if (ustconsumer32_data.cmd_sock >= 0) { | |
413 | ret = close(ustconsumer32_data.cmd_sock); | |
414 | if (ret < 0) { | |
a76cbd9f | 415 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
416 | } |
417 | } | |
418 | if (ustconsumer64_data.cmd_sock >= 0) { | |
419 | ret = close(ustconsumer64_data.cmd_sock); | |
420 | if (ret < 0) { | |
a76cbd9f | 421 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
422 | } |
423 | } | |
424 | } | |
425 | ||
fac6795d | 426 | /* |
d063d709 | 427 | * Cleanup the daemon |
fac6795d | 428 | */ |
cf3af59e | 429 | static void cleanup(void) |
fac6795d | 430 | { |
ef599319 | 431 | int ret; |
af9737e9 | 432 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 433 | char path[PATH_MAX]; |
fac6795d | 434 | |
1d4b027a | 435 | DBG("Cleaning up"); |
e07ae692 | 436 | |
4e449f3f MD |
437 | /* |
438 | * Close the thread quit pipe. It has already done its job, | |
439 | * since we are now called. | |
440 | */ | |
2f77fc4b DG |
441 | utils_close_pipe(thread_quit_pipe); |
442 | ||
35f90c40 DG |
443 | /* |
444 | * If opt_pidfile is undefined, the default file will be wiped when | |
445 | * removing the rundir. | |
446 | */ | |
447 | if (opt_pidfile) { | |
448 | ret = remove(opt_pidfile); | |
449 | if (ret < 0) { | |
450 | PERROR("remove pidfile %s", opt_pidfile); | |
451 | } | |
452 | } | |
453 | ||
8c6c56c2 MD |
454 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
455 | ||
456 | /* sessiond */ | |
457 | snprintf(path, PATH_MAX, | |
458 | "%s/%s", | |
459 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
460 | DBG("Removing %s", path); | |
461 | (void) unlink(path); | |
462 | ||
cd9290dd DG |
463 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
464 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE); | |
465 | DBG("Removing %s", path); | |
466 | (void) unlink(path); | |
467 | ||
8c6c56c2 MD |
468 | /* kconsumerd */ |
469 | snprintf(path, PATH_MAX, | |
470 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
471 | rundir); | |
472 | DBG("Removing %s", path); | |
473 | (void) unlink(path); | |
474 | ||
475 | snprintf(path, PATH_MAX, | |
476 | DEFAULT_KCONSUMERD_PATH, | |
477 | rundir); | |
478 | DBG("Removing directory %s", path); | |
479 | (void) rmdir(path); | |
480 | ||
481 | /* ust consumerd 32 */ | |
482 | snprintf(path, PATH_MAX, | |
483 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
484 | rundir); | |
485 | DBG("Removing %s", path); | |
486 | (void) unlink(path); | |
487 | ||
488 | snprintf(path, PATH_MAX, | |
489 | DEFAULT_USTCONSUMERD32_PATH, | |
490 | rundir); | |
491 | DBG("Removing directory %s", path); | |
492 | (void) rmdir(path); | |
493 | ||
494 | /* ust consumerd 64 */ | |
495 | snprintf(path, PATH_MAX, | |
496 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
497 | rundir); | |
498 | DBG("Removing %s", path); | |
499 | (void) unlink(path); | |
500 | ||
501 | snprintf(path, PATH_MAX, | |
502 | DEFAULT_USTCONSUMERD64_PATH, | |
503 | rundir); | |
504 | DBG("Removing directory %s", path); | |
505 | (void) rmdir(path); | |
5461b305 | 506 | |
dcbcae3e MD |
507 | /* |
508 | * We do NOT rmdir rundir because there are other processes | |
509 | * using it, for instance lttng-relayd, which can start in | |
510 | * parallel with this teardown. | |
511 | */ | |
512 | ||
bd69add2 | 513 | free(rundir); |
5461b305 | 514 | |
99bab54f | 515 | DBG("Cleaning up all sessions"); |
fac6795d | 516 | |
b5541356 | 517 | /* Destroy session list mutex */ |
273ea72c DG |
518 | if (session_list_ptr != NULL) { |
519 | pthread_mutex_destroy(&session_list_ptr->lock); | |
520 | ||
521 | /* Cleanup ALL session */ | |
54d01ffb DG |
522 | cds_list_for_each_entry_safe(sess, stmp, |
523 | &session_list_ptr->head, list) { | |
2f77fc4b | 524 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
525 | } |
526 | } | |
527 | ||
099e26bd | 528 | DBG("Closing all UST sockets"); |
56fff090 | 529 | ust_app_clean_list(); |
7972aab2 | 530 | buffer_reg_destroy_registries(); |
099e26bd | 531 | |
4fba7219 DG |
532 | if (is_root && !opt_no_kernel) { |
533 | DBG2("Closing kernel fd"); | |
a4b35e07 | 534 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
535 | ret = close(kernel_tracer_fd); |
536 | if (ret) { | |
537 | PERROR("close"); | |
538 | } | |
a4b35e07 | 539 | } |
2f50c8a3 | 540 | DBG("Unloading kernel modules"); |
096102bd | 541 | modprobe_remove_lttng_all(); |
2f50c8a3 | 542 | } |
2f77fc4b | 543 | |
e975f9f8 DG |
544 | close_consumer_sockets(); |
545 | ||
421cb601 | 546 | /* <fun> */ |
f56a39af | 547 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
548 | "Matthew, BEET driven development works!%c[%dm", |
549 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
550 | /* </fun> */ | |
fac6795d DG |
551 | } |
552 | ||
e065084a | 553 | /* |
d063d709 | 554 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 555 | * |
d063d709 | 556 | * Return lttcomm error code. |
e065084a DG |
557 | */ |
558 | static int send_unix_sock(int sock, void *buf, size_t len) | |
559 | { | |
560 | /* Check valid length */ | |
c617c0c6 | 561 | if (len == 0) { |
e065084a DG |
562 | return -1; |
563 | } | |
564 | ||
565 | return lttcomm_send_unix_sock(sock, buf, len); | |
566 | } | |
567 | ||
5461b305 | 568 | /* |
d063d709 | 569 | * Free memory of a command context structure. |
5461b305 | 570 | */ |
a2fb29a5 | 571 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 572 | { |
a2fb29a5 DG |
573 | DBG("Clean command context structure"); |
574 | if (*cmd_ctx) { | |
575 | if ((*cmd_ctx)->llm) { | |
576 | free((*cmd_ctx)->llm); | |
5461b305 | 577 | } |
a2fb29a5 DG |
578 | if ((*cmd_ctx)->lsm) { |
579 | free((*cmd_ctx)->lsm); | |
5461b305 | 580 | } |
a2fb29a5 DG |
581 | free(*cmd_ctx); |
582 | *cmd_ctx = NULL; | |
5461b305 DG |
583 | } |
584 | } | |
585 | ||
fac6795d | 586 | /* |
0fdd1e2c | 587 | * Notify UST applications using the shm mmap futex. |
fac6795d | 588 | */ |
0fdd1e2c | 589 | static int notify_ust_apps(int active) |
fac6795d | 590 | { |
0fdd1e2c | 591 | char *wait_shm_mmap; |
fac6795d | 592 | |
0fdd1e2c | 593 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 594 | |
0fdd1e2c DG |
595 | /* See shm.c for this call implying mmap, shm and futex calls */ |
596 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
597 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
598 | goto error; |
599 | } | |
600 | ||
0fdd1e2c DG |
601 | /* Wake waiting process */ |
602 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
603 | ||
604 | /* Apps notified successfully */ | |
605 | return 0; | |
fac6795d DG |
606 | |
607 | error: | |
0fdd1e2c | 608 | return -1; |
fac6795d DG |
609 | } |
610 | ||
e065084a | 611 | /* |
d063d709 DG |
612 | * Setup the outgoing data buffer for the response (llm) by allocating the |
613 | * right amount of memory and copying the original information from the lsm | |
614 | * structure. | |
ca95a216 | 615 | * |
d063d709 | 616 | * Return total size of the buffer pointed by buf. |
ca95a216 | 617 | */ |
5461b305 | 618 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 619 | { |
f3ed775e | 620 | int ret, buf_size; |
ca95a216 | 621 | |
f3ed775e | 622 | buf_size = size; |
5461b305 | 623 | |
ba7f0ae5 | 624 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 625 | if (cmd_ctx->llm == NULL) { |
76d7553f | 626 | PERROR("zmalloc"); |
5461b305 | 627 | ret = -ENOMEM; |
ca95a216 DG |
628 | goto error; |
629 | } | |
630 | ||
5461b305 DG |
631 | /* Copy common data */ |
632 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 633 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 634 | |
5461b305 DG |
635 | cmd_ctx->llm->data_size = size; |
636 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
637 | ||
ca95a216 DG |
638 | return buf_size; |
639 | ||
640 | error: | |
641 | return ret; | |
642 | } | |
643 | ||
7a485870 | 644 | /* |
5eb91c98 | 645 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 646 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 647 | */ |
5eb91c98 | 648 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 649 | { |
5eb91c98 | 650 | int ret; |
7a485870 DG |
651 | struct ltt_session *session; |
652 | struct ltt_kernel_channel *channel; | |
653 | ||
5eb91c98 | 654 | DBG("Updating kernel poll set"); |
7a485870 | 655 | |
54d01ffb | 656 | session_lock_list(); |
b5541356 | 657 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 658 | session_lock(session); |
7a485870 | 659 | if (session->kernel_session == NULL) { |
54d01ffb | 660 | session_unlock(session); |
7a485870 DG |
661 | continue; |
662 | } | |
7a485870 | 663 | |
54d01ffb DG |
664 | cds_list_for_each_entry(channel, |
665 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
666 | /* Add channel fd to the kernel poll set */ |
667 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
668 | if (ret < 0) { | |
54d01ffb | 669 | session_unlock(session); |
5eb91c98 DG |
670 | goto error; |
671 | } | |
672 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 673 | } |
54d01ffb | 674 | session_unlock(session); |
7a485870 | 675 | } |
54d01ffb | 676 | session_unlock_list(); |
7a485870 | 677 | |
5eb91c98 | 678 | return 0; |
7a485870 DG |
679 | |
680 | error: | |
54d01ffb | 681 | session_unlock_list(); |
7a485870 DG |
682 | return -1; |
683 | } | |
684 | ||
685 | /* | |
54d01ffb | 686 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 687 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 688 | * |
d063d709 | 689 | * Useful for CPU hotplug feature. |
7a485870 | 690 | */ |
2bdd86d4 | 691 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
692 | { |
693 | int ret = 0; | |
694 | struct ltt_session *session; | |
173af62f | 695 | struct ltt_kernel_session *ksess; |
7a485870 DG |
696 | struct ltt_kernel_channel *channel; |
697 | ||
698 | DBG("Updating kernel streams for channel fd %d", fd); | |
699 | ||
54d01ffb | 700 | session_lock_list(); |
b5541356 | 701 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 702 | session_lock(session); |
7a485870 | 703 | if (session->kernel_session == NULL) { |
54d01ffb | 704 | session_unlock(session); |
7a485870 DG |
705 | continue; |
706 | } | |
173af62f | 707 | ksess = session->kernel_session; |
d9800920 | 708 | |
173af62f | 709 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
710 | if (channel->fd == fd) { |
711 | DBG("Channel found, updating kernel streams"); | |
712 | ret = kernel_open_channel_stream(channel); | |
713 | if (ret < 0) { | |
b3c750d2 | 714 | goto error; |
7a485870 | 715 | } |
5c786ded JD |
716 | /* Update the stream global counter */ |
717 | ksess->stream_count_global += ret; | |
d9800920 | 718 | |
7a485870 | 719 | /* |
5eb91c98 DG |
720 | * Have we already sent fds to the consumer? If yes, it means |
721 | * that tracing is started so it is safe to send our updated | |
722 | * stream fds. | |
7a485870 | 723 | */ |
173af62f DG |
724 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
725 | struct lttng_ht_iter iter; | |
726 | struct consumer_socket *socket; | |
727 | ||
e7fe706f | 728 | rcu_read_lock(); |
173af62f DG |
729 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
730 | &iter.iter, socket, node.node) { | |
173af62f | 731 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 732 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
733 | channel, ksess, |
734 | session->output_traces ? 1 : 0); | |
173af62f DG |
735 | pthread_mutex_unlock(socket->lock); |
736 | if (ret < 0) { | |
e7fe706f | 737 | rcu_read_unlock(); |
173af62f DG |
738 | goto error; |
739 | } | |
7a485870 | 740 | } |
e7fe706f | 741 | rcu_read_unlock(); |
7a485870 | 742 | } |
b3c750d2 | 743 | goto error; |
7a485870 DG |
744 | } |
745 | } | |
54d01ffb | 746 | session_unlock(session); |
7a485870 | 747 | } |
54d01ffb | 748 | session_unlock_list(); |
b3c750d2 | 749 | return ret; |
7a485870 | 750 | |
b3c750d2 | 751 | error: |
54d01ffb DG |
752 | session_unlock(session); |
753 | session_unlock_list(); | |
7a485870 DG |
754 | return ret; |
755 | } | |
756 | ||
487cf67c | 757 | /* |
ffe60014 DG |
758 | * For each tracing session, update newly registered apps. The session list |
759 | * lock MUST be acquired before calling this. | |
487cf67c DG |
760 | */ |
761 | static void update_ust_app(int app_sock) | |
762 | { | |
763 | struct ltt_session *sess, *stmp; | |
764 | ||
fdadac08 DG |
765 | /* Consumer is in an ERROR state. Stop any application update. */ |
766 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
767 | /* Stop the update process since the consumer is dead. */ | |
768 | return; | |
769 | } | |
770 | ||
487cf67c DG |
771 | /* For all tracing session(s) */ |
772 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 773 | session_lock(sess); |
421cb601 DG |
774 | if (sess->ust_session) { |
775 | ust_app_global_update(sess->ust_session, app_sock); | |
776 | } | |
4ee14516 | 777 | session_unlock(sess); |
487cf67c DG |
778 | } |
779 | } | |
780 | ||
7a485870 | 781 | /* |
d063d709 | 782 | * This thread manage event coming from the kernel. |
7a485870 | 783 | * |
d063d709 DG |
784 | * Features supported in this thread: |
785 | * -) CPU Hotplug | |
7a485870 DG |
786 | */ |
787 | static void *thread_manage_kernel(void *data) | |
788 | { | |
139ac872 | 789 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 790 | uint32_t revents, nb_fd; |
7a485870 | 791 | char tmp; |
5eb91c98 | 792 | struct lttng_poll_event events; |
7a485870 | 793 | |
6993eeb3 | 794 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 795 | |
6c71277b | 796 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 797 | |
d5d63bf1 DG |
798 | /* |
799 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 800 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 801 | */ |
6d737ce4 | 802 | lttng_poll_init(&events); |
d5d63bf1 | 803 | |
6993eeb3 CB |
804 | if (testpoint(thread_manage_kernel)) { |
805 | goto error_testpoint; | |
806 | } | |
8ac94142 | 807 | |
840cb59c | 808 | health_code_update(); |
44a5e5eb | 809 | |
6993eeb3 | 810 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 811 | goto error_testpoint; |
6993eeb3 CB |
812 | } |
813 | ||
7a485870 | 814 | while (1) { |
840cb59c | 815 | health_code_update(); |
44a5e5eb | 816 | |
7a485870 | 817 | if (update_poll_flag == 1) { |
d21b0d71 DG |
818 | /* Clean events object. We are about to populate it again. */ |
819 | lttng_poll_clean(&events); | |
820 | ||
d0b96690 | 821 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
822 | if (ret < 0) { |
823 | goto error_poll_create; | |
824 | } | |
825 | ||
826 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
827 | if (ret < 0) { | |
828 | goto error; | |
829 | } | |
5f822d0a | 830 | |
d21b0d71 | 831 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
832 | ret = update_kernel_poll(&events); |
833 | if (ret < 0) { | |
7a485870 DG |
834 | goto error; |
835 | } | |
836 | update_poll_flag = 0; | |
837 | } | |
838 | ||
d21b0d71 | 839 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
840 | |
841 | /* Poll infinite value of time */ | |
88f2b785 | 842 | restart: |
a78af745 | 843 | health_poll_entry(); |
5eb91c98 | 844 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 845 | health_poll_exit(); |
7a485870 | 846 | if (ret < 0) { |
88f2b785 MD |
847 | /* |
848 | * Restart interrupted system call. | |
849 | */ | |
850 | if (errno == EINTR) { | |
851 | goto restart; | |
852 | } | |
7a485870 DG |
853 | goto error; |
854 | } else if (ret == 0) { | |
855 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
856 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
857 | "This should not have happened! Continuing..."); | |
7a485870 DG |
858 | continue; |
859 | } | |
860 | ||
0d9c5d77 DG |
861 | nb_fd = ret; |
862 | ||
5eb91c98 DG |
863 | for (i = 0; i < nb_fd; i++) { |
864 | /* Fetch once the poll data */ | |
865 | revents = LTTNG_POLL_GETEV(&events, i); | |
866 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 867 | |
840cb59c | 868 | health_code_update(); |
44a5e5eb | 869 | |
5eb91c98 | 870 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 871 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 872 | if (ret) { |
139ac872 MD |
873 | err = 0; |
874 | goto exit; | |
5eb91c98 | 875 | } |
7a485870 | 876 | |
5eb91c98 DG |
877 | /* Check for data on kernel pipe */ |
878 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
879 | (void) lttng_read(kernel_poll_pipe[0], |
880 | &tmp, 1); | |
f921c78f DG |
881 | /* |
882 | * Ret value is useless here, if this pipe gets any actions an | |
883 | * update is required anyway. | |
884 | */ | |
5eb91c98 DG |
885 | update_poll_flag = 1; |
886 | continue; | |
887 | } else { | |
888 | /* | |
889 | * New CPU detected by the kernel. Adding kernel stream to | |
890 | * kernel session and updating the kernel consumer | |
891 | */ | |
892 | if (revents & LPOLLIN) { | |
2bdd86d4 | 893 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
894 | if (ret < 0) { |
895 | continue; | |
896 | } | |
897 | break; | |
898 | /* | |
899 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
900 | * and unregister kernel stream at this point. | |
901 | */ | |
7a485870 | 902 | } |
7a485870 DG |
903 | } |
904 | } | |
905 | } | |
906 | ||
139ac872 | 907 | exit: |
7a485870 | 908 | error: |
5eb91c98 | 909 | lttng_poll_clean(&events); |
76d7553f | 910 | error_poll_create: |
6993eeb3 | 911 | error_testpoint: |
6620da75 DG |
912 | utils_close_pipe(kernel_poll_pipe); |
913 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 914 | if (err) { |
840cb59c | 915 | health_error(); |
139ac872 | 916 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
917 | WARN("Kernel thread died unexpectedly. " |
918 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 919 | } |
8782cc74 | 920 | health_unregister(health_sessiond); |
76d7553f | 921 | DBG("Kernel thread dying"); |
7a485870 DG |
922 | return NULL; |
923 | } | |
924 | ||
a23ec3a7 DG |
925 | /* |
926 | * Signal pthread condition of the consumer data that the thread. | |
927 | */ | |
928 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
929 | { | |
930 | pthread_mutex_lock(&data->cond_mutex); | |
931 | ||
932 | /* | |
933 | * The state is set before signaling. It can be any value, it's the waiter | |
934 | * job to correctly interpret this condition variable associated to the | |
935 | * consumer pthread_cond. | |
936 | * | |
937 | * A value of 0 means that the corresponding thread of the consumer data | |
938 | * was not started. 1 indicates that the thread has started and is ready | |
939 | * for action. A negative value means that there was an error during the | |
940 | * thread bootstrap. | |
941 | */ | |
942 | data->consumer_thread_is_ready = state; | |
943 | (void) pthread_cond_signal(&data->cond); | |
944 | ||
945 | pthread_mutex_unlock(&data->cond_mutex); | |
946 | } | |
947 | ||
1d4b027a | 948 | /* |
3bd1e081 | 949 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 950 | */ |
3bd1e081 | 951 | static void *thread_manage_consumer(void *data) |
1d4b027a | 952 | { |
139ac872 | 953 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 954 | uint32_t revents, nb_fd; |
1d4b027a | 955 | enum lttcomm_return_code code; |
5eb91c98 | 956 | struct lttng_poll_event events; |
3bd1e081 | 957 | struct consumer_data *consumer_data = data; |
1d4b027a | 958 | |
3bd1e081 | 959 | DBG("[thread] Manage consumer started"); |
1d4b027a | 960 | |
6c71277b | 961 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 962 | |
855060f8 | 963 | health_code_update(); |
9449cc75 | 964 | |
5eb91c98 | 965 | /* |
331744e3 JD |
966 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
967 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 968 | */ |
331744e3 | 969 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 970 | if (ret < 0) { |
76d7553f | 971 | goto error_poll; |
5eb91c98 | 972 | } |
273ea72c | 973 | |
edb8b045 DG |
974 | /* |
975 | * The error socket here is already in a listening state which was done | |
976 | * just before spawning this thread to avoid a race between the consumer | |
977 | * daemon exec trying to connect and the listen() call. | |
978 | */ | |
3bd1e081 | 979 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
980 | if (ret < 0) { |
981 | goto error; | |
982 | } | |
983 | ||
840cb59c | 984 | health_code_update(); |
44a5e5eb | 985 | |
331744e3 | 986 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 987 | restart: |
a78af745 | 988 | health_poll_entry(); |
8ac94142 | 989 | |
6993eeb3 CB |
990 | if (testpoint(thread_manage_consumer)) { |
991 | goto error; | |
992 | } | |
8ac94142 | 993 | |
5eb91c98 | 994 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 995 | health_poll_exit(); |
273ea72c | 996 | if (ret < 0) { |
88f2b785 MD |
997 | /* |
998 | * Restart interrupted system call. | |
999 | */ | |
1000 | if (errno == EINTR) { | |
1001 | goto restart; | |
1002 | } | |
273ea72c DG |
1003 | goto error; |
1004 | } | |
1005 | ||
0d9c5d77 DG |
1006 | nb_fd = ret; |
1007 | ||
5eb91c98 DG |
1008 | for (i = 0; i < nb_fd; i++) { |
1009 | /* Fetch once the poll data */ | |
1010 | revents = LTTNG_POLL_GETEV(&events, i); | |
1011 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1012 | ||
840cb59c | 1013 | health_code_update(); |
44a5e5eb | 1014 | |
5eb91c98 | 1015 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1016 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1017 | if (ret) { |
139ac872 MD |
1018 | err = 0; |
1019 | goto exit; | |
5eb91c98 DG |
1020 | } |
1021 | ||
1022 | /* Event on the registration socket */ | |
3bd1e081 | 1023 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1024 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1025 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1026 | goto error; |
1027 | } | |
1028 | } | |
273ea72c DG |
1029 | } |
1030 | ||
3bd1e081 | 1031 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1032 | if (sock < 0) { |
1033 | goto error; | |
1034 | } | |
1035 | ||
b662582b DG |
1036 | /* |
1037 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1038 | * show must go on. | |
1039 | */ | |
1040 | (void) utils_set_fd_cloexec(sock); | |
1041 | ||
840cb59c | 1042 | health_code_update(); |
44a5e5eb | 1043 | |
3bd1e081 | 1044 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1045 | |
712ea556 | 1046 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1047 | ret = lttcomm_recv_unix_sock(sock, &code, |
1048 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1049 | if (ret <= 0) { |
1050 | goto error; | |
1051 | } | |
1052 | ||
840cb59c | 1053 | health_code_update(); |
44a5e5eb | 1054 | |
f73fabfd | 1055 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1056 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1057 | consumer_data->cmd_sock = |
1058 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1059 | consumer_data->metadata_fd = |
331744e3 | 1060 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1061 | if (consumer_data->cmd_sock < 0 |
1062 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1063 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1064 | /* On error, signal condition and quit. */ |
1065 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1066 | goto error; |
1067 | } | |
9363801e | 1068 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1069 | /* Create metadata socket lock. */ |
1070 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1071 | if (consumer_data->metadata_sock.lock == NULL) { | |
1072 | PERROR("zmalloc pthread mutex"); | |
1073 | ret = -1; | |
1074 | goto error; | |
1075 | } | |
1076 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1077 | ||
a23ec3a7 | 1078 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1079 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1080 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1081 | consumer_data->metadata_fd); |
1d4b027a | 1082 | } else { |
3bd1e081 | 1083 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1084 | lttcomm_get_readable_code(-code)); |
1085 | goto error; | |
1086 | } | |
1087 | ||
331744e3 | 1088 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1089 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1090 | if (ret < 0) { |
72079cae DG |
1091 | goto error; |
1092 | } | |
1093 | ||
331744e3 | 1094 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1095 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1096 | if (ret < 0) { | |
72079cae | 1097 | goto error; |
5eb91c98 DG |
1098 | } |
1099 | ||
331744e3 | 1100 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1101 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1102 | LPOLLIN | LPOLLRDHUP); |
1103 | if (ret < 0) { | |
1104 | goto error; | |
1105 | } | |
1106 | ||
840cb59c | 1107 | health_code_update(); |
44a5e5eb | 1108 | |
331744e3 | 1109 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1110 | restart_poll: |
331744e3 JD |
1111 | while (1) { |
1112 | health_poll_entry(); | |
1113 | ret = lttng_poll_wait(&events, -1); | |
1114 | health_poll_exit(); | |
1115 | if (ret < 0) { | |
1116 | /* | |
1117 | * Restart interrupted system call. | |
1118 | */ | |
1119 | if (errno == EINTR) { | |
1120 | goto restart_poll; | |
1121 | } | |
1122 | goto error; | |
88f2b785 | 1123 | } |
72079cae | 1124 | |
331744e3 | 1125 | nb_fd = ret; |
0d9c5d77 | 1126 | |
331744e3 JD |
1127 | for (i = 0; i < nb_fd; i++) { |
1128 | /* Fetch once the poll data */ | |
1129 | revents = LTTNG_POLL_GETEV(&events, i); | |
1130 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1131 | |
331744e3 | 1132 | health_code_update(); |
44a5e5eb | 1133 | |
331744e3 JD |
1134 | /* Thread quit pipe has been closed. Killing thread. */ |
1135 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1136 | if (ret) { | |
1137 | err = 0; | |
1138 | goto exit; | |
1139 | } | |
5eb91c98 | 1140 | |
331744e3 JD |
1141 | if (pollfd == sock) { |
1142 | /* Event on the consumerd socket */ | |
1143 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1144 | ERR("consumer err socket second poll error"); | |
1145 | goto error; | |
1146 | } | |
1147 | health_code_update(); | |
1148 | /* Wait for any kconsumerd error */ | |
1149 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1150 | sizeof(enum lttcomm_return_code)); | |
1151 | if (ret <= 0) { | |
1152 | ERR("consumer closed the command socket"); | |
1153 | goto error; | |
1154 | } | |
1155 | ||
1156 | ERR("consumer return code : %s", | |
1157 | lttcomm_get_readable_code(-code)); | |
1158 | ||
1159 | goto exit; | |
4ce514c4 | 1160 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1161 | /* UST metadata requests */ |
1162 | ret = ust_consumer_metadata_request( | |
1163 | &consumer_data->metadata_sock); | |
1164 | if (ret < 0) { | |
1165 | ERR("Handling metadata request"); | |
1166 | goto error; | |
1167 | } | |
1168 | break; | |
1169 | } else { | |
1170 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1171 | goto error; |
1172 | } | |
1173 | } | |
331744e3 | 1174 | health_code_update(); |
5eb91c98 DG |
1175 | } |
1176 | ||
139ac872 | 1177 | exit: |
1d4b027a | 1178 | error: |
fdadac08 DG |
1179 | /* |
1180 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1181 | * thread might be using them so get exclusive access which will abort all |
1182 | * other consumer command by other threads. | |
fdadac08 DG |
1183 | */ |
1184 | pthread_mutex_lock(&consumer_data->lock); | |
1185 | ||
5c827ce0 DG |
1186 | /* Immediately set the consumerd state to stopped */ |
1187 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1188 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1189 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1190 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1191 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1192 | } else { | |
1193 | /* Code flow error... */ | |
1194 | assert(0); | |
1195 | } | |
1196 | ||
76d7553f MD |
1197 | if (consumer_data->err_sock >= 0) { |
1198 | ret = close(consumer_data->err_sock); | |
1199 | if (ret) { | |
1200 | PERROR("close"); | |
1201 | } | |
a76cbd9f | 1202 | consumer_data->err_sock = -1; |
76d7553f MD |
1203 | } |
1204 | if (consumer_data->cmd_sock >= 0) { | |
1205 | ret = close(consumer_data->cmd_sock); | |
1206 | if (ret) { | |
1207 | PERROR("close"); | |
1208 | } | |
a76cbd9f | 1209 | consumer_data->cmd_sock = -1; |
76d7553f | 1210 | } |
9363801e DG |
1211 | if (*consumer_data->metadata_sock.fd_ptr >= 0) { |
1212 | ret = close(*consumer_data->metadata_sock.fd_ptr); | |
331744e3 JD |
1213 | if (ret) { |
1214 | PERROR("close"); | |
1215 | } | |
1216 | } | |
331744e3 | 1217 | |
76d7553f MD |
1218 | if (sock >= 0) { |
1219 | ret = close(sock); | |
1220 | if (ret) { | |
1221 | PERROR("close"); | |
1222 | } | |
1223 | } | |
273ea72c | 1224 | |
3bd1e081 MD |
1225 | unlink(consumer_data->err_unix_sock_path); |
1226 | unlink(consumer_data->cmd_unix_sock_path); | |
1227 | consumer_data->pid = 0; | |
fdadac08 | 1228 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1229 | |
fdadac08 DG |
1230 | /* Cleanup metadata socket mutex. */ |
1231 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1232 | free(consumer_data->metadata_sock.lock); | |
1d4b027a | 1233 | |
5eb91c98 | 1234 | lttng_poll_clean(&events); |
76d7553f | 1235 | error_poll: |
139ac872 | 1236 | if (err) { |
840cb59c | 1237 | health_error(); |
139ac872 MD |
1238 | ERR("Health error occurred in %s", __func__); |
1239 | } | |
8782cc74 | 1240 | health_unregister(health_sessiond); |
76d7553f | 1241 | DBG("consumer thread cleanup completed"); |
0177d773 | 1242 | |
5eb91c98 | 1243 | return NULL; |
099e26bd DG |
1244 | } |
1245 | ||
099e26bd DG |
1246 | /* |
1247 | * This thread manage application communication. | |
1d4b027a DG |
1248 | */ |
1249 | static void *thread_manage_apps(void *data) | |
099e26bd | 1250 | { |
139ac872 | 1251 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1252 | ssize_t size_ret; |
5eb91c98 | 1253 | uint32_t revents, nb_fd; |
5eb91c98 | 1254 | struct lttng_poll_event events; |
099e26bd DG |
1255 | |
1256 | DBG("[thread] Manage application started"); | |
1257 | ||
f6a9efaa DG |
1258 | rcu_register_thread(); |
1259 | rcu_thread_online(); | |
1260 | ||
6c71277b | 1261 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1262 | |
6993eeb3 CB |
1263 | if (testpoint(thread_manage_apps)) { |
1264 | goto error_testpoint; | |
1265 | } | |
1266 | ||
840cb59c | 1267 | health_code_update(); |
44a5e5eb | 1268 | |
d0b96690 | 1269 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1270 | if (ret < 0) { |
76d7553f | 1271 | goto error_poll_create; |
5eb91c98 | 1272 | } |
099e26bd | 1273 | |
5eb91c98 DG |
1274 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1275 | if (ret < 0) { | |
1276 | goto error; | |
1277 | } | |
099e26bd | 1278 | |
6993eeb3 CB |
1279 | if (testpoint(thread_manage_apps_before_loop)) { |
1280 | goto error; | |
1281 | } | |
8ac94142 | 1282 | |
840cb59c | 1283 | health_code_update(); |
44a5e5eb | 1284 | |
5eb91c98 | 1285 | while (1) { |
d21b0d71 | 1286 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1287 | |
1288 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1289 | restart: |
a78af745 | 1290 | health_poll_entry(); |
5eb91c98 | 1291 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1292 | health_poll_exit(); |
099e26bd | 1293 | if (ret < 0) { |
88f2b785 MD |
1294 | /* |
1295 | * Restart interrupted system call. | |
1296 | */ | |
1297 | if (errno == EINTR) { | |
1298 | goto restart; | |
1299 | } | |
099e26bd DG |
1300 | goto error; |
1301 | } | |
1302 | ||
0d9c5d77 DG |
1303 | nb_fd = ret; |
1304 | ||
5eb91c98 DG |
1305 | for (i = 0; i < nb_fd; i++) { |
1306 | /* Fetch once the poll data */ | |
1307 | revents = LTTNG_POLL_GETEV(&events, i); | |
1308 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1309 | ||
840cb59c | 1310 | health_code_update(); |
44a5e5eb | 1311 | |
5eb91c98 | 1312 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1313 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1314 | if (ret) { |
139ac872 MD |
1315 | err = 0; |
1316 | goto exit; | |
5eb91c98 | 1317 | } |
099e26bd | 1318 | |
5eb91c98 DG |
1319 | /* Inspect the apps cmd pipe */ |
1320 | if (pollfd == apps_cmd_pipe[0]) { | |
1321 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1322 | ERR("Apps command pipe error"); | |
0177d773 | 1323 | goto error; |
5eb91c98 | 1324 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1325 | int sock; |
1326 | ||
5eb91c98 | 1327 | /* Empty pipe */ |
6cd525e8 MD |
1328 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1329 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1330 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1331 | goto error; |
1332 | } | |
099e26bd | 1333 | |
840cb59c | 1334 | health_code_update(); |
44a5e5eb | 1335 | |
ffe60014 | 1336 | /* |
d0b96690 DG |
1337 | * We only monitor the error events of the socket. This |
1338 | * thread does not handle any incoming data from UST | |
1339 | * (POLLIN). | |
ffe60014 | 1340 | */ |
d0b96690 DG |
1341 | ret = lttng_poll_add(&events, sock, |
1342 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1343 | if (ret < 0) { | |
5eb91c98 | 1344 | goto error; |
e0c7ec2b | 1345 | } |
acc7b41b | 1346 | |
d0b96690 | 1347 | DBG("Apps with sock %d added to poll set", sock); |
487cf67c | 1348 | |
840cb59c | 1349 | health_code_update(); |
44a5e5eb | 1350 | |
5eb91c98 | 1351 | break; |
0177d773 | 1352 | } |
5eb91c98 DG |
1353 | } else { |
1354 | /* | |
54d01ffb DG |
1355 | * At this point, we know that a registered application made |
1356 | * the event at poll_wait. | |
5eb91c98 DG |
1357 | */ |
1358 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1359 | /* Removing from the poll set */ | |
1360 | ret = lttng_poll_del(&events, pollfd); | |
1361 | if (ret < 0) { | |
1362 | goto error; | |
1363 | } | |
099e26bd | 1364 | |
b9d9b220 | 1365 | /* Socket closed on remote end. */ |
56fff090 | 1366 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1367 | break; |
1368 | } | |
099e26bd | 1369 | } |
44a5e5eb | 1370 | |
840cb59c | 1371 | health_code_update(); |
099e26bd | 1372 | } |
099e26bd DG |
1373 | } |
1374 | ||
139ac872 | 1375 | exit: |
099e26bd | 1376 | error: |
5eb91c98 | 1377 | lttng_poll_clean(&events); |
76d7553f | 1378 | error_poll_create: |
6993eeb3 | 1379 | error_testpoint: |
6620da75 DG |
1380 | utils_close_pipe(apps_cmd_pipe); |
1381 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1382 | ||
1383 | /* | |
1384 | * We don't clean the UST app hash table here since already registered | |
1385 | * applications can still be controlled so let them be until the session | |
1386 | * daemon dies or the applications stop. | |
1387 | */ | |
1388 | ||
139ac872 | 1389 | if (err) { |
840cb59c | 1390 | health_error(); |
139ac872 MD |
1391 | ERR("Health error occurred in %s", __func__); |
1392 | } | |
8782cc74 | 1393 | health_unregister(health_sessiond); |
76d7553f | 1394 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1395 | rcu_thread_offline(); |
1396 | rcu_unregister_thread(); | |
099e26bd DG |
1397 | return NULL; |
1398 | } | |
1399 | ||
d0b96690 | 1400 | /* |
d88aee68 DG |
1401 | * Send a socket to a thread This is called from the dispatch UST registration |
1402 | * thread once all sockets are set for the application. | |
d0b96690 | 1403 | * |
b85dc84c DG |
1404 | * The sock value can be invalid, we don't really care, the thread will handle |
1405 | * it and make the necessary cleanup if so. | |
1406 | * | |
d0b96690 DG |
1407 | * On success, return 0 else a negative value being the errno message of the |
1408 | * write(). | |
1409 | */ | |
d88aee68 | 1410 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1411 | { |
6cd525e8 | 1412 | ssize_t ret; |
d0b96690 | 1413 | |
b85dc84c DG |
1414 | /* |
1415 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1416 | * before calling this function being a shutdown state of the thread. | |
1417 | */ | |
1418 | if (fd < 0) { | |
1419 | ret = -EBADF; | |
1420 | goto error; | |
1421 | } | |
d0b96690 | 1422 | |
6cd525e8 MD |
1423 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1424 | if (ret < sizeof(sock)) { | |
d88aee68 | 1425 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1426 | if (ret < 0) { |
1427 | ret = -errno; | |
1428 | } | |
1429 | goto error; | |
1430 | } | |
1431 | ||
1432 | /* All good. Don't send back the write positive ret value. */ | |
1433 | ret = 0; | |
1434 | error: | |
6cd525e8 | 1435 | return (int) ret; |
d0b96690 DG |
1436 | } |
1437 | ||
f45e313d DG |
1438 | /* |
1439 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1440 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1441 | * notify socket is never received. | |
1442 | */ | |
1443 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1444 | { | |
1445 | int ret, nb_fd = 0, i; | |
1446 | unsigned int fd_added = 0; | |
1447 | struct lttng_poll_event events; | |
1448 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1449 | ||
1450 | assert(wait_queue); | |
1451 | ||
1452 | lttng_poll_init(&events); | |
1453 | ||
1454 | /* Just skip everything for an empty queue. */ | |
1455 | if (!wait_queue->count) { | |
1456 | goto end; | |
1457 | } | |
1458 | ||
1459 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1460 | if (ret < 0) { | |
1461 | goto error_create; | |
1462 | } | |
1463 | ||
1464 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1465 | &wait_queue->head, head) { | |
1466 | assert(wait_node->app); | |
1467 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1468 | LPOLLHUP | LPOLLERR); | |
1469 | if (ret < 0) { | |
1470 | goto error; | |
1471 | } | |
1472 | ||
1473 | fd_added = 1; | |
1474 | } | |
1475 | ||
1476 | if (!fd_added) { | |
1477 | goto end; | |
1478 | } | |
1479 | ||
1480 | /* | |
1481 | * Poll but don't block so we can quickly identify the faulty events and | |
1482 | * clean them afterwards from the wait queue. | |
1483 | */ | |
1484 | ret = lttng_poll_wait(&events, 0); | |
1485 | if (ret < 0) { | |
1486 | goto error; | |
1487 | } | |
1488 | nb_fd = ret; | |
1489 | ||
1490 | for (i = 0; i < nb_fd; i++) { | |
1491 | /* Get faulty FD. */ | |
1492 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1493 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1494 | ||
1495 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1496 | &wait_queue->head, head) { | |
1497 | if (pollfd == wait_node->app->sock && | |
1498 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1499 | cds_list_del(&wait_node->head); | |
1500 | wait_queue->count--; | |
1501 | ust_app_destroy(wait_node->app); | |
1502 | free(wait_node); | |
1503 | break; | |
1504 | } | |
1505 | } | |
1506 | } | |
1507 | ||
1508 | if (nb_fd > 0) { | |
1509 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1510 | } | |
1511 | ||
1512 | end: | |
1513 | lttng_poll_clean(&events); | |
1514 | return; | |
1515 | ||
1516 | error: | |
1517 | lttng_poll_clean(&events); | |
1518 | error_create: | |
1519 | ERR("Unable to sanitize wait queue"); | |
1520 | return; | |
1521 | } | |
1522 | ||
099e26bd DG |
1523 | /* |
1524 | * Dispatch request from the registration threads to the application | |
1525 | * communication thread. | |
1526 | */ | |
1527 | static void *thread_dispatch_ust_registration(void *data) | |
1528 | { | |
12e2b881 | 1529 | int ret, err = -1; |
099e26bd DG |
1530 | struct cds_wfq_node *node; |
1531 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1532 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1533 | struct ust_reg_wait_queue wait_queue = { | |
1534 | .count = 0, | |
1535 | }; | |
d0b96690 | 1536 | |
6c71277b | 1537 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 MD |
1538 | |
1539 | health_code_update(); | |
1540 | ||
f45e313d | 1541 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1542 | |
1543 | DBG("[thread] Dispatch UST command started"); | |
1544 | ||
26c9d55e | 1545 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1546 | health_code_update(); |
1547 | ||
099e26bd DG |
1548 | /* Atomically prepare the queue futex */ |
1549 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1550 | ||
1551 | do { | |
d0b96690 | 1552 | struct ust_app *app = NULL; |
7972aab2 | 1553 | ust_cmd = NULL; |
d0b96690 | 1554 | |
f45e313d DG |
1555 | /* |
1556 | * Make sure we don't have node(s) that have hung up before receiving | |
1557 | * the notify socket. This is to clean the list in order to avoid | |
1558 | * memory leaks from notify socket that are never seen. | |
1559 | */ | |
1560 | sanitize_wait_queue(&wait_queue); | |
1561 | ||
12e2b881 | 1562 | health_code_update(); |
099e26bd DG |
1563 | /* Dequeue command for registration */ |
1564 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1565 | if (node == NULL) { | |
00a17c97 | 1566 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1567 | /* Continue thread execution */ |
1568 | break; | |
1569 | } | |
1570 | ||
1571 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1572 | ||
2f50c8a3 DG |
1573 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1574 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1575 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1576 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1577 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1578 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1579 | |
1580 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1581 | wait_node = zmalloc(sizeof(*wait_node)); | |
1582 | if (!wait_node) { | |
1583 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1584 | ret = close(ust_cmd->sock); |
1585 | if (ret < 0) { | |
1586 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1587 | } | |
51dec90d | 1588 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1589 | free(ust_cmd); |
d0b96690 DG |
1590 | goto error; |
1591 | } | |
1592 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1593 | ||
1594 | /* Create application object if socket is CMD. */ | |
1595 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1596 | ust_cmd->sock); | |
1597 | if (!wait_node->app) { | |
1598 | ret = close(ust_cmd->sock); | |
1599 | if (ret < 0) { | |
1600 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1601 | } |
51dec90d | 1602 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1603 | free(wait_node); |
7972aab2 | 1604 | free(ust_cmd); |
d0b96690 DG |
1605 | continue; |
1606 | } | |
1607 | /* | |
1608 | * Add application to the wait queue so we can set the notify | |
1609 | * socket before putting this object in the global ht. | |
1610 | */ | |
f45e313d DG |
1611 | cds_list_add(&wait_node->head, &wait_queue.head); |
1612 | wait_queue.count++; | |
d0b96690 | 1613 | |
7972aab2 | 1614 | free(ust_cmd); |
d0b96690 DG |
1615 | /* |
1616 | * We have to continue here since we don't have the notify | |
1617 | * socket and the application MUST be added to the hash table | |
1618 | * only at that moment. | |
1619 | */ | |
1620 | continue; | |
1621 | } else { | |
1622 | /* | |
1623 | * Look for the application in the local wait queue and set the | |
1624 | * notify socket if found. | |
1625 | */ | |
d88aee68 | 1626 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1627 | &wait_queue.head, head) { |
12e2b881 | 1628 | health_code_update(); |
d0b96690 DG |
1629 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1630 | wait_node->app->notify_sock = ust_cmd->sock; | |
1631 | cds_list_del(&wait_node->head); | |
f45e313d | 1632 | wait_queue.count--; |
d0b96690 DG |
1633 | app = wait_node->app; |
1634 | free(wait_node); | |
1635 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1636 | break; | |
1637 | } | |
1638 | } | |
020d7f60 DG |
1639 | |
1640 | /* | |
1641 | * With no application at this stage the received socket is | |
1642 | * basically useless so close it before we free the cmd data | |
1643 | * structure for good. | |
1644 | */ | |
1645 | if (!app) { | |
1646 | ret = close(ust_cmd->sock); | |
1647 | if (ret < 0) { | |
1648 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1649 | } | |
51dec90d | 1650 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1651 | } |
7972aab2 | 1652 | free(ust_cmd); |
d0b96690 DG |
1653 | } |
1654 | ||
1655 | if (app) { | |
d0b96690 DG |
1656 | /* |
1657 | * @session_lock_list | |
1658 | * | |
1659 | * Lock the global session list so from the register up to the | |
1660 | * registration done message, no thread can see the application | |
1661 | * and change its state. | |
1662 | */ | |
1663 | session_lock_list(); | |
1664 | rcu_read_lock(); | |
d88aee68 | 1665 | |
d0b96690 DG |
1666 | /* |
1667 | * Add application to the global hash table. This needs to be | |
1668 | * done before the update to the UST registry can locate the | |
1669 | * application. | |
1670 | */ | |
1671 | ust_app_add(app); | |
d88aee68 DG |
1672 | |
1673 | /* Set app version. This call will print an error if needed. */ | |
1674 | (void) ust_app_version(app); | |
1675 | ||
1676 | /* Send notify socket through the notify pipe. */ | |
1677 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1678 | app->notify_sock); | |
1679 | if (ret < 0) { | |
1680 | rcu_read_unlock(); | |
1681 | session_unlock_list(); | |
b85dc84c DG |
1682 | /* |
1683 | * No notify thread, stop the UST tracing. However, this is | |
1684 | * not an internal error of the this thread thus setting | |
1685 | * the health error code to a normal exit. | |
1686 | */ | |
1687 | err = 0; | |
d88aee68 | 1688 | goto error; |
6620da75 | 1689 | } |
d88aee68 | 1690 | |
d0b96690 DG |
1691 | /* |
1692 | * Update newly registered application with the tracing | |
1693 | * registry info already enabled information. | |
1694 | */ | |
1695 | update_ust_app(app->sock); | |
d88aee68 DG |
1696 | |
1697 | /* | |
1698 | * Don't care about return value. Let the manage apps threads | |
1699 | * handle app unregistration upon socket close. | |
1700 | */ | |
1701 | (void) ust_app_register_done(app->sock); | |
1702 | ||
1703 | /* | |
1704 | * Even if the application socket has been closed, send the app | |
1705 | * to the thread and unregistration will take place at that | |
1706 | * place. | |
1707 | */ | |
1708 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1709 | if (ret < 0) { |
d88aee68 DG |
1710 | rcu_read_unlock(); |
1711 | session_unlock_list(); | |
b85dc84c DG |
1712 | /* |
1713 | * No apps. thread, stop the UST tracing. However, this is | |
1714 | * not an internal error of the this thread thus setting | |
1715 | * the health error code to a normal exit. | |
1716 | */ | |
1717 | err = 0; | |
d88aee68 | 1718 | goto error; |
d0b96690 | 1719 | } |
d88aee68 | 1720 | |
d0b96690 DG |
1721 | rcu_read_unlock(); |
1722 | session_unlock_list(); | |
099e26bd | 1723 | } |
099e26bd DG |
1724 | } while (node != NULL); |
1725 | ||
12e2b881 | 1726 | health_poll_entry(); |
099e26bd DG |
1727 | /* Futex wait on queue. Blocking call on futex() */ |
1728 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1729 | health_poll_exit(); |
099e26bd | 1730 | } |
12e2b881 MD |
1731 | /* Normal exit, no error */ |
1732 | err = 0; | |
099e26bd DG |
1733 | |
1734 | error: | |
d88aee68 DG |
1735 | /* Clean up wait queue. */ |
1736 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1737 | &wait_queue.head, head) { |
d88aee68 | 1738 | cds_list_del(&wait_node->head); |
f45e313d | 1739 | wait_queue.count--; |
d88aee68 DG |
1740 | free(wait_node); |
1741 | } | |
1742 | ||
099e26bd | 1743 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1744 | if (err) { |
1745 | health_error(); | |
1746 | ERR("Health error occurred in %s", __func__); | |
1747 | } | |
8782cc74 | 1748 | health_unregister(health_sessiond); |
099e26bd DG |
1749 | return NULL; |
1750 | } | |
1751 | ||
1752 | /* | |
1753 | * This thread manage application registration. | |
1754 | */ | |
1755 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1756 | { |
139ac872 | 1757 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1758 | uint32_t revents, nb_fd; |
1759 | struct lttng_poll_event events; | |
099e26bd DG |
1760 | /* |
1761 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1762 | * freed in the manage apps thread. | |
1763 | */ | |
1764 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1765 | |
099e26bd | 1766 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1767 | |
6c71277b | 1768 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1769 | |
6993eeb3 CB |
1770 | if (testpoint(thread_registration_apps)) { |
1771 | goto error_testpoint; | |
1772 | } | |
8ac94142 | 1773 | |
1d4b027a DG |
1774 | ret = lttcomm_listen_unix_sock(apps_sock); |
1775 | if (ret < 0) { | |
76d7553f | 1776 | goto error_listen; |
1d4b027a DG |
1777 | } |
1778 | ||
5eb91c98 DG |
1779 | /* |
1780 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1781 | * more will be added to this poll set. | |
1782 | */ | |
d0b96690 | 1783 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1784 | if (ret < 0) { |
76d7553f | 1785 | goto error_create_poll; |
5eb91c98 | 1786 | } |
273ea72c | 1787 | |
5eb91c98 DG |
1788 | /* Add the application registration socket */ |
1789 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1790 | if (ret < 0) { | |
76d7553f | 1791 | goto error_poll_add; |
5eb91c98 | 1792 | } |
273ea72c | 1793 | |
1d4b027a | 1794 | /* Notify all applications to register */ |
0fdd1e2c DG |
1795 | ret = notify_ust_apps(1); |
1796 | if (ret < 0) { | |
1797 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1798 | "Execution continues but there might be problem for already\n" |
1799 | "running applications that wishes to register."); | |
0fdd1e2c | 1800 | } |
1d4b027a DG |
1801 | |
1802 | while (1) { | |
1803 | DBG("Accepting application registration"); | |
273ea72c DG |
1804 | |
1805 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1806 | restart: |
a78af745 | 1807 | health_poll_entry(); |
5eb91c98 | 1808 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1809 | health_poll_exit(); |
273ea72c | 1810 | if (ret < 0) { |
88f2b785 MD |
1811 | /* |
1812 | * Restart interrupted system call. | |
1813 | */ | |
1814 | if (errno == EINTR) { | |
1815 | goto restart; | |
1816 | } | |
273ea72c DG |
1817 | goto error; |
1818 | } | |
1819 | ||
0d9c5d77 DG |
1820 | nb_fd = ret; |
1821 | ||
5eb91c98 | 1822 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1823 | health_code_update(); |
139ac872 | 1824 | |
5eb91c98 DG |
1825 | /* Fetch once the poll data */ |
1826 | revents = LTTNG_POLL_GETEV(&events, i); | |
1827 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1828 | |
5eb91c98 | 1829 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1830 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1831 | if (ret) { |
139ac872 MD |
1832 | err = 0; |
1833 | goto exit; | |
90014c57 | 1834 | } |
1d4b027a | 1835 | |
5eb91c98 DG |
1836 | /* Event on the registration socket */ |
1837 | if (pollfd == apps_sock) { | |
1838 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1839 | ERR("Register apps socket poll error"); | |
1840 | goto error; | |
1841 | } else if (revents & LPOLLIN) { | |
1842 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1843 | if (sock < 0) { | |
1844 | goto error; | |
1845 | } | |
099e26bd | 1846 | |
16c5c8fa DG |
1847 | /* |
1848 | * Set socket timeout for both receiving and ending. | |
1849 | * app_socket_timeout is in seconds, whereas | |
1850 | * lttcomm_setsockopt_rcv_timeout and | |
1851 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1852 | * parameter. | |
1853 | */ | |
1854 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1855 | app_socket_timeout * 1000); | |
1856 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1857 | app_socket_timeout * 1000); | |
1858 | ||
b662582b DG |
1859 | /* |
1860 | * Set the CLOEXEC flag. Return code is useless because | |
1861 | * either way, the show must go on. | |
1862 | */ | |
1863 | (void) utils_set_fd_cloexec(sock); | |
1864 | ||
5eb91c98 | 1865 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1866 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1867 | if (ust_cmd == NULL) { |
76d7553f | 1868 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1869 | goto error; |
1870 | } | |
1d4b027a | 1871 | |
5eb91c98 DG |
1872 | /* |
1873 | * Using message-based transmissions to ensure we don't | |
1874 | * have to deal with partially received messages. | |
1875 | */ | |
4063050c MD |
1876 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1877 | if (ret < 0) { | |
1878 | ERR("Exhausted file descriptors allowed for applications."); | |
1879 | free(ust_cmd); | |
1880 | ret = close(sock); | |
1881 | if (ret) { | |
1882 | PERROR("close"); | |
1883 | } | |
1884 | sock = -1; | |
1885 | continue; | |
1886 | } | |
d88aee68 | 1887 | |
840cb59c | 1888 | health_code_update(); |
d0b96690 DG |
1889 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1890 | if (ret < 0) { | |
5eb91c98 | 1891 | free(ust_cmd); |
d0b96690 | 1892 | /* Close socket of the application. */ |
76d7553f MD |
1893 | ret = close(sock); |
1894 | if (ret) { | |
1895 | PERROR("close"); | |
1896 | } | |
4063050c | 1897 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1898 | sock = -1; |
5eb91c98 DG |
1899 | continue; |
1900 | } | |
840cb59c | 1901 | health_code_update(); |
099e26bd | 1902 | |
5eb91c98 | 1903 | ust_cmd->sock = sock; |
34a2494f | 1904 | sock = -1; |
099e26bd | 1905 | |
5eb91c98 DG |
1906 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1907 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1908 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1909 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1910 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1911 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1912 | |
5eb91c98 DG |
1913 | /* |
1914 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1915 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1916 | */ |
1917 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1918 | ||
1919 | /* | |
1920 | * Wake the registration queue futex. Implicit memory | |
1921 | * barrier with the exchange in cds_wfq_enqueue. | |
1922 | */ | |
1923 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1924 | } | |
1925 | } | |
90014c57 | 1926 | } |
1d4b027a DG |
1927 | } |
1928 | ||
139ac872 | 1929 | exit: |
1d4b027a | 1930 | error: |
139ac872 | 1931 | if (err) { |
840cb59c | 1932 | health_error(); |
139ac872 MD |
1933 | ERR("Health error occurred in %s", __func__); |
1934 | } | |
139ac872 | 1935 | |
0fdd1e2c DG |
1936 | /* Notify that the registration thread is gone */ |
1937 | notify_ust_apps(0); | |
1938 | ||
a4b35e07 | 1939 | if (apps_sock >= 0) { |
76d7553f MD |
1940 | ret = close(apps_sock); |
1941 | if (ret) { | |
1942 | PERROR("close"); | |
1943 | } | |
a4b35e07 | 1944 | } |
46c3f085 | 1945 | if (sock >= 0) { |
76d7553f MD |
1946 | ret = close(sock); |
1947 | if (ret) { | |
1948 | PERROR("close"); | |
1949 | } | |
4063050c | 1950 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1951 | } |
273ea72c | 1952 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1953 | |
76d7553f | 1954 | error_poll_add: |
5eb91c98 | 1955 | lttng_poll_clean(&events); |
76d7553f MD |
1956 | error_listen: |
1957 | error_create_poll: | |
6993eeb3 | 1958 | error_testpoint: |
76d7553f | 1959 | DBG("UST Registration thread cleanup complete"); |
8782cc74 | 1960 | health_unregister(health_sessiond); |
5eb91c98 | 1961 | |
1d4b027a DG |
1962 | return NULL; |
1963 | } | |
1964 | ||
8c0faa1d | 1965 | /* |
3bd1e081 | 1966 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1967 | * exec or it will fails. |
8c0faa1d | 1968 | */ |
3bd1e081 | 1969 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1970 | { |
a23ec3a7 | 1971 | int ret, clock_ret; |
ee0b0061 DG |
1972 | struct timespec timeout; |
1973 | ||
a23ec3a7 DG |
1974 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1975 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1976 | |
a23ec3a7 DG |
1977 | /* Setup pthread condition */ |
1978 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1979 | if (ret != 0) { | |
1980 | errno = ret; | |
1981 | PERROR("pthread_condattr_init consumer data"); | |
1982 | goto error; | |
1983 | } | |
1984 | ||
1985 | /* | |
1986 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1987 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1988 | * for a more details and how we noticed it. | |
1989 | */ | |
1990 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1991 | if (ret != 0) { | |
1992 | errno = ret; | |
1993 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1994 | goto error; |
1995 | } | |
8c0faa1d | 1996 | |
a23ec3a7 DG |
1997 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1998 | if (ret != 0) { | |
1999 | errno = ret; | |
2000 | PERROR("pthread_cond_init consumer data"); | |
2001 | goto error; | |
2002 | } | |
2003 | ||
2004 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2005 | consumer_data); | |
8c0faa1d | 2006 | if (ret != 0) { |
3bd1e081 | 2007 | PERROR("pthread_create consumer"); |
ee0b0061 | 2008 | ret = -1; |
8c0faa1d DG |
2009 | goto error; |
2010 | } | |
2011 | ||
a23ec3a7 DG |
2012 | /* We are about to wait on a pthread condition */ |
2013 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2014 | ||
ee0b0061 | 2015 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2016 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2017 | /* | |
2018 | * Set the timeout for the condition timed wait even if the clock gettime | |
2019 | * call fails since we might loop on that call and we want to avoid to | |
2020 | * increment the timeout too many times. | |
2021 | */ | |
2022 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2023 | ||
2024 | /* | |
2025 | * The following loop COULD be skipped in some conditions so this is why we | |
2026 | * set ret to 0 in order to make sure at least one round of the loop is | |
2027 | * done. | |
2028 | */ | |
2029 | ret = 0; | |
2030 | ||
2031 | /* | |
2032 | * Loop until the condition is reached or when a timeout is reached. Note | |
2033 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2034 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2035 | * possible. This loop does not take any chances and works with both of | |
2036 | * them. | |
2037 | */ | |
2038 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2039 | if (clock_ret < 0) { | |
2040 | PERROR("clock_gettime spawn consumer"); | |
2041 | /* Infinite wait for the consumerd thread to be ready */ | |
2042 | ret = pthread_cond_wait(&consumer_data->cond, | |
2043 | &consumer_data->cond_mutex); | |
2044 | } else { | |
2045 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2046 | &consumer_data->cond_mutex, &timeout); | |
2047 | } | |
ee0b0061 | 2048 | } |
8c0faa1d | 2049 | |
a23ec3a7 DG |
2050 | /* Release the pthread condition */ |
2051 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2052 | ||
2053 | if (ret != 0) { | |
2054 | errno = ret; | |
2055 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
2056 | /* |
2057 | * Call has timed out so we kill the kconsumerd_thread and return | |
2058 | * an error. | |
2059 | */ | |
a23ec3a7 DG |
2060 | ERR("Condition timed out. The consumer thread was never ready." |
2061 | " Killing it"); | |
3bd1e081 | 2062 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 2063 | if (ret < 0) { |
3bd1e081 | 2064 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2065 | } |
2066 | } else { | |
a23ec3a7 | 2067 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
2068 | } |
2069 | goto error; | |
2070 | } | |
2071 | ||
3bd1e081 MD |
2072 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2073 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2074 | ERR("Consumerd did not start"); |
3bd1e081 | 2075 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2076 | goto error; |
2077 | } | |
3bd1e081 | 2078 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2079 | |
8c0faa1d DG |
2080 | return 0; |
2081 | ||
2082 | error: | |
2083 | return ret; | |
2084 | } | |
2085 | ||
d9800920 | 2086 | /* |
3bd1e081 | 2087 | * Join consumer thread |
d9800920 | 2088 | */ |
3bd1e081 | 2089 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2090 | { |
2091 | void *status; | |
cf3af59e | 2092 | |
e8209f6b DG |
2093 | /* Consumer pid must be a real one. */ |
2094 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2095 | int ret; |
3bd1e081 | 2096 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2097 | if (ret) { |
3bd1e081 | 2098 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2099 | return ret; |
2100 | } | |
3bd1e081 | 2101 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2102 | } else { |
2103 | return 0; | |
2104 | } | |
2105 | } | |
2106 | ||
8c0faa1d | 2107 | /* |
3bd1e081 | 2108 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2109 | * |
d063d709 | 2110 | * Return pid if successful else -1. |
8c0faa1d | 2111 | */ |
3bd1e081 | 2112 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2113 | { |
2114 | int ret; | |
2115 | pid_t pid; | |
94c55f17 | 2116 | const char *consumer_to_use; |
53086306 | 2117 | const char *verbosity; |
94c55f17 | 2118 | struct stat st; |
8c0faa1d | 2119 | |
3bd1e081 | 2120 | DBG("Spawning consumerd"); |
c49dc785 | 2121 | |
8c0faa1d DG |
2122 | pid = fork(); |
2123 | if (pid == 0) { | |
2124 | /* | |
3bd1e081 | 2125 | * Exec consumerd. |
8c0faa1d | 2126 | */ |
daee5345 | 2127 | if (opt_verbose_consumer) { |
53086306 DG |
2128 | verbosity = "--verbose"; |
2129 | } else { | |
2130 | verbosity = "--quiet"; | |
2131 | } | |
3bd1e081 MD |
2132 | switch (consumer_data->type) { |
2133 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2134 | /* |
c7704d57 DG |
2135 | * Find out which consumerd to execute. We will first try the |
2136 | * 64-bit path, then the sessiond's installation directory, and | |
2137 | * fallback on the 32-bit one, | |
94c55f17 | 2138 | */ |
63a799e8 AM |
2139 | DBG3("Looking for a kernel consumer at these locations:"); |
2140 | DBG3(" 1) %s", consumerd64_bin); | |
2141 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2142 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2143 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2144 | DBG3("Found location #1"); |
94c55f17 | 2145 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2146 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2147 | DBG3("Found location #2"); |
94c55f17 | 2148 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2149 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2150 | DBG3("Found location #3"); |
eb1e0bd4 | 2151 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2152 | } else { |
63a799e8 | 2153 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2154 | break; |
2155 | } | |
2156 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
2157 | execl(consumer_to_use, | |
2158 | "lttng-consumerd", verbosity, "-k", | |
2159 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2160 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2161 | "--group", tracing_group_name, |
94c55f17 | 2162 | NULL); |
3bd1e081 | 2163 | break; |
7753dea8 MD |
2164 | case LTTNG_CONSUMER64_UST: |
2165 | { | |
b1e0b6b6 | 2166 | char *tmpnew = NULL; |
8f4905da MD |
2167 | |
2168 | if (consumerd64_libdir[0] != '\0') { | |
2169 | char *tmp; | |
2170 | size_t tmplen; | |
2171 | ||
2172 | tmp = getenv("LD_LIBRARY_PATH"); | |
2173 | if (!tmp) { | |
2174 | tmp = ""; | |
2175 | } | |
2176 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2177 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2178 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2179 | if (!tmpnew) { | |
2180 | ret = -ENOMEM; | |
2181 | goto error; | |
2182 | } | |
2183 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2184 | strcat(tmpnew, consumerd64_libdir); | |
2185 | if (tmp[0] != '\0') { | |
2186 | strcat(tmpnew, ":"); | |
2187 | strcat(tmpnew, tmp); | |
2188 | } | |
2189 | ret = putenv(tmpnew); | |
2190 | if (ret) { | |
2191 | ret = -errno; | |
c6f76da9 | 2192 | free(tmpnew); |
8f4905da MD |
2193 | goto error; |
2194 | } | |
2195 | } | |
94c55f17 | 2196 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2197 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2198 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2199 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2200 | "--group", tracing_group_name, |
7753dea8 | 2201 | NULL); |
8f4905da MD |
2202 | if (consumerd64_libdir[0] != '\0') { |
2203 | free(tmpnew); | |
2204 | } | |
2205 | if (ret) { | |
2206 | goto error; | |
2207 | } | |
3bd1e081 | 2208 | break; |
7753dea8 MD |
2209 | } |
2210 | case LTTNG_CONSUMER32_UST: | |
2211 | { | |
937dde8e | 2212 | char *tmpnew = NULL; |
8f4905da MD |
2213 | |
2214 | if (consumerd32_libdir[0] != '\0') { | |
2215 | char *tmp; | |
2216 | size_t tmplen; | |
2217 | ||
2218 | tmp = getenv("LD_LIBRARY_PATH"); | |
2219 | if (!tmp) { | |
2220 | tmp = ""; | |
2221 | } | |
2222 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2223 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2224 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2225 | if (!tmpnew) { | |
2226 | ret = -ENOMEM; | |
2227 | goto error; | |
2228 | } | |
2229 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2230 | strcat(tmpnew, consumerd32_libdir); | |
2231 | if (tmp[0] != '\0') { | |
2232 | strcat(tmpnew, ":"); | |
2233 | strcat(tmpnew, tmp); | |
2234 | } | |
2235 | ret = putenv(tmpnew); | |
2236 | if (ret) { | |
2237 | ret = -errno; | |
c6f76da9 | 2238 | free(tmpnew); |
8f4905da MD |
2239 | goto error; |
2240 | } | |
2241 | } | |
94c55f17 | 2242 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2243 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2244 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2245 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2246 | "--group", tracing_group_name, |
7753dea8 | 2247 | NULL); |
8f4905da MD |
2248 | if (consumerd32_libdir[0] != '\0') { |
2249 | free(tmpnew); | |
2250 | } | |
2251 | if (ret) { | |
2252 | goto error; | |
2253 | } | |
7753dea8 MD |
2254 | break; |
2255 | } | |
3bd1e081 | 2256 | default: |
76d7553f | 2257 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2258 | exit(EXIT_FAILURE); |
2259 | } | |
8c0faa1d | 2260 | if (errno != 0) { |
76d7553f | 2261 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2262 | } |
2263 | exit(EXIT_FAILURE); | |
2264 | } else if (pid > 0) { | |
2265 | ret = pid; | |
8c0faa1d | 2266 | } else { |
76d7553f | 2267 | PERROR("start consumer fork"); |
8c0faa1d | 2268 | ret = -errno; |
8c0faa1d | 2269 | } |
8f4905da | 2270 | error: |
8c0faa1d DG |
2271 | return ret; |
2272 | } | |
2273 | ||
693bd40b | 2274 | /* |
3bd1e081 | 2275 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2276 | */ |
3bd1e081 | 2277 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2278 | { |
c617c0c6 | 2279 | int ret; |
edb8b045 DG |
2280 | |
2281 | /* | |
2282 | * Set the listen() state on the socket since there is a possible race | |
2283 | * between the exec() of the consumer daemon and this call if place in the | |
2284 | * consumer thread. See bug #366 for more details. | |
2285 | */ | |
2286 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2287 | if (ret < 0) { | |
2288 | goto error; | |
2289 | } | |
693bd40b | 2290 | |
3bd1e081 MD |
2291 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2292 | if (consumer_data->pid != 0) { | |
2293 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2294 | goto end; |
2295 | } | |
693bd40b | 2296 | |
3bd1e081 | 2297 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2298 | if (ret < 0) { |
3bd1e081 MD |
2299 | ERR("Spawning consumerd failed"); |
2300 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2301 | goto error; |
693bd40b | 2302 | } |
c49dc785 | 2303 | |
3bd1e081 MD |
2304 | /* Setting up the consumer_data pid */ |
2305 | consumer_data->pid = ret; | |
48842b30 | 2306 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2307 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2308 | |
3bd1e081 MD |
2309 | DBG2("Spawning consumer control thread"); |
2310 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2311 | if (ret < 0) { |
3bd1e081 | 2312 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2313 | goto error; |
2314 | } | |
2315 | ||
c49dc785 | 2316 | end: |
693bd40b DG |
2317 | return 0; |
2318 | ||
2319 | error: | |
331744e3 | 2320 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2321 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2322 | int err; |
2323 | ||
edb8b045 DG |
2324 | err = close(consumer_data->err_sock); |
2325 | if (err < 0) { | |
2326 | PERROR("close consumer data error socket"); | |
2327 | } | |
2328 | } | |
693bd40b DG |
2329 | return ret; |
2330 | } | |
2331 | ||
b73401da | 2332 | /* |
096102bd | 2333 | * Setup necessary data for kernel tracer action. |
b73401da | 2334 | */ |
096102bd | 2335 | static int init_kernel_tracer(void) |
b73401da DG |
2336 | { |
2337 | int ret; | |
b73401da | 2338 | |
096102bd DG |
2339 | /* Modprobe lttng kernel modules */ |
2340 | ret = modprobe_lttng_control(); | |
b73401da | 2341 | if (ret < 0) { |
b73401da DG |
2342 | goto error; |
2343 | } | |
2344 | ||
096102bd DG |
2345 | /* Open debugfs lttng */ |
2346 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2347 | if (kernel_tracer_fd < 0) { | |
2348 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2349 | ret = -1; |
2350 | goto error_open; | |
54d01ffb DG |
2351 | } |
2352 | ||
2f77fc4b DG |
2353 | /* Validate kernel version */ |
2354 | ret = kernel_validate_version(kernel_tracer_fd); | |
2355 | if (ret < 0) { | |
2356 | goto error_version; | |
b551a063 | 2357 | } |
54d01ffb | 2358 | |
2f77fc4b DG |
2359 | ret = modprobe_lttng_data(); |
2360 | if (ret < 0) { | |
2361 | goto error_modules; | |
54d01ffb DG |
2362 | } |
2363 | ||
2f77fc4b DG |
2364 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2365 | return 0; | |
2366 | ||
2367 | error_version: | |
2368 | modprobe_remove_lttng_control(); | |
2369 | ret = close(kernel_tracer_fd); | |
2370 | if (ret) { | |
2371 | PERROR("close"); | |
b551a063 | 2372 | } |
2f77fc4b | 2373 | kernel_tracer_fd = -1; |
f73fabfd | 2374 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2375 | |
2f77fc4b DG |
2376 | error_modules: |
2377 | ret = close(kernel_tracer_fd); | |
2378 | if (ret) { | |
2379 | PERROR("close"); | |
b551a063 | 2380 | } |
54d01ffb | 2381 | |
2f77fc4b DG |
2382 | error_open: |
2383 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2384 | |
2385 | error: | |
2f77fc4b DG |
2386 | WARN("No kernel tracer available"); |
2387 | kernel_tracer_fd = -1; | |
2388 | if (!is_root) { | |
f73fabfd | 2389 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2390 | } else { |
f73fabfd | 2391 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2392 | } |
54d01ffb DG |
2393 | } |
2394 | ||
2f77fc4b | 2395 | |
54d01ffb | 2396 | /* |
2f77fc4b DG |
2397 | * Copy consumer output from the tracing session to the domain session. The |
2398 | * function also applies the right modification on a per domain basis for the | |
2399 | * trace files destination directory. | |
36b588ed MD |
2400 | * |
2401 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2402 | */ |
2f77fc4b | 2403 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2404 | { |
2405 | int ret; | |
2f77fc4b DG |
2406 | const char *dir_name; |
2407 | struct consumer_output *consumer; | |
2408 | ||
2409 | assert(session); | |
2410 | assert(session->consumer); | |
54d01ffb | 2411 | |
b551a063 DG |
2412 | switch (domain) { |
2413 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2414 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2415 | /* |
2416 | * XXX: We should audit the session creation and what this function | |
2417 | * does "extra" in order to avoid a destroy since this function is used | |
2418 | * in the domain session creation (kernel and ust) only. Same for UST | |
2419 | * domain. | |
2420 | */ | |
2421 | if (session->kernel_session->consumer) { | |
2422 | consumer_destroy_output(session->kernel_session->consumer); | |
2423 | } | |
2f77fc4b DG |
2424 | session->kernel_session->consumer = |
2425 | consumer_copy_output(session->consumer); | |
2426 | /* Ease our life a bit for the next part */ | |
2427 | consumer = session->kernel_session->consumer; | |
2428 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2429 | break; |
f20baf8e | 2430 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2431 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2432 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2433 | if (session->ust_session->consumer) { |
2434 | consumer_destroy_output(session->ust_session->consumer); | |
2435 | } | |
2f77fc4b DG |
2436 | session->ust_session->consumer = |
2437 | consumer_copy_output(session->consumer); | |
2438 | /* Ease our life a bit for the next part */ | |
2439 | consumer = session->ust_session->consumer; | |
2440 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2441 | break; |
2442 | default: | |
f73fabfd | 2443 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2444 | goto error; |
2445 | } | |
2446 | ||
2f77fc4b | 2447 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2448 | strncat(consumer->subdir, dir_name, |
2449 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2450 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2451 | ||
f73fabfd | 2452 | ret = LTTNG_OK; |
54d01ffb DG |
2453 | |
2454 | error: | |
2455 | return ret; | |
2456 | } | |
2457 | ||
00e2e675 | 2458 | /* |
2f77fc4b | 2459 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2460 | * |
2461 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2462 | */ |
2f77fc4b DG |
2463 | static int create_ust_session(struct ltt_session *session, |
2464 | struct lttng_domain *domain) | |
00e2e675 DG |
2465 | { |
2466 | int ret; | |
2f77fc4b | 2467 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2468 | |
a4b92340 | 2469 | assert(session); |
2f77fc4b DG |
2470 | assert(domain); |
2471 | assert(session->consumer); | |
a4b92340 | 2472 | |
2f77fc4b | 2473 | switch (domain->type) { |
f20baf8e | 2474 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2475 | case LTTNG_DOMAIN_UST: |
2476 | break; | |
2477 | default: | |
2478 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2479 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2480 | goto error; |
2481 | } | |
2482 | ||
2f77fc4b DG |
2483 | DBG("Creating UST session"); |
2484 | ||
dec56f6c | 2485 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2486 | if (lus == NULL) { |
f73fabfd | 2487 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2488 | goto error; |
2489 | } | |
2490 | ||
2f77fc4b DG |
2491 | lus->uid = session->uid; |
2492 | lus->gid = session->gid; | |
2bba9e53 | 2493 | lus->output_traces = session->output_traces; |
27babd3a | 2494 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2495 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2496 | session->ust_session = lus; |
00e2e675 | 2497 | |
2f77fc4b DG |
2498 | /* Copy session output to the newly created UST session */ |
2499 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2500 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2501 | goto error; |
2502 | } | |
2503 | ||
f73fabfd | 2504 | return LTTNG_OK; |
00e2e675 DG |
2505 | |
2506 | error: | |
2f77fc4b DG |
2507 | free(lus); |
2508 | session->ust_session = NULL; | |
00e2e675 DG |
2509 | return ret; |
2510 | } | |
2511 | ||
2512 | /* | |
2f77fc4b | 2513 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2514 | */ |
2f77fc4b | 2515 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2516 | { |
2517 | int ret; | |
a4b92340 | 2518 | |
2f77fc4b | 2519 | DBG("Creating kernel session"); |
00e2e675 | 2520 | |
2f77fc4b DG |
2521 | ret = kernel_create_session(session, kernel_tracer_fd); |
2522 | if (ret < 0) { | |
f73fabfd | 2523 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2524 | goto error; |
2525 | } | |
2526 | ||
2f77fc4b DG |
2527 | /* Code flow safety */ |
2528 | assert(session->kernel_session); | |
2529 | ||
2530 | /* Copy session output to the newly created Kernel session */ | |
2531 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2532 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2533 | goto error; |
2534 | } | |
2535 | ||
2f77fc4b DG |
2536 | /* Create directory(ies) on local filesystem. */ |
2537 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2538 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2539 | ret = run_as_mkdir_recursive( | |
2540 | session->kernel_session->consumer->dst.trace_path, | |
2541 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2542 | if (ret < 0) { | |
2543 | if (ret != -EEXIST) { | |
2544 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2545 | goto error; |
2546 | } | |
00e2e675 | 2547 | } |
2f77fc4b | 2548 | } |
00e2e675 | 2549 | |
2f77fc4b DG |
2550 | session->kernel_session->uid = session->uid; |
2551 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2552 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2553 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2554 | |
f73fabfd | 2555 | return LTTNG_OK; |
00e2e675 | 2556 | |
2f77fc4b DG |
2557 | error: |
2558 | trace_kernel_destroy_session(session->kernel_session); | |
2559 | session->kernel_session = NULL; | |
2560 | return ret; | |
2561 | } | |
00e2e675 | 2562 | |
2f77fc4b DG |
2563 | /* |
2564 | * Count number of session permitted by uid/gid. | |
2565 | */ | |
2566 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2567 | { | |
2568 | unsigned int i = 0; | |
2569 | struct ltt_session *session; | |
07424f16 | 2570 | |
2f77fc4b DG |
2571 | DBG("Counting number of available session for UID %d GID %d", |
2572 | uid, gid); | |
2573 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2574 | /* |
2f77fc4b | 2575 | * Only list the sessions the user can control. |
00e2e675 | 2576 | */ |
2f77fc4b DG |
2577 | if (!session_access_ok(session, uid, gid)) { |
2578 | continue; | |
2579 | } | |
2580 | i++; | |
a4b92340 | 2581 | } |
2f77fc4b | 2582 | return i; |
00e2e675 DG |
2583 | } |
2584 | ||
54d01ffb DG |
2585 | /* |
2586 | * Process the command requested by the lttng client within the command | |
2587 | * context structure. This function make sure that the return structure (llm) | |
2588 | * is set and ready for transmission before returning. | |
2589 | * | |
2590 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2591 | * |
2592 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2593 | * |
2594 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2595 | */ |
53a80697 MD |
2596 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2597 | int *sock_error) | |
54d01ffb | 2598 | { |
f73fabfd | 2599 | int ret = LTTNG_OK; |
44d3bd01 | 2600 | int need_tracing_session = 1; |
2e09ba09 | 2601 | int need_domain; |
54d01ffb DG |
2602 | |
2603 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2604 | ||
53a80697 MD |
2605 | *sock_error = 0; |
2606 | ||
2e09ba09 MD |
2607 | switch (cmd_ctx->lsm->cmd_type) { |
2608 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2609 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2610 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2611 | case LTTNG_DESTROY_SESSION: |
2612 | case LTTNG_LIST_SESSIONS: | |
2613 | case LTTNG_LIST_DOMAINS: | |
2614 | case LTTNG_START_TRACE: | |
2615 | case LTTNG_STOP_TRACE: | |
6d805429 | 2616 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2617 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2618 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2619 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2620 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2621 | need_domain = 0; |
3aace903 | 2622 | break; |
2e09ba09 MD |
2623 | default: |
2624 | need_domain = 1; | |
2625 | } | |
2626 | ||
2627 | if (opt_no_kernel && need_domain | |
2628 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2629 | if (!is_root) { |
f73fabfd | 2630 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2631 | } else { |
f73fabfd | 2632 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2633 | } |
4fba7219 DG |
2634 | goto error; |
2635 | } | |
2636 | ||
8d3113b2 DG |
2637 | /* Deny register consumer if we already have a spawned consumer. */ |
2638 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2639 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2640 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2641 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2642 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2643 | goto error; |
2644 | } | |
2645 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2646 | } | |
2647 | ||
54d01ffb DG |
2648 | /* |
2649 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2650 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2651 | * command. |
2652 | */ | |
2653 | switch(cmd_ctx->lsm->cmd_type) { | |
2654 | case LTTNG_LIST_SESSIONS: | |
2655 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2656 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2657 | case LTTNG_LIST_DOMAINS: |
2658 | case LTTNG_LIST_CHANNELS: | |
2659 | case LTTNG_LIST_EVENTS: | |
2660 | break; | |
2661 | default: | |
2662 | /* Setup lttng message with no payload */ | |
2663 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2664 | if (ret < 0) { | |
2665 | /* This label does not try to unlock the session */ | |
2666 | goto init_setup_error; | |
2667 | } | |
2668 | } | |
2669 | ||
2670 | /* Commands that DO NOT need a session. */ | |
2671 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2672 | case LTTNG_CREATE_SESSION: |
27babd3a | 2673 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2674 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2675 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2676 | case LTTNG_LIST_SESSIONS: |
2677 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2678 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2679 | need_tracing_session = 0; |
54d01ffb DG |
2680 | break; |
2681 | default: | |
2682 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2683 | /* |
2684 | * We keep the session list lock across _all_ commands | |
2685 | * for now, because the per-session lock does not | |
2686 | * handle teardown properly. | |
2687 | */ | |
74babd95 | 2688 | session_lock_list(); |
54d01ffb DG |
2689 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2690 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2691 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2692 | goto error; |
2693 | } else { | |
2694 | /* Acquire lock for the session */ | |
2695 | session_lock(cmd_ctx->session); | |
2696 | } | |
2697 | break; | |
2698 | } | |
b389abbe | 2699 | |
2e09ba09 MD |
2700 | if (!need_domain) { |
2701 | goto skip_domain; | |
2702 | } | |
a4b92340 | 2703 | |
54d01ffb DG |
2704 | /* |
2705 | * Check domain type for specific "pre-action". | |
2706 | */ | |
2707 | switch (cmd_ctx->lsm->domain.type) { | |
2708 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2709 | if (!is_root) { |
f73fabfd | 2710 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2711 | goto error; |
2712 | } | |
2713 | ||
54d01ffb | 2714 | /* Kernel tracer check */ |
a4b35e07 | 2715 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2716 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2717 | ret = init_kernel_tracer(); |
2718 | if (ret != 0) { | |
54d01ffb DG |
2719 | goto error; |
2720 | } | |
2721 | } | |
5eb91c98 | 2722 | |
5c827ce0 DG |
2723 | /* Consumer is in an ERROR state. Report back to client */ |
2724 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2725 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2726 | goto error; |
2727 | } | |
2728 | ||
54d01ffb | 2729 | /* Need a session for kernel command */ |
44d3bd01 | 2730 | if (need_tracing_session) { |
54d01ffb | 2731 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2732 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2733 | if (ret < 0) { |
f73fabfd | 2734 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2735 | goto error; |
2736 | } | |
b389abbe | 2737 | } |
7d29a247 | 2738 | |
54d01ffb | 2739 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2740 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2741 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2742 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2743 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2744 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2745 | if (ret < 0) { |
f73fabfd | 2746 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2747 | goto error; |
950131af | 2748 | } |
5c827ce0 | 2749 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2750 | } else { |
2751 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2752 | } |
173af62f | 2753 | |
a4b92340 DG |
2754 | /* |
2755 | * The consumer was just spawned so we need to add the socket to | |
2756 | * the consumer output of the session if exist. | |
2757 | */ | |
2758 | ret = consumer_create_socket(&kconsumer_data, | |
2759 | cmd_ctx->session->kernel_session->consumer); | |
2760 | if (ret < 0) { | |
2761 | goto error; | |
173af62f | 2762 | } |
0d0c377a | 2763 | } |
5c827ce0 | 2764 | |
54d01ffb | 2765 | break; |
b9dfb167 | 2766 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2767 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2768 | { |
b51ec5b4 MD |
2769 | if (!ust_app_supported()) { |
2770 | ret = LTTNG_ERR_NO_UST; | |
2771 | goto error; | |
2772 | } | |
5c827ce0 DG |
2773 | /* Consumer is in an ERROR state. Report back to client */ |
2774 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2775 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2776 | goto error; |
2777 | } | |
2778 | ||
44d3bd01 | 2779 | if (need_tracing_session) { |
a4b92340 | 2780 | /* Create UST session if none exist. */ |
f6a9efaa | 2781 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2782 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2783 | &cmd_ctx->lsm->domain); |
f73fabfd | 2784 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2785 | goto error; |
2786 | } | |
2787 | } | |
00e2e675 | 2788 | |
7753dea8 MD |
2789 | /* Start the UST consumer daemons */ |
2790 | /* 64-bit */ | |
2791 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2792 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2793 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2794 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2795 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2796 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2797 | if (ret < 0) { |
f73fabfd | 2798 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2799 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2800 | goto error; |
2801 | } | |
48842b30 | 2802 | |
173af62f | 2803 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2804 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2805 | } else { |
7753dea8 MD |
2806 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2807 | } | |
173af62f DG |
2808 | |
2809 | /* | |
2810 | * Setup socket for consumer 64 bit. No need for atomic access | |
2811 | * since it was set above and can ONLY be set in this thread. | |
2812 | */ | |
a4b92340 DG |
2813 | ret = consumer_create_socket(&ustconsumer64_data, |
2814 | cmd_ctx->session->ust_session->consumer); | |
2815 | if (ret < 0) { | |
2816 | goto error; | |
173af62f DG |
2817 | } |
2818 | ||
7753dea8 | 2819 | /* 32-bit */ |
fc7a59ce | 2820 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2821 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2822 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2823 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2824 | ret = start_consumerd(&ustconsumer32_data); | |
2825 | if (ret < 0) { | |
f73fabfd | 2826 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2827 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2828 | goto error; |
2829 | } | |
5c827ce0 | 2830 | |
173af62f | 2831 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2832 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2833 | } else { |
2834 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2835 | } |
173af62f DG |
2836 | |
2837 | /* | |
2838 | * Setup socket for consumer 64 bit. No need for atomic access | |
2839 | * since it was set above and can ONLY be set in this thread. | |
2840 | */ | |
a4b92340 DG |
2841 | ret = consumer_create_socket(&ustconsumer32_data, |
2842 | cmd_ctx->session->ust_session->consumer); | |
2843 | if (ret < 0) { | |
2844 | goto error; | |
173af62f | 2845 | } |
44d3bd01 DG |
2846 | } |
2847 | break; | |
48842b30 | 2848 | } |
54d01ffb | 2849 | default: |
54d01ffb DG |
2850 | break; |
2851 | } | |
2e09ba09 | 2852 | skip_domain: |
33a2b854 | 2853 | |
5c827ce0 DG |
2854 | /* Validate consumer daemon state when start/stop trace command */ |
2855 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2856 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2857 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 2858 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
2859 | case LTTNG_DOMAIN_UST: |
2860 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2861 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2862 | goto error; |
2863 | } | |
2864 | break; | |
2865 | case LTTNG_DOMAIN_KERNEL: | |
2866 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2867 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2868 | goto error; |
2869 | } | |
2870 | break; | |
2871 | } | |
2872 | } | |
2873 | ||
8e0af1b4 MD |
2874 | /* |
2875 | * Check that the UID or GID match that of the tracing session. | |
2876 | * The root user can interact with all sessions. | |
2877 | */ | |
2878 | if (need_tracing_session) { | |
2879 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2880 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2881 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2882 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2883 | goto error; |
2884 | } | |
2885 | } | |
2886 | ||
ffe60014 DG |
2887 | /* |
2888 | * Send relayd information to consumer as soon as we have a domain and a | |
2889 | * session defined. | |
2890 | */ | |
2891 | if (cmd_ctx->session && need_domain) { | |
2892 | /* | |
2893 | * Setup relayd if not done yet. If the relayd information was already | |
2894 | * sent to the consumer, this call will gracefully return. | |
2895 | */ | |
2896 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2897 | if (ret != LTTNG_OK) { | |
2898 | goto error; | |
2899 | } | |
2900 | } | |
2901 | ||
54d01ffb DG |
2902 | /* Process by command type */ |
2903 | switch (cmd_ctx->lsm->cmd_type) { | |
2904 | case LTTNG_ADD_CONTEXT: | |
2905 | { | |
2906 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2907 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2908 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2909 | break; |
2910 | } | |
2911 | case LTTNG_DISABLE_CHANNEL: | |
2912 | { | |
2913 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2914 | cmd_ctx->lsm->u.disable.channel_name); | |
2915 | break; | |
2916 | } | |
2917 | case LTTNG_DISABLE_EVENT: | |
2918 | { | |
2919 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2920 | cmd_ctx->lsm->u.disable.channel_name, | |
2921 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2922 | break; |
2923 | } | |
54d01ffb DG |
2924 | case LTTNG_DISABLE_ALL_EVENT: |
2925 | { | |
2bdd86d4 | 2926 | DBG("Disabling all events"); |
54d01ffb DG |
2927 | |
2928 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2929 | cmd_ctx->lsm->u.disable.channel_name); | |
2930 | break; | |
2931 | } | |
2932 | case LTTNG_ENABLE_CHANNEL: | |
2933 | { | |
7972aab2 | 2934 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2935 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2936 | break; |
2937 | } | |
2938 | case LTTNG_ENABLE_EVENT: | |
2939 | { | |
882ef835 JI |
2940 | struct lttng_event_exclusion *exclusion = NULL; |
2941 | struct lttng_filter_bytecode *bytecode = NULL; | |
2942 | ||
67676bd8 DG |
2943 | /* Handle exclusion events and receive it from the client. */ |
2944 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
2945 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
2946 | ||
2947 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
2948 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
2949 | if (!exclusion) { | |
2950 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
2951 | goto error; | |
882ef835 | 2952 | } |
882ef835 | 2953 | |
67676bd8 DG |
2954 | DBG("Receiving var len exclusion event list from client ..."); |
2955 | exclusion->count = count; | |
2956 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
2957 | count * LTTNG_SYMBOL_NAME_LEN); | |
2958 | if (ret <= 0) { | |
2959 | DBG("Nothing recv() from client var len data... continuing"); | |
2960 | *sock_error = 1; | |
2961 | free(exclusion); | |
2962 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
2963 | goto error; | |
2964 | } | |
2965 | } | |
2966 | ||
2967 | /* Handle filter and get bytecode from client. */ | |
2968 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
2969 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
2970 | ||
2971 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
2972 | ret = LTTNG_ERR_FILTER_INVAL; | |
2973 | free(exclusion); | |
2974 | goto error; | |
2975 | } | |
2976 | ||
2977 | bytecode = zmalloc(bytecode_len); | |
2978 | if (!bytecode) { | |
2979 | free(exclusion); | |
2980 | ret = LTTNG_ERR_FILTER_NOMEM; | |
2981 | goto error; | |
882ef835 JI |
2982 | } |
2983 | ||
67676bd8 DG |
2984 | /* Receive var. len. data */ |
2985 | DBG("Receiving var len filter's bytecode from client ..."); | |
2986 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
2987 | if (ret <= 0) { | |
2988 | DBG("Nothing recv() from client car len data... continuing"); | |
2989 | *sock_error = 1; | |
2990 | free(bytecode); | |
2991 | free(exclusion); | |
2992 | ret = LTTNG_ERR_FILTER_INVAL; | |
2993 | goto error; | |
2994 | } | |
2995 | ||
2996 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
2997 | free(bytecode); | |
2998 | free(exclusion); | |
2999 | ret = LTTNG_ERR_FILTER_INVAL; | |
3000 | goto error; | |
3001 | } | |
882ef835 | 3002 | } |
67676bd8 DG |
3003 | |
3004 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3005 | cmd_ctx->lsm->u.enable.channel_name, | |
3006 | &cmd_ctx->lsm->u.enable.event, bytecode, exclusion, | |
3007 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3008 | break; |
3009 | } | |
3010 | case LTTNG_ENABLE_ALL_EVENT: | |
3011 | { | |
2bdd86d4 | 3012 | DBG("Enabling all events"); |
54d01ffb | 3013 | |
7972aab2 | 3014 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3015 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 3016 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
3017 | break; |
3018 | } | |
052da939 | 3019 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3020 | { |
9f19cc17 | 3021 | struct lttng_event *events; |
54d01ffb | 3022 | ssize_t nb_events; |
052da939 | 3023 | |
54d01ffb DG |
3024 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3025 | if (nb_events < 0) { | |
f73fabfd | 3026 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3027 | ret = -nb_events; |
3028 | goto error; | |
2ef84c95 DG |
3029 | } |
3030 | ||
3031 | /* | |
3032 | * Setup lttng message with payload size set to the event list size in | |
3033 | * bytes and then copy list into the llm payload. | |
3034 | */ | |
052da939 | 3035 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3036 | if (ret < 0) { |
052da939 | 3037 | free(events); |
2ef84c95 DG |
3038 | goto setup_error; |
3039 | } | |
3040 | ||
3041 | /* Copy event list into message payload */ | |
9f19cc17 | 3042 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3043 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3044 | |
9f19cc17 | 3045 | free(events); |
2ef84c95 | 3046 | |
f73fabfd | 3047 | ret = LTTNG_OK; |
2ef84c95 DG |
3048 | break; |
3049 | } | |
f37d259d MD |
3050 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3051 | { | |
3052 | struct lttng_event_field *fields; | |
3053 | ssize_t nb_fields; | |
3054 | ||
a4b92340 DG |
3055 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3056 | &fields); | |
f37d259d | 3057 | if (nb_fields < 0) { |
f73fabfd | 3058 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3059 | ret = -nb_fields; |
3060 | goto error; | |
3061 | } | |
3062 | ||
3063 | /* | |
3064 | * Setup lttng message with payload size set to the event list size in | |
3065 | * bytes and then copy list into the llm payload. | |
3066 | */ | |
a4b92340 DG |
3067 | ret = setup_lttng_msg(cmd_ctx, |
3068 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3069 | if (ret < 0) { |
3070 | free(fields); | |
3071 | goto setup_error; | |
3072 | } | |
3073 | ||
3074 | /* Copy event list into message payload */ | |
3075 | memcpy(cmd_ctx->llm->payload, fields, | |
3076 | sizeof(struct lttng_event_field) * nb_fields); | |
3077 | ||
3078 | free(fields); | |
3079 | ||
f73fabfd | 3080 | ret = LTTNG_OK; |
f37d259d MD |
3081 | break; |
3082 | } | |
00e2e675 DG |
3083 | case LTTNG_SET_CONSUMER_URI: |
3084 | { | |
a4b92340 DG |
3085 | size_t nb_uri, len; |
3086 | struct lttng_uri *uris; | |
3087 | ||
3088 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3089 | len = nb_uri * sizeof(struct lttng_uri); | |
3090 | ||
3091 | if (nb_uri == 0) { | |
f73fabfd | 3092 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3093 | goto error; |
3094 | } | |
3095 | ||
3096 | uris = zmalloc(len); | |
3097 | if (uris == NULL) { | |
f73fabfd | 3098 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3099 | goto error; |
3100 | } | |
3101 | ||
3102 | /* Receive variable len data */ | |
77c7c900 | 3103 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3104 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3105 | if (ret <= 0) { | |
3106 | DBG("No URIs received from client... continuing"); | |
3107 | *sock_error = 1; | |
f73fabfd | 3108 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3109 | free(uris); |
a4b92340 DG |
3110 | goto error; |
3111 | } | |
3112 | ||
00e2e675 | 3113 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3114 | nb_uri, uris); |
f73fabfd | 3115 | if (ret != LTTNG_OK) { |
b1d41407 | 3116 | free(uris); |
a4b92340 DG |
3117 | goto error; |
3118 | } | |
3119 | ||
3120 | /* | |
3121 | * XXX: 0 means that this URI should be applied on the session. Should | |
3122 | * be a DOMAIN enuam. | |
3123 | */ | |
3124 | if (cmd_ctx->lsm->domain.type == 0) { | |
3125 | /* Add the URI for the UST session if a consumer is present. */ | |
3126 | if (cmd_ctx->session->ust_session && | |
3127 | cmd_ctx->session->ust_session->consumer) { | |
3128 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3129 | nb_uri, uris); | |
3130 | } else if (cmd_ctx->session->kernel_session && | |
3131 | cmd_ctx->session->kernel_session->consumer) { | |
3132 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3133 | cmd_ctx->session, nb_uri, uris); | |
3134 | } | |
3135 | } | |
3136 | ||
b1d41407 DG |
3137 | free(uris); |
3138 | ||
00e2e675 DG |
3139 | break; |
3140 | } | |
f3ed775e | 3141 | case LTTNG_START_TRACE: |
8c0faa1d | 3142 | { |
54d01ffb | 3143 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3144 | break; |
3145 | } | |
f3ed775e | 3146 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3147 | { |
54d01ffb | 3148 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3149 | break; |
3150 | } | |
5e16da05 MD |
3151 | case LTTNG_CREATE_SESSION: |
3152 | { | |
a4b92340 DG |
3153 | size_t nb_uri, len; |
3154 | struct lttng_uri *uris = NULL; | |
3155 | ||
3156 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3157 | len = nb_uri * sizeof(struct lttng_uri); | |
3158 | ||
3159 | if (nb_uri > 0) { | |
3160 | uris = zmalloc(len); | |
3161 | if (uris == NULL) { | |
f73fabfd | 3162 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3163 | goto error; |
3164 | } | |
3165 | ||
3166 | /* Receive variable len data */ | |
77c7c900 | 3167 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3168 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3169 | if (ret <= 0) { | |
3170 | DBG("No URIs received from client... continuing"); | |
3171 | *sock_error = 1; | |
f73fabfd | 3172 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3173 | free(uris); |
a4b92340 DG |
3174 | goto error; |
3175 | } | |
3176 | ||
3177 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3178 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3179 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3180 | free(uris); |
a4b92340 DG |
3181 | goto error; |
3182 | } | |
3183 | } | |
3184 | ||
3185 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3186 | &cmd_ctx->creds, 0); |
a4b92340 | 3187 | |
b1d41407 DG |
3188 | free(uris); |
3189 | ||
00e2e675 DG |
3190 | break; |
3191 | } | |
5e16da05 MD |
3192 | case LTTNG_DESTROY_SESSION: |
3193 | { | |
2f77fc4b | 3194 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3195 | |
3196 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3197 | cmd_ctx->session = NULL; |
5461b305 | 3198 | break; |
5e16da05 | 3199 | } |
9f19cc17 | 3200 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3201 | { |
54d01ffb DG |
3202 | ssize_t nb_dom; |
3203 | struct lttng_domain *domains; | |
5461b305 | 3204 | |
54d01ffb DG |
3205 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3206 | if (nb_dom < 0) { | |
f73fabfd | 3207 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3208 | ret = -nb_dom; |
3209 | goto error; | |
ce3d728c | 3210 | } |
520ff687 | 3211 | |
54d01ffb | 3212 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3213 | if (ret < 0) { |
ae9c20bc | 3214 | free(domains); |
5461b305 | 3215 | goto setup_error; |
520ff687 | 3216 | } |
57167058 | 3217 | |
54d01ffb DG |
3218 | /* Copy event list into message payload */ |
3219 | memcpy(cmd_ctx->llm->payload, domains, | |
3220 | nb_dom * sizeof(struct lttng_domain)); | |
3221 | ||
3222 | free(domains); | |
5e16da05 | 3223 | |
f73fabfd | 3224 | ret = LTTNG_OK; |
5e16da05 MD |
3225 | break; |
3226 | } | |
9f19cc17 | 3227 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3228 | { |
6775595e | 3229 | int nb_chan; |
54d01ffb DG |
3230 | struct lttng_channel *channels; |
3231 | ||
b551a063 DG |
3232 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3233 | cmd_ctx->session, &channels); | |
54d01ffb | 3234 | if (nb_chan < 0) { |
f73fabfd | 3235 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3236 | ret = -nb_chan; |
3237 | goto error; | |
5461b305 | 3238 | } |
ca95a216 | 3239 | |
54d01ffb | 3240 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3241 | if (ret < 0) { |
ae9c20bc | 3242 | free(channels); |
5461b305 DG |
3243 | goto setup_error; |
3244 | } | |
9f19cc17 | 3245 | |
54d01ffb DG |
3246 | /* Copy event list into message payload */ |
3247 | memcpy(cmd_ctx->llm->payload, channels, | |
3248 | nb_chan * sizeof(struct lttng_channel)); | |
3249 | ||
3250 | free(channels); | |
9f19cc17 | 3251 | |
f73fabfd | 3252 | ret = LTTNG_OK; |
5461b305 | 3253 | break; |
5e16da05 | 3254 | } |
9f19cc17 | 3255 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3256 | { |
b551a063 | 3257 | ssize_t nb_event; |
684d34d2 | 3258 | struct lttng_event *events = NULL; |
9f19cc17 | 3259 | |
b551a063 | 3260 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3261 | cmd_ctx->lsm->u.list.channel_name, &events); |
3262 | if (nb_event < 0) { | |
f73fabfd | 3263 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3264 | ret = -nb_event; |
3265 | goto error; | |
5461b305 | 3266 | } |
ca95a216 | 3267 | |
54d01ffb | 3268 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3269 | if (ret < 0) { |
ae9c20bc | 3270 | free(events); |
5461b305 DG |
3271 | goto setup_error; |
3272 | } | |
9f19cc17 | 3273 | |
54d01ffb DG |
3274 | /* Copy event list into message payload */ |
3275 | memcpy(cmd_ctx->llm->payload, events, | |
3276 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3277 | |
54d01ffb | 3278 | free(events); |
9f19cc17 | 3279 | |
f73fabfd | 3280 | ret = LTTNG_OK; |
5461b305 | 3281 | break; |
5e16da05 MD |
3282 | } |
3283 | case LTTNG_LIST_SESSIONS: | |
3284 | { | |
8e0af1b4 | 3285 | unsigned int nr_sessions; |
5461b305 | 3286 | |
8e0af1b4 | 3287 | session_lock_list(); |
730389d9 DG |
3288 | nr_sessions = lttng_sessions_count( |
3289 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3290 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3291 | |
8e0af1b4 | 3292 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3293 | if (ret < 0) { |
54d01ffb | 3294 | session_unlock_list(); |
5461b305 | 3295 | goto setup_error; |
e065084a | 3296 | } |
5e16da05 | 3297 | |
6c9cc2ab | 3298 | /* Filled the session array */ |
2f77fc4b | 3299 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3300 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3301 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3302 | |
54d01ffb | 3303 | session_unlock_list(); |
5e16da05 | 3304 | |
f73fabfd | 3305 | ret = LTTNG_OK; |
5e16da05 MD |
3306 | break; |
3307 | } | |
d0254c7c MD |
3308 | case LTTNG_CALIBRATE: |
3309 | { | |
54d01ffb DG |
3310 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3311 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3312 | break; |
3313 | } | |
d9800920 DG |
3314 | case LTTNG_REGISTER_CONSUMER: |
3315 | { | |
2f77fc4b DG |
3316 | struct consumer_data *cdata; |
3317 | ||
3318 | switch (cmd_ctx->lsm->domain.type) { | |
3319 | case LTTNG_DOMAIN_KERNEL: | |
3320 | cdata = &kconsumer_data; | |
3321 | break; | |
3322 | default: | |
f73fabfd | 3323 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3324 | goto error; |
3325 | } | |
3326 | ||
54d01ffb | 3327 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3328 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3329 | break; |
3330 | } | |
6d805429 | 3331 | case LTTNG_DATA_PENDING: |
806e2684 | 3332 | { |
6d805429 | 3333 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3334 | break; |
3335 | } | |
da3c9ec1 DG |
3336 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3337 | { | |
6dc3064a DG |
3338 | struct lttcomm_lttng_output_id reply; |
3339 | ||
3340 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3341 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3342 | if (ret != LTTNG_OK) { | |
3343 | goto error; | |
3344 | } | |
3345 | ||
3346 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3347 | if (ret < 0) { | |
3348 | goto setup_error; | |
3349 | } | |
3350 | ||
3351 | /* Copy output list into message payload */ | |
3352 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3353 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3354 | break; |
3355 | } | |
3356 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3357 | { | |
6dc3064a DG |
3358 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3359 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3360 | break; |
3361 | } | |
3362 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3363 | { | |
6dc3064a DG |
3364 | ssize_t nb_output; |
3365 | struct lttng_snapshot_output *outputs = NULL; | |
3366 | ||
3367 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3368 | if (nb_output < 0) { | |
3369 | ret = -nb_output; | |
3370 | goto error; | |
3371 | } | |
3372 | ||
3373 | ret = setup_lttng_msg(cmd_ctx, | |
3374 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3375 | if (ret < 0) { | |
3376 | free(outputs); | |
3377 | goto setup_error; | |
3378 | } | |
3379 | ||
3380 | if (outputs) { | |
3381 | /* Copy output list into message payload */ | |
3382 | memcpy(cmd_ctx->llm->payload, outputs, | |
3383 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3384 | free(outputs); | |
3385 | } | |
3386 | ||
3387 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3388 | break; |
3389 | } | |
3390 | case LTTNG_SNAPSHOT_RECORD: | |
3391 | { | |
6dc3064a DG |
3392 | ret = cmd_snapshot_record(cmd_ctx->session, |
3393 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3394 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3395 | break; |
3396 | } | |
27babd3a DG |
3397 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3398 | { | |
3399 | size_t nb_uri, len; | |
3400 | struct lttng_uri *uris = NULL; | |
3401 | ||
3402 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3403 | len = nb_uri * sizeof(struct lttng_uri); | |
3404 | ||
3405 | if (nb_uri > 0) { | |
3406 | uris = zmalloc(len); | |
3407 | if (uris == NULL) { | |
3408 | ret = LTTNG_ERR_FATAL; | |
3409 | goto error; | |
3410 | } | |
3411 | ||
3412 | /* Receive variable len data */ | |
3413 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3414 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3415 | if (ret <= 0) { | |
3416 | DBG("No URIs received from client... continuing"); | |
3417 | *sock_error = 1; | |
3418 | ret = LTTNG_ERR_SESSION_FAIL; | |
3419 | free(uris); | |
3420 | goto error; | |
3421 | } | |
3422 | ||
3423 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3424 | DBG("Creating session with ONE network URI is a bad call"); | |
3425 | ret = LTTNG_ERR_SESSION_FAIL; | |
3426 | free(uris); | |
3427 | goto error; | |
3428 | } | |
3429 | } | |
3430 | ||
3431 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3432 | nb_uri, &cmd_ctx->creds); | |
3433 | free(uris); | |
3434 | break; | |
3435 | } | |
ecc48a90 JD |
3436 | case LTTNG_CREATE_SESSION_LIVE: |
3437 | { | |
3438 | size_t nb_uri, len; | |
3439 | struct lttng_uri *uris = NULL; | |
3440 | ||
3441 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3442 | len = nb_uri * sizeof(struct lttng_uri); | |
3443 | ||
3444 | if (nb_uri > 0) { | |
3445 | uris = zmalloc(len); | |
3446 | if (uris == NULL) { | |
3447 | ret = LTTNG_ERR_FATAL; | |
3448 | goto error; | |
3449 | } | |
3450 | ||
3451 | /* Receive variable len data */ | |
3452 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3453 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3454 | if (ret <= 0) { | |
3455 | DBG("No URIs received from client... continuing"); | |
3456 | *sock_error = 1; | |
3457 | ret = LTTNG_ERR_SESSION_FAIL; | |
3458 | free(uris); | |
3459 | goto error; | |
3460 | } | |
3461 | ||
3462 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3463 | DBG("Creating session with ONE network URI is a bad call"); | |
3464 | ret = LTTNG_ERR_SESSION_FAIL; | |
3465 | free(uris); | |
3466 | goto error; | |
3467 | } | |
3468 | } | |
3469 | ||
3470 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3471 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3472 | free(uris); | |
3473 | break; | |
3474 | } | |
5e16da05 | 3475 | default: |
f73fabfd | 3476 | ret = LTTNG_ERR_UND; |
5461b305 | 3477 | break; |
fac6795d DG |
3478 | } |
3479 | ||
5461b305 | 3480 | error: |
5461b305 DG |
3481 | if (cmd_ctx->llm == NULL) { |
3482 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3483 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3484 | goto setup_error; |
3485 | } | |
3486 | } | |
54d01ffb | 3487 | /* Set return code */ |
5461b305 | 3488 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3489 | setup_error: |
b5541356 | 3490 | if (cmd_ctx->session) { |
54d01ffb | 3491 | session_unlock(cmd_ctx->session); |
b5541356 | 3492 | } |
256a5576 MD |
3493 | if (need_tracing_session) { |
3494 | session_unlock_list(); | |
3495 | } | |
54d01ffb | 3496 | init_setup_error: |
8028d920 | 3497 | return ret; |
fac6795d DG |
3498 | } |
3499 | ||
44a5e5eb DG |
3500 | /* |
3501 | * Thread managing health check socket. | |
3502 | */ | |
3503 | static void *thread_manage_health(void *data) | |
3504 | { | |
eb4a2943 | 3505 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3506 | uint32_t revents, nb_fd; |
3507 | struct lttng_poll_event events; | |
0c89d795 MD |
3508 | struct health_comm_msg msg; |
3509 | struct health_comm_reply reply; | |
44a5e5eb DG |
3510 | |
3511 | DBG("[thread] Manage health check started"); | |
3512 | ||
3513 | rcu_register_thread(); | |
3514 | ||
6d737ce4 DG |
3515 | /* We might hit an error path before this is created. */ |
3516 | lttng_poll_init(&events); | |
3cc04881 | 3517 | |
44a5e5eb DG |
3518 | /* Create unix socket */ |
3519 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3520 | if (sock < 0) { | |
3521 | ERR("Unable to create health check Unix socket"); | |
3522 | ret = -1; | |
3523 | goto error; | |
3524 | } | |
3525 | ||
6c71277b MD |
3526 | if (is_root) { |
3527 | /* lttng health client socket path permissions */ | |
3528 | ret = chown(health_unix_sock_path, 0, | |
3529 | utils_get_group_id(tracing_group_name)); | |
3530 | if (ret < 0) { | |
3531 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3532 | PERROR("chown"); | |
3533 | ret = -1; | |
3534 | goto error; | |
3535 | } | |
3536 | ||
3537 | ret = chmod(health_unix_sock_path, | |
3538 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3539 | if (ret < 0) { | |
3540 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3541 | PERROR("chmod"); | |
3542 | ret = -1; | |
3543 | goto error; | |
3544 | } | |
3545 | } | |
3546 | ||
b662582b DG |
3547 | /* |
3548 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3549 | * show must go on. | |
3550 | */ | |
3551 | (void) utils_set_fd_cloexec(sock); | |
3552 | ||
44a5e5eb DG |
3553 | ret = lttcomm_listen_unix_sock(sock); |
3554 | if (ret < 0) { | |
3555 | goto error; | |
3556 | } | |
3557 | ||
3558 | /* | |
3559 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3560 | * more will be added to this poll set. | |
3561 | */ | |
d0b96690 | 3562 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3563 | if (ret < 0) { |
3564 | goto error; | |
3565 | } | |
3566 | ||
3567 | /* Add the application registration socket */ | |
3568 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3569 | if (ret < 0) { | |
3570 | goto error; | |
3571 | } | |
3572 | ||
3573 | while (1) { | |
3574 | DBG("Health check ready"); | |
3575 | ||
44a5e5eb DG |
3576 | /* Inifinite blocking call, waiting for transmission */ |
3577 | restart: | |
3578 | ret = lttng_poll_wait(&events, -1); | |
3579 | if (ret < 0) { | |
3580 | /* | |
3581 | * Restart interrupted system call. | |
3582 | */ | |
3583 | if (errno == EINTR) { | |
3584 | goto restart; | |
3585 | } | |
3586 | goto error; | |
3587 | } | |
3588 | ||
0d9c5d77 DG |
3589 | nb_fd = ret; |
3590 | ||
44a5e5eb DG |
3591 | for (i = 0; i < nb_fd; i++) { |
3592 | /* Fetch once the poll data */ | |
3593 | revents = LTTNG_POLL_GETEV(&events, i); | |
3594 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3595 | ||
3596 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3597 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3598 | if (ret) { |
139ac872 MD |
3599 | err = 0; |
3600 | goto exit; | |
44a5e5eb DG |
3601 | } |
3602 | ||
3603 | /* Event on the registration socket */ | |
3604 | if (pollfd == sock) { | |
3605 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3606 | ERR("Health socket poll error"); | |
3607 | goto error; | |
3608 | } | |
3609 | } | |
3610 | } | |
3611 | ||
3612 | new_sock = lttcomm_accept_unix_sock(sock); | |
3613 | if (new_sock < 0) { | |
3614 | goto error; | |
3615 | } | |
3616 | ||
b662582b DG |
3617 | /* |
3618 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3619 | * show must go on. | |
3620 | */ | |
3621 | (void) utils_set_fd_cloexec(new_sock); | |
3622 | ||
44a5e5eb DG |
3623 | DBG("Receiving data from client for health..."); |
3624 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3625 | if (ret <= 0) { | |
3626 | DBG("Nothing recv() from client... continuing"); | |
3627 | ret = close(new_sock); | |
3628 | if (ret) { | |
3629 | PERROR("close"); | |
3630 | } | |
3631 | new_sock = -1; | |
3632 | continue; | |
3633 | } | |
3634 | ||
3635 | rcu_thread_online(); | |
3636 | ||
6c71277b MD |
3637 | reply.ret_code = 0; |
3638 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { | |
3639 | /* | |
3640 | * health_check_state returns 0 if health is | |
3641 | * bad. | |
3642 | */ | |
3643 | if (!health_check_state(health_sessiond, i)) { | |
3644 | reply.ret_code |= 1ULL << i; | |
3645 | } | |
44a5e5eb DG |
3646 | } |
3647 | ||
6c71277b | 3648 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3649 | |
3650 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3651 | if (ret < 0) { | |
3652 | ERR("Failed to send health data back to client"); | |
3653 | } | |
3654 | ||
3655 | /* End of transmission */ | |
3656 | ret = close(new_sock); | |
3657 | if (ret) { | |
3658 | PERROR("close"); | |
3659 | } | |
3660 | new_sock = -1; | |
3661 | } | |
3662 | ||
139ac872 | 3663 | exit: |
44a5e5eb | 3664 | error: |
139ac872 MD |
3665 | if (err) { |
3666 | ERR("Health error occurred in %s", __func__); | |
3667 | } | |
44a5e5eb DG |
3668 | DBG("Health check thread dying"); |
3669 | unlink(health_unix_sock_path); | |
3670 | if (sock >= 0) { | |
3671 | ret = close(sock); | |
3672 | if (ret) { | |
3673 | PERROR("close"); | |
3674 | } | |
3675 | } | |
44a5e5eb DG |
3676 | |
3677 | lttng_poll_clean(&events); | |
3678 | ||
3679 | rcu_unregister_thread(); | |
3680 | return NULL; | |
3681 | } | |
3682 | ||
1d4b027a | 3683 | /* |
d063d709 DG |
3684 | * This thread manage all clients request using the unix client socket for |
3685 | * communication. | |
1d4b027a DG |
3686 | */ |
3687 | static void *thread_manage_clients(void *data) | |
3688 | { | |
139ac872 | 3689 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3690 | int sock_error; |
5eb91c98 | 3691 | uint32_t revents, nb_fd; |
273ea72c | 3692 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3693 | struct lttng_poll_event events; |
1d4b027a DG |
3694 | |
3695 | DBG("[thread] Manage client started"); | |
3696 | ||
f6a9efaa DG |
3697 | rcu_register_thread(); |
3698 | ||
6c71277b | 3699 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3700 | |
6993eeb3 CB |
3701 | if (testpoint(thread_manage_clients)) { |
3702 | goto error_testpoint; | |
3703 | } | |
3704 | ||
840cb59c | 3705 | health_code_update(); |
44a5e5eb | 3706 | |
1d4b027a DG |
3707 | ret = lttcomm_listen_unix_sock(client_sock); |
3708 | if (ret < 0) { | |
35df2755 | 3709 | goto error_listen; |
1d4b027a DG |
3710 | } |
3711 | ||
5eb91c98 DG |
3712 | /* |
3713 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3714 | * more will be added to this poll set. | |
3715 | */ | |
d0b96690 | 3716 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3717 | if (ret < 0) { |
35df2755 | 3718 | goto error_create_poll; |
5eb91c98 | 3719 | } |
273ea72c | 3720 | |
5eb91c98 DG |
3721 | /* Add the application registration socket */ |
3722 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3723 | if (ret < 0) { | |
3724 | goto error; | |
3725 | } | |
273ea72c | 3726 | |
bbd973c2 DG |
3727 | /* |
3728 | * Notify parent pid that we are ready to accept command for client side. | |
0bb7724a | 3729 | * This ppid is the one from the external process that spawned us. |
1d4b027a DG |
3730 | */ |
3731 | if (opt_sig_parent) { | |
8db8d1dc | 3732 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3733 | } |
3734 | ||
0bb7724a DG |
3735 | /* Notify the parent of the fork() process that we are ready. */ |
3736 | if (opt_daemon) { | |
3737 | kill(child_ppid, SIGUSR1); | |
3738 | } | |
3739 | ||
6993eeb3 CB |
3740 | if (testpoint(thread_manage_clients_before_loop)) { |
3741 | goto error; | |
3742 | } | |
8ac94142 | 3743 | |
840cb59c | 3744 | health_code_update(); |
44a5e5eb | 3745 | |
1d4b027a | 3746 | while (1) { |
1d4b027a | 3747 | DBG("Accepting client command ..."); |
273ea72c DG |
3748 | |
3749 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3750 | restart: |
a78af745 | 3751 | health_poll_entry(); |
5eb91c98 | 3752 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3753 | health_poll_exit(); |
273ea72c | 3754 | if (ret < 0) { |
88f2b785 MD |
3755 | /* |
3756 | * Restart interrupted system call. | |
3757 | */ | |
3758 | if (errno == EINTR) { | |
3759 | goto restart; | |
3760 | } | |
273ea72c DG |
3761 | goto error; |
3762 | } | |
3763 | ||
0d9c5d77 DG |
3764 | nb_fd = ret; |
3765 | ||
5eb91c98 DG |
3766 | for (i = 0; i < nb_fd; i++) { |
3767 | /* Fetch once the poll data */ | |
3768 | revents = LTTNG_POLL_GETEV(&events, i); | |
3769 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3770 | ||
840cb59c | 3771 | health_code_update(); |
44a5e5eb | 3772 | |
5eb91c98 | 3773 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3774 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3775 | if (ret) { |
139ac872 MD |
3776 | err = 0; |
3777 | goto exit; | |
5eb91c98 DG |
3778 | } |
3779 | ||
3780 | /* Event on the registration socket */ | |
3781 | if (pollfd == client_sock) { | |
3782 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3783 | ERR("Client socket poll error"); | |
3784 | goto error; | |
3785 | } | |
3786 | } | |
3787 | } | |
3788 | ||
3789 | DBG("Wait for client response"); | |
3790 | ||
840cb59c | 3791 | health_code_update(); |
44a5e5eb | 3792 | |
5eb91c98 DG |
3793 | sock = lttcomm_accept_unix_sock(client_sock); |
3794 | if (sock < 0) { | |
273ea72c | 3795 | goto error; |
273ea72c DG |
3796 | } |
3797 | ||
b662582b DG |
3798 | /* |
3799 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3800 | * show must go on. | |
3801 | */ | |
3802 | (void) utils_set_fd_cloexec(sock); | |
3803 | ||
be040666 DG |
3804 | /* Set socket option for credentials retrieval */ |
3805 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3806 | if (ret < 0) { | |
3807 | goto error; | |
3808 | } | |
3809 | ||
5eb91c98 | 3810 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3811 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3812 | if (cmd_ctx == NULL) { |
76d7553f | 3813 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3814 | goto error; |
5eb91c98 | 3815 | } |
1d4b027a | 3816 | |
5eb91c98 | 3817 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3818 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3819 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3820 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3821 | goto error; |
3822 | } | |
1d4b027a | 3823 | |
5eb91c98 DG |
3824 | cmd_ctx->llm = NULL; |
3825 | cmd_ctx->session = NULL; | |
1d4b027a | 3826 | |
840cb59c | 3827 | health_code_update(); |
44a5e5eb | 3828 | |
5eb91c98 DG |
3829 | /* |
3830 | * Data is received from the lttng client. The struct | |
3831 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3832 | * the client. | |
3833 | */ | |
3834 | DBG("Receiving data from client ..."); | |
be040666 DG |
3835 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3836 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3837 | if (ret <= 0) { |
3838 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3839 | ret = close(sock); |
3840 | if (ret) { | |
3841 | PERROR("close"); | |
3842 | } | |
3843 | sock = -1; | |
a2c0da86 | 3844 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3845 | continue; |
3846 | } | |
1d4b027a | 3847 | |
840cb59c | 3848 | health_code_update(); |
44a5e5eb | 3849 | |
5eb91c98 DG |
3850 | // TODO: Validate cmd_ctx including sanity check for |
3851 | // security purpose. | |
f7776ea7 | 3852 | |
f6a9efaa | 3853 | rcu_thread_online(); |
5eb91c98 DG |
3854 | /* |
3855 | * This function dispatch the work to the kernel or userspace tracer | |
3856 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3857 | * informations for the client. The command context struct contains | |
3858 | * everything this function may needs. | |
3859 | */ | |
53a80697 | 3860 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3861 | rcu_thread_offline(); |
5eb91c98 | 3862 | if (ret < 0) { |
36134aa1 DG |
3863 | ret = close(sock); |
3864 | if (ret) { | |
3865 | PERROR("close"); | |
53a80697 | 3866 | } |
36134aa1 | 3867 | sock = -1; |
bbd973c2 | 3868 | /* |
5eb91c98 | 3869 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3870 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3871 | * (ENOMEM). Error detected but still accept |
3872 | * command, unless a socket error has been | |
3873 | * detected. | |
bbd973c2 | 3874 | */ |
bbd973c2 | 3875 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3876 | continue; |
3877 | } | |
d6e4fca4 | 3878 | |
840cb59c | 3879 | health_code_update(); |
44a5e5eb | 3880 | |
54d01ffb DG |
3881 | DBG("Sending response (size: %d, retcode: %s)", |
3882 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3883 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3884 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3885 | if (ret < 0) { |
3886 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3887 | } |
1d4b027a | 3888 | |
5eb91c98 | 3889 | /* End of transmission */ |
76d7553f MD |
3890 | ret = close(sock); |
3891 | if (ret) { | |
3892 | PERROR("close"); | |
3893 | } | |
3894 | sock = -1; | |
be040666 DG |
3895 | |
3896 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3897 | |
840cb59c | 3898 | health_code_update(); |
273ea72c DG |
3899 | } |
3900 | ||
139ac872 | 3901 | exit: |
5eb91c98 | 3902 | error: |
35df2755 CB |
3903 | if (sock >= 0) { |
3904 | ret = close(sock); | |
3905 | if (ret) { | |
3906 | PERROR("close"); | |
3907 | } | |
139ac872 | 3908 | } |
44a5e5eb | 3909 | |
35df2755 CB |
3910 | lttng_poll_clean(&events); |
3911 | clean_command_ctx(&cmd_ctx); | |
3912 | ||
3913 | error_listen: | |
3914 | error_create_poll: | |
6993eeb3 | 3915 | error_testpoint: |
273ea72c | 3916 | unlink(client_unix_sock_path); |
76d7553f MD |
3917 | if (client_sock >= 0) { |
3918 | ret = close(client_sock); | |
3919 | if (ret) { | |
3920 | PERROR("close"); | |
3921 | } | |
a4b35e07 | 3922 | } |
35df2755 CB |
3923 | |
3924 | if (err) { | |
840cb59c | 3925 | health_error(); |
35df2755 | 3926 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3927 | } |
273ea72c | 3928 | |
8782cc74 | 3929 | health_unregister(health_sessiond); |
35df2755 CB |
3930 | |
3931 | DBG("Client thread dying"); | |
f6a9efaa DG |
3932 | |
3933 | rcu_unregister_thread(); | |
1d4b027a DG |
3934 | return NULL; |
3935 | } | |
3936 | ||
3937 | ||
fac6795d DG |
3938 | /* |
3939 | * usage function on stderr | |
3940 | */ | |
3941 | static void usage(void) | |
3942 | { | |
b716ce68 | 3943 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3944 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3945 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3946 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3947 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3948 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3949 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3950 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3951 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3952 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3953 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3954 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3955 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3956 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3957 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3958 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3959 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 3960 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
3961 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
3962 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 3963 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 3964 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3965 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 3966 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
fac6795d DG |
3967 | } |
3968 | ||
3969 | /* | |
3970 | * daemon argument parsing | |
3971 | */ | |
3972 | static int parse_args(int argc, char **argv) | |
3973 | { | |
3974 | int c; | |
3975 | ||
3976 | static struct option long_options[] = { | |
3977 | { "client-sock", 1, 0, 'c' }, | |
3978 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3979 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3980 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3981 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3982 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3983 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3984 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3985 | { "consumerd32-path", 1, 0, 'u' }, | |
3986 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3987 | { "consumerd64-path", 1, 0, 't' }, | |
3988 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3989 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3990 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3991 | { "help", 0, 0, 'h' }, |
3992 | { "group", 1, 0, 'g' }, | |
3993 | { "version", 0, 0, 'V' }, | |
75462a81 | 3994 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3995 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3996 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3997 | { "no-kernel", 0, 0, 'N' }, |
35f90c40 | 3998 | { "pidfile", 1, 0, 'p' }, |
4d076222 | 3999 | { "jul-tcp-port", 1, 0, 'J' }, |
fac6795d DG |
4000 | { NULL, 0, 0, 0 } |
4001 | }; | |
4002 | ||
4003 | while (1) { | |
4004 | int option_index = 0; | |
4d076222 | 4005 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t:p:J:", |
54d01ffb | 4006 | long_options, &option_index); |
fac6795d DG |
4007 | if (c == -1) { |
4008 | break; | |
4009 | } | |
4010 | ||
4011 | switch (c) { | |
4012 | case 0: | |
4013 | fprintf(stderr, "option %s", long_options[option_index].name); | |
4014 | if (optarg) { | |
4015 | fprintf(stderr, " with arg %s\n", optarg); | |
4016 | } | |
4017 | break; | |
b716ce68 | 4018 | case 'c': |
fac6795d DG |
4019 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
4020 | break; | |
4021 | case 'a': | |
4022 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
4023 | break; | |
4024 | case 'd': | |
4025 | opt_daemon = 1; | |
4026 | break; | |
4027 | case 'g': | |
6c71277b | 4028 | tracing_group_name = optarg; |
fac6795d DG |
4029 | break; |
4030 | case 'h': | |
4031 | usage(); | |
4032 | exit(EXIT_FAILURE); | |
4033 | case 'V': | |
4034 | fprintf(stdout, "%s\n", VERSION); | |
4035 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
4036 | case 'S': |
4037 | opt_sig_parent = 1; | |
4038 | break; | |
d6f42150 | 4039 | case 'E': |
3bd1e081 | 4040 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
4041 | break; |
4042 | case 'C': | |
3bd1e081 MD |
4043 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
4044 | break; | |
4045 | case 'F': | |
7753dea8 | 4046 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
4047 | break; |
4048 | case 'D': | |
7753dea8 MD |
4049 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
4050 | break; | |
4051 | case 'H': | |
4052 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
4053 | break; | |
4054 | case 'G': | |
4055 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 4056 | break; |
4fba7219 DG |
4057 | case 'N': |
4058 | opt_no_kernel = 1; | |
4059 | break; | |
75462a81 | 4060 | case 'q': |
97e19046 | 4061 | lttng_opt_quiet = 1; |
75462a81 | 4062 | break; |
3f9947db | 4063 | case 'v': |
53086306 | 4064 | /* Verbose level can increase using multiple -v */ |
97e19046 | 4065 | lttng_opt_verbose += 1; |
3f9947db | 4066 | break; |
31f73cc9 | 4067 | case 'Z': |
3bd1e081 | 4068 | opt_verbose_consumer += 1; |
31f73cc9 | 4069 | break; |
fb09408a | 4070 | case 'u': |
fc7a59ce | 4071 | consumerd32_bin= optarg; |
ebaeda94 MD |
4072 | break; |
4073 | case 'U': | |
4074 | consumerd32_libdir = optarg; | |
7753dea8 MD |
4075 | break; |
4076 | case 't': | |
fc7a59ce | 4077 | consumerd64_bin = optarg; |
ebaeda94 MD |
4078 | break; |
4079 | case 'T': | |
4080 | consumerd64_libdir = optarg; | |
fb09408a | 4081 | break; |
35f90c40 DG |
4082 | case 'p': |
4083 | opt_pidfile = optarg; | |
4084 | break; | |
4d076222 DG |
4085 | case 'J': /* JUL TCP port. */ |
4086 | { | |
4087 | unsigned long v; | |
4088 | ||
4089 | errno = 0; | |
4090 | v = strtoul(optarg, NULL, 0); | |
4091 | if (errno != 0 || !isdigit(optarg[0])) { | |
4092 | ERR("Wrong value in --jul-tcp-port parameter: %s", optarg); | |
4093 | return -1; | |
4094 | } | |
4095 | if (v == 0 || v >= 65535) { | |
4096 | ERR("Port overflow in --jul-tcp-port parameter: %s", optarg); | |
4097 | return -1; | |
4098 | } | |
4099 | jul_tcp_port = (uint32_t) v; | |
4100 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4101 | break; | |
4102 | } | |
fac6795d DG |
4103 | default: |
4104 | /* Unknown option or other error. | |
4105 | * Error is printed by getopt, just return */ | |
4106 | return -1; | |
4107 | } | |
4108 | } | |
4109 | ||
4110 | return 0; | |
4111 | } | |
4112 | ||
4113 | /* | |
d063d709 | 4114 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4115 | * apps_sock - The communication socket for all UST apps. |
4116 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4117 | */ |
cf3af59e | 4118 | static int init_daemon_socket(void) |
fac6795d DG |
4119 | { |
4120 | int ret = 0; | |
4121 | mode_t old_umask; | |
4122 | ||
4123 | old_umask = umask(0); | |
4124 | ||
4125 | /* Create client tool unix socket */ | |
d6f42150 DG |
4126 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4127 | if (client_sock < 0) { | |
4128 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4129 | ret = -1; |
4130 | goto end; | |
4131 | } | |
4132 | ||
b662582b DG |
4133 | /* Set the cloexec flag */ |
4134 | ret = utils_set_fd_cloexec(client_sock); | |
4135 | if (ret < 0) { | |
4136 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4137 | "Continuing but note that the consumer daemon will have a " | |
4138 | "reference to this socket on exec()", client_sock); | |
4139 | } | |
4140 | ||
fac6795d DG |
4141 | /* File permission MUST be 660 */ |
4142 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4143 | if (ret < 0) { | |
d6f42150 | 4144 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4145 | PERROR("chmod"); |
fac6795d DG |
4146 | goto end; |
4147 | } | |
4148 | ||
4149 | /* Create the application unix socket */ | |
d6f42150 DG |
4150 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4151 | if (apps_sock < 0) { | |
4152 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4153 | ret = -1; |
4154 | goto end; | |
4155 | } | |
4156 | ||
b662582b DG |
4157 | /* Set the cloexec flag */ |
4158 | ret = utils_set_fd_cloexec(apps_sock); | |
4159 | if (ret < 0) { | |
4160 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4161 | "Continuing but note that the consumer daemon will have a " | |
4162 | "reference to this socket on exec()", apps_sock); | |
4163 | } | |
4164 | ||
d6f42150 | 4165 | /* File permission MUST be 666 */ |
54d01ffb DG |
4166 | ret = chmod(apps_unix_sock_path, |
4167 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4168 | if (ret < 0) { |
d6f42150 | 4169 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4170 | PERROR("chmod"); |
fac6795d DG |
4171 | goto end; |
4172 | } | |
4173 | ||
b662582b DG |
4174 | DBG3("Session daemon client socket %d and application socket %d created", |
4175 | client_sock, apps_sock); | |
4176 | ||
fac6795d DG |
4177 | end: |
4178 | umask(old_umask); | |
4179 | return ret; | |
4180 | } | |
4181 | ||
4182 | /* | |
54d01ffb DG |
4183 | * Check if the global socket is available, and if a daemon is answering at the |
4184 | * other side. If yes, error is returned. | |
fac6795d | 4185 | */ |
cf3af59e | 4186 | static int check_existing_daemon(void) |
fac6795d | 4187 | { |
7d8234d9 | 4188 | /* Is there anybody out there ? */ |
099e26bd | 4189 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4190 | return -EEXIST; |
099e26bd | 4191 | } |
b09c7c76 DG |
4192 | |
4193 | return 0; | |
fac6795d DG |
4194 | } |
4195 | ||
fac6795d | 4196 | /* |
d063d709 | 4197 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4198 | * |
d063d709 | 4199 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4200 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4201 | */ |
be040666 | 4202 | static int set_permissions(char *rundir) |
fac6795d DG |
4203 | { |
4204 | int ret; | |
996b65c8 | 4205 | gid_t gid; |
fac6795d | 4206 | |
6c71277b | 4207 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4208 | |
d6f42150 | 4209 | /* Set lttng run dir */ |
be040666 | 4210 | ret = chown(rundir, 0, gid); |
d6f42150 | 4211 | if (ret < 0) { |
be040666 | 4212 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4213 | PERROR("chown"); |
d6f42150 DG |
4214 | } |
4215 | ||
6c71277b MD |
4216 | /* |
4217 | * Ensure all applications and tracing group can search the run | |
4218 | * dir. Allow everyone to read the directory, since it does not | |
4219 | * buy us anything to hide its content. | |
4220 | */ | |
4221 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4222 | if (ret < 0) { |
4223 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4224 | PERROR("chmod"); |
d1613cf5 JN |
4225 | } |
4226 | ||
d6f42150 | 4227 | /* lttng client socket path */ |
996b65c8 | 4228 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4229 | if (ret < 0) { |
d6f42150 | 4230 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4231 | PERROR("chown"); |
d6f42150 DG |
4232 | } |
4233 | ||
3bd1e081 | 4234 | /* kconsumer error socket path */ |
6c71277b | 4235 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4236 | if (ret < 0) { |
3bd1e081 | 4237 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4238 | PERROR("chown"); |
3bd1e081 MD |
4239 | } |
4240 | ||
7753dea8 | 4241 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4242 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4243 | if (ret < 0) { |
4244 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4245 | PERROR("chown"); |
7753dea8 MD |
4246 | } |
4247 | ||
4248 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4249 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4250 | if (ret < 0) { |
7753dea8 | 4251 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4252 | PERROR("chown"); |
fac6795d DG |
4253 | } |
4254 | ||
d6f42150 | 4255 | DBG("All permissions are set"); |
e07ae692 | 4256 | |
fac6795d DG |
4257 | return ret; |
4258 | } | |
4259 | ||
d6f42150 | 4260 | /* |
d063d709 | 4261 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4262 | */ |
67e40797 | 4263 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4264 | { |
4265 | int ret; | |
4266 | ||
67e40797 DG |
4267 | DBG3("Creating LTTng run directory: %s", rundir); |
4268 | ||
d1613cf5 | 4269 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4270 | if (ret < 0) { |
b1f11e69 | 4271 | if (errno != EEXIST) { |
67e40797 | 4272 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4273 | goto error; |
4274 | } else { | |
4275 | ret = 0; | |
4276 | } | |
d6f42150 DG |
4277 | } |
4278 | ||
4279 | error: | |
4280 | return ret; | |
4281 | } | |
4282 | ||
4283 | /* | |
d063d709 DG |
4284 | * Setup sockets and directory needed by the kconsumerd communication with the |
4285 | * session daemon. | |
d6f42150 | 4286 | */ |
67e40797 DG |
4287 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4288 | const char *rundir) | |
d6f42150 DG |
4289 | { |
4290 | int ret; | |
67e40797 | 4291 | char path[PATH_MAX]; |
d6f42150 | 4292 | |
6c71277b | 4293 | switch (consumer_data->type) { |
7753dea8 | 4294 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4295 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4296 | break; |
4297 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4298 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4299 | break; |
4300 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4301 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4302 | break; |
4303 | default: | |
4304 | ERR("Consumer type unknown"); | |
4305 | ret = -EINVAL; | |
4306 | goto error; | |
d6f42150 DG |
4307 | } |
4308 | ||
67e40797 DG |
4309 | DBG2("Creating consumer directory: %s", path); |
4310 | ||
6c71277b | 4311 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4312 | if (ret < 0) { |
6beb2242 | 4313 | if (errno != EEXIST) { |
f11e84c2 | 4314 | PERROR("mkdir"); |
3bd1e081 | 4315 | ERR("Failed to create %s", path); |
6beb2242 DG |
4316 | goto error; |
4317 | } | |
f11e84c2 | 4318 | ret = -1; |
d6f42150 | 4319 | } |
6c71277b MD |
4320 | if (is_root) { |
4321 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4322 | if (ret < 0) { | |
4323 | ERR("Unable to set group on %s", path); | |
4324 | PERROR("chown"); | |
4325 | goto error; | |
4326 | } | |
4327 | } | |
d6f42150 DG |
4328 | |
4329 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4330 | consumer_data->err_sock = |
4331 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4332 | if (consumer_data->err_sock < 0) { | |
4333 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4334 | ret = -1; |
4335 | goto error; | |
4336 | } | |
4337 | ||
a24f05ab MD |
4338 | /* |
4339 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4340 | * show must go on. | |
4341 | */ | |
4342 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4343 | if (ret < 0) { | |
4344 | PERROR("utils_set_fd_cloexec"); | |
4345 | /* continue anyway */ | |
4346 | } | |
4347 | ||
d6f42150 | 4348 | /* File permission MUST be 660 */ |
3bd1e081 | 4349 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4350 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4351 | if (ret < 0) { |
3bd1e081 | 4352 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4353 | PERROR("chmod"); |
d6f42150 DG |
4354 | goto error; |
4355 | } | |
4356 | ||
4357 | error: | |
4358 | return ret; | |
4359 | } | |
4360 | ||
fac6795d | 4361 | /* |
d063d709 | 4362 | * Signal handler for the daemon |
cf3af59e | 4363 | * |
54d01ffb DG |
4364 | * Simply stop all worker threads, leaving main() return gracefully after |
4365 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4366 | */ |
4367 | static void sighandler(int sig) | |
4368 | { | |
4369 | switch (sig) { | |
cf3af59e | 4370 | case SIGPIPE: |
af87c45a | 4371 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4372 | return; |
4373 | case SIGINT: | |
af87c45a | 4374 | DBG("SIGINT caught"); |
cf3af59e MD |
4375 | stop_threads(); |
4376 | break; | |
4377 | case SIGTERM: | |
af87c45a | 4378 | DBG("SIGTERM caught"); |
cf3af59e MD |
4379 | stop_threads(); |
4380 | break; | |
0bb7724a DG |
4381 | case SIGUSR1: |
4382 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4383 | break; | |
cf3af59e MD |
4384 | default: |
4385 | break; | |
fac6795d | 4386 | } |
fac6795d DG |
4387 | } |
4388 | ||
4389 | /* | |
d063d709 | 4390 | * Setup signal handler for : |
1d4b027a | 4391 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4392 | */ |
1d4b027a | 4393 | static int set_signal_handler(void) |
fac6795d | 4394 | { |
1d4b027a DG |
4395 | int ret = 0; |
4396 | struct sigaction sa; | |
4397 | sigset_t sigset; | |
fac6795d | 4398 | |
1d4b027a | 4399 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4400 | PERROR("sigemptyset"); |
1d4b027a DG |
4401 | return ret; |
4402 | } | |
d6f42150 | 4403 | |
1d4b027a DG |
4404 | sa.sa_handler = sighandler; |
4405 | sa.sa_mask = sigset; | |
4406 | sa.sa_flags = 0; | |
4407 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4408 | PERROR("sigaction"); |
1d4b027a | 4409 | return ret; |
d6f42150 DG |
4410 | } |
4411 | ||
1d4b027a | 4412 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4413 | PERROR("sigaction"); |
1d4b027a | 4414 | return ret; |
d6f42150 | 4415 | } |
aaf26714 | 4416 | |
1d4b027a | 4417 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4418 | PERROR("sigaction"); |
1d4b027a | 4419 | return ret; |
8c0faa1d DG |
4420 | } |
4421 | ||
0bb7724a DG |
4422 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4423 | PERROR("sigaction"); | |
4424 | return ret; | |
4425 | } | |
4426 | ||
4427 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4428 | |
4429 | return ret; | |
fac6795d DG |
4430 | } |
4431 | ||
f3ed775e | 4432 | /* |
d063d709 DG |
4433 | * Set open files limit to unlimited. This daemon can open a large number of |
4434 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4435 | */ |
4436 | static void set_ulimit(void) | |
4437 | { | |
4438 | int ret; | |
4439 | struct rlimit lim; | |
4440 | ||
a88df331 | 4441 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4442 | lim.rlim_cur = 65535; |
4443 | lim.rlim_max = 65535; | |
4444 | ||
4445 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4446 | if (ret < 0) { | |
76d7553f | 4447 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4448 | } |
4449 | } | |
4450 | ||
35f90c40 DG |
4451 | /* |
4452 | * Write pidfile using the rundir and opt_pidfile. | |
4453 | */ | |
4454 | static void write_pidfile(void) | |
4455 | { | |
4456 | int ret; | |
4457 | char pidfile_path[PATH_MAX]; | |
4458 | ||
4459 | assert(rundir); | |
4460 | ||
4461 | if (opt_pidfile) { | |
4462 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4463 | } else { | |
4464 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4465 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4466 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4467 | if (ret < 0) { | |
4468 | PERROR("snprintf pidfile path"); | |
4469 | goto error; | |
4470 | } | |
4471 | } | |
4472 | ||
4473 | /* | |
4474 | * Create pid file in rundir. Return value is of no importance. The | |
4475 | * execution will continue even though we are not able to write the file. | |
4476 | */ | |
4477 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4478 | ||
4479 | error: | |
4480 | return; | |
4481 | } | |
4482 | ||
cd9290dd DG |
4483 | /* |
4484 | * Write JUL TCP port using the rundir. | |
4485 | */ | |
4486 | static void write_julport(void) | |
4487 | { | |
4488 | int ret; | |
4489 | char path[PATH_MAX]; | |
4490 | ||
4491 | assert(rundir); | |
4492 | ||
4493 | ret = snprintf(path, sizeof(path), "%s/" | |
4494 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4495 | if (ret < 0) { | |
4496 | PERROR("snprintf julport path"); | |
4497 | goto error; | |
4498 | } | |
4499 | ||
4500 | /* | |
4501 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4502 | * The execution will continue even though we are not able to write the | |
4503 | * file. | |
4504 | */ | |
4505 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4506 | ||
4507 | error: | |
4508 | return; | |
4509 | } | |
4510 | ||
0bb7724a DG |
4511 | /* |
4512 | * Daemonize this process by forking and making the parent wait for the child | |
4513 | * to signal it indicating readiness. Once received, the parent successfully | |
4514 | * quits. | |
4515 | * | |
4516 | * The child process undergoes the same action that daemon(3) does meaning | |
4517 | * setsid, chdir, and dup /dev/null into 0, 1 and 2. | |
4518 | * | |
4519 | * Return 0 on success else -1 on error. | |
4520 | */ | |
4521 | static int daemonize(void) | |
4522 | { | |
4523 | int ret; | |
4524 | pid_t pid; | |
4525 | ||
4526 | /* Get parent pid of this process. */ | |
4527 | child_ppid = getppid(); | |
4528 | ||
4529 | pid = fork(); | |
4530 | if (pid < 0) { | |
4531 | PERROR("fork"); | |
4532 | goto error; | |
4533 | } else if (pid == 0) { | |
4534 | int fd; | |
4535 | pid_t sid; | |
4536 | ||
4537 | /* Child */ | |
4538 | ||
4539 | /* | |
4540 | * Get the newly created parent pid so we can signal that process when | |
4541 | * we are ready to operate. | |
4542 | */ | |
4543 | child_ppid = getppid(); | |
4544 | ||
4545 | sid = setsid(); | |
4546 | if (sid < 0) { | |
4547 | PERROR("setsid"); | |
4548 | goto error; | |
4549 | } | |
4550 | ||
4551 | /* Try to change directory to /. If we can't well at least notify. */ | |
4552 | ret = chdir("/"); | |
4553 | if (ret < 0) { | |
4554 | PERROR("chdir"); | |
4555 | } | |
4556 | ||
4557 | fd = open(_PATH_DEVNULL, O_RDWR, 0); | |
4558 | if (fd < 0) { | |
4559 | PERROR("open %s", _PATH_DEVNULL); | |
4560 | /* Let 0, 1 and 2 open since we can't bind them to /dev/null. */ | |
4561 | } else { | |
4562 | (void) dup2(fd, STDIN_FILENO); | |
4563 | (void) dup2(fd, STDOUT_FILENO); | |
4564 | (void) dup2(fd, STDERR_FILENO); | |
4565 | if (fd > 2) { | |
4566 | ret = close(fd); | |
4567 | if (ret < 0) { | |
4568 | PERROR("close"); | |
4569 | } | |
4570 | } | |
4571 | } | |
4572 | goto end; | |
4573 | } else { | |
4574 | /* Parent */ | |
4575 | ||
4576 | /* | |
4577 | * Waiting for child to notify this parent that it can exit. Note that | |
4578 | * sleep() is interrupted before the 1 second delay as soon as the | |
4579 | * signal is received, so it will not cause visible delay for the | |
4580 | * user. | |
4581 | */ | |
4582 | while (!CMM_LOAD_SHARED(recv_child_signal)) { | |
077df0b3 DG |
4583 | int status; |
4584 | pid_t ret; | |
4585 | ||
4586 | /* | |
4587 | * Check if child exists without blocking. If so, we have to stop | |
4588 | * this parent process and return an error. | |
4589 | */ | |
4590 | ret = waitpid(pid, &status, WNOHANG); | |
4591 | if (ret < 0 || (ret != 0 && WIFEXITED(status))) { | |
4592 | /* The child exited somehow or was not valid. */ | |
4593 | goto error; | |
4594 | } | |
0bb7724a DG |
4595 | sleep(1); |
4596 | } | |
4597 | ||
4598 | /* | |
4599 | * From this point on, the parent can exit and the child is now an | |
4600 | * operationnal session daemon ready to serve clients and applications. | |
4601 | */ | |
4602 | exit(EXIT_SUCCESS); | |
4603 | } | |
4604 | ||
4605 | end: | |
4606 | return 0; | |
4607 | ||
4608 | error: | |
4609 | return -1; | |
4610 | } | |
4611 | ||
fac6795d DG |
4612 | /* |
4613 | * main | |
4614 | */ | |
4615 | int main(int argc, char **argv) | |
4616 | { | |
fac6795d DG |
4617 | int ret = 0; |
4618 | void *status; | |
ae9e45b3 | 4619 | const char *home_path, *env_app_timeout; |
fac6795d | 4620 | |
335a95b7 MD |
4621 | init_kernel_workarounds(); |
4622 | ||
f6a9efaa DG |
4623 | rcu_register_thread(); |
4624 | ||
0bb7724a DG |
4625 | if ((ret = set_signal_handler()) < 0) { |
4626 | goto error; | |
4627 | } | |
4628 | ||
7753dea8 | 4629 | setup_consumerd_path(); |
fb09408a | 4630 | |
12744796 DG |
4631 | page_size = sysconf(_SC_PAGESIZE); |
4632 | if (page_size < 0) { | |
4633 | PERROR("sysconf _SC_PAGESIZE"); | |
4634 | page_size = LONG_MAX; | |
4635 | WARN("Fallback page size to %ld", page_size); | |
4636 | } | |
4637 | ||
fac6795d DG |
4638 | /* Parse arguments */ |
4639 | progname = argv[0]; | |
c617c0c6 | 4640 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 4641 | goto error; |
fac6795d DG |
4642 | } |
4643 | ||
4644 | /* Daemonize */ | |
4645 | if (opt_daemon) { | |
ceed52b5 MD |
4646 | int i; |
4647 | ||
0bb7724a | 4648 | ret = daemonize(); |
53094c05 | 4649 | if (ret < 0) { |
cf3af59e | 4650 | goto error; |
53094c05 | 4651 | } |
0bb7724a | 4652 | |
ceed52b5 | 4653 | /* |
0bb7724a DG |
4654 | * We are in the child. Make sure all other file descriptors are |
4655 | * closed, in case we are called with more opened file descriptors than | |
4656 | * the standard ones. | |
ceed52b5 MD |
4657 | */ |
4658 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4659 | (void) close(i); | |
4660 | } | |
4661 | } | |
4662 | ||
4663 | /* Create thread quit pipe */ | |
4664 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4665 | goto error; | |
fac6795d DG |
4666 | } |
4667 | ||
4668 | /* Check if daemon is UID = 0 */ | |
4669 | is_root = !getuid(); | |
4670 | ||
fac6795d | 4671 | if (is_root) { |
990570ed | 4672 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4673 | |
4674 | /* Create global run dir with root access */ | |
4675 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4676 | if (ret < 0) { |
cf3af59e | 4677 | goto error; |
d6f42150 DG |
4678 | } |
4679 | ||
fac6795d | 4680 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4681 | snprintf(apps_unix_sock_path, PATH_MAX, |
4682 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4683 | } |
4684 | ||
4685 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4686 | snprintf(client_unix_sock_path, PATH_MAX, |
4687 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4688 | } | |
0fdd1e2c DG |
4689 | |
4690 | /* Set global SHM for ust */ | |
4691 | if (strlen(wait_shm_path) == 0) { | |
4692 | snprintf(wait_shm_path, PATH_MAX, | |
4693 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4694 | } | |
67e40797 | 4695 | |
44a5e5eb DG |
4696 | if (strlen(health_unix_sock_path) == 0) { |
4697 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4698 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4699 | } | |
4700 | ||
67e40797 DG |
4701 | /* Setup kernel consumerd path */ |
4702 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4703 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4704 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4705 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4706 | |
4707 | DBG2("Kernel consumer err path: %s", | |
4708 | kconsumer_data.err_unix_sock_path); | |
4709 | DBG2("Kernel consumer cmd path: %s", | |
4710 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4711 | } else { |
feb0f3e5 | 4712 | home_path = utils_get_home_dir(); |
b082db07 | 4713 | if (home_path == NULL) { |
273ea72c DG |
4714 | /* TODO: Add --socket PATH option */ |
4715 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4716 | ret = -EPERM; |
4717 | goto error; | |
b082db07 DG |
4718 | } |
4719 | ||
67e40797 DG |
4720 | /* |
4721 | * Create rundir from home path. This will create something like | |
4722 | * $HOME/.lttng | |
4723 | */ | |
990570ed | 4724 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4725 | if (ret < 0) { |
4726 | ret = -ENOMEM; | |
4727 | goto error; | |
4728 | } | |
4729 | ||
4730 | ret = create_lttng_rundir(rundir); | |
4731 | if (ret < 0) { | |
4732 | goto error; | |
4733 | } | |
4734 | ||
fac6795d | 4735 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4736 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4737 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4738 | } |
4739 | ||
4740 | /* Set the cli tool unix socket path */ | |
4741 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4742 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4743 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4744 | } |
0fdd1e2c DG |
4745 | |
4746 | /* Set global SHM for ust */ | |
4747 | if (strlen(wait_shm_path) == 0) { | |
4748 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4749 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4750 | } |
44a5e5eb DG |
4751 | |
4752 | /* Set health check Unix path */ | |
4753 | if (strlen(health_unix_sock_path) == 0) { | |
4754 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4755 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4756 | } | |
fac6795d DG |
4757 | } |
4758 | ||
5c827ce0 DG |
4759 | /* Set consumer initial state */ |
4760 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4761 | ust_consumerd_state = CONSUMER_STOPPED; | |
4762 | ||
847177cd DG |
4763 | DBG("Client socket path %s", client_unix_sock_path); |
4764 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4765 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4766 | DBG("LTTng run directory path: %s", rundir); |
4767 | ||
4768 | /* 32 bits consumerd path setup */ | |
4769 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4770 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4771 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4772 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4773 | |
4774 | DBG2("UST consumer 32 bits err path: %s", | |
4775 | ustconsumer32_data.err_unix_sock_path); | |
4776 | DBG2("UST consumer 32 bits cmd path: %s", | |
4777 | ustconsumer32_data.cmd_unix_sock_path); | |
4778 | ||
4779 | /* 64 bits consumerd path setup */ | |
4780 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4781 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4782 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4783 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4784 | |
4785 | DBG2("UST consumer 64 bits err path: %s", | |
4786 | ustconsumer64_data.err_unix_sock_path); | |
4787 | DBG2("UST consumer 64 bits cmd path: %s", | |
4788 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4789 | |
273ea72c | 4790 | /* |
7d8234d9 | 4791 | * See if daemon already exist. |
fac6795d | 4792 | */ |
7d8234d9 | 4793 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4794 | ERR("Already running daemon.\n"); |
273ea72c | 4795 | /* |
cf3af59e MD |
4796 | * We do not goto exit because we must not cleanup() |
4797 | * because a daemon is already running. | |
ab118b20 | 4798 | */ |
cf3af59e | 4799 | goto error; |
a88df331 DG |
4800 | } |
4801 | ||
1427f9b2 DG |
4802 | /* |
4803 | * Init UST app hash table. Alloc hash table before this point since | |
4804 | * cleanup() can get called after that point. | |
4805 | */ | |
4806 | ust_app_ht_alloc(); | |
4807 | ||
f20baf8e DG |
4808 | /* Initialize JUL domain subsystem. */ |
4809 | if ((ret = jul_init()) < 0) { | |
4810 | /* ENOMEM at this point. */ | |
4811 | goto error; | |
4812 | } | |
4813 | ||
54d01ffb | 4814 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4815 | |
4816 | /* | |
4817 | * These actions must be executed as root. We do that *after* setting up | |
4818 | * the sockets path because we MUST make the check for another daemon using | |
4819 | * those paths *before* trying to set the kernel consumer sockets and init | |
4820 | * kernel tracer. | |
4821 | */ | |
4822 | if (is_root) { | |
67e40797 | 4823 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4824 | if (ret < 0) { |
4825 | goto exit; | |
4826 | } | |
4827 | ||
a88df331 | 4828 | /* Setup kernel tracer */ |
4fba7219 DG |
4829 | if (!opt_no_kernel) { |
4830 | init_kernel_tracer(); | |
4831 | } | |
a88df331 DG |
4832 | |
4833 | /* Set ulimit for open files */ | |
4834 | set_ulimit(); | |
fac6795d | 4835 | } |
4063050c MD |
4836 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4837 | lttng_fd_init(); | |
fac6795d | 4838 | |
67e40797 DG |
4839 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4840 | if (ret < 0) { | |
4841 | goto exit; | |
4842 | } | |
4843 | ||
4844 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4845 | if (ret < 0) { | |
4846 | goto exit; | |
4847 | } | |
4848 | ||
d6f42150 | 4849 | /* Setup the needed unix socket */ |
cf3af59e MD |
4850 | if ((ret = init_daemon_socket()) < 0) { |
4851 | goto exit; | |
fac6795d DG |
4852 | } |
4853 | ||
4854 | /* Set credentials to socket */ | |
be040666 | 4855 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4856 | goto exit; |
fac6795d DG |
4857 | } |
4858 | ||
5b8719f5 DG |
4859 | /* Get parent pid if -S, --sig-parent is specified. */ |
4860 | if (opt_sig_parent) { | |
4861 | ppid = getppid(); | |
4862 | } | |
4863 | ||
7a485870 | 4864 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4865 | if (is_root && !opt_no_kernel) { |
4866 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4867 | goto exit; | |
4868 | } | |
7a485870 DG |
4869 | } |
4870 | ||
0b2dc8df MD |
4871 | /* Setup the thread ht_cleanup communication pipe. */ |
4872 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
4873 | goto exit; | |
4874 | } | |
4875 | ||
099e26bd | 4876 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4877 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4878 | goto exit; |
4879 | } | |
4880 | ||
d0b96690 DG |
4881 | /* Setup the thread apps notify communication pipe. */ |
4882 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4883 | goto exit; | |
4884 | } | |
4885 | ||
7972aab2 DG |
4886 | /* Initialize global buffer per UID and PID registry. */ |
4887 | buffer_reg_init_uid_registry(); | |
4888 | buffer_reg_init_pid_registry(); | |
4889 | ||
099e26bd DG |
4890 | /* Init UST command queue. */ |
4891 | cds_wfq_init(&ust_cmd_queue.queue); | |
4892 | ||
273ea72c | 4893 | /* |
54d01ffb DG |
4894 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4895 | * statically declared in session.c | |
273ea72c | 4896 | */ |
54d01ffb | 4897 | session_list_ptr = session_get_list(); |
b5541356 | 4898 | |
5eb91c98 DG |
4899 | /* Set up max poll set size */ |
4900 | lttng_poll_set_max_size(); | |
4901 | ||
2f77fc4b | 4902 | cmd_init(); |
00e2e675 | 4903 | |
ae9e45b3 DG |
4904 | /* Check for the application socket timeout env variable. */ |
4905 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4906 | if (env_app_timeout) { | |
4907 | app_socket_timeout = atoi(env_app_timeout); | |
4908 | } else { | |
4909 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4910 | } | |
4911 | ||
35f90c40 | 4912 | write_pidfile(); |
cd9290dd | 4913 | write_julport(); |
35f90c40 | 4914 | |
554831e7 MD |
4915 | /* Initialize communication library */ |
4916 | lttcomm_init(); | |
d831c249 DG |
4917 | /* This is to get the TCP timeout value. */ |
4918 | lttcomm_inet_init(); | |
554831e7 | 4919 | |
67e05644 DG |
4920 | /* |
4921 | * Initialize the health check subsystem. This call should set the | |
4922 | * appropriate time values. | |
4923 | */ | |
6c71277b | 4924 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
4925 | if (!health_sessiond) { |
4926 | PERROR("health_app_create error"); | |
4927 | goto exit_health_sessiond_cleanup; | |
4928 | } | |
67e05644 | 4929 | |
d5b9fd2f | 4930 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
4931 | ret = pthread_create(&ht_cleanup_thread, NULL, |
4932 | thread_ht_cleanup, (void *) NULL); | |
4933 | if (ret != 0) { | |
4934 | PERROR("pthread_create ht_cleanup"); | |
4935 | goto exit_ht_cleanup; | |
4936 | } | |
4937 | ||
d5b9fd2f | 4938 | /* Create health-check thread */ |
44a5e5eb DG |
4939 | ret = pthread_create(&health_thread, NULL, |
4940 | thread_manage_health, (void *) NULL); | |
4941 | if (ret != 0) { | |
4942 | PERROR("pthread_create health"); | |
4943 | goto exit_health; | |
4944 | } | |
4945 | ||
cf3af59e | 4946 | /* Create thread to manage the client socket */ |
099e26bd DG |
4947 | ret = pthread_create(&client_thread, NULL, |
4948 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4949 | if (ret != 0) { |
76d7553f | 4950 | PERROR("pthread_create clients"); |
cf3af59e MD |
4951 | goto exit_client; |
4952 | } | |
fac6795d | 4953 | |
099e26bd DG |
4954 | /* Create thread to dispatch registration */ |
4955 | ret = pthread_create(&dispatch_thread, NULL, | |
4956 | thread_dispatch_ust_registration, (void *) NULL); | |
4957 | if (ret != 0) { | |
76d7553f | 4958 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4959 | goto exit_dispatch; |
4960 | } | |
4961 | ||
4962 | /* Create thread to manage application registration. */ | |
4963 | ret = pthread_create(®_apps_thread, NULL, | |
4964 | thread_registration_apps, (void *) NULL); | |
4965 | if (ret != 0) { | |
76d7553f | 4966 | PERROR("pthread_create registration"); |
099e26bd DG |
4967 | goto exit_reg_apps; |
4968 | } | |
4969 | ||
cf3af59e | 4970 | /* Create thread to manage application socket */ |
54d01ffb DG |
4971 | ret = pthread_create(&apps_thread, NULL, |
4972 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4973 | if (ret != 0) { |
d0b96690 DG |
4974 | PERROR("pthread_create apps"); |
4975 | goto exit_apps; | |
4976 | } | |
4977 | ||
4978 | /* Create thread to manage application notify socket */ | |
4979 | ret = pthread_create(&apps_notify_thread, NULL, | |
4980 | ust_thread_manage_notify, (void *) NULL); | |
4981 | if (ret != 0) { | |
76d7553f | 4982 | PERROR("pthread_create apps"); |
9563b0ad | 4983 | goto exit_apps_notify; |
cf3af59e | 4984 | } |
fac6795d | 4985 | |
4d076222 DG |
4986 | /* Create JUL registration thread. */ |
4987 | ret = pthread_create(&jul_reg_thread, NULL, | |
4988 | jul_thread_manage_registration, (void *) NULL); | |
4989 | if (ret != 0) { | |
4990 | PERROR("pthread_create apps"); | |
4991 | goto exit_jul_reg; | |
4992 | } | |
4993 | ||
6620da75 DG |
4994 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4995 | if (is_root && !opt_no_kernel) { | |
4996 | /* Create kernel thread to manage kernel event */ | |
4997 | ret = pthread_create(&kernel_thread, NULL, | |
4998 | thread_manage_kernel, (void *) NULL); | |
4999 | if (ret != 0) { | |
5000 | PERROR("pthread_create kernel"); | |
5001 | goto exit_kernel; | |
5002 | } | |
7a485870 | 5003 | |
6620da75 DG |
5004 | ret = pthread_join(kernel_thread, &status); |
5005 | if (ret != 0) { | |
5006 | PERROR("pthread_join"); | |
5007 | goto error; /* join error, exit without cleanup */ | |
5008 | } | |
fac6795d DG |
5009 | } |
5010 | ||
cf3af59e | 5011 | exit_kernel: |
4d076222 DG |
5012 | ret = pthread_join(jul_reg_thread, &status); |
5013 | if (ret != 0) { | |
5014 | PERROR("pthread_join JUL"); | |
5015 | goto error; /* join error, exit without cleanup */ | |
5016 | } | |
5017 | ||
5018 | exit_jul_reg: | |
9563b0ad DG |
5019 | ret = pthread_join(apps_notify_thread, &status); |
5020 | if (ret != 0) { | |
5021 | PERROR("pthread_join apps notify"); | |
5022 | goto error; /* join error, exit without cleanup */ | |
5023 | } | |
5024 | ||
5025 | exit_apps_notify: | |
cf3af59e MD |
5026 | ret = pthread_join(apps_thread, &status); |
5027 | if (ret != 0) { | |
9563b0ad | 5028 | PERROR("pthread_join apps"); |
cf3af59e MD |
5029 | goto error; /* join error, exit without cleanup */ |
5030 | } | |
fac6795d | 5031 | |
4ccd8c8f | 5032 | |
cf3af59e | 5033 | exit_apps: |
099e26bd DG |
5034 | ret = pthread_join(reg_apps_thread, &status); |
5035 | if (ret != 0) { | |
76d7553f | 5036 | PERROR("pthread_join"); |
099e26bd DG |
5037 | goto error; /* join error, exit without cleanup */ |
5038 | } | |
5039 | ||
5040 | exit_reg_apps: | |
5041 | ret = pthread_join(dispatch_thread, &status); | |
5042 | if (ret != 0) { | |
76d7553f | 5043 | PERROR("pthread_join"); |
099e26bd DG |
5044 | goto error; /* join error, exit without cleanup */ |
5045 | } | |
5046 | ||
5047 | exit_dispatch: | |
cf3af59e MD |
5048 | ret = pthread_join(client_thread, &status); |
5049 | if (ret != 0) { | |
76d7553f | 5050 | PERROR("pthread_join"); |
cf3af59e MD |
5051 | goto error; /* join error, exit without cleanup */ |
5052 | } | |
5053 | ||
3bd1e081 | 5054 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5055 | if (ret != 0) { |
76d7553f | 5056 | PERROR("join_consumer"); |
cf3af59e MD |
5057 | goto error; /* join error, exit without cleanup */ |
5058 | } | |
a88df331 | 5059 | |
06f525de DG |
5060 | ret = join_consumer_thread(&ustconsumer32_data); |
5061 | if (ret != 0) { | |
5062 | PERROR("join_consumer ust32"); | |
5063 | goto error; /* join error, exit without cleanup */ | |
5064 | } | |
5065 | ||
5066 | ret = join_consumer_thread(&ustconsumer64_data); | |
5067 | if (ret != 0) { | |
5068 | PERROR("join_consumer ust64"); | |
5069 | goto error; /* join error, exit without cleanup */ | |
5070 | } | |
5071 | ||
cf3af59e | 5072 | exit_client: |
06f525de DG |
5073 | ret = pthread_join(health_thread, &status); |
5074 | if (ret != 0) { | |
5075 | PERROR("pthread_join health thread"); | |
5076 | goto error; /* join error, exit without cleanup */ | |
5077 | } | |
5078 | ||
44a5e5eb | 5079 | exit_health: |
0b2dc8df MD |
5080 | ret = pthread_join(ht_cleanup_thread, &status); |
5081 | if (ret != 0) { | |
5082 | PERROR("pthread_join ht cleanup thread"); | |
5083 | goto error; /* join error, exit without cleanup */ | |
5084 | } | |
5085 | exit_ht_cleanup: | |
8782cc74 MD |
5086 | health_app_destroy(health_sessiond); |
5087 | exit_health_sessiond_cleanup: | |
a88df331 | 5088 | exit: |
cf3af59e MD |
5089 | /* |
5090 | * cleanup() is called when no other thread is running. | |
5091 | */ | |
f6a9efaa | 5092 | rcu_thread_online(); |
cf3af59e | 5093 | cleanup(); |
f6a9efaa DG |
5094 | rcu_thread_offline(); |
5095 | rcu_unregister_thread(); | |
67e40797 | 5096 | if (!ret) { |
cf3af59e | 5097 | exit(EXIT_SUCCESS); |
67e40797 | 5098 | } |
cf3af59e | 5099 | error: |
5e16da05 | 5100 | exit(EXIT_FAILURE); |
fac6795d | 5101 | } |