Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
54d01ffb DG |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; only version 2 of the License. | |
91d76f53 | 8 | * |
54d01ffb DG |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
91d76f53 | 13 | * |
54d01ffb DG |
14 | * You should have received a copy of the GNU General Public License along with |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
20 | #include <fcntl.h> | |
21 | #include <getopt.h> | |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
8c0faa1d | 25 | #include <semaphore.h> |
fac6795d DG |
26 | #include <signal.h> |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.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 DG |
36 | #include <sys/wait.h> |
37 | #include <urcu/futex.h> | |
fac6795d | 38 | #include <unistd.h> |
3bd1e081 | 39 | #include <config.h> |
fac6795d | 40 | |
3bd1e081 | 41 | #include <lttng-consumerd.h> |
e88129fc | 42 | #include <lttng-sessiond-comm.h> |
3bd1e081 | 43 | #include <lttng/lttng-consumer.h> |
2bdd86d4 MD |
44 | |
45 | #ifdef CONFIG_LTTNG_TOOLS_HAVE_UST | |
46 | #include <ust/lttng-ust-ctl.h> | |
47 | #else | |
48 | #include "lttng-ust-ctl.h" | |
49 | #endif | |
50 | ||
51 | ||
1e307fab | 52 | #include <lttngerr.h> |
fac6795d | 53 | |
54d01ffb | 54 | #include "channel.h" |
5eb91c98 | 55 | #include "compat/poll.h" |
099e26bd | 56 | #include "context.h" |
54d01ffb | 57 | #include "event.h" |
099e26bd | 58 | #include "futex.h" |
f6a9efaa | 59 | #include "hashtable.h" |
20fe2104 | 60 | #include "kernel-ctl.h" |
1e307fab | 61 | #include "ltt-sessiond.h" |
0fdd1e2c | 62 | #include "shm.h" |
56fff090 | 63 | #include "ust-app.h" |
1e307fab | 64 | #include "ust-ctl.h" |
8e68d1c8 | 65 | #include "utils.h" |
0177d773 | 66 | #include "ust-ctl.h" |
fac6795d | 67 | |
3bd1e081 MD |
68 | struct consumer_data { |
69 | enum lttng_consumer_type type; | |
70 | ||
71 | pthread_t thread; /* Worker thread interacting with the consumer */ | |
72 | sem_t sem; | |
73 | ||
74 | /* Mutex to control consumerd pid assignation */ | |
75 | pthread_mutex_t pid_mutex; | |
76 | pid_t pid; | |
77 | ||
78 | int err_sock; | |
79 | int cmd_sock; | |
80 | ||
81 | /* consumer error and command Unix socket path */ | |
82 | char err_unix_sock_path[PATH_MAX]; | |
83 | char cmd_unix_sock_path[PATH_MAX]; | |
84 | }; | |
85 | ||
75462a81 | 86 | /* Const values */ |
686204ab | 87 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
64a23ac4 | 88 | const char default_tracing_group[] = LTTNG_DEFAULT_TRACING_GROUP; |
686204ab MD |
89 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
90 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
91 | ||
fac6795d | 92 | /* Variables */ |
1d4b027a | 93 | int opt_verbose; /* Not static for lttngerr.h */ |
3bd1e081 | 94 | int opt_verbose_consumer; /* Not static for lttngerr.h */ |
1d4b027a | 95 | int opt_quiet; /* Not static for lttngerr.h */ |
d063d709 | 96 | |
fac6795d DG |
97 | const char *progname; |
98 | const char *opt_tracing_group; | |
5b8719f5 | 99 | static int opt_sig_parent; |
fac6795d DG |
100 | static int opt_daemon; |
101 | static int is_root; /* Set to 1 if the daemon is running as root */ | |
1d4b027a | 102 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
3bd1e081 MD |
103 | |
104 | /* Consumer daemon specific control data */ | |
105 | static struct consumer_data kconsumer_data = { | |
106 | .type = LTTNG_CONSUMER_KERNEL, | |
107 | }; | |
108 | static struct consumer_data ustconsumer_data = { | |
109 | .type = LTTNG_CONSUMER_UST, | |
110 | }; | |
111 | ||
099e26bd | 112 | static int dispatch_thread_exit; |
fac6795d | 113 | |
54d01ffb DG |
114 | /* Global application Unix socket path */ |
115 | static char apps_unix_sock_path[PATH_MAX]; | |
116 | /* Global client Unix socket path */ | |
117 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
118 | /* global wait shm path for UST */ |
119 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 120 | |
1d4b027a | 121 | /* Sockets and FDs */ |
d6f42150 DG |
122 | static int client_sock; |
123 | static int apps_sock; | |
20fe2104 | 124 | static int kernel_tracer_fd; |
7a485870 | 125 | static int kernel_poll_pipe[2]; |
1d4b027a | 126 | |
273ea72c DG |
127 | /* |
128 | * Quit pipe for all threads. This permits a single cancellation point | |
129 | * for all threads when receiving an event on the pipe. | |
130 | */ | |
131 | static int thread_quit_pipe[2]; | |
132 | ||
099e26bd DG |
133 | /* |
134 | * This pipe is used to inform the thread managing application communication | |
135 | * that a command is queued and ready to be processed. | |
136 | */ | |
137 | static int apps_cmd_pipe[2]; | |
138 | ||
1d4b027a | 139 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 140 | static pthread_t apps_thread; |
099e26bd | 141 | static pthread_t reg_apps_thread; |
1d4b027a | 142 | static pthread_t client_thread; |
7a485870 | 143 | static pthread_t kernel_thread; |
099e26bd | 144 | static pthread_t dispatch_thread; |
5eb91c98 | 145 | |
fac6795d | 146 | |
099e26bd DG |
147 | /* |
148 | * UST registration command queue. This queue is tied with a futex and uses a N | |
149 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
150 | * | |
151 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
152 | * this queue and the wait/wake scheme. | |
153 | */ | |
154 | static struct ust_cmd_queue ust_cmd_queue; | |
155 | ||
b5541356 DG |
156 | /* |
157 | * Pointer initialized before thread creation. | |
158 | * | |
159 | * This points to the tracing session list containing the session count and a | |
160 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
161 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 162 | * |
d063d709 | 163 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 164 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
165 | */ |
166 | static struct ltt_session_list *session_list_ptr; | |
167 | ||
5eb91c98 DG |
168 | /* |
169 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
170 | */ | |
171 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
172 | unsigned int size) | |
173 | { | |
174 | int ret; | |
175 | ||
176 | if (events == NULL || size == 0) { | |
177 | ret = -1; | |
178 | goto error; | |
179 | } | |
180 | ||
181 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
182 | if (ret < 0) { | |
183 | goto error; | |
184 | } | |
185 | ||
186 | /* Add quit pipe */ | |
187 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
188 | if (ret < 0) { | |
189 | goto error; | |
190 | } | |
191 | ||
192 | return 0; | |
193 | ||
194 | error: | |
195 | return ret; | |
196 | } | |
197 | ||
198 | /* | |
199 | * Check if the thread quit pipe was triggered. | |
200 | * | |
201 | * Return 1 if it was triggered else 0; | |
202 | */ | |
203 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
204 | { | |
205 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
206 | return 1; | |
207 | } | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
0fdd1e2c DG |
212 | /* |
213 | * Remove modules in reverse load order. | |
214 | */ | |
215 | static int modprobe_remove_kernel_modules(void) | |
216 | { | |
217 | int ret = 0, i; | |
218 | char modprobe[256]; | |
219 | ||
220 | for (i = ARRAY_SIZE(kernel_modules_list) - 1; i >= 0; i--) { | |
221 | ret = snprintf(modprobe, sizeof(modprobe), | |
222 | "/sbin/modprobe --remove --quiet %s", | |
223 | kernel_modules_list[i].name); | |
224 | if (ret < 0) { | |
225 | perror("snprintf modprobe --remove"); | |
226 | goto error; | |
227 | } | |
228 | modprobe[sizeof(modprobe) - 1] = '\0'; | |
229 | ret = system(modprobe); | |
230 | if (ret == -1) { | |
231 | ERR("Unable to launch modprobe --remove for module %s", | |
232 | kernel_modules_list[i].name); | |
233 | } else if (kernel_modules_list[i].required | |
234 | && WEXITSTATUS(ret) != 0) { | |
235 | ERR("Unable to remove module %s", | |
236 | kernel_modules_list[i].name); | |
237 | } else { | |
238 | DBG("Modprobe removal successful %s", | |
239 | kernel_modules_list[i].name); | |
240 | } | |
241 | } | |
242 | ||
243 | error: | |
244 | return ret; | |
245 | } | |
246 | ||
247 | /* | |
248 | * Return group ID of the tracing group or -1 if not found. | |
249 | */ | |
996b65c8 MD |
250 | static gid_t allowed_group(void) |
251 | { | |
252 | struct group *grp; | |
253 | ||
274e143b MD |
254 | if (opt_tracing_group) { |
255 | grp = getgrnam(opt_tracing_group); | |
256 | } else { | |
257 | grp = getgrnam(default_tracing_group); | |
258 | } | |
996b65c8 MD |
259 | if (!grp) { |
260 | return -1; | |
261 | } else { | |
262 | return grp->gr_gid; | |
263 | } | |
264 | } | |
265 | ||
273ea72c | 266 | /* |
5eb91c98 | 267 | * Init thread quit pipe. |
273ea72c DG |
268 | * |
269 | * Return -1 on error or 0 if all pipes are created. | |
270 | */ | |
271 | static int init_thread_quit_pipe(void) | |
272 | { | |
273 | int ret; | |
274 | ||
275 | ret = pipe2(thread_quit_pipe, O_CLOEXEC); | |
276 | if (ret < 0) { | |
277 | perror("thread quit pipe"); | |
278 | goto error; | |
279 | } | |
280 | ||
281 | error: | |
282 | return ret; | |
283 | } | |
284 | ||
fac6795d | 285 | /* |
d063d709 DG |
286 | * Complete teardown of a kernel session. This free all data structure related |
287 | * to a kernel session and update counter. | |
fac6795d | 288 | */ |
1d4b027a | 289 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 290 | { |
1d4b027a DG |
291 | if (session->kernel_session != NULL) { |
292 | DBG("Tearing down kernel session"); | |
d9800920 DG |
293 | |
294 | /* | |
295 | * If a custom kernel consumer was registered, close the socket before | |
296 | * tearing down the complete kernel session structure | |
297 | */ | |
3bd1e081 | 298 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { |
d9800920 DG |
299 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); |
300 | } | |
301 | ||
62499ad6 | 302 | trace_kernel_destroy_session(session->kernel_session); |
1d4b027a DG |
303 | /* Extra precaution */ |
304 | session->kernel_session = NULL; | |
fac6795d | 305 | } |
fac6795d DG |
306 | } |
307 | ||
f6a9efaa DG |
308 | /* |
309 | * Complete teardown of all UST sessions. This will free everything on his path | |
310 | * and destroy the core essence of all ust sessions :) | |
311 | */ | |
312 | static void teardown_ust_session(struct ltt_session *session) | |
313 | { | |
314 | DBG("Tearing down UST session(s)"); | |
315 | ||
316 | trace_ust_destroy_session(session->ust_session); | |
317 | } | |
318 | ||
099e26bd DG |
319 | /* |
320 | * Stop all threads by closing the thread quit pipe. | |
321 | */ | |
cf3af59e MD |
322 | static void stop_threads(void) |
323 | { | |
5eb91c98 DG |
324 | int ret; |
325 | ||
cf3af59e MD |
326 | /* Stopping all threads */ |
327 | DBG("Terminating all threads"); | |
54d01ffb | 328 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
329 | if (ret < 0) { |
330 | ERR("write error on thread quit pipe"); | |
331 | } | |
332 | ||
099e26bd DG |
333 | /* Dispatch thread */ |
334 | dispatch_thread_exit = 1; | |
335 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
336 | } |
337 | ||
fac6795d | 338 | /* |
d063d709 | 339 | * Cleanup the daemon |
fac6795d | 340 | */ |
cf3af59e | 341 | static void cleanup(void) |
fac6795d | 342 | { |
1d4b027a DG |
343 | int ret; |
344 | char *cmd; | |
af9737e9 | 345 | struct ltt_session *sess, *stmp; |
fac6795d | 346 | |
1d4b027a | 347 | DBG("Cleaning up"); |
e07ae692 | 348 | |
1d4b027a | 349 | /* <fun> */ |
2f50c8a3 | 350 | MSG("%c[%d;%dm*** assert failed *** ==> %c[%dm%c[%d;%dm" |
273ea72c DG |
351 | "Matthew, BEET driven development works!%c[%dm", |
352 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
1d4b027a | 353 | /* </fun> */ |
fac6795d | 354 | |
5eb91c98 DG |
355 | if (is_root) { |
356 | DBG("Removing %s directory", LTTNG_RUNDIR); | |
357 | ret = asprintf(&cmd, "rm -rf " LTTNG_RUNDIR); | |
358 | if (ret < 0) { | |
359 | ERR("asprintf failed. Something is really wrong!"); | |
360 | } | |
5461b305 | 361 | |
5eb91c98 DG |
362 | /* Remove lttng run directory */ |
363 | ret = system(cmd); | |
364 | if (ret < 0) { | |
365 | ERR("Unable to clean " LTTNG_RUNDIR); | |
366 | } | |
1d4b027a | 367 | } |
5461b305 | 368 | |
1d4b027a | 369 | DBG("Cleaning up all session"); |
fac6795d | 370 | |
b5541356 | 371 | /* Destroy session list mutex */ |
273ea72c DG |
372 | if (session_list_ptr != NULL) { |
373 | pthread_mutex_destroy(&session_list_ptr->lock); | |
374 | ||
375 | /* Cleanup ALL session */ | |
54d01ffb DG |
376 | cds_list_for_each_entry_safe(sess, stmp, |
377 | &session_list_ptr->head, list) { | |
273ea72c | 378 | teardown_kernel_session(sess); |
f6a9efaa DG |
379 | teardown_ust_session(sess); |
380 | free(sess); | |
273ea72c DG |
381 | } |
382 | } | |
383 | ||
099e26bd | 384 | DBG("Closing all UST sockets"); |
56fff090 | 385 | ust_app_clean_list(); |
099e26bd | 386 | |
3bd1e081 | 387 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 388 | |
f3ed775e | 389 | DBG("Closing kernel fd"); |
1d4b027a | 390 | close(kernel_tracer_fd); |
ab147185 | 391 | |
2f50c8a3 DG |
392 | if (is_root) { |
393 | DBG("Unloading kernel modules"); | |
394 | modprobe_remove_kernel_modules(); | |
395 | } | |
5eb91c98 DG |
396 | |
397 | close(thread_quit_pipe[0]); | |
398 | close(thread_quit_pipe[1]); | |
fac6795d DG |
399 | } |
400 | ||
e065084a | 401 | /* |
d063d709 | 402 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 403 | * |
d063d709 | 404 | * Return lttcomm error code. |
e065084a DG |
405 | */ |
406 | static int send_unix_sock(int sock, void *buf, size_t len) | |
407 | { | |
408 | /* Check valid length */ | |
409 | if (len <= 0) { | |
410 | return -1; | |
411 | } | |
412 | ||
413 | return lttcomm_send_unix_sock(sock, buf, len); | |
414 | } | |
415 | ||
5461b305 | 416 | /* |
d063d709 | 417 | * Free memory of a command context structure. |
5461b305 | 418 | */ |
a2fb29a5 | 419 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 420 | { |
a2fb29a5 DG |
421 | DBG("Clean command context structure"); |
422 | if (*cmd_ctx) { | |
423 | if ((*cmd_ctx)->llm) { | |
424 | free((*cmd_ctx)->llm); | |
5461b305 | 425 | } |
a2fb29a5 DG |
426 | if ((*cmd_ctx)->lsm) { |
427 | free((*cmd_ctx)->lsm); | |
5461b305 | 428 | } |
a2fb29a5 DG |
429 | free(*cmd_ctx); |
430 | *cmd_ctx = NULL; | |
5461b305 DG |
431 | } |
432 | } | |
433 | ||
f3ed775e | 434 | /* |
d063d709 | 435 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 436 | */ |
2bdd86d4 | 437 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
3bd1e081 | 438 | int sock, struct ltt_kernel_channel *channel) |
f3ed775e DG |
439 | { |
440 | int ret; | |
f3ed775e | 441 | struct ltt_kernel_stream *stream; |
3bd1e081 | 442 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 443 | |
3bd1e081 | 444 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 445 | channel->channel->name); |
f3ed775e | 446 | |
3bd1e081 MD |
447 | /* Send channel */ |
448 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
449 | lkm.u.channel.channel_key = channel->fd; | |
450 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
451 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 452 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 453 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 454 | if (ret < 0) { |
3bd1e081 | 455 | perror("send consumer channel"); |
f3ed775e DG |
456 | goto error; |
457 | } | |
458 | ||
3bd1e081 | 459 | /* Send streams */ |
7a485870 | 460 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
461 | if (!stream->fd) { |
462 | continue; | |
463 | } | |
464 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
465 | lkm.u.stream.channel_key = channel->fd; | |
466 | lkm.u.stream.stream_key = stream->fd; | |
467 | lkm.u.stream.state = stream->state; | |
468 | lkm.u.stream.output = channel->channel->attr.output; | |
469 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
470 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); | |
471 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
472 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
473 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
474 | if (ret < 0) { | |
475 | perror("send consumer stream"); | |
476 | goto error; | |
477 | } | |
478 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
479 | if (ret < 0) { | |
480 | perror("send consumer stream ancillary data"); | |
481 | goto error; | |
f3ed775e DG |
482 | } |
483 | } | |
484 | ||
3bd1e081 | 485 | DBG("consumer channel streams sent"); |
f3ed775e DG |
486 | |
487 | return 0; | |
488 | ||
489 | error: | |
490 | return ret; | |
491 | } | |
492 | ||
2bdd86d4 MD |
493 | /* |
494 | * Send all stream fds of UST channel to the consumer. | |
495 | */ | |
496 | static int send_ustconsumer_channel_streams(struct consumer_data *consumer_data, | |
497 | int sock, struct ltt_ust_channel *channel) | |
498 | { | |
499 | int ret, fds[2]; | |
500 | struct ltt_ust_stream *stream; | |
501 | struct lttcomm_consumer_msg lum; | |
502 | ||
503 | DBG("Sending streams of channel %s to UST consumer", | |
504 | channel->name); | |
505 | ||
506 | /* Send channel */ | |
507 | lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
508 | /* | |
509 | * We need to keep shm_fd open to make sure this key stays | |
510 | * unique within the session daemon. | |
511 | */ | |
512 | lum.u.channel.channel_key = channel->obj->shm_fd; | |
513 | lum.u.channel.max_sb_size = channel->attr.subbuf_size; | |
514 | lum.u.channel.mmap_len = channel->obj->memory_map_size; | |
515 | DBG("Sending channel %d to consumer", lum.u.channel.channel_key); | |
516 | ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum)); | |
517 | if (ret < 0) { | |
518 | perror("send consumer channel"); | |
519 | goto error; | |
520 | } | |
521 | fds[0] = channel->obj->shm_fd; | |
522 | fds[1] = channel->obj->wait_fd; | |
523 | ret = lttcomm_send_fds_unix_sock(sock, fds, 2); | |
524 | if (ret < 0) { | |
525 | perror("send consumer channel ancillary data"); | |
526 | goto error; | |
527 | } | |
528 | ||
529 | /* Send streams */ | |
530 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { | |
531 | int fds[2]; | |
532 | ||
533 | if (!stream->obj->shm_fd) { | |
534 | continue; | |
535 | } | |
536 | lum.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
537 | lum.u.stream.channel_key = channel->obj->shm_fd; | |
538 | lum.u.stream.stream_key = stream->obj->shm_fd; | |
539 | lum.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
540 | lum.u.stream.output = channel->attr.output; | |
541 | lum.u.stream.mmap_len = stream->obj->memory_map_size; | |
542 | strncpy(lum.u.stream.path_name, stream->pathname, PATH_MAX - 1); | |
543 | lum.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
544 | DBG("Sending stream %d to consumer", lum.u.stream.stream_key); | |
545 | ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum)); | |
546 | if (ret < 0) { | |
547 | perror("send consumer stream"); | |
548 | goto error; | |
549 | } | |
550 | fds[0] = stream->obj->shm_fd; | |
551 | fds[1] = stream->obj->wait_fd; | |
552 | ret = lttcomm_send_fds_unix_sock(sock, fds, 2); | |
553 | if (ret < 0) { | |
554 | perror("send consumer stream ancillary data"); | |
555 | goto error; | |
556 | } | |
557 | } | |
558 | ||
559 | DBG("consumer channel streams sent"); | |
560 | ||
561 | return 0; | |
562 | ||
563 | error: | |
564 | return ret; | |
565 | } | |
566 | ||
f3ed775e | 567 | /* |
d063d709 | 568 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 569 | */ |
2bdd86d4 | 570 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 571 | struct ltt_kernel_session *session) |
f3ed775e DG |
572 | { |
573 | int ret; | |
574 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
575 | struct lttcomm_consumer_msg lkm; |
576 | int sock = session->consumer_fd; | |
7a485870 DG |
577 | |
578 | DBG("Sending metadata stream fd"); | |
579 | ||
2bdd86d4 | 580 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 581 | if (session->consumer_fd == 0) { |
3bd1e081 | 582 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
583 | } |
584 | ||
7a485870 | 585 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
586 | /* Send metadata channel fd */ |
587 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
588 | lkm.u.channel.channel_key = session->metadata->fd; | |
589 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
590 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
591 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
592 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
593 | if (ret < 0) { | |
594 | perror("send consumer channel"); | |
595 | goto error; | |
596 | } | |
597 | ||
598 | /* Send metadata stream fd */ | |
599 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
600 | lkm.u.stream.channel_key = session->metadata->fd; | |
601 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
602 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
603 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
604 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
605 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); | |
606 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
607 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
608 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
609 | if (ret < 0) { | |
610 | perror("send consumer stream"); | |
611 | goto error; | |
612 | } | |
613 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 614 | if (ret < 0) { |
3bd1e081 | 615 | perror("send consumer stream"); |
7a485870 DG |
616 | goto error; |
617 | } | |
618 | } | |
f3ed775e | 619 | |
f3ed775e | 620 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
2bdd86d4 MD |
621 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan); |
622 | if (ret < 0) { | |
623 | goto error; | |
624 | } | |
625 | } | |
626 | ||
627 | DBG("consumer fds (metadata and channel streams) sent"); | |
628 | ||
629 | return 0; | |
630 | ||
631 | error: | |
632 | return ret; | |
633 | } | |
634 | ||
635 | /* | |
636 | * Send all stream fds of the UST session to the consumer. | |
637 | */ | |
638 | static int send_ustconsumer_session_streams(struct consumer_data *consumer_data, | |
639 | struct ltt_ust_session *session) | |
640 | { | |
641 | int ret; | |
642 | struct ltt_ust_channel *chan; | |
643 | struct lttcomm_consumer_msg lum; | |
644 | int sock = session->consumer_fd; | |
645 | ||
646 | DBG("Sending metadata stream fd"); | |
647 | ||
648 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ | |
649 | if (session->consumer_fd == 0) { | |
650 | session->consumer_fd = consumer_data->cmd_sock; | |
651 | } | |
652 | ||
653 | if (session->metadata->obj->shm_fd != 0) { | |
654 | int fds[2]; | |
655 | ||
656 | /* Send metadata channel fd */ | |
657 | lum.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
658 | lum.u.channel.channel_key = session->metadata->obj->shm_fd; | |
659 | lum.u.channel.max_sb_size = session->metadata->attr.subbuf_size; | |
660 | lum.u.channel.mmap_len = 0; /* for kernel */ | |
661 | DBG("Sending metadata channel %d to consumer", lum.u.stream.stream_key); | |
662 | ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum)); | |
663 | if (ret < 0) { | |
664 | perror("send consumer channel"); | |
665 | goto error; | |
666 | } | |
667 | fds[0] = session->metadata->obj->shm_fd; | |
668 | fds[1] = session->metadata->obj->wait_fd; | |
669 | ret = lttcomm_send_fds_unix_sock(sock, fds, 2); | |
670 | if (ret < 0) { | |
671 | perror("send consumer metadata channel"); | |
672 | goto error; | |
673 | } | |
674 | ||
675 | /* Send metadata stream fd */ | |
676 | lum.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
677 | lum.u.stream.channel_key = session->metadata->obj->shm_fd; | |
678 | lum.u.stream.stream_key = session->metadata->stream_obj->shm_fd; | |
679 | lum.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
680 | lum.u.stream.output = DEFAULT_UST_CHANNEL_OUTPUT; | |
681 | lum.u.stream.mmap_len = session->metadata->stream_obj->memory_map_size; | |
682 | strncpy(lum.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); | |
683 | lum.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
684 | DBG("Sending metadata stream %d to consumer", lum.u.stream.stream_key); | |
685 | ret = lttcomm_send_unix_sock(sock, &lum, sizeof(lum)); | |
686 | if (ret < 0) { | |
687 | perror("send consumer metadata stream"); | |
688 | goto error; | |
689 | } | |
690 | fds[0] = session->metadata->stream_obj->shm_fd; | |
691 | fds[1] = session->metadata->stream_obj->wait_fd; | |
692 | ret = lttcomm_send_fds_unix_sock(sock, fds, 2); | |
693 | if (ret < 0) { | |
694 | perror("send consumer stream"); | |
695 | goto error; | |
696 | } | |
697 | } | |
698 | ||
699 | cds_list_for_each_entry(chan, &session->channels.head, list) { | |
700 | ret = send_ustconsumer_channel_streams(consumer_data, sock, chan); | |
f3ed775e | 701 | if (ret < 0) { |
7a485870 | 702 | goto error; |
f3ed775e DG |
703 | } |
704 | } | |
705 | ||
3bd1e081 | 706 | DBG("consumer fds (metadata and channel streams) sent"); |
7a485870 | 707 | |
f3ed775e DG |
708 | return 0; |
709 | ||
710 | error: | |
711 | return ret; | |
712 | } | |
713 | ||
fac6795d | 714 | /* |
0fdd1e2c | 715 | * Notify UST applications using the shm mmap futex. |
fac6795d | 716 | */ |
0fdd1e2c | 717 | static int notify_ust_apps(int active) |
fac6795d | 718 | { |
0fdd1e2c | 719 | char *wait_shm_mmap; |
fac6795d | 720 | |
0fdd1e2c | 721 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 722 | |
0fdd1e2c DG |
723 | /* See shm.c for this call implying mmap, shm and futex calls */ |
724 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
725 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
726 | goto error; |
727 | } | |
728 | ||
0fdd1e2c DG |
729 | /* Wake waiting process */ |
730 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
731 | ||
732 | /* Apps notified successfully */ | |
733 | return 0; | |
fac6795d DG |
734 | |
735 | error: | |
0fdd1e2c | 736 | return -1; |
fac6795d DG |
737 | } |
738 | ||
e065084a | 739 | /* |
d063d709 DG |
740 | * Setup the outgoing data buffer for the response (llm) by allocating the |
741 | * right amount of memory and copying the original information from the lsm | |
742 | * structure. | |
ca95a216 | 743 | * |
d063d709 | 744 | * Return total size of the buffer pointed by buf. |
ca95a216 | 745 | */ |
5461b305 | 746 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 747 | { |
f3ed775e | 748 | int ret, buf_size; |
ca95a216 | 749 | |
f3ed775e | 750 | buf_size = size; |
5461b305 DG |
751 | |
752 | cmd_ctx->llm = malloc(sizeof(struct lttcomm_lttng_msg) + buf_size); | |
753 | if (cmd_ctx->llm == NULL) { | |
ca95a216 | 754 | perror("malloc"); |
5461b305 | 755 | ret = -ENOMEM; |
ca95a216 DG |
756 | goto error; |
757 | } | |
758 | ||
5461b305 DG |
759 | /* Copy common data */ |
760 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 761 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 762 | |
5461b305 DG |
763 | cmd_ctx->llm->data_size = size; |
764 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
765 | ||
ca95a216 DG |
766 | return buf_size; |
767 | ||
768 | error: | |
769 | return ret; | |
770 | } | |
771 | ||
7a485870 | 772 | /* |
5eb91c98 | 773 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 774 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 775 | */ |
5eb91c98 | 776 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 777 | { |
5eb91c98 | 778 | int ret; |
7a485870 DG |
779 | struct ltt_session *session; |
780 | struct ltt_kernel_channel *channel; | |
781 | ||
5eb91c98 | 782 | DBG("Updating kernel poll set"); |
7a485870 | 783 | |
54d01ffb | 784 | session_lock_list(); |
b5541356 | 785 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 786 | session_lock(session); |
7a485870 | 787 | if (session->kernel_session == NULL) { |
54d01ffb | 788 | session_unlock(session); |
7a485870 DG |
789 | continue; |
790 | } | |
7a485870 | 791 | |
54d01ffb DG |
792 | cds_list_for_each_entry(channel, |
793 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
794 | /* Add channel fd to the kernel poll set */ |
795 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
796 | if (ret < 0) { | |
54d01ffb | 797 | session_unlock(session); |
5eb91c98 DG |
798 | goto error; |
799 | } | |
800 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 801 | } |
54d01ffb | 802 | session_unlock(session); |
7a485870 | 803 | } |
54d01ffb | 804 | session_unlock_list(); |
7a485870 | 805 | |
5eb91c98 | 806 | return 0; |
7a485870 DG |
807 | |
808 | error: | |
54d01ffb | 809 | session_unlock_list(); |
7a485870 DG |
810 | return -1; |
811 | } | |
812 | ||
813 | /* | |
54d01ffb | 814 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 815 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 816 | * |
d063d709 | 817 | * Useful for CPU hotplug feature. |
7a485870 | 818 | */ |
2bdd86d4 | 819 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
820 | { |
821 | int ret = 0; | |
822 | struct ltt_session *session; | |
823 | struct ltt_kernel_channel *channel; | |
824 | ||
825 | DBG("Updating kernel streams for channel fd %d", fd); | |
826 | ||
54d01ffb | 827 | session_lock_list(); |
b5541356 | 828 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 829 | session_lock(session); |
7a485870 | 830 | if (session->kernel_session == NULL) { |
54d01ffb | 831 | session_unlock(session); |
7a485870 DG |
832 | continue; |
833 | } | |
d9800920 DG |
834 | |
835 | /* This is not suppose to be 0 but this is an extra security check */ | |
836 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 837 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
838 | } |
839 | ||
5eb91c98 DG |
840 | cds_list_for_each_entry(channel, |
841 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
842 | if (channel->fd == fd) { |
843 | DBG("Channel found, updating kernel streams"); | |
844 | ret = kernel_open_channel_stream(channel); | |
845 | if (ret < 0) { | |
b3c750d2 | 846 | goto error; |
7a485870 | 847 | } |
d9800920 | 848 | |
7a485870 | 849 | /* |
5eb91c98 DG |
850 | * Have we already sent fds to the consumer? If yes, it means |
851 | * that tracing is started so it is safe to send our updated | |
852 | * stream fds. | |
7a485870 | 853 | */ |
3bd1e081 | 854 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 855 | ret = send_kconsumer_channel_streams(consumer_data, |
5eb91c98 | 856 | session->kernel_session->consumer_fd, channel); |
7a485870 | 857 | if (ret < 0) { |
b3c750d2 | 858 | goto error; |
7a485870 DG |
859 | } |
860 | } | |
b3c750d2 | 861 | goto error; |
7a485870 DG |
862 | } |
863 | } | |
54d01ffb | 864 | session_unlock(session); |
7a485870 | 865 | } |
54d01ffb | 866 | session_unlock_list(); |
b3c750d2 | 867 | return ret; |
7a485870 | 868 | |
b3c750d2 | 869 | error: |
54d01ffb DG |
870 | session_unlock(session); |
871 | session_unlock_list(); | |
7a485870 DG |
872 | return ret; |
873 | } | |
874 | ||
875 | /* | |
d063d709 | 876 | * This thread manage event coming from the kernel. |
7a485870 | 877 | * |
d063d709 DG |
878 | * Features supported in this thread: |
879 | * -) CPU Hotplug | |
7a485870 DG |
880 | */ |
881 | static void *thread_manage_kernel(void *data) | |
882 | { | |
5eb91c98 DG |
883 | int ret, i, pollfd, update_poll_flag = 1; |
884 | uint32_t revents, nb_fd; | |
7a485870 | 885 | char tmp; |
5eb91c98 | 886 | struct lttng_poll_event events; |
7a485870 DG |
887 | |
888 | DBG("Thread manage kernel started"); | |
889 | ||
5eb91c98 DG |
890 | ret = create_thread_poll_set(&events, 2); |
891 | if (ret < 0) { | |
892 | goto error; | |
893 | } | |
894 | ||
895 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
896 | if (ret < 0) { | |
897 | goto error; | |
898 | } | |
899 | ||
7a485870 DG |
900 | while (1) { |
901 | if (update_poll_flag == 1) { | |
5f822d0a DG |
902 | /* |
903 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
904 | * quit pipe and the kernel pipe. | |
905 | */ | |
906 | events.nb_fd = 2; | |
907 | ||
5eb91c98 DG |
908 | ret = update_kernel_poll(&events); |
909 | if (ret < 0) { | |
7a485870 DG |
910 | goto error; |
911 | } | |
912 | update_poll_flag = 0; | |
913 | } | |
914 | ||
5eb91c98 DG |
915 | nb_fd = LTTNG_POLL_GETNB(&events); |
916 | ||
917 | DBG("Thread kernel polling on %d fds", nb_fd); | |
918 | ||
919 | /* Zeroed the poll events */ | |
920 | lttng_poll_reset(&events); | |
7a485870 DG |
921 | |
922 | /* Poll infinite value of time */ | |
5eb91c98 | 923 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 924 | if (ret < 0) { |
7a485870 DG |
925 | goto error; |
926 | } else if (ret == 0) { | |
927 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
928 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
929 | "This should not have happened! Continuing..."); | |
7a485870 DG |
930 | continue; |
931 | } | |
932 | ||
5eb91c98 DG |
933 | for (i = 0; i < nb_fd; i++) { |
934 | /* Fetch once the poll data */ | |
935 | revents = LTTNG_POLL_GETEV(&events, i); | |
936 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 937 | |
5eb91c98 DG |
938 | /* Thread quit pipe has been closed. Killing thread. */ |
939 | ret = check_thread_quit_pipe(pollfd, revents); | |
940 | if (ret) { | |
941 | goto error; | |
942 | } | |
7a485870 | 943 | |
5eb91c98 DG |
944 | /* Check for data on kernel pipe */ |
945 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
946 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
947 | update_poll_flag = 1; | |
948 | continue; | |
949 | } else { | |
950 | /* | |
951 | * New CPU detected by the kernel. Adding kernel stream to | |
952 | * kernel session and updating the kernel consumer | |
953 | */ | |
954 | if (revents & LPOLLIN) { | |
2bdd86d4 | 955 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
956 | if (ret < 0) { |
957 | continue; | |
958 | } | |
959 | break; | |
960 | /* | |
961 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
962 | * and unregister kernel stream at this point. | |
963 | */ | |
7a485870 | 964 | } |
7a485870 DG |
965 | } |
966 | } | |
967 | } | |
968 | ||
969 | error: | |
970 | DBG("Kernel thread dying"); | |
273ea72c DG |
971 | close(kernel_poll_pipe[0]); |
972 | close(kernel_poll_pipe[1]); | |
5eb91c98 DG |
973 | |
974 | lttng_poll_clean(&events); | |
975 | ||
7a485870 DG |
976 | return NULL; |
977 | } | |
978 | ||
1d4b027a | 979 | /* |
3bd1e081 | 980 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 981 | */ |
3bd1e081 | 982 | static void *thread_manage_consumer(void *data) |
1d4b027a | 983 | { |
5eb91c98 DG |
984 | int sock = 0, i, ret, pollfd; |
985 | uint32_t revents, nb_fd; | |
1d4b027a | 986 | enum lttcomm_return_code code; |
5eb91c98 | 987 | struct lttng_poll_event events; |
3bd1e081 | 988 | struct consumer_data *consumer_data = data; |
1d4b027a | 989 | |
3bd1e081 | 990 | DBG("[thread] Manage consumer started"); |
1d4b027a | 991 | |
3bd1e081 | 992 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
993 | if (ret < 0) { |
994 | goto error; | |
995 | } | |
996 | ||
5eb91c98 DG |
997 | /* |
998 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
999 | * Nothing more will be added to this poll set. | |
1000 | */ | |
1001 | ret = create_thread_poll_set(&events, 2); | |
1002 | if (ret < 0) { | |
1003 | goto error; | |
1004 | } | |
273ea72c | 1005 | |
3bd1e081 | 1006 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1007 | if (ret < 0) { |
1008 | goto error; | |
1009 | } | |
1010 | ||
1011 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
1012 | |
1013 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 1014 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1015 | if (ret < 0) { |
273ea72c DG |
1016 | goto error; |
1017 | } | |
1018 | ||
5eb91c98 DG |
1019 | for (i = 0; i < nb_fd; i++) { |
1020 | /* Fetch once the poll data */ | |
1021 | revents = LTTNG_POLL_GETEV(&events, i); | |
1022 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1023 | ||
1024 | /* Thread quit pipe has been closed. Killing thread. */ | |
1025 | ret = check_thread_quit_pipe(pollfd, revents); | |
1026 | if (ret) { | |
1027 | goto error; | |
1028 | } | |
1029 | ||
1030 | /* Event on the registration socket */ | |
3bd1e081 | 1031 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1032 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1033 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1034 | goto error; |
1035 | } | |
1036 | } | |
273ea72c DG |
1037 | } |
1038 | ||
3bd1e081 | 1039 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1040 | if (sock < 0) { |
1041 | goto error; | |
1042 | } | |
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 | ||
3bd1e081 MD |
1053 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
1054 | consumer_data->cmd_sock = | |
1055 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
1056 | if (consumer_data->cmd_sock < 0) { | |
1057 | sem_post(&consumer_data->sem); | |
1058 | perror("consumer connect"); | |
1d4b027a DG |
1059 | goto error; |
1060 | } | |
1061 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
1062 | sem_post(&consumer_data->sem); |
1063 | DBG("consumer command socket ready"); | |
1d4b027a | 1064 | } else { |
3bd1e081 | 1065 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1066 | lttcomm_get_readable_code(-code)); |
1067 | goto error; | |
1068 | } | |
1069 | ||
54d01ffb | 1070 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 1071 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1072 | if (ret < 0) { |
72079cae DG |
1073 | goto error; |
1074 | } | |
1075 | ||
5eb91c98 DG |
1076 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1077 | if (ret < 0) { | |
72079cae | 1078 | goto error; |
5eb91c98 DG |
1079 | } |
1080 | ||
1081 | /* Update number of fd */ | |
1082 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1083 | ||
1084 | /* Inifinite blocking call, waiting for transmission */ | |
1085 | ret = lttng_poll_wait(&events, -1); | |
1086 | if (ret < 0) { | |
72079cae DG |
1087 | goto error; |
1088 | } | |
1089 | ||
5eb91c98 DG |
1090 | for (i = 0; i < nb_fd; i++) { |
1091 | /* Fetch once the poll data */ | |
1092 | revents = LTTNG_POLL_GETEV(&events, i); | |
1093 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1094 | ||
1095 | /* Thread quit pipe has been closed. Killing thread. */ | |
1096 | ret = check_thread_quit_pipe(pollfd, revents); | |
1097 | if (ret) { | |
1098 | goto error; | |
1099 | } | |
1100 | ||
1101 | /* Event on the kconsumerd socket */ | |
1102 | if (pollfd == sock) { | |
1103 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1104 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1105 | goto error; |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ||
712ea556 | 1110 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1111 | ret = lttcomm_recv_unix_sock(sock, &code, |
1112 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1113 | if (ret <= 0) { |
3bd1e081 | 1114 | ERR("consumer closed the command socket"); |
712ea556 | 1115 | goto error; |
6f61d021 | 1116 | } |
1d4b027a | 1117 | |
3bd1e081 | 1118 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1119 | |
1d4b027a | 1120 | error: |
3bd1e081 MD |
1121 | DBG("consumer thread dying"); |
1122 | close(consumer_data->err_sock); | |
1123 | close(consumer_data->cmd_sock); | |
5eb91c98 | 1124 | close(sock); |
273ea72c | 1125 | |
3bd1e081 MD |
1126 | unlink(consumer_data->err_unix_sock_path); |
1127 | unlink(consumer_data->cmd_unix_sock_path); | |
1128 | consumer_data->pid = 0; | |
1d4b027a | 1129 | |
5eb91c98 | 1130 | lttng_poll_clean(&events); |
0177d773 | 1131 | |
5eb91c98 | 1132 | return NULL; |
099e26bd DG |
1133 | } |
1134 | ||
099e26bd DG |
1135 | /* |
1136 | * This thread manage application communication. | |
1d4b027a DG |
1137 | */ |
1138 | static void *thread_manage_apps(void *data) | |
099e26bd | 1139 | { |
5eb91c98 DG |
1140 | int i, ret, pollfd; |
1141 | uint32_t revents, nb_fd; | |
099e26bd | 1142 | struct ust_command ust_cmd; |
5eb91c98 | 1143 | struct lttng_poll_event events; |
099e26bd DG |
1144 | |
1145 | DBG("[thread] Manage application started"); | |
1146 | ||
f6a9efaa DG |
1147 | rcu_register_thread(); |
1148 | rcu_thread_online(); | |
1149 | ||
5eb91c98 DG |
1150 | ret = create_thread_poll_set(&events, 2); |
1151 | if (ret < 0) { | |
1152 | goto error; | |
1153 | } | |
099e26bd | 1154 | |
5eb91c98 DG |
1155 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1156 | if (ret < 0) { | |
1157 | goto error; | |
1158 | } | |
099e26bd | 1159 | |
5eb91c98 DG |
1160 | while (1) { |
1161 | /* Zeroed the events structure */ | |
1162 | lttng_poll_reset(&events); | |
0177d773 | 1163 | |
5eb91c98 | 1164 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1165 | |
1166 | DBG("Apps thread polling on %d fds", nb_fd); | |
1167 | ||
1168 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 1169 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1170 | if (ret < 0) { |
099e26bd DG |
1171 | goto error; |
1172 | } | |
1173 | ||
5eb91c98 DG |
1174 | for (i = 0; i < nb_fd; i++) { |
1175 | /* Fetch once the poll data */ | |
1176 | revents = LTTNG_POLL_GETEV(&events, i); | |
1177 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1178 | ||
1179 | /* Thread quit pipe has been closed. Killing thread. */ | |
1180 | ret = check_thread_quit_pipe(pollfd, revents); | |
1181 | if (ret) { | |
099e26bd | 1182 | goto error; |
5eb91c98 | 1183 | } |
099e26bd | 1184 | |
5eb91c98 DG |
1185 | /* Inspect the apps cmd pipe */ |
1186 | if (pollfd == apps_cmd_pipe[0]) { | |
1187 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1188 | ERR("Apps command pipe error"); | |
0177d773 | 1189 | goto error; |
5eb91c98 DG |
1190 | } else if (revents & LPOLLIN) { |
1191 | /* Empty pipe */ | |
1192 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1193 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
1194 | perror("read apps cmd pipe"); | |
1195 | goto error; | |
1196 | } | |
099e26bd | 1197 | |
5eb91c98 | 1198 | /* Register applicaton to the session daemon */ |
56fff090 | 1199 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1200 | ust_cmd.sock); |
5eb91c98 DG |
1201 | if (ret < 0) { |
1202 | /* Only critical ENOMEM error can be returned here */ | |
1203 | goto error; | |
1204 | } | |
1205 | ||
1206 | ret = ustctl_register_done(ust_cmd.sock); | |
1207 | if (ret < 0) { | |
1208 | /* | |
1209 | * If the registration is not possible, we simply | |
1210 | * unregister the apps and continue | |
1211 | */ | |
56fff090 | 1212 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1213 | } else { |
1214 | /* | |
1215 | * We just need here to monitor the close of the UST | |
1216 | * socket and poll set monitor those by default. | |
1217 | */ | |
1218 | ret = lttng_poll_add(&events, ust_cmd.sock, 0); | |
1219 | if (ret < 0) { | |
1220 | goto error; | |
1221 | } | |
1222 | ||
54d01ffb DG |
1223 | DBG("Apps with sock %d added to poll set", |
1224 | ust_cmd.sock); | |
5eb91c98 DG |
1225 | } |
1226 | break; | |
0177d773 | 1227 | } |
5eb91c98 DG |
1228 | } else { |
1229 | /* | |
54d01ffb DG |
1230 | * At this point, we know that a registered application made |
1231 | * the event at poll_wait. | |
5eb91c98 DG |
1232 | */ |
1233 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1234 | /* Removing from the poll set */ | |
1235 | ret = lttng_poll_del(&events, pollfd); | |
1236 | if (ret < 0) { | |
1237 | goto error; | |
1238 | } | |
099e26bd | 1239 | |
5eb91c98 | 1240 | /* Socket closed */ |
56fff090 | 1241 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1242 | break; |
1243 | } | |
099e26bd DG |
1244 | } |
1245 | } | |
099e26bd DG |
1246 | } |
1247 | ||
1248 | error: | |
1249 | DBG("Application communication apps dying"); | |
1250 | close(apps_cmd_pipe[0]); | |
1251 | close(apps_cmd_pipe[1]); | |
1252 | ||
5eb91c98 | 1253 | lttng_poll_clean(&events); |
099e26bd | 1254 | |
f6a9efaa DG |
1255 | rcu_thread_offline(); |
1256 | rcu_unregister_thread(); | |
099e26bd DG |
1257 | return NULL; |
1258 | } | |
1259 | ||
1260 | /* | |
1261 | * Dispatch request from the registration threads to the application | |
1262 | * communication thread. | |
1263 | */ | |
1264 | static void *thread_dispatch_ust_registration(void *data) | |
1265 | { | |
1266 | int ret; | |
1267 | struct cds_wfq_node *node; | |
1268 | struct ust_command *ust_cmd = NULL; | |
1269 | ||
1270 | DBG("[thread] Dispatch UST command started"); | |
1271 | ||
1272 | while (!dispatch_thread_exit) { | |
1273 | /* Atomically prepare the queue futex */ | |
1274 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1275 | ||
1276 | do { | |
1277 | /* Dequeue command for registration */ | |
1278 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1279 | if (node == NULL) { | |
00a17c97 | 1280 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1281 | /* Continue thread execution */ |
1282 | break; | |
1283 | } | |
1284 | ||
1285 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1286 | ||
2f50c8a3 DG |
1287 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1288 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1289 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1290 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1291 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1292 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1293 | /* |
1294 | * Inform apps thread of the new application registration. This | |
1295 | * call is blocking so we can be assured that the data will be read | |
1296 | * at some point in time or wait to the end of the world :) | |
1297 | */ | |
1298 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1299 | sizeof(struct ust_command)); | |
1300 | if (ret < 0) { | |
1301 | perror("write apps cmd pipe"); | |
1302 | if (errno == EBADF) { | |
1303 | /* | |
1304 | * We can't inform the application thread to process | |
1305 | * registration. We will exit or else application | |
1306 | * registration will not occur and tracing will never | |
1307 | * start. | |
1308 | */ | |
1309 | goto error; | |
1310 | } | |
1311 | } | |
1312 | free(ust_cmd); | |
1313 | } while (node != NULL); | |
1314 | ||
1315 | /* Futex wait on queue. Blocking call on futex() */ | |
1316 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1317 | } | |
1318 | ||
1319 | error: | |
1320 | DBG("Dispatch thread dying"); | |
1321 | return NULL; | |
1322 | } | |
1323 | ||
1324 | /* | |
1325 | * This thread manage application registration. | |
1326 | */ | |
1327 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1328 | { |
5eb91c98 DG |
1329 | int sock = 0, i, ret, pollfd; |
1330 | uint32_t revents, nb_fd; | |
1331 | struct lttng_poll_event events; | |
099e26bd DG |
1332 | /* |
1333 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1334 | * freed in the manage apps thread. | |
1335 | */ | |
1336 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1337 | |
099e26bd | 1338 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1339 | |
1340 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1341 | if (ret < 0) { | |
1342 | goto error; | |
1343 | } | |
1344 | ||
5eb91c98 DG |
1345 | /* |
1346 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1347 | * more will be added to this poll set. | |
1348 | */ | |
1349 | ret = create_thread_poll_set(&events, 2); | |
1350 | if (ret < 0) { | |
1351 | goto error; | |
1352 | } | |
273ea72c | 1353 | |
5eb91c98 DG |
1354 | /* Add the application registration socket */ |
1355 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1356 | if (ret < 0) { | |
1357 | goto error; | |
1358 | } | |
273ea72c | 1359 | |
1d4b027a | 1360 | /* Notify all applications to register */ |
0fdd1e2c DG |
1361 | ret = notify_ust_apps(1); |
1362 | if (ret < 0) { | |
1363 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1364 | "Execution continues but there might be problem for already\n" |
1365 | "running applications that wishes to register."); | |
0fdd1e2c | 1366 | } |
1d4b027a DG |
1367 | |
1368 | while (1) { | |
1369 | DBG("Accepting application registration"); | |
273ea72c | 1370 | |
5eb91c98 DG |
1371 | nb_fd = LTTNG_POLL_GETNB(&events); |
1372 | ||
273ea72c | 1373 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 1374 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1375 | if (ret < 0) { |
273ea72c DG |
1376 | goto error; |
1377 | } | |
1378 | ||
5eb91c98 DG |
1379 | for (i = 0; i < nb_fd; i++) { |
1380 | /* Fetch once the poll data */ | |
1381 | revents = LTTNG_POLL_GETEV(&events, i); | |
1382 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1383 | |
5eb91c98 DG |
1384 | /* Thread quit pipe has been closed. Killing thread. */ |
1385 | ret = check_thread_quit_pipe(pollfd, revents); | |
1386 | if (ret) { | |
90014c57 DG |
1387 | goto error; |
1388 | } | |
1d4b027a | 1389 | |
5eb91c98 DG |
1390 | /* Event on the registration socket */ |
1391 | if (pollfd == apps_sock) { | |
1392 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1393 | ERR("Register apps socket poll error"); | |
1394 | goto error; | |
1395 | } else if (revents & LPOLLIN) { | |
1396 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1397 | if (sock < 0) { | |
1398 | goto error; | |
1399 | } | |
099e26bd | 1400 | |
5eb91c98 DG |
1401 | /* Create UST registration command for enqueuing */ |
1402 | ust_cmd = malloc(sizeof(struct ust_command)); | |
1403 | if (ust_cmd == NULL) { | |
1404 | perror("ust command malloc"); | |
1405 | goto error; | |
1406 | } | |
1d4b027a | 1407 | |
5eb91c98 DG |
1408 | /* |
1409 | * Using message-based transmissions to ensure we don't | |
1410 | * have to deal with partially received messages. | |
1411 | */ | |
1412 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1413 | sizeof(struct ust_register_msg)); | |
1414 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1415 | if (ret < 0) { | |
1416 | perror("lttcomm_recv_unix_sock register apps"); | |
1417 | } else { | |
1418 | ERR("Wrong size received on apps register"); | |
1419 | } | |
1420 | free(ust_cmd); | |
1421 | close(sock); | |
1422 | continue; | |
1423 | } | |
099e26bd | 1424 | |
5eb91c98 | 1425 | ust_cmd->sock = sock; |
099e26bd | 1426 | |
5eb91c98 DG |
1427 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1428 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1429 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1430 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1431 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1432 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1433 | |
5eb91c98 DG |
1434 | /* |
1435 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1436 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1437 | */ |
1438 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1439 | ||
1440 | /* | |
1441 | * Wake the registration queue futex. Implicit memory | |
1442 | * barrier with the exchange in cds_wfq_enqueue. | |
1443 | */ | |
1444 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1445 | } | |
1446 | } | |
90014c57 | 1447 | } |
1d4b027a DG |
1448 | } |
1449 | ||
1450 | error: | |
0fdd1e2c DG |
1451 | DBG("UST Registration thread dying"); |
1452 | ||
1453 | /* Notify that the registration thread is gone */ | |
1454 | notify_ust_apps(0); | |
1455 | ||
1456 | close(apps_sock); | |
1457 | close(sock); | |
273ea72c | 1458 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1459 | |
5eb91c98 DG |
1460 | lttng_poll_clean(&events); |
1461 | ||
1d4b027a DG |
1462 | return NULL; |
1463 | } | |
1464 | ||
8c0faa1d | 1465 | /* |
3bd1e081 | 1466 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1467 | * exec or it will fails. |
8c0faa1d | 1468 | */ |
3bd1e081 | 1469 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1470 | { |
1471 | int ret; | |
ee0b0061 DG |
1472 | struct timespec timeout; |
1473 | ||
1474 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1475 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1476 | |
1477 | /* Setup semaphore */ | |
3bd1e081 | 1478 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1479 | if (ret < 0) { |
3bd1e081 | 1480 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1481 | goto error; |
1482 | } | |
8c0faa1d | 1483 | |
3bd1e081 MD |
1484 | ret = pthread_create(&consumer_data->thread, NULL, |
1485 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1486 | if (ret != 0) { |
3bd1e081 | 1487 | PERROR("pthread_create consumer"); |
ee0b0061 | 1488 | ret = -1; |
8c0faa1d DG |
1489 | goto error; |
1490 | } | |
1491 | ||
ee0b0061 DG |
1492 | /* Get time for sem_timedwait absolute timeout */ |
1493 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1494 | if (ret < 0) { | |
3bd1e081 | 1495 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1496 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1497 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1498 | } else { |
1499 | /* Normal timeout if the gettime was successful */ | |
1500 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1501 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1502 | } |
8c0faa1d | 1503 | |
ee0b0061 DG |
1504 | if (ret < 0) { |
1505 | if (errno == ETIMEDOUT) { | |
1506 | /* | |
1507 | * Call has timed out so we kill the kconsumerd_thread and return | |
1508 | * an error. | |
1509 | */ | |
3bd1e081 MD |
1510 | ERR("The consumer thread was never ready. Killing it"); |
1511 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1512 | if (ret < 0) { |
3bd1e081 | 1513 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1514 | } |
1515 | } else { | |
3bd1e081 | 1516 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1517 | } |
1518 | goto error; | |
1519 | } | |
1520 | ||
3bd1e081 MD |
1521 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1522 | if (consumer_data->pid == 0) { | |
712ea556 | 1523 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1524 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1525 | goto error; |
1526 | } | |
3bd1e081 | 1527 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1528 | |
8c0faa1d DG |
1529 | return 0; |
1530 | ||
1531 | error: | |
1532 | return ret; | |
1533 | } | |
1534 | ||
d9800920 | 1535 | /* |
3bd1e081 | 1536 | * Join consumer thread |
d9800920 | 1537 | */ |
3bd1e081 | 1538 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1539 | { |
1540 | void *status; | |
1541 | int ret; | |
1542 | ||
3bd1e081 MD |
1543 | if (consumer_data->pid != 0) { |
1544 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1545 | if (ret) { |
3bd1e081 | 1546 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1547 | return ret; |
1548 | } | |
3bd1e081 | 1549 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1550 | } else { |
1551 | return 0; | |
1552 | } | |
1553 | } | |
1554 | ||
8c0faa1d | 1555 | /* |
3bd1e081 | 1556 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1557 | * |
d063d709 | 1558 | * Return pid if successful else -1. |
8c0faa1d | 1559 | */ |
3bd1e081 | 1560 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1561 | { |
1562 | int ret; | |
1563 | pid_t pid; | |
53086306 | 1564 | const char *verbosity; |
8c0faa1d | 1565 | |
3bd1e081 | 1566 | DBG("Spawning consumerd"); |
c49dc785 | 1567 | |
8c0faa1d DG |
1568 | pid = fork(); |
1569 | if (pid == 0) { | |
1570 | /* | |
3bd1e081 | 1571 | * Exec consumerd. |
8c0faa1d | 1572 | */ |
3bd1e081 | 1573 | if (opt_verbose > 1 || opt_verbose_consumer) { |
53086306 DG |
1574 | verbosity = "--verbose"; |
1575 | } else { | |
1576 | verbosity = "--quiet"; | |
1577 | } | |
3bd1e081 MD |
1578 | switch (consumer_data->type) { |
1579 | case LTTNG_CONSUMER_KERNEL: | |
1580 | execl(INSTALL_BIN_PATH "/lttng-consumerd", | |
1581 | "lttng-consumerd", verbosity, "-k", NULL); | |
1582 | break; | |
1583 | case LTTNG_CONSUMER_UST: | |
1584 | execl(INSTALL_BIN_PATH "/lttng-consumerd", | |
1585 | "lttng-consumerd", verbosity, "-u", NULL); | |
1586 | break; | |
1587 | default: | |
1588 | perror("unknown consumer type"); | |
1589 | exit(EXIT_FAILURE); | |
1590 | } | |
8c0faa1d DG |
1591 | if (errno != 0) { |
1592 | perror("kernel start consumer exec"); | |
1593 | } | |
1594 | exit(EXIT_FAILURE); | |
1595 | } else if (pid > 0) { | |
1596 | ret = pid; | |
8c0faa1d | 1597 | } else { |
3bd1e081 | 1598 | perror("start consumer fork"); |
8c0faa1d | 1599 | ret = -errno; |
8c0faa1d | 1600 | } |
8c0faa1d DG |
1601 | return ret; |
1602 | } | |
1603 | ||
693bd40b | 1604 | /* |
3bd1e081 | 1605 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1606 | */ |
3bd1e081 | 1607 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1608 | { |
1609 | int ret; | |
1610 | ||
3bd1e081 MD |
1611 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1612 | if (consumer_data->pid != 0) { | |
1613 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1614 | goto end; |
1615 | } | |
693bd40b | 1616 | |
3bd1e081 | 1617 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1618 | if (ret < 0) { |
3bd1e081 MD |
1619 | ERR("Spawning consumerd failed"); |
1620 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1621 | goto error; |
693bd40b | 1622 | } |
c49dc785 | 1623 | |
3bd1e081 MD |
1624 | /* Setting up the consumer_data pid */ |
1625 | consumer_data->pid = ret; | |
1626 | DBG2("consumer pid %d", consumer_data->pid); | |
1627 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
693bd40b | 1628 | |
3bd1e081 MD |
1629 | DBG2("Spawning consumer control thread"); |
1630 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1631 | if (ret < 0) { |
3bd1e081 | 1632 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1633 | goto error; |
1634 | } | |
1635 | ||
c49dc785 | 1636 | end: |
693bd40b DG |
1637 | return 0; |
1638 | ||
1639 | error: | |
1640 | return ret; | |
1641 | } | |
1642 | ||
b73401da | 1643 | /* |
d063d709 | 1644 | * modprobe_kernel_modules |
b73401da DG |
1645 | */ |
1646 | static int modprobe_kernel_modules(void) | |
1647 | { | |
ab147185 | 1648 | int ret = 0, i; |
b73401da DG |
1649 | char modprobe[256]; |
1650 | ||
ab147185 MD |
1651 | for (i = 0; i < ARRAY_SIZE(kernel_modules_list); i++) { |
1652 | ret = snprintf(modprobe, sizeof(modprobe), | |
1653 | "/sbin/modprobe %s%s", | |
1654 | kernel_modules_list[i].required ? "" : "--quiet ", | |
1655 | kernel_modules_list[i].name); | |
b73401da DG |
1656 | if (ret < 0) { |
1657 | perror("snprintf modprobe"); | |
1658 | goto error; | |
1659 | } | |
ab147185 | 1660 | modprobe[sizeof(modprobe) - 1] = '\0'; |
b73401da | 1661 | ret = system(modprobe); |
ab147185 MD |
1662 | if (ret == -1) { |
1663 | ERR("Unable to launch modprobe for module %s", | |
1664 | kernel_modules_list[i].name); | |
1665 | } else if (kernel_modules_list[i].required | |
d9800920 | 1666 | && WEXITSTATUS(ret) != 0) { |
ab147185 MD |
1667 | ERR("Unable to load module %s", |
1668 | kernel_modules_list[i].name); | |
1669 | } else { | |
1670 | DBG("Modprobe successfully %s", | |
1671 | kernel_modules_list[i].name); | |
1672 | } | |
1673 | } | |
1674 | ||
1675 | error: | |
1676 | return ret; | |
1677 | } | |
1678 | ||
b73401da | 1679 | /* |
d063d709 | 1680 | * mount_debugfs |
b73401da DG |
1681 | */ |
1682 | static int mount_debugfs(char *path) | |
1683 | { | |
1684 | int ret; | |
1685 | char *type = "debugfs"; | |
1686 | ||
996b65c8 | 1687 | ret = mkdir_recursive(path, S_IRWXU | S_IRWXG, geteuid(), getegid()); |
b73401da | 1688 | if (ret < 0) { |
7272acf5 | 1689 | PERROR("Cannot create debugfs path"); |
b73401da DG |
1690 | goto error; |
1691 | } | |
1692 | ||
1693 | ret = mount(type, path, type, 0, NULL); | |
1694 | if (ret < 0) { | |
7272acf5 | 1695 | PERROR("Cannot mount debugfs"); |
b73401da DG |
1696 | goto error; |
1697 | } | |
1698 | ||
1699 | DBG("Mounted debugfs successfully at %s", path); | |
1700 | ||
1701 | error: | |
1702 | return ret; | |
1703 | } | |
1704 | ||
8c0faa1d | 1705 | /* |
d063d709 | 1706 | * Setup necessary data for kernel tracer action. |
8c0faa1d | 1707 | */ |
f3ed775e | 1708 | static void init_kernel_tracer(void) |
8c0faa1d | 1709 | { |
b73401da DG |
1710 | int ret; |
1711 | char *proc_mounts = "/proc/mounts"; | |
1712 | char line[256]; | |
684d34d2 | 1713 | char *debugfs_path = NULL, *lttng_path = NULL; |
b73401da DG |
1714 | FILE *fp; |
1715 | ||
1716 | /* Detect debugfs */ | |
1717 | fp = fopen(proc_mounts, "r"); | |
1718 | if (fp == NULL) { | |
1719 | ERR("Unable to probe %s", proc_mounts); | |
1720 | goto error; | |
1721 | } | |
1722 | ||
1723 | while (fgets(line, sizeof(line), fp) != NULL) { | |
1724 | if (strstr(line, "debugfs") != NULL) { | |
1725 | /* Remove first string */ | |
1726 | strtok(line, " "); | |
1727 | /* Dup string here so we can reuse line later on */ | |
1728 | debugfs_path = strdup(strtok(NULL, " ")); | |
1729 | DBG("Got debugfs path : %s", debugfs_path); | |
1730 | break; | |
1731 | } | |
1732 | } | |
1733 | ||
1734 | fclose(fp); | |
1735 | ||
1736 | /* Mount debugfs if needded */ | |
1737 | if (debugfs_path == NULL) { | |
1738 | ret = asprintf(&debugfs_path, "/mnt/debugfs"); | |
1739 | if (ret < 0) { | |
1740 | perror("asprintf debugfs path"); | |
1741 | goto error; | |
1742 | } | |
1743 | ret = mount_debugfs(debugfs_path); | |
1744 | if (ret < 0) { | |
7272acf5 | 1745 | perror("Cannot mount debugfs"); |
b73401da DG |
1746 | goto error; |
1747 | } | |
1748 | } | |
1749 | ||
1750 | /* Modprobe lttng kernel modules */ | |
1751 | ret = modprobe_kernel_modules(); | |
1752 | if (ret < 0) { | |
1753 | goto error; | |
1754 | } | |
1755 | ||
1756 | /* Setup lttng kernel path */ | |
1757 | ret = asprintf(<tng_path, "%s/lttng", debugfs_path); | |
1758 | if (ret < 0) { | |
1759 | perror("asprintf lttng path"); | |
1760 | goto error; | |
1761 | } | |
1762 | ||
1763 | /* Open debugfs lttng */ | |
1764 | kernel_tracer_fd = open(lttng_path, O_RDWR); | |
f3ed775e | 1765 | if (kernel_tracer_fd < 0) { |
b73401da DG |
1766 | DBG("Failed to open %s", lttng_path); |
1767 | goto error; | |
8c0faa1d DG |
1768 | } |
1769 | ||
b73401da DG |
1770 | free(lttng_path); |
1771 | free(debugfs_path); | |
f3ed775e | 1772 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
b73401da DG |
1773 | return; |
1774 | ||
1775 | error: | |
1776 | if (lttng_path) { | |
1777 | free(lttng_path); | |
1778 | } | |
1779 | if (debugfs_path) { | |
1780 | free(debugfs_path); | |
1781 | } | |
1782 | WARN("No kernel tracer available"); | |
1783 | kernel_tracer_fd = 0; | |
1784 | return; | |
f3ed775e | 1785 | } |
33a2b854 | 1786 | |
f3ed775e | 1787 | /* |
54d01ffb | 1788 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1789 | */ |
54d01ffb | 1790 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1791 | { |
f40799e8 | 1792 | int ret = 0; |
8c0faa1d | 1793 | |
3bd1e081 | 1794 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1795 | /* |
54d01ffb DG |
1796 | * Assign default kernel consumer socket if no consumer assigned to the |
1797 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1798 | * an extra security check. | |
d9800920 DG |
1799 | */ |
1800 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1801 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1802 | } |
1803 | ||
2bdd86d4 | 1804 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1805 | if (ret < 0) { |
f3ed775e DG |
1806 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1807 | goto error; | |
1808 | } | |
1d4b027a | 1809 | |
3bd1e081 | 1810 | session->consumer_fds_sent = 1; |
f3ed775e | 1811 | } |
1d4b027a DG |
1812 | |
1813 | error: | |
1814 | return ret; | |
8c0faa1d DG |
1815 | } |
1816 | ||
2bdd86d4 MD |
1817 | /* |
1818 | * Init tracing by creating trace directory and sending fds ust consumer. | |
1819 | */ | |
1820 | static int init_ust_tracing(struct ltt_ust_session *session) | |
1821 | { | |
1822 | int ret = 0; | |
1823 | ||
1824 | if (session->consumer_fds_sent == 0) { | |
1825 | /* | |
1826 | * Assign default ust consumer socket if no consumer assigned to the | |
1827 | * ust session. At this point, it's NOT suppose to be 0 but this is | |
1828 | * an extra security check. | |
1829 | */ | |
1830 | if (session->consumer_fd == 0) { | |
1831 | session->consumer_fd = ustconsumer_data.cmd_sock; | |
1832 | } | |
1833 | ||
1834 | ret = send_ustconsumer_session_streams(&ustconsumer_data, session); | |
1835 | if (ret < 0) { | |
1836 | ret = LTTCOMM_UST_CONSUMER_FAIL; | |
1837 | goto error; | |
1838 | } | |
1839 | ||
1840 | session->consumer_fds_sent = 1; | |
1841 | } | |
1842 | ||
1843 | error: | |
1844 | return ret; | |
1845 | } | |
1846 | ||
0177d773 DG |
1847 | /* |
1848 | * Create an UST session and add it to the session ust list. | |
1849 | */ | |
44d3bd01 DG |
1850 | static int create_ust_session(struct ltt_session *session, |
1851 | struct lttng_domain *domain) | |
0177d773 | 1852 | { |
44d3bd01 | 1853 | int ret; |
13384287 | 1854 | struct ltt_ust_session *lus = NULL; |
56fff090 | 1855 | struct ust_app *app; |
44d3bd01 DG |
1856 | |
1857 | switch (domain->type) { | |
1858 | case LTTNG_DOMAIN_UST_PID: | |
f6a9efaa | 1859 | app = ust_app_find_by_pid(domain->attr.pid); |
44d3bd01 DG |
1860 | if (app == NULL) { |
1861 | ret = LTTCOMM_APP_NOT_FOUND; | |
1862 | goto error; | |
1863 | } | |
1864 | break; | |
1865 | default: | |
13384287 | 1866 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1867 | goto error; |
1868 | } | |
0177d773 DG |
1869 | |
1870 | DBG("Creating UST session"); | |
1871 | ||
44d3bd01 | 1872 | lus = trace_ust_create_session(session->path, domain->attr.pid, domain); |
0177d773 | 1873 | if (lus == NULL) { |
44d3bd01 | 1874 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1875 | goto error; |
1876 | } | |
1877 | ||
1878 | ret = mkdir_recursive(lus->path, S_IRWXU | S_IRWXG, | |
1879 | geteuid(), allowed_group()); | |
1880 | if (ret < 0) { | |
1881 | if (ret != -EEXIST) { | |
1882 | ERR("Trace directory creation error"); | |
44d3bd01 | 1883 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1884 | goto error; |
1885 | } | |
1886 | } | |
1887 | ||
f6a9efaa DG |
1888 | /* The domain type dictate different actions on session creation */ |
1889 | switch (domain->type) { | |
1890 | case LTTNG_DOMAIN_UST_PID: | |
1891 | app = ust_app_find_by_pid(domain->attr.pid); | |
1892 | if (app == NULL) { | |
1893 | ret = LTTCOMM_APP_NOT_FOUND; | |
1894 | goto error; | |
1895 | } | |
1896 | /* Create session on the UST tracer */ | |
1897 | ret = ustctl_create_session(app->key.sock, lus); | |
1898 | if (ret < 0) { | |
1899 | ret = LTTCOMM_UST_SESS_FAIL; | |
1900 | goto error; | |
1901 | } | |
1902 | ||
1903 | lus->handle = ret; | |
1904 | break; | |
1905 | case LTTNG_DOMAIN_UST: | |
1906 | /* Create session on the UST tracer */ | |
1907 | ret = ustctl_create_session(app->key.sock, lus); | |
1908 | if (ret < 0) { | |
1909 | ret = LTTCOMM_UST_SESS_FAIL; | |
1910 | goto error; | |
1911 | } | |
1912 | break; | |
1913 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
1914 | break; | |
1915 | default: | |
1916 | goto error; | |
0177d773 | 1917 | } |
2bdd86d4 MD |
1918 | lus->handle = ret; |
1919 | lus->sock = app->sock; | |
0177d773 | 1920 | |
f6a9efaa DG |
1921 | session->ust_session = lus; |
1922 | printf("%p\n", session->ust_session); | |
44d3bd01 DG |
1923 | |
1924 | return LTTCOMM_OK; | |
0177d773 DG |
1925 | |
1926 | error: | |
1927 | free(lus); | |
1928 | return ret; | |
1929 | } | |
1930 | ||
333f285e | 1931 | /* |
d063d709 | 1932 | * Create a kernel tracer session then create the default channel. |
333f285e | 1933 | */ |
f3ed775e | 1934 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1935 | { |
f3ed775e | 1936 | int ret; |
f3ed775e DG |
1937 | |
1938 | DBG("Creating kernel session"); | |
1939 | ||
1940 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1941 | if (ret < 0) { | |
1942 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1943 | goto error; | |
333f285e DG |
1944 | } |
1945 | ||
d9800920 | 1946 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1947 | if (kconsumer_data.cmd_sock) { |
1948 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1949 | } |
1950 | ||
63053e7c DG |
1951 | ret = mkdir_recursive(session->kernel_session->trace_path, |
1952 | S_IRWXU | S_IRWXG, geteuid(), allowed_group()); | |
7a485870 | 1953 | if (ret < 0) { |
996b65c8 | 1954 | if (ret != -EEXIST) { |
7a485870 DG |
1955 | ERR("Trace directory creation error"); |
1956 | goto error; | |
1957 | } | |
1958 | } | |
1959 | ||
f3ed775e DG |
1960 | error: |
1961 | return ret; | |
333f285e DG |
1962 | } |
1963 | ||
6c9cc2ab DG |
1964 | /* |
1965 | * Using the session list, filled a lttng_session array to send back to the | |
1966 | * client for session listing. | |
1967 | * | |
1968 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1969 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab DG |
1970 | */ |
1971 | static void list_lttng_sessions(struct lttng_session *sessions) | |
1972 | { | |
1973 | int i = 0; | |
1974 | struct ltt_session *session; | |
1975 | ||
1976 | DBG("Getting all available session"); | |
1977 | /* | |
1978 | * Iterate over session list and append data after the control struct in | |
1979 | * the buffer. | |
1980 | */ | |
1981 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1982 | strncpy(sessions[i].path, session->path, PATH_MAX); | |
99497cd0 | 1983 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1984 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1985 | sessions[i].name[NAME_MAX - 1] = '\0'; |
6c9cc2ab DG |
1986 | i++; |
1987 | } | |
1988 | } | |
1989 | ||
9f19cc17 DG |
1990 | /* |
1991 | * Fill lttng_channel array of all channels. | |
1992 | */ | |
1993 | static void list_lttng_channels(struct ltt_session *session, | |
1994 | struct lttng_channel *channels) | |
1995 | { | |
1996 | int i = 0; | |
1997 | struct ltt_kernel_channel *kchan; | |
1998 | ||
1999 | DBG("Listing channels for session %s", session->name); | |
2000 | ||
2001 | /* Kernel channels */ | |
2002 | if (session->kernel_session != NULL) { | |
54d01ffb DG |
2003 | cds_list_for_each_entry(kchan, |
2004 | &session->kernel_session->channel_list.head, list) { | |
9f19cc17 DG |
2005 | /* Copy lttng_channel struct to array */ |
2006 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
2007 | channels[i].enabled = kchan->enabled; | |
2008 | i++; | |
2009 | } | |
2010 | } | |
2011 | ||
2012 | /* TODO: Missing UST listing */ | |
2013 | } | |
2014 | ||
2015 | /* | |
2016 | * Fill lttng_event array of all events in the channel. | |
2017 | */ | |
2018 | static void list_lttng_events(struct ltt_kernel_channel *kchan, | |
2019 | struct lttng_event *events) | |
2020 | { | |
2021 | /* | |
2022 | * TODO: This is ONLY kernel. Need UST support. | |
2023 | */ | |
2024 | int i = 0; | |
2025 | struct ltt_kernel_event *event; | |
2026 | ||
2027 | DBG("Listing events for channel %s", kchan->channel->name); | |
2028 | ||
2029 | /* Kernel channels */ | |
2030 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
2031 | strncpy(events[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); | |
99497cd0 | 2032 | events[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; |
9f19cc17 DG |
2033 | events[i].enabled = event->enabled; |
2034 | switch (event->event->instrumentation) { | |
2035 | case LTTNG_KERNEL_TRACEPOINT: | |
2036 | events[i].type = LTTNG_EVENT_TRACEPOINT; | |
2037 | break; | |
2038 | case LTTNG_KERNEL_KPROBE: | |
2039 | case LTTNG_KERNEL_KRETPROBE: | |
2040 | events[i].type = LTTNG_EVENT_PROBE; | |
2041 | memcpy(&events[i].attr.probe, &event->event->u.kprobe, | |
2042 | sizeof(struct lttng_kernel_kprobe)); | |
2043 | break; | |
2044 | case LTTNG_KERNEL_FUNCTION: | |
2045 | events[i].type = LTTNG_EVENT_FUNCTION; | |
2046 | memcpy(&events[i].attr.ftrace, &event->event->u.ftrace, | |
2047 | sizeof(struct lttng_kernel_function)); | |
2048 | break; | |
0133c199 MD |
2049 | case LTTNG_KERNEL_NOOP: |
2050 | events[i].type = LTTNG_EVENT_NOOP; | |
2051 | break; | |
a54bd42d MD |
2052 | case LTTNG_KERNEL_SYSCALL: |
2053 | events[i].type = LTTNG_EVENT_SYSCALL; | |
0133c199 | 2054 | break; |
7a3d1328 MD |
2055 | case LTTNG_KERNEL_ALL: |
2056 | assert(0); | |
2057 | break; | |
9f19cc17 DG |
2058 | } |
2059 | i++; | |
2060 | } | |
2061 | } | |
2062 | ||
fac6795d | 2063 | /* |
54d01ffb | 2064 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2065 | */ |
54d01ffb DG |
2066 | static int cmd_disable_channel(struct ltt_session *session, |
2067 | int domain, char *channel_name) | |
fac6795d | 2068 | { |
54d01ffb | 2069 | int ret; |
379473d2 | 2070 | |
54d01ffb DG |
2071 | switch (domain) { |
2072 | case LTTNG_DOMAIN_KERNEL: | |
2073 | ret = channel_kernel_disable(session->kernel_session, | |
2074 | channel_name); | |
2075 | if (ret != LTTCOMM_OK) { | |
333f285e DG |
2076 | goto error; |
2077 | } | |
54d01ffb DG |
2078 | |
2079 | kernel_wait_quiescent(kernel_tracer_fd); | |
d0254c7c | 2080 | break; |
44d3bd01 DG |
2081 | case LTTNG_DOMAIN_UST_PID: |
2082 | break; | |
d0254c7c | 2083 | default: |
44d3bd01 | 2084 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
54d01ffb | 2085 | goto error; |
20fe2104 DG |
2086 | } |
2087 | ||
54d01ffb | 2088 | ret = LTTCOMM_OK; |
d65106b1 | 2089 | |
54d01ffb DG |
2090 | error: |
2091 | return ret; | |
2092 | } | |
2093 | ||
56fff090 DG |
2094 | /* |
2095 | * Copy channel from attributes and set it in the application channel list. | |
2096 | */ | |
f6a9efaa | 2097 | /* |
56fff090 DG |
2098 | static int copy_ust_channel_to_app(struct ltt_ust_session *usess, |
2099 | struct lttng_channel *attr, struct ust_app *app) | |
2100 | { | |
2101 | int ret; | |
2102 | struct ltt_ust_channel *uchan, *new_chan; | |
2103 | ||
f6a9efaa | 2104 | uchan = trace_ust_get_channel_by_key(usess->channels, attr->name); |
56fff090 DG |
2105 | if (uchan == NULL) { |
2106 | ret = LTTCOMM_FATAL; | |
2107 | goto error; | |
2108 | } | |
2109 | ||
2110 | new_chan = trace_ust_create_channel(attr, usess->path); | |
2111 | if (new_chan == NULL) { | |
2112 | PERROR("malloc ltt_ust_channel"); | |
2113 | ret = LTTCOMM_FATAL; | |
2114 | goto error; | |
2115 | } | |
2116 | ||
2117 | ret = channel_ust_copy(new_chan, uchan); | |
2118 | if (ret < 0) { | |
2119 | ret = LTTCOMM_FATAL; | |
2120 | goto error; | |
2121 | } | |
2122 | ||
56fff090 DG |
2123 | error: |
2124 | return ret; | |
2125 | } | |
f6a9efaa | 2126 | */ |
56fff090 | 2127 | |
54d01ffb DG |
2128 | /* |
2129 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2130 | */ | |
44d3bd01 DG |
2131 | static int cmd_enable_channel(struct ltt_session *session, |
2132 | struct lttng_domain *domain, struct lttng_channel *attr) | |
54d01ffb DG |
2133 | { |
2134 | int ret; | |
f6a9efaa DG |
2135 | struct ltt_ust_session *usess = session->ust_session; |
2136 | ||
2137 | DBG("Enabling channel %s for session %s", session->name, attr->name); | |
d65106b1 | 2138 | |
44d3bd01 DG |
2139 | switch (domain->type) { |
2140 | case LTTNG_DOMAIN_KERNEL: | |
2141 | { | |
2142 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2143 | |
44d3bd01 DG |
2144 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2145 | session->kernel_session); | |
2146 | if (kchan == NULL) { | |
2147 | ret = channel_kernel_create(session->kernel_session, | |
2148 | attr, kernel_poll_pipe[1]); | |
2149 | } else { | |
2150 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2151 | } | |
2152 | ||
2153 | if (ret != LTTCOMM_OK) { | |
2154 | goto error; | |
2155 | } | |
2156 | ||
2157 | kernel_wait_quiescent(kernel_tracer_fd); | |
2158 | break; | |
2159 | } | |
f6a9efaa DG |
2160 | case LTTNG_DOMAIN_UST: |
2161 | { | |
2162 | struct ltt_ust_channel *uchan; | |
2163 | ||
2164 | DBG2("Enabling channel for LTTNG_DOMAIN_UST domain"); | |
2165 | ||
2166 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2167 | attr->name); | |
2168 | if (uchan == NULL) { | |
2169 | uchan = trace_ust_create_channel(attr, usess->path); | |
2170 | if (uchan == NULL) { | |
2171 | ret = LTTCOMM_UST_CHAN_FAIL; | |
2172 | goto error; | |
2173 | } | |
2174 | rcu_read_lock(); | |
2175 | hashtable_add_unique(usess->domain_global.channels, &uchan->node); | |
2176 | rcu_read_unlock(); | |
2177 | } else { | |
2178 | ret = LTTCOMM_UST_CHAN_EXIST; | |
2179 | goto error; | |
2180 | } | |
2181 | ||
2182 | /* TODO: Iterate over trace apps to enable that channel */ | |
2183 | ||
2184 | break; | |
2185 | } | |
44d3bd01 DG |
2186 | case LTTNG_DOMAIN_UST_PID: |
2187 | { | |
f6a9efaa | 2188 | /* |
56fff090 DG |
2189 | int sock; |
2190 | struct ltt_ust_channel *uchan; | |
44d3bd01 | 2191 | struct ltt_ust_session *usess; |
56fff090 | 2192 | struct ust_app *app; |
44d3bd01 DG |
2193 | |
2194 | usess = trace_ust_get_session_by_pid(&session->ust_session_list, | |
2195 | domain->attr.pid); | |
2196 | if (usess == NULL) { | |
2197 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2198 | goto error; | |
2199 | } | |
2200 | ||
56fff090 | 2201 | app = ust_app_get_by_pid(domain->attr.pid); |
44d3bd01 DG |
2202 | if (app == NULL) { |
2203 | ret = LTTCOMM_APP_NOT_FOUND; | |
2204 | goto error; | |
2205 | } | |
56fff090 | 2206 | sock = app->sock; |
44d3bd01 DG |
2207 | |
2208 | uchan = trace_ust_get_channel_by_name(attr->name, usess); | |
2209 | if (uchan == NULL) { | |
56fff090 | 2210 | ret = channel_ust_create(usess, attr, sock); |
44d3bd01 | 2211 | } else { |
56fff090 | 2212 | ret = channel_ust_enable(usess, uchan, sock); |
44d3bd01 DG |
2213 | } |
2214 | ||
2215 | if (ret != LTTCOMM_OK) { | |
2216 | goto error; | |
2217 | } | |
2218 | ||
56fff090 DG |
2219 | ret = copy_ust_channel_to_app(usess, attr, app); |
2220 | if (ret != LTTCOMM_OK) { | |
44d3bd01 DG |
2221 | goto error; |
2222 | } | |
2223 | ||
44d3bd01 DG |
2224 | DBG("UST channel %s created for app sock %d with pid %d", |
2225 | attr->name, app->sock, domain->attr.pid); | |
f6a9efaa DG |
2226 | */ |
2227 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2228 | goto error; | |
44d3bd01 DG |
2229 | } |
2230 | default: | |
2231 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2232 | goto error; | |
54d01ffb DG |
2233 | } |
2234 | ||
2235 | ret = LTTCOMM_OK; | |
2236 | ||
2237 | error: | |
2238 | return ret; | |
2239 | } | |
2240 | ||
2241 | /* | |
2242 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2243 | */ | |
2244 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2245 | char *channel_name, char *event_name) | |
2246 | { | |
2247 | int ret; | |
54d01ffb DG |
2248 | |
2249 | switch (domain) { | |
2250 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2251 | { |
2252 | struct ltt_kernel_channel *kchan; | |
2253 | ||
54d01ffb DG |
2254 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2255 | session->kernel_session); | |
2256 | if (kchan == NULL) { | |
2257 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2258 | goto error; | |
d65106b1 DG |
2259 | } |
2260 | ||
7a3d1328 | 2261 | ret = event_kernel_disable_tracepoint(session->kernel_session, kchan, event_name); |
54d01ffb DG |
2262 | if (ret != LTTCOMM_OK) { |
2263 | goto error; | |
2264 | } | |
2265 | ||
2266 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2267 | break; |
2bdd86d4 MD |
2268 | } |
2269 | case LTTNG_DOMAIN_UST: | |
2270 | { | |
2271 | struct ltt_ust_session *ustsession; | |
2272 | ||
2273 | cds_list_for_each_entry(ustsession, &session->ust_session_list.head, list) { | |
2274 | struct ltt_ust_channel *ustchan; | |
2275 | ||
2276 | ustchan = trace_ust_get_channel_by_name(channel_name, | |
2277 | ustsession); | |
2278 | if (ustchan == NULL) { | |
2279 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2280 | goto error; | |
2281 | } | |
2282 | ret = event_ust_disable_tracepoint(ustsession, ustchan, event_name); | |
2283 | if (ret != LTTCOMM_OK) { | |
2284 | goto error; | |
2285 | } | |
2286 | ||
2287 | ustctl_wait_quiescent(ustsession->sock); | |
2288 | } | |
2289 | break; | |
2290 | } | |
2291 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2292 | case LTTNG_DOMAIN_UST_PID: | |
2293 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
54d01ffb | 2294 | default: |
2bdd86d4 | 2295 | /* TODO: Other UST domains */ |
54d01ffb DG |
2296 | ret = LTTCOMM_NOT_IMPLEMENTED; |
2297 | goto error; | |
d65106b1 | 2298 | } |
26cc6b4e | 2299 | |
54d01ffb DG |
2300 | ret = LTTCOMM_OK; |
2301 | ||
2302 | error: | |
2303 | return ret; | |
2304 | } | |
2305 | ||
2306 | /* | |
2307 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2308 | */ | |
2309 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2310 | char *channel_name) | |
2311 | { | |
2312 | int ret; | |
2313 | struct ltt_kernel_channel *kchan; | |
2314 | ||
2315 | switch (domain) { | |
2316 | case LTTNG_DOMAIN_KERNEL: | |
2317 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2318 | session->kernel_session); | |
2319 | if (kchan == NULL) { | |
2320 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2321 | goto error; | |
26cc6b4e DG |
2322 | } |
2323 | ||
54d01ffb DG |
2324 | ret = event_kernel_disable_all(session->kernel_session, kchan); |
2325 | if (ret != LTTCOMM_OK) { | |
0b97ec54 | 2326 | goto error; |
26cc6b4e DG |
2327 | } |
2328 | ||
54d01ffb | 2329 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2330 | break; |
54d01ffb DG |
2331 | default: |
2332 | /* TODO: Userspace tracing */ | |
2333 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2334 | goto error; | |
26cc6b4e | 2335 | } |
e953ef25 | 2336 | |
54d01ffb | 2337 | ret = LTTCOMM_OK; |
e953ef25 | 2338 | |
54d01ffb DG |
2339 | error: |
2340 | return ret; | |
2341 | } | |
f5177a38 | 2342 | |
54d01ffb DG |
2343 | /* |
2344 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2345 | */ | |
2346 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2347 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2348 | { | |
2349 | int ret; | |
f5177a38 | 2350 | |
54d01ffb DG |
2351 | switch (domain) { |
2352 | case LTTNG_DOMAIN_KERNEL: | |
2353 | /* Add kernel context to kernel tracer */ | |
2354 | ret = context_kernel_add(session->kernel_session, ctx, | |
2355 | event_name, channel_name); | |
2356 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2357 | goto error; |
e953ef25 | 2358 | } |
2bdd86d4 MD |
2359 | break; |
2360 | case LTTNG_DOMAIN_UST: | |
2361 | { | |
2362 | struct ltt_ust_session *ustsession; | |
e953ef25 | 2363 | |
2bdd86d4 MD |
2364 | cds_list_for_each_entry(ustsession, &session->ust_session_list.head, list) { |
2365 | /* Add UST context to UST tracer */ | |
2366 | ret = context_ust_add(ustsession, ctx, | |
2367 | event_name, channel_name); | |
2368 | if (ret != LTTCOMM_OK) { | |
2369 | goto error; | |
2370 | } | |
2371 | } | |
e953ef25 | 2372 | break; |
2bdd86d4 | 2373 | } |
54d01ffb | 2374 | default: |
2bdd86d4 | 2375 | /* TODO: UST other domains */ |
54d01ffb DG |
2376 | ret = LTTCOMM_NOT_IMPLEMENTED; |
2377 | goto error; | |
e953ef25 | 2378 | } |
950131af | 2379 | |
54d01ffb | 2380 | ret = LTTCOMM_OK; |
950131af | 2381 | |
54d01ffb DG |
2382 | error: |
2383 | return ret; | |
2384 | } | |
2385 | ||
2386 | /* | |
2387 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2388 | */ | |
2389 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2390 | char *channel_name, struct lttng_event *event) | |
2391 | { | |
2392 | int ret; | |
f6cd6b0f | 2393 | struct lttng_channel *attr; |
54d01ffb DG |
2394 | |
2395 | switch (domain) { | |
2396 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2397 | { |
2398 | struct ltt_kernel_channel *kchan; | |
2399 | ||
54d01ffb DG |
2400 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2401 | session->kernel_session); | |
2402 | if (kchan == NULL) { | |
f6cd6b0f DG |
2403 | attr = channel_new_default_attr(domain); |
2404 | if (attr == NULL) { | |
2405 | ret = LTTCOMM_FATAL; | |
2406 | goto error; | |
2407 | } | |
2408 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2409 | ||
54d01ffb | 2410 | /* This call will notify the kernel thread */ |
44d3bd01 | 2411 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2412 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2413 | if (ret != LTTCOMM_OK) { |
f5177a38 DG |
2414 | goto error; |
2415 | } | |
54d01ffb | 2416 | } |
950131af | 2417 | |
54d01ffb DG |
2418 | /* Get the newly created kernel channel pointer */ |
2419 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2420 | session->kernel_session); | |
2421 | if (kchan == NULL) { | |
2422 | /* This sould not happen... */ | |
2423 | ret = LTTCOMM_FATAL; | |
2424 | goto error; | |
2425 | } | |
f5177a38 | 2426 | |
7a3d1328 | 2427 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, event); |
54d01ffb | 2428 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2429 | goto error; |
950131af DG |
2430 | } |
2431 | ||
54d01ffb | 2432 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2433 | break; |
2bdd86d4 MD |
2434 | } |
2435 | case LTTNG_DOMAIN_UST: | |
2436 | { | |
2437 | struct ltt_ust_session *ustsession; | |
2438 | ||
2439 | cds_list_for_each_entry(ustsession, &session->ust_session_list.head, list) { | |
2440 | struct ltt_ust_channel *ustchan; | |
2441 | ||
2442 | ustchan = trace_ust_get_channel_by_name(channel_name, | |
2443 | ustsession); | |
2444 | if (ustchan == NULL) { | |
2445 | attr = channel_new_default_attr(domain); | |
2446 | if (attr == NULL) { | |
2447 | ret = LTTCOMM_FATAL; | |
2448 | goto error; | |
2449 | } | |
2450 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2451 | ||
2452 | ret = channel_ust_create(ustsession, | |
2453 | attr, ustsession->sock); | |
2454 | if (ret != LTTCOMM_OK) { | |
2455 | goto error; | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | /* Get the newly created ust channel pointer */ | |
2460 | ustchan = trace_ust_get_channel_by_name(channel_name, | |
2461 | ustsession); | |
2462 | if (ustchan == NULL) { | |
2463 | /* This sould not happen... */ | |
2464 | ret = LTTCOMM_FATAL; | |
2465 | goto error; | |
2466 | } | |
2467 | ||
2468 | ret = event_ust_enable_tracepoint(ustsession, ustchan, event); | |
2469 | if (ret != LTTCOMM_OK) { | |
2470 | goto error; | |
2471 | } | |
2472 | ||
2473 | ustctl_wait_quiescent(ustsession->sock); | |
2474 | } | |
2475 | break; | |
2476 | } | |
2477 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2478 | case LTTNG_DOMAIN_UST_PID: | |
2479 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
54d01ffb | 2480 | default: |
2bdd86d4 | 2481 | /* TODO: UST other domains */ |
54d01ffb DG |
2482 | ret = LTTCOMM_NOT_IMPLEMENTED; |
2483 | goto error; | |
950131af | 2484 | } |
d36b8583 | 2485 | |
54d01ffb | 2486 | ret = LTTCOMM_OK; |
d36b8583 | 2487 | |
54d01ffb DG |
2488 | error: |
2489 | return ret; | |
2490 | } | |
7d29a247 | 2491 | |
54d01ffb DG |
2492 | /* |
2493 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2494 | */ | |
2495 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2496 | char *channel_name, int event_type) |
54d01ffb DG |
2497 | { |
2498 | int ret; | |
2499 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2500 | |
54d01ffb DG |
2501 | switch (domain) { |
2502 | case LTTNG_DOMAIN_KERNEL: | |
2503 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2504 | session->kernel_session); | |
2505 | if (kchan == NULL) { | |
2506 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2507 | ret = channel_kernel_create(session->kernel_session, NULL, |
2508 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2509 | if (ret != LTTCOMM_OK) { |
2510 | goto error; | |
d36b8583 | 2511 | } |
54d01ffb | 2512 | } |
0d0c377a | 2513 | |
54d01ffb DG |
2514 | /* Get the newly created kernel channel pointer */ |
2515 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2516 | session->kernel_session); | |
2517 | if (kchan == NULL) { | |
2518 | /* This sould not happen... */ | |
2519 | ret = LTTCOMM_FATAL; | |
2520 | goto error; | |
2521 | } | |
0fdd1e2c | 2522 | |
7a3d1328 MD |
2523 | switch (event_type) { |
2524 | case LTTNG_KERNEL_SYSCALL: | |
2525 | ret = event_kernel_enable_all_syscalls(session->kernel_session, | |
8c9ae521 | 2526 | kchan, kernel_tracer_fd); |
7a3d1328 MD |
2527 | break; |
2528 | case LTTNG_KERNEL_TRACEPOINT: | |
8c9ae521 | 2529 | /* |
7a3d1328 MD |
2530 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2531 | * events already registered to the channel. | |
8c9ae521 | 2532 | */ |
7a3d1328 MD |
2533 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2534 | kchan, kernel_tracer_fd); | |
2535 | break; | |
2536 | case LTTNG_KERNEL_ALL: | |
2537 | /* Enable syscalls and tracepoints */ | |
8c9ae521 DG |
2538 | ret = event_kernel_enable_all(session->kernel_session, |
2539 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2540 | break; |
2541 | default: | |
2542 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2543 | goto error; | |
8c9ae521 | 2544 | } |
54d01ffb | 2545 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2546 | goto error; |
d36b8583 DG |
2547 | } |
2548 | ||
54d01ffb | 2549 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2550 | break; |
54d01ffb DG |
2551 | default: |
2552 | /* TODO: Userspace tracing */ | |
2553 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2554 | goto error; | |
d36b8583 | 2555 | } |
f3ed775e | 2556 | |
54d01ffb DG |
2557 | ret = LTTCOMM_OK; |
2558 | ||
2559 | error: | |
2560 | return ret; | |
2561 | } | |
2562 | ||
2563 | /* | |
2564 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2565 | */ | |
2566 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2567 | { | |
2568 | int ret; | |
2569 | ssize_t nb_events = 0; | |
2570 | ||
2571 | switch (domain) { | |
2572 | case LTTNG_DOMAIN_KERNEL: | |
2573 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2574 | if (nb_events < 0) { | |
2575 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2576 | goto error; | |
894be886 | 2577 | } |
54d01ffb DG |
2578 | break; |
2579 | default: | |
2580 | /* TODO: Userspace listing */ | |
2581 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2582 | goto error; | |
2583 | } | |
894be886 | 2584 | |
54d01ffb | 2585 | return nb_events; |
7d29a247 | 2586 | |
54d01ffb DG |
2587 | error: |
2588 | /* Return negative value to differentiate return code */ | |
2589 | return -ret; | |
2590 | } | |
b389abbe | 2591 | |
54d01ffb DG |
2592 | /* |
2593 | * Command LTTNG_START_TRACE processed by the client thread. | |
2594 | */ | |
2595 | static int cmd_start_trace(struct ltt_session *session) | |
2596 | { | |
2597 | int ret; | |
54d01ffb | 2598 | struct ltt_kernel_session *ksession; |
2bdd86d4 | 2599 | struct ltt_ust_session *ustsession; |
b389abbe | 2600 | |
54d01ffb DG |
2601 | /* Short cut */ |
2602 | ksession = session->kernel_session; | |
5eb91c98 | 2603 | |
54d01ffb DG |
2604 | /* Kernel tracing */ |
2605 | if (ksession != NULL) { | |
2bdd86d4 MD |
2606 | struct ltt_kernel_channel *kchan; |
2607 | ||
54d01ffb DG |
2608 | /* Open kernel metadata */ |
2609 | if (ksession->metadata == NULL) { | |
2610 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2611 | if (ret < 0) { | |
2612 | ret = LTTCOMM_KERN_META_FAIL; | |
2613 | goto error; | |
b389abbe | 2614 | } |
54d01ffb | 2615 | } |
7d29a247 | 2616 | |
54d01ffb DG |
2617 | /* Open kernel metadata stream */ |
2618 | if (ksession->metadata_stream_fd == 0) { | |
2619 | ret = kernel_open_metadata_stream(ksession); | |
2620 | if (ret < 0) { | |
2621 | ERR("Kernel create metadata stream failed"); | |
2622 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2623 | goto error; | |
2624 | } | |
2625 | } | |
2626 | ||
2627 | /* For each channel */ | |
2628 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2629 | if (kchan->stream_count == 0) { | |
2630 | ret = kernel_open_channel_stream(kchan); | |
2631 | if (ret < 0) { | |
2632 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2633 | goto error; |
2634 | } | |
54d01ffb DG |
2635 | /* Update the stream global counter */ |
2636 | ksession->stream_count_global += ret; | |
7d29a247 | 2637 | } |
54d01ffb DG |
2638 | } |
2639 | ||
2640 | /* Setup kernel consumer socket and send fds to it */ | |
2641 | ret = init_kernel_tracing(ksession); | |
2642 | if (ret < 0) { | |
2643 | ret = LTTCOMM_KERN_START_FAIL; | |
2644 | goto error; | |
2645 | } | |
2646 | ||
2647 | /* This start the kernel tracing */ | |
2648 | ret = kernel_start_session(ksession); | |
2649 | if (ret < 0) { | |
2650 | ret = LTTCOMM_KERN_START_FAIL; | |
2651 | goto error; | |
2652 | } | |
2653 | ||
2654 | /* Quiescent wait after starting trace */ | |
2655 | kernel_wait_quiescent(kernel_tracer_fd); | |
2656 | } | |
2657 | ||
2bdd86d4 MD |
2658 | /* Start all UST traces */ |
2659 | cds_list_for_each_entry(ustsession, &session->ust_session_list.head, list) { | |
2660 | struct ltt_ust_channel *ustchan; | |
2661 | ||
2662 | /* Open kernel metadata */ | |
2663 | if (ustsession->metadata == NULL) { | |
2664 | struct lttng_ust_channel_attr ustattr; | |
2665 | ||
2666 | /* Allocate UST metadata */ | |
2667 | ustsession->metadata = trace_ust_create_metadata(ustsession->path); | |
2668 | if (ustsession->metadata == NULL) { | |
2669 | ret = LTTCOMM_UST_META_FAIL; | |
2670 | goto error; | |
2671 | } | |
2672 | ||
2673 | ustattr.overwrite = ustsession->metadata->attr.overwrite; | |
2674 | ustattr.subbuf_size = ustsession->metadata->attr.subbuf_size; | |
2675 | ustattr.num_subbuf = ustsession->metadata->attr.num_subbuf; | |
2676 | ustattr.switch_timer_interval = ustsession->metadata->attr.switch_timer_interval; | |
2677 | ustattr.read_timer_interval = ustsession->metadata->attr.read_timer_interval; | |
2678 | ustattr.output = ustsession->metadata->attr.output; | |
2679 | ||
2680 | /* UST tracer metadata creation */ | |
2681 | ret = ustctl_open_metadata(ustsession->sock, | |
2682 | ustsession->handle, &ustattr, | |
2683 | &ustsession->metadata->obj); | |
2684 | if (ret < 0) { | |
2685 | ret = LTTCOMM_UST_META_FAIL; | |
2686 | goto error; | |
2687 | } | |
2688 | } | |
2689 | ||
2690 | /* Open UST metadata stream */ | |
2691 | if (ustsession->metadata->stream_obj == NULL) { | |
2692 | ret = ustctl_create_stream(ustsession->sock, | |
2693 | ustsession->metadata->obj, | |
2694 | &ustsession->metadata->stream_obj); | |
2695 | if (ret < 0) { | |
2696 | ERR("UST create metadata stream failed"); | |
2697 | ret = LTTCOMM_UST_STREAM_FAIL; | |
2698 | goto error; | |
2699 | } | |
2700 | ret = asprintf(&ustsession->metadata->pathname, "%s/%s", | |
2701 | ustsession->path, "metadata"); | |
2702 | if (ret < 0) { | |
2703 | perror("asprintf UST create stream"); | |
2704 | goto error; | |
2705 | } | |
2706 | } | |
2707 | ||
2708 | /* For each channel */ | |
2709 | cds_list_for_each_entry(ustchan, &ustsession->channels.head, list) { | |
2710 | if (ustchan->stream_count == 0) { | |
2711 | struct ltt_ust_stream *ustream; | |
2712 | ||
2713 | ustream = zmalloc(sizeof(*ustream)); | |
2714 | if (!ustream) { | |
2715 | ret = LTTCOMM_UST_STREAM_FAIL; | |
2716 | goto error; | |
2717 | } | |
2718 | ret = ustctl_create_stream(ustsession->sock, | |
2719 | ustchan->obj, &ustream->obj); | |
2720 | if (ret < 0) { | |
2721 | ret = LTTCOMM_UST_STREAM_FAIL; | |
2722 | goto error; | |
2723 | } | |
2724 | ret = asprintf(&ustream->pathname, "%s/%s_%d", | |
2725 | ustchan->trace_path, ustchan->name, | |
2726 | ustchan->stream_count); | |
2727 | if (ret < 0) { | |
2728 | perror("asprintf UST create stream"); | |
2729 | goto error; | |
2730 | } | |
2731 | cds_list_add(&ustream->list, &ustchan->stream_list.head); | |
2732 | ustchan->stream_count++; | |
2733 | } | |
2734 | } | |
2735 | ||
2736 | /* Setup UST consumer socket and send fds to it */ | |
2737 | ret = init_ust_tracing(ustsession); | |
2738 | if (ret < 0) { | |
2739 | ret = LTTCOMM_UST_START_FAIL; | |
2740 | goto error; | |
2741 | } | |
2742 | ||
2743 | /* This start the UST tracing */ | |
2744 | ret = ustctl_start_session(ustsession->sock, ustsession->handle); | |
2745 | if (ret < 0) { | |
2746 | ret = LTTCOMM_UST_START_FAIL; | |
2747 | goto error; | |
2748 | } | |
2749 | ||
2750 | /* Quiescent wait after starting trace */ | |
2751 | ustctl_wait_quiescent(ustsession->sock); | |
2752 | } | |
54d01ffb DG |
2753 | |
2754 | ret = LTTCOMM_OK; | |
2755 | ||
2756 | error: | |
2757 | return ret; | |
2758 | } | |
2759 | ||
2760 | /* | |
2761 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2762 | */ | |
2763 | static int cmd_stop_trace(struct ltt_session *session) | |
2764 | { | |
2765 | int ret; | |
2766 | struct ltt_kernel_channel *kchan; | |
2767 | struct ltt_kernel_session *ksession; | |
2bdd86d4 MD |
2768 | struct ltt_ust_session *ustsession; |
2769 | struct ltt_ust_channel *ustchan; | |
54d01ffb DG |
2770 | |
2771 | /* Short cut */ | |
2772 | ksession = session->kernel_session; | |
2773 | ||
2774 | /* Kernel tracer */ | |
2775 | if (ksession != NULL) { | |
2776 | DBG("Stop kernel tracing"); | |
2777 | ||
2778 | /* Flush all buffers before stopping */ | |
2779 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2780 | if (ret < 0) { | |
2781 | ERR("Kernel metadata flush failed"); | |
2782 | } | |
f34daff7 | 2783 | |
54d01ffb DG |
2784 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2785 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2786 | if (ret < 0) { |
54d01ffb | 2787 | ERR("Kernel flush buffer error"); |
7d29a247 | 2788 | } |
54d01ffb | 2789 | } |
19e70852 | 2790 | |
54d01ffb DG |
2791 | ret = kernel_stop_session(ksession); |
2792 | if (ret < 0) { | |
2793 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2794 | goto error; |
f3ed775e | 2795 | } |
54d01ffb DG |
2796 | |
2797 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2798 | } |
54d01ffb | 2799 | |
2bdd86d4 MD |
2800 | /* Stop each UST session */ |
2801 | DBG("Stop UST tracing"); | |
2802 | cds_list_for_each_entry(ustsession, &session->ust_session_list.head, list) { | |
2803 | /* Flush all buffers before stopping */ | |
2804 | ret = ustctl_flush_buffer(ustsession->sock, ustsession->metadata->obj); | |
2805 | if (ret < 0) { | |
2806 | ERR("UST metadata flush failed"); | |
2807 | } | |
2808 | ||
2809 | cds_list_for_each_entry(ustchan, &ustsession->channels.head, list) { | |
2810 | ret = ustctl_flush_buffer(ustsession->sock, ustchan->obj); | |
2811 | if (ret < 0) { | |
2812 | ERR("UST flush buffer error"); | |
2813 | } | |
2814 | } | |
2815 | ||
2816 | ret = ustctl_stop_session(ustsession->sock, ustsession->handle); | |
2817 | if (ret < 0) { | |
2818 | ret = LTTCOMM_KERN_STOP_FAIL; | |
2819 | goto error; | |
2820 | } | |
2821 | ||
2822 | ustctl_wait_quiescent(ustsession->sock); | |
2823 | } | |
54d01ffb DG |
2824 | |
2825 | ret = LTTCOMM_OK; | |
2826 | ||
2827 | error: | |
2828 | return ret; | |
2829 | } | |
2830 | ||
2831 | /* | |
2832 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2833 | */ | |
2834 | static int cmd_create_session(char *name, char *path) | |
2835 | { | |
2836 | int ret; | |
2837 | ||
2838 | ret = session_create(name, path); | |
2839 | if (ret != LTTCOMM_OK) { | |
2840 | goto error; | |
2841 | } | |
2842 | ||
2843 | ret = LTTCOMM_OK; | |
2844 | ||
2845 | error: | |
2846 | return ret; | |
2847 | } | |
2848 | ||
2849 | /* | |
2850 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2851 | */ | |
2852 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2853 | { | |
2854 | int ret; | |
2855 | ||
2856 | /* Clean kernel session teardown */ | |
2857 | teardown_kernel_session(session); | |
2858 | ||
2859 | /* | |
2860 | * Must notify the kernel thread here to update it's poll setin order | |
2861 | * to remove the channel(s)' fd just destroyed. | |
2862 | */ | |
2863 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2864 | if (ret < 0) { | |
2865 | perror("write kernel poll pipe"); | |
2866 | } | |
2867 | ||
271933a4 | 2868 | ret = session_destroy(session); |
54d01ffb DG |
2869 | |
2870 | return ret; | |
2871 | } | |
2872 | ||
2873 | /* | |
2874 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2875 | */ | |
2876 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2877 | { | |
2878 | int ret; | |
2879 | ||
2880 | switch (domain) { | |
2881 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2882 | { |
54d01ffb | 2883 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2884 | |
54d01ffb DG |
2885 | kcalibrate.type = calibrate->type; |
2886 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2887 | if (ret < 0) { |
54d01ffb DG |
2888 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2889 | goto error; | |
33a2b854 | 2890 | } |
54d01ffb DG |
2891 | break; |
2892 | } | |
2893 | default: | |
2894 | /* TODO: Userspace tracing */ | |
2895 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2896 | goto error; | |
2897 | } | |
33a2b854 | 2898 | |
54d01ffb | 2899 | ret = LTTCOMM_OK; |
33a2b854 | 2900 | |
54d01ffb DG |
2901 | error: |
2902 | return ret; | |
2903 | } | |
7d29a247 | 2904 | |
54d01ffb DG |
2905 | /* |
2906 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2907 | */ | |
2908 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
2909 | char *sock_path) | |
2910 | { | |
2911 | int ret, sock; | |
b389abbe | 2912 | |
54d01ffb DG |
2913 | switch (domain) { |
2914 | case LTTNG_DOMAIN_KERNEL: | |
2915 | /* Can't register a consumer if there is already one */ | |
2916 | if (session->kernel_session->consumer_fd != 0) { | |
2917 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
2918 | goto error; | |
2919 | } | |
2920 | ||
2921 | sock = lttcomm_connect_unix_sock(sock_path); | |
2922 | if (sock < 0) { | |
2923 | ret = LTTCOMM_CONNECT_FAIL; | |
2924 | goto error; | |
2925 | } | |
2926 | ||
2927 | session->kernel_session->consumer_fd = sock; | |
2928 | break; | |
2929 | default: | |
2930 | /* TODO: Userspace tracing */ | |
2931 | ret = LTTCOMM_NOT_IMPLEMENTED; | |
2932 | goto error; | |
2933 | } | |
2934 | ||
2935 | ret = LTTCOMM_OK; | |
2936 | ||
2937 | error: | |
2938 | return ret; | |
2939 | } | |
2940 | ||
2941 | /* | |
2942 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
2943 | */ | |
2944 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
2945 | struct lttng_domain **domains) | |
2946 | { | |
2947 | int ret; | |
2948 | ssize_t nb_dom = 0; | |
2949 | ||
2950 | if (session->kernel_session != NULL) { | |
2951 | nb_dom++; | |
2952 | } | |
2953 | ||
f6a9efaa | 2954 | /* TODO: User-space tracer domain support */ |
54d01ffb DG |
2955 | |
2956 | *domains = malloc(nb_dom * sizeof(struct lttng_domain)); | |
2957 | if (*domains == NULL) { | |
2958 | ret = -LTTCOMM_FATAL; | |
2959 | goto error; | |
2960 | } | |
2961 | ||
2962 | (*domains)[0].type = LTTNG_DOMAIN_KERNEL; | |
2963 | ||
54d01ffb DG |
2964 | return nb_dom; |
2965 | ||
2966 | error: | |
2967 | return ret; | |
2968 | } | |
2969 | ||
2970 | /* | |
2971 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
2972 | */ | |
2973 | static ssize_t cmd_list_channels(struct ltt_session *session, | |
2974 | struct lttng_channel **channels) | |
2975 | { | |
2976 | int ret; | |
2977 | ssize_t nb_chan = 0; | |
2978 | ||
2979 | if (session->kernel_session != NULL) { | |
2980 | nb_chan += session->kernel_session->channel_count; | |
2981 | } | |
2982 | ||
2983 | *channels = malloc(nb_chan * sizeof(struct lttng_channel)); | |
2984 | if (*channels == NULL) { | |
2985 | ret = -LTTCOMM_FATAL; | |
2986 | goto error; | |
2987 | } | |
2988 | ||
2989 | list_lttng_channels(session, *channels); | |
2990 | ||
2bdd86d4 MD |
2991 | /* TODO UST support */ |
2992 | ||
54d01ffb DG |
2993 | return nb_chan; |
2994 | ||
2995 | error: | |
2996 | return ret; | |
2997 | } | |
2998 | ||
2999 | /* | |
3000 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3001 | */ | |
3002 | static ssize_t cmd_list_events(struct ltt_session *session, | |
3003 | char *channel_name, struct lttng_event **events) | |
3004 | { | |
3005 | int ret; | |
3006 | ssize_t nb_event = 0; | |
3007 | struct ltt_kernel_channel *kchan = NULL; | |
3008 | ||
3009 | if (session->kernel_session != NULL) { | |
3010 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
3011 | session->kernel_session); | |
3012 | if (kchan == NULL) { | |
3013 | ret = -LTTCOMM_KERN_CHAN_NOT_FOUND; | |
3014 | goto error; | |
3015 | } | |
3016 | nb_event += kchan->event_count; | |
3017 | } | |
3018 | ||
3019 | *events = malloc(nb_event * sizeof(struct lttng_event)); | |
3020 | if (*events == NULL) { | |
3021 | ret = -LTTCOMM_FATAL; | |
3022 | goto error; | |
3023 | } | |
3024 | ||
3025 | list_lttng_events(kchan, *events); | |
3026 | ||
3027 | /* TODO: User-space tracer support */ | |
3028 | ||
3029 | return nb_event; | |
3030 | ||
3031 | error: | |
3032 | return ret; | |
3033 | } | |
3034 | ||
3035 | /* | |
3036 | * Process the command requested by the lttng client within the command | |
3037 | * context structure. This function make sure that the return structure (llm) | |
3038 | * is set and ready for transmission before returning. | |
3039 | * | |
3040 | * Return any error encountered or 0 for success. | |
3041 | */ | |
3042 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3043 | { | |
3044 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3045 | int need_tracing_session = 1; |
54d01ffb DG |
3046 | |
3047 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3048 | ||
3049 | /* | |
3050 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3051 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3052 | * command. |
3053 | */ | |
3054 | switch(cmd_ctx->lsm->cmd_type) { | |
3055 | case LTTNG_LIST_SESSIONS: | |
3056 | case LTTNG_LIST_TRACEPOINTS: | |
3057 | case LTTNG_LIST_DOMAINS: | |
3058 | case LTTNG_LIST_CHANNELS: | |
3059 | case LTTNG_LIST_EVENTS: | |
3060 | break; | |
3061 | default: | |
3062 | /* Setup lttng message with no payload */ | |
3063 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3064 | if (ret < 0) { | |
3065 | /* This label does not try to unlock the session */ | |
3066 | goto init_setup_error; | |
3067 | } | |
3068 | } | |
3069 | ||
3070 | /* Commands that DO NOT need a session. */ | |
3071 | switch (cmd_ctx->lsm->cmd_type) { | |
3072 | case LTTNG_CALIBRATE: | |
3073 | case LTTNG_CREATE_SESSION: | |
3074 | case LTTNG_LIST_SESSIONS: | |
3075 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3076 | need_tracing_session = 0; |
54d01ffb DG |
3077 | break; |
3078 | default: | |
3079 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3080 | session_lock_list(); |
54d01ffb | 3081 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3082 | session_unlock_list(); |
54d01ffb DG |
3083 | if (cmd_ctx->session == NULL) { |
3084 | if (cmd_ctx->lsm->session.name != NULL) { | |
3085 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3086 | } else { | |
3087 | /* If no session name specified */ | |
3088 | ret = LTTCOMM_SELECT_SESS; | |
3089 | } | |
3090 | goto error; | |
3091 | } else { | |
3092 | /* Acquire lock for the session */ | |
3093 | session_lock(cmd_ctx->session); | |
3094 | } | |
3095 | break; | |
3096 | } | |
b389abbe | 3097 | |
54d01ffb DG |
3098 | /* |
3099 | * Check domain type for specific "pre-action". | |
3100 | */ | |
3101 | switch (cmd_ctx->lsm->domain.type) { | |
3102 | case LTTNG_DOMAIN_KERNEL: | |
3103 | /* Kernel tracer check */ | |
3104 | if (kernel_tracer_fd == 0) { | |
3105 | /* Basically, load kernel tracer modules */ | |
3106 | init_kernel_tracer(); | |
3107 | if (kernel_tracer_fd == 0) { | |
3108 | ret = LTTCOMM_KERN_NA; | |
3109 | goto error; | |
3110 | } | |
3111 | } | |
5eb91c98 | 3112 | |
54d01ffb | 3113 | /* Need a session for kernel command */ |
44d3bd01 | 3114 | if (need_tracing_session) { |
54d01ffb DG |
3115 | if (cmd_ctx->session->kernel_session == NULL) { |
3116 | ret = create_kernel_session(cmd_ctx->session); | |
5eb91c98 | 3117 | if (ret < 0) { |
54d01ffb | 3118 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3119 | goto error; |
3120 | } | |
b389abbe | 3121 | } |
7d29a247 | 3122 | |
54d01ffb | 3123 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3124 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3125 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3126 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3127 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3128 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3129 | if (ret < 0) { |
54d01ffb DG |
3130 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3131 | goto error; | |
950131af | 3132 | } |
33a2b854 | 3133 | } |
3bd1e081 | 3134 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
0d0c377a | 3135 | } |
54d01ffb | 3136 | break; |
2bdd86d4 MD |
3137 | case LTTNG_DOMAIN_UST: |
3138 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 3139 | case LTTNG_DOMAIN_UST_PID: |
2bdd86d4 | 3140 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
44d3bd01 DG |
3141 | { |
3142 | struct ltt_ust_session *usess; | |
44d3bd01 | 3143 | if (need_tracing_session) { |
f6a9efaa | 3144 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 DG |
3145 | ret = create_ust_session(cmd_ctx->session, |
3146 | &cmd_ctx->lsm->domain); | |
3147 | if (ret != LTTCOMM_OK) { | |
3148 | goto error; | |
3149 | } | |
3150 | } | |
2bdd86d4 MD |
3151 | /* Start the kernel consumer daemon */ |
3152 | pthread_mutex_lock(&ustconsumer_data.pid_mutex); | |
3153 | if (ustconsumer_data.pid == 0 && | |
3154 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3155 | pthread_mutex_unlock(&ustconsumer_data.pid_mutex); | |
3156 | ret = start_consumerd(&ustconsumer_data); | |
3157 | if (ret < 0) { | |
3158 | ret = LTTCOMM_KERN_CONSUMER_FAIL; | |
3159 | goto error; | |
3160 | } | |
3161 | } | |
3162 | pthread_mutex_unlock(&ustconsumer_data.pid_mutex); | |
44d3bd01 DG |
3163 | } |
3164 | break; | |
54d01ffb | 3165 | default: |
54d01ffb DG |
3166 | break; |
3167 | } | |
33a2b854 | 3168 | |
54d01ffb DG |
3169 | /* Process by command type */ |
3170 | switch (cmd_ctx->lsm->cmd_type) { | |
3171 | case LTTNG_ADD_CONTEXT: | |
3172 | { | |
3173 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3174 | cmd_ctx->lsm->u.context.channel_name, | |
3175 | cmd_ctx->lsm->u.context.event_name, | |
3176 | &cmd_ctx->lsm->u.context.ctx); | |
3177 | break; | |
3178 | } | |
3179 | case LTTNG_DISABLE_CHANNEL: | |
3180 | { | |
3181 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3182 | cmd_ctx->lsm->u.disable.channel_name); | |
3183 | break; | |
3184 | } | |
3185 | case LTTNG_DISABLE_EVENT: | |
3186 | { | |
3187 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3188 | cmd_ctx->lsm->u.disable.channel_name, | |
3189 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3190 | ret = LTTCOMM_OK; |
3191 | break; | |
3192 | } | |
54d01ffb DG |
3193 | case LTTNG_DISABLE_ALL_EVENT: |
3194 | { | |
2bdd86d4 | 3195 | DBG("Disabling all events"); |
54d01ffb DG |
3196 | |
3197 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3198 | cmd_ctx->lsm->u.disable.channel_name); | |
3199 | break; | |
3200 | } | |
3201 | case LTTNG_ENABLE_CHANNEL: | |
3202 | { | |
44d3bd01 | 3203 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
54d01ffb DG |
3204 | &cmd_ctx->lsm->u.channel.chan); |
3205 | break; | |
3206 | } | |
3207 | case LTTNG_ENABLE_EVENT: | |
3208 | { | |
3209 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3210 | cmd_ctx->lsm->u.enable.channel_name, | |
3211 | &cmd_ctx->lsm->u.enable.event); | |
3212 | break; | |
3213 | } | |
3214 | case LTTNG_ENABLE_ALL_EVENT: | |
3215 | { | |
2bdd86d4 | 3216 | DBG("Enabling all events"); |
54d01ffb DG |
3217 | |
3218 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3219 | cmd_ctx->lsm->u.enable.channel_name, |
3220 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3221 | break; |
3222 | } | |
052da939 | 3223 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3224 | { |
9f19cc17 | 3225 | struct lttng_event *events; |
54d01ffb | 3226 | ssize_t nb_events; |
052da939 | 3227 | |
54d01ffb DG |
3228 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3229 | if (nb_events < 0) { | |
3230 | ret = -nb_events; | |
3231 | goto error; | |
2ef84c95 DG |
3232 | } |
3233 | ||
3234 | /* | |
3235 | * Setup lttng message with payload size set to the event list size in | |
3236 | * bytes and then copy list into the llm payload. | |
3237 | */ | |
052da939 | 3238 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3239 | if (ret < 0) { |
052da939 | 3240 | free(events); |
2ef84c95 DG |
3241 | goto setup_error; |
3242 | } | |
3243 | ||
3244 | /* Copy event list into message payload */ | |
9f19cc17 | 3245 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3246 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3247 | |
9f19cc17 | 3248 | free(events); |
2ef84c95 DG |
3249 | |
3250 | ret = LTTCOMM_OK; | |
3251 | break; | |
3252 | } | |
f3ed775e | 3253 | case LTTNG_START_TRACE: |
8c0faa1d | 3254 | { |
54d01ffb | 3255 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3256 | break; |
3257 | } | |
f3ed775e | 3258 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3259 | { |
54d01ffb | 3260 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3261 | break; |
3262 | } | |
5e16da05 MD |
3263 | case LTTNG_CREATE_SESSION: |
3264 | { | |
54d01ffb DG |
3265 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
3266 | cmd_ctx->lsm->session.path); | |
5e16da05 MD |
3267 | break; |
3268 | } | |
3269 | case LTTNG_DESTROY_SESSION: | |
3270 | { | |
54d01ffb DG |
3271 | ret = cmd_destroy_session(cmd_ctx->session, |
3272 | cmd_ctx->lsm->session.name); | |
5461b305 | 3273 | break; |
5e16da05 | 3274 | } |
9f19cc17 | 3275 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3276 | { |
54d01ffb DG |
3277 | ssize_t nb_dom; |
3278 | struct lttng_domain *domains; | |
5461b305 | 3279 | |
54d01ffb DG |
3280 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3281 | if (nb_dom < 0) { | |
3282 | ret = -nb_dom; | |
3283 | goto error; | |
ce3d728c | 3284 | } |
520ff687 | 3285 | |
54d01ffb | 3286 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3287 | if (ret < 0) { |
3288 | goto setup_error; | |
520ff687 | 3289 | } |
57167058 | 3290 | |
54d01ffb DG |
3291 | /* Copy event list into message payload */ |
3292 | memcpy(cmd_ctx->llm->payload, domains, | |
3293 | nb_dom * sizeof(struct lttng_domain)); | |
3294 | ||
3295 | free(domains); | |
5e16da05 | 3296 | |
5461b305 | 3297 | ret = LTTCOMM_OK; |
5e16da05 MD |
3298 | break; |
3299 | } | |
9f19cc17 | 3300 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3301 | { |
54d01ffb DG |
3302 | size_t nb_chan; |
3303 | struct lttng_channel *channels; | |
3304 | ||
3305 | nb_chan = cmd_list_channels(cmd_ctx->session, &channels); | |
3306 | if (nb_chan < 0) { | |
3307 | ret = -nb_chan; | |
3308 | goto error; | |
5461b305 | 3309 | } |
ca95a216 | 3310 | |
54d01ffb | 3311 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3312 | if (ret < 0) { |
3313 | goto setup_error; | |
3314 | } | |
9f19cc17 | 3315 | |
54d01ffb DG |
3316 | /* Copy event list into message payload */ |
3317 | memcpy(cmd_ctx->llm->payload, channels, | |
3318 | nb_chan * sizeof(struct lttng_channel)); | |
3319 | ||
3320 | free(channels); | |
9f19cc17 DG |
3321 | |
3322 | ret = LTTCOMM_OK; | |
5461b305 | 3323 | break; |
5e16da05 | 3324 | } |
9f19cc17 | 3325 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3326 | { |
54d01ffb | 3327 | size_t nb_event; |
684d34d2 | 3328 | struct lttng_event *events = NULL; |
9f19cc17 | 3329 | |
54d01ffb DG |
3330 | nb_event = cmd_list_events(cmd_ctx->session, |
3331 | cmd_ctx->lsm->u.list.channel_name, &events); | |
3332 | if (nb_event < 0) { | |
3333 | ret = -nb_event; | |
3334 | goto error; | |
5461b305 | 3335 | } |
ca95a216 | 3336 | |
54d01ffb | 3337 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3338 | if (ret < 0) { |
3339 | goto setup_error; | |
3340 | } | |
9f19cc17 | 3341 | |
54d01ffb DG |
3342 | /* Copy event list into message payload */ |
3343 | memcpy(cmd_ctx->llm->payload, events, | |
3344 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3345 | |
54d01ffb | 3346 | free(events); |
9f19cc17 DG |
3347 | |
3348 | ret = LTTCOMM_OK; | |
5461b305 | 3349 | break; |
5e16da05 MD |
3350 | } |
3351 | case LTTNG_LIST_SESSIONS: | |
3352 | { | |
54d01ffb | 3353 | session_lock_list(); |
5461b305 | 3354 | |
6c9cc2ab | 3355 | if (session_list_ptr->count == 0) { |
f3ed775e | 3356 | ret = LTTCOMM_NO_SESSION; |
54d01ffb | 3357 | session_unlock_list(); |
5461b305 | 3358 | goto error; |
57167058 | 3359 | } |
5e16da05 | 3360 | |
6c9cc2ab DG |
3361 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * |
3362 | session_list_ptr->count); | |
5461b305 | 3363 | if (ret < 0) { |
54d01ffb | 3364 | session_unlock_list(); |
5461b305 | 3365 | goto setup_error; |
e065084a | 3366 | } |
5e16da05 | 3367 | |
6c9cc2ab DG |
3368 | /* Filled the session array */ |
3369 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload)); | |
3370 | ||
54d01ffb | 3371 | session_unlock_list(); |
5e16da05 | 3372 | |
5461b305 | 3373 | ret = LTTCOMM_OK; |
5e16da05 MD |
3374 | break; |
3375 | } | |
d0254c7c MD |
3376 | case LTTNG_CALIBRATE: |
3377 | { | |
54d01ffb DG |
3378 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3379 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3380 | break; |
3381 | } | |
d9800920 DG |
3382 | case LTTNG_REGISTER_CONSUMER: |
3383 | { | |
54d01ffb DG |
3384 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3385 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3386 | break; |
3387 | } | |
5e16da05 | 3388 | default: |
5e16da05 | 3389 | ret = LTTCOMM_UND; |
5461b305 | 3390 | break; |
fac6795d DG |
3391 | } |
3392 | ||
5461b305 | 3393 | error: |
5461b305 DG |
3394 | if (cmd_ctx->llm == NULL) { |
3395 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3396 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3397 | goto setup_error; |
3398 | } | |
3399 | } | |
54d01ffb | 3400 | /* Set return code */ |
5461b305 | 3401 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3402 | setup_error: |
b5541356 | 3403 | if (cmd_ctx->session) { |
54d01ffb | 3404 | session_unlock(cmd_ctx->session); |
b5541356 | 3405 | } |
54d01ffb | 3406 | init_setup_error: |
8028d920 | 3407 | return ret; |
fac6795d DG |
3408 | } |
3409 | ||
1d4b027a | 3410 | /* |
d063d709 DG |
3411 | * This thread manage all clients request using the unix client socket for |
3412 | * communication. | |
1d4b027a DG |
3413 | */ |
3414 | static void *thread_manage_clients(void *data) | |
3415 | { | |
5eb91c98 DG |
3416 | int sock = 0, ret, i, pollfd; |
3417 | uint32_t revents, nb_fd; | |
273ea72c | 3418 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3419 | struct lttng_poll_event events; |
1d4b027a DG |
3420 | |
3421 | DBG("[thread] Manage client started"); | |
3422 | ||
f6a9efaa DG |
3423 | rcu_register_thread(); |
3424 | ||
1d4b027a DG |
3425 | ret = lttcomm_listen_unix_sock(client_sock); |
3426 | if (ret < 0) { | |
3427 | goto error; | |
3428 | } | |
3429 | ||
5eb91c98 DG |
3430 | /* |
3431 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3432 | * more will be added to this poll set. | |
3433 | */ | |
3434 | ret = create_thread_poll_set(&events, 2); | |
3435 | if (ret < 0) { | |
3436 | goto error; | |
3437 | } | |
273ea72c | 3438 | |
5eb91c98 DG |
3439 | /* Add the application registration socket */ |
3440 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3441 | if (ret < 0) { | |
3442 | goto error; | |
3443 | } | |
273ea72c | 3444 | |
bbd973c2 DG |
3445 | /* |
3446 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3447 | */ |
3448 | if (opt_sig_parent) { | |
3449 | kill(ppid, SIGCHLD); | |
3450 | } | |
3451 | ||
3452 | while (1) { | |
1d4b027a | 3453 | DBG("Accepting client command ..."); |
273ea72c | 3454 | |
5eb91c98 DG |
3455 | nb_fd = LTTNG_POLL_GETNB(&events); |
3456 | ||
273ea72c | 3457 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 3458 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3459 | if (ret < 0) { |
273ea72c DG |
3460 | goto error; |
3461 | } | |
3462 | ||
5eb91c98 DG |
3463 | for (i = 0; i < nb_fd; i++) { |
3464 | /* Fetch once the poll data */ | |
3465 | revents = LTTNG_POLL_GETEV(&events, i); | |
3466 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3467 | ||
3468 | /* Thread quit pipe has been closed. Killing thread. */ | |
3469 | ret = check_thread_quit_pipe(pollfd, revents); | |
3470 | if (ret) { | |
3471 | goto error; | |
3472 | } | |
3473 | ||
3474 | /* Event on the registration socket */ | |
3475 | if (pollfd == client_sock) { | |
3476 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3477 | ERR("Client socket poll error"); | |
3478 | goto error; | |
3479 | } | |
3480 | } | |
3481 | } | |
3482 | ||
3483 | DBG("Wait for client response"); | |
3484 | ||
3485 | sock = lttcomm_accept_unix_sock(client_sock); | |
3486 | if (sock < 0) { | |
273ea72c | 3487 | goto error; |
273ea72c DG |
3488 | } |
3489 | ||
5eb91c98 DG |
3490 | /* Allocate context command to process the client request */ |
3491 | cmd_ctx = malloc(sizeof(struct command_ctx)); | |
3492 | if (cmd_ctx == NULL) { | |
3493 | perror("malloc cmd_ctx"); | |
1d4b027a | 3494 | goto error; |
5eb91c98 | 3495 | } |
1d4b027a | 3496 | |
5eb91c98 DG |
3497 | /* Allocate data buffer for reception */ |
3498 | cmd_ctx->lsm = malloc(sizeof(struct lttcomm_session_msg)); | |
3499 | if (cmd_ctx->lsm == NULL) { | |
3500 | perror("malloc cmd_ctx->lsm"); | |
3501 | goto error; | |
3502 | } | |
1d4b027a | 3503 | |
5eb91c98 DG |
3504 | cmd_ctx->llm = NULL; |
3505 | cmd_ctx->session = NULL; | |
1d4b027a | 3506 | |
5eb91c98 DG |
3507 | /* |
3508 | * Data is received from the lttng client. The struct | |
3509 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3510 | * the client. | |
3511 | */ | |
3512 | DBG("Receiving data from client ..."); | |
3513 | ret = lttcomm_recv_unix_sock(sock, cmd_ctx->lsm, | |
3514 | sizeof(struct lttcomm_session_msg)); | |
3515 | if (ret <= 0) { | |
3516 | DBG("Nothing recv() from client... continuing"); | |
3517 | close(sock); | |
3518 | free(cmd_ctx); | |
3519 | continue; | |
3520 | } | |
1d4b027a | 3521 | |
5eb91c98 DG |
3522 | // TODO: Validate cmd_ctx including sanity check for |
3523 | // security purpose. | |
f7776ea7 | 3524 | |
f6a9efaa | 3525 | rcu_thread_online(); |
5eb91c98 DG |
3526 | /* |
3527 | * This function dispatch the work to the kernel or userspace tracer | |
3528 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3529 | * informations for the client. The command context struct contains | |
3530 | * everything this function may needs. | |
3531 | */ | |
3532 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3533 | rcu_thread_offline(); |
5eb91c98 | 3534 | if (ret < 0) { |
bbd973c2 | 3535 | /* |
5eb91c98 DG |
3536 | * TODO: Inform client somehow of the fatal error. At |
3537 | * this point, ret < 0 means that a malloc failed | |
3538 | * (ENOMEM). Error detected but still accept command. | |
bbd973c2 | 3539 | */ |
bbd973c2 | 3540 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3541 | continue; |
3542 | } | |
d6e4fca4 | 3543 | |
54d01ffb DG |
3544 | DBG("Sending response (size: %d, retcode: %s)", |
3545 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3546 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3547 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3548 | if (ret < 0) { |
3549 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3550 | } |
1d4b027a | 3551 | |
5eb91c98 DG |
3552 | clean_command_ctx(&cmd_ctx); |
3553 | ||
3554 | /* End of transmission */ | |
273ea72c DG |
3555 | close(sock); |
3556 | } | |
3557 | ||
5eb91c98 DG |
3558 | error: |
3559 | DBG("Client thread dying"); | |
273ea72c | 3560 | unlink(client_unix_sock_path); |
5eb91c98 DG |
3561 | close(client_sock); |
3562 | close(sock); | |
273ea72c | 3563 | |
5eb91c98 | 3564 | lttng_poll_clean(&events); |
a2fb29a5 | 3565 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3566 | |
3567 | rcu_unregister_thread(); | |
1d4b027a DG |
3568 | return NULL; |
3569 | } | |
3570 | ||
3571 | ||
fac6795d DG |
3572 | /* |
3573 | * usage function on stderr | |
3574 | */ | |
3575 | static void usage(void) | |
3576 | { | |
b716ce68 | 3577 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3578 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3579 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3580 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3581 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3582 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
3bd1e081 MD |
3583 | fprintf(stderr, " --ustconsumerd-err-sock PATH Specify path for the UST consumer error socket\n"); |
3584 | fprintf(stderr, " --ustconsumerd-cmd-sock PATH Specify path for the UST consumer command socket\n"); | |
d6f42150 DG |
3585 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3586 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3587 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3588 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3589 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3590 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3591 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
fac6795d DG |
3592 | } |
3593 | ||
3594 | /* | |
3595 | * daemon argument parsing | |
3596 | */ | |
3597 | static int parse_args(int argc, char **argv) | |
3598 | { | |
3599 | int c; | |
3600 | ||
3601 | static struct option long_options[] = { | |
3602 | { "client-sock", 1, 0, 'c' }, | |
3603 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3604 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3605 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
3606 | { "ustconsumerd-cmd-sock", 1, 0, 'D' }, | |
3607 | { "ustconsumerd-err-sock", 1, 0, 'F' }, | |
fac6795d | 3608 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3609 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3610 | { "help", 0, 0, 'h' }, |
3611 | { "group", 1, 0, 'g' }, | |
3612 | { "version", 0, 0, 'V' }, | |
75462a81 | 3613 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3614 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3615 | { "verbose-consumer", 0, 0, 'Z' }, |
fac6795d DG |
3616 | { NULL, 0, 0, 0 } |
3617 | }; | |
3618 | ||
3619 | while (1) { | |
3620 | int option_index = 0; | |
3bd1e081 | 3621 | c = getopt_long(argc, argv, "dhqvVS" "a:c:g:s:C:E:D:F:Z", |
54d01ffb | 3622 | long_options, &option_index); |
fac6795d DG |
3623 | if (c == -1) { |
3624 | break; | |
3625 | } | |
3626 | ||
3627 | switch (c) { | |
3628 | case 0: | |
3629 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3630 | if (optarg) { | |
3631 | fprintf(stderr, " with arg %s\n", optarg); | |
3632 | } | |
3633 | break; | |
b716ce68 | 3634 | case 'c': |
fac6795d DG |
3635 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3636 | break; | |
3637 | case 'a': | |
3638 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3639 | break; | |
3640 | case 'd': | |
3641 | opt_daemon = 1; | |
3642 | break; | |
3643 | case 'g': | |
3644 | opt_tracing_group = strdup(optarg); | |
3645 | break; | |
3646 | case 'h': | |
3647 | usage(); | |
3648 | exit(EXIT_FAILURE); | |
3649 | case 'V': | |
3650 | fprintf(stdout, "%s\n", VERSION); | |
3651 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3652 | case 'S': |
3653 | opt_sig_parent = 1; | |
3654 | break; | |
d6f42150 | 3655 | case 'E': |
3bd1e081 | 3656 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3657 | break; |
3658 | case 'C': | |
3bd1e081 MD |
3659 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3660 | break; | |
3661 | case 'F': | |
3662 | snprintf(ustconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3663 | break; | |
3664 | case 'D': | |
3665 | snprintf(ustconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3666 | break; |
75462a81 DG |
3667 | case 'q': |
3668 | opt_quiet = 1; | |
3669 | break; | |
3f9947db | 3670 | case 'v': |
53086306 DG |
3671 | /* Verbose level can increase using multiple -v */ |
3672 | opt_verbose += 1; | |
3f9947db | 3673 | break; |
31f73cc9 | 3674 | case 'Z': |
3bd1e081 | 3675 | opt_verbose_consumer += 1; |
31f73cc9 | 3676 | break; |
fac6795d DG |
3677 | default: |
3678 | /* Unknown option or other error. | |
3679 | * Error is printed by getopt, just return */ | |
3680 | return -1; | |
3681 | } | |
3682 | } | |
3683 | ||
3684 | return 0; | |
3685 | } | |
3686 | ||
3687 | /* | |
d063d709 | 3688 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3689 | * apps_sock - The communication socket for all UST apps. |
3690 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3691 | */ |
cf3af59e | 3692 | static int init_daemon_socket(void) |
fac6795d DG |
3693 | { |
3694 | int ret = 0; | |
3695 | mode_t old_umask; | |
3696 | ||
3697 | old_umask = umask(0); | |
3698 | ||
3699 | /* Create client tool unix socket */ | |
d6f42150 DG |
3700 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3701 | if (client_sock < 0) { | |
3702 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3703 | ret = -1; |
3704 | goto end; | |
3705 | } | |
3706 | ||
3707 | /* File permission MUST be 660 */ | |
3708 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3709 | if (ret < 0) { | |
d6f42150 | 3710 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
3711 | perror("chmod"); |
3712 | goto end; | |
3713 | } | |
3714 | ||
3715 | /* Create the application unix socket */ | |
d6f42150 DG |
3716 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3717 | if (apps_sock < 0) { | |
3718 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3719 | ret = -1; |
3720 | goto end; | |
3721 | } | |
3722 | ||
d6f42150 | 3723 | /* File permission MUST be 666 */ |
54d01ffb DG |
3724 | ret = chmod(apps_unix_sock_path, |
3725 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3726 | if (ret < 0) { |
d6f42150 | 3727 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
3728 | perror("chmod"); |
3729 | goto end; | |
3730 | } | |
3731 | ||
3732 | end: | |
3733 | umask(old_umask); | |
3734 | return ret; | |
3735 | } | |
3736 | ||
3737 | /* | |
54d01ffb DG |
3738 | * Check if the global socket is available, and if a daemon is answering at the |
3739 | * other side. If yes, error is returned. | |
fac6795d | 3740 | */ |
cf3af59e | 3741 | static int check_existing_daemon(void) |
fac6795d | 3742 | { |
7d8234d9 | 3743 | if (access(client_unix_sock_path, F_OK) < 0 && |
099e26bd | 3744 | access(apps_unix_sock_path, F_OK) < 0) { |
7d8234d9 | 3745 | return 0; |
099e26bd | 3746 | } |
54d01ffb | 3747 | |
7d8234d9 | 3748 | /* Is there anybody out there ? */ |
099e26bd | 3749 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3750 | return -EEXIST; |
099e26bd | 3751 | } else { |
7d8234d9 | 3752 | return 0; |
099e26bd | 3753 | } |
fac6795d DG |
3754 | } |
3755 | ||
fac6795d | 3756 | /* |
d063d709 | 3757 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3758 | * |
d063d709 DG |
3759 | * Race window between mkdir and chown is OK because we are going from more |
3760 | * permissive (root.root) to les permissive (root.tracing). | |
fac6795d | 3761 | */ |
d6f42150 | 3762 | static int set_permissions(void) |
fac6795d DG |
3763 | { |
3764 | int ret; | |
996b65c8 | 3765 | gid_t gid; |
fac6795d | 3766 | |
996b65c8 MD |
3767 | gid = allowed_group(); |
3768 | if (gid < 0) { | |
a463f419 DG |
3769 | if (is_root) { |
3770 | WARN("No tracing group detected"); | |
3771 | ret = 0; | |
3772 | } else { | |
3773 | ERR("Missing tracing group. Aborting execution."); | |
3774 | ret = -1; | |
3775 | } | |
fac6795d DG |
3776 | goto end; |
3777 | } | |
3778 | ||
d6f42150 | 3779 | /* Set lttng run dir */ |
996b65c8 | 3780 | ret = chown(LTTNG_RUNDIR, 0, gid); |
d6f42150 DG |
3781 | if (ret < 0) { |
3782 | ERR("Unable to set group on " LTTNG_RUNDIR); | |
3783 | perror("chown"); | |
3784 | } | |
3785 | ||
3786 | /* lttng client socket path */ | |
996b65c8 | 3787 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3788 | if (ret < 0) { |
d6f42150 DG |
3789 | ERR("Unable to set group on %s", client_unix_sock_path); |
3790 | perror("chown"); | |
3791 | } | |
3792 | ||
3bd1e081 MD |
3793 | /* kconsumer error socket path */ |
3794 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3795 | if (ret < 0) { |
3bd1e081 MD |
3796 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
3797 | perror("chown"); | |
3798 | } | |
3799 | ||
3800 | /* ustconsumer error socket path */ | |
3801 | ret = chown(ustconsumer_data.err_unix_sock_path, 0, gid); | |
3802 | if (ret < 0) { | |
3803 | ERR("Unable to set group on %s", ustconsumer_data.err_unix_sock_path); | |
fac6795d DG |
3804 | perror("chown"); |
3805 | } | |
3806 | ||
d6f42150 | 3807 | DBG("All permissions are set"); |
e07ae692 | 3808 | |
fac6795d DG |
3809 | end: |
3810 | return ret; | |
3811 | } | |
3812 | ||
7a485870 | 3813 | /* |
d063d709 | 3814 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
3815 | */ |
3816 | static int create_kernel_poll_pipe(void) | |
3817 | { | |
3818 | return pipe2(kernel_poll_pipe, O_CLOEXEC); | |
3819 | } | |
3820 | ||
099e26bd DG |
3821 | /* |
3822 | * Create the application command pipe to wake thread_manage_apps. | |
3823 | */ | |
3824 | static int create_apps_cmd_pipe(void) | |
3825 | { | |
3826 | return pipe2(apps_cmd_pipe, O_CLOEXEC); | |
3827 | } | |
3828 | ||
d6f42150 | 3829 | /* |
d063d709 | 3830 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 DG |
3831 | */ |
3832 | static int create_lttng_rundir(void) | |
3833 | { | |
3834 | int ret; | |
3835 | ||
3836 | ret = mkdir(LTTNG_RUNDIR, S_IRWXU | S_IRWXG ); | |
3837 | if (ret < 0) { | |
b1f11e69 DG |
3838 | if (errno != EEXIST) { |
3839 | ERR("Unable to create " LTTNG_RUNDIR); | |
3840 | goto error; | |
3841 | } else { | |
3842 | ret = 0; | |
3843 | } | |
d6f42150 DG |
3844 | } |
3845 | ||
3846 | error: | |
3847 | return ret; | |
3848 | } | |
3849 | ||
3850 | /* | |
d063d709 DG |
3851 | * Setup sockets and directory needed by the kconsumerd communication with the |
3852 | * session daemon. | |
d6f42150 | 3853 | */ |
3bd1e081 | 3854 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
3855 | { |
3856 | int ret; | |
3bd1e081 MD |
3857 | const char *path = consumer_data->type == LTTNG_CONSUMER_KERNEL ? |
3858 | KCONSUMERD_PATH : USTCONSUMERD_PATH; | |
d6f42150 | 3859 | |
3bd1e081 MD |
3860 | if (strlen(consumer_data->err_unix_sock_path) == 0) { |
3861 | snprintf(consumer_data->err_unix_sock_path, PATH_MAX, | |
3862 | consumer_data->type == LTTNG_CONSUMER_KERNEL ? | |
3863 | KCONSUMERD_ERR_SOCK_PATH : | |
3864 | USTCONSUMERD_ERR_SOCK_PATH); | |
d6f42150 DG |
3865 | } |
3866 | ||
3bd1e081 MD |
3867 | if (strlen(consumer_data->cmd_unix_sock_path) == 0) { |
3868 | snprintf(consumer_data->cmd_unix_sock_path, PATH_MAX, | |
3869 | consumer_data->type == LTTNG_CONSUMER_KERNEL ? | |
3870 | KCONSUMERD_CMD_SOCK_PATH : | |
3871 | USTCONSUMERD_CMD_SOCK_PATH); | |
d6f42150 DG |
3872 | } |
3873 | ||
3bd1e081 | 3874 | ret = mkdir(path, S_IRWXU | S_IRWXG); |
d6f42150 | 3875 | if (ret < 0) { |
6beb2242 | 3876 | if (errno != EEXIST) { |
3bd1e081 | 3877 | ERR("Failed to create %s", path); |
6beb2242 DG |
3878 | goto error; |
3879 | } | |
3880 | ret = 0; | |
d6f42150 DG |
3881 | } |
3882 | ||
3883 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3884 | consumer_data->err_sock = |
3885 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3886 | if (consumer_data->err_sock < 0) { | |
3887 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3888 | ret = -1; |
3889 | goto error; | |
3890 | } | |
3891 | ||
3892 | /* File permission MUST be 660 */ | |
3bd1e081 | 3893 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3894 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3895 | if (ret < 0) { |
3bd1e081 | 3896 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
d6f42150 DG |
3897 | perror("chmod"); |
3898 | goto error; | |
3899 | } | |
3900 | ||
3901 | error: | |
3902 | return ret; | |
3903 | } | |
3904 | ||
fac6795d | 3905 | /* |
d063d709 | 3906 | * Signal handler for the daemon |
cf3af59e | 3907 | * |
54d01ffb DG |
3908 | * Simply stop all worker threads, leaving main() return gracefully after |
3909 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3910 | */ |
3911 | static void sighandler(int sig) | |
3912 | { | |
3913 | switch (sig) { | |
cf3af59e MD |
3914 | case SIGPIPE: |
3915 | DBG("SIGPIPE catched"); | |
3916 | return; | |
3917 | case SIGINT: | |
3918 | DBG("SIGINT catched"); | |
3919 | stop_threads(); | |
3920 | break; | |
3921 | case SIGTERM: | |
3922 | DBG("SIGTERM catched"); | |
3923 | stop_threads(); | |
3924 | break; | |
3925 | default: | |
3926 | break; | |
fac6795d | 3927 | } |
fac6795d DG |
3928 | } |
3929 | ||
3930 | /* | |
d063d709 | 3931 | * Setup signal handler for : |
1d4b027a | 3932 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3933 | */ |
1d4b027a | 3934 | static int set_signal_handler(void) |
fac6795d | 3935 | { |
1d4b027a DG |
3936 | int ret = 0; |
3937 | struct sigaction sa; | |
3938 | sigset_t sigset; | |
fac6795d | 3939 | |
1d4b027a DG |
3940 | if ((ret = sigemptyset(&sigset)) < 0) { |
3941 | perror("sigemptyset"); | |
3942 | return ret; | |
3943 | } | |
d6f42150 | 3944 | |
1d4b027a DG |
3945 | sa.sa_handler = sighandler; |
3946 | sa.sa_mask = sigset; | |
3947 | sa.sa_flags = 0; | |
3948 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
3949 | perror("sigaction"); | |
3950 | return ret; | |
d6f42150 DG |
3951 | } |
3952 | ||
1d4b027a DG |
3953 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
3954 | perror("sigaction"); | |
3955 | return ret; | |
d6f42150 | 3956 | } |
aaf26714 | 3957 | |
1d4b027a DG |
3958 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
3959 | perror("sigaction"); | |
3960 | return ret; | |
8c0faa1d DG |
3961 | } |
3962 | ||
1d4b027a DG |
3963 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3964 | ||
3965 | return ret; | |
fac6795d DG |
3966 | } |
3967 | ||
f3ed775e | 3968 | /* |
d063d709 DG |
3969 | * Set open files limit to unlimited. This daemon can open a large number of |
3970 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3971 | */ |
3972 | static void set_ulimit(void) | |
3973 | { | |
3974 | int ret; | |
3975 | struct rlimit lim; | |
3976 | ||
a88df331 | 3977 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3978 | lim.rlim_cur = 65535; |
3979 | lim.rlim_max = 65535; | |
3980 | ||
3981 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3982 | if (ret < 0) { | |
3983 | perror("failed to set open files limit"); | |
3984 | } | |
3985 | } | |
3986 | ||
fac6795d DG |
3987 | /* |
3988 | * main | |
3989 | */ | |
3990 | int main(int argc, char **argv) | |
3991 | { | |
fac6795d DG |
3992 | int ret = 0; |
3993 | void *status; | |
b082db07 | 3994 | const char *home_path; |
fac6795d | 3995 | |
f6a9efaa DG |
3996 | rcu_register_thread(); |
3997 | ||
273ea72c | 3998 | /* Create thread quit pipe */ |
cf3af59e MD |
3999 | if ((ret = init_thread_quit_pipe()) < 0) { |
4000 | goto error; | |
273ea72c DG |
4001 | } |
4002 | ||
fac6795d DG |
4003 | /* Parse arguments */ |
4004 | progname = argv[0]; | |
4005 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4006 | goto error; |
fac6795d DG |
4007 | } |
4008 | ||
4009 | /* Daemonize */ | |
4010 | if (opt_daemon) { | |
53094c05 DG |
4011 | ret = daemon(0, 0); |
4012 | if (ret < 0) { | |
4013 | perror("daemon"); | |
cf3af59e | 4014 | goto error; |
53094c05 | 4015 | } |
fac6795d DG |
4016 | } |
4017 | ||
4018 | /* Check if daemon is UID = 0 */ | |
4019 | is_root = !getuid(); | |
4020 | ||
fac6795d | 4021 | if (is_root) { |
d6f42150 DG |
4022 | ret = create_lttng_rundir(); |
4023 | if (ret < 0) { | |
cf3af59e | 4024 | goto error; |
d6f42150 DG |
4025 | } |
4026 | ||
fac6795d | 4027 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4028 | snprintf(apps_unix_sock_path, PATH_MAX, |
4029 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4030 | } |
4031 | ||
4032 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4033 | snprintf(client_unix_sock_path, PATH_MAX, |
4034 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4035 | } | |
0fdd1e2c DG |
4036 | |
4037 | /* Set global SHM for ust */ | |
4038 | if (strlen(wait_shm_path) == 0) { | |
4039 | snprintf(wait_shm_path, PATH_MAX, | |
4040 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4041 | } | |
fac6795d | 4042 | } else { |
b082db07 DG |
4043 | home_path = get_home_dir(); |
4044 | if (home_path == NULL) { | |
273ea72c DG |
4045 | /* TODO: Add --socket PATH option */ |
4046 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4047 | ret = -EPERM; |
4048 | goto error; | |
b082db07 DG |
4049 | } |
4050 | ||
fac6795d | 4051 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4052 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4053 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4054 | } |
4055 | ||
4056 | /* Set the cli tool unix socket path */ | |
4057 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4058 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4059 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4060 | } |
0fdd1e2c DG |
4061 | |
4062 | /* Set global SHM for ust */ | |
4063 | if (strlen(wait_shm_path) == 0) { | |
4064 | snprintf(wait_shm_path, PATH_MAX, | |
4065 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4066 | } | |
fac6795d DG |
4067 | } |
4068 | ||
847177cd DG |
4069 | DBG("Client socket path %s", client_unix_sock_path); |
4070 | DBG("Application socket path %s", apps_unix_sock_path); | |
4071 | ||
273ea72c | 4072 | /* |
7d8234d9 | 4073 | * See if daemon already exist. |
fac6795d | 4074 | */ |
7d8234d9 | 4075 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4076 | ERR("Already running daemon.\n"); |
273ea72c | 4077 | /* |
cf3af59e MD |
4078 | * We do not goto exit because we must not cleanup() |
4079 | * because a daemon is already running. | |
ab118b20 | 4080 | */ |
cf3af59e | 4081 | goto error; |
a88df331 DG |
4082 | } |
4083 | ||
54d01ffb | 4084 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4085 | |
4086 | /* | |
4087 | * These actions must be executed as root. We do that *after* setting up | |
4088 | * the sockets path because we MUST make the check for another daemon using | |
4089 | * those paths *before* trying to set the kernel consumer sockets and init | |
4090 | * kernel tracer. | |
4091 | */ | |
4092 | if (is_root) { | |
3bd1e081 MD |
4093 | ret = set_consumer_sockets(&kconsumer_data); |
4094 | if (ret < 0) { | |
4095 | goto exit; | |
4096 | } | |
4097 | ret = set_consumer_sockets(&ustconsumer_data); | |
a88df331 | 4098 | if (ret < 0) { |
cf3af59e | 4099 | goto exit; |
a88df331 | 4100 | } |
a88df331 DG |
4101 | /* Setup kernel tracer */ |
4102 | init_kernel_tracer(); | |
4103 | ||
4104 | /* Set ulimit for open files */ | |
4105 | set_ulimit(); | |
fac6795d DG |
4106 | } |
4107 | ||
cf3af59e MD |
4108 | if ((ret = set_signal_handler()) < 0) { |
4109 | goto exit; | |
fac6795d DG |
4110 | } |
4111 | ||
d6f42150 | 4112 | /* Setup the needed unix socket */ |
cf3af59e MD |
4113 | if ((ret = init_daemon_socket()) < 0) { |
4114 | goto exit; | |
fac6795d DG |
4115 | } |
4116 | ||
4117 | /* Set credentials to socket */ | |
cf3af59e MD |
4118 | if (is_root && ((ret = set_permissions()) < 0)) { |
4119 | goto exit; | |
fac6795d DG |
4120 | } |
4121 | ||
5b8719f5 DG |
4122 | /* Get parent pid if -S, --sig-parent is specified. */ |
4123 | if (opt_sig_parent) { | |
4124 | ppid = getppid(); | |
4125 | } | |
4126 | ||
7a485870 | 4127 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4128 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4129 | goto exit; | |
7a485870 DG |
4130 | } |
4131 | ||
099e26bd DG |
4132 | /* Setup the thread apps communication pipe. */ |
4133 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4134 | goto exit; | |
4135 | } | |
4136 | ||
4137 | /* Init UST command queue. */ | |
4138 | cds_wfq_init(&ust_cmd_queue.queue); | |
4139 | ||
f6a9efaa DG |
4140 | /* Init UST app hash table */ |
4141 | ust_app_ht_alloc(); | |
4142 | ||
273ea72c | 4143 | /* |
54d01ffb DG |
4144 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4145 | * statically declared in session.c | |
273ea72c | 4146 | */ |
54d01ffb | 4147 | session_list_ptr = session_get_list(); |
b5541356 | 4148 | |
5eb91c98 DG |
4149 | /* Set up max poll set size */ |
4150 | lttng_poll_set_max_size(); | |
4151 | ||
cf3af59e | 4152 | /* Create thread to manage the client socket */ |
099e26bd DG |
4153 | ret = pthread_create(&client_thread, NULL, |
4154 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4155 | if (ret != 0) { |
099e26bd | 4156 | perror("pthread_create clients"); |
cf3af59e MD |
4157 | goto exit_client; |
4158 | } | |
fac6795d | 4159 | |
099e26bd DG |
4160 | /* Create thread to dispatch registration */ |
4161 | ret = pthread_create(&dispatch_thread, NULL, | |
4162 | thread_dispatch_ust_registration, (void *) NULL); | |
4163 | if (ret != 0) { | |
4164 | perror("pthread_create dispatch"); | |
4165 | goto exit_dispatch; | |
4166 | } | |
4167 | ||
4168 | /* Create thread to manage application registration. */ | |
4169 | ret = pthread_create(®_apps_thread, NULL, | |
4170 | thread_registration_apps, (void *) NULL); | |
4171 | if (ret != 0) { | |
4172 | perror("pthread_create registration"); | |
4173 | goto exit_reg_apps; | |
4174 | } | |
4175 | ||
cf3af59e | 4176 | /* Create thread to manage application socket */ |
54d01ffb DG |
4177 | ret = pthread_create(&apps_thread, NULL, |
4178 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4179 | if (ret != 0) { |
099e26bd | 4180 | perror("pthread_create apps"); |
cf3af59e MD |
4181 | goto exit_apps; |
4182 | } | |
fac6795d | 4183 | |
cf3af59e | 4184 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4185 | ret = pthread_create(&kernel_thread, NULL, |
4186 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4187 | if (ret != 0) { |
099e26bd | 4188 | perror("pthread_create kernel"); |
cf3af59e MD |
4189 | goto exit_kernel; |
4190 | } | |
7a485870 | 4191 | |
cf3af59e MD |
4192 | ret = pthread_join(kernel_thread, &status); |
4193 | if (ret != 0) { | |
4194 | perror("pthread_join"); | |
4195 | goto error; /* join error, exit without cleanup */ | |
fac6795d DG |
4196 | } |
4197 | ||
cf3af59e MD |
4198 | exit_kernel: |
4199 | ret = pthread_join(apps_thread, &status); | |
4200 | if (ret != 0) { | |
4201 | perror("pthread_join"); | |
4202 | goto error; /* join error, exit without cleanup */ | |
4203 | } | |
fac6795d | 4204 | |
cf3af59e | 4205 | exit_apps: |
099e26bd DG |
4206 | ret = pthread_join(reg_apps_thread, &status); |
4207 | if (ret != 0) { | |
4208 | perror("pthread_join"); | |
4209 | goto error; /* join error, exit without cleanup */ | |
4210 | } | |
4211 | ||
4212 | exit_reg_apps: | |
4213 | ret = pthread_join(dispatch_thread, &status); | |
4214 | if (ret != 0) { | |
4215 | perror("pthread_join"); | |
4216 | goto error; /* join error, exit without cleanup */ | |
4217 | } | |
4218 | ||
4219 | exit_dispatch: | |
cf3af59e MD |
4220 | ret = pthread_join(client_thread, &status); |
4221 | if (ret != 0) { | |
4222 | perror("pthread_join"); | |
4223 | goto error; /* join error, exit without cleanup */ | |
4224 | } | |
4225 | ||
3bd1e081 | 4226 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4227 | if (ret != 0) { |
3bd1e081 | 4228 | perror("join_consumer"); |
cf3af59e MD |
4229 | goto error; /* join error, exit without cleanup */ |
4230 | } | |
a88df331 | 4231 | |
cf3af59e | 4232 | exit_client: |
a88df331 | 4233 | exit: |
cf3af59e MD |
4234 | /* |
4235 | * cleanup() is called when no other thread is running. | |
4236 | */ | |
f6a9efaa | 4237 | rcu_thread_online(); |
cf3af59e | 4238 | cleanup(); |
f6a9efaa DG |
4239 | rcu_thread_offline(); |
4240 | rcu_unregister_thread(); | |
cf3af59e MD |
4241 | if (!ret) |
4242 | exit(EXIT_SUCCESS); | |
4243 | error: | |
5e16da05 | 4244 | exit(EXIT_FAILURE); |
fac6795d | 4245 | } |