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 | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
8c0faa1d | 24 | #include <semaphore.h> |
fac6795d DG |
25 | #include <signal.h> |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c DG |
35 | #include <sys/wait.h> |
36 | #include <urcu/futex.h> | |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
0ba98ebc | 41 | #include <common/compat/poll.h> |
db758600 DG |
42 | #include <common/defaults.h> |
43 | #include <common/kernel-consumer/kernel-consumer.h> | |
44 | #include <common/ust-consumer/ust-consumer.h> | |
fac6795d | 45 | |
10a8a223 | 46 | #include "lttng-sessiond.h" |
54d01ffb | 47 | #include "channel.h" |
099e26bd | 48 | #include "context.h" |
54d01ffb | 49 | #include "event.h" |
099e26bd | 50 | #include "futex.h" |
4771f025 | 51 | #include "kernel.h" |
096102bd | 52 | #include "modprobe.h" |
0fdd1e2c | 53 | #include "shm.h" |
1e307fab | 54 | #include "ust-ctl.h" |
8e68d1c8 | 55 | #include "utils.h" |
fac6795d | 56 | |
ebaeda94 MD |
57 | #define CONSUMERD_FILE "lttng-consumerd" |
58 | ||
3bd1e081 MD |
59 | struct consumer_data { |
60 | enum lttng_consumer_type type; | |
61 | ||
62 | pthread_t thread; /* Worker thread interacting with the consumer */ | |
63 | sem_t sem; | |
64 | ||
65 | /* Mutex to control consumerd pid assignation */ | |
66 | pthread_mutex_t pid_mutex; | |
67 | pid_t pid; | |
68 | ||
69 | int err_sock; | |
70 | int cmd_sock; | |
71 | ||
72 | /* consumer error and command Unix socket path */ | |
73 | char err_unix_sock_path[PATH_MAX]; | |
74 | char cmd_unix_sock_path[PATH_MAX]; | |
75 | }; | |
76 | ||
75462a81 | 77 | /* Const values */ |
686204ab | 78 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 79 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
80 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
81 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
82 | ||
fac6795d | 83 | /* Variables */ |
1d4b027a | 84 | int opt_verbose; /* Not static for lttngerr.h */ |
3bd1e081 | 85 | int opt_verbose_consumer; /* Not static for lttngerr.h */ |
1d4b027a | 86 | int opt_quiet; /* Not static for lttngerr.h */ |
d063d709 | 87 | |
fac6795d DG |
88 | const char *progname; |
89 | const char *opt_tracing_group; | |
5b8719f5 | 90 | static int opt_sig_parent; |
fac6795d | 91 | static int opt_daemon; |
4fba7219 | 92 | static int opt_no_kernel; |
fac6795d | 93 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 94 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 95 | static char *rundir; |
3bd1e081 MD |
96 | |
97 | /* Consumer daemon specific control data */ | |
98 | static struct consumer_data kconsumer_data = { | |
99 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
100 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
101 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
3bd1e081 | 102 | }; |
7753dea8 MD |
103 | static struct consumer_data ustconsumer64_data = { |
104 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
105 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
106 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
7753dea8 MD |
107 | }; |
108 | static struct consumer_data ustconsumer32_data = { | |
109 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
110 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
111 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
3bd1e081 MD |
112 | }; |
113 | ||
099e26bd | 114 | static int dispatch_thread_exit; |
fac6795d | 115 | |
54d01ffb DG |
116 | /* Global application Unix socket path */ |
117 | static char apps_unix_sock_path[PATH_MAX]; | |
118 | /* Global client Unix socket path */ | |
119 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
120 | /* global wait shm path for UST */ |
121 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 122 | |
1d4b027a | 123 | /* Sockets and FDs */ |
d6f42150 DG |
124 | static int client_sock; |
125 | static int apps_sock; | |
20fe2104 | 126 | static int kernel_tracer_fd; |
7a485870 | 127 | static int kernel_poll_pipe[2]; |
1d4b027a | 128 | |
273ea72c DG |
129 | /* |
130 | * Quit pipe for all threads. This permits a single cancellation point | |
131 | * for all threads when receiving an event on the pipe. | |
132 | */ | |
133 | static int thread_quit_pipe[2]; | |
134 | ||
099e26bd DG |
135 | /* |
136 | * This pipe is used to inform the thread managing application communication | |
137 | * that a command is queued and ready to be processed. | |
138 | */ | |
139 | static int apps_cmd_pipe[2]; | |
140 | ||
1d4b027a | 141 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 142 | static pthread_t apps_thread; |
099e26bd | 143 | static pthread_t reg_apps_thread; |
1d4b027a | 144 | static pthread_t client_thread; |
7a485870 | 145 | static pthread_t kernel_thread; |
099e26bd | 146 | static pthread_t dispatch_thread; |
5eb91c98 | 147 | |
fac6795d | 148 | |
099e26bd DG |
149 | /* |
150 | * UST registration command queue. This queue is tied with a futex and uses a N | |
151 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
152 | * | |
153 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
154 | * this queue and the wait/wake scheme. | |
155 | */ | |
156 | static struct ust_cmd_queue ust_cmd_queue; | |
157 | ||
b5541356 DG |
158 | /* |
159 | * Pointer initialized before thread creation. | |
160 | * | |
161 | * This points to the tracing session list containing the session count and a | |
162 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
163 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 164 | * |
d063d709 | 165 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 166 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
167 | */ |
168 | static struct ltt_session_list *session_list_ptr; | |
169 | ||
7753dea8 MD |
170 | int ust_consumerd64_fd = -1; |
171 | int ust_consumerd32_fd = -1; | |
172 | ||
fb6f1fa2 YB |
173 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
174 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
175 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
176 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a MD |
177 | |
178 | static | |
7753dea8 | 179 | void setup_consumerd_path(void) |
fb09408a | 180 | { |
fc7a59ce | 181 | const char *bin, *libdir; |
fb09408a | 182 | |
7753dea8 MD |
183 | /* |
184 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
185 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
186 | * has not been defined. | |
7753dea8 | 187 | */ |
ebaeda94 | 188 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
189 | if (!consumerd32_bin[0]) { |
190 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
191 | } |
192 | if (!consumerd32_libdir[0]) { | |
193 | consumerd32_libdir = INSTALL_LIB_PATH; | |
194 | } | |
195 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
196 | if (!consumerd64_bin[0]) { |
197 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 198 | } |
ebaeda94 MD |
199 | if (!consumerd64_libdir[0]) { |
200 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
201 | } |
202 | #else | |
203 | #error "Unknown bitness" | |
204 | #endif | |
205 | ||
fb09408a MD |
206 | /* |
207 | * runtime env. var. overrides the build default. | |
208 | */ | |
fc7a59ce AM |
209 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
210 | if (bin) { | |
211 | consumerd32_bin = bin; | |
7753dea8 | 212 | } |
fc7a59ce AM |
213 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
214 | if (bin) { | |
215 | consumerd64_bin = bin; | |
ebaeda94 | 216 | } |
72f579ee | 217 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
218 | if (libdir) { |
219 | consumerd32_libdir = libdir; | |
220 | } | |
72f579ee | 221 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
222 | if (libdir) { |
223 | consumerd64_libdir = libdir; | |
fb09408a MD |
224 | } |
225 | } | |
226 | ||
5eb91c98 DG |
227 | /* |
228 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
229 | */ | |
230 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
231 | unsigned int size) | |
232 | { | |
233 | int ret; | |
234 | ||
235 | if (events == NULL || size == 0) { | |
236 | ret = -1; | |
237 | goto error; | |
238 | } | |
239 | ||
240 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
241 | if (ret < 0) { | |
242 | goto error; | |
243 | } | |
244 | ||
245 | /* Add quit pipe */ | |
246 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
247 | if (ret < 0) { | |
248 | goto error; | |
249 | } | |
250 | ||
251 | return 0; | |
252 | ||
253 | error: | |
254 | return ret; | |
255 | } | |
256 | ||
257 | /* | |
258 | * Check if the thread quit pipe was triggered. | |
259 | * | |
260 | * Return 1 if it was triggered else 0; | |
261 | */ | |
262 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
263 | { | |
264 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
265 | return 1; | |
266 | } | |
267 | ||
268 | return 0; | |
269 | } | |
270 | ||
0fdd1e2c DG |
271 | /* |
272 | * Return group ID of the tracing group or -1 if not found. | |
273 | */ | |
996b65c8 MD |
274 | static gid_t allowed_group(void) |
275 | { | |
276 | struct group *grp; | |
277 | ||
274e143b MD |
278 | if (opt_tracing_group) { |
279 | grp = getgrnam(opt_tracing_group); | |
280 | } else { | |
281 | grp = getgrnam(default_tracing_group); | |
282 | } | |
996b65c8 MD |
283 | if (!grp) { |
284 | return -1; | |
285 | } else { | |
286 | return grp->gr_gid; | |
287 | } | |
288 | } | |
289 | ||
273ea72c | 290 | /* |
5eb91c98 | 291 | * Init thread quit pipe. |
273ea72c DG |
292 | * |
293 | * Return -1 on error or 0 if all pipes are created. | |
294 | */ | |
295 | static int init_thread_quit_pipe(void) | |
296 | { | |
a4405090 | 297 | int ret, i; |
273ea72c | 298 | |
a4405090 | 299 | ret = pipe(thread_quit_pipe); |
273ea72c | 300 | if (ret < 0) { |
a4405090 | 301 | PERROR("thread quit pipe"); |
273ea72c DG |
302 | goto error; |
303 | } | |
304 | ||
a4405090 DG |
305 | for (i = 0; i < 2; i++) { |
306 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
307 | if (ret < 0) { | |
308 | PERROR("fcntl"); | |
309 | goto error; | |
310 | } | |
311 | } | |
312 | ||
273ea72c DG |
313 | error: |
314 | return ret; | |
315 | } | |
316 | ||
fac6795d | 317 | /* |
d063d709 DG |
318 | * Complete teardown of a kernel session. This free all data structure related |
319 | * to a kernel session and update counter. | |
fac6795d | 320 | */ |
1d4b027a | 321 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 322 | { |
8f7a84dd | 323 | if (!session->kernel_session) { |
99bab54f | 324 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 325 | return; |
8f7a84dd DG |
326 | } |
327 | ||
84ea9c99 | 328 | DBG("Tearing down kernel session"); |
d9800920 | 329 | |
84ea9c99 MD |
330 | /* |
331 | * If a custom kernel consumer was registered, close the socket before | |
332 | * tearing down the complete kernel session structure | |
333 | */ | |
334 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
335 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); | |
fac6795d | 336 | } |
84ea9c99 MD |
337 | |
338 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
339 | } |
340 | ||
f6a9efaa DG |
341 | /* |
342 | * Complete teardown of all UST sessions. This will free everything on his path | |
343 | * and destroy the core essence of all ust sessions :) | |
344 | */ | |
345 | static void teardown_ust_session(struct ltt_session *session) | |
346 | { | |
84cd17c6 MD |
347 | int ret; |
348 | ||
8f7a84dd | 349 | if (!session->ust_session) { |
99bab54f | 350 | DBG3("No UST session when tearing down session"); |
f470a390 | 351 | return; |
8f7a84dd DG |
352 | } |
353 | ||
84ea9c99 | 354 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 355 | |
84cd17c6 MD |
356 | ret = ust_app_destroy_trace_all(session->ust_session); |
357 | if (ret) { | |
358 | ERR("Error in ust_app_destroy_trace_all"); | |
359 | } | |
8f7a84dd | 360 | |
f6a9efaa DG |
361 | trace_ust_destroy_session(session->ust_session); |
362 | } | |
363 | ||
099e26bd DG |
364 | /* |
365 | * Stop all threads by closing the thread quit pipe. | |
366 | */ | |
cf3af59e MD |
367 | static void stop_threads(void) |
368 | { | |
5eb91c98 DG |
369 | int ret; |
370 | ||
cf3af59e MD |
371 | /* Stopping all threads */ |
372 | DBG("Terminating all threads"); | |
54d01ffb | 373 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
374 | if (ret < 0) { |
375 | ERR("write error on thread quit pipe"); | |
376 | } | |
377 | ||
099e26bd DG |
378 | /* Dispatch thread */ |
379 | dispatch_thread_exit = 1; | |
380 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
381 | } |
382 | ||
fac6795d | 383 | /* |
d063d709 | 384 | * Cleanup the daemon |
fac6795d | 385 | */ |
cf3af59e | 386 | static void cleanup(void) |
fac6795d | 387 | { |
1d4b027a DG |
388 | int ret; |
389 | char *cmd; | |
af9737e9 | 390 | struct ltt_session *sess, *stmp; |
fac6795d | 391 | |
1d4b027a | 392 | DBG("Cleaning up"); |
e07ae692 | 393 | |
67e40797 DG |
394 | DBG("Removing %s directory", rundir); |
395 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
396 | if (ret < 0) { | |
397 | ERR("asprintf failed. Something is really wrong!"); | |
398 | } | |
5461b305 | 399 | |
67e40797 DG |
400 | /* Remove lttng run directory */ |
401 | ret = system(cmd); | |
402 | if (ret < 0) { | |
403 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 404 | } |
67e40797 | 405 | free(cmd); |
5461b305 | 406 | |
99bab54f | 407 | DBG("Cleaning up all sessions"); |
fac6795d | 408 | |
b5541356 | 409 | /* Destroy session list mutex */ |
273ea72c DG |
410 | if (session_list_ptr != NULL) { |
411 | pthread_mutex_destroy(&session_list_ptr->lock); | |
412 | ||
413 | /* Cleanup ALL session */ | |
54d01ffb DG |
414 | cds_list_for_each_entry_safe(sess, stmp, |
415 | &session_list_ptr->head, list) { | |
273ea72c | 416 | teardown_kernel_session(sess); |
f6a9efaa DG |
417 | teardown_ust_session(sess); |
418 | free(sess); | |
273ea72c DG |
419 | } |
420 | } | |
421 | ||
099e26bd | 422 | DBG("Closing all UST sockets"); |
56fff090 | 423 | ust_app_clean_list(); |
099e26bd | 424 | |
3bd1e081 | 425 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 426 | |
4fba7219 DG |
427 | if (is_root && !opt_no_kernel) { |
428 | DBG2("Closing kernel fd"); | |
429 | close(kernel_tracer_fd); | |
2f50c8a3 | 430 | DBG("Unloading kernel modules"); |
096102bd | 431 | modprobe_remove_lttng_all(); |
2f50c8a3 | 432 | } |
5eb91c98 DG |
433 | |
434 | close(thread_quit_pipe[0]); | |
435 | close(thread_quit_pipe[1]); | |
421cb601 DG |
436 | |
437 | /* <fun> */ | |
f56a39af | 438 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
439 | "Matthew, BEET driven development works!%c[%dm", |
440 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
441 | /* </fun> */ | |
fac6795d DG |
442 | } |
443 | ||
e065084a | 444 | /* |
d063d709 | 445 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 446 | * |
d063d709 | 447 | * Return lttcomm error code. |
e065084a DG |
448 | */ |
449 | static int send_unix_sock(int sock, void *buf, size_t len) | |
450 | { | |
451 | /* Check valid length */ | |
452 | if (len <= 0) { | |
453 | return -1; | |
454 | } | |
455 | ||
456 | return lttcomm_send_unix_sock(sock, buf, len); | |
457 | } | |
458 | ||
5461b305 | 459 | /* |
d063d709 | 460 | * Free memory of a command context structure. |
5461b305 | 461 | */ |
a2fb29a5 | 462 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 463 | { |
a2fb29a5 DG |
464 | DBG("Clean command context structure"); |
465 | if (*cmd_ctx) { | |
466 | if ((*cmd_ctx)->llm) { | |
467 | free((*cmd_ctx)->llm); | |
5461b305 | 468 | } |
a2fb29a5 DG |
469 | if ((*cmd_ctx)->lsm) { |
470 | free((*cmd_ctx)->lsm); | |
5461b305 | 471 | } |
a2fb29a5 DG |
472 | free(*cmd_ctx); |
473 | *cmd_ctx = NULL; | |
5461b305 DG |
474 | } |
475 | } | |
476 | ||
f3ed775e | 477 | /* |
d063d709 | 478 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 479 | */ |
2bdd86d4 | 480 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
481 | int sock, struct ltt_kernel_channel *channel, |
482 | uid_t uid, gid_t gid) | |
f3ed775e DG |
483 | { |
484 | int ret; | |
f3ed775e | 485 | struct ltt_kernel_stream *stream; |
3bd1e081 | 486 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 487 | |
3bd1e081 | 488 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 489 | channel->channel->name); |
f3ed775e | 490 | |
3bd1e081 MD |
491 | /* Send channel */ |
492 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
493 | lkm.u.channel.channel_key = channel->fd; | |
494 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
495 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 496 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 497 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 498 | if (ret < 0) { |
3bd1e081 | 499 | perror("send consumer channel"); |
f3ed775e DG |
500 | goto error; |
501 | } | |
502 | ||
3bd1e081 | 503 | /* Send streams */ |
7a485870 | 504 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
505 | if (!stream->fd) { |
506 | continue; | |
507 | } | |
508 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
509 | lkm.u.stream.channel_key = channel->fd; | |
510 | lkm.u.stream.stream_key = stream->fd; | |
511 | lkm.u.stream.state = stream->state; | |
512 | lkm.u.stream.output = channel->channel->attr.output; | |
513 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
514 | lkm.u.stream.uid = uid; |
515 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
516 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
517 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
518 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
519 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
520 | if (ret < 0) { | |
521 | perror("send consumer stream"); | |
522 | goto error; | |
523 | } | |
524 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
525 | if (ret < 0) { | |
526 | perror("send consumer stream ancillary data"); | |
527 | goto error; | |
f3ed775e DG |
528 | } |
529 | } | |
530 | ||
3bd1e081 | 531 | DBG("consumer channel streams sent"); |
f3ed775e DG |
532 | |
533 | return 0; | |
534 | ||
535 | error: | |
536 | return ret; | |
537 | } | |
538 | ||
539 | /* | |
d063d709 | 540 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 541 | */ |
2bdd86d4 | 542 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 543 | struct ltt_kernel_session *session) |
f3ed775e DG |
544 | { |
545 | int ret; | |
546 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
547 | struct lttcomm_consumer_msg lkm; |
548 | int sock = session->consumer_fd; | |
7a485870 DG |
549 | |
550 | DBG("Sending metadata stream fd"); | |
551 | ||
2bdd86d4 | 552 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 553 | if (session->consumer_fd == 0) { |
3bd1e081 | 554 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
555 | } |
556 | ||
7a485870 | 557 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
558 | /* Send metadata channel fd */ |
559 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
560 | lkm.u.channel.channel_key = session->metadata->fd; | |
561 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
562 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
563 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
564 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
565 | if (ret < 0) { | |
566 | perror("send consumer channel"); | |
567 | goto error; | |
568 | } | |
569 | ||
570 | /* Send metadata stream fd */ | |
571 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
572 | lkm.u.stream.channel_key = session->metadata->fd; | |
573 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
574 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
575 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
576 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
577 | lkm.u.stream.uid = session->uid; |
578 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
579 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
580 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
581 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
582 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
583 | if (ret < 0) { | |
584 | perror("send consumer stream"); | |
585 | goto error; | |
586 | } | |
587 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 588 | if (ret < 0) { |
3bd1e081 | 589 | perror("send consumer stream"); |
7a485870 DG |
590 | goto error; |
591 | } | |
592 | } | |
f3ed775e | 593 | |
f3ed775e | 594 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
595 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
596 | session->uid, session->gid); | |
2bdd86d4 MD |
597 | if (ret < 0) { |
598 | goto error; | |
599 | } | |
600 | } | |
601 | ||
602 | DBG("consumer fds (metadata and channel streams) sent"); | |
603 | ||
604 | return 0; | |
605 | ||
606 | error: | |
607 | return ret; | |
608 | } | |
609 | ||
fac6795d | 610 | /* |
0fdd1e2c | 611 | * Notify UST applications using the shm mmap futex. |
fac6795d | 612 | */ |
0fdd1e2c | 613 | static int notify_ust_apps(int active) |
fac6795d | 614 | { |
0fdd1e2c | 615 | char *wait_shm_mmap; |
fac6795d | 616 | |
0fdd1e2c | 617 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 618 | |
0fdd1e2c DG |
619 | /* See shm.c for this call implying mmap, shm and futex calls */ |
620 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
621 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
622 | goto error; |
623 | } | |
624 | ||
0fdd1e2c DG |
625 | /* Wake waiting process */ |
626 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
627 | ||
628 | /* Apps notified successfully */ | |
629 | return 0; | |
fac6795d DG |
630 | |
631 | error: | |
0fdd1e2c | 632 | return -1; |
fac6795d DG |
633 | } |
634 | ||
e065084a | 635 | /* |
d063d709 DG |
636 | * Setup the outgoing data buffer for the response (llm) by allocating the |
637 | * right amount of memory and copying the original information from the lsm | |
638 | * structure. | |
ca95a216 | 639 | * |
d063d709 | 640 | * Return total size of the buffer pointed by buf. |
ca95a216 | 641 | */ |
5461b305 | 642 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 643 | { |
f3ed775e | 644 | int ret, buf_size; |
ca95a216 | 645 | |
f3ed775e | 646 | buf_size = size; |
5461b305 | 647 | |
ba7f0ae5 | 648 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 649 | if (cmd_ctx->llm == NULL) { |
ba7f0ae5 | 650 | perror("zmalloc"); |
5461b305 | 651 | ret = -ENOMEM; |
ca95a216 DG |
652 | goto error; |
653 | } | |
654 | ||
5461b305 DG |
655 | /* Copy common data */ |
656 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 657 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 658 | |
5461b305 DG |
659 | cmd_ctx->llm->data_size = size; |
660 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
661 | ||
ca95a216 DG |
662 | return buf_size; |
663 | ||
664 | error: | |
665 | return ret; | |
666 | } | |
667 | ||
7a485870 | 668 | /* |
5eb91c98 | 669 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 670 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 671 | */ |
5eb91c98 | 672 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 673 | { |
5eb91c98 | 674 | int ret; |
7a485870 DG |
675 | struct ltt_session *session; |
676 | struct ltt_kernel_channel *channel; | |
677 | ||
5eb91c98 | 678 | DBG("Updating kernel poll set"); |
7a485870 | 679 | |
54d01ffb | 680 | session_lock_list(); |
b5541356 | 681 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 682 | session_lock(session); |
7a485870 | 683 | if (session->kernel_session == NULL) { |
54d01ffb | 684 | session_unlock(session); |
7a485870 DG |
685 | continue; |
686 | } | |
7a485870 | 687 | |
54d01ffb DG |
688 | cds_list_for_each_entry(channel, |
689 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
690 | /* Add channel fd to the kernel poll set */ |
691 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
692 | if (ret < 0) { | |
54d01ffb | 693 | session_unlock(session); |
5eb91c98 DG |
694 | goto error; |
695 | } | |
696 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 697 | } |
54d01ffb | 698 | session_unlock(session); |
7a485870 | 699 | } |
54d01ffb | 700 | session_unlock_list(); |
7a485870 | 701 | |
5eb91c98 | 702 | return 0; |
7a485870 DG |
703 | |
704 | error: | |
54d01ffb | 705 | session_unlock_list(); |
7a485870 DG |
706 | return -1; |
707 | } | |
708 | ||
709 | /* | |
54d01ffb | 710 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 711 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 712 | * |
d063d709 | 713 | * Useful for CPU hotplug feature. |
7a485870 | 714 | */ |
2bdd86d4 | 715 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
716 | { |
717 | int ret = 0; | |
718 | struct ltt_session *session; | |
719 | struct ltt_kernel_channel *channel; | |
720 | ||
721 | DBG("Updating kernel streams for channel fd %d", fd); | |
722 | ||
54d01ffb | 723 | session_lock_list(); |
b5541356 | 724 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 725 | session_lock(session); |
7a485870 | 726 | if (session->kernel_session == NULL) { |
54d01ffb | 727 | session_unlock(session); |
7a485870 DG |
728 | continue; |
729 | } | |
d9800920 DG |
730 | |
731 | /* This is not suppose to be 0 but this is an extra security check */ | |
732 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 733 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
734 | } |
735 | ||
5eb91c98 DG |
736 | cds_list_for_each_entry(channel, |
737 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
738 | if (channel->fd == fd) { |
739 | DBG("Channel found, updating kernel streams"); | |
740 | ret = kernel_open_channel_stream(channel); | |
741 | if (ret < 0) { | |
b3c750d2 | 742 | goto error; |
7a485870 | 743 | } |
d9800920 | 744 | |
7a485870 | 745 | /* |
5eb91c98 DG |
746 | * Have we already sent fds to the consumer? If yes, it means |
747 | * that tracing is started so it is safe to send our updated | |
748 | * stream fds. | |
7a485870 | 749 | */ |
3bd1e081 | 750 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 751 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
752 | session->kernel_session->consumer_fd, channel, |
753 | session->uid, session->gid); | |
7a485870 | 754 | if (ret < 0) { |
b3c750d2 | 755 | goto error; |
7a485870 DG |
756 | } |
757 | } | |
b3c750d2 | 758 | goto error; |
7a485870 DG |
759 | } |
760 | } | |
54d01ffb | 761 | session_unlock(session); |
7a485870 | 762 | } |
54d01ffb | 763 | session_unlock_list(); |
b3c750d2 | 764 | return ret; |
7a485870 | 765 | |
b3c750d2 | 766 | error: |
54d01ffb DG |
767 | session_unlock(session); |
768 | session_unlock_list(); | |
7a485870 DG |
769 | return ret; |
770 | } | |
771 | ||
487cf67c DG |
772 | /* |
773 | * For each tracing session, update newly registered apps. | |
774 | */ | |
775 | static void update_ust_app(int app_sock) | |
776 | { | |
777 | struct ltt_session *sess, *stmp; | |
778 | ||
4ee14516 DG |
779 | session_lock_list(); |
780 | ||
487cf67c DG |
781 | /* For all tracing session(s) */ |
782 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 783 | session_lock(sess); |
421cb601 DG |
784 | if (sess->ust_session) { |
785 | ust_app_global_update(sess->ust_session, app_sock); | |
786 | } | |
4ee14516 | 787 | session_unlock(sess); |
487cf67c | 788 | } |
4ee14516 DG |
789 | |
790 | session_unlock_list(); | |
487cf67c DG |
791 | } |
792 | ||
7a485870 | 793 | /* |
d063d709 | 794 | * This thread manage event coming from the kernel. |
7a485870 | 795 | * |
d063d709 DG |
796 | * Features supported in this thread: |
797 | * -) CPU Hotplug | |
7a485870 DG |
798 | */ |
799 | static void *thread_manage_kernel(void *data) | |
800 | { | |
5eb91c98 DG |
801 | int ret, i, pollfd, update_poll_flag = 1; |
802 | uint32_t revents, nb_fd; | |
7a485870 | 803 | char tmp; |
5eb91c98 | 804 | struct lttng_poll_event events; |
7a485870 DG |
805 | |
806 | DBG("Thread manage kernel started"); | |
807 | ||
5eb91c98 DG |
808 | ret = create_thread_poll_set(&events, 2); |
809 | if (ret < 0) { | |
810 | goto error; | |
811 | } | |
812 | ||
813 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
814 | if (ret < 0) { | |
815 | goto error; | |
816 | } | |
817 | ||
7a485870 DG |
818 | while (1) { |
819 | if (update_poll_flag == 1) { | |
5f822d0a DG |
820 | /* |
821 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
822 | * quit pipe and the kernel pipe. | |
823 | */ | |
824 | events.nb_fd = 2; | |
825 | ||
5eb91c98 DG |
826 | ret = update_kernel_poll(&events); |
827 | if (ret < 0) { | |
7a485870 DG |
828 | goto error; |
829 | } | |
830 | update_poll_flag = 0; | |
831 | } | |
832 | ||
5eb91c98 DG |
833 | nb_fd = LTTNG_POLL_GETNB(&events); |
834 | ||
835 | DBG("Thread kernel polling on %d fds", nb_fd); | |
836 | ||
837 | /* Zeroed the poll events */ | |
838 | lttng_poll_reset(&events); | |
7a485870 DG |
839 | |
840 | /* Poll infinite value of time */ | |
5eb91c98 | 841 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 842 | if (ret < 0) { |
7a485870 DG |
843 | goto error; |
844 | } else if (ret == 0) { | |
845 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
846 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
847 | "This should not have happened! Continuing..."); | |
7a485870 DG |
848 | continue; |
849 | } | |
850 | ||
5eb91c98 DG |
851 | for (i = 0; i < nb_fd; i++) { |
852 | /* Fetch once the poll data */ | |
853 | revents = LTTNG_POLL_GETEV(&events, i); | |
854 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 855 | |
5eb91c98 DG |
856 | /* Thread quit pipe has been closed. Killing thread. */ |
857 | ret = check_thread_quit_pipe(pollfd, revents); | |
858 | if (ret) { | |
859 | goto error; | |
860 | } | |
7a485870 | 861 | |
5eb91c98 DG |
862 | /* Check for data on kernel pipe */ |
863 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
864 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
865 | update_poll_flag = 1; | |
866 | continue; | |
867 | } else { | |
868 | /* | |
869 | * New CPU detected by the kernel. Adding kernel stream to | |
870 | * kernel session and updating the kernel consumer | |
871 | */ | |
872 | if (revents & LPOLLIN) { | |
2bdd86d4 | 873 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
874 | if (ret < 0) { |
875 | continue; | |
876 | } | |
877 | break; | |
878 | /* | |
879 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
880 | * and unregister kernel stream at this point. | |
881 | */ | |
7a485870 | 882 | } |
7a485870 DG |
883 | } |
884 | } | |
885 | } | |
886 | ||
887 | error: | |
888 | DBG("Kernel thread dying"); | |
273ea72c DG |
889 | close(kernel_poll_pipe[0]); |
890 | close(kernel_poll_pipe[1]); | |
5eb91c98 DG |
891 | |
892 | lttng_poll_clean(&events); | |
893 | ||
7a485870 DG |
894 | return NULL; |
895 | } | |
896 | ||
1d4b027a | 897 | /* |
3bd1e081 | 898 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 899 | */ |
3bd1e081 | 900 | static void *thread_manage_consumer(void *data) |
1d4b027a | 901 | { |
5eb91c98 DG |
902 | int sock = 0, i, ret, pollfd; |
903 | uint32_t revents, nb_fd; | |
1d4b027a | 904 | enum lttcomm_return_code code; |
5eb91c98 | 905 | struct lttng_poll_event events; |
3bd1e081 | 906 | struct consumer_data *consumer_data = data; |
1d4b027a | 907 | |
3bd1e081 | 908 | DBG("[thread] Manage consumer started"); |
1d4b027a | 909 | |
3bd1e081 | 910 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
911 | if (ret < 0) { |
912 | goto error; | |
913 | } | |
914 | ||
5eb91c98 DG |
915 | /* |
916 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
917 | * Nothing more will be added to this poll set. | |
918 | */ | |
919 | ret = create_thread_poll_set(&events, 2); | |
920 | if (ret < 0) { | |
921 | goto error; | |
922 | } | |
273ea72c | 923 | |
3bd1e081 | 924 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
925 | if (ret < 0) { |
926 | goto error; | |
927 | } | |
928 | ||
929 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
930 | |
931 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 932 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 933 | if (ret < 0) { |
273ea72c DG |
934 | goto error; |
935 | } | |
936 | ||
5eb91c98 DG |
937 | for (i = 0; i < nb_fd; i++) { |
938 | /* Fetch once the poll data */ | |
939 | revents = LTTNG_POLL_GETEV(&events, i); | |
940 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
941 | ||
942 | /* Thread quit pipe has been closed. Killing thread. */ | |
943 | ret = check_thread_quit_pipe(pollfd, revents); | |
944 | if (ret) { | |
945 | goto error; | |
946 | } | |
947 | ||
948 | /* Event on the registration socket */ | |
3bd1e081 | 949 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 950 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 951 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
952 | goto error; |
953 | } | |
954 | } | |
273ea72c DG |
955 | } |
956 | ||
3bd1e081 | 957 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
958 | if (sock < 0) { |
959 | goto error; | |
960 | } | |
961 | ||
3bd1e081 | 962 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 963 | |
712ea556 | 964 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
965 | ret = lttcomm_recv_unix_sock(sock, &code, |
966 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
967 | if (ret <= 0) { |
968 | goto error; | |
969 | } | |
970 | ||
3bd1e081 MD |
971 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
972 | consumer_data->cmd_sock = | |
973 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
974 | if (consumer_data->cmd_sock < 0) { | |
975 | sem_post(&consumer_data->sem); | |
48842b30 | 976 | PERROR("consumer connect"); |
1d4b027a DG |
977 | goto error; |
978 | } | |
979 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
980 | sem_post(&consumer_data->sem); |
981 | DBG("consumer command socket ready"); | |
1d4b027a | 982 | } else { |
3bd1e081 | 983 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
984 | lttcomm_get_readable_code(-code)); |
985 | goto error; | |
986 | } | |
987 | ||
54d01ffb | 988 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 989 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 990 | if (ret < 0) { |
72079cae DG |
991 | goto error; |
992 | } | |
993 | ||
5eb91c98 DG |
994 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
995 | if (ret < 0) { | |
72079cae | 996 | goto error; |
5eb91c98 DG |
997 | } |
998 | ||
999 | /* Update number of fd */ | |
1000 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1001 | ||
1002 | /* Inifinite blocking call, waiting for transmission */ | |
1003 | ret = lttng_poll_wait(&events, -1); | |
1004 | if (ret < 0) { | |
72079cae DG |
1005 | goto error; |
1006 | } | |
1007 | ||
5eb91c98 DG |
1008 | for (i = 0; i < nb_fd; i++) { |
1009 | /* Fetch once the poll data */ | |
1010 | revents = LTTNG_POLL_GETEV(&events, i); | |
1011 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1012 | ||
1013 | /* Thread quit pipe has been closed. Killing thread. */ | |
1014 | ret = check_thread_quit_pipe(pollfd, revents); | |
1015 | if (ret) { | |
1016 | goto error; | |
1017 | } | |
1018 | ||
1019 | /* Event on the kconsumerd socket */ | |
1020 | if (pollfd == sock) { | |
1021 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1022 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1023 | goto error; |
1024 | } | |
1025 | } | |
1026 | } | |
1027 | ||
712ea556 | 1028 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1029 | ret = lttcomm_recv_unix_sock(sock, &code, |
1030 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1031 | if (ret <= 0) { |
3bd1e081 | 1032 | ERR("consumer closed the command socket"); |
712ea556 | 1033 | goto error; |
6f61d021 | 1034 | } |
1d4b027a | 1035 | |
3bd1e081 | 1036 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1037 | |
1d4b027a | 1038 | error: |
3bd1e081 MD |
1039 | DBG("consumer thread dying"); |
1040 | close(consumer_data->err_sock); | |
1041 | close(consumer_data->cmd_sock); | |
5eb91c98 | 1042 | close(sock); |
273ea72c | 1043 | |
3bd1e081 MD |
1044 | unlink(consumer_data->err_unix_sock_path); |
1045 | unlink(consumer_data->cmd_unix_sock_path); | |
1046 | consumer_data->pid = 0; | |
1d4b027a | 1047 | |
5eb91c98 | 1048 | lttng_poll_clean(&events); |
0177d773 | 1049 | |
5eb91c98 | 1050 | return NULL; |
099e26bd DG |
1051 | } |
1052 | ||
099e26bd DG |
1053 | /* |
1054 | * This thread manage application communication. | |
1d4b027a DG |
1055 | */ |
1056 | static void *thread_manage_apps(void *data) | |
099e26bd | 1057 | { |
5eb91c98 DG |
1058 | int i, ret, pollfd; |
1059 | uint32_t revents, nb_fd; | |
099e26bd | 1060 | struct ust_command ust_cmd; |
5eb91c98 | 1061 | struct lttng_poll_event events; |
099e26bd DG |
1062 | |
1063 | DBG("[thread] Manage application started"); | |
1064 | ||
f6a9efaa DG |
1065 | rcu_register_thread(); |
1066 | rcu_thread_online(); | |
1067 | ||
5eb91c98 DG |
1068 | ret = create_thread_poll_set(&events, 2); |
1069 | if (ret < 0) { | |
1070 | goto error; | |
1071 | } | |
099e26bd | 1072 | |
5eb91c98 DG |
1073 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1074 | if (ret < 0) { | |
1075 | goto error; | |
1076 | } | |
099e26bd | 1077 | |
5eb91c98 DG |
1078 | while (1) { |
1079 | /* Zeroed the events structure */ | |
1080 | lttng_poll_reset(&events); | |
0177d773 | 1081 | |
5eb91c98 | 1082 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1083 | |
1084 | DBG("Apps thread polling on %d fds", nb_fd); | |
1085 | ||
1086 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 1087 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1088 | if (ret < 0) { |
099e26bd DG |
1089 | goto error; |
1090 | } | |
1091 | ||
5eb91c98 DG |
1092 | for (i = 0; i < nb_fd; i++) { |
1093 | /* Fetch once the poll data */ | |
1094 | revents = LTTNG_POLL_GETEV(&events, i); | |
1095 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1096 | ||
1097 | /* Thread quit pipe has been closed. Killing thread. */ | |
1098 | ret = check_thread_quit_pipe(pollfd, revents); | |
1099 | if (ret) { | |
099e26bd | 1100 | goto error; |
5eb91c98 | 1101 | } |
099e26bd | 1102 | |
5eb91c98 DG |
1103 | /* Inspect the apps cmd pipe */ |
1104 | if (pollfd == apps_cmd_pipe[0]) { | |
1105 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1106 | ERR("Apps command pipe error"); | |
0177d773 | 1107 | goto error; |
5eb91c98 DG |
1108 | } else if (revents & LPOLLIN) { |
1109 | /* Empty pipe */ | |
1110 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1111 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
1112 | perror("read apps cmd pipe"); | |
1113 | goto error; | |
1114 | } | |
099e26bd | 1115 | |
5eb91c98 | 1116 | /* Register applicaton to the session daemon */ |
56fff090 | 1117 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1118 | ust_cmd.sock); |
88ff5b7f | 1119 | if (ret == -ENOMEM) { |
5eb91c98 | 1120 | goto error; |
88ff5b7f MD |
1121 | } else if (ret < 0) { |
1122 | break; | |
5eb91c98 DG |
1123 | } |
1124 | ||
acc7b41b | 1125 | /* |
e0c7ec2b | 1126 | * Validate UST version compatibility. |
acc7b41b | 1127 | */ |
e0c7ec2b DG |
1128 | ret = ust_app_validate_version(ust_cmd.sock); |
1129 | if (ret >= 0) { | |
1130 | /* | |
1131 | * Add channel(s) and event(s) to newly registered apps | |
1132 | * from lttng global UST domain. | |
1133 | */ | |
1134 | update_ust_app(ust_cmd.sock); | |
1135 | } | |
acc7b41b | 1136 | |
f2ca2e25 | 1137 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1138 | if (ret < 0) { |
1139 | /* | |
1140 | * If the registration is not possible, we simply | |
1141 | * unregister the apps and continue | |
1142 | */ | |
56fff090 | 1143 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1144 | } else { |
1145 | /* | |
1146 | * We just need here to monitor the close of the UST | |
1147 | * socket and poll set monitor those by default. | |
1148 | */ | |
1149 | ret = lttng_poll_add(&events, ust_cmd.sock, 0); | |
1150 | if (ret < 0) { | |
1151 | goto error; | |
1152 | } | |
1153 | ||
54d01ffb DG |
1154 | DBG("Apps with sock %d added to poll set", |
1155 | ust_cmd.sock); | |
5eb91c98 | 1156 | } |
487cf67c | 1157 | |
5eb91c98 | 1158 | break; |
0177d773 | 1159 | } |
5eb91c98 DG |
1160 | } else { |
1161 | /* | |
54d01ffb DG |
1162 | * At this point, we know that a registered application made |
1163 | * the event at poll_wait. | |
5eb91c98 DG |
1164 | */ |
1165 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1166 | /* Removing from the poll set */ | |
1167 | ret = lttng_poll_del(&events, pollfd); | |
1168 | if (ret < 0) { | |
1169 | goto error; | |
1170 | } | |
099e26bd | 1171 | |
b9d9b220 | 1172 | /* Socket closed on remote end. */ |
56fff090 | 1173 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1174 | break; |
1175 | } | |
099e26bd DG |
1176 | } |
1177 | } | |
099e26bd DG |
1178 | } |
1179 | ||
1180 | error: | |
1181 | DBG("Application communication apps dying"); | |
1182 | close(apps_cmd_pipe[0]); | |
1183 | close(apps_cmd_pipe[1]); | |
1184 | ||
5eb91c98 | 1185 | lttng_poll_clean(&events); |
099e26bd | 1186 | |
f6a9efaa DG |
1187 | rcu_thread_offline(); |
1188 | rcu_unregister_thread(); | |
099e26bd DG |
1189 | return NULL; |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * Dispatch request from the registration threads to the application | |
1194 | * communication thread. | |
1195 | */ | |
1196 | static void *thread_dispatch_ust_registration(void *data) | |
1197 | { | |
1198 | int ret; | |
1199 | struct cds_wfq_node *node; | |
1200 | struct ust_command *ust_cmd = NULL; | |
1201 | ||
1202 | DBG("[thread] Dispatch UST command started"); | |
1203 | ||
1204 | while (!dispatch_thread_exit) { | |
1205 | /* Atomically prepare the queue futex */ | |
1206 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1207 | ||
1208 | do { | |
1209 | /* Dequeue command for registration */ | |
1210 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1211 | if (node == NULL) { | |
00a17c97 | 1212 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1213 | /* Continue thread execution */ |
1214 | break; | |
1215 | } | |
1216 | ||
1217 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1218 | ||
2f50c8a3 DG |
1219 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1220 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1221 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1222 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1223 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1224 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1225 | /* |
1226 | * Inform apps thread of the new application registration. This | |
1227 | * call is blocking so we can be assured that the data will be read | |
1228 | * at some point in time or wait to the end of the world :) | |
1229 | */ | |
1230 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1231 | sizeof(struct ust_command)); | |
1232 | if (ret < 0) { | |
1233 | perror("write apps cmd pipe"); | |
1234 | if (errno == EBADF) { | |
1235 | /* | |
1236 | * We can't inform the application thread to process | |
1237 | * registration. We will exit or else application | |
1238 | * registration will not occur and tracing will never | |
1239 | * start. | |
1240 | */ | |
1241 | goto error; | |
1242 | } | |
1243 | } | |
1244 | free(ust_cmd); | |
1245 | } while (node != NULL); | |
1246 | ||
1247 | /* Futex wait on queue. Blocking call on futex() */ | |
1248 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1249 | } | |
1250 | ||
1251 | error: | |
1252 | DBG("Dispatch thread dying"); | |
1253 | return NULL; | |
1254 | } | |
1255 | ||
1256 | /* | |
1257 | * This thread manage application registration. | |
1258 | */ | |
1259 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1260 | { |
5eb91c98 DG |
1261 | int sock = 0, i, ret, pollfd; |
1262 | uint32_t revents, nb_fd; | |
1263 | struct lttng_poll_event events; | |
099e26bd DG |
1264 | /* |
1265 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1266 | * freed in the manage apps thread. | |
1267 | */ | |
1268 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1269 | |
099e26bd | 1270 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1271 | |
1272 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1273 | if (ret < 0) { | |
1274 | goto error; | |
1275 | } | |
1276 | ||
5eb91c98 DG |
1277 | /* |
1278 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1279 | * more will be added to this poll set. | |
1280 | */ | |
1281 | ret = create_thread_poll_set(&events, 2); | |
1282 | if (ret < 0) { | |
1283 | goto error; | |
1284 | } | |
273ea72c | 1285 | |
5eb91c98 DG |
1286 | /* Add the application registration socket */ |
1287 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1288 | if (ret < 0) { | |
1289 | goto error; | |
1290 | } | |
273ea72c | 1291 | |
1d4b027a | 1292 | /* Notify all applications to register */ |
0fdd1e2c DG |
1293 | ret = notify_ust_apps(1); |
1294 | if (ret < 0) { | |
1295 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1296 | "Execution continues but there might be problem for already\n" |
1297 | "running applications that wishes to register."); | |
0fdd1e2c | 1298 | } |
1d4b027a DG |
1299 | |
1300 | while (1) { | |
1301 | DBG("Accepting application registration"); | |
273ea72c | 1302 | |
5eb91c98 DG |
1303 | nb_fd = LTTNG_POLL_GETNB(&events); |
1304 | ||
273ea72c | 1305 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 1306 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1307 | if (ret < 0) { |
273ea72c DG |
1308 | goto error; |
1309 | } | |
1310 | ||
5eb91c98 DG |
1311 | for (i = 0; i < nb_fd; i++) { |
1312 | /* Fetch once the poll data */ | |
1313 | revents = LTTNG_POLL_GETEV(&events, i); | |
1314 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1315 | |
5eb91c98 DG |
1316 | /* Thread quit pipe has been closed. Killing thread. */ |
1317 | ret = check_thread_quit_pipe(pollfd, revents); | |
1318 | if (ret) { | |
90014c57 DG |
1319 | goto error; |
1320 | } | |
1d4b027a | 1321 | |
5eb91c98 DG |
1322 | /* Event on the registration socket */ |
1323 | if (pollfd == apps_sock) { | |
1324 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1325 | ERR("Register apps socket poll error"); | |
1326 | goto error; | |
1327 | } else if (revents & LPOLLIN) { | |
1328 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1329 | if (sock < 0) { | |
1330 | goto error; | |
1331 | } | |
099e26bd | 1332 | |
5eb91c98 | 1333 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1334 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1335 | if (ust_cmd == NULL) { |
ba7f0ae5 | 1336 | perror("ust command zmalloc"); |
5eb91c98 DG |
1337 | goto error; |
1338 | } | |
1d4b027a | 1339 | |
5eb91c98 DG |
1340 | /* |
1341 | * Using message-based transmissions to ensure we don't | |
1342 | * have to deal with partially received messages. | |
1343 | */ | |
1344 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1345 | sizeof(struct ust_register_msg)); | |
1346 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1347 | if (ret < 0) { | |
1348 | perror("lttcomm_recv_unix_sock register apps"); | |
1349 | } else { | |
1350 | ERR("Wrong size received on apps register"); | |
1351 | } | |
1352 | free(ust_cmd); | |
1353 | close(sock); | |
1354 | continue; | |
1355 | } | |
099e26bd | 1356 | |
5eb91c98 | 1357 | ust_cmd->sock = sock; |
099e26bd | 1358 | |
5eb91c98 DG |
1359 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1360 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1361 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1362 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1363 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1364 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1365 | |
5eb91c98 DG |
1366 | /* |
1367 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1368 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1369 | */ |
1370 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1371 | ||
1372 | /* | |
1373 | * Wake the registration queue futex. Implicit memory | |
1374 | * barrier with the exchange in cds_wfq_enqueue. | |
1375 | */ | |
1376 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1377 | } | |
1378 | } | |
90014c57 | 1379 | } |
1d4b027a DG |
1380 | } |
1381 | ||
1382 | error: | |
0fdd1e2c DG |
1383 | DBG("UST Registration thread dying"); |
1384 | ||
1385 | /* Notify that the registration thread is gone */ | |
1386 | notify_ust_apps(0); | |
1387 | ||
1388 | close(apps_sock); | |
1389 | close(sock); | |
273ea72c | 1390 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1391 | |
5eb91c98 DG |
1392 | lttng_poll_clean(&events); |
1393 | ||
1d4b027a DG |
1394 | return NULL; |
1395 | } | |
1396 | ||
8c0faa1d | 1397 | /* |
3bd1e081 | 1398 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1399 | * exec or it will fails. |
8c0faa1d | 1400 | */ |
3bd1e081 | 1401 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1402 | { |
1403 | int ret; | |
ee0b0061 DG |
1404 | struct timespec timeout; |
1405 | ||
1406 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1407 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1408 | |
1409 | /* Setup semaphore */ | |
3bd1e081 | 1410 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1411 | if (ret < 0) { |
3bd1e081 | 1412 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1413 | goto error; |
1414 | } | |
8c0faa1d | 1415 | |
3bd1e081 MD |
1416 | ret = pthread_create(&consumer_data->thread, NULL, |
1417 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1418 | if (ret != 0) { |
3bd1e081 | 1419 | PERROR("pthread_create consumer"); |
ee0b0061 | 1420 | ret = -1; |
8c0faa1d DG |
1421 | goto error; |
1422 | } | |
1423 | ||
ee0b0061 DG |
1424 | /* Get time for sem_timedwait absolute timeout */ |
1425 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1426 | if (ret < 0) { | |
3bd1e081 | 1427 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1428 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1429 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1430 | } else { |
1431 | /* Normal timeout if the gettime was successful */ | |
1432 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1433 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1434 | } |
8c0faa1d | 1435 | |
ee0b0061 DG |
1436 | if (ret < 0) { |
1437 | if (errno == ETIMEDOUT) { | |
1438 | /* | |
1439 | * Call has timed out so we kill the kconsumerd_thread and return | |
1440 | * an error. | |
1441 | */ | |
3bd1e081 MD |
1442 | ERR("The consumer thread was never ready. Killing it"); |
1443 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1444 | if (ret < 0) { |
3bd1e081 | 1445 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1446 | } |
1447 | } else { | |
3bd1e081 | 1448 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1449 | } |
1450 | goto error; | |
1451 | } | |
1452 | ||
3bd1e081 MD |
1453 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1454 | if (consumer_data->pid == 0) { | |
712ea556 | 1455 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1456 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1457 | goto error; |
1458 | } | |
3bd1e081 | 1459 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1460 | |
8c0faa1d DG |
1461 | return 0; |
1462 | ||
1463 | error: | |
1464 | return ret; | |
1465 | } | |
1466 | ||
d9800920 | 1467 | /* |
3bd1e081 | 1468 | * Join consumer thread |
d9800920 | 1469 | */ |
3bd1e081 | 1470 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1471 | { |
1472 | void *status; | |
1473 | int ret; | |
1474 | ||
3bd1e081 MD |
1475 | if (consumer_data->pid != 0) { |
1476 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1477 | if (ret) { |
3bd1e081 | 1478 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1479 | return ret; |
1480 | } | |
3bd1e081 | 1481 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1482 | } else { |
1483 | return 0; | |
1484 | } | |
1485 | } | |
1486 | ||
8c0faa1d | 1487 | /* |
3bd1e081 | 1488 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1489 | * |
d063d709 | 1490 | * Return pid if successful else -1. |
8c0faa1d | 1491 | */ |
3bd1e081 | 1492 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1493 | { |
1494 | int ret; | |
1495 | pid_t pid; | |
94c55f17 | 1496 | const char *consumer_to_use; |
53086306 | 1497 | const char *verbosity; |
94c55f17 | 1498 | struct stat st; |
8c0faa1d | 1499 | |
3bd1e081 | 1500 | DBG("Spawning consumerd"); |
c49dc785 | 1501 | |
8c0faa1d DG |
1502 | pid = fork(); |
1503 | if (pid == 0) { | |
1504 | /* | |
3bd1e081 | 1505 | * Exec consumerd. |
8c0faa1d | 1506 | */ |
daee5345 | 1507 | if (opt_verbose_consumer) { |
53086306 DG |
1508 | verbosity = "--verbose"; |
1509 | } else { | |
1510 | verbosity = "--quiet"; | |
1511 | } | |
3bd1e081 MD |
1512 | switch (consumer_data->type) { |
1513 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1514 | /* |
c7704d57 DG |
1515 | * Find out which consumerd to execute. We will first try the |
1516 | * 64-bit path, then the sessiond's installation directory, and | |
1517 | * fallback on the 32-bit one, | |
94c55f17 | 1518 | */ |
63a799e8 AM |
1519 | DBG3("Looking for a kernel consumer at these locations:"); |
1520 | DBG3(" 1) %s", consumerd64_bin); | |
1521 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1522 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1523 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1524 | DBG3("Found location #1"); |
94c55f17 | 1525 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1526 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1527 | DBG3("Found location #2"); |
94c55f17 | 1528 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1529 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1530 | DBG3("Found location #3"); |
eb1e0bd4 | 1531 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1532 | } else { |
63a799e8 | 1533 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1534 | break; |
1535 | } | |
1536 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1537 | execl(consumer_to_use, | |
1538 | "lttng-consumerd", verbosity, "-k", | |
1539 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1540 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1541 | NULL); | |
3bd1e081 | 1542 | break; |
7753dea8 MD |
1543 | case LTTNG_CONSUMER64_UST: |
1544 | { | |
b1e0b6b6 | 1545 | char *tmpnew = NULL; |
8f4905da MD |
1546 | |
1547 | if (consumerd64_libdir[0] != '\0') { | |
1548 | char *tmp; | |
1549 | size_t tmplen; | |
1550 | ||
1551 | tmp = getenv("LD_LIBRARY_PATH"); | |
1552 | if (!tmp) { | |
1553 | tmp = ""; | |
1554 | } | |
1555 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1556 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1557 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1558 | if (!tmpnew) { | |
1559 | ret = -ENOMEM; | |
1560 | goto error; | |
1561 | } | |
1562 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1563 | strcat(tmpnew, consumerd64_libdir); | |
1564 | if (tmp[0] != '\0') { | |
1565 | strcat(tmpnew, ":"); | |
1566 | strcat(tmpnew, tmp); | |
1567 | } | |
1568 | ret = putenv(tmpnew); | |
1569 | if (ret) { | |
1570 | ret = -errno; | |
1571 | goto error; | |
1572 | } | |
1573 | } | |
94c55f17 | 1574 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1575 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1576 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1577 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1578 | NULL); | |
8f4905da MD |
1579 | if (consumerd64_libdir[0] != '\0') { |
1580 | free(tmpnew); | |
1581 | } | |
1582 | if (ret) { | |
1583 | goto error; | |
1584 | } | |
3bd1e081 | 1585 | break; |
7753dea8 MD |
1586 | } |
1587 | case LTTNG_CONSUMER32_UST: | |
1588 | { | |
937dde8e | 1589 | char *tmpnew = NULL; |
8f4905da MD |
1590 | |
1591 | if (consumerd32_libdir[0] != '\0') { | |
1592 | char *tmp; | |
1593 | size_t tmplen; | |
1594 | ||
1595 | tmp = getenv("LD_LIBRARY_PATH"); | |
1596 | if (!tmp) { | |
1597 | tmp = ""; | |
1598 | } | |
1599 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1600 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1601 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1602 | if (!tmpnew) { | |
1603 | ret = -ENOMEM; | |
1604 | goto error; | |
1605 | } | |
1606 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1607 | strcat(tmpnew, consumerd32_libdir); | |
1608 | if (tmp[0] != '\0') { | |
1609 | strcat(tmpnew, ":"); | |
1610 | strcat(tmpnew, tmp); | |
1611 | } | |
1612 | ret = putenv(tmpnew); | |
1613 | if (ret) { | |
1614 | ret = -errno; | |
1615 | goto error; | |
1616 | } | |
1617 | } | |
94c55f17 | 1618 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1619 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1620 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1621 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1622 | NULL); | |
8f4905da MD |
1623 | if (consumerd32_libdir[0] != '\0') { |
1624 | free(tmpnew); | |
1625 | } | |
1626 | if (ret) { | |
1627 | goto error; | |
1628 | } | |
7753dea8 MD |
1629 | break; |
1630 | } | |
3bd1e081 MD |
1631 | default: |
1632 | perror("unknown consumer type"); | |
1633 | exit(EXIT_FAILURE); | |
1634 | } | |
8c0faa1d DG |
1635 | if (errno != 0) { |
1636 | perror("kernel start consumer exec"); | |
1637 | } | |
1638 | exit(EXIT_FAILURE); | |
1639 | } else if (pid > 0) { | |
1640 | ret = pid; | |
8c0faa1d | 1641 | } else { |
3bd1e081 | 1642 | perror("start consumer fork"); |
8c0faa1d | 1643 | ret = -errno; |
8c0faa1d | 1644 | } |
8f4905da | 1645 | error: |
8c0faa1d DG |
1646 | return ret; |
1647 | } | |
1648 | ||
693bd40b | 1649 | /* |
3bd1e081 | 1650 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1651 | */ |
3bd1e081 | 1652 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1653 | { |
1654 | int ret; | |
1655 | ||
3bd1e081 MD |
1656 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1657 | if (consumer_data->pid != 0) { | |
1658 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1659 | goto end; |
1660 | } | |
693bd40b | 1661 | |
3bd1e081 | 1662 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1663 | if (ret < 0) { |
3bd1e081 MD |
1664 | ERR("Spawning consumerd failed"); |
1665 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1666 | goto error; |
693bd40b | 1667 | } |
c49dc785 | 1668 | |
3bd1e081 MD |
1669 | /* Setting up the consumer_data pid */ |
1670 | consumer_data->pid = ret; | |
48842b30 | 1671 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1672 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1673 | |
3bd1e081 MD |
1674 | DBG2("Spawning consumer control thread"); |
1675 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1676 | if (ret < 0) { |
3bd1e081 | 1677 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1678 | goto error; |
1679 | } | |
1680 | ||
c49dc785 | 1681 | end: |
693bd40b DG |
1682 | return 0; |
1683 | ||
1684 | error: | |
1685 | return ret; | |
1686 | } | |
1687 | ||
b73401da | 1688 | /* |
096102bd | 1689 | * Check version of the lttng-modules. |
b73401da | 1690 | */ |
096102bd | 1691 | static int validate_lttng_modules_version(void) |
b73401da | 1692 | { |
096102bd | 1693 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1694 | } |
1695 | ||
b73401da | 1696 | /* |
096102bd | 1697 | * Setup necessary data for kernel tracer action. |
b73401da | 1698 | */ |
096102bd | 1699 | static int init_kernel_tracer(void) |
b73401da DG |
1700 | { |
1701 | int ret; | |
b73401da | 1702 | |
096102bd DG |
1703 | /* Modprobe lttng kernel modules */ |
1704 | ret = modprobe_lttng_control(); | |
b73401da | 1705 | if (ret < 0) { |
b73401da DG |
1706 | goto error; |
1707 | } | |
1708 | ||
096102bd DG |
1709 | /* Open debugfs lttng */ |
1710 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1711 | if (kernel_tracer_fd < 0) { | |
1712 | DBG("Failed to open %s", module_proc_lttng); | |
1713 | ret = -1; | |
1714 | goto error_open; | |
b73401da DG |
1715 | } |
1716 | ||
096102bd DG |
1717 | /* Validate kernel version */ |
1718 | ret = validate_lttng_modules_version(); | |
b73401da | 1719 | if (ret < 0) { |
096102bd | 1720 | goto error_version; |
b73401da DG |
1721 | } |
1722 | ||
096102bd | 1723 | ret = modprobe_lttng_data(); |
b73401da | 1724 | if (ret < 0) { |
096102bd | 1725 | goto error_modules; |
8c0faa1d DG |
1726 | } |
1727 | ||
f3ed775e | 1728 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1729 | return 0; |
1730 | ||
1731 | error_version: | |
1732 | modprobe_remove_lttng_control(); | |
1733 | close(kernel_tracer_fd); | |
1734 | kernel_tracer_fd = 0; | |
1735 | return LTTCOMM_KERN_VERSION; | |
1736 | ||
1737 | error_modules: | |
1738 | close(kernel_tracer_fd); | |
1739 | ||
1740 | error_open: | |
1741 | modprobe_remove_lttng_control(); | |
b73401da DG |
1742 | |
1743 | error: | |
b73401da DG |
1744 | WARN("No kernel tracer available"); |
1745 | kernel_tracer_fd = 0; | |
096102bd | 1746 | return LTTCOMM_KERN_NA; |
f3ed775e | 1747 | } |
33a2b854 | 1748 | |
f3ed775e | 1749 | /* |
54d01ffb | 1750 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1751 | */ |
54d01ffb | 1752 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1753 | { |
f40799e8 | 1754 | int ret = 0; |
8c0faa1d | 1755 | |
3bd1e081 | 1756 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1757 | /* |
54d01ffb DG |
1758 | * Assign default kernel consumer socket if no consumer assigned to the |
1759 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1760 | * an extra security check. | |
d9800920 DG |
1761 | */ |
1762 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1763 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1764 | } |
1765 | ||
2bdd86d4 | 1766 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1767 | if (ret < 0) { |
f3ed775e DG |
1768 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1769 | goto error; | |
1770 | } | |
1d4b027a | 1771 | |
3bd1e081 | 1772 | session->consumer_fds_sent = 1; |
f3ed775e | 1773 | } |
1d4b027a DG |
1774 | |
1775 | error: | |
1776 | return ret; | |
8c0faa1d DG |
1777 | } |
1778 | ||
0177d773 DG |
1779 | /* |
1780 | * Create an UST session and add it to the session ust list. | |
1781 | */ | |
44d3bd01 | 1782 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1783 | struct lttng_domain *domain) |
0177d773 | 1784 | { |
13384287 | 1785 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1786 | int ret; |
44d3bd01 DG |
1787 | |
1788 | switch (domain->type) { | |
48842b30 | 1789 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1790 | break; |
1791 | default: | |
13384287 | 1792 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1793 | goto error; |
1794 | } | |
0177d773 DG |
1795 | |
1796 | DBG("Creating UST session"); | |
1797 | ||
a991f516 | 1798 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1799 | if (lus == NULL) { |
44d3bd01 | 1800 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1801 | goto error; |
1802 | } | |
1803 | ||
e11d277b | 1804 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1805 | session->uid, session->gid); |
0177d773 DG |
1806 | if (ret < 0) { |
1807 | if (ret != -EEXIST) { | |
1808 | ERR("Trace directory creation error"); | |
44d3bd01 | 1809 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1810 | goto error; |
1811 | } | |
1812 | } | |
1813 | ||
f6a9efaa DG |
1814 | /* The domain type dictate different actions on session creation */ |
1815 | switch (domain->type) { | |
48842b30 DG |
1816 | case LTTNG_DOMAIN_UST: |
1817 | /* No ustctl for the global UST domain */ | |
1818 | break; | |
1819 | default: | |
36dc12cc | 1820 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1821 | goto error; |
0177d773 | 1822 | } |
6df2e2c9 MD |
1823 | lus->uid = session->uid; |
1824 | lus->gid = session->gid; | |
f6a9efaa | 1825 | session->ust_session = lus; |
44d3bd01 DG |
1826 | |
1827 | return LTTCOMM_OK; | |
0177d773 DG |
1828 | |
1829 | error: | |
1830 | free(lus); | |
1831 | return ret; | |
1832 | } | |
1833 | ||
333f285e | 1834 | /* |
d063d709 | 1835 | * Create a kernel tracer session then create the default channel. |
333f285e | 1836 | */ |
6df2e2c9 | 1837 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1838 | { |
f3ed775e | 1839 | int ret; |
f3ed775e DG |
1840 | |
1841 | DBG("Creating kernel session"); | |
1842 | ||
1843 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1844 | if (ret < 0) { | |
1845 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1846 | goto error; | |
333f285e DG |
1847 | } |
1848 | ||
d9800920 | 1849 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1850 | if (kconsumer_data.cmd_sock) { |
1851 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1852 | } |
1853 | ||
e11d277b | 1854 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1855 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1856 | if (ret < 0) { |
996b65c8 | 1857 | if (ret != -EEXIST) { |
7a485870 DG |
1858 | ERR("Trace directory creation error"); |
1859 | goto error; | |
1860 | } | |
1861 | } | |
6df2e2c9 MD |
1862 | session->kernel_session->uid = session->uid; |
1863 | session->kernel_session->gid = session->gid; | |
7a485870 | 1864 | |
f3ed775e DG |
1865 | error: |
1866 | return ret; | |
333f285e DG |
1867 | } |
1868 | ||
8e0af1b4 | 1869 | /* |
c7704d57 DG |
1870 | * Check if the UID or GID match the session. Root user has access to all |
1871 | * sessions. | |
8e0af1b4 | 1872 | */ |
c7704d57 | 1873 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1874 | { |
c7704d57 | 1875 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1876 | return 0; |
1877 | } else { | |
1878 | return 1; | |
1879 | } | |
1880 | } | |
1881 | ||
1882 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1883 | { | |
1884 | unsigned int i = 0; | |
1885 | struct ltt_session *session; | |
1886 | ||
1887 | DBG("Counting number of available session for UID %d GID %d", | |
1888 | uid, gid); | |
1889 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1890 | /* | |
1891 | * Only list the sessions the user can control. | |
1892 | */ | |
1893 | if (!session_access_ok(session, uid, gid)) { | |
1894 | continue; | |
1895 | } | |
1896 | i++; | |
1897 | } | |
1898 | return i; | |
1899 | } | |
1900 | ||
6c9cc2ab DG |
1901 | /* |
1902 | * Using the session list, filled a lttng_session array to send back to the | |
1903 | * client for session listing. | |
1904 | * | |
1905 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1906 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 1907 | */ |
c7704d57 DG |
1908 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
1909 | gid_t gid) | |
6c9cc2ab | 1910 | { |
8e0af1b4 | 1911 | unsigned int i = 0; |
6c9cc2ab DG |
1912 | struct ltt_session *session; |
1913 | ||
8e0af1b4 MD |
1914 | DBG("Getting all available session for UID %d GID %d", |
1915 | uid, gid); | |
6c9cc2ab DG |
1916 | /* |
1917 | * Iterate over session list and append data after the control struct in | |
1918 | * the buffer. | |
1919 | */ | |
1920 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
1921 | /* |
1922 | * Only list the sessions the user can control. | |
1923 | */ | |
1924 | if (!session_access_ok(session, uid, gid)) { | |
1925 | continue; | |
1926 | } | |
6c9cc2ab | 1927 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 1928 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1929 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1930 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 1931 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
1932 | i++; |
1933 | } | |
1934 | } | |
1935 | ||
9f19cc17 DG |
1936 | /* |
1937 | * Fill lttng_channel array of all channels. | |
1938 | */ | |
b551a063 | 1939 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
1940 | struct lttng_channel *channels) |
1941 | { | |
1942 | int i = 0; | |
1943 | struct ltt_kernel_channel *kchan; | |
1944 | ||
1945 | DBG("Listing channels for session %s", session->name); | |
1946 | ||
b551a063 DG |
1947 | switch (domain) { |
1948 | case LTTNG_DOMAIN_KERNEL: | |
1949 | /* Kernel channels */ | |
1950 | if (session->kernel_session != NULL) { | |
1951 | cds_list_for_each_entry(kchan, | |
1952 | &session->kernel_session->channel_list.head, list) { | |
1953 | /* Copy lttng_channel struct to array */ | |
1954 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1955 | channels[i].enabled = kchan->enabled; | |
1956 | i++; | |
1957 | } | |
1958 | } | |
1959 | break; | |
1960 | case LTTNG_DOMAIN_UST: | |
1961 | { | |
bec39940 | 1962 | struct lttng_ht_iter iter; |
b551a063 DG |
1963 | struct ltt_ust_channel *uchan; |
1964 | ||
bec39940 DG |
1965 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
1966 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
1967 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
1968 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
1969 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
1970 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
1971 | channels[i].attr.switch_timer_interval = | |
1972 | uchan->attr.switch_timer_interval; | |
1973 | channels[i].attr.read_timer_interval = | |
1974 | uchan->attr.read_timer_interval; | |
aea829b3 | 1975 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
1976 | switch (uchan->attr.output) { |
1977 | case LTTNG_UST_MMAP: | |
1978 | default: | |
1979 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
1980 | break; | |
1981 | } | |
befe0905 | 1982 | i++; |
b551a063 DG |
1983 | } |
1984 | break; | |
1985 | } | |
1986 | default: | |
1987 | break; | |
1988 | } | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | * Create a list of ust global domain events. | |
1993 | */ | |
1994 | static int list_lttng_ust_global_events(char *channel_name, | |
1995 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
1996 | { | |
1997 | int i = 0, ret = 0; | |
1998 | unsigned int nb_event = 0; | |
bec39940 DG |
1999 | struct lttng_ht_iter iter; |
2000 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2001 | struct ltt_ust_channel *uchan; |
2002 | struct ltt_ust_event *uevent; | |
2003 | struct lttng_event *tmp; | |
2004 | ||
2005 | DBG("Listing UST global events for channel %s", channel_name); | |
2006 | ||
2007 | rcu_read_lock(); | |
2008 | ||
bec39940 DG |
2009 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2010 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2011 | if (node == NULL) { |
2012 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2013 | goto error; | |
b551a063 DG |
2014 | } |
2015 | ||
bec39940 | 2016 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2017 | |
bec39940 | 2018 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2019 | |
b551a063 DG |
2020 | if (nb_event == 0) { |
2021 | ret = nb_event; | |
2022 | goto error; | |
2023 | } | |
2024 | ||
2025 | DBG3("Listing UST global %d events", nb_event); | |
2026 | ||
2027 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2028 | if (tmp == NULL) { | |
2029 | ret = -LTTCOMM_FATAL; | |
2030 | goto error; | |
2031 | } | |
2032 | ||
bec39940 | 2033 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2034 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2035 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2036 | tmp[i].enabled = uevent->enabled; | |
2037 | switch (uevent->attr.instrumentation) { | |
2038 | case LTTNG_UST_TRACEPOINT: | |
2039 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2040 | break; | |
2041 | case LTTNG_UST_PROBE: | |
2042 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2043 | break; | |
2044 | case LTTNG_UST_FUNCTION: | |
2045 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2046 | break; | |
0cda4f28 | 2047 | } |
8005f29a | 2048 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2049 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2050 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2051 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2052 | break; |
8005f29a | 2053 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2054 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2055 | break; |
2056 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2057 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2058 | break; |
9f19cc17 | 2059 | } |
d7b75b30 | 2060 | i++; |
9f19cc17 DG |
2061 | } |
2062 | ||
b551a063 DG |
2063 | ret = nb_event; |
2064 | *events = tmp; | |
2065 | ||
2066 | error: | |
2067 | rcu_read_unlock(); | |
2068 | return ret; | |
9f19cc17 DG |
2069 | } |
2070 | ||
2071 | /* | |
b551a063 | 2072 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2073 | */ |
b551a063 DG |
2074 | static int list_lttng_kernel_events(char *channel_name, |
2075 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2076 | { |
b551a063 DG |
2077 | int i = 0, ret; |
2078 | unsigned int nb_event; | |
9f19cc17 | 2079 | struct ltt_kernel_event *event; |
b551a063 DG |
2080 | struct ltt_kernel_channel *kchan; |
2081 | ||
2082 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2083 | if (kchan == NULL) { | |
2084 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2085 | goto error; | |
2086 | } | |
2087 | ||
2088 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2089 | |
2090 | DBG("Listing events for channel %s", kchan->channel->name); | |
2091 | ||
b551a063 DG |
2092 | if (nb_event == 0) { |
2093 | ret = nb_event; | |
2094 | goto error; | |
2095 | } | |
2096 | ||
2097 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2098 | if (*events == NULL) { | |
2099 | ret = LTTCOMM_FATAL; | |
2100 | goto error; | |
2101 | } | |
2102 | ||
9f19cc17 DG |
2103 | /* Kernel channels */ |
2104 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2105 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2106 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2107 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2108 | switch (event->event->instrumentation) { |
2109 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2110 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2111 | break; |
2112 | case LTTNG_KERNEL_KPROBE: | |
2113 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2114 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2115 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2116 | sizeof(struct lttng_kernel_kprobe)); |
2117 | break; | |
2118 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2119 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2120 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2121 | sizeof(struct lttng_kernel_function)); |
2122 | break; | |
0133c199 | 2123 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2124 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2125 | break; |
a54bd42d | 2126 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2127 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2128 | break; |
7a3d1328 MD |
2129 | case LTTNG_KERNEL_ALL: |
2130 | assert(0); | |
2131 | break; | |
9f19cc17 DG |
2132 | } |
2133 | i++; | |
2134 | } | |
b551a063 DG |
2135 | |
2136 | return nb_event; | |
2137 | ||
2138 | error: | |
2139 | return ret; | |
9f19cc17 DG |
2140 | } |
2141 | ||
fac6795d | 2142 | /* |
54d01ffb | 2143 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2144 | */ |
54d01ffb DG |
2145 | static int cmd_disable_channel(struct ltt_session *session, |
2146 | int domain, char *channel_name) | |
fac6795d | 2147 | { |
54d01ffb | 2148 | int ret; |
78f0bacd DG |
2149 | struct ltt_ust_session *usess; |
2150 | ||
2151 | usess = session->ust_session; | |
379473d2 | 2152 | |
54d01ffb | 2153 | switch (domain) { |
78f0bacd DG |
2154 | case LTTNG_DOMAIN_KERNEL: |
2155 | { | |
2156 | ret = channel_kernel_disable(session->kernel_session, | |
2157 | channel_name); | |
2158 | if (ret != LTTCOMM_OK) { | |
2159 | goto error; | |
2160 | } | |
54d01ffb | 2161 | |
78f0bacd DG |
2162 | kernel_wait_quiescent(kernel_tracer_fd); |
2163 | break; | |
2164 | } | |
2165 | case LTTNG_DOMAIN_UST: | |
2166 | { | |
2167 | struct ltt_ust_channel *uchan; | |
bec39940 | 2168 | struct lttng_ht *chan_ht; |
78f0bacd | 2169 | |
7885e399 DG |
2170 | chan_ht = usess->domain_global.channels; |
2171 | ||
2172 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2173 | if (uchan == NULL) { |
2174 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2175 | goto error; |
78f0bacd DG |
2176 | } |
2177 | ||
7885e399 DG |
2178 | ret = channel_ust_disable(usess, domain, uchan); |
2179 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2180 | goto error; |
2181 | } | |
78f0bacd DG |
2182 | break; |
2183 | } | |
d78d6610 | 2184 | #if 0 |
78f0bacd DG |
2185 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2186 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2187 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2188 | #endif |
78f0bacd DG |
2189 | default: |
2190 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2191 | goto error; | |
20fe2104 DG |
2192 | } |
2193 | ||
54d01ffb | 2194 | ret = LTTCOMM_OK; |
d65106b1 | 2195 | |
54d01ffb DG |
2196 | error: |
2197 | return ret; | |
2198 | } | |
2199 | ||
2200 | /* | |
2201 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2202 | */ | |
44d3bd01 | 2203 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2204 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2205 | { |
2206 | int ret; | |
f6a9efaa | 2207 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2208 | struct lttng_ht *chan_ht; |
f6a9efaa | 2209 | |
5d56b5aa | 2210 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2211 | |
aea829b3 | 2212 | switch (domain) { |
44d3bd01 DG |
2213 | case LTTNG_DOMAIN_KERNEL: |
2214 | { | |
2215 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2216 | |
44d3bd01 DG |
2217 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2218 | session->kernel_session); | |
2219 | if (kchan == NULL) { | |
2220 | ret = channel_kernel_create(session->kernel_session, | |
2221 | attr, kernel_poll_pipe[1]); | |
2222 | } else { | |
2223 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2224 | } | |
2225 | ||
2226 | if (ret != LTTCOMM_OK) { | |
2227 | goto error; | |
2228 | } | |
2229 | ||
2230 | kernel_wait_quiescent(kernel_tracer_fd); | |
2231 | break; | |
2232 | } | |
f6a9efaa DG |
2233 | case LTTNG_DOMAIN_UST: |
2234 | { | |
2235 | struct ltt_ust_channel *uchan; | |
2236 | ||
7885e399 | 2237 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2238 | |
7885e399 | 2239 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2240 | if (uchan == NULL) { |
7885e399 | 2241 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2242 | } else { |
7885e399 | 2243 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2244 | } |
f6a9efaa DG |
2245 | break; |
2246 | } | |
d78d6610 | 2247 | #if 0 |
78f0bacd DG |
2248 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2249 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2250 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2251 | #endif |
44d3bd01 DG |
2252 | default: |
2253 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2254 | goto error; | |
54d01ffb DG |
2255 | } |
2256 | ||
54d01ffb DG |
2257 | error: |
2258 | return ret; | |
2259 | } | |
2260 | ||
2261 | /* | |
2262 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2263 | */ | |
2264 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2265 | char *channel_name, char *event_name) | |
2266 | { | |
2267 | int ret; | |
54d01ffb DG |
2268 | |
2269 | switch (domain) { | |
2270 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2271 | { |
2272 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2273 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2274 | |
b0a40d28 DG |
2275 | ksess = session->kernel_session; |
2276 | ||
2277 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2278 | if (kchan == NULL) { |
2279 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2280 | goto error; | |
d65106b1 DG |
2281 | } |
2282 | ||
b0a40d28 | 2283 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2284 | if (ret != LTTCOMM_OK) { |
2285 | goto error; | |
2286 | } | |
2287 | ||
2288 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2289 | break; |
2bdd86d4 MD |
2290 | } |
2291 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2292 | { |
b0a40d28 | 2293 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2294 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2295 | |
2296 | usess = session->ust_session; | |
2297 | ||
2298 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2299 | channel_name); | |
2300 | if (uchan == NULL) { | |
2301 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2302 | goto error; | |
2303 | } | |
2304 | ||
7f79d3a1 DG |
2305 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2306 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2307 | goto error; |
2308 | } | |
2309 | ||
7f79d3a1 | 2310 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2311 | channel_name); |
b0a40d28 DG |
2312 | break; |
2313 | } | |
d78d6610 | 2314 | #if 0 |
2bdd86d4 MD |
2315 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2316 | case LTTNG_DOMAIN_UST_PID: | |
2317 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2318 | #endif |
54d01ffb | 2319 | default: |
1ab1ea0b | 2320 | ret = LTTCOMM_UND; |
54d01ffb | 2321 | goto error; |
d65106b1 | 2322 | } |
26cc6b4e | 2323 | |
54d01ffb DG |
2324 | ret = LTTCOMM_OK; |
2325 | ||
2326 | error: | |
2327 | return ret; | |
2328 | } | |
2329 | ||
2330 | /* | |
2331 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2332 | */ | |
2333 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2334 | char *channel_name) | |
2335 | { | |
2336 | int ret; | |
54d01ffb DG |
2337 | |
2338 | switch (domain) { | |
2339 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2340 | { |
2341 | struct ltt_kernel_session *ksess; | |
2342 | struct ltt_kernel_channel *kchan; | |
2343 | ||
2344 | ksess = session->kernel_session; | |
2345 | ||
2346 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2347 | if (kchan == NULL) { |
2348 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2349 | goto error; | |
26cc6b4e DG |
2350 | } |
2351 | ||
9730260e | 2352 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2353 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2354 | goto error; |
26cc6b4e DG |
2355 | } |
2356 | ||
54d01ffb | 2357 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2358 | break; |
9730260e DG |
2359 | } |
2360 | case LTTNG_DOMAIN_UST: | |
2361 | { | |
2362 | struct ltt_ust_session *usess; | |
2363 | struct ltt_ust_channel *uchan; | |
2364 | ||
2365 | usess = session->ust_session; | |
2366 | ||
2367 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2368 | channel_name); | |
2369 | if (uchan == NULL) { | |
2370 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2371 | goto error; | |
2372 | } | |
2373 | ||
7f79d3a1 DG |
2374 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2375 | if (ret != 0) { | |
9730260e DG |
2376 | goto error; |
2377 | } | |
2378 | ||
7f79d3a1 | 2379 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2380 | |
2381 | break; | |
2382 | } | |
d78d6610 | 2383 | #if 0 |
9730260e DG |
2384 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2385 | case LTTNG_DOMAIN_UST_PID: | |
2386 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2387 | #endif |
54d01ffb | 2388 | default: |
1ab1ea0b | 2389 | ret = LTTCOMM_UND; |
54d01ffb | 2390 | goto error; |
26cc6b4e | 2391 | } |
e953ef25 | 2392 | |
54d01ffb | 2393 | ret = LTTCOMM_OK; |
e953ef25 | 2394 | |
54d01ffb DG |
2395 | error: |
2396 | return ret; | |
2397 | } | |
f5177a38 | 2398 | |
54d01ffb DG |
2399 | /* |
2400 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2401 | */ | |
2402 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2403 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2404 | { | |
2405 | int ret; | |
f5177a38 | 2406 | |
54d01ffb DG |
2407 | switch (domain) { |
2408 | case LTTNG_DOMAIN_KERNEL: | |
2409 | /* Add kernel context to kernel tracer */ | |
2410 | ret = context_kernel_add(session->kernel_session, ctx, | |
2411 | event_name, channel_name); | |
2412 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2413 | goto error; |
e953ef25 | 2414 | } |
2bdd86d4 MD |
2415 | break; |
2416 | case LTTNG_DOMAIN_UST: | |
2417 | { | |
55cc08a6 | 2418 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2419 | |
55cc08a6 DG |
2420 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2421 | if (ret != LTTCOMM_OK) { | |
2422 | goto error; | |
2bdd86d4 | 2423 | } |
e953ef25 | 2424 | break; |
2bdd86d4 | 2425 | } |
d78d6610 | 2426 | #if 0 |
55cc08a6 DG |
2427 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2428 | case LTTNG_DOMAIN_UST_PID: | |
2429 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2430 | #endif |
54d01ffb | 2431 | default: |
1ab1ea0b | 2432 | ret = LTTCOMM_UND; |
54d01ffb | 2433 | goto error; |
e953ef25 | 2434 | } |
950131af | 2435 | |
54d01ffb | 2436 | ret = LTTCOMM_OK; |
950131af | 2437 | |
54d01ffb DG |
2438 | error: |
2439 | return ret; | |
2440 | } | |
2441 | ||
2442 | /* | |
2443 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2444 | */ | |
2445 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2446 | char *channel_name, struct lttng_event *event) | |
2447 | { | |
2448 | int ret; | |
f6cd6b0f | 2449 | struct lttng_channel *attr; |
48842b30 | 2450 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2451 | |
2452 | switch (domain) { | |
2453 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2454 | { |
2455 | struct ltt_kernel_channel *kchan; | |
2456 | ||
54d01ffb DG |
2457 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2458 | session->kernel_session); | |
2459 | if (kchan == NULL) { | |
f6cd6b0f DG |
2460 | attr = channel_new_default_attr(domain); |
2461 | if (attr == NULL) { | |
2462 | ret = LTTCOMM_FATAL; | |
2463 | goto error; | |
2464 | } | |
2465 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2466 | ||
54d01ffb | 2467 | /* This call will notify the kernel thread */ |
44d3bd01 | 2468 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2469 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2470 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2471 | free(attr); |
f5177a38 DG |
2472 | goto error; |
2473 | } | |
ff4d74e6 | 2474 | free(attr); |
54d01ffb | 2475 | } |
950131af | 2476 | |
54d01ffb DG |
2477 | /* Get the newly created kernel channel pointer */ |
2478 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2479 | session->kernel_session); | |
2480 | if (kchan == NULL) { | |
2481 | /* This sould not happen... */ | |
2482 | ret = LTTCOMM_FATAL; | |
2483 | goto error; | |
2484 | } | |
f5177a38 | 2485 | |
48842b30 DG |
2486 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2487 | event); | |
54d01ffb | 2488 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2489 | goto error; |
950131af DG |
2490 | } |
2491 | ||
54d01ffb | 2492 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2493 | break; |
2bdd86d4 MD |
2494 | } |
2495 | case LTTNG_DOMAIN_UST: | |
2496 | { | |
aea829b3 | 2497 | struct lttng_channel *attr; |
edb67388 | 2498 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2499 | |
edb67388 | 2500 | /* Get channel from global UST domain */ |
48842b30 DG |
2501 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2502 | channel_name); | |
2503 | if (uchan == NULL) { | |
aea829b3 DG |
2504 | /* Create default channel */ |
2505 | attr = channel_new_default_attr(domain); | |
2506 | if (attr == NULL) { | |
2507 | ret = LTTCOMM_FATAL; | |
2508 | goto error; | |
2509 | } | |
596219f7 | 2510 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2511 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2512 | |
7885e399 | 2513 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2514 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2515 | free(attr); |
aea829b3 DG |
2516 | goto error; |
2517 | } | |
aea829b3 DG |
2518 | free(attr); |
2519 | ||
2520 | /* Get the newly created channel reference back */ | |
2521 | uchan = trace_ust_find_channel_by_name( | |
2522 | usess->domain_global.channels, channel_name); | |
2523 | if (uchan == NULL) { | |
2524 | /* Something is really wrong */ | |
2525 | ret = LTTCOMM_FATAL; | |
2526 | goto error; | |
2527 | } | |
48842b30 | 2528 | } |
2bdd86d4 | 2529 | |
edb67388 | 2530 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2531 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2532 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2533 | goto error; |
2bdd86d4 MD |
2534 | } |
2535 | break; | |
2536 | } | |
d78d6610 | 2537 | #if 0 |
2bdd86d4 MD |
2538 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2539 | case LTTNG_DOMAIN_UST_PID: | |
2540 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2541 | #endif |
54d01ffb | 2542 | default: |
1ab1ea0b | 2543 | ret = LTTCOMM_UND; |
54d01ffb | 2544 | goto error; |
950131af | 2545 | } |
d36b8583 | 2546 | |
54d01ffb | 2547 | ret = LTTCOMM_OK; |
d36b8583 | 2548 | |
54d01ffb DG |
2549 | error: |
2550 | return ret; | |
2551 | } | |
7d29a247 | 2552 | |
54d01ffb DG |
2553 | /* |
2554 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2555 | */ | |
2556 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2557 | char *channel_name, int event_type) |
54d01ffb DG |
2558 | { |
2559 | int ret; | |
2560 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2561 | |
54d01ffb DG |
2562 | switch (domain) { |
2563 | case LTTNG_DOMAIN_KERNEL: | |
2564 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2565 | session->kernel_session); | |
2566 | if (kchan == NULL) { | |
2567 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2568 | ret = channel_kernel_create(session->kernel_session, NULL, |
2569 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2570 | if (ret != LTTCOMM_OK) { |
2571 | goto error; | |
d36b8583 | 2572 | } |
0d0c377a | 2573 | |
8f69e5eb DG |
2574 | /* Get the newly created kernel channel pointer */ |
2575 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2576 | session->kernel_session); | |
2577 | if (kchan == NULL) { | |
2578 | /* This sould not happen... */ | |
2579 | ret = LTTCOMM_FATAL; | |
2580 | goto error; | |
2581 | } | |
2582 | ||
54d01ffb | 2583 | } |
0fdd1e2c | 2584 | |
7a3d1328 | 2585 | switch (event_type) { |
76d45b40 | 2586 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2587 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2588 | kchan, kernel_tracer_fd); |
7a3d1328 | 2589 | break; |
76d45b40 | 2590 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2591 | /* |
7a3d1328 MD |
2592 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2593 | * events already registered to the channel. | |
8c9ae521 | 2594 | */ |
7a3d1328 MD |
2595 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2596 | kchan, kernel_tracer_fd); | |
2597 | break; | |
76d45b40 | 2598 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2599 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2600 | ret = event_kernel_enable_all(session->kernel_session, |
2601 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2602 | break; |
2603 | default: | |
2604 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2605 | goto error; | |
8c9ae521 | 2606 | } |
8f69e5eb DG |
2607 | |
2608 | /* Manage return value */ | |
54d01ffb | 2609 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2610 | goto error; |
d36b8583 DG |
2611 | } |
2612 | ||
54d01ffb | 2613 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2614 | break; |
76d45b40 DG |
2615 | case LTTNG_DOMAIN_UST: |
2616 | { | |
2617 | struct lttng_channel *attr; | |
2618 | struct ltt_ust_channel *uchan; | |
2619 | struct ltt_ust_session *usess = session->ust_session; | |
2620 | ||
2621 | /* Get channel from global UST domain */ | |
2622 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2623 | channel_name); | |
2624 | if (uchan == NULL) { | |
2625 | /* Create default channel */ | |
2626 | attr = channel_new_default_attr(domain); | |
2627 | if (attr == NULL) { | |
2628 | ret = LTTCOMM_FATAL; | |
2629 | goto error; | |
2630 | } | |
2631 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2632 | attr->name[NAME_MAX - 1] = '\0'; | |
2633 | ||
2634 | /* Use the internal command enable channel */ | |
7885e399 | 2635 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2636 | if (ret != LTTCOMM_OK) { |
2637 | free(attr); | |
2638 | goto error; | |
2639 | } | |
2640 | free(attr); | |
2641 | ||
2642 | /* Get the newly created channel reference back */ | |
2643 | uchan = trace_ust_find_channel_by_name( | |
2644 | usess->domain_global.channels, channel_name); | |
2645 | if (uchan == NULL) { | |
2646 | /* Something is really wrong */ | |
2647 | ret = LTTCOMM_FATAL; | |
2648 | goto error; | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | /* At this point, the session and channel exist on the tracer */ | |
2653 | ||
2654 | switch (event_type) { | |
2655 | case LTTNG_EVENT_ALL: | |
2656 | case LTTNG_EVENT_TRACEPOINT: | |
2657 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2658 | if (ret != LTTCOMM_OK) { | |
2659 | goto error; | |
2660 | } | |
2661 | break; | |
2662 | default: | |
2663 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2664 | goto error; | |
2665 | } | |
2666 | ||
2667 | /* Manage return value */ | |
2668 | if (ret != LTTCOMM_OK) { | |
2669 | goto error; | |
2670 | } | |
2671 | ||
2672 | break; | |
2673 | } | |
d78d6610 | 2674 | #if 0 |
76d45b40 DG |
2675 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2676 | case LTTNG_DOMAIN_UST_PID: | |
2677 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2678 | #endif |
54d01ffb | 2679 | default: |
1ab1ea0b | 2680 | ret = LTTCOMM_UND; |
54d01ffb | 2681 | goto error; |
d36b8583 | 2682 | } |
f3ed775e | 2683 | |
54d01ffb DG |
2684 | ret = LTTCOMM_OK; |
2685 | ||
2686 | error: | |
2687 | return ret; | |
2688 | } | |
2689 | ||
2690 | /* | |
2691 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2692 | */ | |
2693 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2694 | { | |
2695 | int ret; | |
2696 | ssize_t nb_events = 0; | |
2697 | ||
2698 | switch (domain) { | |
2699 | case LTTNG_DOMAIN_KERNEL: | |
2700 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2701 | if (nb_events < 0) { | |
2702 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2703 | goto error; | |
894be886 | 2704 | } |
54d01ffb | 2705 | break; |
b551a063 DG |
2706 | case LTTNG_DOMAIN_UST: |
2707 | nb_events = ust_app_list_events(events); | |
2708 | if (nb_events < 0) { | |
2709 | ret = LTTCOMM_UST_LIST_FAIL; | |
2710 | goto error; | |
2711 | } | |
2712 | break; | |
54d01ffb | 2713 | default: |
1ab1ea0b | 2714 | ret = LTTCOMM_UND; |
54d01ffb DG |
2715 | goto error; |
2716 | } | |
894be886 | 2717 | |
54d01ffb | 2718 | return nb_events; |
7d29a247 | 2719 | |
54d01ffb DG |
2720 | error: |
2721 | /* Return negative value to differentiate return code */ | |
2722 | return -ret; | |
2723 | } | |
b389abbe | 2724 | |
54d01ffb DG |
2725 | /* |
2726 | * Command LTTNG_START_TRACE processed by the client thread. | |
2727 | */ | |
2728 | static int cmd_start_trace(struct ltt_session *session) | |
2729 | { | |
2730 | int ret; | |
54d01ffb | 2731 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2732 | struct ltt_ust_session *usess; |
b389abbe | 2733 | |
54d01ffb DG |
2734 | /* Short cut */ |
2735 | ksession = session->kernel_session; | |
b9d9b220 | 2736 | usess = session->ust_session; |
5eb91c98 | 2737 | |
b9ef1c83 DG |
2738 | if (session->enabled) { |
2739 | ret = LTTCOMM_UST_START_FAIL; | |
2740 | goto error; | |
2741 | } | |
2742 | ||
464dd62d MD |
2743 | session->enabled = 1; |
2744 | ||
54d01ffb DG |
2745 | /* Kernel tracing */ |
2746 | if (ksession != NULL) { | |
2bdd86d4 MD |
2747 | struct ltt_kernel_channel *kchan; |
2748 | ||
54d01ffb DG |
2749 | /* Open kernel metadata */ |
2750 | if (ksession->metadata == NULL) { | |
2751 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2752 | if (ret < 0) { | |
2753 | ret = LTTCOMM_KERN_META_FAIL; | |
2754 | goto error; | |
b389abbe | 2755 | } |
54d01ffb | 2756 | } |
7d29a247 | 2757 | |
54d01ffb DG |
2758 | /* Open kernel metadata stream */ |
2759 | if (ksession->metadata_stream_fd == 0) { | |
2760 | ret = kernel_open_metadata_stream(ksession); | |
2761 | if (ret < 0) { | |
2762 | ERR("Kernel create metadata stream failed"); | |
2763 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2764 | goto error; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | /* For each channel */ | |
2769 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2770 | if (kchan->stream_count == 0) { | |
2771 | ret = kernel_open_channel_stream(kchan); | |
2772 | if (ret < 0) { | |
2773 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2774 | goto error; |
2775 | } | |
54d01ffb DG |
2776 | /* Update the stream global counter */ |
2777 | ksession->stream_count_global += ret; | |
7d29a247 | 2778 | } |
54d01ffb DG |
2779 | } |
2780 | ||
2781 | /* Setup kernel consumer socket and send fds to it */ | |
2782 | ret = init_kernel_tracing(ksession); | |
2783 | if (ret < 0) { | |
2784 | ret = LTTCOMM_KERN_START_FAIL; | |
2785 | goto error; | |
2786 | } | |
2787 | ||
2788 | /* This start the kernel tracing */ | |
2789 | ret = kernel_start_session(ksession); | |
2790 | if (ret < 0) { | |
2791 | ret = LTTCOMM_KERN_START_FAIL; | |
2792 | goto error; | |
2793 | } | |
2794 | ||
2795 | /* Quiescent wait after starting trace */ | |
2796 | kernel_wait_quiescent(kernel_tracer_fd); | |
2797 | } | |
2798 | ||
36dc12cc | 2799 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2800 | if (usess) { |
2801 | usess->start_trace = 1; | |
36dc12cc | 2802 | |
b9d9b220 DG |
2803 | ret = ust_app_start_trace_all(usess); |
2804 | if (ret < 0) { | |
2805 | ret = LTTCOMM_UST_START_FAIL; | |
2806 | goto error; | |
2807 | } | |
2bdd86d4 | 2808 | } |
54d01ffb DG |
2809 | |
2810 | ret = LTTCOMM_OK; | |
2811 | ||
2812 | error: | |
2813 | return ret; | |
2814 | } | |
2815 | ||
2816 | /* | |
2817 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2818 | */ | |
2819 | static int cmd_stop_trace(struct ltt_session *session) | |
2820 | { | |
2821 | int ret; | |
2822 | struct ltt_kernel_channel *kchan; | |
2823 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2824 | struct ltt_ust_session *usess; |
54d01ffb DG |
2825 | |
2826 | /* Short cut */ | |
2827 | ksession = session->kernel_session; | |
8be98f9a | 2828 | usess = session->ust_session; |
54d01ffb | 2829 | |
b9ef1c83 | 2830 | if (!session->enabled) { |
190df5ac | 2831 | ret = LTTCOMM_UST_STOP_FAIL; |
b9ef1c83 DG |
2832 | goto error; |
2833 | } | |
2834 | ||
464dd62d MD |
2835 | session->enabled = 0; |
2836 | ||
54d01ffb DG |
2837 | /* Kernel tracer */ |
2838 | if (ksession != NULL) { | |
2839 | DBG("Stop kernel tracing"); | |
2840 | ||
2841 | /* Flush all buffers before stopping */ | |
2842 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2843 | if (ret < 0) { | |
2844 | ERR("Kernel metadata flush failed"); | |
2845 | } | |
f34daff7 | 2846 | |
54d01ffb DG |
2847 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2848 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2849 | if (ret < 0) { |
54d01ffb | 2850 | ERR("Kernel flush buffer error"); |
7d29a247 | 2851 | } |
54d01ffb | 2852 | } |
19e70852 | 2853 | |
54d01ffb DG |
2854 | ret = kernel_stop_session(ksession); |
2855 | if (ret < 0) { | |
2856 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2857 | goto error; |
f3ed775e | 2858 | } |
54d01ffb DG |
2859 | |
2860 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2861 | } |
54d01ffb | 2862 | |
8be98f9a MD |
2863 | if (usess) { |
2864 | usess->start_trace = 0; | |
2bdd86d4 | 2865 | |
8be98f9a | 2866 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2867 | if (ret < 0) { |
190df5ac | 2868 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2869 | goto error; |
2870 | } | |
2bdd86d4 | 2871 | } |
54d01ffb DG |
2872 | |
2873 | ret = LTTCOMM_OK; | |
2874 | ||
2875 | error: | |
2876 | return ret; | |
2877 | } | |
2878 | ||
2879 | /* | |
2880 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2881 | */ | |
a4405090 | 2882 | static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds) |
54d01ffb DG |
2883 | { |
2884 | int ret; | |
2885 | ||
a4405090 DG |
2886 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
2887 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb DG |
2888 | if (ret != LTTCOMM_OK) { |
2889 | goto error; | |
2890 | } | |
2891 | ||
2892 | ret = LTTCOMM_OK; | |
2893 | ||
2894 | error: | |
2895 | return ret; | |
2896 | } | |
2897 | ||
2898 | /* | |
2899 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2900 | */ | |
2901 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2902 | { | |
2903 | int ret; | |
2904 | ||
2905 | /* Clean kernel session teardown */ | |
2906 | teardown_kernel_session(session); | |
84cd17c6 MD |
2907 | /* UST session teardown */ |
2908 | teardown_ust_session(session); | |
54d01ffb DG |
2909 | |
2910 | /* | |
2911 | * Must notify the kernel thread here to update it's poll setin order | |
2912 | * to remove the channel(s)' fd just destroyed. | |
2913 | */ | |
2914 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2915 | if (ret < 0) { | |
2916 | perror("write kernel poll pipe"); | |
2917 | } | |
2918 | ||
271933a4 | 2919 | ret = session_destroy(session); |
54d01ffb DG |
2920 | |
2921 | return ret; | |
2922 | } | |
2923 | ||
2924 | /* | |
2925 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2926 | */ | |
2927 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2928 | { | |
2929 | int ret; | |
2930 | ||
2931 | switch (domain) { | |
2932 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2933 | { |
54d01ffb | 2934 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2935 | |
54d01ffb DG |
2936 | kcalibrate.type = calibrate->type; |
2937 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2938 | if (ret < 0) { |
54d01ffb DG |
2939 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2940 | goto error; | |
33a2b854 | 2941 | } |
54d01ffb DG |
2942 | break; |
2943 | } | |
4466912f DG |
2944 | case LTTNG_DOMAIN_UST: |
2945 | { | |
2946 | struct lttng_ust_calibrate ucalibrate; | |
2947 | ||
2948 | ucalibrate.type = calibrate->type; | |
2949 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2950 | if (ret < 0) { | |
2951 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
2952 | goto error; | |
2953 | } | |
2954 | break; | |
2955 | } | |
54d01ffb | 2956 | default: |
1ab1ea0b | 2957 | ret = LTTCOMM_UND; |
54d01ffb DG |
2958 | goto error; |
2959 | } | |
33a2b854 | 2960 | |
54d01ffb | 2961 | ret = LTTCOMM_OK; |
33a2b854 | 2962 | |
54d01ffb DG |
2963 | error: |
2964 | return ret; | |
2965 | } | |
7d29a247 | 2966 | |
54d01ffb DG |
2967 | /* |
2968 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2969 | */ | |
2970 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
2971 | char *sock_path) | |
2972 | { | |
2973 | int ret, sock; | |
b389abbe | 2974 | |
54d01ffb DG |
2975 | switch (domain) { |
2976 | case LTTNG_DOMAIN_KERNEL: | |
2977 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 2978 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
2979 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
2980 | goto error; | |
2981 | } | |
2982 | ||
2983 | sock = lttcomm_connect_unix_sock(sock_path); | |
2984 | if (sock < 0) { | |
2985 | ret = LTTCOMM_CONNECT_FAIL; | |
2986 | goto error; | |
2987 | } | |
2988 | ||
2989 | session->kernel_session->consumer_fd = sock; | |
2990 | break; | |
2991 | default: | |
2992 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 2993 | ret = LTTCOMM_UND; |
54d01ffb DG |
2994 | goto error; |
2995 | } | |
2996 | ||
2997 | ret = LTTCOMM_OK; | |
2998 | ||
2999 | error: | |
3000 | return ret; | |
3001 | } | |
3002 | ||
3003 | /* | |
3004 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3005 | */ | |
3006 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3007 | struct lttng_domain **domains) | |
3008 | { | |
b551a063 | 3009 | int ret, index = 0; |
54d01ffb DG |
3010 | ssize_t nb_dom = 0; |
3011 | ||
3012 | if (session->kernel_session != NULL) { | |
b551a063 | 3013 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3014 | nb_dom++; |
3015 | } | |
3016 | ||
b551a063 DG |
3017 | if (session->ust_session != NULL) { |
3018 | DBG3("Listing domains found UST global domain"); | |
3019 | nb_dom++; | |
3020 | } | |
54d01ffb | 3021 | |
b551a063 | 3022 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3023 | if (*domains == NULL) { |
3024 | ret = -LTTCOMM_FATAL; | |
3025 | goto error; | |
3026 | } | |
3027 | ||
b551a063 DG |
3028 | if (session->kernel_session != NULL) { |
3029 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3030 | index++; | |
3031 | } | |
3032 | ||
3033 | if (session->ust_session != NULL) { | |
3034 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3035 | index++; | |
3036 | } | |
54d01ffb | 3037 | |
54d01ffb DG |
3038 | return nb_dom; |
3039 | ||
3040 | error: | |
3041 | return ret; | |
3042 | } | |
3043 | ||
3044 | /* | |
3045 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3046 | */ | |
b551a063 | 3047 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3048 | struct lttng_channel **channels) |
3049 | { | |
3050 | int ret; | |
3051 | ssize_t nb_chan = 0; | |
3052 | ||
b551a063 DG |
3053 | switch (domain) { |
3054 | case LTTNG_DOMAIN_KERNEL: | |
3055 | if (session->kernel_session != NULL) { | |
3056 | nb_chan = session->kernel_session->channel_count; | |
3057 | } | |
0df502fd | 3058 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3059 | break; |
3060 | case LTTNG_DOMAIN_UST: | |
3061 | if (session->ust_session != NULL) { | |
bec39940 | 3062 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3063 | session->ust_session->domain_global.channels); |
3064 | } | |
0df502fd | 3065 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3066 | break; |
3067 | default: | |
3068 | *channels = NULL; | |
1ab1ea0b | 3069 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3070 | goto error; |
3071 | } | |
3072 | ||
b551a063 DG |
3073 | if (nb_chan > 0) { |
3074 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3075 | if (*channels == NULL) { | |
3076 | ret = -LTTCOMM_FATAL; | |
3077 | goto error; | |
3078 | } | |
54d01ffb | 3079 | |
b551a063 DG |
3080 | list_lttng_channels(domain, session, *channels); |
3081 | } else { | |
3082 | *channels = NULL; | |
3083 | } | |
2bdd86d4 | 3084 | |
54d01ffb DG |
3085 | return nb_chan; |
3086 | ||
3087 | error: | |
3088 | return ret; | |
3089 | } | |
3090 | ||
3091 | /* | |
3092 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3093 | */ | |
b551a063 | 3094 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3095 | char *channel_name, struct lttng_event **events) |
3096 | { | |
b551a063 | 3097 | int ret = 0; |
54d01ffb | 3098 | ssize_t nb_event = 0; |
54d01ffb | 3099 | |
b551a063 DG |
3100 | switch (domain) { |
3101 | case LTTNG_DOMAIN_KERNEL: | |
3102 | if (session->kernel_session != NULL) { | |
3103 | nb_event = list_lttng_kernel_events(channel_name, | |
3104 | session->kernel_session, events); | |
54d01ffb | 3105 | } |
b551a063 DG |
3106 | break; |
3107 | case LTTNG_DOMAIN_UST: | |
3108 | { | |
3109 | if (session->ust_session != NULL) { | |
3110 | nb_event = list_lttng_ust_global_events(channel_name, | |
3111 | &session->ust_session->domain_global, events); | |
3112 | } | |
3113 | break; | |
54d01ffb | 3114 | } |
b551a063 | 3115 | default: |
1ab1ea0b | 3116 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3117 | goto error; |
3118 | } | |
3119 | ||
b551a063 | 3120 | ret = nb_event; |
54d01ffb DG |
3121 | |
3122 | error: | |
3123 | return ret; | |
3124 | } | |
3125 | ||
3126 | /* | |
3127 | * Process the command requested by the lttng client within the command | |
3128 | * context structure. This function make sure that the return structure (llm) | |
3129 | * is set and ready for transmission before returning. | |
3130 | * | |
3131 | * Return any error encountered or 0 for success. | |
3132 | */ | |
3133 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3134 | { | |
3135 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3136 | int need_tracing_session = 1; |
54d01ffb DG |
3137 | |
3138 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3139 | ||
4fba7219 DG |
3140 | if (opt_no_kernel && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
3141 | ret = LTTCOMM_KERN_NA; | |
3142 | goto error; | |
3143 | } | |
3144 | ||
54d01ffb DG |
3145 | /* |
3146 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3147 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3148 | * command. |
3149 | */ | |
3150 | switch(cmd_ctx->lsm->cmd_type) { | |
3151 | case LTTNG_LIST_SESSIONS: | |
3152 | case LTTNG_LIST_TRACEPOINTS: | |
3153 | case LTTNG_LIST_DOMAINS: | |
3154 | case LTTNG_LIST_CHANNELS: | |
3155 | case LTTNG_LIST_EVENTS: | |
3156 | break; | |
3157 | default: | |
3158 | /* Setup lttng message with no payload */ | |
3159 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3160 | if (ret < 0) { | |
3161 | /* This label does not try to unlock the session */ | |
3162 | goto init_setup_error; | |
3163 | } | |
3164 | } | |
3165 | ||
3166 | /* Commands that DO NOT need a session. */ | |
3167 | switch (cmd_ctx->lsm->cmd_type) { | |
3168 | case LTTNG_CALIBRATE: | |
3169 | case LTTNG_CREATE_SESSION: | |
3170 | case LTTNG_LIST_SESSIONS: | |
3171 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3172 | need_tracing_session = 0; |
54d01ffb DG |
3173 | break; |
3174 | default: | |
3175 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3176 | session_lock_list(); |
54d01ffb | 3177 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3178 | session_unlock_list(); |
54d01ffb DG |
3179 | if (cmd_ctx->session == NULL) { |
3180 | if (cmd_ctx->lsm->session.name != NULL) { | |
3181 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3182 | } else { | |
3183 | /* If no session name specified */ | |
3184 | ret = LTTCOMM_SELECT_SESS; | |
3185 | } | |
3186 | goto error; | |
3187 | } else { | |
3188 | /* Acquire lock for the session */ | |
3189 | session_lock(cmd_ctx->session); | |
3190 | } | |
3191 | break; | |
3192 | } | |
b389abbe | 3193 | |
54d01ffb DG |
3194 | /* |
3195 | * Check domain type for specific "pre-action". | |
3196 | */ | |
3197 | switch (cmd_ctx->lsm->domain.type) { | |
3198 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 DG |
3199 | if (!is_root) { |
3200 | ret = LTTCOMM_KERN_NA; | |
3201 | goto error; | |
3202 | } | |
3203 | ||
54d01ffb DG |
3204 | /* Kernel tracer check */ |
3205 | if (kernel_tracer_fd == 0) { | |
3206 | /* Basically, load kernel tracer modules */ | |
096102bd DG |
3207 | ret = init_kernel_tracer(); |
3208 | if (ret != 0) { | |
54d01ffb DG |
3209 | goto error; |
3210 | } | |
3211 | } | |
5eb91c98 | 3212 | |
54d01ffb | 3213 | /* Need a session for kernel command */ |
44d3bd01 | 3214 | if (need_tracing_session) { |
54d01ffb | 3215 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3216 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3217 | if (ret < 0) { |
54d01ffb | 3218 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3219 | goto error; |
3220 | } | |
b389abbe | 3221 | } |
7d29a247 | 3222 | |
54d01ffb | 3223 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3224 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3225 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3226 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3227 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3228 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3229 | if (ret < 0) { |
54d01ffb DG |
3230 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3231 | goto error; | |
950131af | 3232 | } |
3ff2ecac MD |
3233 | } else { |
3234 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3235 | } |
0d0c377a | 3236 | } |
54d01ffb | 3237 | break; |
2bdd86d4 | 3238 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3239 | { |
44d3bd01 | 3240 | if (need_tracing_session) { |
f6a9efaa | 3241 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3242 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3243 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3244 | if (ret != LTTCOMM_OK) { |
3245 | goto error; | |
3246 | } | |
3247 | } | |
7753dea8 MD |
3248 | /* Start the UST consumer daemons */ |
3249 | /* 64-bit */ | |
3250 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3251 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3252 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3253 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3254 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3255 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3256 | if (ret < 0) { |
7753dea8 MD |
3257 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3258 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3259 | goto error; |
3260 | } | |
48842b30 | 3261 | |
7753dea8 | 3262 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3263 | } else { |
7753dea8 MD |
3264 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3265 | } | |
3266 | /* 32-bit */ | |
fc7a59ce | 3267 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3268 | ustconsumer32_data.pid == 0 && |
3269 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3270 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3271 | ret = start_consumerd(&ustconsumer32_data); | |
3272 | if (ret < 0) { | |
3273 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3274 | ust_consumerd32_fd = -EINVAL; | |
3275 | goto error; | |
3276 | } | |
3277 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3278 | } else { | |
3279 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3280 | } |
44d3bd01 DG |
3281 | } |
3282 | break; | |
48842b30 | 3283 | } |
54d01ffb | 3284 | default: |
54d01ffb DG |
3285 | break; |
3286 | } | |
33a2b854 | 3287 | |
8e0af1b4 MD |
3288 | /* |
3289 | * Check that the UID or GID match that of the tracing session. | |
3290 | * The root user can interact with all sessions. | |
3291 | */ | |
3292 | if (need_tracing_session) { | |
3293 | if (!session_access_ok(cmd_ctx->session, | |
a4405090 DG |
3294 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3295 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
3296 | ret = LTTCOMM_EPERM; |
3297 | goto error; | |
3298 | } | |
3299 | } | |
3300 | ||
54d01ffb DG |
3301 | /* Process by command type */ |
3302 | switch (cmd_ctx->lsm->cmd_type) { | |
3303 | case LTTNG_ADD_CONTEXT: | |
3304 | { | |
3305 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3306 | cmd_ctx->lsm->u.context.channel_name, | |
3307 | cmd_ctx->lsm->u.context.event_name, | |
3308 | &cmd_ctx->lsm->u.context.ctx); | |
3309 | break; | |
3310 | } | |
3311 | case LTTNG_DISABLE_CHANNEL: | |
3312 | { | |
3313 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3314 | cmd_ctx->lsm->u.disable.channel_name); | |
3315 | break; | |
3316 | } | |
3317 | case LTTNG_DISABLE_EVENT: | |
3318 | { | |
3319 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3320 | cmd_ctx->lsm->u.disable.channel_name, | |
3321 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3322 | break; |
3323 | } | |
54d01ffb DG |
3324 | case LTTNG_DISABLE_ALL_EVENT: |
3325 | { | |
2bdd86d4 | 3326 | DBG("Disabling all events"); |
54d01ffb DG |
3327 | |
3328 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3329 | cmd_ctx->lsm->u.disable.channel_name); | |
3330 | break; | |
3331 | } | |
3332 | case LTTNG_ENABLE_CHANNEL: | |
3333 | { | |
aea829b3 | 3334 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3335 | &cmd_ctx->lsm->u.channel.chan); |
3336 | break; | |
3337 | } | |
3338 | case LTTNG_ENABLE_EVENT: | |
3339 | { | |
3340 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3341 | cmd_ctx->lsm->u.enable.channel_name, | |
3342 | &cmd_ctx->lsm->u.enable.event); | |
3343 | break; | |
3344 | } | |
3345 | case LTTNG_ENABLE_ALL_EVENT: | |
3346 | { | |
2bdd86d4 | 3347 | DBG("Enabling all events"); |
54d01ffb DG |
3348 | |
3349 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3350 | cmd_ctx->lsm->u.enable.channel_name, |
3351 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3352 | break; |
3353 | } | |
052da939 | 3354 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3355 | { |
9f19cc17 | 3356 | struct lttng_event *events; |
54d01ffb | 3357 | ssize_t nb_events; |
052da939 | 3358 | |
54d01ffb DG |
3359 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3360 | if (nb_events < 0) { | |
3361 | ret = -nb_events; | |
3362 | goto error; | |
2ef84c95 DG |
3363 | } |
3364 | ||
3365 | /* | |
3366 | * Setup lttng message with payload size set to the event list size in | |
3367 | * bytes and then copy list into the llm payload. | |
3368 | */ | |
052da939 | 3369 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3370 | if (ret < 0) { |
052da939 | 3371 | free(events); |
2ef84c95 DG |
3372 | goto setup_error; |
3373 | } | |
3374 | ||
3375 | /* Copy event list into message payload */ | |
9f19cc17 | 3376 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3377 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3378 | |
9f19cc17 | 3379 | free(events); |
2ef84c95 DG |
3380 | |
3381 | ret = LTTCOMM_OK; | |
3382 | break; | |
3383 | } | |
f3ed775e | 3384 | case LTTNG_START_TRACE: |
8c0faa1d | 3385 | { |
54d01ffb | 3386 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3387 | break; |
3388 | } | |
f3ed775e | 3389 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3390 | { |
54d01ffb | 3391 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3392 | break; |
3393 | } | |
5e16da05 MD |
3394 | case LTTNG_CREATE_SESSION: |
3395 | { | |
54d01ffb | 3396 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3397 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3398 | break; |
3399 | } | |
3400 | case LTTNG_DESTROY_SESSION: | |
3401 | { | |
54d01ffb DG |
3402 | ret = cmd_destroy_session(cmd_ctx->session, |
3403 | cmd_ctx->lsm->session.name); | |
5461b305 | 3404 | break; |
5e16da05 | 3405 | } |
9f19cc17 | 3406 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3407 | { |
54d01ffb DG |
3408 | ssize_t nb_dom; |
3409 | struct lttng_domain *domains; | |
5461b305 | 3410 | |
54d01ffb DG |
3411 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3412 | if (nb_dom < 0) { | |
3413 | ret = -nb_dom; | |
3414 | goto error; | |
ce3d728c | 3415 | } |
520ff687 | 3416 | |
54d01ffb | 3417 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3418 | if (ret < 0) { |
3419 | goto setup_error; | |
520ff687 | 3420 | } |
57167058 | 3421 | |
54d01ffb DG |
3422 | /* Copy event list into message payload */ |
3423 | memcpy(cmd_ctx->llm->payload, domains, | |
3424 | nb_dom * sizeof(struct lttng_domain)); | |
3425 | ||
3426 | free(domains); | |
5e16da05 | 3427 | |
5461b305 | 3428 | ret = LTTCOMM_OK; |
5e16da05 MD |
3429 | break; |
3430 | } | |
9f19cc17 | 3431 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3432 | { |
54d01ffb DG |
3433 | size_t nb_chan; |
3434 | struct lttng_channel *channels; | |
3435 | ||
b551a063 DG |
3436 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3437 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3438 | if (nb_chan < 0) { |
3439 | ret = -nb_chan; | |
3440 | goto error; | |
5461b305 | 3441 | } |
ca95a216 | 3442 | |
54d01ffb | 3443 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3444 | if (ret < 0) { |
3445 | goto setup_error; | |
3446 | } | |
9f19cc17 | 3447 | |
54d01ffb DG |
3448 | /* Copy event list into message payload */ |
3449 | memcpy(cmd_ctx->llm->payload, channels, | |
3450 | nb_chan * sizeof(struct lttng_channel)); | |
3451 | ||
3452 | free(channels); | |
9f19cc17 DG |
3453 | |
3454 | ret = LTTCOMM_OK; | |
5461b305 | 3455 | break; |
5e16da05 | 3456 | } |
9f19cc17 | 3457 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3458 | { |
b551a063 | 3459 | ssize_t nb_event; |
684d34d2 | 3460 | struct lttng_event *events = NULL; |
9f19cc17 | 3461 | |
b551a063 | 3462 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3463 | cmd_ctx->lsm->u.list.channel_name, &events); |
3464 | if (nb_event < 0) { | |
3465 | ret = -nb_event; | |
3466 | goto error; | |
5461b305 | 3467 | } |
ca95a216 | 3468 | |
54d01ffb | 3469 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3470 | if (ret < 0) { |
3471 | goto setup_error; | |
3472 | } | |
9f19cc17 | 3473 | |
54d01ffb DG |
3474 | /* Copy event list into message payload */ |
3475 | memcpy(cmd_ctx->llm->payload, events, | |
3476 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3477 | |
54d01ffb | 3478 | free(events); |
9f19cc17 DG |
3479 | |
3480 | ret = LTTCOMM_OK; | |
5461b305 | 3481 | break; |
5e16da05 MD |
3482 | } |
3483 | case LTTNG_LIST_SESSIONS: | |
3484 | { | |
8e0af1b4 | 3485 | unsigned int nr_sessions; |
5461b305 | 3486 | |
8e0af1b4 | 3487 | session_lock_list(); |
a4405090 DG |
3488 | nr_sessions = lttng_sessions_count( |
3489 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3490 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3491 | |
8e0af1b4 | 3492 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3493 | if (ret < 0) { |
54d01ffb | 3494 | session_unlock_list(); |
5461b305 | 3495 | goto setup_error; |
e065084a | 3496 | } |
5e16da05 | 3497 | |
6c9cc2ab | 3498 | /* Filled the session array */ |
8e0af1b4 | 3499 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
a4405090 DG |
3500 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3501 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3502 | |
54d01ffb | 3503 | session_unlock_list(); |
5e16da05 | 3504 | |
5461b305 | 3505 | ret = LTTCOMM_OK; |
5e16da05 MD |
3506 | break; |
3507 | } | |
d0254c7c MD |
3508 | case LTTNG_CALIBRATE: |
3509 | { | |
54d01ffb DG |
3510 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3511 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3512 | break; |
3513 | } | |
d9800920 DG |
3514 | case LTTNG_REGISTER_CONSUMER: |
3515 | { | |
54d01ffb DG |
3516 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3517 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3518 | break; |
3519 | } | |
5e16da05 | 3520 | default: |
5e16da05 | 3521 | ret = LTTCOMM_UND; |
5461b305 | 3522 | break; |
fac6795d DG |
3523 | } |
3524 | ||
5461b305 | 3525 | error: |
5461b305 DG |
3526 | if (cmd_ctx->llm == NULL) { |
3527 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3528 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3529 | goto setup_error; |
3530 | } | |
3531 | } | |
54d01ffb | 3532 | /* Set return code */ |
5461b305 | 3533 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3534 | setup_error: |
b5541356 | 3535 | if (cmd_ctx->session) { |
54d01ffb | 3536 | session_unlock(cmd_ctx->session); |
b5541356 | 3537 | } |
54d01ffb | 3538 | init_setup_error: |
8028d920 | 3539 | return ret; |
fac6795d DG |
3540 | } |
3541 | ||
1d4b027a | 3542 | /* |
d063d709 DG |
3543 | * This thread manage all clients request using the unix client socket for |
3544 | * communication. | |
1d4b027a DG |
3545 | */ |
3546 | static void *thread_manage_clients(void *data) | |
3547 | { | |
5eb91c98 DG |
3548 | int sock = 0, ret, i, pollfd; |
3549 | uint32_t revents, nb_fd; | |
273ea72c | 3550 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3551 | struct lttng_poll_event events; |
1d4b027a DG |
3552 | |
3553 | DBG("[thread] Manage client started"); | |
3554 | ||
f6a9efaa DG |
3555 | rcu_register_thread(); |
3556 | ||
1d4b027a DG |
3557 | ret = lttcomm_listen_unix_sock(client_sock); |
3558 | if (ret < 0) { | |
3559 | goto error; | |
3560 | } | |
3561 | ||
5eb91c98 DG |
3562 | /* |
3563 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3564 | * more will be added to this poll set. | |
3565 | */ | |
3566 | ret = create_thread_poll_set(&events, 2); | |
3567 | if (ret < 0) { | |
3568 | goto error; | |
3569 | } | |
273ea72c | 3570 | |
5eb91c98 DG |
3571 | /* Add the application registration socket */ |
3572 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3573 | if (ret < 0) { | |
3574 | goto error; | |
3575 | } | |
273ea72c | 3576 | |
bbd973c2 DG |
3577 | /* |
3578 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3579 | */ |
3580 | if (opt_sig_parent) { | |
8db8d1dc | 3581 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3582 | } |
3583 | ||
3584 | while (1) { | |
1d4b027a | 3585 | DBG("Accepting client command ..."); |
273ea72c | 3586 | |
5eb91c98 DG |
3587 | nb_fd = LTTNG_POLL_GETNB(&events); |
3588 | ||
273ea72c | 3589 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 3590 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3591 | if (ret < 0) { |
273ea72c DG |
3592 | goto error; |
3593 | } | |
3594 | ||
5eb91c98 DG |
3595 | for (i = 0; i < nb_fd; i++) { |
3596 | /* Fetch once the poll data */ | |
3597 | revents = LTTNG_POLL_GETEV(&events, i); | |
3598 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3599 | ||
3600 | /* Thread quit pipe has been closed. Killing thread. */ | |
3601 | ret = check_thread_quit_pipe(pollfd, revents); | |
3602 | if (ret) { | |
3603 | goto error; | |
3604 | } | |
3605 | ||
3606 | /* Event on the registration socket */ | |
3607 | if (pollfd == client_sock) { | |
3608 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3609 | ERR("Client socket poll error"); | |
3610 | goto error; | |
3611 | } | |
3612 | } | |
3613 | } | |
3614 | ||
3615 | DBG("Wait for client response"); | |
3616 | ||
3617 | sock = lttcomm_accept_unix_sock(client_sock); | |
3618 | if (sock < 0) { | |
273ea72c | 3619 | goto error; |
273ea72c DG |
3620 | } |
3621 | ||
be040666 DG |
3622 | /* Set socket option for credentials retrieval */ |
3623 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3624 | if (ret < 0) { | |
3625 | goto error; | |
3626 | } | |
3627 | ||
5eb91c98 | 3628 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3629 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3630 | if (cmd_ctx == NULL) { |
ba7f0ae5 | 3631 | perror("zmalloc cmd_ctx"); |
1d4b027a | 3632 | goto error; |
5eb91c98 | 3633 | } |
1d4b027a | 3634 | |
5eb91c98 | 3635 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3636 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3637 | if (cmd_ctx->lsm == NULL) { |
ba7f0ae5 | 3638 | perror("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3639 | goto error; |
3640 | } | |
1d4b027a | 3641 | |
5eb91c98 DG |
3642 | cmd_ctx->llm = NULL; |
3643 | cmd_ctx->session = NULL; | |
1d4b027a | 3644 | |
5eb91c98 DG |
3645 | /* |
3646 | * Data is received from the lttng client. The struct | |
3647 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3648 | * the client. | |
3649 | */ | |
3650 | DBG("Receiving data from client ..."); | |
be040666 DG |
3651 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3652 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3653 | if (ret <= 0) { |
3654 | DBG("Nothing recv() from client... continuing"); | |
3655 | close(sock); | |
3656 | free(cmd_ctx); | |
3657 | continue; | |
3658 | } | |
1d4b027a | 3659 | |
5eb91c98 DG |
3660 | // TODO: Validate cmd_ctx including sanity check for |
3661 | // security purpose. | |
f7776ea7 | 3662 | |
f6a9efaa | 3663 | rcu_thread_online(); |
5eb91c98 DG |
3664 | /* |
3665 | * This function dispatch the work to the kernel or userspace tracer | |
3666 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3667 | * informations for the client. The command context struct contains | |
3668 | * everything this function may needs. | |
3669 | */ | |
3670 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3671 | rcu_thread_offline(); |
5eb91c98 | 3672 | if (ret < 0) { |
bbd973c2 | 3673 | /* |
5eb91c98 | 3674 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3675 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3676 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3677 | */ |
bbd973c2 | 3678 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3679 | continue; |
3680 | } | |
d6e4fca4 | 3681 | |
54d01ffb DG |
3682 | DBG("Sending response (size: %d, retcode: %s)", |
3683 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3684 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3685 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3686 | if (ret < 0) { |
3687 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3688 | } |
1d4b027a | 3689 | |
5eb91c98 | 3690 | /* End of transmission */ |
273ea72c | 3691 | close(sock); |
be040666 DG |
3692 | |
3693 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3694 | } |
3695 | ||
5eb91c98 DG |
3696 | error: |
3697 | DBG("Client thread dying"); | |
273ea72c | 3698 | unlink(client_unix_sock_path); |
5eb91c98 DG |
3699 | close(client_sock); |
3700 | close(sock); | |
273ea72c | 3701 | |
5eb91c98 | 3702 | lttng_poll_clean(&events); |
a2fb29a5 | 3703 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3704 | |
3705 | rcu_unregister_thread(); | |
1d4b027a DG |
3706 | return NULL; |
3707 | } | |
3708 | ||
3709 | ||
fac6795d DG |
3710 | /* |
3711 | * usage function on stderr | |
3712 | */ | |
3713 | static void usage(void) | |
3714 | { | |
b716ce68 | 3715 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3716 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3717 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3718 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3719 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3720 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3721 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3722 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3723 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3724 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3725 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3726 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3727 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3728 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3729 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3730 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3731 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3732 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3733 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3734 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3735 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3736 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3737 | } |
3738 | ||
3739 | /* | |
3740 | * daemon argument parsing | |
3741 | */ | |
3742 | static int parse_args(int argc, char **argv) | |
3743 | { | |
3744 | int c; | |
3745 | ||
3746 | static struct option long_options[] = { | |
3747 | { "client-sock", 1, 0, 'c' }, | |
3748 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3749 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3750 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3751 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3752 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3753 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3754 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3755 | { "consumerd32-path", 1, 0, 'u' }, | |
3756 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3757 | { "consumerd64-path", 1, 0, 't' }, | |
3758 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3759 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3760 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3761 | { "help", 0, 0, 'h' }, |
3762 | { "group", 1, 0, 'g' }, | |
3763 | { "version", 0, 0, 'V' }, | |
75462a81 | 3764 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3765 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3766 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3767 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3768 | { NULL, 0, 0, 0 } |
3769 | }; | |
3770 | ||
3771 | while (1) { | |
3772 | int option_index = 0; | |
4fba7219 | 3773 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3774 | long_options, &option_index); |
fac6795d DG |
3775 | if (c == -1) { |
3776 | break; | |
3777 | } | |
3778 | ||
3779 | switch (c) { | |
3780 | case 0: | |
3781 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3782 | if (optarg) { | |
3783 | fprintf(stderr, " with arg %s\n", optarg); | |
3784 | } | |
3785 | break; | |
b716ce68 | 3786 | case 'c': |
fac6795d DG |
3787 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3788 | break; | |
3789 | case 'a': | |
3790 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3791 | break; | |
3792 | case 'd': | |
3793 | opt_daemon = 1; | |
3794 | break; | |
3795 | case 'g': | |
fb09408a | 3796 | opt_tracing_group = optarg; |
fac6795d DG |
3797 | break; |
3798 | case 'h': | |
3799 | usage(); | |
3800 | exit(EXIT_FAILURE); | |
3801 | case 'V': | |
3802 | fprintf(stdout, "%s\n", VERSION); | |
3803 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3804 | case 'S': |
3805 | opt_sig_parent = 1; | |
3806 | break; | |
d6f42150 | 3807 | case 'E': |
3bd1e081 | 3808 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3809 | break; |
3810 | case 'C': | |
3bd1e081 MD |
3811 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3812 | break; | |
3813 | case 'F': | |
7753dea8 | 3814 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3815 | break; |
3816 | case 'D': | |
7753dea8 MD |
3817 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3818 | break; | |
3819 | case 'H': | |
3820 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3821 | break; | |
3822 | case 'G': | |
3823 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3824 | break; |
4fba7219 DG |
3825 | case 'N': |
3826 | opt_no_kernel = 1; | |
3827 | break; | |
75462a81 DG |
3828 | case 'q': |
3829 | opt_quiet = 1; | |
3830 | break; | |
3f9947db | 3831 | case 'v': |
53086306 DG |
3832 | /* Verbose level can increase using multiple -v */ |
3833 | opt_verbose += 1; | |
3f9947db | 3834 | break; |
31f73cc9 | 3835 | case 'Z': |
3bd1e081 | 3836 | opt_verbose_consumer += 1; |
31f73cc9 | 3837 | break; |
fb09408a | 3838 | case 'u': |
fc7a59ce | 3839 | consumerd32_bin= optarg; |
ebaeda94 MD |
3840 | break; |
3841 | case 'U': | |
3842 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3843 | break; |
3844 | case 't': | |
fc7a59ce | 3845 | consumerd64_bin = optarg; |
ebaeda94 MD |
3846 | break; |
3847 | case 'T': | |
3848 | consumerd64_libdir = optarg; | |
fb09408a | 3849 | break; |
fac6795d DG |
3850 | default: |
3851 | /* Unknown option or other error. | |
3852 | * Error is printed by getopt, just return */ | |
3853 | return -1; | |
3854 | } | |
3855 | } | |
3856 | ||
3857 | return 0; | |
3858 | } | |
3859 | ||
3860 | /* | |
d063d709 | 3861 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3862 | * apps_sock - The communication socket for all UST apps. |
3863 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3864 | */ |
cf3af59e | 3865 | static int init_daemon_socket(void) |
fac6795d DG |
3866 | { |
3867 | int ret = 0; | |
3868 | mode_t old_umask; | |
3869 | ||
3870 | old_umask = umask(0); | |
3871 | ||
3872 | /* Create client tool unix socket */ | |
d6f42150 DG |
3873 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3874 | if (client_sock < 0) { | |
3875 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3876 | ret = -1; |
3877 | goto end; | |
3878 | } | |
3879 | ||
3880 | /* File permission MUST be 660 */ | |
3881 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3882 | if (ret < 0) { | |
d6f42150 | 3883 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
3884 | perror("chmod"); |
3885 | goto end; | |
3886 | } | |
3887 | ||
3888 | /* Create the application unix socket */ | |
d6f42150 DG |
3889 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3890 | if (apps_sock < 0) { | |
3891 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3892 | ret = -1; |
3893 | goto end; | |
3894 | } | |
3895 | ||
d6f42150 | 3896 | /* File permission MUST be 666 */ |
54d01ffb DG |
3897 | ret = chmod(apps_unix_sock_path, |
3898 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3899 | if (ret < 0) { |
d6f42150 | 3900 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
3901 | perror("chmod"); |
3902 | goto end; | |
3903 | } | |
3904 | ||
3905 | end: | |
3906 | umask(old_umask); | |
3907 | return ret; | |
3908 | } | |
3909 | ||
3910 | /* | |
54d01ffb DG |
3911 | * Check if the global socket is available, and if a daemon is answering at the |
3912 | * other side. If yes, error is returned. | |
fac6795d | 3913 | */ |
cf3af59e | 3914 | static int check_existing_daemon(void) |
fac6795d | 3915 | { |
7d8234d9 | 3916 | /* Is there anybody out there ? */ |
099e26bd | 3917 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3918 | return -EEXIST; |
099e26bd | 3919 | } |
b09c7c76 DG |
3920 | |
3921 | return 0; | |
fac6795d DG |
3922 | } |
3923 | ||
fac6795d | 3924 | /* |
d063d709 | 3925 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3926 | * |
d063d709 | 3927 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3928 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3929 | */ |
be040666 | 3930 | static int set_permissions(char *rundir) |
fac6795d DG |
3931 | { |
3932 | int ret; | |
996b65c8 | 3933 | gid_t gid; |
fac6795d | 3934 | |
996b65c8 MD |
3935 | gid = allowed_group(); |
3936 | if (gid < 0) { | |
be040666 DG |
3937 | WARN("No tracing group detected"); |
3938 | ret = 0; | |
fac6795d DG |
3939 | goto end; |
3940 | } | |
3941 | ||
d6f42150 | 3942 | /* Set lttng run dir */ |
be040666 | 3943 | ret = chown(rundir, 0, gid); |
d6f42150 | 3944 | if (ret < 0) { |
be040666 | 3945 | ERR("Unable to set group on %s", rundir); |
d6f42150 DG |
3946 | perror("chown"); |
3947 | } | |
3948 | ||
d1613cf5 JN |
3949 | /* Ensure tracing group can search the run dir */ |
3950 | ret = chmod(rundir, S_IRWXU | S_IXGRP); | |
3951 | if (ret < 0) { | |
3952 | ERR("Unable to set permissions on %s", rundir); | |
3953 | perror("chmod"); | |
3954 | } | |
3955 | ||
d6f42150 | 3956 | /* lttng client socket path */ |
996b65c8 | 3957 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3958 | if (ret < 0) { |
d6f42150 DG |
3959 | ERR("Unable to set group on %s", client_unix_sock_path); |
3960 | perror("chown"); | |
3961 | } | |
3962 | ||
3bd1e081 MD |
3963 | /* kconsumer error socket path */ |
3964 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3965 | if (ret < 0) { |
3bd1e081 MD |
3966 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
3967 | perror("chown"); | |
3968 | } | |
3969 | ||
7753dea8 MD |
3970 | /* 64-bit ustconsumer error socket path */ |
3971 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3972 | if (ret < 0) { | |
3973 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
3974 | perror("chown"); | |
3975 | } | |
3976 | ||
3977 | /* 32-bit ustconsumer compat32 error socket path */ | |
3978 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3979 | if (ret < 0) { |
7753dea8 | 3980 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
fac6795d DG |
3981 | perror("chown"); |
3982 | } | |
3983 | ||
d6f42150 | 3984 | DBG("All permissions are set"); |
e07ae692 | 3985 | |
fac6795d DG |
3986 | end: |
3987 | return ret; | |
3988 | } | |
3989 | ||
7a485870 | 3990 | /* |
d063d709 | 3991 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
3992 | */ |
3993 | static int create_kernel_poll_pipe(void) | |
3994 | { | |
a4405090 DG |
3995 | int ret, i; |
3996 | ||
3997 | ret = pipe(kernel_poll_pipe); | |
3998 | if (ret < 0) { | |
3999 | PERROR("kernel poll pipe"); | |
4000 | goto error; | |
4001 | } | |
4002 | ||
4003 | for (i = 0; i < 2; i++) { | |
4004 | ret = fcntl(kernel_poll_pipe[i], F_SETFD, FD_CLOEXEC); | |
4005 | if (ret < 0) { | |
4006 | PERROR("fcntl kernel_poll_pipe"); | |
4007 | goto error; | |
4008 | } | |
4009 | } | |
4010 | ||
4011 | error: | |
4012 | return ret; | |
7a485870 DG |
4013 | } |
4014 | ||
099e26bd DG |
4015 | /* |
4016 | * Create the application command pipe to wake thread_manage_apps. | |
4017 | */ | |
4018 | static int create_apps_cmd_pipe(void) | |
4019 | { | |
a4405090 DG |
4020 | int ret, i; |
4021 | ||
4022 | ret = pipe(apps_cmd_pipe); | |
4023 | if (ret < 0) { | |
4024 | PERROR("apps cmd pipe"); | |
4025 | goto error; | |
4026 | } | |
4027 | ||
4028 | for (i = 0; i < 2; i++) { | |
4029 | ret = fcntl(apps_cmd_pipe[i], F_SETFD, FD_CLOEXEC); | |
4030 | if (ret < 0) { | |
4031 | PERROR("fcntl apps_cmd_pipe"); | |
4032 | goto error; | |
4033 | } | |
4034 | } | |
4035 | ||
4036 | error: | |
4037 | return ret; | |
099e26bd DG |
4038 | } |
4039 | ||
d6f42150 | 4040 | /* |
d063d709 | 4041 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4042 | */ |
67e40797 | 4043 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4044 | { |
4045 | int ret; | |
4046 | ||
67e40797 DG |
4047 | DBG3("Creating LTTng run directory: %s", rundir); |
4048 | ||
d1613cf5 | 4049 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4050 | if (ret < 0) { |
b1f11e69 | 4051 | if (errno != EEXIST) { |
67e40797 | 4052 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4053 | goto error; |
4054 | } else { | |
4055 | ret = 0; | |
4056 | } | |
d6f42150 DG |
4057 | } |
4058 | ||
4059 | error: | |
4060 | return ret; | |
4061 | } | |
4062 | ||
4063 | /* | |
d063d709 DG |
4064 | * Setup sockets and directory needed by the kconsumerd communication with the |
4065 | * session daemon. | |
d6f42150 | 4066 | */ |
67e40797 DG |
4067 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4068 | const char *rundir) | |
d6f42150 DG |
4069 | { |
4070 | int ret; | |
67e40797 | 4071 | char path[PATH_MAX]; |
d6f42150 | 4072 | |
67e40797 | 4073 | switch (consumer_data->type) { |
7753dea8 | 4074 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4075 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4076 | break; |
4077 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4078 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4079 | break; |
4080 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4081 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4082 | break; |
4083 | default: | |
4084 | ERR("Consumer type unknown"); | |
4085 | ret = -EINVAL; | |
4086 | goto error; | |
d6f42150 DG |
4087 | } |
4088 | ||
67e40797 DG |
4089 | DBG2("Creating consumer directory: %s", path); |
4090 | ||
d1613cf5 | 4091 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4092 | if (ret < 0) { |
6beb2242 | 4093 | if (errno != EEXIST) { |
3bd1e081 | 4094 | ERR("Failed to create %s", path); |
6beb2242 DG |
4095 | goto error; |
4096 | } | |
4097 | ret = 0; | |
d6f42150 DG |
4098 | } |
4099 | ||
4100 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4101 | consumer_data->err_sock = |
4102 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4103 | if (consumer_data->err_sock < 0) { | |
4104 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4105 | ret = -1; |
4106 | goto error; | |
4107 | } | |
4108 | ||
4109 | /* File permission MUST be 660 */ | |
3bd1e081 | 4110 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4111 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4112 | if (ret < 0) { |
3bd1e081 | 4113 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4114 | PERROR("chmod"); |
d6f42150 DG |
4115 | goto error; |
4116 | } | |
4117 | ||
4118 | error: | |
4119 | return ret; | |
4120 | } | |
4121 | ||
fac6795d | 4122 | /* |
d063d709 | 4123 | * Signal handler for the daemon |
cf3af59e | 4124 | * |
54d01ffb DG |
4125 | * Simply stop all worker threads, leaving main() return gracefully after |
4126 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4127 | */ |
4128 | static void sighandler(int sig) | |
4129 | { | |
4130 | switch (sig) { | |
cf3af59e | 4131 | case SIGPIPE: |
af87c45a | 4132 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4133 | return; |
4134 | case SIGINT: | |
af87c45a | 4135 | DBG("SIGINT caught"); |
cf3af59e MD |
4136 | stop_threads(); |
4137 | break; | |
4138 | case SIGTERM: | |
af87c45a | 4139 | DBG("SIGTERM caught"); |
cf3af59e MD |
4140 | stop_threads(); |
4141 | break; | |
4142 | default: | |
4143 | break; | |
fac6795d | 4144 | } |
fac6795d DG |
4145 | } |
4146 | ||
4147 | /* | |
d063d709 | 4148 | * Setup signal handler for : |
1d4b027a | 4149 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4150 | */ |
1d4b027a | 4151 | static int set_signal_handler(void) |
fac6795d | 4152 | { |
1d4b027a DG |
4153 | int ret = 0; |
4154 | struct sigaction sa; | |
4155 | sigset_t sigset; | |
fac6795d | 4156 | |
1d4b027a DG |
4157 | if ((ret = sigemptyset(&sigset)) < 0) { |
4158 | perror("sigemptyset"); | |
4159 | return ret; | |
4160 | } | |
d6f42150 | 4161 | |
1d4b027a DG |
4162 | sa.sa_handler = sighandler; |
4163 | sa.sa_mask = sigset; | |
4164 | sa.sa_flags = 0; | |
4165 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
4166 | perror("sigaction"); | |
4167 | return ret; | |
d6f42150 DG |
4168 | } |
4169 | ||
1d4b027a DG |
4170 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
4171 | perror("sigaction"); | |
4172 | return ret; | |
d6f42150 | 4173 | } |
aaf26714 | 4174 | |
1d4b027a DG |
4175 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
4176 | perror("sigaction"); | |
4177 | return ret; | |
8c0faa1d DG |
4178 | } |
4179 | ||
1d4b027a DG |
4180 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4181 | ||
4182 | return ret; | |
fac6795d DG |
4183 | } |
4184 | ||
f3ed775e | 4185 | /* |
d063d709 DG |
4186 | * Set open files limit to unlimited. This daemon can open a large number of |
4187 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4188 | */ |
4189 | static void set_ulimit(void) | |
4190 | { | |
4191 | int ret; | |
4192 | struct rlimit lim; | |
4193 | ||
a88df331 | 4194 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4195 | lim.rlim_cur = 65535; |
4196 | lim.rlim_max = 65535; | |
4197 | ||
4198 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4199 | if (ret < 0) { | |
4200 | perror("failed to set open files limit"); | |
4201 | } | |
4202 | } | |
4203 | ||
fac6795d DG |
4204 | /* |
4205 | * main | |
4206 | */ | |
4207 | int main(int argc, char **argv) | |
4208 | { | |
fac6795d DG |
4209 | int ret = 0; |
4210 | void *status; | |
b082db07 | 4211 | const char *home_path; |
fac6795d | 4212 | |
335a95b7 MD |
4213 | init_kernel_workarounds(); |
4214 | ||
f6a9efaa DG |
4215 | rcu_register_thread(); |
4216 | ||
273ea72c | 4217 | /* Create thread quit pipe */ |
cf3af59e MD |
4218 | if ((ret = init_thread_quit_pipe()) < 0) { |
4219 | goto error; | |
273ea72c DG |
4220 | } |
4221 | ||
7753dea8 | 4222 | setup_consumerd_path(); |
fb09408a | 4223 | |
fac6795d DG |
4224 | /* Parse arguments */ |
4225 | progname = argv[0]; | |
4226 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4227 | goto error; |
fac6795d DG |
4228 | } |
4229 | ||
4230 | /* Daemonize */ | |
4231 | if (opt_daemon) { | |
53094c05 DG |
4232 | ret = daemon(0, 0); |
4233 | if (ret < 0) { | |
4234 | perror("daemon"); | |
cf3af59e | 4235 | goto error; |
53094c05 | 4236 | } |
fac6795d DG |
4237 | } |
4238 | ||
4239 | /* Check if daemon is UID = 0 */ | |
4240 | is_root = !getuid(); | |
4241 | ||
fac6795d | 4242 | if (is_root) { |
990570ed | 4243 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4244 | |
4245 | /* Create global run dir with root access */ | |
4246 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4247 | if (ret < 0) { |
cf3af59e | 4248 | goto error; |
d6f42150 DG |
4249 | } |
4250 | ||
fac6795d | 4251 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4252 | snprintf(apps_unix_sock_path, PATH_MAX, |
4253 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4254 | } |
4255 | ||
4256 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4257 | snprintf(client_unix_sock_path, PATH_MAX, |
4258 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4259 | } | |
0fdd1e2c DG |
4260 | |
4261 | /* Set global SHM for ust */ | |
4262 | if (strlen(wait_shm_path) == 0) { | |
4263 | snprintf(wait_shm_path, PATH_MAX, | |
4264 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4265 | } | |
67e40797 DG |
4266 | |
4267 | /* Setup kernel consumerd path */ | |
4268 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4269 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4270 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4271 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4272 | |
4273 | DBG2("Kernel consumer err path: %s", | |
4274 | kconsumer_data.err_unix_sock_path); | |
4275 | DBG2("Kernel consumer cmd path: %s", | |
4276 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4277 | } else { |
b082db07 DG |
4278 | home_path = get_home_dir(); |
4279 | if (home_path == NULL) { | |
273ea72c DG |
4280 | /* TODO: Add --socket PATH option */ |
4281 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4282 | ret = -EPERM; |
4283 | goto error; | |
b082db07 DG |
4284 | } |
4285 | ||
67e40797 DG |
4286 | /* |
4287 | * Create rundir from home path. This will create something like | |
4288 | * $HOME/.lttng | |
4289 | */ | |
990570ed | 4290 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4291 | if (ret < 0) { |
4292 | ret = -ENOMEM; | |
4293 | goto error; | |
4294 | } | |
4295 | ||
4296 | ret = create_lttng_rundir(rundir); | |
4297 | if (ret < 0) { | |
4298 | goto error; | |
4299 | } | |
4300 | ||
fac6795d | 4301 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4302 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4303 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4304 | } |
4305 | ||
4306 | /* Set the cli tool unix socket path */ | |
4307 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4308 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4309 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4310 | } |
0fdd1e2c DG |
4311 | |
4312 | /* Set global SHM for ust */ | |
4313 | if (strlen(wait_shm_path) == 0) { | |
4314 | snprintf(wait_shm_path, PATH_MAX, | |
4315 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4316 | } | |
fac6795d DG |
4317 | } |
4318 | ||
847177cd DG |
4319 | DBG("Client socket path %s", client_unix_sock_path); |
4320 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4321 | DBG("LTTng run directory path: %s", rundir); |
4322 | ||
4323 | /* 32 bits consumerd path setup */ | |
4324 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4325 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4326 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4327 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4328 | |
4329 | DBG2("UST consumer 32 bits err path: %s", | |
4330 | ustconsumer32_data.err_unix_sock_path); | |
4331 | DBG2("UST consumer 32 bits cmd path: %s", | |
4332 | ustconsumer32_data.cmd_unix_sock_path); | |
4333 | ||
4334 | /* 64 bits consumerd path setup */ | |
4335 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4336 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4337 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4338 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4339 | |
4340 | DBG2("UST consumer 64 bits err path: %s", | |
4341 | ustconsumer64_data.err_unix_sock_path); | |
4342 | DBG2("UST consumer 64 bits cmd path: %s", | |
4343 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4344 | |
273ea72c | 4345 | /* |
7d8234d9 | 4346 | * See if daemon already exist. |
fac6795d | 4347 | */ |
7d8234d9 | 4348 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4349 | ERR("Already running daemon.\n"); |
273ea72c | 4350 | /* |
cf3af59e MD |
4351 | * We do not goto exit because we must not cleanup() |
4352 | * because a daemon is already running. | |
ab118b20 | 4353 | */ |
cf3af59e | 4354 | goto error; |
a88df331 DG |
4355 | } |
4356 | ||
54d01ffb | 4357 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4358 | |
4359 | /* | |
4360 | * These actions must be executed as root. We do that *after* setting up | |
4361 | * the sockets path because we MUST make the check for another daemon using | |
4362 | * those paths *before* trying to set the kernel consumer sockets and init | |
4363 | * kernel tracer. | |
4364 | */ | |
4365 | if (is_root) { | |
67e40797 | 4366 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4367 | if (ret < 0) { |
4368 | goto exit; | |
4369 | } | |
4370 | ||
a88df331 | 4371 | /* Setup kernel tracer */ |
4fba7219 DG |
4372 | if (!opt_no_kernel) { |
4373 | init_kernel_tracer(); | |
4374 | } | |
a88df331 DG |
4375 | |
4376 | /* Set ulimit for open files */ | |
4377 | set_ulimit(); | |
fac6795d DG |
4378 | } |
4379 | ||
67e40797 DG |
4380 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4381 | if (ret < 0) { | |
4382 | goto exit; | |
4383 | } | |
4384 | ||
4385 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4386 | if (ret < 0) { | |
4387 | goto exit; | |
4388 | } | |
4389 | ||
cf3af59e MD |
4390 | if ((ret = set_signal_handler()) < 0) { |
4391 | goto exit; | |
fac6795d DG |
4392 | } |
4393 | ||
d6f42150 | 4394 | /* Setup the needed unix socket */ |
cf3af59e MD |
4395 | if ((ret = init_daemon_socket()) < 0) { |
4396 | goto exit; | |
fac6795d DG |
4397 | } |
4398 | ||
4399 | /* Set credentials to socket */ | |
be040666 | 4400 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4401 | goto exit; |
fac6795d DG |
4402 | } |
4403 | ||
5b8719f5 DG |
4404 | /* Get parent pid if -S, --sig-parent is specified. */ |
4405 | if (opt_sig_parent) { | |
4406 | ppid = getppid(); | |
4407 | } | |
4408 | ||
7a485870 | 4409 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4410 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4411 | goto exit; | |
7a485870 DG |
4412 | } |
4413 | ||
099e26bd DG |
4414 | /* Setup the thread apps communication pipe. */ |
4415 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4416 | goto exit; | |
4417 | } | |
4418 | ||
4419 | /* Init UST command queue. */ | |
4420 | cds_wfq_init(&ust_cmd_queue.queue); | |
4421 | ||
f6a9efaa DG |
4422 | /* Init UST app hash table */ |
4423 | ust_app_ht_alloc(); | |
4424 | ||
273ea72c | 4425 | /* |
54d01ffb DG |
4426 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4427 | * statically declared in session.c | |
273ea72c | 4428 | */ |
54d01ffb | 4429 | session_list_ptr = session_get_list(); |
b5541356 | 4430 | |
5eb91c98 DG |
4431 | /* Set up max poll set size */ |
4432 | lttng_poll_set_max_size(); | |
4433 | ||
cf3af59e | 4434 | /* Create thread to manage the client socket */ |
099e26bd DG |
4435 | ret = pthread_create(&client_thread, NULL, |
4436 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4437 | if (ret != 0) { |
099e26bd | 4438 | perror("pthread_create clients"); |
cf3af59e MD |
4439 | goto exit_client; |
4440 | } | |
fac6795d | 4441 | |
099e26bd DG |
4442 | /* Create thread to dispatch registration */ |
4443 | ret = pthread_create(&dispatch_thread, NULL, | |
4444 | thread_dispatch_ust_registration, (void *) NULL); | |
4445 | if (ret != 0) { | |
4446 | perror("pthread_create dispatch"); | |
4447 | goto exit_dispatch; | |
4448 | } | |
4449 | ||
4450 | /* Create thread to manage application registration. */ | |
4451 | ret = pthread_create(®_apps_thread, NULL, | |
4452 | thread_registration_apps, (void *) NULL); | |
4453 | if (ret != 0) { | |
4454 | perror("pthread_create registration"); | |
4455 | goto exit_reg_apps; | |
4456 | } | |
4457 | ||
cf3af59e | 4458 | /* Create thread to manage application socket */ |
54d01ffb DG |
4459 | ret = pthread_create(&apps_thread, NULL, |
4460 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4461 | if (ret != 0) { |
099e26bd | 4462 | perror("pthread_create apps"); |
cf3af59e MD |
4463 | goto exit_apps; |
4464 | } | |
fac6795d | 4465 | |
cf3af59e | 4466 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4467 | ret = pthread_create(&kernel_thread, NULL, |
4468 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4469 | if (ret != 0) { |
099e26bd | 4470 | perror("pthread_create kernel"); |
cf3af59e MD |
4471 | goto exit_kernel; |
4472 | } | |
7a485870 | 4473 | |
cf3af59e MD |
4474 | ret = pthread_join(kernel_thread, &status); |
4475 | if (ret != 0) { | |
4476 | perror("pthread_join"); | |
4477 | goto error; /* join error, exit without cleanup */ | |
fac6795d DG |
4478 | } |
4479 | ||
cf3af59e MD |
4480 | exit_kernel: |
4481 | ret = pthread_join(apps_thread, &status); | |
4482 | if (ret != 0) { | |
4483 | perror("pthread_join"); | |
4484 | goto error; /* join error, exit without cleanup */ | |
4485 | } | |
fac6795d | 4486 | |
cf3af59e | 4487 | exit_apps: |
099e26bd DG |
4488 | ret = pthread_join(reg_apps_thread, &status); |
4489 | if (ret != 0) { | |
4490 | perror("pthread_join"); | |
4491 | goto error; /* join error, exit without cleanup */ | |
4492 | } | |
4493 | ||
4494 | exit_reg_apps: | |
4495 | ret = pthread_join(dispatch_thread, &status); | |
4496 | if (ret != 0) { | |
4497 | perror("pthread_join"); | |
4498 | goto error; /* join error, exit without cleanup */ | |
4499 | } | |
4500 | ||
4501 | exit_dispatch: | |
cf3af59e MD |
4502 | ret = pthread_join(client_thread, &status); |
4503 | if (ret != 0) { | |
4504 | perror("pthread_join"); | |
4505 | goto error; /* join error, exit without cleanup */ | |
4506 | } | |
4507 | ||
3bd1e081 | 4508 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4509 | if (ret != 0) { |
3bd1e081 | 4510 | perror("join_consumer"); |
cf3af59e MD |
4511 | goto error; /* join error, exit without cleanup */ |
4512 | } | |
a88df331 | 4513 | |
cf3af59e | 4514 | exit_client: |
a88df331 | 4515 | exit: |
cf3af59e MD |
4516 | /* |
4517 | * cleanup() is called when no other thread is running. | |
4518 | */ | |
f6a9efaa | 4519 | rcu_thread_online(); |
cf3af59e | 4520 | cleanup(); |
f6a9efaa DG |
4521 | rcu_thread_offline(); |
4522 | rcu_unregister_thread(); | |
67e40797 | 4523 | if (!ret) { |
cf3af59e | 4524 | exit(EXIT_SUCCESS); |
67e40797 | 4525 | } |
cf3af59e | 4526 | error: |
5e16da05 | 4527 | exit(EXIT_FAILURE); |
fac6795d | 4528 | } |