Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
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> |
d27c42b8 | 42 | #include <common/compat/socket.h> |
db758600 DG |
43 | #include <common/defaults.h> |
44 | #include <common/kernel-consumer/kernel-consumer.h> | |
45 | #include <common/ust-consumer/ust-consumer.h> | |
fac6795d | 46 | |
10a8a223 | 47 | #include "lttng-sessiond.h" |
54d01ffb | 48 | #include "channel.h" |
099e26bd | 49 | #include "context.h" |
54d01ffb | 50 | #include "event.h" |
099e26bd | 51 | #include "futex.h" |
4771f025 | 52 | #include "kernel.h" |
096102bd | 53 | #include "modprobe.h" |
0fdd1e2c | 54 | #include "shm.h" |
1e307fab | 55 | #include "ust-ctl.h" |
8e68d1c8 | 56 | #include "utils.h" |
fac6795d | 57 | |
ebaeda94 MD |
58 | #define CONSUMERD_FILE "lttng-consumerd" |
59 | ||
3bd1e081 MD |
60 | struct consumer_data { |
61 | enum lttng_consumer_type type; | |
62 | ||
63 | pthread_t thread; /* Worker thread interacting with the consumer */ | |
64 | sem_t sem; | |
65 | ||
66 | /* Mutex to control consumerd pid assignation */ | |
67 | pthread_mutex_t pid_mutex; | |
68 | pid_t pid; | |
69 | ||
70 | int err_sock; | |
71 | int cmd_sock; | |
72 | ||
73 | /* consumer error and command Unix socket path */ | |
74 | char err_unix_sock_path[PATH_MAX]; | |
75 | char cmd_unix_sock_path[PATH_MAX]; | |
76 | }; | |
77 | ||
75462a81 | 78 | /* Const values */ |
686204ab | 79 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 80 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
81 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
82 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
83 | ||
fac6795d | 84 | /* Variables */ |
1d4b027a | 85 | int opt_verbose; /* Not static for lttngerr.h */ |
3bd1e081 | 86 | int opt_verbose_consumer; /* Not static for lttngerr.h */ |
1d4b027a | 87 | int opt_quiet; /* Not static for lttngerr.h */ |
d063d709 | 88 | |
fac6795d DG |
89 | const char *progname; |
90 | const char *opt_tracing_group; | |
5b8719f5 | 91 | static int opt_sig_parent; |
fac6795d | 92 | static int opt_daemon; |
4fba7219 | 93 | static int opt_no_kernel; |
fac6795d | 94 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 95 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 96 | static char *rundir; |
3bd1e081 MD |
97 | |
98 | /* Consumer daemon specific control data */ | |
99 | static struct consumer_data kconsumer_data = { | |
100 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
101 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
102 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
3bd1e081 | 103 | }; |
7753dea8 MD |
104 | static struct consumer_data ustconsumer64_data = { |
105 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
106 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
107 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
7753dea8 MD |
108 | }; |
109 | static struct consumer_data ustconsumer32_data = { | |
110 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
111 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
112 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
3bd1e081 MD |
113 | }; |
114 | ||
099e26bd | 115 | static int dispatch_thread_exit; |
fac6795d | 116 | |
54d01ffb DG |
117 | /* Global application Unix socket path */ |
118 | static char apps_unix_sock_path[PATH_MAX]; | |
119 | /* Global client Unix socket path */ | |
120 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
121 | /* global wait shm path for UST */ |
122 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 123 | |
1d4b027a | 124 | /* Sockets and FDs */ |
d6f42150 DG |
125 | static int client_sock; |
126 | static int apps_sock; | |
20fe2104 | 127 | static int kernel_tracer_fd; |
7a485870 | 128 | static int kernel_poll_pipe[2]; |
1d4b027a | 129 | |
273ea72c DG |
130 | /* |
131 | * Quit pipe for all threads. This permits a single cancellation point | |
132 | * for all threads when receiving an event on the pipe. | |
133 | */ | |
134 | static int thread_quit_pipe[2]; | |
135 | ||
099e26bd DG |
136 | /* |
137 | * This pipe is used to inform the thread managing application communication | |
138 | * that a command is queued and ready to be processed. | |
139 | */ | |
140 | static int apps_cmd_pipe[2]; | |
141 | ||
1d4b027a | 142 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 143 | static pthread_t apps_thread; |
099e26bd | 144 | static pthread_t reg_apps_thread; |
1d4b027a | 145 | static pthread_t client_thread; |
7a485870 | 146 | static pthread_t kernel_thread; |
099e26bd | 147 | static pthread_t dispatch_thread; |
5eb91c98 | 148 | |
fac6795d | 149 | |
099e26bd DG |
150 | /* |
151 | * UST registration command queue. This queue is tied with a futex and uses a N | |
152 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
153 | * | |
154 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
155 | * this queue and the wait/wake scheme. | |
156 | */ | |
157 | static struct ust_cmd_queue ust_cmd_queue; | |
158 | ||
b5541356 DG |
159 | /* |
160 | * Pointer initialized before thread creation. | |
161 | * | |
162 | * This points to the tracing session list containing the session count and a | |
163 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
164 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 165 | * |
d063d709 | 166 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 167 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
168 | */ |
169 | static struct ltt_session_list *session_list_ptr; | |
170 | ||
7753dea8 MD |
171 | int ust_consumerd64_fd = -1; |
172 | int ust_consumerd32_fd = -1; | |
173 | ||
fb6f1fa2 YB |
174 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
175 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
176 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
177 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a MD |
178 | |
179 | static | |
7753dea8 | 180 | void setup_consumerd_path(void) |
fb09408a | 181 | { |
fc7a59ce | 182 | const char *bin, *libdir; |
fb09408a | 183 | |
7753dea8 MD |
184 | /* |
185 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
186 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
187 | * has not been defined. | |
7753dea8 | 188 | */ |
ebaeda94 | 189 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
190 | if (!consumerd32_bin[0]) { |
191 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
192 | } |
193 | if (!consumerd32_libdir[0]) { | |
194 | consumerd32_libdir = INSTALL_LIB_PATH; | |
195 | } | |
196 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
197 | if (!consumerd64_bin[0]) { |
198 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 199 | } |
ebaeda94 MD |
200 | if (!consumerd64_libdir[0]) { |
201 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
202 | } |
203 | #else | |
204 | #error "Unknown bitness" | |
205 | #endif | |
206 | ||
fb09408a MD |
207 | /* |
208 | * runtime env. var. overrides the build default. | |
209 | */ | |
fc7a59ce AM |
210 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
211 | if (bin) { | |
212 | consumerd32_bin = bin; | |
7753dea8 | 213 | } |
fc7a59ce AM |
214 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
215 | if (bin) { | |
216 | consumerd64_bin = bin; | |
ebaeda94 | 217 | } |
72f579ee | 218 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
219 | if (libdir) { |
220 | consumerd32_libdir = libdir; | |
221 | } | |
72f579ee | 222 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
223 | if (libdir) { |
224 | consumerd64_libdir = libdir; | |
fb09408a MD |
225 | } |
226 | } | |
227 | ||
5eb91c98 DG |
228 | /* |
229 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
230 | */ | |
231 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
232 | unsigned int size) | |
233 | { | |
234 | int ret; | |
235 | ||
236 | if (events == NULL || size == 0) { | |
237 | ret = -1; | |
238 | goto error; | |
239 | } | |
240 | ||
241 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
242 | if (ret < 0) { | |
243 | goto error; | |
244 | } | |
245 | ||
246 | /* Add quit pipe */ | |
247 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | ||
254 | error: | |
255 | return ret; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Check if the thread quit pipe was triggered. | |
260 | * | |
261 | * Return 1 if it was triggered else 0; | |
262 | */ | |
263 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
264 | { | |
265 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
266 | return 1; | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
0fdd1e2c DG |
272 | /* |
273 | * Return group ID of the tracing group or -1 if not found. | |
274 | */ | |
996b65c8 MD |
275 | static gid_t allowed_group(void) |
276 | { | |
277 | struct group *grp; | |
278 | ||
274e143b MD |
279 | if (opt_tracing_group) { |
280 | grp = getgrnam(opt_tracing_group); | |
281 | } else { | |
282 | grp = getgrnam(default_tracing_group); | |
283 | } | |
996b65c8 MD |
284 | if (!grp) { |
285 | return -1; | |
286 | } else { | |
287 | return grp->gr_gid; | |
288 | } | |
289 | } | |
290 | ||
273ea72c | 291 | /* |
5eb91c98 | 292 | * Init thread quit pipe. |
273ea72c DG |
293 | * |
294 | * Return -1 on error or 0 if all pipes are created. | |
295 | */ | |
296 | static int init_thread_quit_pipe(void) | |
297 | { | |
730389d9 | 298 | int ret, i; |
273ea72c | 299 | |
730389d9 | 300 | ret = pipe(thread_quit_pipe); |
273ea72c | 301 | if (ret < 0) { |
730389d9 | 302 | PERROR("thread quit pipe"); |
273ea72c DG |
303 | goto error; |
304 | } | |
305 | ||
730389d9 DG |
306 | for (i = 0; i < 2; i++) { |
307 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
308 | if (ret < 0) { | |
309 | PERROR("fcntl"); | |
310 | goto error; | |
311 | } | |
312 | } | |
313 | ||
273ea72c DG |
314 | error: |
315 | return ret; | |
316 | } | |
317 | ||
fac6795d | 318 | /* |
d063d709 DG |
319 | * Complete teardown of a kernel session. This free all data structure related |
320 | * to a kernel session and update counter. | |
fac6795d | 321 | */ |
1d4b027a | 322 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 323 | { |
8f7a84dd | 324 | if (!session->kernel_session) { |
99bab54f | 325 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 326 | return; |
8f7a84dd DG |
327 | } |
328 | ||
84ea9c99 | 329 | DBG("Tearing down kernel session"); |
d9800920 | 330 | |
84ea9c99 MD |
331 | /* |
332 | * If a custom kernel consumer was registered, close the socket before | |
333 | * tearing down the complete kernel session structure | |
334 | */ | |
335 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
336 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); | |
fac6795d | 337 | } |
84ea9c99 MD |
338 | |
339 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
340 | } |
341 | ||
f6a9efaa DG |
342 | /* |
343 | * Complete teardown of all UST sessions. This will free everything on his path | |
344 | * and destroy the core essence of all ust sessions :) | |
345 | */ | |
346 | static void teardown_ust_session(struct ltt_session *session) | |
347 | { | |
84cd17c6 MD |
348 | int ret; |
349 | ||
8f7a84dd | 350 | if (!session->ust_session) { |
99bab54f | 351 | DBG3("No UST session when tearing down session"); |
f470a390 | 352 | return; |
8f7a84dd DG |
353 | } |
354 | ||
84ea9c99 | 355 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 356 | |
84cd17c6 MD |
357 | ret = ust_app_destroy_trace_all(session->ust_session); |
358 | if (ret) { | |
359 | ERR("Error in ust_app_destroy_trace_all"); | |
360 | } | |
8f7a84dd | 361 | |
f6a9efaa DG |
362 | trace_ust_destroy_session(session->ust_session); |
363 | } | |
364 | ||
099e26bd DG |
365 | /* |
366 | * Stop all threads by closing the thread quit pipe. | |
367 | */ | |
cf3af59e MD |
368 | static void stop_threads(void) |
369 | { | |
5eb91c98 DG |
370 | int ret; |
371 | ||
cf3af59e MD |
372 | /* Stopping all threads */ |
373 | DBG("Terminating all threads"); | |
54d01ffb | 374 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
375 | if (ret < 0) { |
376 | ERR("write error on thread quit pipe"); | |
377 | } | |
378 | ||
099e26bd DG |
379 | /* Dispatch thread */ |
380 | dispatch_thread_exit = 1; | |
381 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
382 | } |
383 | ||
fac6795d | 384 | /* |
d063d709 | 385 | * Cleanup the daemon |
fac6795d | 386 | */ |
cf3af59e | 387 | static void cleanup(void) |
fac6795d | 388 | { |
1d4b027a DG |
389 | int ret; |
390 | char *cmd; | |
af9737e9 | 391 | struct ltt_session *sess, *stmp; |
fac6795d | 392 | |
1d4b027a | 393 | DBG("Cleaning up"); |
e07ae692 | 394 | |
67e40797 DG |
395 | DBG("Removing %s directory", rundir); |
396 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
397 | if (ret < 0) { | |
398 | ERR("asprintf failed. Something is really wrong!"); | |
399 | } | |
5461b305 | 400 | |
67e40797 DG |
401 | /* Remove lttng run directory */ |
402 | ret = system(cmd); | |
403 | if (ret < 0) { | |
404 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 405 | } |
67e40797 | 406 | free(cmd); |
5461b305 | 407 | |
99bab54f | 408 | DBG("Cleaning up all sessions"); |
fac6795d | 409 | |
b5541356 | 410 | /* Destroy session list mutex */ |
273ea72c DG |
411 | if (session_list_ptr != NULL) { |
412 | pthread_mutex_destroy(&session_list_ptr->lock); | |
413 | ||
414 | /* Cleanup ALL session */ | |
54d01ffb DG |
415 | cds_list_for_each_entry_safe(sess, stmp, |
416 | &session_list_ptr->head, list) { | |
273ea72c | 417 | teardown_kernel_session(sess); |
f6a9efaa DG |
418 | teardown_ust_session(sess); |
419 | free(sess); | |
273ea72c DG |
420 | } |
421 | } | |
422 | ||
099e26bd | 423 | DBG("Closing all UST sockets"); |
56fff090 | 424 | ust_app_clean_list(); |
099e26bd | 425 | |
3bd1e081 | 426 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 427 | |
4fba7219 DG |
428 | if (is_root && !opt_no_kernel) { |
429 | DBG2("Closing kernel fd"); | |
430 | close(kernel_tracer_fd); | |
2f50c8a3 | 431 | DBG("Unloading kernel modules"); |
096102bd | 432 | modprobe_remove_lttng_all(); |
2f50c8a3 | 433 | } |
5eb91c98 DG |
434 | |
435 | close(thread_quit_pipe[0]); | |
436 | close(thread_quit_pipe[1]); | |
421cb601 DG |
437 | |
438 | /* <fun> */ | |
f56a39af | 439 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
440 | "Matthew, BEET driven development works!%c[%dm", |
441 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
442 | /* </fun> */ | |
fac6795d DG |
443 | } |
444 | ||
e065084a | 445 | /* |
d063d709 | 446 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 447 | * |
d063d709 | 448 | * Return lttcomm error code. |
e065084a DG |
449 | */ |
450 | static int send_unix_sock(int sock, void *buf, size_t len) | |
451 | { | |
452 | /* Check valid length */ | |
453 | if (len <= 0) { | |
454 | return -1; | |
455 | } | |
456 | ||
457 | return lttcomm_send_unix_sock(sock, buf, len); | |
458 | } | |
459 | ||
5461b305 | 460 | /* |
d063d709 | 461 | * Free memory of a command context structure. |
5461b305 | 462 | */ |
a2fb29a5 | 463 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 464 | { |
a2fb29a5 DG |
465 | DBG("Clean command context structure"); |
466 | if (*cmd_ctx) { | |
467 | if ((*cmd_ctx)->llm) { | |
468 | free((*cmd_ctx)->llm); | |
5461b305 | 469 | } |
a2fb29a5 DG |
470 | if ((*cmd_ctx)->lsm) { |
471 | free((*cmd_ctx)->lsm); | |
5461b305 | 472 | } |
a2fb29a5 DG |
473 | free(*cmd_ctx); |
474 | *cmd_ctx = NULL; | |
5461b305 DG |
475 | } |
476 | } | |
477 | ||
f3ed775e | 478 | /* |
d063d709 | 479 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 480 | */ |
2bdd86d4 | 481 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
482 | int sock, struct ltt_kernel_channel *channel, |
483 | uid_t uid, gid_t gid) | |
f3ed775e DG |
484 | { |
485 | int ret; | |
f3ed775e | 486 | struct ltt_kernel_stream *stream; |
3bd1e081 | 487 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 488 | |
3bd1e081 | 489 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 490 | channel->channel->name); |
f3ed775e | 491 | |
3bd1e081 MD |
492 | /* Send channel */ |
493 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
494 | lkm.u.channel.channel_key = channel->fd; | |
495 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
496 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 497 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 498 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 499 | if (ret < 0) { |
3bd1e081 | 500 | perror("send consumer channel"); |
f3ed775e DG |
501 | goto error; |
502 | } | |
503 | ||
3bd1e081 | 504 | /* Send streams */ |
7a485870 | 505 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
506 | if (!stream->fd) { |
507 | continue; | |
508 | } | |
509 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
510 | lkm.u.stream.channel_key = channel->fd; | |
511 | lkm.u.stream.stream_key = stream->fd; | |
512 | lkm.u.stream.state = stream->state; | |
513 | lkm.u.stream.output = channel->channel->attr.output; | |
514 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
515 | lkm.u.stream.uid = uid; |
516 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
517 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
518 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
519 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
520 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
521 | if (ret < 0) { | |
522 | perror("send consumer stream"); | |
523 | goto error; | |
524 | } | |
525 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
526 | if (ret < 0) { | |
527 | perror("send consumer stream ancillary data"); | |
528 | goto error; | |
f3ed775e DG |
529 | } |
530 | } | |
531 | ||
3bd1e081 | 532 | DBG("consumer channel streams sent"); |
f3ed775e DG |
533 | |
534 | return 0; | |
535 | ||
536 | error: | |
537 | return ret; | |
538 | } | |
539 | ||
540 | /* | |
d063d709 | 541 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 542 | */ |
2bdd86d4 | 543 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 544 | struct ltt_kernel_session *session) |
f3ed775e DG |
545 | { |
546 | int ret; | |
547 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
548 | struct lttcomm_consumer_msg lkm; |
549 | int sock = session->consumer_fd; | |
7a485870 DG |
550 | |
551 | DBG("Sending metadata stream fd"); | |
552 | ||
2bdd86d4 | 553 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 554 | if (session->consumer_fd == 0) { |
3bd1e081 | 555 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
556 | } |
557 | ||
7a485870 | 558 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
559 | /* Send metadata channel fd */ |
560 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
561 | lkm.u.channel.channel_key = session->metadata->fd; | |
562 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
563 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
564 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
565 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
566 | if (ret < 0) { | |
567 | perror("send consumer channel"); | |
568 | goto error; | |
569 | } | |
570 | ||
571 | /* Send metadata stream fd */ | |
572 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
573 | lkm.u.stream.channel_key = session->metadata->fd; | |
574 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
575 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
576 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
577 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
578 | lkm.u.stream.uid = session->uid; |
579 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
580 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
581 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
582 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
583 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
584 | if (ret < 0) { | |
585 | perror("send consumer stream"); | |
586 | goto error; | |
587 | } | |
588 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 589 | if (ret < 0) { |
3bd1e081 | 590 | perror("send consumer stream"); |
7a485870 DG |
591 | goto error; |
592 | } | |
593 | } | |
f3ed775e | 594 | |
f3ed775e | 595 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
596 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
597 | session->uid, session->gid); | |
2bdd86d4 MD |
598 | if (ret < 0) { |
599 | goto error; | |
600 | } | |
601 | } | |
602 | ||
603 | DBG("consumer fds (metadata and channel streams) sent"); | |
604 | ||
605 | return 0; | |
606 | ||
607 | error: | |
608 | return ret; | |
609 | } | |
610 | ||
fac6795d | 611 | /* |
0fdd1e2c | 612 | * Notify UST applications using the shm mmap futex. |
fac6795d | 613 | */ |
0fdd1e2c | 614 | static int notify_ust_apps(int active) |
fac6795d | 615 | { |
0fdd1e2c | 616 | char *wait_shm_mmap; |
fac6795d | 617 | |
0fdd1e2c | 618 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 619 | |
0fdd1e2c DG |
620 | /* See shm.c for this call implying mmap, shm and futex calls */ |
621 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
622 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
623 | goto error; |
624 | } | |
625 | ||
0fdd1e2c DG |
626 | /* Wake waiting process */ |
627 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
628 | ||
629 | /* Apps notified successfully */ | |
630 | return 0; | |
fac6795d DG |
631 | |
632 | error: | |
0fdd1e2c | 633 | return -1; |
fac6795d DG |
634 | } |
635 | ||
e065084a | 636 | /* |
d063d709 DG |
637 | * Setup the outgoing data buffer for the response (llm) by allocating the |
638 | * right amount of memory and copying the original information from the lsm | |
639 | * structure. | |
ca95a216 | 640 | * |
d063d709 | 641 | * Return total size of the buffer pointed by buf. |
ca95a216 | 642 | */ |
5461b305 | 643 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 644 | { |
f3ed775e | 645 | int ret, buf_size; |
ca95a216 | 646 | |
f3ed775e | 647 | buf_size = size; |
5461b305 | 648 | |
ba7f0ae5 | 649 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 650 | if (cmd_ctx->llm == NULL) { |
ba7f0ae5 | 651 | perror("zmalloc"); |
5461b305 | 652 | ret = -ENOMEM; |
ca95a216 DG |
653 | goto error; |
654 | } | |
655 | ||
5461b305 DG |
656 | /* Copy common data */ |
657 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 658 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 659 | |
5461b305 DG |
660 | cmd_ctx->llm->data_size = size; |
661 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
662 | ||
ca95a216 DG |
663 | return buf_size; |
664 | ||
665 | error: | |
666 | return ret; | |
667 | } | |
668 | ||
7a485870 | 669 | /* |
5eb91c98 | 670 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 671 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 672 | */ |
5eb91c98 | 673 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 674 | { |
5eb91c98 | 675 | int ret; |
7a485870 DG |
676 | struct ltt_session *session; |
677 | struct ltt_kernel_channel *channel; | |
678 | ||
5eb91c98 | 679 | DBG("Updating kernel poll set"); |
7a485870 | 680 | |
54d01ffb | 681 | session_lock_list(); |
b5541356 | 682 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 683 | session_lock(session); |
7a485870 | 684 | if (session->kernel_session == NULL) { |
54d01ffb | 685 | session_unlock(session); |
7a485870 DG |
686 | continue; |
687 | } | |
7a485870 | 688 | |
54d01ffb DG |
689 | cds_list_for_each_entry(channel, |
690 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
691 | /* Add channel fd to the kernel poll set */ |
692 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
693 | if (ret < 0) { | |
54d01ffb | 694 | session_unlock(session); |
5eb91c98 DG |
695 | goto error; |
696 | } | |
697 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 698 | } |
54d01ffb | 699 | session_unlock(session); |
7a485870 | 700 | } |
54d01ffb | 701 | session_unlock_list(); |
7a485870 | 702 | |
5eb91c98 | 703 | return 0; |
7a485870 DG |
704 | |
705 | error: | |
54d01ffb | 706 | session_unlock_list(); |
7a485870 DG |
707 | return -1; |
708 | } | |
709 | ||
710 | /* | |
54d01ffb | 711 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 712 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 713 | * |
d063d709 | 714 | * Useful for CPU hotplug feature. |
7a485870 | 715 | */ |
2bdd86d4 | 716 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
717 | { |
718 | int ret = 0; | |
719 | struct ltt_session *session; | |
720 | struct ltt_kernel_channel *channel; | |
721 | ||
722 | DBG("Updating kernel streams for channel fd %d", fd); | |
723 | ||
54d01ffb | 724 | session_lock_list(); |
b5541356 | 725 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 726 | session_lock(session); |
7a485870 | 727 | if (session->kernel_session == NULL) { |
54d01ffb | 728 | session_unlock(session); |
7a485870 DG |
729 | continue; |
730 | } | |
d9800920 DG |
731 | |
732 | /* This is not suppose to be 0 but this is an extra security check */ | |
733 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 734 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
735 | } |
736 | ||
5eb91c98 DG |
737 | cds_list_for_each_entry(channel, |
738 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
739 | if (channel->fd == fd) { |
740 | DBG("Channel found, updating kernel streams"); | |
741 | ret = kernel_open_channel_stream(channel); | |
742 | if (ret < 0) { | |
b3c750d2 | 743 | goto error; |
7a485870 | 744 | } |
d9800920 | 745 | |
7a485870 | 746 | /* |
5eb91c98 DG |
747 | * Have we already sent fds to the consumer? If yes, it means |
748 | * that tracing is started so it is safe to send our updated | |
749 | * stream fds. | |
7a485870 | 750 | */ |
3bd1e081 | 751 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 752 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
753 | session->kernel_session->consumer_fd, channel, |
754 | session->uid, session->gid); | |
7a485870 | 755 | if (ret < 0) { |
b3c750d2 | 756 | goto error; |
7a485870 DG |
757 | } |
758 | } | |
b3c750d2 | 759 | goto error; |
7a485870 DG |
760 | } |
761 | } | |
54d01ffb | 762 | session_unlock(session); |
7a485870 | 763 | } |
54d01ffb | 764 | session_unlock_list(); |
b3c750d2 | 765 | return ret; |
7a485870 | 766 | |
b3c750d2 | 767 | error: |
54d01ffb DG |
768 | session_unlock(session); |
769 | session_unlock_list(); | |
7a485870 DG |
770 | return ret; |
771 | } | |
772 | ||
487cf67c DG |
773 | /* |
774 | * For each tracing session, update newly registered apps. | |
775 | */ | |
776 | static void update_ust_app(int app_sock) | |
777 | { | |
778 | struct ltt_session *sess, *stmp; | |
779 | ||
4ee14516 DG |
780 | session_lock_list(); |
781 | ||
487cf67c DG |
782 | /* For all tracing session(s) */ |
783 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 784 | session_lock(sess); |
421cb601 DG |
785 | if (sess->ust_session) { |
786 | ust_app_global_update(sess->ust_session, app_sock); | |
787 | } | |
4ee14516 | 788 | session_unlock(sess); |
487cf67c | 789 | } |
4ee14516 DG |
790 | |
791 | session_unlock_list(); | |
487cf67c DG |
792 | } |
793 | ||
7a485870 | 794 | /* |
d063d709 | 795 | * This thread manage event coming from the kernel. |
7a485870 | 796 | * |
d063d709 DG |
797 | * Features supported in this thread: |
798 | * -) CPU Hotplug | |
7a485870 DG |
799 | */ |
800 | static void *thread_manage_kernel(void *data) | |
801 | { | |
5eb91c98 DG |
802 | int ret, i, pollfd, update_poll_flag = 1; |
803 | uint32_t revents, nb_fd; | |
7a485870 | 804 | char tmp; |
5eb91c98 | 805 | struct lttng_poll_event events; |
7a485870 DG |
806 | |
807 | DBG("Thread manage kernel started"); | |
808 | ||
5eb91c98 DG |
809 | ret = create_thread_poll_set(&events, 2); |
810 | if (ret < 0) { | |
811 | goto error; | |
812 | } | |
813 | ||
814 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
815 | if (ret < 0) { | |
816 | goto error; | |
817 | } | |
818 | ||
7a485870 DG |
819 | while (1) { |
820 | if (update_poll_flag == 1) { | |
5f822d0a DG |
821 | /* |
822 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
823 | * quit pipe and the kernel pipe. | |
824 | */ | |
825 | events.nb_fd = 2; | |
826 | ||
5eb91c98 DG |
827 | ret = update_kernel_poll(&events); |
828 | if (ret < 0) { | |
7a485870 DG |
829 | goto error; |
830 | } | |
831 | update_poll_flag = 0; | |
832 | } | |
833 | ||
5eb91c98 DG |
834 | nb_fd = LTTNG_POLL_GETNB(&events); |
835 | ||
836 | DBG("Thread kernel polling on %d fds", nb_fd); | |
837 | ||
838 | /* Zeroed the poll events */ | |
839 | lttng_poll_reset(&events); | |
7a485870 DG |
840 | |
841 | /* Poll infinite value of time */ | |
5eb91c98 | 842 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 843 | if (ret < 0) { |
7a485870 DG |
844 | goto error; |
845 | } else if (ret == 0) { | |
846 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
847 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
848 | "This should not have happened! Continuing..."); | |
7a485870 DG |
849 | continue; |
850 | } | |
851 | ||
5eb91c98 DG |
852 | for (i = 0; i < nb_fd; i++) { |
853 | /* Fetch once the poll data */ | |
854 | revents = LTTNG_POLL_GETEV(&events, i); | |
855 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 856 | |
5eb91c98 DG |
857 | /* Thread quit pipe has been closed. Killing thread. */ |
858 | ret = check_thread_quit_pipe(pollfd, revents); | |
859 | if (ret) { | |
860 | goto error; | |
861 | } | |
7a485870 | 862 | |
5eb91c98 DG |
863 | /* Check for data on kernel pipe */ |
864 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
865 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
866 | update_poll_flag = 1; | |
867 | continue; | |
868 | } else { | |
869 | /* | |
870 | * New CPU detected by the kernel. Adding kernel stream to | |
871 | * kernel session and updating the kernel consumer | |
872 | */ | |
873 | if (revents & LPOLLIN) { | |
2bdd86d4 | 874 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
875 | if (ret < 0) { |
876 | continue; | |
877 | } | |
878 | break; | |
879 | /* | |
880 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
881 | * and unregister kernel stream at this point. | |
882 | */ | |
7a485870 | 883 | } |
7a485870 DG |
884 | } |
885 | } | |
886 | } | |
887 | ||
888 | error: | |
889 | DBG("Kernel thread dying"); | |
273ea72c DG |
890 | close(kernel_poll_pipe[0]); |
891 | close(kernel_poll_pipe[1]); | |
5eb91c98 DG |
892 | |
893 | lttng_poll_clean(&events); | |
894 | ||
7a485870 DG |
895 | return NULL; |
896 | } | |
897 | ||
1d4b027a | 898 | /* |
3bd1e081 | 899 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 900 | */ |
3bd1e081 | 901 | static void *thread_manage_consumer(void *data) |
1d4b027a | 902 | { |
5eb91c98 DG |
903 | int sock = 0, i, ret, pollfd; |
904 | uint32_t revents, nb_fd; | |
1d4b027a | 905 | enum lttcomm_return_code code; |
5eb91c98 | 906 | struct lttng_poll_event events; |
3bd1e081 | 907 | struct consumer_data *consumer_data = data; |
1d4b027a | 908 | |
3bd1e081 | 909 | DBG("[thread] Manage consumer started"); |
1d4b027a | 910 | |
3bd1e081 | 911 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
912 | if (ret < 0) { |
913 | goto error; | |
914 | } | |
915 | ||
5eb91c98 DG |
916 | /* |
917 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
918 | * Nothing more will be added to this poll set. | |
919 | */ | |
920 | ret = create_thread_poll_set(&events, 2); | |
921 | if (ret < 0) { | |
922 | goto error; | |
923 | } | |
273ea72c | 924 | |
3bd1e081 | 925 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
926 | if (ret < 0) { |
927 | goto error; | |
928 | } | |
929 | ||
930 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
931 | |
932 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 933 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 934 | if (ret < 0) { |
273ea72c DG |
935 | goto error; |
936 | } | |
937 | ||
5eb91c98 DG |
938 | for (i = 0; i < nb_fd; i++) { |
939 | /* Fetch once the poll data */ | |
940 | revents = LTTNG_POLL_GETEV(&events, i); | |
941 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
942 | ||
943 | /* Thread quit pipe has been closed. Killing thread. */ | |
944 | ret = check_thread_quit_pipe(pollfd, revents); | |
945 | if (ret) { | |
946 | goto error; | |
947 | } | |
948 | ||
949 | /* Event on the registration socket */ | |
3bd1e081 | 950 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 951 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 952 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
953 | goto error; |
954 | } | |
955 | } | |
273ea72c DG |
956 | } |
957 | ||
3bd1e081 | 958 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
959 | if (sock < 0) { |
960 | goto error; | |
961 | } | |
962 | ||
3bd1e081 | 963 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 964 | |
712ea556 | 965 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
966 | ret = lttcomm_recv_unix_sock(sock, &code, |
967 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
968 | if (ret <= 0) { |
969 | goto error; | |
970 | } | |
971 | ||
3bd1e081 MD |
972 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
973 | consumer_data->cmd_sock = | |
974 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
975 | if (consumer_data->cmd_sock < 0) { | |
976 | sem_post(&consumer_data->sem); | |
48842b30 | 977 | PERROR("consumer connect"); |
1d4b027a DG |
978 | goto error; |
979 | } | |
980 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
981 | sem_post(&consumer_data->sem); |
982 | DBG("consumer command socket ready"); | |
1d4b027a | 983 | } else { |
3bd1e081 | 984 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
985 | lttcomm_get_readable_code(-code)); |
986 | goto error; | |
987 | } | |
988 | ||
54d01ffb | 989 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 990 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 991 | if (ret < 0) { |
72079cae DG |
992 | goto error; |
993 | } | |
994 | ||
5eb91c98 DG |
995 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
996 | if (ret < 0) { | |
72079cae | 997 | goto error; |
5eb91c98 DG |
998 | } |
999 | ||
1000 | /* Update number of fd */ | |
1001 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1002 | ||
1003 | /* Inifinite blocking call, waiting for transmission */ | |
1004 | ret = lttng_poll_wait(&events, -1); | |
1005 | if (ret < 0) { | |
72079cae DG |
1006 | goto error; |
1007 | } | |
1008 | ||
5eb91c98 DG |
1009 | for (i = 0; i < nb_fd; i++) { |
1010 | /* Fetch once the poll data */ | |
1011 | revents = LTTNG_POLL_GETEV(&events, i); | |
1012 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1013 | ||
1014 | /* Thread quit pipe has been closed. Killing thread. */ | |
1015 | ret = check_thread_quit_pipe(pollfd, revents); | |
1016 | if (ret) { | |
1017 | goto error; | |
1018 | } | |
1019 | ||
1020 | /* Event on the kconsumerd socket */ | |
1021 | if (pollfd == sock) { | |
1022 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1023 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1024 | goto error; |
1025 | } | |
1026 | } | |
1027 | } | |
1028 | ||
712ea556 | 1029 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1030 | ret = lttcomm_recv_unix_sock(sock, &code, |
1031 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1032 | if (ret <= 0) { |
3bd1e081 | 1033 | ERR("consumer closed the command socket"); |
712ea556 | 1034 | goto error; |
6f61d021 | 1035 | } |
1d4b027a | 1036 | |
3bd1e081 | 1037 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1038 | |
1d4b027a | 1039 | error: |
3bd1e081 MD |
1040 | DBG("consumer thread dying"); |
1041 | close(consumer_data->err_sock); | |
1042 | close(consumer_data->cmd_sock); | |
5eb91c98 | 1043 | close(sock); |
273ea72c | 1044 | |
3bd1e081 MD |
1045 | unlink(consumer_data->err_unix_sock_path); |
1046 | unlink(consumer_data->cmd_unix_sock_path); | |
1047 | consumer_data->pid = 0; | |
1d4b027a | 1048 | |
5eb91c98 | 1049 | lttng_poll_clean(&events); |
0177d773 | 1050 | |
5eb91c98 | 1051 | return NULL; |
099e26bd DG |
1052 | } |
1053 | ||
099e26bd DG |
1054 | /* |
1055 | * This thread manage application communication. | |
1d4b027a DG |
1056 | */ |
1057 | static void *thread_manage_apps(void *data) | |
099e26bd | 1058 | { |
5eb91c98 DG |
1059 | int i, ret, pollfd; |
1060 | uint32_t revents, nb_fd; | |
099e26bd | 1061 | struct ust_command ust_cmd; |
5eb91c98 | 1062 | struct lttng_poll_event events; |
099e26bd DG |
1063 | |
1064 | DBG("[thread] Manage application started"); | |
1065 | ||
f6a9efaa DG |
1066 | rcu_register_thread(); |
1067 | rcu_thread_online(); | |
1068 | ||
5eb91c98 DG |
1069 | ret = create_thread_poll_set(&events, 2); |
1070 | if (ret < 0) { | |
1071 | goto error; | |
1072 | } | |
099e26bd | 1073 | |
5eb91c98 DG |
1074 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1075 | if (ret < 0) { | |
1076 | goto error; | |
1077 | } | |
099e26bd | 1078 | |
5eb91c98 DG |
1079 | while (1) { |
1080 | /* Zeroed the events structure */ | |
1081 | lttng_poll_reset(&events); | |
0177d773 | 1082 | |
5eb91c98 | 1083 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1084 | |
1085 | DBG("Apps thread polling on %d fds", nb_fd); | |
1086 | ||
1087 | /* Inifinite blocking call, waiting for transmission */ | |
5eb91c98 | 1088 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1089 | if (ret < 0) { |
099e26bd DG |
1090 | goto error; |
1091 | } | |
1092 | ||
5eb91c98 DG |
1093 | for (i = 0; i < nb_fd; i++) { |
1094 | /* Fetch once the poll data */ | |
1095 | revents = LTTNG_POLL_GETEV(&events, i); | |
1096 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1097 | ||
1098 | /* Thread quit pipe has been closed. Killing thread. */ | |
1099 | ret = check_thread_quit_pipe(pollfd, revents); | |
1100 | if (ret) { | |
099e26bd | 1101 | goto error; |
5eb91c98 | 1102 | } |
099e26bd | 1103 | |
5eb91c98 DG |
1104 | /* Inspect the apps cmd pipe */ |
1105 | if (pollfd == apps_cmd_pipe[0]) { | |
1106 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1107 | ERR("Apps command pipe error"); | |
0177d773 | 1108 | goto error; |
5eb91c98 DG |
1109 | } else if (revents & LPOLLIN) { |
1110 | /* Empty pipe */ | |
1111 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1112 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
1113 | perror("read apps cmd pipe"); | |
1114 | goto error; | |
1115 | } | |
099e26bd | 1116 | |
5eb91c98 | 1117 | /* Register applicaton to the session daemon */ |
56fff090 | 1118 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1119 | ust_cmd.sock); |
88ff5b7f | 1120 | if (ret == -ENOMEM) { |
5eb91c98 | 1121 | goto error; |
88ff5b7f MD |
1122 | } else if (ret < 0) { |
1123 | break; | |
5eb91c98 DG |
1124 | } |
1125 | ||
acc7b41b | 1126 | /* |
e0c7ec2b | 1127 | * Validate UST version compatibility. |
acc7b41b | 1128 | */ |
e0c7ec2b DG |
1129 | ret = ust_app_validate_version(ust_cmd.sock); |
1130 | if (ret >= 0) { | |
1131 | /* | |
1132 | * Add channel(s) and event(s) to newly registered apps | |
1133 | * from lttng global UST domain. | |
1134 | */ | |
1135 | update_ust_app(ust_cmd.sock); | |
1136 | } | |
acc7b41b | 1137 | |
f2ca2e25 | 1138 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1139 | if (ret < 0) { |
1140 | /* | |
1141 | * If the registration is not possible, we simply | |
1142 | * unregister the apps and continue | |
1143 | */ | |
56fff090 | 1144 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1145 | } else { |
1146 | /* | |
1147 | * We just need here to monitor the close of the UST | |
1148 | * socket and poll set monitor those by default. | |
1149 | */ | |
1150 | ret = lttng_poll_add(&events, ust_cmd.sock, 0); | |
1151 | if (ret < 0) { | |
1152 | goto error; | |
1153 | } | |
1154 | ||
54d01ffb DG |
1155 | DBG("Apps with sock %d added to poll set", |
1156 | ust_cmd.sock); | |
5eb91c98 | 1157 | } |
487cf67c | 1158 | |
5eb91c98 | 1159 | break; |
0177d773 | 1160 | } |
5eb91c98 DG |
1161 | } else { |
1162 | /* | |
54d01ffb DG |
1163 | * At this point, we know that a registered application made |
1164 | * the event at poll_wait. | |
5eb91c98 DG |
1165 | */ |
1166 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1167 | /* Removing from the poll set */ | |
1168 | ret = lttng_poll_del(&events, pollfd); | |
1169 | if (ret < 0) { | |
1170 | goto error; | |
1171 | } | |
099e26bd | 1172 | |
b9d9b220 | 1173 | /* Socket closed on remote end. */ |
56fff090 | 1174 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1175 | break; |
1176 | } | |
099e26bd DG |
1177 | } |
1178 | } | |
099e26bd DG |
1179 | } |
1180 | ||
1181 | error: | |
1182 | DBG("Application communication apps dying"); | |
1183 | close(apps_cmd_pipe[0]); | |
1184 | close(apps_cmd_pipe[1]); | |
1185 | ||
5eb91c98 | 1186 | lttng_poll_clean(&events); |
099e26bd | 1187 | |
f6a9efaa DG |
1188 | rcu_thread_offline(); |
1189 | rcu_unregister_thread(); | |
099e26bd DG |
1190 | return NULL; |
1191 | } | |
1192 | ||
1193 | /* | |
1194 | * Dispatch request from the registration threads to the application | |
1195 | * communication thread. | |
1196 | */ | |
1197 | static void *thread_dispatch_ust_registration(void *data) | |
1198 | { | |
1199 | int ret; | |
1200 | struct cds_wfq_node *node; | |
1201 | struct ust_command *ust_cmd = NULL; | |
1202 | ||
1203 | DBG("[thread] Dispatch UST command started"); | |
1204 | ||
1205 | while (!dispatch_thread_exit) { | |
1206 | /* Atomically prepare the queue futex */ | |
1207 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1208 | ||
1209 | do { | |
1210 | /* Dequeue command for registration */ | |
1211 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1212 | if (node == NULL) { | |
00a17c97 | 1213 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1214 | /* Continue thread execution */ |
1215 | break; | |
1216 | } | |
1217 | ||
1218 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1219 | ||
2f50c8a3 DG |
1220 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1221 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1222 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1223 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1224 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1225 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1226 | /* |
1227 | * Inform apps thread of the new application registration. This | |
1228 | * call is blocking so we can be assured that the data will be read | |
1229 | * at some point in time or wait to the end of the world :) | |
1230 | */ | |
1231 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1232 | sizeof(struct ust_command)); | |
1233 | if (ret < 0) { | |
1234 | perror("write apps cmd pipe"); | |
1235 | if (errno == EBADF) { | |
1236 | /* | |
1237 | * We can't inform the application thread to process | |
1238 | * registration. We will exit or else application | |
1239 | * registration will not occur and tracing will never | |
1240 | * start. | |
1241 | */ | |
1242 | goto error; | |
1243 | } | |
1244 | } | |
1245 | free(ust_cmd); | |
1246 | } while (node != NULL); | |
1247 | ||
1248 | /* Futex wait on queue. Blocking call on futex() */ | |
1249 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1250 | } | |
1251 | ||
1252 | error: | |
1253 | DBG("Dispatch thread dying"); | |
1254 | return NULL; | |
1255 | } | |
1256 | ||
1257 | /* | |
1258 | * This thread manage application registration. | |
1259 | */ | |
1260 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1261 | { |
5eb91c98 DG |
1262 | int sock = 0, i, ret, pollfd; |
1263 | uint32_t revents, nb_fd; | |
1264 | struct lttng_poll_event events; | |
099e26bd DG |
1265 | /* |
1266 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1267 | * freed in the manage apps thread. | |
1268 | */ | |
1269 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1270 | |
099e26bd | 1271 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1272 | |
1273 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1274 | if (ret < 0) { | |
1275 | goto error; | |
1276 | } | |
1277 | ||
5eb91c98 DG |
1278 | /* |
1279 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1280 | * more will be added to this poll set. | |
1281 | */ | |
1282 | ret = create_thread_poll_set(&events, 2); | |
1283 | if (ret < 0) { | |
1284 | goto error; | |
1285 | } | |
273ea72c | 1286 | |
5eb91c98 DG |
1287 | /* Add the application registration socket */ |
1288 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1289 | if (ret < 0) { | |
1290 | goto error; | |
1291 | } | |
273ea72c | 1292 | |
1d4b027a | 1293 | /* Notify all applications to register */ |
0fdd1e2c DG |
1294 | ret = notify_ust_apps(1); |
1295 | if (ret < 0) { | |
1296 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1297 | "Execution continues but there might be problem for already\n" |
1298 | "running applications that wishes to register."); | |
0fdd1e2c | 1299 | } |
1d4b027a DG |
1300 | |
1301 | while (1) { | |
1302 | DBG("Accepting application registration"); | |
273ea72c | 1303 | |
5eb91c98 DG |
1304 | nb_fd = LTTNG_POLL_GETNB(&events); |
1305 | ||
273ea72c | 1306 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 1307 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1308 | if (ret < 0) { |
273ea72c DG |
1309 | goto error; |
1310 | } | |
1311 | ||
5eb91c98 DG |
1312 | for (i = 0; i < nb_fd; i++) { |
1313 | /* Fetch once the poll data */ | |
1314 | revents = LTTNG_POLL_GETEV(&events, i); | |
1315 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1316 | |
5eb91c98 DG |
1317 | /* Thread quit pipe has been closed. Killing thread. */ |
1318 | ret = check_thread_quit_pipe(pollfd, revents); | |
1319 | if (ret) { | |
90014c57 DG |
1320 | goto error; |
1321 | } | |
1d4b027a | 1322 | |
5eb91c98 DG |
1323 | /* Event on the registration socket */ |
1324 | if (pollfd == apps_sock) { | |
1325 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1326 | ERR("Register apps socket poll error"); | |
1327 | goto error; | |
1328 | } else if (revents & LPOLLIN) { | |
1329 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1330 | if (sock < 0) { | |
1331 | goto error; | |
1332 | } | |
099e26bd | 1333 | |
5eb91c98 | 1334 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1335 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1336 | if (ust_cmd == NULL) { |
ba7f0ae5 | 1337 | perror("ust command zmalloc"); |
5eb91c98 DG |
1338 | goto error; |
1339 | } | |
1d4b027a | 1340 | |
5eb91c98 DG |
1341 | /* |
1342 | * Using message-based transmissions to ensure we don't | |
1343 | * have to deal with partially received messages. | |
1344 | */ | |
1345 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1346 | sizeof(struct ust_register_msg)); | |
1347 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1348 | if (ret < 0) { | |
1349 | perror("lttcomm_recv_unix_sock register apps"); | |
1350 | } else { | |
1351 | ERR("Wrong size received on apps register"); | |
1352 | } | |
1353 | free(ust_cmd); | |
1354 | close(sock); | |
1355 | continue; | |
1356 | } | |
099e26bd | 1357 | |
5eb91c98 | 1358 | ust_cmd->sock = sock; |
099e26bd | 1359 | |
5eb91c98 DG |
1360 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1361 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1362 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1363 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1364 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1365 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1366 | |
5eb91c98 DG |
1367 | /* |
1368 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1369 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1370 | */ |
1371 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1372 | ||
1373 | /* | |
1374 | * Wake the registration queue futex. Implicit memory | |
1375 | * barrier with the exchange in cds_wfq_enqueue. | |
1376 | */ | |
1377 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1378 | } | |
1379 | } | |
90014c57 | 1380 | } |
1d4b027a DG |
1381 | } |
1382 | ||
1383 | error: | |
0fdd1e2c DG |
1384 | DBG("UST Registration thread dying"); |
1385 | ||
1386 | /* Notify that the registration thread is gone */ | |
1387 | notify_ust_apps(0); | |
1388 | ||
1389 | close(apps_sock); | |
1390 | close(sock); | |
273ea72c | 1391 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1392 | |
5eb91c98 DG |
1393 | lttng_poll_clean(&events); |
1394 | ||
1d4b027a DG |
1395 | return NULL; |
1396 | } | |
1397 | ||
8c0faa1d | 1398 | /* |
3bd1e081 | 1399 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1400 | * exec or it will fails. |
8c0faa1d | 1401 | */ |
3bd1e081 | 1402 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1403 | { |
1404 | int ret; | |
ee0b0061 DG |
1405 | struct timespec timeout; |
1406 | ||
1407 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1408 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1409 | |
1410 | /* Setup semaphore */ | |
3bd1e081 | 1411 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1412 | if (ret < 0) { |
3bd1e081 | 1413 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1414 | goto error; |
1415 | } | |
8c0faa1d | 1416 | |
3bd1e081 MD |
1417 | ret = pthread_create(&consumer_data->thread, NULL, |
1418 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1419 | if (ret != 0) { |
3bd1e081 | 1420 | PERROR("pthread_create consumer"); |
ee0b0061 | 1421 | ret = -1; |
8c0faa1d DG |
1422 | goto error; |
1423 | } | |
1424 | ||
ee0b0061 DG |
1425 | /* Get time for sem_timedwait absolute timeout */ |
1426 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1427 | if (ret < 0) { | |
3bd1e081 | 1428 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1429 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1430 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1431 | } else { |
1432 | /* Normal timeout if the gettime was successful */ | |
1433 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1434 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1435 | } |
8c0faa1d | 1436 | |
ee0b0061 DG |
1437 | if (ret < 0) { |
1438 | if (errno == ETIMEDOUT) { | |
1439 | /* | |
1440 | * Call has timed out so we kill the kconsumerd_thread and return | |
1441 | * an error. | |
1442 | */ | |
3bd1e081 MD |
1443 | ERR("The consumer thread was never ready. Killing it"); |
1444 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1445 | if (ret < 0) { |
3bd1e081 | 1446 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1447 | } |
1448 | } else { | |
3bd1e081 | 1449 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1450 | } |
1451 | goto error; | |
1452 | } | |
1453 | ||
3bd1e081 MD |
1454 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1455 | if (consumer_data->pid == 0) { | |
712ea556 | 1456 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1457 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1458 | goto error; |
1459 | } | |
3bd1e081 | 1460 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1461 | |
8c0faa1d DG |
1462 | return 0; |
1463 | ||
1464 | error: | |
1465 | return ret; | |
1466 | } | |
1467 | ||
d9800920 | 1468 | /* |
3bd1e081 | 1469 | * Join consumer thread |
d9800920 | 1470 | */ |
3bd1e081 | 1471 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1472 | { |
1473 | void *status; | |
1474 | int ret; | |
1475 | ||
3bd1e081 MD |
1476 | if (consumer_data->pid != 0) { |
1477 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1478 | if (ret) { |
3bd1e081 | 1479 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1480 | return ret; |
1481 | } | |
3bd1e081 | 1482 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1483 | } else { |
1484 | return 0; | |
1485 | } | |
1486 | } | |
1487 | ||
8c0faa1d | 1488 | /* |
3bd1e081 | 1489 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1490 | * |
d063d709 | 1491 | * Return pid if successful else -1. |
8c0faa1d | 1492 | */ |
3bd1e081 | 1493 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1494 | { |
1495 | int ret; | |
1496 | pid_t pid; | |
94c55f17 | 1497 | const char *consumer_to_use; |
53086306 | 1498 | const char *verbosity; |
94c55f17 | 1499 | struct stat st; |
8c0faa1d | 1500 | |
3bd1e081 | 1501 | DBG("Spawning consumerd"); |
c49dc785 | 1502 | |
8c0faa1d DG |
1503 | pid = fork(); |
1504 | if (pid == 0) { | |
1505 | /* | |
3bd1e081 | 1506 | * Exec consumerd. |
8c0faa1d | 1507 | */ |
daee5345 | 1508 | if (opt_verbose_consumer) { |
53086306 DG |
1509 | verbosity = "--verbose"; |
1510 | } else { | |
1511 | verbosity = "--quiet"; | |
1512 | } | |
3bd1e081 MD |
1513 | switch (consumer_data->type) { |
1514 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1515 | /* |
c7704d57 DG |
1516 | * Find out which consumerd to execute. We will first try the |
1517 | * 64-bit path, then the sessiond's installation directory, and | |
1518 | * fallback on the 32-bit one, | |
94c55f17 | 1519 | */ |
63a799e8 AM |
1520 | DBG3("Looking for a kernel consumer at these locations:"); |
1521 | DBG3(" 1) %s", consumerd64_bin); | |
1522 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1523 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1524 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1525 | DBG3("Found location #1"); |
94c55f17 | 1526 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1527 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1528 | DBG3("Found location #2"); |
94c55f17 | 1529 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1530 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1531 | DBG3("Found location #3"); |
eb1e0bd4 | 1532 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1533 | } else { |
63a799e8 | 1534 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1535 | break; |
1536 | } | |
1537 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1538 | execl(consumer_to_use, | |
1539 | "lttng-consumerd", verbosity, "-k", | |
1540 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1541 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1542 | NULL); | |
3bd1e081 | 1543 | break; |
7753dea8 MD |
1544 | case LTTNG_CONSUMER64_UST: |
1545 | { | |
b1e0b6b6 | 1546 | char *tmpnew = NULL; |
8f4905da MD |
1547 | |
1548 | if (consumerd64_libdir[0] != '\0') { | |
1549 | char *tmp; | |
1550 | size_t tmplen; | |
1551 | ||
1552 | tmp = getenv("LD_LIBRARY_PATH"); | |
1553 | if (!tmp) { | |
1554 | tmp = ""; | |
1555 | } | |
1556 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1557 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1558 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1559 | if (!tmpnew) { | |
1560 | ret = -ENOMEM; | |
1561 | goto error; | |
1562 | } | |
1563 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1564 | strcat(tmpnew, consumerd64_libdir); | |
1565 | if (tmp[0] != '\0') { | |
1566 | strcat(tmpnew, ":"); | |
1567 | strcat(tmpnew, tmp); | |
1568 | } | |
1569 | ret = putenv(tmpnew); | |
1570 | if (ret) { | |
1571 | ret = -errno; | |
1572 | goto error; | |
1573 | } | |
1574 | } | |
94c55f17 | 1575 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1576 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1577 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1578 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1579 | NULL); | |
8f4905da MD |
1580 | if (consumerd64_libdir[0] != '\0') { |
1581 | free(tmpnew); | |
1582 | } | |
1583 | if (ret) { | |
1584 | goto error; | |
1585 | } | |
3bd1e081 | 1586 | break; |
7753dea8 MD |
1587 | } |
1588 | case LTTNG_CONSUMER32_UST: | |
1589 | { | |
937dde8e | 1590 | char *tmpnew = NULL; |
8f4905da MD |
1591 | |
1592 | if (consumerd32_libdir[0] != '\0') { | |
1593 | char *tmp; | |
1594 | size_t tmplen; | |
1595 | ||
1596 | tmp = getenv("LD_LIBRARY_PATH"); | |
1597 | if (!tmp) { | |
1598 | tmp = ""; | |
1599 | } | |
1600 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1601 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1602 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1603 | if (!tmpnew) { | |
1604 | ret = -ENOMEM; | |
1605 | goto error; | |
1606 | } | |
1607 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1608 | strcat(tmpnew, consumerd32_libdir); | |
1609 | if (tmp[0] != '\0') { | |
1610 | strcat(tmpnew, ":"); | |
1611 | strcat(tmpnew, tmp); | |
1612 | } | |
1613 | ret = putenv(tmpnew); | |
1614 | if (ret) { | |
1615 | ret = -errno; | |
1616 | goto error; | |
1617 | } | |
1618 | } | |
94c55f17 | 1619 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1620 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1621 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1622 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1623 | NULL); | |
8f4905da MD |
1624 | if (consumerd32_libdir[0] != '\0') { |
1625 | free(tmpnew); | |
1626 | } | |
1627 | if (ret) { | |
1628 | goto error; | |
1629 | } | |
7753dea8 MD |
1630 | break; |
1631 | } | |
3bd1e081 MD |
1632 | default: |
1633 | perror("unknown consumer type"); | |
1634 | exit(EXIT_FAILURE); | |
1635 | } | |
8c0faa1d DG |
1636 | if (errno != 0) { |
1637 | perror("kernel start consumer exec"); | |
1638 | } | |
1639 | exit(EXIT_FAILURE); | |
1640 | } else if (pid > 0) { | |
1641 | ret = pid; | |
8c0faa1d | 1642 | } else { |
3bd1e081 | 1643 | perror("start consumer fork"); |
8c0faa1d | 1644 | ret = -errno; |
8c0faa1d | 1645 | } |
8f4905da | 1646 | error: |
8c0faa1d DG |
1647 | return ret; |
1648 | } | |
1649 | ||
693bd40b | 1650 | /* |
3bd1e081 | 1651 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1652 | */ |
3bd1e081 | 1653 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1654 | { |
1655 | int ret; | |
1656 | ||
3bd1e081 MD |
1657 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1658 | if (consumer_data->pid != 0) { | |
1659 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1660 | goto end; |
1661 | } | |
693bd40b | 1662 | |
3bd1e081 | 1663 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1664 | if (ret < 0) { |
3bd1e081 MD |
1665 | ERR("Spawning consumerd failed"); |
1666 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1667 | goto error; |
693bd40b | 1668 | } |
c49dc785 | 1669 | |
3bd1e081 MD |
1670 | /* Setting up the consumer_data pid */ |
1671 | consumer_data->pid = ret; | |
48842b30 | 1672 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1673 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1674 | |
3bd1e081 MD |
1675 | DBG2("Spawning consumer control thread"); |
1676 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1677 | if (ret < 0) { |
3bd1e081 | 1678 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1679 | goto error; |
1680 | } | |
1681 | ||
c49dc785 | 1682 | end: |
693bd40b DG |
1683 | return 0; |
1684 | ||
1685 | error: | |
1686 | return ret; | |
1687 | } | |
1688 | ||
b73401da | 1689 | /* |
096102bd | 1690 | * Check version of the lttng-modules. |
b73401da | 1691 | */ |
096102bd | 1692 | static int validate_lttng_modules_version(void) |
b73401da | 1693 | { |
096102bd | 1694 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1695 | } |
1696 | ||
b73401da | 1697 | /* |
096102bd | 1698 | * Setup necessary data for kernel tracer action. |
b73401da | 1699 | */ |
096102bd | 1700 | static int init_kernel_tracer(void) |
b73401da DG |
1701 | { |
1702 | int ret; | |
b73401da | 1703 | |
096102bd DG |
1704 | /* Modprobe lttng kernel modules */ |
1705 | ret = modprobe_lttng_control(); | |
b73401da | 1706 | if (ret < 0) { |
b73401da DG |
1707 | goto error; |
1708 | } | |
1709 | ||
096102bd DG |
1710 | /* Open debugfs lttng */ |
1711 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1712 | if (kernel_tracer_fd < 0) { | |
1713 | DBG("Failed to open %s", module_proc_lttng); | |
1714 | ret = -1; | |
1715 | goto error_open; | |
b73401da DG |
1716 | } |
1717 | ||
096102bd DG |
1718 | /* Validate kernel version */ |
1719 | ret = validate_lttng_modules_version(); | |
b73401da | 1720 | if (ret < 0) { |
096102bd | 1721 | goto error_version; |
b73401da DG |
1722 | } |
1723 | ||
096102bd | 1724 | ret = modprobe_lttng_data(); |
b73401da | 1725 | if (ret < 0) { |
096102bd | 1726 | goto error_modules; |
8c0faa1d DG |
1727 | } |
1728 | ||
f3ed775e | 1729 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1730 | return 0; |
1731 | ||
1732 | error_version: | |
1733 | modprobe_remove_lttng_control(); | |
1734 | close(kernel_tracer_fd); | |
1735 | kernel_tracer_fd = 0; | |
1736 | return LTTCOMM_KERN_VERSION; | |
1737 | ||
1738 | error_modules: | |
1739 | close(kernel_tracer_fd); | |
1740 | ||
1741 | error_open: | |
1742 | modprobe_remove_lttng_control(); | |
b73401da DG |
1743 | |
1744 | error: | |
b73401da DG |
1745 | WARN("No kernel tracer available"); |
1746 | kernel_tracer_fd = 0; | |
096102bd | 1747 | return LTTCOMM_KERN_NA; |
f3ed775e | 1748 | } |
33a2b854 | 1749 | |
f3ed775e | 1750 | /* |
54d01ffb | 1751 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1752 | */ |
54d01ffb | 1753 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1754 | { |
f40799e8 | 1755 | int ret = 0; |
8c0faa1d | 1756 | |
3bd1e081 | 1757 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1758 | /* |
54d01ffb DG |
1759 | * Assign default kernel consumer socket if no consumer assigned to the |
1760 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1761 | * an extra security check. | |
d9800920 DG |
1762 | */ |
1763 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1764 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1765 | } |
1766 | ||
2bdd86d4 | 1767 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1768 | if (ret < 0) { |
f3ed775e DG |
1769 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1770 | goto error; | |
1771 | } | |
1d4b027a | 1772 | |
3bd1e081 | 1773 | session->consumer_fds_sent = 1; |
f3ed775e | 1774 | } |
1d4b027a DG |
1775 | |
1776 | error: | |
1777 | return ret; | |
8c0faa1d DG |
1778 | } |
1779 | ||
0177d773 DG |
1780 | /* |
1781 | * Create an UST session and add it to the session ust list. | |
1782 | */ | |
44d3bd01 | 1783 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1784 | struct lttng_domain *domain) |
0177d773 | 1785 | { |
13384287 | 1786 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1787 | int ret; |
44d3bd01 DG |
1788 | |
1789 | switch (domain->type) { | |
48842b30 | 1790 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1791 | break; |
1792 | default: | |
13384287 | 1793 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1794 | goto error; |
1795 | } | |
0177d773 DG |
1796 | |
1797 | DBG("Creating UST session"); | |
1798 | ||
a991f516 | 1799 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1800 | if (lus == NULL) { |
44d3bd01 | 1801 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1802 | goto error; |
1803 | } | |
1804 | ||
e11d277b | 1805 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1806 | session->uid, session->gid); |
0177d773 DG |
1807 | if (ret < 0) { |
1808 | if (ret != -EEXIST) { | |
1809 | ERR("Trace directory creation error"); | |
44d3bd01 | 1810 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1811 | goto error; |
1812 | } | |
1813 | } | |
1814 | ||
f6a9efaa DG |
1815 | /* The domain type dictate different actions on session creation */ |
1816 | switch (domain->type) { | |
48842b30 DG |
1817 | case LTTNG_DOMAIN_UST: |
1818 | /* No ustctl for the global UST domain */ | |
1819 | break; | |
1820 | default: | |
36dc12cc | 1821 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1822 | goto error; |
0177d773 | 1823 | } |
6df2e2c9 MD |
1824 | lus->uid = session->uid; |
1825 | lus->gid = session->gid; | |
f6a9efaa | 1826 | session->ust_session = lus; |
44d3bd01 DG |
1827 | |
1828 | return LTTCOMM_OK; | |
0177d773 DG |
1829 | |
1830 | error: | |
1831 | free(lus); | |
1832 | return ret; | |
1833 | } | |
1834 | ||
333f285e | 1835 | /* |
d063d709 | 1836 | * Create a kernel tracer session then create the default channel. |
333f285e | 1837 | */ |
6df2e2c9 | 1838 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1839 | { |
f3ed775e | 1840 | int ret; |
f3ed775e DG |
1841 | |
1842 | DBG("Creating kernel session"); | |
1843 | ||
1844 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1845 | if (ret < 0) { | |
1846 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1847 | goto error; | |
333f285e DG |
1848 | } |
1849 | ||
d9800920 | 1850 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1851 | if (kconsumer_data.cmd_sock) { |
1852 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1853 | } |
1854 | ||
e11d277b | 1855 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1856 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1857 | if (ret < 0) { |
996b65c8 | 1858 | if (ret != -EEXIST) { |
7a485870 DG |
1859 | ERR("Trace directory creation error"); |
1860 | goto error; | |
1861 | } | |
1862 | } | |
6df2e2c9 MD |
1863 | session->kernel_session->uid = session->uid; |
1864 | session->kernel_session->gid = session->gid; | |
7a485870 | 1865 | |
f3ed775e DG |
1866 | error: |
1867 | return ret; | |
333f285e DG |
1868 | } |
1869 | ||
8e0af1b4 | 1870 | /* |
c7704d57 DG |
1871 | * Check if the UID or GID match the session. Root user has access to all |
1872 | * sessions. | |
8e0af1b4 | 1873 | */ |
c7704d57 | 1874 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1875 | { |
c7704d57 | 1876 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1877 | return 0; |
1878 | } else { | |
1879 | return 1; | |
1880 | } | |
1881 | } | |
1882 | ||
1883 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1884 | { | |
1885 | unsigned int i = 0; | |
1886 | struct ltt_session *session; | |
1887 | ||
1888 | DBG("Counting number of available session for UID %d GID %d", | |
1889 | uid, gid); | |
1890 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1891 | /* | |
1892 | * Only list the sessions the user can control. | |
1893 | */ | |
1894 | if (!session_access_ok(session, uid, gid)) { | |
1895 | continue; | |
1896 | } | |
1897 | i++; | |
1898 | } | |
1899 | return i; | |
1900 | } | |
1901 | ||
6c9cc2ab DG |
1902 | /* |
1903 | * Using the session list, filled a lttng_session array to send back to the | |
1904 | * client for session listing. | |
1905 | * | |
1906 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1907 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 1908 | */ |
c7704d57 DG |
1909 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
1910 | gid_t gid) | |
6c9cc2ab | 1911 | { |
8e0af1b4 | 1912 | unsigned int i = 0; |
6c9cc2ab DG |
1913 | struct ltt_session *session; |
1914 | ||
8e0af1b4 MD |
1915 | DBG("Getting all available session for UID %d GID %d", |
1916 | uid, gid); | |
6c9cc2ab DG |
1917 | /* |
1918 | * Iterate over session list and append data after the control struct in | |
1919 | * the buffer. | |
1920 | */ | |
1921 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
1922 | /* |
1923 | * Only list the sessions the user can control. | |
1924 | */ | |
1925 | if (!session_access_ok(session, uid, gid)) { | |
1926 | continue; | |
1927 | } | |
6c9cc2ab | 1928 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 1929 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1930 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1931 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 1932 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
1933 | i++; |
1934 | } | |
1935 | } | |
1936 | ||
9f19cc17 DG |
1937 | /* |
1938 | * Fill lttng_channel array of all channels. | |
1939 | */ | |
b551a063 | 1940 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
1941 | struct lttng_channel *channels) |
1942 | { | |
1943 | int i = 0; | |
1944 | struct ltt_kernel_channel *kchan; | |
1945 | ||
1946 | DBG("Listing channels for session %s", session->name); | |
1947 | ||
b551a063 DG |
1948 | switch (domain) { |
1949 | case LTTNG_DOMAIN_KERNEL: | |
1950 | /* Kernel channels */ | |
1951 | if (session->kernel_session != NULL) { | |
1952 | cds_list_for_each_entry(kchan, | |
1953 | &session->kernel_session->channel_list.head, list) { | |
1954 | /* Copy lttng_channel struct to array */ | |
1955 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1956 | channels[i].enabled = kchan->enabled; | |
1957 | i++; | |
1958 | } | |
1959 | } | |
1960 | break; | |
1961 | case LTTNG_DOMAIN_UST: | |
1962 | { | |
bec39940 | 1963 | struct lttng_ht_iter iter; |
b551a063 DG |
1964 | struct ltt_ust_channel *uchan; |
1965 | ||
bec39940 DG |
1966 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
1967 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
1968 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
1969 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
1970 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
1971 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
1972 | channels[i].attr.switch_timer_interval = | |
1973 | uchan->attr.switch_timer_interval; | |
1974 | channels[i].attr.read_timer_interval = | |
1975 | uchan->attr.read_timer_interval; | |
aea829b3 | 1976 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
1977 | switch (uchan->attr.output) { |
1978 | case LTTNG_UST_MMAP: | |
1979 | default: | |
1980 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
1981 | break; | |
1982 | } | |
befe0905 | 1983 | i++; |
b551a063 DG |
1984 | } |
1985 | break; | |
1986 | } | |
1987 | default: | |
1988 | break; | |
1989 | } | |
1990 | } | |
1991 | ||
1992 | /* | |
1993 | * Create a list of ust global domain events. | |
1994 | */ | |
1995 | static int list_lttng_ust_global_events(char *channel_name, | |
1996 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
1997 | { | |
1998 | int i = 0, ret = 0; | |
1999 | unsigned int nb_event = 0; | |
bec39940 DG |
2000 | struct lttng_ht_iter iter; |
2001 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2002 | struct ltt_ust_channel *uchan; |
2003 | struct ltt_ust_event *uevent; | |
2004 | struct lttng_event *tmp; | |
2005 | ||
2006 | DBG("Listing UST global events for channel %s", channel_name); | |
2007 | ||
2008 | rcu_read_lock(); | |
2009 | ||
bec39940 DG |
2010 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2011 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2012 | if (node == NULL) { |
2013 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2014 | goto error; | |
b551a063 DG |
2015 | } |
2016 | ||
bec39940 | 2017 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2018 | |
bec39940 | 2019 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2020 | |
b551a063 DG |
2021 | if (nb_event == 0) { |
2022 | ret = nb_event; | |
2023 | goto error; | |
2024 | } | |
2025 | ||
2026 | DBG3("Listing UST global %d events", nb_event); | |
2027 | ||
2028 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2029 | if (tmp == NULL) { | |
2030 | ret = -LTTCOMM_FATAL; | |
2031 | goto error; | |
2032 | } | |
2033 | ||
bec39940 | 2034 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2035 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2036 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2037 | tmp[i].enabled = uevent->enabled; | |
2038 | switch (uevent->attr.instrumentation) { | |
2039 | case LTTNG_UST_TRACEPOINT: | |
2040 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2041 | break; | |
2042 | case LTTNG_UST_PROBE: | |
2043 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2044 | break; | |
2045 | case LTTNG_UST_FUNCTION: | |
2046 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2047 | break; | |
0cda4f28 | 2048 | } |
8005f29a | 2049 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2050 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2051 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2052 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2053 | break; |
8005f29a | 2054 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2055 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2056 | break; |
2057 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2058 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2059 | break; |
9f19cc17 | 2060 | } |
d7b75b30 | 2061 | i++; |
9f19cc17 DG |
2062 | } |
2063 | ||
b551a063 DG |
2064 | ret = nb_event; |
2065 | *events = tmp; | |
2066 | ||
2067 | error: | |
2068 | rcu_read_unlock(); | |
2069 | return ret; | |
9f19cc17 DG |
2070 | } |
2071 | ||
2072 | /* | |
b551a063 | 2073 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2074 | */ |
b551a063 DG |
2075 | static int list_lttng_kernel_events(char *channel_name, |
2076 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2077 | { |
b551a063 DG |
2078 | int i = 0, ret; |
2079 | unsigned int nb_event; | |
9f19cc17 | 2080 | struct ltt_kernel_event *event; |
b551a063 DG |
2081 | struct ltt_kernel_channel *kchan; |
2082 | ||
2083 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2084 | if (kchan == NULL) { | |
2085 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2086 | goto error; | |
2087 | } | |
2088 | ||
2089 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2090 | |
2091 | DBG("Listing events for channel %s", kchan->channel->name); | |
2092 | ||
b551a063 DG |
2093 | if (nb_event == 0) { |
2094 | ret = nb_event; | |
2095 | goto error; | |
2096 | } | |
2097 | ||
2098 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2099 | if (*events == NULL) { | |
2100 | ret = LTTCOMM_FATAL; | |
2101 | goto error; | |
2102 | } | |
2103 | ||
9f19cc17 DG |
2104 | /* Kernel channels */ |
2105 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2106 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2107 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2108 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2109 | switch (event->event->instrumentation) { |
2110 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2111 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2112 | break; |
2113 | case LTTNG_KERNEL_KPROBE: | |
2114 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2115 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2116 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2117 | sizeof(struct lttng_kernel_kprobe)); |
2118 | break; | |
2119 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2120 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2121 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2122 | sizeof(struct lttng_kernel_function)); |
2123 | break; | |
0133c199 | 2124 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2125 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2126 | break; |
a54bd42d | 2127 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2128 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2129 | break; |
7a3d1328 MD |
2130 | case LTTNG_KERNEL_ALL: |
2131 | assert(0); | |
2132 | break; | |
9f19cc17 DG |
2133 | } |
2134 | i++; | |
2135 | } | |
b551a063 DG |
2136 | |
2137 | return nb_event; | |
2138 | ||
2139 | error: | |
2140 | return ret; | |
9f19cc17 DG |
2141 | } |
2142 | ||
fac6795d | 2143 | /* |
54d01ffb | 2144 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2145 | */ |
54d01ffb DG |
2146 | static int cmd_disable_channel(struct ltt_session *session, |
2147 | int domain, char *channel_name) | |
fac6795d | 2148 | { |
54d01ffb | 2149 | int ret; |
78f0bacd DG |
2150 | struct ltt_ust_session *usess; |
2151 | ||
2152 | usess = session->ust_session; | |
379473d2 | 2153 | |
54d01ffb | 2154 | switch (domain) { |
78f0bacd DG |
2155 | case LTTNG_DOMAIN_KERNEL: |
2156 | { | |
2157 | ret = channel_kernel_disable(session->kernel_session, | |
2158 | channel_name); | |
2159 | if (ret != LTTCOMM_OK) { | |
2160 | goto error; | |
2161 | } | |
54d01ffb | 2162 | |
78f0bacd DG |
2163 | kernel_wait_quiescent(kernel_tracer_fd); |
2164 | break; | |
2165 | } | |
2166 | case LTTNG_DOMAIN_UST: | |
2167 | { | |
2168 | struct ltt_ust_channel *uchan; | |
bec39940 | 2169 | struct lttng_ht *chan_ht; |
78f0bacd | 2170 | |
7885e399 DG |
2171 | chan_ht = usess->domain_global.channels; |
2172 | ||
2173 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2174 | if (uchan == NULL) { |
2175 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2176 | goto error; |
78f0bacd DG |
2177 | } |
2178 | ||
7885e399 DG |
2179 | ret = channel_ust_disable(usess, domain, uchan); |
2180 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2181 | goto error; |
2182 | } | |
78f0bacd DG |
2183 | break; |
2184 | } | |
d78d6610 | 2185 | #if 0 |
78f0bacd DG |
2186 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2187 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2188 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2189 | #endif |
78f0bacd DG |
2190 | default: |
2191 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2192 | goto error; | |
20fe2104 DG |
2193 | } |
2194 | ||
54d01ffb | 2195 | ret = LTTCOMM_OK; |
d65106b1 | 2196 | |
54d01ffb DG |
2197 | error: |
2198 | return ret; | |
2199 | } | |
2200 | ||
2201 | /* | |
2202 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2203 | */ | |
44d3bd01 | 2204 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2205 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2206 | { |
2207 | int ret; | |
f6a9efaa | 2208 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2209 | struct lttng_ht *chan_ht; |
f6a9efaa | 2210 | |
5d56b5aa | 2211 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2212 | |
aea829b3 | 2213 | switch (domain) { |
44d3bd01 DG |
2214 | case LTTNG_DOMAIN_KERNEL: |
2215 | { | |
2216 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2217 | |
44d3bd01 DG |
2218 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2219 | session->kernel_session); | |
2220 | if (kchan == NULL) { | |
2221 | ret = channel_kernel_create(session->kernel_session, | |
2222 | attr, kernel_poll_pipe[1]); | |
2223 | } else { | |
2224 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2225 | } | |
2226 | ||
2227 | if (ret != LTTCOMM_OK) { | |
2228 | goto error; | |
2229 | } | |
2230 | ||
2231 | kernel_wait_quiescent(kernel_tracer_fd); | |
2232 | break; | |
2233 | } | |
f6a9efaa DG |
2234 | case LTTNG_DOMAIN_UST: |
2235 | { | |
2236 | struct ltt_ust_channel *uchan; | |
2237 | ||
7885e399 | 2238 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2239 | |
7885e399 | 2240 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2241 | if (uchan == NULL) { |
7885e399 | 2242 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2243 | } else { |
7885e399 | 2244 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2245 | } |
f6a9efaa DG |
2246 | break; |
2247 | } | |
d78d6610 | 2248 | #if 0 |
78f0bacd DG |
2249 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2250 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2251 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2252 | #endif |
44d3bd01 DG |
2253 | default: |
2254 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2255 | goto error; | |
54d01ffb DG |
2256 | } |
2257 | ||
54d01ffb DG |
2258 | error: |
2259 | return ret; | |
2260 | } | |
2261 | ||
2262 | /* | |
2263 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2264 | */ | |
2265 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2266 | char *channel_name, char *event_name) | |
2267 | { | |
2268 | int ret; | |
54d01ffb DG |
2269 | |
2270 | switch (domain) { | |
2271 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2272 | { |
2273 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2274 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2275 | |
b0a40d28 DG |
2276 | ksess = session->kernel_session; |
2277 | ||
2278 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2279 | if (kchan == NULL) { |
2280 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2281 | goto error; | |
d65106b1 DG |
2282 | } |
2283 | ||
b0a40d28 | 2284 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2285 | if (ret != LTTCOMM_OK) { |
2286 | goto error; | |
2287 | } | |
2288 | ||
2289 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2290 | break; |
2bdd86d4 MD |
2291 | } |
2292 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2293 | { |
b0a40d28 | 2294 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2295 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2296 | |
2297 | usess = session->ust_session; | |
2298 | ||
2299 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2300 | channel_name); | |
2301 | if (uchan == NULL) { | |
2302 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2303 | goto error; | |
2304 | } | |
2305 | ||
7f79d3a1 DG |
2306 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2307 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2308 | goto error; |
2309 | } | |
2310 | ||
7f79d3a1 | 2311 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2312 | channel_name); |
b0a40d28 DG |
2313 | break; |
2314 | } | |
d78d6610 | 2315 | #if 0 |
2bdd86d4 MD |
2316 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2317 | case LTTNG_DOMAIN_UST_PID: | |
2318 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2319 | #endif |
54d01ffb | 2320 | default: |
1ab1ea0b | 2321 | ret = LTTCOMM_UND; |
54d01ffb | 2322 | goto error; |
d65106b1 | 2323 | } |
26cc6b4e | 2324 | |
54d01ffb DG |
2325 | ret = LTTCOMM_OK; |
2326 | ||
2327 | error: | |
2328 | return ret; | |
2329 | } | |
2330 | ||
2331 | /* | |
2332 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2333 | */ | |
2334 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2335 | char *channel_name) | |
2336 | { | |
2337 | int ret; | |
54d01ffb DG |
2338 | |
2339 | switch (domain) { | |
2340 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2341 | { |
2342 | struct ltt_kernel_session *ksess; | |
2343 | struct ltt_kernel_channel *kchan; | |
2344 | ||
2345 | ksess = session->kernel_session; | |
2346 | ||
2347 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2348 | if (kchan == NULL) { |
2349 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2350 | goto error; | |
26cc6b4e DG |
2351 | } |
2352 | ||
9730260e | 2353 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2354 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2355 | goto error; |
26cc6b4e DG |
2356 | } |
2357 | ||
54d01ffb | 2358 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2359 | break; |
9730260e DG |
2360 | } |
2361 | case LTTNG_DOMAIN_UST: | |
2362 | { | |
2363 | struct ltt_ust_session *usess; | |
2364 | struct ltt_ust_channel *uchan; | |
2365 | ||
2366 | usess = session->ust_session; | |
2367 | ||
2368 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2369 | channel_name); | |
2370 | if (uchan == NULL) { | |
2371 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2372 | goto error; | |
2373 | } | |
2374 | ||
7f79d3a1 DG |
2375 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2376 | if (ret != 0) { | |
9730260e DG |
2377 | goto error; |
2378 | } | |
2379 | ||
7f79d3a1 | 2380 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2381 | |
2382 | break; | |
2383 | } | |
d78d6610 | 2384 | #if 0 |
9730260e DG |
2385 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2386 | case LTTNG_DOMAIN_UST_PID: | |
2387 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2388 | #endif |
54d01ffb | 2389 | default: |
1ab1ea0b | 2390 | ret = LTTCOMM_UND; |
54d01ffb | 2391 | goto error; |
26cc6b4e | 2392 | } |
e953ef25 | 2393 | |
54d01ffb | 2394 | ret = LTTCOMM_OK; |
e953ef25 | 2395 | |
54d01ffb DG |
2396 | error: |
2397 | return ret; | |
2398 | } | |
f5177a38 | 2399 | |
54d01ffb DG |
2400 | /* |
2401 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2402 | */ | |
2403 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2404 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2405 | { | |
2406 | int ret; | |
f5177a38 | 2407 | |
54d01ffb DG |
2408 | switch (domain) { |
2409 | case LTTNG_DOMAIN_KERNEL: | |
2410 | /* Add kernel context to kernel tracer */ | |
2411 | ret = context_kernel_add(session->kernel_session, ctx, | |
2412 | event_name, channel_name); | |
2413 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2414 | goto error; |
e953ef25 | 2415 | } |
2bdd86d4 MD |
2416 | break; |
2417 | case LTTNG_DOMAIN_UST: | |
2418 | { | |
55cc08a6 | 2419 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2420 | |
55cc08a6 DG |
2421 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2422 | if (ret != LTTCOMM_OK) { | |
2423 | goto error; | |
2bdd86d4 | 2424 | } |
e953ef25 | 2425 | break; |
2bdd86d4 | 2426 | } |
d78d6610 | 2427 | #if 0 |
55cc08a6 DG |
2428 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2429 | case LTTNG_DOMAIN_UST_PID: | |
2430 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2431 | #endif |
54d01ffb | 2432 | default: |
1ab1ea0b | 2433 | ret = LTTCOMM_UND; |
54d01ffb | 2434 | goto error; |
e953ef25 | 2435 | } |
950131af | 2436 | |
54d01ffb | 2437 | ret = LTTCOMM_OK; |
950131af | 2438 | |
54d01ffb DG |
2439 | error: |
2440 | return ret; | |
2441 | } | |
2442 | ||
2443 | /* | |
2444 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2445 | */ | |
2446 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2447 | char *channel_name, struct lttng_event *event) | |
2448 | { | |
2449 | int ret; | |
f6cd6b0f | 2450 | struct lttng_channel *attr; |
48842b30 | 2451 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2452 | |
2453 | switch (domain) { | |
2454 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2455 | { |
2456 | struct ltt_kernel_channel *kchan; | |
2457 | ||
54d01ffb DG |
2458 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2459 | session->kernel_session); | |
2460 | if (kchan == NULL) { | |
f6cd6b0f DG |
2461 | attr = channel_new_default_attr(domain); |
2462 | if (attr == NULL) { | |
2463 | ret = LTTCOMM_FATAL; | |
2464 | goto error; | |
2465 | } | |
2466 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2467 | ||
54d01ffb | 2468 | /* This call will notify the kernel thread */ |
44d3bd01 | 2469 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2470 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2471 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2472 | free(attr); |
f5177a38 DG |
2473 | goto error; |
2474 | } | |
ff4d74e6 | 2475 | free(attr); |
54d01ffb | 2476 | } |
950131af | 2477 | |
54d01ffb DG |
2478 | /* Get the newly created kernel channel pointer */ |
2479 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2480 | session->kernel_session); | |
2481 | if (kchan == NULL) { | |
2482 | /* This sould not happen... */ | |
2483 | ret = LTTCOMM_FATAL; | |
2484 | goto error; | |
2485 | } | |
f5177a38 | 2486 | |
48842b30 DG |
2487 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2488 | event); | |
54d01ffb | 2489 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2490 | goto error; |
950131af DG |
2491 | } |
2492 | ||
54d01ffb | 2493 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2494 | break; |
2bdd86d4 MD |
2495 | } |
2496 | case LTTNG_DOMAIN_UST: | |
2497 | { | |
aea829b3 | 2498 | struct lttng_channel *attr; |
edb67388 | 2499 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2500 | |
edb67388 | 2501 | /* Get channel from global UST domain */ |
48842b30 DG |
2502 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2503 | channel_name); | |
2504 | if (uchan == NULL) { | |
aea829b3 DG |
2505 | /* Create default channel */ |
2506 | attr = channel_new_default_attr(domain); | |
2507 | if (attr == NULL) { | |
2508 | ret = LTTCOMM_FATAL; | |
2509 | goto error; | |
2510 | } | |
596219f7 | 2511 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2512 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2513 | |
7885e399 | 2514 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2515 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2516 | free(attr); |
aea829b3 DG |
2517 | goto error; |
2518 | } | |
aea829b3 DG |
2519 | free(attr); |
2520 | ||
2521 | /* Get the newly created channel reference back */ | |
2522 | uchan = trace_ust_find_channel_by_name( | |
2523 | usess->domain_global.channels, channel_name); | |
2524 | if (uchan == NULL) { | |
2525 | /* Something is really wrong */ | |
2526 | ret = LTTCOMM_FATAL; | |
2527 | goto error; | |
2528 | } | |
48842b30 | 2529 | } |
2bdd86d4 | 2530 | |
edb67388 | 2531 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2532 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2533 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2534 | goto error; |
2bdd86d4 MD |
2535 | } |
2536 | break; | |
2537 | } | |
d78d6610 | 2538 | #if 0 |
2bdd86d4 MD |
2539 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2540 | case LTTNG_DOMAIN_UST_PID: | |
2541 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2542 | #endif |
54d01ffb | 2543 | default: |
1ab1ea0b | 2544 | ret = LTTCOMM_UND; |
54d01ffb | 2545 | goto error; |
950131af | 2546 | } |
d36b8583 | 2547 | |
54d01ffb | 2548 | ret = LTTCOMM_OK; |
d36b8583 | 2549 | |
54d01ffb DG |
2550 | error: |
2551 | return ret; | |
2552 | } | |
7d29a247 | 2553 | |
54d01ffb DG |
2554 | /* |
2555 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2556 | */ | |
2557 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2558 | char *channel_name, int event_type) |
54d01ffb DG |
2559 | { |
2560 | int ret; | |
2561 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2562 | |
54d01ffb DG |
2563 | switch (domain) { |
2564 | case LTTNG_DOMAIN_KERNEL: | |
2565 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2566 | session->kernel_session); | |
2567 | if (kchan == NULL) { | |
2568 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2569 | ret = channel_kernel_create(session->kernel_session, NULL, |
2570 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2571 | if (ret != LTTCOMM_OK) { |
2572 | goto error; | |
d36b8583 | 2573 | } |
0d0c377a | 2574 | |
8f69e5eb DG |
2575 | /* Get the newly created kernel channel pointer */ |
2576 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2577 | session->kernel_session); | |
2578 | if (kchan == NULL) { | |
2579 | /* This sould not happen... */ | |
2580 | ret = LTTCOMM_FATAL; | |
2581 | goto error; | |
2582 | } | |
2583 | ||
54d01ffb | 2584 | } |
0fdd1e2c | 2585 | |
7a3d1328 | 2586 | switch (event_type) { |
76d45b40 | 2587 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2588 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2589 | kchan, kernel_tracer_fd); |
7a3d1328 | 2590 | break; |
76d45b40 | 2591 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2592 | /* |
7a3d1328 MD |
2593 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2594 | * events already registered to the channel. | |
8c9ae521 | 2595 | */ |
7a3d1328 MD |
2596 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2597 | kchan, kernel_tracer_fd); | |
2598 | break; | |
76d45b40 | 2599 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2600 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2601 | ret = event_kernel_enable_all(session->kernel_session, |
2602 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2603 | break; |
2604 | default: | |
2605 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2606 | goto error; | |
8c9ae521 | 2607 | } |
8f69e5eb DG |
2608 | |
2609 | /* Manage return value */ | |
54d01ffb | 2610 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2611 | goto error; |
d36b8583 DG |
2612 | } |
2613 | ||
54d01ffb | 2614 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2615 | break; |
76d45b40 DG |
2616 | case LTTNG_DOMAIN_UST: |
2617 | { | |
2618 | struct lttng_channel *attr; | |
2619 | struct ltt_ust_channel *uchan; | |
2620 | struct ltt_ust_session *usess = session->ust_session; | |
2621 | ||
2622 | /* Get channel from global UST domain */ | |
2623 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2624 | channel_name); | |
2625 | if (uchan == NULL) { | |
2626 | /* Create default channel */ | |
2627 | attr = channel_new_default_attr(domain); | |
2628 | if (attr == NULL) { | |
2629 | ret = LTTCOMM_FATAL; | |
2630 | goto error; | |
2631 | } | |
2632 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2633 | attr->name[NAME_MAX - 1] = '\0'; | |
2634 | ||
2635 | /* Use the internal command enable channel */ | |
7885e399 | 2636 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2637 | if (ret != LTTCOMM_OK) { |
2638 | free(attr); | |
2639 | goto error; | |
2640 | } | |
2641 | free(attr); | |
2642 | ||
2643 | /* Get the newly created channel reference back */ | |
2644 | uchan = trace_ust_find_channel_by_name( | |
2645 | usess->domain_global.channels, channel_name); | |
2646 | if (uchan == NULL) { | |
2647 | /* Something is really wrong */ | |
2648 | ret = LTTCOMM_FATAL; | |
2649 | goto error; | |
2650 | } | |
2651 | } | |
2652 | ||
2653 | /* At this point, the session and channel exist on the tracer */ | |
2654 | ||
2655 | switch (event_type) { | |
2656 | case LTTNG_EVENT_ALL: | |
2657 | case LTTNG_EVENT_TRACEPOINT: | |
2658 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2659 | if (ret != LTTCOMM_OK) { | |
2660 | goto error; | |
2661 | } | |
2662 | break; | |
2663 | default: | |
2664 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2665 | goto error; | |
2666 | } | |
2667 | ||
2668 | /* Manage return value */ | |
2669 | if (ret != LTTCOMM_OK) { | |
2670 | goto error; | |
2671 | } | |
2672 | ||
2673 | break; | |
2674 | } | |
d78d6610 | 2675 | #if 0 |
76d45b40 DG |
2676 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2677 | case LTTNG_DOMAIN_UST_PID: | |
2678 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2679 | #endif |
54d01ffb | 2680 | default: |
1ab1ea0b | 2681 | ret = LTTCOMM_UND; |
54d01ffb | 2682 | goto error; |
d36b8583 | 2683 | } |
f3ed775e | 2684 | |
54d01ffb DG |
2685 | ret = LTTCOMM_OK; |
2686 | ||
2687 | error: | |
2688 | return ret; | |
2689 | } | |
2690 | ||
2691 | /* | |
2692 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2693 | */ | |
2694 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2695 | { | |
2696 | int ret; | |
2697 | ssize_t nb_events = 0; | |
2698 | ||
2699 | switch (domain) { | |
2700 | case LTTNG_DOMAIN_KERNEL: | |
2701 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2702 | if (nb_events < 0) { | |
2703 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2704 | goto error; | |
894be886 | 2705 | } |
54d01ffb | 2706 | break; |
b551a063 DG |
2707 | case LTTNG_DOMAIN_UST: |
2708 | nb_events = ust_app_list_events(events); | |
2709 | if (nb_events < 0) { | |
2710 | ret = LTTCOMM_UST_LIST_FAIL; | |
2711 | goto error; | |
2712 | } | |
2713 | break; | |
54d01ffb | 2714 | default: |
1ab1ea0b | 2715 | ret = LTTCOMM_UND; |
54d01ffb DG |
2716 | goto error; |
2717 | } | |
894be886 | 2718 | |
54d01ffb | 2719 | return nb_events; |
7d29a247 | 2720 | |
54d01ffb DG |
2721 | error: |
2722 | /* Return negative value to differentiate return code */ | |
2723 | return -ret; | |
2724 | } | |
b389abbe | 2725 | |
54d01ffb DG |
2726 | /* |
2727 | * Command LTTNG_START_TRACE processed by the client thread. | |
2728 | */ | |
2729 | static int cmd_start_trace(struct ltt_session *session) | |
2730 | { | |
2731 | int ret; | |
54d01ffb | 2732 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2733 | struct ltt_ust_session *usess; |
b389abbe | 2734 | |
54d01ffb DG |
2735 | /* Short cut */ |
2736 | ksession = session->kernel_session; | |
b9d9b220 | 2737 | usess = session->ust_session; |
5eb91c98 | 2738 | |
b9ef1c83 DG |
2739 | if (session->enabled) { |
2740 | ret = LTTCOMM_UST_START_FAIL; | |
2741 | goto error; | |
2742 | } | |
2743 | ||
464dd62d MD |
2744 | session->enabled = 1; |
2745 | ||
54d01ffb DG |
2746 | /* Kernel tracing */ |
2747 | if (ksession != NULL) { | |
2bdd86d4 MD |
2748 | struct ltt_kernel_channel *kchan; |
2749 | ||
54d01ffb DG |
2750 | /* Open kernel metadata */ |
2751 | if (ksession->metadata == NULL) { | |
2752 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2753 | if (ret < 0) { | |
2754 | ret = LTTCOMM_KERN_META_FAIL; | |
2755 | goto error; | |
b389abbe | 2756 | } |
54d01ffb | 2757 | } |
7d29a247 | 2758 | |
54d01ffb DG |
2759 | /* Open kernel metadata stream */ |
2760 | if (ksession->metadata_stream_fd == 0) { | |
2761 | ret = kernel_open_metadata_stream(ksession); | |
2762 | if (ret < 0) { | |
2763 | ERR("Kernel create metadata stream failed"); | |
2764 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2765 | goto error; | |
2766 | } | |
2767 | } | |
2768 | ||
2769 | /* For each channel */ | |
2770 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2771 | if (kchan->stream_count == 0) { | |
2772 | ret = kernel_open_channel_stream(kchan); | |
2773 | if (ret < 0) { | |
2774 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2775 | goto error; |
2776 | } | |
54d01ffb DG |
2777 | /* Update the stream global counter */ |
2778 | ksession->stream_count_global += ret; | |
7d29a247 | 2779 | } |
54d01ffb DG |
2780 | } |
2781 | ||
2782 | /* Setup kernel consumer socket and send fds to it */ | |
2783 | ret = init_kernel_tracing(ksession); | |
2784 | if (ret < 0) { | |
2785 | ret = LTTCOMM_KERN_START_FAIL; | |
2786 | goto error; | |
2787 | } | |
2788 | ||
2789 | /* This start the kernel tracing */ | |
2790 | ret = kernel_start_session(ksession); | |
2791 | if (ret < 0) { | |
2792 | ret = LTTCOMM_KERN_START_FAIL; | |
2793 | goto error; | |
2794 | } | |
2795 | ||
2796 | /* Quiescent wait after starting trace */ | |
2797 | kernel_wait_quiescent(kernel_tracer_fd); | |
2798 | } | |
2799 | ||
36dc12cc | 2800 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2801 | if (usess) { |
2802 | usess->start_trace = 1; | |
36dc12cc | 2803 | |
b9d9b220 DG |
2804 | ret = ust_app_start_trace_all(usess); |
2805 | if (ret < 0) { | |
2806 | ret = LTTCOMM_UST_START_FAIL; | |
2807 | goto error; | |
2808 | } | |
2bdd86d4 | 2809 | } |
54d01ffb DG |
2810 | |
2811 | ret = LTTCOMM_OK; | |
2812 | ||
2813 | error: | |
2814 | return ret; | |
2815 | } | |
2816 | ||
2817 | /* | |
2818 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2819 | */ | |
2820 | static int cmd_stop_trace(struct ltt_session *session) | |
2821 | { | |
2822 | int ret; | |
2823 | struct ltt_kernel_channel *kchan; | |
2824 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2825 | struct ltt_ust_session *usess; |
54d01ffb DG |
2826 | |
2827 | /* Short cut */ | |
2828 | ksession = session->kernel_session; | |
8be98f9a | 2829 | usess = session->ust_session; |
54d01ffb | 2830 | |
b9ef1c83 | 2831 | if (!session->enabled) { |
190df5ac | 2832 | ret = LTTCOMM_UST_STOP_FAIL; |
b9ef1c83 DG |
2833 | goto error; |
2834 | } | |
2835 | ||
464dd62d MD |
2836 | session->enabled = 0; |
2837 | ||
54d01ffb DG |
2838 | /* Kernel tracer */ |
2839 | if (ksession != NULL) { | |
2840 | DBG("Stop kernel tracing"); | |
2841 | ||
2842 | /* Flush all buffers before stopping */ | |
2843 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2844 | if (ret < 0) { | |
2845 | ERR("Kernel metadata flush failed"); | |
2846 | } | |
f34daff7 | 2847 | |
54d01ffb DG |
2848 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2849 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2850 | if (ret < 0) { |
54d01ffb | 2851 | ERR("Kernel flush buffer error"); |
7d29a247 | 2852 | } |
54d01ffb | 2853 | } |
19e70852 | 2854 | |
54d01ffb DG |
2855 | ret = kernel_stop_session(ksession); |
2856 | if (ret < 0) { | |
2857 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2858 | goto error; |
f3ed775e | 2859 | } |
54d01ffb DG |
2860 | |
2861 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2862 | } |
54d01ffb | 2863 | |
8be98f9a MD |
2864 | if (usess) { |
2865 | usess->start_trace = 0; | |
2bdd86d4 | 2866 | |
8be98f9a | 2867 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2868 | if (ret < 0) { |
190df5ac | 2869 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2870 | goto error; |
2871 | } | |
2bdd86d4 | 2872 | } |
54d01ffb DG |
2873 | |
2874 | ret = LTTCOMM_OK; | |
2875 | ||
2876 | error: | |
2877 | return ret; | |
2878 | } | |
2879 | ||
2880 | /* | |
2881 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2882 | */ | |
730389d9 | 2883 | static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds) |
54d01ffb DG |
2884 | { |
2885 | int ret; | |
2886 | ||
730389d9 DG |
2887 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
2888 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb DG |
2889 | if (ret != LTTCOMM_OK) { |
2890 | goto error; | |
2891 | } | |
2892 | ||
2893 | ret = LTTCOMM_OK; | |
2894 | ||
2895 | error: | |
2896 | return ret; | |
2897 | } | |
2898 | ||
2899 | /* | |
2900 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2901 | */ | |
2902 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2903 | { | |
2904 | int ret; | |
2905 | ||
2906 | /* Clean kernel session teardown */ | |
2907 | teardown_kernel_session(session); | |
84cd17c6 MD |
2908 | /* UST session teardown */ |
2909 | teardown_ust_session(session); | |
54d01ffb DG |
2910 | |
2911 | /* | |
2912 | * Must notify the kernel thread here to update it's poll setin order | |
2913 | * to remove the channel(s)' fd just destroyed. | |
2914 | */ | |
2915 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2916 | if (ret < 0) { | |
2917 | perror("write kernel poll pipe"); | |
2918 | } | |
2919 | ||
271933a4 | 2920 | ret = session_destroy(session); |
54d01ffb DG |
2921 | |
2922 | return ret; | |
2923 | } | |
2924 | ||
2925 | /* | |
2926 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2927 | */ | |
2928 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2929 | { | |
2930 | int ret; | |
2931 | ||
2932 | switch (domain) { | |
2933 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2934 | { |
54d01ffb | 2935 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2936 | |
54d01ffb DG |
2937 | kcalibrate.type = calibrate->type; |
2938 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2939 | if (ret < 0) { |
54d01ffb DG |
2940 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2941 | goto error; | |
33a2b854 | 2942 | } |
54d01ffb DG |
2943 | break; |
2944 | } | |
4466912f DG |
2945 | case LTTNG_DOMAIN_UST: |
2946 | { | |
2947 | struct lttng_ust_calibrate ucalibrate; | |
2948 | ||
2949 | ucalibrate.type = calibrate->type; | |
2950 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2951 | if (ret < 0) { | |
2952 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
2953 | goto error; | |
2954 | } | |
2955 | break; | |
2956 | } | |
54d01ffb | 2957 | default: |
1ab1ea0b | 2958 | ret = LTTCOMM_UND; |
54d01ffb DG |
2959 | goto error; |
2960 | } | |
33a2b854 | 2961 | |
54d01ffb | 2962 | ret = LTTCOMM_OK; |
33a2b854 | 2963 | |
54d01ffb DG |
2964 | error: |
2965 | return ret; | |
2966 | } | |
7d29a247 | 2967 | |
54d01ffb DG |
2968 | /* |
2969 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2970 | */ | |
2971 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
2972 | char *sock_path) | |
2973 | { | |
2974 | int ret, sock; | |
b389abbe | 2975 | |
54d01ffb DG |
2976 | switch (domain) { |
2977 | case LTTNG_DOMAIN_KERNEL: | |
2978 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 2979 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
2980 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
2981 | goto error; | |
2982 | } | |
2983 | ||
2984 | sock = lttcomm_connect_unix_sock(sock_path); | |
2985 | if (sock < 0) { | |
2986 | ret = LTTCOMM_CONNECT_FAIL; | |
2987 | goto error; | |
2988 | } | |
2989 | ||
2990 | session->kernel_session->consumer_fd = sock; | |
2991 | break; | |
2992 | default: | |
2993 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 2994 | ret = LTTCOMM_UND; |
54d01ffb DG |
2995 | goto error; |
2996 | } | |
2997 | ||
2998 | ret = LTTCOMM_OK; | |
2999 | ||
3000 | error: | |
3001 | return ret; | |
3002 | } | |
3003 | ||
3004 | /* | |
3005 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3006 | */ | |
3007 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3008 | struct lttng_domain **domains) | |
3009 | { | |
b551a063 | 3010 | int ret, index = 0; |
54d01ffb DG |
3011 | ssize_t nb_dom = 0; |
3012 | ||
3013 | if (session->kernel_session != NULL) { | |
b551a063 | 3014 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3015 | nb_dom++; |
3016 | } | |
3017 | ||
b551a063 DG |
3018 | if (session->ust_session != NULL) { |
3019 | DBG3("Listing domains found UST global domain"); | |
3020 | nb_dom++; | |
3021 | } | |
54d01ffb | 3022 | |
b551a063 | 3023 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3024 | if (*domains == NULL) { |
3025 | ret = -LTTCOMM_FATAL; | |
3026 | goto error; | |
3027 | } | |
3028 | ||
b551a063 DG |
3029 | if (session->kernel_session != NULL) { |
3030 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3031 | index++; | |
3032 | } | |
3033 | ||
3034 | if (session->ust_session != NULL) { | |
3035 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3036 | index++; | |
3037 | } | |
54d01ffb | 3038 | |
54d01ffb DG |
3039 | return nb_dom; |
3040 | ||
3041 | error: | |
3042 | return ret; | |
3043 | } | |
3044 | ||
3045 | /* | |
3046 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3047 | */ | |
b551a063 | 3048 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3049 | struct lttng_channel **channels) |
3050 | { | |
3051 | int ret; | |
3052 | ssize_t nb_chan = 0; | |
3053 | ||
b551a063 DG |
3054 | switch (domain) { |
3055 | case LTTNG_DOMAIN_KERNEL: | |
3056 | if (session->kernel_session != NULL) { | |
3057 | nb_chan = session->kernel_session->channel_count; | |
3058 | } | |
0df502fd | 3059 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3060 | break; |
3061 | case LTTNG_DOMAIN_UST: | |
3062 | if (session->ust_session != NULL) { | |
bec39940 | 3063 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3064 | session->ust_session->domain_global.channels); |
3065 | } | |
0df502fd | 3066 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3067 | break; |
3068 | default: | |
3069 | *channels = NULL; | |
1ab1ea0b | 3070 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3071 | goto error; |
3072 | } | |
3073 | ||
b551a063 DG |
3074 | if (nb_chan > 0) { |
3075 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3076 | if (*channels == NULL) { | |
3077 | ret = -LTTCOMM_FATAL; | |
3078 | goto error; | |
3079 | } | |
54d01ffb | 3080 | |
b551a063 DG |
3081 | list_lttng_channels(domain, session, *channels); |
3082 | } else { | |
3083 | *channels = NULL; | |
3084 | } | |
2bdd86d4 | 3085 | |
54d01ffb DG |
3086 | return nb_chan; |
3087 | ||
3088 | error: | |
3089 | return ret; | |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3094 | */ | |
b551a063 | 3095 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3096 | char *channel_name, struct lttng_event **events) |
3097 | { | |
b551a063 | 3098 | int ret = 0; |
54d01ffb | 3099 | ssize_t nb_event = 0; |
54d01ffb | 3100 | |
b551a063 DG |
3101 | switch (domain) { |
3102 | case LTTNG_DOMAIN_KERNEL: | |
3103 | if (session->kernel_session != NULL) { | |
3104 | nb_event = list_lttng_kernel_events(channel_name, | |
3105 | session->kernel_session, events); | |
54d01ffb | 3106 | } |
b551a063 DG |
3107 | break; |
3108 | case LTTNG_DOMAIN_UST: | |
3109 | { | |
3110 | if (session->ust_session != NULL) { | |
3111 | nb_event = list_lttng_ust_global_events(channel_name, | |
3112 | &session->ust_session->domain_global, events); | |
3113 | } | |
3114 | break; | |
54d01ffb | 3115 | } |
b551a063 | 3116 | default: |
1ab1ea0b | 3117 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3118 | goto error; |
3119 | } | |
3120 | ||
b551a063 | 3121 | ret = nb_event; |
54d01ffb DG |
3122 | |
3123 | error: | |
3124 | return ret; | |
3125 | } | |
3126 | ||
3127 | /* | |
3128 | * Process the command requested by the lttng client within the command | |
3129 | * context structure. This function make sure that the return structure (llm) | |
3130 | * is set and ready for transmission before returning. | |
3131 | * | |
3132 | * Return any error encountered or 0 for success. | |
3133 | */ | |
3134 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3135 | { | |
3136 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3137 | int need_tracing_session = 1; |
2e09ba09 | 3138 | int need_domain; |
54d01ffb DG |
3139 | |
3140 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3141 | ||
2e09ba09 MD |
3142 | switch (cmd_ctx->lsm->cmd_type) { |
3143 | case LTTNG_CREATE_SESSION: | |
3144 | case LTTNG_DESTROY_SESSION: | |
3145 | case LTTNG_LIST_SESSIONS: | |
3146 | case LTTNG_LIST_DOMAINS: | |
3147 | case LTTNG_START_TRACE: | |
3148 | case LTTNG_STOP_TRACE: | |
3149 | need_domain = 0; | |
3aace903 | 3150 | break; |
2e09ba09 MD |
3151 | default: |
3152 | need_domain = 1; | |
3153 | } | |
3154 | ||
3155 | if (opt_no_kernel && need_domain | |
3156 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
4fba7219 DG |
3157 | ret = LTTCOMM_KERN_NA; |
3158 | goto error; | |
3159 | } | |
3160 | ||
54d01ffb DG |
3161 | /* |
3162 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3163 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3164 | * command. |
3165 | */ | |
3166 | switch(cmd_ctx->lsm->cmd_type) { | |
3167 | case LTTNG_LIST_SESSIONS: | |
3168 | case LTTNG_LIST_TRACEPOINTS: | |
3169 | case LTTNG_LIST_DOMAINS: | |
3170 | case LTTNG_LIST_CHANNELS: | |
3171 | case LTTNG_LIST_EVENTS: | |
3172 | break; | |
3173 | default: | |
3174 | /* Setup lttng message with no payload */ | |
3175 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3176 | if (ret < 0) { | |
3177 | /* This label does not try to unlock the session */ | |
3178 | goto init_setup_error; | |
3179 | } | |
3180 | } | |
3181 | ||
3182 | /* Commands that DO NOT need a session. */ | |
3183 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3184 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 3185 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3186 | case LTTNG_LIST_SESSIONS: |
3187 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3188 | need_tracing_session = 0; |
54d01ffb DG |
3189 | break; |
3190 | default: | |
3191 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3192 | session_lock_list(); |
54d01ffb | 3193 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3194 | session_unlock_list(); |
54d01ffb DG |
3195 | if (cmd_ctx->session == NULL) { |
3196 | if (cmd_ctx->lsm->session.name != NULL) { | |
3197 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3198 | } else { | |
3199 | /* If no session name specified */ | |
3200 | ret = LTTCOMM_SELECT_SESS; | |
3201 | } | |
3202 | goto error; | |
3203 | } else { | |
3204 | /* Acquire lock for the session */ | |
3205 | session_lock(cmd_ctx->session); | |
3206 | } | |
3207 | break; | |
3208 | } | |
b389abbe | 3209 | |
2e09ba09 MD |
3210 | if (!need_domain) { |
3211 | goto skip_domain; | |
3212 | } | |
54d01ffb DG |
3213 | /* |
3214 | * Check domain type for specific "pre-action". | |
3215 | */ | |
3216 | switch (cmd_ctx->lsm->domain.type) { | |
3217 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 DG |
3218 | if (!is_root) { |
3219 | ret = LTTCOMM_KERN_NA; | |
3220 | goto error; | |
3221 | } | |
3222 | ||
54d01ffb DG |
3223 | /* Kernel tracer check */ |
3224 | if (kernel_tracer_fd == 0) { | |
3225 | /* Basically, load kernel tracer modules */ | |
096102bd DG |
3226 | ret = init_kernel_tracer(); |
3227 | if (ret != 0) { | |
54d01ffb DG |
3228 | goto error; |
3229 | } | |
3230 | } | |
5eb91c98 | 3231 | |
54d01ffb | 3232 | /* Need a session for kernel command */ |
44d3bd01 | 3233 | if (need_tracing_session) { |
54d01ffb | 3234 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3235 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3236 | if (ret < 0) { |
54d01ffb | 3237 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3238 | goto error; |
3239 | } | |
b389abbe | 3240 | } |
7d29a247 | 3241 | |
54d01ffb | 3242 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3243 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3244 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3245 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3246 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3247 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3248 | if (ret < 0) { |
54d01ffb DG |
3249 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3250 | goto error; | |
950131af | 3251 | } |
3ff2ecac MD |
3252 | } else { |
3253 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3254 | } |
0d0c377a | 3255 | } |
54d01ffb | 3256 | break; |
2bdd86d4 | 3257 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3258 | { |
44d3bd01 | 3259 | if (need_tracing_session) { |
f6a9efaa | 3260 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3261 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3262 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3263 | if (ret != LTTCOMM_OK) { |
3264 | goto error; | |
3265 | } | |
3266 | } | |
7753dea8 MD |
3267 | /* Start the UST consumer daemons */ |
3268 | /* 64-bit */ | |
3269 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3270 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3271 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3272 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3273 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3274 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3275 | if (ret < 0) { |
7753dea8 MD |
3276 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3277 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3278 | goto error; |
3279 | } | |
48842b30 | 3280 | |
7753dea8 | 3281 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3282 | } else { |
7753dea8 MD |
3283 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3284 | } | |
3285 | /* 32-bit */ | |
fc7a59ce | 3286 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3287 | ustconsumer32_data.pid == 0 && |
3288 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3289 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3290 | ret = start_consumerd(&ustconsumer32_data); | |
3291 | if (ret < 0) { | |
3292 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3293 | ust_consumerd32_fd = -EINVAL; | |
3294 | goto error; | |
3295 | } | |
3296 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3297 | } else { | |
3298 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3299 | } |
44d3bd01 DG |
3300 | } |
3301 | break; | |
48842b30 | 3302 | } |
54d01ffb | 3303 | default: |
54d01ffb DG |
3304 | break; |
3305 | } | |
2e09ba09 | 3306 | skip_domain: |
33a2b854 | 3307 | |
8e0af1b4 MD |
3308 | /* |
3309 | * Check that the UID or GID match that of the tracing session. | |
3310 | * The root user can interact with all sessions. | |
3311 | */ | |
3312 | if (need_tracing_session) { | |
3313 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3314 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3315 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
3316 | ret = LTTCOMM_EPERM; |
3317 | goto error; | |
3318 | } | |
3319 | } | |
3320 | ||
54d01ffb DG |
3321 | /* Process by command type */ |
3322 | switch (cmd_ctx->lsm->cmd_type) { | |
3323 | case LTTNG_ADD_CONTEXT: | |
3324 | { | |
3325 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3326 | cmd_ctx->lsm->u.context.channel_name, | |
3327 | cmd_ctx->lsm->u.context.event_name, | |
3328 | &cmd_ctx->lsm->u.context.ctx); | |
3329 | break; | |
3330 | } | |
3331 | case LTTNG_DISABLE_CHANNEL: | |
3332 | { | |
3333 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3334 | cmd_ctx->lsm->u.disable.channel_name); | |
3335 | break; | |
3336 | } | |
3337 | case LTTNG_DISABLE_EVENT: | |
3338 | { | |
3339 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3340 | cmd_ctx->lsm->u.disable.channel_name, | |
3341 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3342 | break; |
3343 | } | |
54d01ffb DG |
3344 | case LTTNG_DISABLE_ALL_EVENT: |
3345 | { | |
2bdd86d4 | 3346 | DBG("Disabling all events"); |
54d01ffb DG |
3347 | |
3348 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3349 | cmd_ctx->lsm->u.disable.channel_name); | |
3350 | break; | |
3351 | } | |
3352 | case LTTNG_ENABLE_CHANNEL: | |
3353 | { | |
aea829b3 | 3354 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3355 | &cmd_ctx->lsm->u.channel.chan); |
3356 | break; | |
3357 | } | |
3358 | case LTTNG_ENABLE_EVENT: | |
3359 | { | |
3360 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3361 | cmd_ctx->lsm->u.enable.channel_name, | |
3362 | &cmd_ctx->lsm->u.enable.event); | |
3363 | break; | |
3364 | } | |
3365 | case LTTNG_ENABLE_ALL_EVENT: | |
3366 | { | |
2bdd86d4 | 3367 | DBG("Enabling all events"); |
54d01ffb DG |
3368 | |
3369 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3370 | cmd_ctx->lsm->u.enable.channel_name, |
3371 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3372 | break; |
3373 | } | |
052da939 | 3374 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3375 | { |
9f19cc17 | 3376 | struct lttng_event *events; |
54d01ffb | 3377 | ssize_t nb_events; |
052da939 | 3378 | |
54d01ffb DG |
3379 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3380 | if (nb_events < 0) { | |
3381 | ret = -nb_events; | |
3382 | goto error; | |
2ef84c95 DG |
3383 | } |
3384 | ||
3385 | /* | |
3386 | * Setup lttng message with payload size set to the event list size in | |
3387 | * bytes and then copy list into the llm payload. | |
3388 | */ | |
052da939 | 3389 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3390 | if (ret < 0) { |
052da939 | 3391 | free(events); |
2ef84c95 DG |
3392 | goto setup_error; |
3393 | } | |
3394 | ||
3395 | /* Copy event list into message payload */ | |
9f19cc17 | 3396 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3397 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3398 | |
9f19cc17 | 3399 | free(events); |
2ef84c95 DG |
3400 | |
3401 | ret = LTTCOMM_OK; | |
3402 | break; | |
3403 | } | |
f3ed775e | 3404 | case LTTNG_START_TRACE: |
8c0faa1d | 3405 | { |
54d01ffb | 3406 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3407 | break; |
3408 | } | |
f3ed775e | 3409 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3410 | { |
54d01ffb | 3411 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3412 | break; |
3413 | } | |
5e16da05 MD |
3414 | case LTTNG_CREATE_SESSION: |
3415 | { | |
54d01ffb | 3416 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3417 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3418 | break; |
3419 | } | |
3420 | case LTTNG_DESTROY_SESSION: | |
3421 | { | |
54d01ffb DG |
3422 | ret = cmd_destroy_session(cmd_ctx->session, |
3423 | cmd_ctx->lsm->session.name); | |
5461b305 | 3424 | break; |
5e16da05 | 3425 | } |
9f19cc17 | 3426 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3427 | { |
54d01ffb DG |
3428 | ssize_t nb_dom; |
3429 | struct lttng_domain *domains; | |
5461b305 | 3430 | |
54d01ffb DG |
3431 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3432 | if (nb_dom < 0) { | |
3433 | ret = -nb_dom; | |
3434 | goto error; | |
ce3d728c | 3435 | } |
520ff687 | 3436 | |
54d01ffb | 3437 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3438 | if (ret < 0) { |
3439 | goto setup_error; | |
520ff687 | 3440 | } |
57167058 | 3441 | |
54d01ffb DG |
3442 | /* Copy event list into message payload */ |
3443 | memcpy(cmd_ctx->llm->payload, domains, | |
3444 | nb_dom * sizeof(struct lttng_domain)); | |
3445 | ||
3446 | free(domains); | |
5e16da05 | 3447 | |
5461b305 | 3448 | ret = LTTCOMM_OK; |
5e16da05 MD |
3449 | break; |
3450 | } | |
9f19cc17 | 3451 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3452 | { |
54d01ffb DG |
3453 | size_t nb_chan; |
3454 | struct lttng_channel *channels; | |
3455 | ||
b551a063 DG |
3456 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3457 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3458 | if (nb_chan < 0) { |
3459 | ret = -nb_chan; | |
3460 | goto error; | |
5461b305 | 3461 | } |
ca95a216 | 3462 | |
54d01ffb | 3463 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3464 | if (ret < 0) { |
3465 | goto setup_error; | |
3466 | } | |
9f19cc17 | 3467 | |
54d01ffb DG |
3468 | /* Copy event list into message payload */ |
3469 | memcpy(cmd_ctx->llm->payload, channels, | |
3470 | nb_chan * sizeof(struct lttng_channel)); | |
3471 | ||
3472 | free(channels); | |
9f19cc17 DG |
3473 | |
3474 | ret = LTTCOMM_OK; | |
5461b305 | 3475 | break; |
5e16da05 | 3476 | } |
9f19cc17 | 3477 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3478 | { |
b551a063 | 3479 | ssize_t nb_event; |
684d34d2 | 3480 | struct lttng_event *events = NULL; |
9f19cc17 | 3481 | |
b551a063 | 3482 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3483 | cmd_ctx->lsm->u.list.channel_name, &events); |
3484 | if (nb_event < 0) { | |
3485 | ret = -nb_event; | |
3486 | goto error; | |
5461b305 | 3487 | } |
ca95a216 | 3488 | |
54d01ffb | 3489 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3490 | if (ret < 0) { |
3491 | goto setup_error; | |
3492 | } | |
9f19cc17 | 3493 | |
54d01ffb DG |
3494 | /* Copy event list into message payload */ |
3495 | memcpy(cmd_ctx->llm->payload, events, | |
3496 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3497 | |
54d01ffb | 3498 | free(events); |
9f19cc17 DG |
3499 | |
3500 | ret = LTTCOMM_OK; | |
5461b305 | 3501 | break; |
5e16da05 MD |
3502 | } |
3503 | case LTTNG_LIST_SESSIONS: | |
3504 | { | |
8e0af1b4 | 3505 | unsigned int nr_sessions; |
5461b305 | 3506 | |
8e0af1b4 | 3507 | session_lock_list(); |
730389d9 DG |
3508 | nr_sessions = lttng_sessions_count( |
3509 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3510 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3511 | |
8e0af1b4 | 3512 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3513 | if (ret < 0) { |
54d01ffb | 3514 | session_unlock_list(); |
5461b305 | 3515 | goto setup_error; |
e065084a | 3516 | } |
5e16da05 | 3517 | |
6c9cc2ab | 3518 | /* Filled the session array */ |
8e0af1b4 | 3519 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3520 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3521 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3522 | |
54d01ffb | 3523 | session_unlock_list(); |
5e16da05 | 3524 | |
5461b305 | 3525 | ret = LTTCOMM_OK; |
5e16da05 MD |
3526 | break; |
3527 | } | |
d0254c7c MD |
3528 | case LTTNG_CALIBRATE: |
3529 | { | |
54d01ffb DG |
3530 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3531 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3532 | break; |
3533 | } | |
d9800920 DG |
3534 | case LTTNG_REGISTER_CONSUMER: |
3535 | { | |
54d01ffb DG |
3536 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3537 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3538 | break; |
3539 | } | |
5e16da05 | 3540 | default: |
5e16da05 | 3541 | ret = LTTCOMM_UND; |
5461b305 | 3542 | break; |
fac6795d DG |
3543 | } |
3544 | ||
5461b305 | 3545 | error: |
5461b305 DG |
3546 | if (cmd_ctx->llm == NULL) { |
3547 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3548 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3549 | goto setup_error; |
3550 | } | |
3551 | } | |
54d01ffb | 3552 | /* Set return code */ |
5461b305 | 3553 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3554 | setup_error: |
b5541356 | 3555 | if (cmd_ctx->session) { |
54d01ffb | 3556 | session_unlock(cmd_ctx->session); |
b5541356 | 3557 | } |
54d01ffb | 3558 | init_setup_error: |
8028d920 | 3559 | return ret; |
fac6795d DG |
3560 | } |
3561 | ||
1d4b027a | 3562 | /* |
d063d709 DG |
3563 | * This thread manage all clients request using the unix client socket for |
3564 | * communication. | |
1d4b027a DG |
3565 | */ |
3566 | static void *thread_manage_clients(void *data) | |
3567 | { | |
5eb91c98 DG |
3568 | int sock = 0, ret, i, pollfd; |
3569 | uint32_t revents, nb_fd; | |
273ea72c | 3570 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3571 | struct lttng_poll_event events; |
1d4b027a DG |
3572 | |
3573 | DBG("[thread] Manage client started"); | |
3574 | ||
f6a9efaa DG |
3575 | rcu_register_thread(); |
3576 | ||
1d4b027a DG |
3577 | ret = lttcomm_listen_unix_sock(client_sock); |
3578 | if (ret < 0) { | |
3579 | goto error; | |
3580 | } | |
3581 | ||
5eb91c98 DG |
3582 | /* |
3583 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3584 | * more will be added to this poll set. | |
3585 | */ | |
3586 | ret = create_thread_poll_set(&events, 2); | |
3587 | if (ret < 0) { | |
3588 | goto error; | |
3589 | } | |
273ea72c | 3590 | |
5eb91c98 DG |
3591 | /* Add the application registration socket */ |
3592 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3593 | if (ret < 0) { | |
3594 | goto error; | |
3595 | } | |
273ea72c | 3596 | |
bbd973c2 DG |
3597 | /* |
3598 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3599 | */ |
3600 | if (opt_sig_parent) { | |
8db8d1dc | 3601 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3602 | } |
3603 | ||
3604 | while (1) { | |
1d4b027a | 3605 | DBG("Accepting client command ..."); |
273ea72c | 3606 | |
5eb91c98 DG |
3607 | nb_fd = LTTNG_POLL_GETNB(&events); |
3608 | ||
273ea72c | 3609 | /* Inifinite blocking call, waiting for transmission */ |
5eb91c98 | 3610 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3611 | if (ret < 0) { |
273ea72c DG |
3612 | goto error; |
3613 | } | |
3614 | ||
5eb91c98 DG |
3615 | for (i = 0; i < nb_fd; i++) { |
3616 | /* Fetch once the poll data */ | |
3617 | revents = LTTNG_POLL_GETEV(&events, i); | |
3618 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3619 | ||
3620 | /* Thread quit pipe has been closed. Killing thread. */ | |
3621 | ret = check_thread_quit_pipe(pollfd, revents); | |
3622 | if (ret) { | |
3623 | goto error; | |
3624 | } | |
3625 | ||
3626 | /* Event on the registration socket */ | |
3627 | if (pollfd == client_sock) { | |
3628 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3629 | ERR("Client socket poll error"); | |
3630 | goto error; | |
3631 | } | |
3632 | } | |
3633 | } | |
3634 | ||
3635 | DBG("Wait for client response"); | |
3636 | ||
3637 | sock = lttcomm_accept_unix_sock(client_sock); | |
3638 | if (sock < 0) { | |
273ea72c | 3639 | goto error; |
273ea72c DG |
3640 | } |
3641 | ||
be040666 DG |
3642 | /* Set socket option for credentials retrieval */ |
3643 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3644 | if (ret < 0) { | |
3645 | goto error; | |
3646 | } | |
3647 | ||
5eb91c98 | 3648 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3649 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3650 | if (cmd_ctx == NULL) { |
ba7f0ae5 | 3651 | perror("zmalloc cmd_ctx"); |
1d4b027a | 3652 | goto error; |
5eb91c98 | 3653 | } |
1d4b027a | 3654 | |
5eb91c98 | 3655 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3656 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3657 | if (cmd_ctx->lsm == NULL) { |
ba7f0ae5 | 3658 | perror("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3659 | goto error; |
3660 | } | |
1d4b027a | 3661 | |
5eb91c98 DG |
3662 | cmd_ctx->llm = NULL; |
3663 | cmd_ctx->session = NULL; | |
1d4b027a | 3664 | |
5eb91c98 DG |
3665 | /* |
3666 | * Data is received from the lttng client. The struct | |
3667 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3668 | * the client. | |
3669 | */ | |
3670 | DBG("Receiving data from client ..."); | |
be040666 DG |
3671 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3672 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3673 | if (ret <= 0) { |
3674 | DBG("Nothing recv() from client... continuing"); | |
3675 | close(sock); | |
3676 | free(cmd_ctx); | |
3677 | continue; | |
3678 | } | |
1d4b027a | 3679 | |
5eb91c98 DG |
3680 | // TODO: Validate cmd_ctx including sanity check for |
3681 | // security purpose. | |
f7776ea7 | 3682 | |
f6a9efaa | 3683 | rcu_thread_online(); |
5eb91c98 DG |
3684 | /* |
3685 | * This function dispatch the work to the kernel or userspace tracer | |
3686 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3687 | * informations for the client. The command context struct contains | |
3688 | * everything this function may needs. | |
3689 | */ | |
3690 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3691 | rcu_thread_offline(); |
5eb91c98 | 3692 | if (ret < 0) { |
bbd973c2 | 3693 | /* |
5eb91c98 | 3694 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3695 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3696 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3697 | */ |
bbd973c2 | 3698 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3699 | continue; |
3700 | } | |
d6e4fca4 | 3701 | |
54d01ffb DG |
3702 | DBG("Sending response (size: %d, retcode: %s)", |
3703 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3704 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3705 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3706 | if (ret < 0) { |
3707 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3708 | } |
1d4b027a | 3709 | |
5eb91c98 | 3710 | /* End of transmission */ |
273ea72c | 3711 | close(sock); |
be040666 DG |
3712 | |
3713 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3714 | } |
3715 | ||
5eb91c98 DG |
3716 | error: |
3717 | DBG("Client thread dying"); | |
273ea72c | 3718 | unlink(client_unix_sock_path); |
5eb91c98 DG |
3719 | close(client_sock); |
3720 | close(sock); | |
273ea72c | 3721 | |
5eb91c98 | 3722 | lttng_poll_clean(&events); |
a2fb29a5 | 3723 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3724 | |
3725 | rcu_unregister_thread(); | |
1d4b027a DG |
3726 | return NULL; |
3727 | } | |
3728 | ||
3729 | ||
fac6795d DG |
3730 | /* |
3731 | * usage function on stderr | |
3732 | */ | |
3733 | static void usage(void) | |
3734 | { | |
b716ce68 | 3735 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3736 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3737 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3738 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3739 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3740 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3741 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3742 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3743 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3744 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3745 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3746 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3747 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3748 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3749 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3750 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3751 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3752 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3753 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3754 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3755 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3756 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3757 | } |
3758 | ||
3759 | /* | |
3760 | * daemon argument parsing | |
3761 | */ | |
3762 | static int parse_args(int argc, char **argv) | |
3763 | { | |
3764 | int c; | |
3765 | ||
3766 | static struct option long_options[] = { | |
3767 | { "client-sock", 1, 0, 'c' }, | |
3768 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3769 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3770 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3771 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3772 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3773 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3774 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3775 | { "consumerd32-path", 1, 0, 'u' }, | |
3776 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3777 | { "consumerd64-path", 1, 0, 't' }, | |
3778 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3779 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3780 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3781 | { "help", 0, 0, 'h' }, |
3782 | { "group", 1, 0, 'g' }, | |
3783 | { "version", 0, 0, 'V' }, | |
75462a81 | 3784 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3785 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3786 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3787 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3788 | { NULL, 0, 0, 0 } |
3789 | }; | |
3790 | ||
3791 | while (1) { | |
3792 | int option_index = 0; | |
4fba7219 | 3793 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3794 | long_options, &option_index); |
fac6795d DG |
3795 | if (c == -1) { |
3796 | break; | |
3797 | } | |
3798 | ||
3799 | switch (c) { | |
3800 | case 0: | |
3801 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3802 | if (optarg) { | |
3803 | fprintf(stderr, " with arg %s\n", optarg); | |
3804 | } | |
3805 | break; | |
b716ce68 | 3806 | case 'c': |
fac6795d DG |
3807 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3808 | break; | |
3809 | case 'a': | |
3810 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3811 | break; | |
3812 | case 'd': | |
3813 | opt_daemon = 1; | |
3814 | break; | |
3815 | case 'g': | |
fb09408a | 3816 | opt_tracing_group = optarg; |
fac6795d DG |
3817 | break; |
3818 | case 'h': | |
3819 | usage(); | |
3820 | exit(EXIT_FAILURE); | |
3821 | case 'V': | |
3822 | fprintf(stdout, "%s\n", VERSION); | |
3823 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3824 | case 'S': |
3825 | opt_sig_parent = 1; | |
3826 | break; | |
d6f42150 | 3827 | case 'E': |
3bd1e081 | 3828 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3829 | break; |
3830 | case 'C': | |
3bd1e081 MD |
3831 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3832 | break; | |
3833 | case 'F': | |
7753dea8 | 3834 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3835 | break; |
3836 | case 'D': | |
7753dea8 MD |
3837 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3838 | break; | |
3839 | case 'H': | |
3840 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3841 | break; | |
3842 | case 'G': | |
3843 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3844 | break; |
4fba7219 DG |
3845 | case 'N': |
3846 | opt_no_kernel = 1; | |
3847 | break; | |
75462a81 DG |
3848 | case 'q': |
3849 | opt_quiet = 1; | |
3850 | break; | |
3f9947db | 3851 | case 'v': |
53086306 DG |
3852 | /* Verbose level can increase using multiple -v */ |
3853 | opt_verbose += 1; | |
3f9947db | 3854 | break; |
31f73cc9 | 3855 | case 'Z': |
3bd1e081 | 3856 | opt_verbose_consumer += 1; |
31f73cc9 | 3857 | break; |
fb09408a | 3858 | case 'u': |
fc7a59ce | 3859 | consumerd32_bin= optarg; |
ebaeda94 MD |
3860 | break; |
3861 | case 'U': | |
3862 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3863 | break; |
3864 | case 't': | |
fc7a59ce | 3865 | consumerd64_bin = optarg; |
ebaeda94 MD |
3866 | break; |
3867 | case 'T': | |
3868 | consumerd64_libdir = optarg; | |
fb09408a | 3869 | break; |
fac6795d DG |
3870 | default: |
3871 | /* Unknown option or other error. | |
3872 | * Error is printed by getopt, just return */ | |
3873 | return -1; | |
3874 | } | |
3875 | } | |
3876 | ||
3877 | return 0; | |
3878 | } | |
3879 | ||
3880 | /* | |
d063d709 | 3881 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3882 | * apps_sock - The communication socket for all UST apps. |
3883 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3884 | */ |
cf3af59e | 3885 | static int init_daemon_socket(void) |
fac6795d DG |
3886 | { |
3887 | int ret = 0; | |
3888 | mode_t old_umask; | |
3889 | ||
3890 | old_umask = umask(0); | |
3891 | ||
3892 | /* Create client tool unix socket */ | |
d6f42150 DG |
3893 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3894 | if (client_sock < 0) { | |
3895 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3896 | ret = -1; |
3897 | goto end; | |
3898 | } | |
3899 | ||
3900 | /* File permission MUST be 660 */ | |
3901 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3902 | if (ret < 0) { | |
d6f42150 | 3903 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
3904 | perror("chmod"); |
3905 | goto end; | |
3906 | } | |
3907 | ||
3908 | /* Create the application unix socket */ | |
d6f42150 DG |
3909 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3910 | if (apps_sock < 0) { | |
3911 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3912 | ret = -1; |
3913 | goto end; | |
3914 | } | |
3915 | ||
d6f42150 | 3916 | /* File permission MUST be 666 */ |
54d01ffb DG |
3917 | ret = chmod(apps_unix_sock_path, |
3918 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3919 | if (ret < 0) { |
d6f42150 | 3920 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
3921 | perror("chmod"); |
3922 | goto end; | |
3923 | } | |
3924 | ||
3925 | end: | |
3926 | umask(old_umask); | |
3927 | return ret; | |
3928 | } | |
3929 | ||
3930 | /* | |
54d01ffb DG |
3931 | * Check if the global socket is available, and if a daemon is answering at the |
3932 | * other side. If yes, error is returned. | |
fac6795d | 3933 | */ |
cf3af59e | 3934 | static int check_existing_daemon(void) |
fac6795d | 3935 | { |
7d8234d9 | 3936 | /* Is there anybody out there ? */ |
099e26bd | 3937 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3938 | return -EEXIST; |
099e26bd | 3939 | } |
b09c7c76 DG |
3940 | |
3941 | return 0; | |
fac6795d DG |
3942 | } |
3943 | ||
fac6795d | 3944 | /* |
d063d709 | 3945 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3946 | * |
d063d709 | 3947 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3948 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3949 | */ |
be040666 | 3950 | static int set_permissions(char *rundir) |
fac6795d DG |
3951 | { |
3952 | int ret; | |
996b65c8 | 3953 | gid_t gid; |
fac6795d | 3954 | |
996b65c8 MD |
3955 | gid = allowed_group(); |
3956 | if (gid < 0) { | |
be040666 DG |
3957 | WARN("No tracing group detected"); |
3958 | ret = 0; | |
fac6795d DG |
3959 | goto end; |
3960 | } | |
3961 | ||
d6f42150 | 3962 | /* Set lttng run dir */ |
be040666 | 3963 | ret = chown(rundir, 0, gid); |
d6f42150 | 3964 | if (ret < 0) { |
be040666 | 3965 | ERR("Unable to set group on %s", rundir); |
d6f42150 DG |
3966 | perror("chown"); |
3967 | } | |
3968 | ||
d1613cf5 JN |
3969 | /* Ensure tracing group can search the run dir */ |
3970 | ret = chmod(rundir, S_IRWXU | S_IXGRP); | |
3971 | if (ret < 0) { | |
3972 | ERR("Unable to set permissions on %s", rundir); | |
3973 | perror("chmod"); | |
3974 | } | |
3975 | ||
d6f42150 | 3976 | /* lttng client socket path */ |
996b65c8 | 3977 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3978 | if (ret < 0) { |
d6f42150 DG |
3979 | ERR("Unable to set group on %s", client_unix_sock_path); |
3980 | perror("chown"); | |
3981 | } | |
3982 | ||
3bd1e081 MD |
3983 | /* kconsumer error socket path */ |
3984 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3985 | if (ret < 0) { |
3bd1e081 MD |
3986 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
3987 | perror("chown"); | |
3988 | } | |
3989 | ||
7753dea8 MD |
3990 | /* 64-bit ustconsumer error socket path */ |
3991 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3992 | if (ret < 0) { | |
3993 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
3994 | perror("chown"); | |
3995 | } | |
3996 | ||
3997 | /* 32-bit ustconsumer compat32 error socket path */ | |
3998 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3999 | if (ret < 0) { |
7753dea8 | 4000 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
fac6795d DG |
4001 | perror("chown"); |
4002 | } | |
4003 | ||
d6f42150 | 4004 | DBG("All permissions are set"); |
e07ae692 | 4005 | |
fac6795d DG |
4006 | end: |
4007 | return ret; | |
4008 | } | |
4009 | ||
7a485870 | 4010 | /* |
d063d709 | 4011 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
4012 | */ |
4013 | static int create_kernel_poll_pipe(void) | |
4014 | { | |
730389d9 DG |
4015 | int ret, i; |
4016 | ||
4017 | ret = pipe(kernel_poll_pipe); | |
4018 | if (ret < 0) { | |
4019 | PERROR("kernel poll pipe"); | |
4020 | goto error; | |
4021 | } | |
4022 | ||
4023 | for (i = 0; i < 2; i++) { | |
4024 | ret = fcntl(kernel_poll_pipe[i], F_SETFD, FD_CLOEXEC); | |
4025 | if (ret < 0) { | |
4026 | PERROR("fcntl kernel_poll_pipe"); | |
4027 | goto error; | |
4028 | } | |
4029 | } | |
4030 | ||
4031 | error: | |
4032 | return ret; | |
7a485870 DG |
4033 | } |
4034 | ||
099e26bd DG |
4035 | /* |
4036 | * Create the application command pipe to wake thread_manage_apps. | |
4037 | */ | |
4038 | static int create_apps_cmd_pipe(void) | |
4039 | { | |
730389d9 DG |
4040 | int ret, i; |
4041 | ||
4042 | ret = pipe(apps_cmd_pipe); | |
4043 | if (ret < 0) { | |
4044 | PERROR("apps cmd pipe"); | |
4045 | goto error; | |
4046 | } | |
4047 | ||
4048 | for (i = 0; i < 2; i++) { | |
4049 | ret = fcntl(apps_cmd_pipe[i], F_SETFD, FD_CLOEXEC); | |
4050 | if (ret < 0) { | |
4051 | PERROR("fcntl apps_cmd_pipe"); | |
4052 | goto error; | |
4053 | } | |
4054 | } | |
4055 | ||
4056 | error: | |
4057 | return ret; | |
099e26bd DG |
4058 | } |
4059 | ||
d6f42150 | 4060 | /* |
d063d709 | 4061 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4062 | */ |
67e40797 | 4063 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4064 | { |
4065 | int ret; | |
4066 | ||
67e40797 DG |
4067 | DBG3("Creating LTTng run directory: %s", rundir); |
4068 | ||
d1613cf5 | 4069 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4070 | if (ret < 0) { |
b1f11e69 | 4071 | if (errno != EEXIST) { |
67e40797 | 4072 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4073 | goto error; |
4074 | } else { | |
4075 | ret = 0; | |
4076 | } | |
d6f42150 DG |
4077 | } |
4078 | ||
4079 | error: | |
4080 | return ret; | |
4081 | } | |
4082 | ||
4083 | /* | |
d063d709 DG |
4084 | * Setup sockets and directory needed by the kconsumerd communication with the |
4085 | * session daemon. | |
d6f42150 | 4086 | */ |
67e40797 DG |
4087 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4088 | const char *rundir) | |
d6f42150 DG |
4089 | { |
4090 | int ret; | |
67e40797 | 4091 | char path[PATH_MAX]; |
d6f42150 | 4092 | |
67e40797 | 4093 | switch (consumer_data->type) { |
7753dea8 | 4094 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4095 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4096 | break; |
4097 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4098 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4099 | break; |
4100 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4101 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4102 | break; |
4103 | default: | |
4104 | ERR("Consumer type unknown"); | |
4105 | ret = -EINVAL; | |
4106 | goto error; | |
d6f42150 DG |
4107 | } |
4108 | ||
67e40797 DG |
4109 | DBG2("Creating consumer directory: %s", path); |
4110 | ||
d1613cf5 | 4111 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4112 | if (ret < 0) { |
6beb2242 | 4113 | if (errno != EEXIST) { |
3bd1e081 | 4114 | ERR("Failed to create %s", path); |
6beb2242 DG |
4115 | goto error; |
4116 | } | |
4117 | ret = 0; | |
d6f42150 DG |
4118 | } |
4119 | ||
4120 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4121 | consumer_data->err_sock = |
4122 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4123 | if (consumer_data->err_sock < 0) { | |
4124 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4125 | ret = -1; |
4126 | goto error; | |
4127 | } | |
4128 | ||
4129 | /* File permission MUST be 660 */ | |
3bd1e081 | 4130 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4131 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4132 | if (ret < 0) { |
3bd1e081 | 4133 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4134 | PERROR("chmod"); |
d6f42150 DG |
4135 | goto error; |
4136 | } | |
4137 | ||
4138 | error: | |
4139 | return ret; | |
4140 | } | |
4141 | ||
fac6795d | 4142 | /* |
d063d709 | 4143 | * Signal handler for the daemon |
cf3af59e | 4144 | * |
54d01ffb DG |
4145 | * Simply stop all worker threads, leaving main() return gracefully after |
4146 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4147 | */ |
4148 | static void sighandler(int sig) | |
4149 | { | |
4150 | switch (sig) { | |
cf3af59e | 4151 | case SIGPIPE: |
af87c45a | 4152 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4153 | return; |
4154 | case SIGINT: | |
af87c45a | 4155 | DBG("SIGINT caught"); |
cf3af59e MD |
4156 | stop_threads(); |
4157 | break; | |
4158 | case SIGTERM: | |
af87c45a | 4159 | DBG("SIGTERM caught"); |
cf3af59e MD |
4160 | stop_threads(); |
4161 | break; | |
4162 | default: | |
4163 | break; | |
fac6795d | 4164 | } |
fac6795d DG |
4165 | } |
4166 | ||
4167 | /* | |
d063d709 | 4168 | * Setup signal handler for : |
1d4b027a | 4169 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4170 | */ |
1d4b027a | 4171 | static int set_signal_handler(void) |
fac6795d | 4172 | { |
1d4b027a DG |
4173 | int ret = 0; |
4174 | struct sigaction sa; | |
4175 | sigset_t sigset; | |
fac6795d | 4176 | |
1d4b027a DG |
4177 | if ((ret = sigemptyset(&sigset)) < 0) { |
4178 | perror("sigemptyset"); | |
4179 | return ret; | |
4180 | } | |
d6f42150 | 4181 | |
1d4b027a DG |
4182 | sa.sa_handler = sighandler; |
4183 | sa.sa_mask = sigset; | |
4184 | sa.sa_flags = 0; | |
4185 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
4186 | perror("sigaction"); | |
4187 | return ret; | |
d6f42150 DG |
4188 | } |
4189 | ||
1d4b027a DG |
4190 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
4191 | perror("sigaction"); | |
4192 | return ret; | |
d6f42150 | 4193 | } |
aaf26714 | 4194 | |
1d4b027a DG |
4195 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
4196 | perror("sigaction"); | |
4197 | return ret; | |
8c0faa1d DG |
4198 | } |
4199 | ||
1d4b027a DG |
4200 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4201 | ||
4202 | return ret; | |
fac6795d DG |
4203 | } |
4204 | ||
f3ed775e | 4205 | /* |
d063d709 DG |
4206 | * Set open files limit to unlimited. This daemon can open a large number of |
4207 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4208 | */ |
4209 | static void set_ulimit(void) | |
4210 | { | |
4211 | int ret; | |
4212 | struct rlimit lim; | |
4213 | ||
a88df331 | 4214 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4215 | lim.rlim_cur = 65535; |
4216 | lim.rlim_max = 65535; | |
4217 | ||
4218 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4219 | if (ret < 0) { | |
4220 | perror("failed to set open files limit"); | |
4221 | } | |
4222 | } | |
4223 | ||
fac6795d DG |
4224 | /* |
4225 | * main | |
4226 | */ | |
4227 | int main(int argc, char **argv) | |
4228 | { | |
fac6795d DG |
4229 | int ret = 0; |
4230 | void *status; | |
b082db07 | 4231 | const char *home_path; |
fac6795d | 4232 | |
335a95b7 MD |
4233 | init_kernel_workarounds(); |
4234 | ||
f6a9efaa DG |
4235 | rcu_register_thread(); |
4236 | ||
273ea72c | 4237 | /* Create thread quit pipe */ |
cf3af59e MD |
4238 | if ((ret = init_thread_quit_pipe()) < 0) { |
4239 | goto error; | |
273ea72c DG |
4240 | } |
4241 | ||
7753dea8 | 4242 | setup_consumerd_path(); |
fb09408a | 4243 | |
fac6795d DG |
4244 | /* Parse arguments */ |
4245 | progname = argv[0]; | |
4246 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4247 | goto error; |
fac6795d DG |
4248 | } |
4249 | ||
4250 | /* Daemonize */ | |
4251 | if (opt_daemon) { | |
53094c05 DG |
4252 | ret = daemon(0, 0); |
4253 | if (ret < 0) { | |
4254 | perror("daemon"); | |
cf3af59e | 4255 | goto error; |
53094c05 | 4256 | } |
fac6795d DG |
4257 | } |
4258 | ||
4259 | /* Check if daemon is UID = 0 */ | |
4260 | is_root = !getuid(); | |
4261 | ||
fac6795d | 4262 | if (is_root) { |
990570ed | 4263 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4264 | |
4265 | /* Create global run dir with root access */ | |
4266 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4267 | if (ret < 0) { |
cf3af59e | 4268 | goto error; |
d6f42150 DG |
4269 | } |
4270 | ||
fac6795d | 4271 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4272 | snprintf(apps_unix_sock_path, PATH_MAX, |
4273 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4274 | } |
4275 | ||
4276 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4277 | snprintf(client_unix_sock_path, PATH_MAX, |
4278 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4279 | } | |
0fdd1e2c DG |
4280 | |
4281 | /* Set global SHM for ust */ | |
4282 | if (strlen(wait_shm_path) == 0) { | |
4283 | snprintf(wait_shm_path, PATH_MAX, | |
4284 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4285 | } | |
67e40797 DG |
4286 | |
4287 | /* Setup kernel consumerd path */ | |
4288 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4289 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4290 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4291 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4292 | |
4293 | DBG2("Kernel consumer err path: %s", | |
4294 | kconsumer_data.err_unix_sock_path); | |
4295 | DBG2("Kernel consumer cmd path: %s", | |
4296 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4297 | } else { |
b082db07 DG |
4298 | home_path = get_home_dir(); |
4299 | if (home_path == NULL) { | |
273ea72c DG |
4300 | /* TODO: Add --socket PATH option */ |
4301 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4302 | ret = -EPERM; |
4303 | goto error; | |
b082db07 DG |
4304 | } |
4305 | ||
67e40797 DG |
4306 | /* |
4307 | * Create rundir from home path. This will create something like | |
4308 | * $HOME/.lttng | |
4309 | */ | |
990570ed | 4310 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4311 | if (ret < 0) { |
4312 | ret = -ENOMEM; | |
4313 | goto error; | |
4314 | } | |
4315 | ||
4316 | ret = create_lttng_rundir(rundir); | |
4317 | if (ret < 0) { | |
4318 | goto error; | |
4319 | } | |
4320 | ||
fac6795d | 4321 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4322 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4323 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4324 | } |
4325 | ||
4326 | /* Set the cli tool unix socket path */ | |
4327 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4328 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4329 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4330 | } |
0fdd1e2c DG |
4331 | |
4332 | /* Set global SHM for ust */ | |
4333 | if (strlen(wait_shm_path) == 0) { | |
4334 | snprintf(wait_shm_path, PATH_MAX, | |
4335 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4336 | } | |
fac6795d DG |
4337 | } |
4338 | ||
847177cd DG |
4339 | DBG("Client socket path %s", client_unix_sock_path); |
4340 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4341 | DBG("LTTng run directory path: %s", rundir); |
4342 | ||
4343 | /* 32 bits consumerd path setup */ | |
4344 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4345 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4346 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4347 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4348 | |
4349 | DBG2("UST consumer 32 bits err path: %s", | |
4350 | ustconsumer32_data.err_unix_sock_path); | |
4351 | DBG2("UST consumer 32 bits cmd path: %s", | |
4352 | ustconsumer32_data.cmd_unix_sock_path); | |
4353 | ||
4354 | /* 64 bits consumerd path setup */ | |
4355 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4356 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4357 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4358 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4359 | |
4360 | DBG2("UST consumer 64 bits err path: %s", | |
4361 | ustconsumer64_data.err_unix_sock_path); | |
4362 | DBG2("UST consumer 64 bits cmd path: %s", | |
4363 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4364 | |
273ea72c | 4365 | /* |
7d8234d9 | 4366 | * See if daemon already exist. |
fac6795d | 4367 | */ |
7d8234d9 | 4368 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4369 | ERR("Already running daemon.\n"); |
273ea72c | 4370 | /* |
cf3af59e MD |
4371 | * We do not goto exit because we must not cleanup() |
4372 | * because a daemon is already running. | |
ab118b20 | 4373 | */ |
cf3af59e | 4374 | goto error; |
a88df331 DG |
4375 | } |
4376 | ||
54d01ffb | 4377 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4378 | |
4379 | /* | |
4380 | * These actions must be executed as root. We do that *after* setting up | |
4381 | * the sockets path because we MUST make the check for another daemon using | |
4382 | * those paths *before* trying to set the kernel consumer sockets and init | |
4383 | * kernel tracer. | |
4384 | */ | |
4385 | if (is_root) { | |
67e40797 | 4386 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4387 | if (ret < 0) { |
4388 | goto exit; | |
4389 | } | |
4390 | ||
a88df331 | 4391 | /* Setup kernel tracer */ |
4fba7219 DG |
4392 | if (!opt_no_kernel) { |
4393 | init_kernel_tracer(); | |
4394 | } | |
a88df331 DG |
4395 | |
4396 | /* Set ulimit for open files */ | |
4397 | set_ulimit(); | |
fac6795d DG |
4398 | } |
4399 | ||
67e40797 DG |
4400 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4401 | if (ret < 0) { | |
4402 | goto exit; | |
4403 | } | |
4404 | ||
4405 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4406 | if (ret < 0) { | |
4407 | goto exit; | |
4408 | } | |
4409 | ||
cf3af59e MD |
4410 | if ((ret = set_signal_handler()) < 0) { |
4411 | goto exit; | |
fac6795d DG |
4412 | } |
4413 | ||
d6f42150 | 4414 | /* Setup the needed unix socket */ |
cf3af59e MD |
4415 | if ((ret = init_daemon_socket()) < 0) { |
4416 | goto exit; | |
fac6795d DG |
4417 | } |
4418 | ||
4419 | /* Set credentials to socket */ | |
be040666 | 4420 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4421 | goto exit; |
fac6795d DG |
4422 | } |
4423 | ||
5b8719f5 DG |
4424 | /* Get parent pid if -S, --sig-parent is specified. */ |
4425 | if (opt_sig_parent) { | |
4426 | ppid = getppid(); | |
4427 | } | |
4428 | ||
7a485870 | 4429 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4430 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4431 | goto exit; | |
7a485870 DG |
4432 | } |
4433 | ||
099e26bd DG |
4434 | /* Setup the thread apps communication pipe. */ |
4435 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4436 | goto exit; | |
4437 | } | |
4438 | ||
4439 | /* Init UST command queue. */ | |
4440 | cds_wfq_init(&ust_cmd_queue.queue); | |
4441 | ||
f6a9efaa DG |
4442 | /* Init UST app hash table */ |
4443 | ust_app_ht_alloc(); | |
4444 | ||
273ea72c | 4445 | /* |
54d01ffb DG |
4446 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4447 | * statically declared in session.c | |
273ea72c | 4448 | */ |
54d01ffb | 4449 | session_list_ptr = session_get_list(); |
b5541356 | 4450 | |
5eb91c98 DG |
4451 | /* Set up max poll set size */ |
4452 | lttng_poll_set_max_size(); | |
4453 | ||
cf3af59e | 4454 | /* Create thread to manage the client socket */ |
099e26bd DG |
4455 | ret = pthread_create(&client_thread, NULL, |
4456 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4457 | if (ret != 0) { |
099e26bd | 4458 | perror("pthread_create clients"); |
cf3af59e MD |
4459 | goto exit_client; |
4460 | } | |
fac6795d | 4461 | |
099e26bd DG |
4462 | /* Create thread to dispatch registration */ |
4463 | ret = pthread_create(&dispatch_thread, NULL, | |
4464 | thread_dispatch_ust_registration, (void *) NULL); | |
4465 | if (ret != 0) { | |
4466 | perror("pthread_create dispatch"); | |
4467 | goto exit_dispatch; | |
4468 | } | |
4469 | ||
4470 | /* Create thread to manage application registration. */ | |
4471 | ret = pthread_create(®_apps_thread, NULL, | |
4472 | thread_registration_apps, (void *) NULL); | |
4473 | if (ret != 0) { | |
4474 | perror("pthread_create registration"); | |
4475 | goto exit_reg_apps; | |
4476 | } | |
4477 | ||
cf3af59e | 4478 | /* Create thread to manage application socket */ |
54d01ffb DG |
4479 | ret = pthread_create(&apps_thread, NULL, |
4480 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4481 | if (ret != 0) { |
099e26bd | 4482 | perror("pthread_create apps"); |
cf3af59e MD |
4483 | goto exit_apps; |
4484 | } | |
fac6795d | 4485 | |
cf3af59e | 4486 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4487 | ret = pthread_create(&kernel_thread, NULL, |
4488 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4489 | if (ret != 0) { |
099e26bd | 4490 | perror("pthread_create kernel"); |
cf3af59e MD |
4491 | goto exit_kernel; |
4492 | } | |
7a485870 | 4493 | |
cf3af59e MD |
4494 | ret = pthread_join(kernel_thread, &status); |
4495 | if (ret != 0) { | |
4496 | perror("pthread_join"); | |
4497 | goto error; /* join error, exit without cleanup */ | |
fac6795d DG |
4498 | } |
4499 | ||
cf3af59e MD |
4500 | exit_kernel: |
4501 | ret = pthread_join(apps_thread, &status); | |
4502 | if (ret != 0) { | |
4503 | perror("pthread_join"); | |
4504 | goto error; /* join error, exit without cleanup */ | |
4505 | } | |
fac6795d | 4506 | |
cf3af59e | 4507 | exit_apps: |
099e26bd DG |
4508 | ret = pthread_join(reg_apps_thread, &status); |
4509 | if (ret != 0) { | |
4510 | perror("pthread_join"); | |
4511 | goto error; /* join error, exit without cleanup */ | |
4512 | } | |
4513 | ||
4514 | exit_reg_apps: | |
4515 | ret = pthread_join(dispatch_thread, &status); | |
4516 | if (ret != 0) { | |
4517 | perror("pthread_join"); | |
4518 | goto error; /* join error, exit without cleanup */ | |
4519 | } | |
4520 | ||
4521 | exit_dispatch: | |
cf3af59e MD |
4522 | ret = pthread_join(client_thread, &status); |
4523 | if (ret != 0) { | |
4524 | perror("pthread_join"); | |
4525 | goto error; /* join error, exit without cleanup */ | |
4526 | } | |
4527 | ||
3bd1e081 | 4528 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4529 | if (ret != 0) { |
3bd1e081 | 4530 | perror("join_consumer"); |
cf3af59e MD |
4531 | goto error; /* join error, exit without cleanup */ |
4532 | } | |
a88df331 | 4533 | |
cf3af59e | 4534 | exit_client: |
a88df331 | 4535 | exit: |
cf3af59e MD |
4536 | /* |
4537 | * cleanup() is called when no other thread is running. | |
4538 | */ | |
f6a9efaa | 4539 | rcu_thread_online(); |
cf3af59e | 4540 | cleanup(); |
f6a9efaa DG |
4541 | rcu_thread_offline(); |
4542 | rcu_unregister_thread(); | |
67e40797 | 4543 | if (!ret) { |
cf3af59e | 4544 | exit(EXIT_SUCCESS); |
67e40797 | 4545 | } |
cf3af59e | 4546 | error: |
5e16da05 | 4547 | exit(EXIT_FAILURE); |
fac6795d | 4548 | } |