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 | |
ca4537d3 | 20 | #include <fcntl.h> |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
24 | #include <pthread.h> | |
8c0faa1d | 25 | #include <semaphore.h> |
fac6795d DG |
26 | #include <signal.h> |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
0fdd1e2c | 30 | #include <sys/mman.h> |
b73401da | 31 | #include <sys/mount.h> |
1e307fab | 32 | #include <sys/resource.h> |
fac6795d DG |
33 | #include <sys/socket.h> |
34 | #include <sys/stat.h> | |
35 | #include <sys/types.h> | |
0fdd1e2c DG |
36 | #include <sys/wait.h> |
37 | #include <urcu/futex.h> | |
fac6795d | 38 | #include <unistd.h> |
3bd1e081 | 39 | #include <config.h> |
fac6795d | 40 | |
990570ed | 41 | #include <common/common.h> |
0ba98ebc | 42 | #include <common/compat/poll.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 | { | |
ca4537d3 | 298 | int ret; |
273ea72c | 299 | |
ca4537d3 | 300 | ret = pipe2(thread_quit_pipe, O_CLOEXEC); |
273ea72c | 301 | if (ret < 0) { |
ca4537d3 | 302 | perror("thread quit pipe"); |
273ea72c DG |
303 | goto error; |
304 | } | |
305 | ||
306 | error: | |
307 | return ret; | |
308 | } | |
309 | ||
fac6795d | 310 | /* |
d063d709 DG |
311 | * Complete teardown of a kernel session. This free all data structure related |
312 | * to a kernel session and update counter. | |
fac6795d | 313 | */ |
1d4b027a | 314 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 315 | { |
8f7a84dd | 316 | if (!session->kernel_session) { |
99bab54f | 317 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 318 | return; |
8f7a84dd DG |
319 | } |
320 | ||
84ea9c99 | 321 | DBG("Tearing down kernel session"); |
d9800920 | 322 | |
84ea9c99 MD |
323 | /* |
324 | * If a custom kernel consumer was registered, close the socket before | |
325 | * tearing down the complete kernel session structure | |
326 | */ | |
327 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
328 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); | |
fac6795d | 329 | } |
84ea9c99 MD |
330 | |
331 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
332 | } |
333 | ||
f6a9efaa DG |
334 | /* |
335 | * Complete teardown of all UST sessions. This will free everything on his path | |
336 | * and destroy the core essence of all ust sessions :) | |
337 | */ | |
338 | static void teardown_ust_session(struct ltt_session *session) | |
339 | { | |
84cd17c6 MD |
340 | int ret; |
341 | ||
8f7a84dd | 342 | if (!session->ust_session) { |
99bab54f | 343 | DBG3("No UST session when tearing down session"); |
f470a390 | 344 | return; |
8f7a84dd DG |
345 | } |
346 | ||
84ea9c99 | 347 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 348 | |
84cd17c6 MD |
349 | ret = ust_app_destroy_trace_all(session->ust_session); |
350 | if (ret) { | |
351 | ERR("Error in ust_app_destroy_trace_all"); | |
352 | } | |
8f7a84dd | 353 | |
f6a9efaa DG |
354 | trace_ust_destroy_session(session->ust_session); |
355 | } | |
356 | ||
099e26bd DG |
357 | /* |
358 | * Stop all threads by closing the thread quit pipe. | |
359 | */ | |
cf3af59e MD |
360 | static void stop_threads(void) |
361 | { | |
5eb91c98 DG |
362 | int ret; |
363 | ||
cf3af59e MD |
364 | /* Stopping all threads */ |
365 | DBG("Terminating all threads"); | |
54d01ffb | 366 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
367 | if (ret < 0) { |
368 | ERR("write error on thread quit pipe"); | |
369 | } | |
370 | ||
099e26bd DG |
371 | /* Dispatch thread */ |
372 | dispatch_thread_exit = 1; | |
373 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
374 | } |
375 | ||
fac6795d | 376 | /* |
d063d709 | 377 | * Cleanup the daemon |
fac6795d | 378 | */ |
cf3af59e | 379 | static void cleanup(void) |
fac6795d | 380 | { |
1d4b027a DG |
381 | int ret; |
382 | char *cmd; | |
af9737e9 | 383 | struct ltt_session *sess, *stmp; |
fac6795d | 384 | |
1d4b027a | 385 | DBG("Cleaning up"); |
e07ae692 | 386 | |
67e40797 DG |
387 | DBG("Removing %s directory", rundir); |
388 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
389 | if (ret < 0) { | |
390 | ERR("asprintf failed. Something is really wrong!"); | |
391 | } | |
5461b305 | 392 | |
67e40797 DG |
393 | /* Remove lttng run directory */ |
394 | ret = system(cmd); | |
395 | if (ret < 0) { | |
396 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 397 | } |
67e40797 | 398 | free(cmd); |
5461b305 | 399 | |
99bab54f | 400 | DBG("Cleaning up all sessions"); |
fac6795d | 401 | |
b5541356 | 402 | /* Destroy session list mutex */ |
273ea72c DG |
403 | if (session_list_ptr != NULL) { |
404 | pthread_mutex_destroy(&session_list_ptr->lock); | |
405 | ||
406 | /* Cleanup ALL session */ | |
54d01ffb DG |
407 | cds_list_for_each_entry_safe(sess, stmp, |
408 | &session_list_ptr->head, list) { | |
273ea72c | 409 | teardown_kernel_session(sess); |
f6a9efaa DG |
410 | teardown_ust_session(sess); |
411 | free(sess); | |
273ea72c DG |
412 | } |
413 | } | |
414 | ||
099e26bd | 415 | DBG("Closing all UST sockets"); |
56fff090 | 416 | ust_app_clean_list(); |
099e26bd | 417 | |
3bd1e081 | 418 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 419 | |
4fba7219 DG |
420 | if (is_root && !opt_no_kernel) { |
421 | DBG2("Closing kernel fd"); | |
422 | close(kernel_tracer_fd); | |
2f50c8a3 | 423 | DBG("Unloading kernel modules"); |
096102bd | 424 | modprobe_remove_lttng_all(); |
2f50c8a3 | 425 | } |
5eb91c98 DG |
426 | |
427 | close(thread_quit_pipe[0]); | |
428 | close(thread_quit_pipe[1]); | |
421cb601 DG |
429 | |
430 | /* <fun> */ | |
f56a39af | 431 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
432 | "Matthew, BEET driven development works!%c[%dm", |
433 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
434 | /* </fun> */ | |
fac6795d DG |
435 | } |
436 | ||
e065084a | 437 | /* |
d063d709 | 438 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 439 | * |
d063d709 | 440 | * Return lttcomm error code. |
e065084a DG |
441 | */ |
442 | static int send_unix_sock(int sock, void *buf, size_t len) | |
443 | { | |
444 | /* Check valid length */ | |
445 | if (len <= 0) { | |
446 | return -1; | |
447 | } | |
448 | ||
449 | return lttcomm_send_unix_sock(sock, buf, len); | |
450 | } | |
451 | ||
5461b305 | 452 | /* |
d063d709 | 453 | * Free memory of a command context structure. |
5461b305 | 454 | */ |
a2fb29a5 | 455 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 456 | { |
a2fb29a5 DG |
457 | DBG("Clean command context structure"); |
458 | if (*cmd_ctx) { | |
459 | if ((*cmd_ctx)->llm) { | |
460 | free((*cmd_ctx)->llm); | |
5461b305 | 461 | } |
a2fb29a5 DG |
462 | if ((*cmd_ctx)->lsm) { |
463 | free((*cmd_ctx)->lsm); | |
5461b305 | 464 | } |
a2fb29a5 DG |
465 | free(*cmd_ctx); |
466 | *cmd_ctx = NULL; | |
5461b305 DG |
467 | } |
468 | } | |
469 | ||
f3ed775e | 470 | /* |
d063d709 | 471 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 472 | */ |
2bdd86d4 | 473 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
474 | int sock, struct ltt_kernel_channel *channel, |
475 | uid_t uid, gid_t gid) | |
f3ed775e DG |
476 | { |
477 | int ret; | |
f3ed775e | 478 | struct ltt_kernel_stream *stream; |
3bd1e081 | 479 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 480 | |
3bd1e081 | 481 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 482 | channel->channel->name); |
f3ed775e | 483 | |
3bd1e081 MD |
484 | /* Send channel */ |
485 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
486 | lkm.u.channel.channel_key = channel->fd; | |
487 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
488 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 489 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 490 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 491 | if (ret < 0) { |
3bd1e081 | 492 | perror("send consumer channel"); |
f3ed775e DG |
493 | goto error; |
494 | } | |
495 | ||
3bd1e081 | 496 | /* Send streams */ |
7a485870 | 497 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
498 | if (!stream->fd) { |
499 | continue; | |
500 | } | |
501 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
502 | lkm.u.stream.channel_key = channel->fd; | |
503 | lkm.u.stream.stream_key = stream->fd; | |
504 | lkm.u.stream.state = stream->state; | |
505 | lkm.u.stream.output = channel->channel->attr.output; | |
506 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
507 | lkm.u.stream.uid = uid; |
508 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
509 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
510 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
511 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
512 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
513 | if (ret < 0) { | |
514 | perror("send consumer stream"); | |
515 | goto error; | |
516 | } | |
517 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
518 | if (ret < 0) { | |
519 | perror("send consumer stream ancillary data"); | |
520 | goto error; | |
f3ed775e DG |
521 | } |
522 | } | |
523 | ||
3bd1e081 | 524 | DBG("consumer channel streams sent"); |
f3ed775e DG |
525 | |
526 | return 0; | |
527 | ||
528 | error: | |
529 | return ret; | |
530 | } | |
531 | ||
532 | /* | |
d063d709 | 533 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 534 | */ |
2bdd86d4 | 535 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 536 | struct ltt_kernel_session *session) |
f3ed775e DG |
537 | { |
538 | int ret; | |
539 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
540 | struct lttcomm_consumer_msg lkm; |
541 | int sock = session->consumer_fd; | |
7a485870 DG |
542 | |
543 | DBG("Sending metadata stream fd"); | |
544 | ||
2bdd86d4 | 545 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 546 | if (session->consumer_fd == 0) { |
3bd1e081 | 547 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
548 | } |
549 | ||
7a485870 | 550 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
551 | /* Send metadata channel fd */ |
552 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
553 | lkm.u.channel.channel_key = session->metadata->fd; | |
554 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
555 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
556 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
557 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
558 | if (ret < 0) { | |
559 | perror("send consumer channel"); | |
560 | goto error; | |
561 | } | |
562 | ||
563 | /* Send metadata stream fd */ | |
564 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
565 | lkm.u.stream.channel_key = session->metadata->fd; | |
566 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
567 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
568 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
569 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
570 | lkm.u.stream.uid = session->uid; |
571 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
572 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
573 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
574 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
575 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
576 | if (ret < 0) { | |
577 | perror("send consumer stream"); | |
578 | goto error; | |
579 | } | |
580 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 581 | if (ret < 0) { |
3bd1e081 | 582 | perror("send consumer stream"); |
7a485870 DG |
583 | goto error; |
584 | } | |
585 | } | |
f3ed775e | 586 | |
f3ed775e | 587 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
588 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
589 | session->uid, session->gid); | |
2bdd86d4 MD |
590 | if (ret < 0) { |
591 | goto error; | |
592 | } | |
593 | } | |
594 | ||
595 | DBG("consumer fds (metadata and channel streams) sent"); | |
596 | ||
597 | return 0; | |
598 | ||
599 | error: | |
600 | return ret; | |
601 | } | |
602 | ||
fac6795d | 603 | /* |
0fdd1e2c | 604 | * Notify UST applications using the shm mmap futex. |
fac6795d | 605 | */ |
0fdd1e2c | 606 | static int notify_ust_apps(int active) |
fac6795d | 607 | { |
0fdd1e2c | 608 | char *wait_shm_mmap; |
fac6795d | 609 | |
0fdd1e2c | 610 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 611 | |
0fdd1e2c DG |
612 | /* See shm.c for this call implying mmap, shm and futex calls */ |
613 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
614 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
615 | goto error; |
616 | } | |
617 | ||
0fdd1e2c DG |
618 | /* Wake waiting process */ |
619 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
620 | ||
621 | /* Apps notified successfully */ | |
622 | return 0; | |
fac6795d DG |
623 | |
624 | error: | |
0fdd1e2c | 625 | return -1; |
fac6795d DG |
626 | } |
627 | ||
e065084a | 628 | /* |
d063d709 DG |
629 | * Setup the outgoing data buffer for the response (llm) by allocating the |
630 | * right amount of memory and copying the original information from the lsm | |
631 | * structure. | |
ca95a216 | 632 | * |
d063d709 | 633 | * Return total size of the buffer pointed by buf. |
ca95a216 | 634 | */ |
5461b305 | 635 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 636 | { |
f3ed775e | 637 | int ret, buf_size; |
ca95a216 | 638 | |
f3ed775e | 639 | buf_size = size; |
5461b305 | 640 | |
ba7f0ae5 | 641 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 642 | if (cmd_ctx->llm == NULL) { |
ba7f0ae5 | 643 | perror("zmalloc"); |
5461b305 | 644 | ret = -ENOMEM; |
ca95a216 DG |
645 | goto error; |
646 | } | |
647 | ||
5461b305 DG |
648 | /* Copy common data */ |
649 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 650 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 651 | |
5461b305 DG |
652 | cmd_ctx->llm->data_size = size; |
653 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
654 | ||
ca95a216 DG |
655 | return buf_size; |
656 | ||
657 | error: | |
658 | return ret; | |
659 | } | |
660 | ||
7a485870 | 661 | /* |
5eb91c98 | 662 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 663 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 664 | */ |
5eb91c98 | 665 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 666 | { |
5eb91c98 | 667 | int ret; |
7a485870 DG |
668 | struct ltt_session *session; |
669 | struct ltt_kernel_channel *channel; | |
670 | ||
5eb91c98 | 671 | DBG("Updating kernel poll set"); |
7a485870 | 672 | |
54d01ffb | 673 | session_lock_list(); |
b5541356 | 674 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 675 | session_lock(session); |
7a485870 | 676 | if (session->kernel_session == NULL) { |
54d01ffb | 677 | session_unlock(session); |
7a485870 DG |
678 | continue; |
679 | } | |
7a485870 | 680 | |
54d01ffb DG |
681 | cds_list_for_each_entry(channel, |
682 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
683 | /* Add channel fd to the kernel poll set */ |
684 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
685 | if (ret < 0) { | |
54d01ffb | 686 | session_unlock(session); |
5eb91c98 DG |
687 | goto error; |
688 | } | |
689 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 690 | } |
54d01ffb | 691 | session_unlock(session); |
7a485870 | 692 | } |
54d01ffb | 693 | session_unlock_list(); |
7a485870 | 694 | |
5eb91c98 | 695 | return 0; |
7a485870 DG |
696 | |
697 | error: | |
54d01ffb | 698 | session_unlock_list(); |
7a485870 DG |
699 | return -1; |
700 | } | |
701 | ||
702 | /* | |
54d01ffb | 703 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 704 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 705 | * |
d063d709 | 706 | * Useful for CPU hotplug feature. |
7a485870 | 707 | */ |
2bdd86d4 | 708 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
709 | { |
710 | int ret = 0; | |
711 | struct ltt_session *session; | |
712 | struct ltt_kernel_channel *channel; | |
713 | ||
714 | DBG("Updating kernel streams for channel fd %d", fd); | |
715 | ||
54d01ffb | 716 | session_lock_list(); |
b5541356 | 717 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 718 | session_lock(session); |
7a485870 | 719 | if (session->kernel_session == NULL) { |
54d01ffb | 720 | session_unlock(session); |
7a485870 DG |
721 | continue; |
722 | } | |
d9800920 DG |
723 | |
724 | /* This is not suppose to be 0 but this is an extra security check */ | |
725 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 726 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
727 | } |
728 | ||
5eb91c98 DG |
729 | cds_list_for_each_entry(channel, |
730 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
731 | if (channel->fd == fd) { |
732 | DBG("Channel found, updating kernel streams"); | |
733 | ret = kernel_open_channel_stream(channel); | |
734 | if (ret < 0) { | |
b3c750d2 | 735 | goto error; |
7a485870 | 736 | } |
d9800920 | 737 | |
7a485870 | 738 | /* |
5eb91c98 DG |
739 | * Have we already sent fds to the consumer? If yes, it means |
740 | * that tracing is started so it is safe to send our updated | |
741 | * stream fds. | |
7a485870 | 742 | */ |
3bd1e081 | 743 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 744 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
745 | session->kernel_session->consumer_fd, channel, |
746 | session->uid, session->gid); | |
7a485870 | 747 | if (ret < 0) { |
b3c750d2 | 748 | goto error; |
7a485870 DG |
749 | } |
750 | } | |
b3c750d2 | 751 | goto error; |
7a485870 DG |
752 | } |
753 | } | |
54d01ffb | 754 | session_unlock(session); |
7a485870 | 755 | } |
54d01ffb | 756 | session_unlock_list(); |
b3c750d2 | 757 | return ret; |
7a485870 | 758 | |
b3c750d2 | 759 | error: |
54d01ffb DG |
760 | session_unlock(session); |
761 | session_unlock_list(); | |
7a485870 DG |
762 | return ret; |
763 | } | |
764 | ||
487cf67c DG |
765 | /* |
766 | * For each tracing session, update newly registered apps. | |
767 | */ | |
768 | static void update_ust_app(int app_sock) | |
769 | { | |
770 | struct ltt_session *sess, *stmp; | |
771 | ||
4ee14516 DG |
772 | session_lock_list(); |
773 | ||
487cf67c DG |
774 | /* For all tracing session(s) */ |
775 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 776 | session_lock(sess); |
421cb601 DG |
777 | if (sess->ust_session) { |
778 | ust_app_global_update(sess->ust_session, app_sock); | |
779 | } | |
4ee14516 | 780 | session_unlock(sess); |
487cf67c | 781 | } |
4ee14516 DG |
782 | |
783 | session_unlock_list(); | |
487cf67c DG |
784 | } |
785 | ||
7a485870 | 786 | /* |
d063d709 | 787 | * This thread manage event coming from the kernel. |
7a485870 | 788 | * |
d063d709 DG |
789 | * Features supported in this thread: |
790 | * -) CPU Hotplug | |
7a485870 DG |
791 | */ |
792 | static void *thread_manage_kernel(void *data) | |
793 | { | |
5eb91c98 DG |
794 | int ret, i, pollfd, update_poll_flag = 1; |
795 | uint32_t revents, nb_fd; | |
7a485870 | 796 | char tmp; |
5eb91c98 | 797 | struct lttng_poll_event events; |
7a485870 DG |
798 | |
799 | DBG("Thread manage kernel started"); | |
800 | ||
5eb91c98 DG |
801 | ret = create_thread_poll_set(&events, 2); |
802 | if (ret < 0) { | |
803 | goto error; | |
804 | } | |
805 | ||
806 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
807 | if (ret < 0) { | |
808 | goto error; | |
809 | } | |
810 | ||
7a485870 DG |
811 | while (1) { |
812 | if (update_poll_flag == 1) { | |
5f822d0a DG |
813 | /* |
814 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
815 | * quit pipe and the kernel pipe. | |
816 | */ | |
817 | events.nb_fd = 2; | |
818 | ||
5eb91c98 DG |
819 | ret = update_kernel_poll(&events); |
820 | if (ret < 0) { | |
7a485870 DG |
821 | goto error; |
822 | } | |
823 | update_poll_flag = 0; | |
824 | } | |
825 | ||
5eb91c98 DG |
826 | nb_fd = LTTNG_POLL_GETNB(&events); |
827 | ||
828 | DBG("Thread kernel polling on %d fds", nb_fd); | |
829 | ||
830 | /* Zeroed the poll events */ | |
831 | lttng_poll_reset(&events); | |
7a485870 DG |
832 | |
833 | /* Poll infinite value of time */ | |
a8b0b341 | 834 | restart: |
5eb91c98 | 835 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 836 | if (ret < 0) { |
a8b0b341 MD |
837 | /* |
838 | * Restart interrupted system call. | |
839 | */ | |
840 | if (errno == EINTR) { | |
841 | goto restart; | |
842 | } | |
7a485870 DG |
843 | goto error; |
844 | } else if (ret == 0) { | |
845 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
846 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
847 | "This should not have happened! Continuing..."); | |
7a485870 DG |
848 | continue; |
849 | } | |
850 | ||
5eb91c98 DG |
851 | for (i = 0; i < nb_fd; i++) { |
852 | /* Fetch once the poll data */ | |
853 | revents = LTTNG_POLL_GETEV(&events, i); | |
854 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 855 | |
5eb91c98 DG |
856 | /* Thread quit pipe has been closed. Killing thread. */ |
857 | ret = check_thread_quit_pipe(pollfd, revents); | |
858 | if (ret) { | |
859 | goto error; | |
860 | } | |
7a485870 | 861 | |
5eb91c98 DG |
862 | /* Check for data on kernel pipe */ |
863 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
864 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
865 | update_poll_flag = 1; | |
866 | continue; | |
867 | } else { | |
868 | /* | |
869 | * New CPU detected by the kernel. Adding kernel stream to | |
870 | * kernel session and updating the kernel consumer | |
871 | */ | |
872 | if (revents & LPOLLIN) { | |
2bdd86d4 | 873 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
874 | if (ret < 0) { |
875 | continue; | |
876 | } | |
877 | break; | |
878 | /* | |
879 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
880 | * and unregister kernel stream at this point. | |
881 | */ | |
7a485870 | 882 | } |
7a485870 DG |
883 | } |
884 | } | |
885 | } | |
886 | ||
887 | error: | |
888 | DBG("Kernel thread dying"); | |
273ea72c DG |
889 | close(kernel_poll_pipe[0]); |
890 | close(kernel_poll_pipe[1]); | |
5eb91c98 DG |
891 | |
892 | lttng_poll_clean(&events); | |
893 | ||
7a485870 DG |
894 | return NULL; |
895 | } | |
896 | ||
1d4b027a | 897 | /* |
3bd1e081 | 898 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 899 | */ |
3bd1e081 | 900 | static void *thread_manage_consumer(void *data) |
1d4b027a | 901 | { |
5eb91c98 DG |
902 | int sock = 0, i, ret, pollfd; |
903 | uint32_t revents, nb_fd; | |
1d4b027a | 904 | enum lttcomm_return_code code; |
5eb91c98 | 905 | struct lttng_poll_event events; |
3bd1e081 | 906 | struct consumer_data *consumer_data = data; |
1d4b027a | 907 | |
3bd1e081 | 908 | DBG("[thread] Manage consumer started"); |
1d4b027a | 909 | |
3bd1e081 | 910 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
911 | if (ret < 0) { |
912 | goto error; | |
913 | } | |
914 | ||
5eb91c98 DG |
915 | /* |
916 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
917 | * Nothing more will be added to this poll set. | |
918 | */ | |
919 | ret = create_thread_poll_set(&events, 2); | |
920 | if (ret < 0) { | |
921 | goto error; | |
922 | } | |
273ea72c | 923 | |
3bd1e081 | 924 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
925 | if (ret < 0) { |
926 | goto error; | |
927 | } | |
928 | ||
929 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
930 | |
931 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 932 | restart: |
5eb91c98 | 933 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 934 | if (ret < 0) { |
a8b0b341 MD |
935 | /* |
936 | * Restart interrupted system call. | |
937 | */ | |
938 | if (errno == EINTR) { | |
939 | goto restart; | |
940 | } | |
273ea72c DG |
941 | goto error; |
942 | } | |
943 | ||
5eb91c98 DG |
944 | for (i = 0; i < nb_fd; i++) { |
945 | /* Fetch once the poll data */ | |
946 | revents = LTTNG_POLL_GETEV(&events, i); | |
947 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
948 | ||
949 | /* Thread quit pipe has been closed. Killing thread. */ | |
950 | ret = check_thread_quit_pipe(pollfd, revents); | |
951 | if (ret) { | |
952 | goto error; | |
953 | } | |
954 | ||
955 | /* Event on the registration socket */ | |
3bd1e081 | 956 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 957 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 958 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
959 | goto error; |
960 | } | |
961 | } | |
273ea72c DG |
962 | } |
963 | ||
3bd1e081 | 964 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
965 | if (sock < 0) { |
966 | goto error; | |
967 | } | |
968 | ||
3bd1e081 | 969 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 970 | |
712ea556 | 971 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
972 | ret = lttcomm_recv_unix_sock(sock, &code, |
973 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
974 | if (ret <= 0) { |
975 | goto error; | |
976 | } | |
977 | ||
3bd1e081 MD |
978 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
979 | consumer_data->cmd_sock = | |
980 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
981 | if (consumer_data->cmd_sock < 0) { | |
982 | sem_post(&consumer_data->sem); | |
48842b30 | 983 | PERROR("consumer connect"); |
1d4b027a DG |
984 | goto error; |
985 | } | |
986 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
987 | sem_post(&consumer_data->sem); |
988 | DBG("consumer command socket ready"); | |
1d4b027a | 989 | } else { |
3bd1e081 | 990 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
991 | lttcomm_get_readable_code(-code)); |
992 | goto error; | |
993 | } | |
994 | ||
54d01ffb | 995 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 996 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 997 | if (ret < 0) { |
72079cae DG |
998 | goto error; |
999 | } | |
1000 | ||
5eb91c98 DG |
1001 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1002 | if (ret < 0) { | |
72079cae | 1003 | goto error; |
5eb91c98 DG |
1004 | } |
1005 | ||
1006 | /* Update number of fd */ | |
1007 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1008 | ||
1009 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 1010 | restart_poll: |
5eb91c98 DG |
1011 | ret = lttng_poll_wait(&events, -1); |
1012 | if (ret < 0) { | |
a8b0b341 MD |
1013 | /* |
1014 | * Restart interrupted system call. | |
1015 | */ | |
1016 | if (errno == EINTR) { | |
1017 | goto restart_poll; | |
1018 | } | |
72079cae DG |
1019 | goto error; |
1020 | } | |
1021 | ||
5eb91c98 DG |
1022 | for (i = 0; i < nb_fd; i++) { |
1023 | /* Fetch once the poll data */ | |
1024 | revents = LTTNG_POLL_GETEV(&events, i); | |
1025 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1026 | ||
1027 | /* Thread quit pipe has been closed. Killing thread. */ | |
1028 | ret = check_thread_quit_pipe(pollfd, revents); | |
1029 | if (ret) { | |
1030 | goto error; | |
1031 | } | |
1032 | ||
1033 | /* Event on the kconsumerd socket */ | |
1034 | if (pollfd == sock) { | |
1035 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1036 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1037 | goto error; |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | ||
712ea556 | 1042 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1043 | ret = lttcomm_recv_unix_sock(sock, &code, |
1044 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1045 | if (ret <= 0) { |
3bd1e081 | 1046 | ERR("consumer closed the command socket"); |
712ea556 | 1047 | goto error; |
6f61d021 | 1048 | } |
1d4b027a | 1049 | |
3bd1e081 | 1050 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1051 | |
1d4b027a | 1052 | error: |
3bd1e081 MD |
1053 | DBG("consumer thread dying"); |
1054 | close(consumer_data->err_sock); | |
1055 | close(consumer_data->cmd_sock); | |
5eb91c98 | 1056 | close(sock); |
273ea72c | 1057 | |
3bd1e081 MD |
1058 | unlink(consumer_data->err_unix_sock_path); |
1059 | unlink(consumer_data->cmd_unix_sock_path); | |
1060 | consumer_data->pid = 0; | |
1d4b027a | 1061 | |
5eb91c98 | 1062 | lttng_poll_clean(&events); |
0177d773 | 1063 | |
5eb91c98 | 1064 | return NULL; |
099e26bd DG |
1065 | } |
1066 | ||
099e26bd DG |
1067 | /* |
1068 | * This thread manage application communication. | |
1d4b027a DG |
1069 | */ |
1070 | static void *thread_manage_apps(void *data) | |
099e26bd | 1071 | { |
5eb91c98 DG |
1072 | int i, ret, pollfd; |
1073 | uint32_t revents, nb_fd; | |
099e26bd | 1074 | struct ust_command ust_cmd; |
5eb91c98 | 1075 | struct lttng_poll_event events; |
099e26bd DG |
1076 | |
1077 | DBG("[thread] Manage application started"); | |
1078 | ||
f6a9efaa DG |
1079 | rcu_register_thread(); |
1080 | rcu_thread_online(); | |
1081 | ||
5eb91c98 DG |
1082 | ret = create_thread_poll_set(&events, 2); |
1083 | if (ret < 0) { | |
1084 | goto error; | |
1085 | } | |
099e26bd | 1086 | |
5eb91c98 DG |
1087 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1088 | if (ret < 0) { | |
1089 | goto error; | |
1090 | } | |
099e26bd | 1091 | |
5eb91c98 DG |
1092 | while (1) { |
1093 | /* Zeroed the events structure */ | |
1094 | lttng_poll_reset(&events); | |
0177d773 | 1095 | |
5eb91c98 | 1096 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1097 | |
1098 | DBG("Apps thread polling on %d fds", nb_fd); | |
1099 | ||
1100 | /* Inifinite blocking call, waiting for transmission */ | |
a8b0b341 | 1101 | restart: |
5eb91c98 | 1102 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1103 | if (ret < 0) { |
a8b0b341 MD |
1104 | /* |
1105 | * Restart interrupted system call. | |
1106 | */ | |
1107 | if (errno == EINTR) { | |
1108 | goto restart; | |
1109 | } | |
099e26bd DG |
1110 | goto error; |
1111 | } | |
1112 | ||
5eb91c98 DG |
1113 | for (i = 0; i < nb_fd; i++) { |
1114 | /* Fetch once the poll data */ | |
1115 | revents = LTTNG_POLL_GETEV(&events, i); | |
1116 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1117 | ||
1118 | /* Thread quit pipe has been closed. Killing thread. */ | |
1119 | ret = check_thread_quit_pipe(pollfd, revents); | |
1120 | if (ret) { | |
099e26bd | 1121 | goto error; |
5eb91c98 | 1122 | } |
099e26bd | 1123 | |
5eb91c98 DG |
1124 | /* Inspect the apps cmd pipe */ |
1125 | if (pollfd == apps_cmd_pipe[0]) { | |
1126 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1127 | ERR("Apps command pipe error"); | |
0177d773 | 1128 | goto error; |
5eb91c98 DG |
1129 | } else if (revents & LPOLLIN) { |
1130 | /* Empty pipe */ | |
1131 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1132 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
1133 | perror("read apps cmd pipe"); | |
1134 | goto error; | |
1135 | } | |
099e26bd | 1136 | |
5eb91c98 | 1137 | /* Register applicaton to the session daemon */ |
56fff090 | 1138 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1139 | ust_cmd.sock); |
88ff5b7f | 1140 | if (ret == -ENOMEM) { |
5eb91c98 | 1141 | goto error; |
88ff5b7f MD |
1142 | } else if (ret < 0) { |
1143 | break; | |
5eb91c98 DG |
1144 | } |
1145 | ||
acc7b41b | 1146 | /* |
e0c7ec2b | 1147 | * Validate UST version compatibility. |
acc7b41b | 1148 | */ |
e0c7ec2b DG |
1149 | ret = ust_app_validate_version(ust_cmd.sock); |
1150 | if (ret >= 0) { | |
1151 | /* | |
1152 | * Add channel(s) and event(s) to newly registered apps | |
1153 | * from lttng global UST domain. | |
1154 | */ | |
1155 | update_ust_app(ust_cmd.sock); | |
1156 | } | |
acc7b41b | 1157 | |
f2ca2e25 | 1158 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1159 | if (ret < 0) { |
1160 | /* | |
1161 | * If the registration is not possible, we simply | |
1162 | * unregister the apps and continue | |
1163 | */ | |
56fff090 | 1164 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1165 | } else { |
1166 | /* | |
1167 | * We just need here to monitor the close of the UST | |
1168 | * socket and poll set monitor those by default. | |
ab08a675 MD |
1169 | * Listen on POLLIN (even if we never expect any |
1170 | * data) to ensure that hangup wakes us. | |
5eb91c98 | 1171 | */ |
ab08a675 | 1172 | ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN); |
5eb91c98 DG |
1173 | if (ret < 0) { |
1174 | goto error; | |
1175 | } | |
1176 | ||
54d01ffb DG |
1177 | DBG("Apps with sock %d added to poll set", |
1178 | ust_cmd.sock); | |
5eb91c98 | 1179 | } |
487cf67c | 1180 | |
5eb91c98 | 1181 | break; |
0177d773 | 1182 | } |
5eb91c98 DG |
1183 | } else { |
1184 | /* | |
54d01ffb DG |
1185 | * At this point, we know that a registered application made |
1186 | * the event at poll_wait. | |
5eb91c98 DG |
1187 | */ |
1188 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1189 | /* Removing from the poll set */ | |
1190 | ret = lttng_poll_del(&events, pollfd); | |
1191 | if (ret < 0) { | |
1192 | goto error; | |
1193 | } | |
099e26bd | 1194 | |
b9d9b220 | 1195 | /* Socket closed on remote end. */ |
56fff090 | 1196 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1197 | break; |
1198 | } | |
099e26bd DG |
1199 | } |
1200 | } | |
099e26bd DG |
1201 | } |
1202 | ||
1203 | error: | |
1204 | DBG("Application communication apps dying"); | |
1205 | close(apps_cmd_pipe[0]); | |
1206 | close(apps_cmd_pipe[1]); | |
1207 | ||
5eb91c98 | 1208 | lttng_poll_clean(&events); |
099e26bd | 1209 | |
f6a9efaa DG |
1210 | rcu_thread_offline(); |
1211 | rcu_unregister_thread(); | |
099e26bd DG |
1212 | return NULL; |
1213 | } | |
1214 | ||
1215 | /* | |
1216 | * Dispatch request from the registration threads to the application | |
1217 | * communication thread. | |
1218 | */ | |
1219 | static void *thread_dispatch_ust_registration(void *data) | |
1220 | { | |
1221 | int ret; | |
1222 | struct cds_wfq_node *node; | |
1223 | struct ust_command *ust_cmd = NULL; | |
1224 | ||
1225 | DBG("[thread] Dispatch UST command started"); | |
1226 | ||
1227 | while (!dispatch_thread_exit) { | |
1228 | /* Atomically prepare the queue futex */ | |
1229 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1230 | ||
1231 | do { | |
1232 | /* Dequeue command for registration */ | |
1233 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1234 | if (node == NULL) { | |
00a17c97 | 1235 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1236 | /* Continue thread execution */ |
1237 | break; | |
1238 | } | |
1239 | ||
1240 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1241 | ||
2f50c8a3 DG |
1242 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1243 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1244 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1245 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1246 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1247 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1248 | /* |
1249 | * Inform apps thread of the new application registration. This | |
1250 | * call is blocking so we can be assured that the data will be read | |
1251 | * at some point in time or wait to the end of the world :) | |
1252 | */ | |
1253 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1254 | sizeof(struct ust_command)); | |
1255 | if (ret < 0) { | |
1256 | perror("write apps cmd pipe"); | |
1257 | if (errno == EBADF) { | |
1258 | /* | |
1259 | * We can't inform the application thread to process | |
1260 | * registration. We will exit or else application | |
1261 | * registration will not occur and tracing will never | |
1262 | * start. | |
1263 | */ | |
1264 | goto error; | |
1265 | } | |
1266 | } | |
1267 | free(ust_cmd); | |
1268 | } while (node != NULL); | |
1269 | ||
1270 | /* Futex wait on queue. Blocking call on futex() */ | |
1271 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1272 | } | |
1273 | ||
1274 | error: | |
1275 | DBG("Dispatch thread dying"); | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | /* | |
1280 | * This thread manage application registration. | |
1281 | */ | |
1282 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1283 | { |
5eb91c98 DG |
1284 | int sock = 0, i, ret, pollfd; |
1285 | uint32_t revents, nb_fd; | |
1286 | struct lttng_poll_event events; | |
099e26bd DG |
1287 | /* |
1288 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1289 | * freed in the manage apps thread. | |
1290 | */ | |
1291 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1292 | |
099e26bd | 1293 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1294 | |
1295 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1296 | if (ret < 0) { | |
1297 | goto error; | |
1298 | } | |
1299 | ||
5eb91c98 DG |
1300 | /* |
1301 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1302 | * more will be added to this poll set. | |
1303 | */ | |
1304 | ret = create_thread_poll_set(&events, 2); | |
1305 | if (ret < 0) { | |
1306 | goto error; | |
1307 | } | |
273ea72c | 1308 | |
5eb91c98 DG |
1309 | /* Add the application registration socket */ |
1310 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1311 | if (ret < 0) { | |
1312 | goto error; | |
1313 | } | |
273ea72c | 1314 | |
1d4b027a | 1315 | /* Notify all applications to register */ |
0fdd1e2c DG |
1316 | ret = notify_ust_apps(1); |
1317 | if (ret < 0) { | |
1318 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1319 | "Execution continues but there might be problem for already\n" |
1320 | "running applications that wishes to register."); | |
0fdd1e2c | 1321 | } |
1d4b027a DG |
1322 | |
1323 | while (1) { | |
1324 | DBG("Accepting application registration"); | |
273ea72c | 1325 | |
5eb91c98 DG |
1326 | nb_fd = LTTNG_POLL_GETNB(&events); |
1327 | ||
273ea72c | 1328 | /* Inifinite blocking call, waiting for transmission */ |
a8b0b341 | 1329 | restart: |
5eb91c98 | 1330 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1331 | if (ret < 0) { |
a8b0b341 MD |
1332 | /* |
1333 | * Restart interrupted system call. | |
1334 | */ | |
1335 | if (errno == EINTR) { | |
1336 | goto restart; | |
1337 | } | |
273ea72c DG |
1338 | goto error; |
1339 | } | |
1340 | ||
5eb91c98 DG |
1341 | for (i = 0; i < nb_fd; i++) { |
1342 | /* Fetch once the poll data */ | |
1343 | revents = LTTNG_POLL_GETEV(&events, i); | |
1344 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1345 | |
5eb91c98 DG |
1346 | /* Thread quit pipe has been closed. Killing thread. */ |
1347 | ret = check_thread_quit_pipe(pollfd, revents); | |
1348 | if (ret) { | |
90014c57 DG |
1349 | goto error; |
1350 | } | |
1d4b027a | 1351 | |
5eb91c98 DG |
1352 | /* Event on the registration socket */ |
1353 | if (pollfd == apps_sock) { | |
1354 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1355 | ERR("Register apps socket poll error"); | |
1356 | goto error; | |
1357 | } else if (revents & LPOLLIN) { | |
1358 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1359 | if (sock < 0) { | |
1360 | goto error; | |
1361 | } | |
099e26bd | 1362 | |
5eb91c98 | 1363 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1364 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1365 | if (ust_cmd == NULL) { |
ba7f0ae5 | 1366 | perror("ust command zmalloc"); |
5eb91c98 DG |
1367 | goto error; |
1368 | } | |
1d4b027a | 1369 | |
5eb91c98 DG |
1370 | /* |
1371 | * Using message-based transmissions to ensure we don't | |
1372 | * have to deal with partially received messages. | |
1373 | */ | |
1374 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1375 | sizeof(struct ust_register_msg)); | |
1376 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1377 | if (ret < 0) { | |
1378 | perror("lttcomm_recv_unix_sock register apps"); | |
1379 | } else { | |
1380 | ERR("Wrong size received on apps register"); | |
1381 | } | |
1382 | free(ust_cmd); | |
1383 | close(sock); | |
1384 | continue; | |
1385 | } | |
099e26bd | 1386 | |
5eb91c98 | 1387 | ust_cmd->sock = sock; |
099e26bd | 1388 | |
5eb91c98 DG |
1389 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1390 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1391 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1392 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1393 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1394 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1395 | |
5eb91c98 DG |
1396 | /* |
1397 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1398 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1399 | */ |
1400 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1401 | ||
1402 | /* | |
1403 | * Wake the registration queue futex. Implicit memory | |
1404 | * barrier with the exchange in cds_wfq_enqueue. | |
1405 | */ | |
1406 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1407 | } | |
1408 | } | |
90014c57 | 1409 | } |
1d4b027a DG |
1410 | } |
1411 | ||
1412 | error: | |
0fdd1e2c DG |
1413 | DBG("UST Registration thread dying"); |
1414 | ||
1415 | /* Notify that the registration thread is gone */ | |
1416 | notify_ust_apps(0); | |
1417 | ||
1418 | close(apps_sock); | |
1419 | close(sock); | |
273ea72c | 1420 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1421 | |
5eb91c98 DG |
1422 | lttng_poll_clean(&events); |
1423 | ||
1d4b027a DG |
1424 | return NULL; |
1425 | } | |
1426 | ||
8c0faa1d | 1427 | /* |
3bd1e081 | 1428 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1429 | * exec or it will fails. |
8c0faa1d | 1430 | */ |
3bd1e081 | 1431 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1432 | { |
1433 | int ret; | |
ee0b0061 DG |
1434 | struct timespec timeout; |
1435 | ||
1436 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1437 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1438 | |
1439 | /* Setup semaphore */ | |
3bd1e081 | 1440 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1441 | if (ret < 0) { |
3bd1e081 | 1442 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1443 | goto error; |
1444 | } | |
8c0faa1d | 1445 | |
3bd1e081 MD |
1446 | ret = pthread_create(&consumer_data->thread, NULL, |
1447 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1448 | if (ret != 0) { |
3bd1e081 | 1449 | PERROR("pthread_create consumer"); |
ee0b0061 | 1450 | ret = -1; |
8c0faa1d DG |
1451 | goto error; |
1452 | } | |
1453 | ||
ee0b0061 DG |
1454 | /* Get time for sem_timedwait absolute timeout */ |
1455 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1456 | if (ret < 0) { | |
3bd1e081 | 1457 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1458 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1459 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1460 | } else { |
1461 | /* Normal timeout if the gettime was successful */ | |
1462 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1463 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1464 | } |
8c0faa1d | 1465 | |
ee0b0061 DG |
1466 | if (ret < 0) { |
1467 | if (errno == ETIMEDOUT) { | |
1468 | /* | |
1469 | * Call has timed out so we kill the kconsumerd_thread and return | |
1470 | * an error. | |
1471 | */ | |
3bd1e081 MD |
1472 | ERR("The consumer thread was never ready. Killing it"); |
1473 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1474 | if (ret < 0) { |
3bd1e081 | 1475 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1476 | } |
1477 | } else { | |
3bd1e081 | 1478 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1479 | } |
1480 | goto error; | |
1481 | } | |
1482 | ||
3bd1e081 MD |
1483 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1484 | if (consumer_data->pid == 0) { | |
712ea556 | 1485 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1486 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1487 | goto error; |
1488 | } | |
3bd1e081 | 1489 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1490 | |
8c0faa1d DG |
1491 | return 0; |
1492 | ||
1493 | error: | |
1494 | return ret; | |
1495 | } | |
1496 | ||
d9800920 | 1497 | /* |
3bd1e081 | 1498 | * Join consumer thread |
d9800920 | 1499 | */ |
3bd1e081 | 1500 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1501 | { |
1502 | void *status; | |
1503 | int ret; | |
1504 | ||
3bd1e081 MD |
1505 | if (consumer_data->pid != 0) { |
1506 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1507 | if (ret) { |
3bd1e081 | 1508 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1509 | return ret; |
1510 | } | |
3bd1e081 | 1511 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1512 | } else { |
1513 | return 0; | |
1514 | } | |
1515 | } | |
1516 | ||
8c0faa1d | 1517 | /* |
3bd1e081 | 1518 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1519 | * |
d063d709 | 1520 | * Return pid if successful else -1. |
8c0faa1d | 1521 | */ |
3bd1e081 | 1522 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1523 | { |
1524 | int ret; | |
1525 | pid_t pid; | |
94c55f17 | 1526 | const char *consumer_to_use; |
53086306 | 1527 | const char *verbosity; |
94c55f17 | 1528 | struct stat st; |
8c0faa1d | 1529 | |
3bd1e081 | 1530 | DBG("Spawning consumerd"); |
c49dc785 | 1531 | |
8c0faa1d DG |
1532 | pid = fork(); |
1533 | if (pid == 0) { | |
1534 | /* | |
3bd1e081 | 1535 | * Exec consumerd. |
8c0faa1d | 1536 | */ |
daee5345 | 1537 | if (opt_verbose_consumer) { |
53086306 DG |
1538 | verbosity = "--verbose"; |
1539 | } else { | |
1540 | verbosity = "--quiet"; | |
1541 | } | |
3bd1e081 MD |
1542 | switch (consumer_data->type) { |
1543 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1544 | /* |
c7704d57 DG |
1545 | * Find out which consumerd to execute. We will first try the |
1546 | * 64-bit path, then the sessiond's installation directory, and | |
1547 | * fallback on the 32-bit one, | |
94c55f17 | 1548 | */ |
63a799e8 AM |
1549 | DBG3("Looking for a kernel consumer at these locations:"); |
1550 | DBG3(" 1) %s", consumerd64_bin); | |
1551 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1552 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1553 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1554 | DBG3("Found location #1"); |
94c55f17 | 1555 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1556 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1557 | DBG3("Found location #2"); |
94c55f17 | 1558 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1559 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1560 | DBG3("Found location #3"); |
eb1e0bd4 | 1561 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1562 | } else { |
63a799e8 | 1563 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1564 | break; |
1565 | } | |
1566 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1567 | execl(consumer_to_use, | |
1568 | "lttng-consumerd", verbosity, "-k", | |
1569 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1570 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1571 | NULL); | |
3bd1e081 | 1572 | break; |
7753dea8 MD |
1573 | case LTTNG_CONSUMER64_UST: |
1574 | { | |
b1e0b6b6 | 1575 | char *tmpnew = NULL; |
8f4905da MD |
1576 | |
1577 | if (consumerd64_libdir[0] != '\0') { | |
1578 | char *tmp; | |
1579 | size_t tmplen; | |
1580 | ||
1581 | tmp = getenv("LD_LIBRARY_PATH"); | |
1582 | if (!tmp) { | |
1583 | tmp = ""; | |
1584 | } | |
1585 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1586 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1587 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1588 | if (!tmpnew) { | |
1589 | ret = -ENOMEM; | |
1590 | goto error; | |
1591 | } | |
1592 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1593 | strcat(tmpnew, consumerd64_libdir); | |
1594 | if (tmp[0] != '\0') { | |
1595 | strcat(tmpnew, ":"); | |
1596 | strcat(tmpnew, tmp); | |
1597 | } | |
1598 | ret = putenv(tmpnew); | |
1599 | if (ret) { | |
1600 | ret = -errno; | |
1601 | goto error; | |
1602 | } | |
1603 | } | |
94c55f17 | 1604 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1605 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1606 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1607 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1608 | NULL); | |
8f4905da MD |
1609 | if (consumerd64_libdir[0] != '\0') { |
1610 | free(tmpnew); | |
1611 | } | |
1612 | if (ret) { | |
1613 | goto error; | |
1614 | } | |
3bd1e081 | 1615 | break; |
7753dea8 MD |
1616 | } |
1617 | case LTTNG_CONSUMER32_UST: | |
1618 | { | |
937dde8e | 1619 | char *tmpnew = NULL; |
8f4905da MD |
1620 | |
1621 | if (consumerd32_libdir[0] != '\0') { | |
1622 | char *tmp; | |
1623 | size_t tmplen; | |
1624 | ||
1625 | tmp = getenv("LD_LIBRARY_PATH"); | |
1626 | if (!tmp) { | |
1627 | tmp = ""; | |
1628 | } | |
1629 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1630 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1631 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1632 | if (!tmpnew) { | |
1633 | ret = -ENOMEM; | |
1634 | goto error; | |
1635 | } | |
1636 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1637 | strcat(tmpnew, consumerd32_libdir); | |
1638 | if (tmp[0] != '\0') { | |
1639 | strcat(tmpnew, ":"); | |
1640 | strcat(tmpnew, tmp); | |
1641 | } | |
1642 | ret = putenv(tmpnew); | |
1643 | if (ret) { | |
1644 | ret = -errno; | |
1645 | goto error; | |
1646 | } | |
1647 | } | |
94c55f17 | 1648 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1649 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1650 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1651 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1652 | NULL); | |
8f4905da MD |
1653 | if (consumerd32_libdir[0] != '\0') { |
1654 | free(tmpnew); | |
1655 | } | |
1656 | if (ret) { | |
1657 | goto error; | |
1658 | } | |
7753dea8 MD |
1659 | break; |
1660 | } | |
3bd1e081 MD |
1661 | default: |
1662 | perror("unknown consumer type"); | |
1663 | exit(EXIT_FAILURE); | |
1664 | } | |
8c0faa1d DG |
1665 | if (errno != 0) { |
1666 | perror("kernel start consumer exec"); | |
1667 | } | |
1668 | exit(EXIT_FAILURE); | |
1669 | } else if (pid > 0) { | |
1670 | ret = pid; | |
8c0faa1d | 1671 | } else { |
3bd1e081 | 1672 | perror("start consumer fork"); |
8c0faa1d | 1673 | ret = -errno; |
8c0faa1d | 1674 | } |
8f4905da | 1675 | error: |
8c0faa1d DG |
1676 | return ret; |
1677 | } | |
1678 | ||
693bd40b | 1679 | /* |
3bd1e081 | 1680 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1681 | */ |
3bd1e081 | 1682 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1683 | { |
1684 | int ret; | |
1685 | ||
3bd1e081 MD |
1686 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1687 | if (consumer_data->pid != 0) { | |
1688 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1689 | goto end; |
1690 | } | |
693bd40b | 1691 | |
3bd1e081 | 1692 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1693 | if (ret < 0) { |
3bd1e081 MD |
1694 | ERR("Spawning consumerd failed"); |
1695 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1696 | goto error; |
693bd40b | 1697 | } |
c49dc785 | 1698 | |
3bd1e081 MD |
1699 | /* Setting up the consumer_data pid */ |
1700 | consumer_data->pid = ret; | |
48842b30 | 1701 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1702 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1703 | |
3bd1e081 MD |
1704 | DBG2("Spawning consumer control thread"); |
1705 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1706 | if (ret < 0) { |
3bd1e081 | 1707 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1708 | goto error; |
1709 | } | |
1710 | ||
c49dc785 | 1711 | end: |
693bd40b DG |
1712 | return 0; |
1713 | ||
1714 | error: | |
1715 | return ret; | |
1716 | } | |
1717 | ||
b73401da | 1718 | /* |
096102bd | 1719 | * Check version of the lttng-modules. |
b73401da | 1720 | */ |
096102bd | 1721 | static int validate_lttng_modules_version(void) |
b73401da | 1722 | { |
096102bd | 1723 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1724 | } |
1725 | ||
b73401da | 1726 | /* |
096102bd | 1727 | * Setup necessary data for kernel tracer action. |
b73401da | 1728 | */ |
096102bd | 1729 | static int init_kernel_tracer(void) |
b73401da DG |
1730 | { |
1731 | int ret; | |
b73401da | 1732 | |
096102bd DG |
1733 | /* Modprobe lttng kernel modules */ |
1734 | ret = modprobe_lttng_control(); | |
b73401da | 1735 | if (ret < 0) { |
b73401da DG |
1736 | goto error; |
1737 | } | |
1738 | ||
096102bd DG |
1739 | /* Open debugfs lttng */ |
1740 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1741 | if (kernel_tracer_fd < 0) { | |
1742 | DBG("Failed to open %s", module_proc_lttng); | |
1743 | ret = -1; | |
1744 | goto error_open; | |
b73401da DG |
1745 | } |
1746 | ||
096102bd DG |
1747 | /* Validate kernel version */ |
1748 | ret = validate_lttng_modules_version(); | |
b73401da | 1749 | if (ret < 0) { |
096102bd | 1750 | goto error_version; |
b73401da DG |
1751 | } |
1752 | ||
096102bd | 1753 | ret = modprobe_lttng_data(); |
b73401da | 1754 | if (ret < 0) { |
096102bd | 1755 | goto error_modules; |
8c0faa1d DG |
1756 | } |
1757 | ||
f3ed775e | 1758 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1759 | return 0; |
1760 | ||
1761 | error_version: | |
1762 | modprobe_remove_lttng_control(); | |
1763 | close(kernel_tracer_fd); | |
1764 | kernel_tracer_fd = 0; | |
1765 | return LTTCOMM_KERN_VERSION; | |
1766 | ||
1767 | error_modules: | |
1768 | close(kernel_tracer_fd); | |
1769 | ||
1770 | error_open: | |
1771 | modprobe_remove_lttng_control(); | |
b73401da DG |
1772 | |
1773 | error: | |
b73401da DG |
1774 | WARN("No kernel tracer available"); |
1775 | kernel_tracer_fd = 0; | |
096102bd | 1776 | return LTTCOMM_KERN_NA; |
f3ed775e | 1777 | } |
33a2b854 | 1778 | |
f3ed775e | 1779 | /* |
54d01ffb | 1780 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1781 | */ |
54d01ffb | 1782 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1783 | { |
f40799e8 | 1784 | int ret = 0; |
8c0faa1d | 1785 | |
3bd1e081 | 1786 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1787 | /* |
54d01ffb DG |
1788 | * Assign default kernel consumer socket if no consumer assigned to the |
1789 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1790 | * an extra security check. | |
d9800920 DG |
1791 | */ |
1792 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1793 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1794 | } |
1795 | ||
2bdd86d4 | 1796 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1797 | if (ret < 0) { |
f3ed775e DG |
1798 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1799 | goto error; | |
1800 | } | |
1d4b027a | 1801 | |
3bd1e081 | 1802 | session->consumer_fds_sent = 1; |
f3ed775e | 1803 | } |
1d4b027a DG |
1804 | |
1805 | error: | |
1806 | return ret; | |
8c0faa1d DG |
1807 | } |
1808 | ||
0177d773 DG |
1809 | /* |
1810 | * Create an UST session and add it to the session ust list. | |
1811 | */ | |
44d3bd01 | 1812 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1813 | struct lttng_domain *domain) |
0177d773 | 1814 | { |
13384287 | 1815 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1816 | int ret; |
44d3bd01 DG |
1817 | |
1818 | switch (domain->type) { | |
48842b30 | 1819 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1820 | break; |
1821 | default: | |
13384287 | 1822 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1823 | goto error; |
1824 | } | |
0177d773 DG |
1825 | |
1826 | DBG("Creating UST session"); | |
1827 | ||
a991f516 | 1828 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1829 | if (lus == NULL) { |
44d3bd01 | 1830 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1831 | goto error; |
1832 | } | |
1833 | ||
e11d277b | 1834 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1835 | session->uid, session->gid); |
0177d773 DG |
1836 | if (ret < 0) { |
1837 | if (ret != -EEXIST) { | |
1838 | ERR("Trace directory creation error"); | |
44d3bd01 | 1839 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1840 | goto error; |
1841 | } | |
1842 | } | |
1843 | ||
f6a9efaa DG |
1844 | /* The domain type dictate different actions on session creation */ |
1845 | switch (domain->type) { | |
48842b30 DG |
1846 | case LTTNG_DOMAIN_UST: |
1847 | /* No ustctl for the global UST domain */ | |
1848 | break; | |
1849 | default: | |
36dc12cc | 1850 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1851 | goto error; |
0177d773 | 1852 | } |
6df2e2c9 MD |
1853 | lus->uid = session->uid; |
1854 | lus->gid = session->gid; | |
f6a9efaa | 1855 | session->ust_session = lus; |
44d3bd01 DG |
1856 | |
1857 | return LTTCOMM_OK; | |
0177d773 DG |
1858 | |
1859 | error: | |
1860 | free(lus); | |
1861 | return ret; | |
1862 | } | |
1863 | ||
333f285e | 1864 | /* |
d063d709 | 1865 | * Create a kernel tracer session then create the default channel. |
333f285e | 1866 | */ |
6df2e2c9 | 1867 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1868 | { |
f3ed775e | 1869 | int ret; |
f3ed775e DG |
1870 | |
1871 | DBG("Creating kernel session"); | |
1872 | ||
1873 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1874 | if (ret < 0) { | |
1875 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1876 | goto error; | |
333f285e DG |
1877 | } |
1878 | ||
d9800920 | 1879 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1880 | if (kconsumer_data.cmd_sock) { |
1881 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1882 | } |
1883 | ||
e11d277b | 1884 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1885 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1886 | if (ret < 0) { |
996b65c8 | 1887 | if (ret != -EEXIST) { |
7a485870 DG |
1888 | ERR("Trace directory creation error"); |
1889 | goto error; | |
1890 | } | |
1891 | } | |
6df2e2c9 MD |
1892 | session->kernel_session->uid = session->uid; |
1893 | session->kernel_session->gid = session->gid; | |
7a485870 | 1894 | |
f3ed775e DG |
1895 | error: |
1896 | return ret; | |
333f285e DG |
1897 | } |
1898 | ||
8e0af1b4 | 1899 | /* |
c7704d57 DG |
1900 | * Check if the UID or GID match the session. Root user has access to all |
1901 | * sessions. | |
8e0af1b4 | 1902 | */ |
c7704d57 | 1903 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1904 | { |
c7704d57 | 1905 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1906 | return 0; |
1907 | } else { | |
1908 | return 1; | |
1909 | } | |
1910 | } | |
1911 | ||
1912 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1913 | { | |
1914 | unsigned int i = 0; | |
1915 | struct ltt_session *session; | |
1916 | ||
1917 | DBG("Counting number of available session for UID %d GID %d", | |
1918 | uid, gid); | |
1919 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1920 | /* | |
1921 | * Only list the sessions the user can control. | |
1922 | */ | |
1923 | if (!session_access_ok(session, uid, gid)) { | |
1924 | continue; | |
1925 | } | |
1926 | i++; | |
1927 | } | |
1928 | return i; | |
1929 | } | |
1930 | ||
6c9cc2ab DG |
1931 | /* |
1932 | * Using the session list, filled a lttng_session array to send back to the | |
1933 | * client for session listing. | |
1934 | * | |
1935 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1936 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 1937 | */ |
c7704d57 DG |
1938 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
1939 | gid_t gid) | |
6c9cc2ab | 1940 | { |
8e0af1b4 | 1941 | unsigned int i = 0; |
6c9cc2ab DG |
1942 | struct ltt_session *session; |
1943 | ||
8e0af1b4 MD |
1944 | DBG("Getting all available session for UID %d GID %d", |
1945 | uid, gid); | |
6c9cc2ab DG |
1946 | /* |
1947 | * Iterate over session list and append data after the control struct in | |
1948 | * the buffer. | |
1949 | */ | |
1950 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
1951 | /* |
1952 | * Only list the sessions the user can control. | |
1953 | */ | |
1954 | if (!session_access_ok(session, uid, gid)) { | |
1955 | continue; | |
1956 | } | |
6c9cc2ab | 1957 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 1958 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1959 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1960 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 1961 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
1962 | i++; |
1963 | } | |
1964 | } | |
1965 | ||
9f19cc17 DG |
1966 | /* |
1967 | * Fill lttng_channel array of all channels. | |
1968 | */ | |
b551a063 | 1969 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
1970 | struct lttng_channel *channels) |
1971 | { | |
1972 | int i = 0; | |
1973 | struct ltt_kernel_channel *kchan; | |
1974 | ||
1975 | DBG("Listing channels for session %s", session->name); | |
1976 | ||
b551a063 DG |
1977 | switch (domain) { |
1978 | case LTTNG_DOMAIN_KERNEL: | |
1979 | /* Kernel channels */ | |
1980 | if (session->kernel_session != NULL) { | |
1981 | cds_list_for_each_entry(kchan, | |
1982 | &session->kernel_session->channel_list.head, list) { | |
1983 | /* Copy lttng_channel struct to array */ | |
1984 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1985 | channels[i].enabled = kchan->enabled; | |
1986 | i++; | |
1987 | } | |
1988 | } | |
1989 | break; | |
1990 | case LTTNG_DOMAIN_UST: | |
1991 | { | |
bec39940 | 1992 | struct lttng_ht_iter iter; |
b551a063 DG |
1993 | struct ltt_ust_channel *uchan; |
1994 | ||
bec39940 DG |
1995 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
1996 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
1997 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
1998 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
1999 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
2000 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
2001 | channels[i].attr.switch_timer_interval = | |
2002 | uchan->attr.switch_timer_interval; | |
2003 | channels[i].attr.read_timer_interval = | |
2004 | uchan->attr.read_timer_interval; | |
aea829b3 | 2005 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
2006 | switch (uchan->attr.output) { |
2007 | case LTTNG_UST_MMAP: | |
2008 | default: | |
2009 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
2010 | break; | |
2011 | } | |
befe0905 | 2012 | i++; |
b551a063 DG |
2013 | } |
2014 | break; | |
2015 | } | |
2016 | default: | |
2017 | break; | |
2018 | } | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * Create a list of ust global domain events. | |
2023 | */ | |
2024 | static int list_lttng_ust_global_events(char *channel_name, | |
2025 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
2026 | { | |
2027 | int i = 0, ret = 0; | |
2028 | unsigned int nb_event = 0; | |
bec39940 DG |
2029 | struct lttng_ht_iter iter; |
2030 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2031 | struct ltt_ust_channel *uchan; |
2032 | struct ltt_ust_event *uevent; | |
2033 | struct lttng_event *tmp; | |
2034 | ||
2035 | DBG("Listing UST global events for channel %s", channel_name); | |
2036 | ||
2037 | rcu_read_lock(); | |
2038 | ||
bec39940 DG |
2039 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2040 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2041 | if (node == NULL) { |
2042 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2043 | goto error; | |
b551a063 DG |
2044 | } |
2045 | ||
bec39940 | 2046 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2047 | |
bec39940 | 2048 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2049 | |
b551a063 DG |
2050 | if (nb_event == 0) { |
2051 | ret = nb_event; | |
2052 | goto error; | |
2053 | } | |
2054 | ||
2055 | DBG3("Listing UST global %d events", nb_event); | |
2056 | ||
2057 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2058 | if (tmp == NULL) { | |
2059 | ret = -LTTCOMM_FATAL; | |
2060 | goto error; | |
2061 | } | |
2062 | ||
bec39940 | 2063 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2064 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2065 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2066 | tmp[i].enabled = uevent->enabled; | |
2067 | switch (uevent->attr.instrumentation) { | |
2068 | case LTTNG_UST_TRACEPOINT: | |
2069 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2070 | break; | |
2071 | case LTTNG_UST_PROBE: | |
2072 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2073 | break; | |
2074 | case LTTNG_UST_FUNCTION: | |
2075 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2076 | break; | |
0cda4f28 | 2077 | } |
8005f29a | 2078 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2079 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2080 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2081 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2082 | break; |
8005f29a | 2083 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2084 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2085 | break; |
2086 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2087 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2088 | break; |
9f19cc17 | 2089 | } |
d7b75b30 | 2090 | i++; |
9f19cc17 DG |
2091 | } |
2092 | ||
b551a063 DG |
2093 | ret = nb_event; |
2094 | *events = tmp; | |
2095 | ||
2096 | error: | |
2097 | rcu_read_unlock(); | |
2098 | return ret; | |
9f19cc17 DG |
2099 | } |
2100 | ||
2101 | /* | |
b551a063 | 2102 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2103 | */ |
b551a063 DG |
2104 | static int list_lttng_kernel_events(char *channel_name, |
2105 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2106 | { |
b551a063 DG |
2107 | int i = 0, ret; |
2108 | unsigned int nb_event; | |
9f19cc17 | 2109 | struct ltt_kernel_event *event; |
b551a063 DG |
2110 | struct ltt_kernel_channel *kchan; |
2111 | ||
2112 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2113 | if (kchan == NULL) { | |
2114 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2115 | goto error; | |
2116 | } | |
2117 | ||
2118 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2119 | |
2120 | DBG("Listing events for channel %s", kchan->channel->name); | |
2121 | ||
b551a063 DG |
2122 | if (nb_event == 0) { |
2123 | ret = nb_event; | |
2124 | goto error; | |
2125 | } | |
2126 | ||
2127 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2128 | if (*events == NULL) { | |
2129 | ret = LTTCOMM_FATAL; | |
2130 | goto error; | |
2131 | } | |
2132 | ||
9f19cc17 DG |
2133 | /* Kernel channels */ |
2134 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2135 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2136 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2137 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2138 | switch (event->event->instrumentation) { |
2139 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2140 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2141 | break; |
2142 | case LTTNG_KERNEL_KPROBE: | |
2143 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2144 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2145 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2146 | sizeof(struct lttng_kernel_kprobe)); |
2147 | break; | |
2148 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2149 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2150 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2151 | sizeof(struct lttng_kernel_function)); |
2152 | break; | |
0133c199 | 2153 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2154 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2155 | break; |
a54bd42d | 2156 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2157 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2158 | break; |
7a3d1328 MD |
2159 | case LTTNG_KERNEL_ALL: |
2160 | assert(0); | |
2161 | break; | |
9f19cc17 DG |
2162 | } |
2163 | i++; | |
2164 | } | |
b551a063 DG |
2165 | |
2166 | return nb_event; | |
2167 | ||
2168 | error: | |
2169 | return ret; | |
9f19cc17 DG |
2170 | } |
2171 | ||
fac6795d | 2172 | /* |
54d01ffb | 2173 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2174 | */ |
54d01ffb DG |
2175 | static int cmd_disable_channel(struct ltt_session *session, |
2176 | int domain, char *channel_name) | |
fac6795d | 2177 | { |
54d01ffb | 2178 | int ret; |
78f0bacd DG |
2179 | struct ltt_ust_session *usess; |
2180 | ||
2181 | usess = session->ust_session; | |
379473d2 | 2182 | |
54d01ffb | 2183 | switch (domain) { |
78f0bacd DG |
2184 | case LTTNG_DOMAIN_KERNEL: |
2185 | { | |
2186 | ret = channel_kernel_disable(session->kernel_session, | |
2187 | channel_name); | |
2188 | if (ret != LTTCOMM_OK) { | |
2189 | goto error; | |
2190 | } | |
54d01ffb | 2191 | |
78f0bacd DG |
2192 | kernel_wait_quiescent(kernel_tracer_fd); |
2193 | break; | |
2194 | } | |
2195 | case LTTNG_DOMAIN_UST: | |
2196 | { | |
2197 | struct ltt_ust_channel *uchan; | |
bec39940 | 2198 | struct lttng_ht *chan_ht; |
78f0bacd | 2199 | |
7885e399 DG |
2200 | chan_ht = usess->domain_global.channels; |
2201 | ||
2202 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2203 | if (uchan == NULL) { |
2204 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2205 | goto error; |
78f0bacd DG |
2206 | } |
2207 | ||
7885e399 DG |
2208 | ret = channel_ust_disable(usess, domain, uchan); |
2209 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2210 | goto error; |
2211 | } | |
78f0bacd DG |
2212 | break; |
2213 | } | |
d78d6610 | 2214 | #if 0 |
78f0bacd DG |
2215 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2216 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2217 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2218 | #endif |
78f0bacd DG |
2219 | default: |
2220 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2221 | goto error; | |
20fe2104 DG |
2222 | } |
2223 | ||
54d01ffb | 2224 | ret = LTTCOMM_OK; |
d65106b1 | 2225 | |
54d01ffb DG |
2226 | error: |
2227 | return ret; | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2232 | */ | |
44d3bd01 | 2233 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2234 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2235 | { |
2236 | int ret; | |
f6a9efaa | 2237 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2238 | struct lttng_ht *chan_ht; |
f6a9efaa | 2239 | |
5d56b5aa | 2240 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2241 | |
aea829b3 | 2242 | switch (domain) { |
44d3bd01 DG |
2243 | case LTTNG_DOMAIN_KERNEL: |
2244 | { | |
2245 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2246 | |
44d3bd01 DG |
2247 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2248 | session->kernel_session); | |
2249 | if (kchan == NULL) { | |
2250 | ret = channel_kernel_create(session->kernel_session, | |
2251 | attr, kernel_poll_pipe[1]); | |
2252 | } else { | |
2253 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2254 | } | |
2255 | ||
2256 | if (ret != LTTCOMM_OK) { | |
2257 | goto error; | |
2258 | } | |
2259 | ||
2260 | kernel_wait_quiescent(kernel_tracer_fd); | |
2261 | break; | |
2262 | } | |
f6a9efaa DG |
2263 | case LTTNG_DOMAIN_UST: |
2264 | { | |
2265 | struct ltt_ust_channel *uchan; | |
2266 | ||
7885e399 | 2267 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2268 | |
7885e399 | 2269 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2270 | if (uchan == NULL) { |
7885e399 | 2271 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2272 | } else { |
7885e399 | 2273 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2274 | } |
f6a9efaa DG |
2275 | break; |
2276 | } | |
d78d6610 | 2277 | #if 0 |
78f0bacd DG |
2278 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2279 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2280 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2281 | #endif |
44d3bd01 DG |
2282 | default: |
2283 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2284 | goto error; | |
54d01ffb DG |
2285 | } |
2286 | ||
54d01ffb DG |
2287 | error: |
2288 | return ret; | |
2289 | } | |
2290 | ||
2291 | /* | |
2292 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2293 | */ | |
2294 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2295 | char *channel_name, char *event_name) | |
2296 | { | |
2297 | int ret; | |
54d01ffb DG |
2298 | |
2299 | switch (domain) { | |
2300 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2301 | { |
2302 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2303 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2304 | |
b0a40d28 DG |
2305 | ksess = session->kernel_session; |
2306 | ||
2307 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2308 | if (kchan == NULL) { |
2309 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2310 | goto error; | |
d65106b1 DG |
2311 | } |
2312 | ||
b0a40d28 | 2313 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2314 | if (ret != LTTCOMM_OK) { |
2315 | goto error; | |
2316 | } | |
2317 | ||
2318 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2319 | break; |
2bdd86d4 MD |
2320 | } |
2321 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2322 | { |
b0a40d28 | 2323 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2324 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2325 | |
2326 | usess = session->ust_session; | |
2327 | ||
2328 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2329 | channel_name); | |
2330 | if (uchan == NULL) { | |
2331 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2332 | goto error; | |
2333 | } | |
2334 | ||
7f79d3a1 DG |
2335 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2336 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2337 | goto error; |
2338 | } | |
2339 | ||
7f79d3a1 | 2340 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2341 | channel_name); |
b0a40d28 DG |
2342 | break; |
2343 | } | |
d78d6610 | 2344 | #if 0 |
2bdd86d4 MD |
2345 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2346 | case LTTNG_DOMAIN_UST_PID: | |
2347 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2348 | #endif |
54d01ffb | 2349 | default: |
1ab1ea0b | 2350 | ret = LTTCOMM_UND; |
54d01ffb | 2351 | goto error; |
d65106b1 | 2352 | } |
26cc6b4e | 2353 | |
54d01ffb DG |
2354 | ret = LTTCOMM_OK; |
2355 | ||
2356 | error: | |
2357 | return ret; | |
2358 | } | |
2359 | ||
2360 | /* | |
2361 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2362 | */ | |
2363 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2364 | char *channel_name) | |
2365 | { | |
2366 | int ret; | |
54d01ffb DG |
2367 | |
2368 | switch (domain) { | |
2369 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2370 | { |
2371 | struct ltt_kernel_session *ksess; | |
2372 | struct ltt_kernel_channel *kchan; | |
2373 | ||
2374 | ksess = session->kernel_session; | |
2375 | ||
2376 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2377 | if (kchan == NULL) { |
2378 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2379 | goto error; | |
26cc6b4e DG |
2380 | } |
2381 | ||
9730260e | 2382 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2383 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2384 | goto error; |
26cc6b4e DG |
2385 | } |
2386 | ||
54d01ffb | 2387 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2388 | break; |
9730260e DG |
2389 | } |
2390 | case LTTNG_DOMAIN_UST: | |
2391 | { | |
2392 | struct ltt_ust_session *usess; | |
2393 | struct ltt_ust_channel *uchan; | |
2394 | ||
2395 | usess = session->ust_session; | |
2396 | ||
2397 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2398 | channel_name); | |
2399 | if (uchan == NULL) { | |
2400 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2401 | goto error; | |
2402 | } | |
2403 | ||
7f79d3a1 DG |
2404 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2405 | if (ret != 0) { | |
9730260e DG |
2406 | goto error; |
2407 | } | |
2408 | ||
7f79d3a1 | 2409 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2410 | |
2411 | break; | |
2412 | } | |
d78d6610 | 2413 | #if 0 |
9730260e DG |
2414 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2415 | case LTTNG_DOMAIN_UST_PID: | |
2416 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2417 | #endif |
54d01ffb | 2418 | default: |
1ab1ea0b | 2419 | ret = LTTCOMM_UND; |
54d01ffb | 2420 | goto error; |
26cc6b4e | 2421 | } |
e953ef25 | 2422 | |
54d01ffb | 2423 | ret = LTTCOMM_OK; |
e953ef25 | 2424 | |
54d01ffb DG |
2425 | error: |
2426 | return ret; | |
2427 | } | |
f5177a38 | 2428 | |
54d01ffb DG |
2429 | /* |
2430 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2431 | */ | |
2432 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2433 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2434 | { | |
2435 | int ret; | |
f5177a38 | 2436 | |
54d01ffb DG |
2437 | switch (domain) { |
2438 | case LTTNG_DOMAIN_KERNEL: | |
2439 | /* Add kernel context to kernel tracer */ | |
2440 | ret = context_kernel_add(session->kernel_session, ctx, | |
2441 | event_name, channel_name); | |
2442 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2443 | goto error; |
e953ef25 | 2444 | } |
2bdd86d4 MD |
2445 | break; |
2446 | case LTTNG_DOMAIN_UST: | |
2447 | { | |
55cc08a6 | 2448 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2449 | |
55cc08a6 DG |
2450 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2451 | if (ret != LTTCOMM_OK) { | |
2452 | goto error; | |
2bdd86d4 | 2453 | } |
e953ef25 | 2454 | break; |
2bdd86d4 | 2455 | } |
d78d6610 | 2456 | #if 0 |
55cc08a6 DG |
2457 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2458 | case LTTNG_DOMAIN_UST_PID: | |
2459 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2460 | #endif |
54d01ffb | 2461 | default: |
1ab1ea0b | 2462 | ret = LTTCOMM_UND; |
54d01ffb | 2463 | goto error; |
e953ef25 | 2464 | } |
950131af | 2465 | |
54d01ffb | 2466 | ret = LTTCOMM_OK; |
950131af | 2467 | |
54d01ffb DG |
2468 | error: |
2469 | return ret; | |
2470 | } | |
2471 | ||
2472 | /* | |
2473 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2474 | */ | |
2475 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2476 | char *channel_name, struct lttng_event *event) | |
2477 | { | |
2478 | int ret; | |
f6cd6b0f | 2479 | struct lttng_channel *attr; |
48842b30 | 2480 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2481 | |
2482 | switch (domain) { | |
2483 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2484 | { |
2485 | struct ltt_kernel_channel *kchan; | |
2486 | ||
54d01ffb DG |
2487 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2488 | session->kernel_session); | |
2489 | if (kchan == NULL) { | |
f6cd6b0f DG |
2490 | attr = channel_new_default_attr(domain); |
2491 | if (attr == NULL) { | |
2492 | ret = LTTCOMM_FATAL; | |
2493 | goto error; | |
2494 | } | |
2495 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2496 | ||
54d01ffb | 2497 | /* This call will notify the kernel thread */ |
44d3bd01 | 2498 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2499 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2500 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2501 | free(attr); |
f5177a38 DG |
2502 | goto error; |
2503 | } | |
ff4d74e6 | 2504 | free(attr); |
54d01ffb | 2505 | } |
950131af | 2506 | |
54d01ffb DG |
2507 | /* Get the newly created kernel channel pointer */ |
2508 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2509 | session->kernel_session); | |
2510 | if (kchan == NULL) { | |
2511 | /* This sould not happen... */ | |
2512 | ret = LTTCOMM_FATAL; | |
2513 | goto error; | |
2514 | } | |
f5177a38 | 2515 | |
48842b30 DG |
2516 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2517 | event); | |
54d01ffb | 2518 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2519 | goto error; |
950131af DG |
2520 | } |
2521 | ||
54d01ffb | 2522 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2523 | break; |
2bdd86d4 MD |
2524 | } |
2525 | case LTTNG_DOMAIN_UST: | |
2526 | { | |
aea829b3 | 2527 | struct lttng_channel *attr; |
edb67388 | 2528 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2529 | |
edb67388 | 2530 | /* Get channel from global UST domain */ |
48842b30 DG |
2531 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2532 | channel_name); | |
2533 | if (uchan == NULL) { | |
aea829b3 DG |
2534 | /* Create default channel */ |
2535 | attr = channel_new_default_attr(domain); | |
2536 | if (attr == NULL) { | |
2537 | ret = LTTCOMM_FATAL; | |
2538 | goto error; | |
2539 | } | |
596219f7 | 2540 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2541 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2542 | |
7885e399 | 2543 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2544 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2545 | free(attr); |
aea829b3 DG |
2546 | goto error; |
2547 | } | |
aea829b3 DG |
2548 | free(attr); |
2549 | ||
2550 | /* Get the newly created channel reference back */ | |
2551 | uchan = trace_ust_find_channel_by_name( | |
2552 | usess->domain_global.channels, channel_name); | |
2553 | if (uchan == NULL) { | |
2554 | /* Something is really wrong */ | |
2555 | ret = LTTCOMM_FATAL; | |
2556 | goto error; | |
2557 | } | |
48842b30 | 2558 | } |
2bdd86d4 | 2559 | |
edb67388 | 2560 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2561 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2562 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2563 | goto error; |
2bdd86d4 MD |
2564 | } |
2565 | break; | |
2566 | } | |
d78d6610 | 2567 | #if 0 |
2bdd86d4 MD |
2568 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2569 | case LTTNG_DOMAIN_UST_PID: | |
2570 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2571 | #endif |
54d01ffb | 2572 | default: |
1ab1ea0b | 2573 | ret = LTTCOMM_UND; |
54d01ffb | 2574 | goto error; |
950131af | 2575 | } |
d36b8583 | 2576 | |
54d01ffb | 2577 | ret = LTTCOMM_OK; |
d36b8583 | 2578 | |
54d01ffb DG |
2579 | error: |
2580 | return ret; | |
2581 | } | |
7d29a247 | 2582 | |
54d01ffb DG |
2583 | /* |
2584 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2585 | */ | |
2586 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2587 | char *channel_name, int event_type) |
54d01ffb DG |
2588 | { |
2589 | int ret; | |
2590 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2591 | |
54d01ffb DG |
2592 | switch (domain) { |
2593 | case LTTNG_DOMAIN_KERNEL: | |
2594 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2595 | session->kernel_session); | |
2596 | if (kchan == NULL) { | |
2597 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2598 | ret = channel_kernel_create(session->kernel_session, NULL, |
2599 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2600 | if (ret != LTTCOMM_OK) { |
2601 | goto error; | |
d36b8583 | 2602 | } |
0d0c377a | 2603 | |
8f69e5eb DG |
2604 | /* Get the newly created kernel channel pointer */ |
2605 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2606 | session->kernel_session); | |
2607 | if (kchan == NULL) { | |
2608 | /* This sould not happen... */ | |
2609 | ret = LTTCOMM_FATAL; | |
2610 | goto error; | |
2611 | } | |
2612 | ||
54d01ffb | 2613 | } |
0fdd1e2c | 2614 | |
7a3d1328 | 2615 | switch (event_type) { |
76d45b40 | 2616 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2617 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2618 | kchan, kernel_tracer_fd); |
7a3d1328 | 2619 | break; |
76d45b40 | 2620 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2621 | /* |
7a3d1328 MD |
2622 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2623 | * events already registered to the channel. | |
8c9ae521 | 2624 | */ |
7a3d1328 MD |
2625 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2626 | kchan, kernel_tracer_fd); | |
2627 | break; | |
76d45b40 | 2628 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2629 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2630 | ret = event_kernel_enable_all(session->kernel_session, |
2631 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2632 | break; |
2633 | default: | |
2634 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2635 | goto error; | |
8c9ae521 | 2636 | } |
8f69e5eb DG |
2637 | |
2638 | /* Manage return value */ | |
54d01ffb | 2639 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2640 | goto error; |
d36b8583 DG |
2641 | } |
2642 | ||
54d01ffb | 2643 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2644 | break; |
76d45b40 DG |
2645 | case LTTNG_DOMAIN_UST: |
2646 | { | |
2647 | struct lttng_channel *attr; | |
2648 | struct ltt_ust_channel *uchan; | |
2649 | struct ltt_ust_session *usess = session->ust_session; | |
2650 | ||
2651 | /* Get channel from global UST domain */ | |
2652 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2653 | channel_name); | |
2654 | if (uchan == NULL) { | |
2655 | /* Create default channel */ | |
2656 | attr = channel_new_default_attr(domain); | |
2657 | if (attr == NULL) { | |
2658 | ret = LTTCOMM_FATAL; | |
2659 | goto error; | |
2660 | } | |
2661 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2662 | attr->name[NAME_MAX - 1] = '\0'; | |
2663 | ||
2664 | /* Use the internal command enable channel */ | |
7885e399 | 2665 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2666 | if (ret != LTTCOMM_OK) { |
2667 | free(attr); | |
2668 | goto error; | |
2669 | } | |
2670 | free(attr); | |
2671 | ||
2672 | /* Get the newly created channel reference back */ | |
2673 | uchan = trace_ust_find_channel_by_name( | |
2674 | usess->domain_global.channels, channel_name); | |
2675 | if (uchan == NULL) { | |
2676 | /* Something is really wrong */ | |
2677 | ret = LTTCOMM_FATAL; | |
2678 | goto error; | |
2679 | } | |
2680 | } | |
2681 | ||
2682 | /* At this point, the session and channel exist on the tracer */ | |
2683 | ||
2684 | switch (event_type) { | |
2685 | case LTTNG_EVENT_ALL: | |
2686 | case LTTNG_EVENT_TRACEPOINT: | |
2687 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2688 | if (ret != LTTCOMM_OK) { | |
2689 | goto error; | |
2690 | } | |
2691 | break; | |
2692 | default: | |
2693 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2694 | goto error; | |
2695 | } | |
2696 | ||
2697 | /* Manage return value */ | |
2698 | if (ret != LTTCOMM_OK) { | |
2699 | goto error; | |
2700 | } | |
2701 | ||
2702 | break; | |
2703 | } | |
d78d6610 | 2704 | #if 0 |
76d45b40 DG |
2705 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2706 | case LTTNG_DOMAIN_UST_PID: | |
2707 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2708 | #endif |
54d01ffb | 2709 | default: |
1ab1ea0b | 2710 | ret = LTTCOMM_UND; |
54d01ffb | 2711 | goto error; |
d36b8583 | 2712 | } |
f3ed775e | 2713 | |
54d01ffb DG |
2714 | ret = LTTCOMM_OK; |
2715 | ||
2716 | error: | |
2717 | return ret; | |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2722 | */ | |
2723 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2724 | { | |
2725 | int ret; | |
2726 | ssize_t nb_events = 0; | |
2727 | ||
2728 | switch (domain) { | |
2729 | case LTTNG_DOMAIN_KERNEL: | |
2730 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2731 | if (nb_events < 0) { | |
2732 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2733 | goto error; | |
894be886 | 2734 | } |
54d01ffb | 2735 | break; |
b551a063 DG |
2736 | case LTTNG_DOMAIN_UST: |
2737 | nb_events = ust_app_list_events(events); | |
2738 | if (nb_events < 0) { | |
2739 | ret = LTTCOMM_UST_LIST_FAIL; | |
2740 | goto error; | |
2741 | } | |
2742 | break; | |
54d01ffb | 2743 | default: |
1ab1ea0b | 2744 | ret = LTTCOMM_UND; |
54d01ffb DG |
2745 | goto error; |
2746 | } | |
894be886 | 2747 | |
54d01ffb | 2748 | return nb_events; |
7d29a247 | 2749 | |
54d01ffb DG |
2750 | error: |
2751 | /* Return negative value to differentiate return code */ | |
2752 | return -ret; | |
2753 | } | |
b389abbe | 2754 | |
54d01ffb DG |
2755 | /* |
2756 | * Command LTTNG_START_TRACE processed by the client thread. | |
2757 | */ | |
2758 | static int cmd_start_trace(struct ltt_session *session) | |
2759 | { | |
2760 | int ret; | |
54d01ffb | 2761 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2762 | struct ltt_ust_session *usess; |
b389abbe | 2763 | |
54d01ffb DG |
2764 | /* Short cut */ |
2765 | ksession = session->kernel_session; | |
b9d9b220 | 2766 | usess = session->ust_session; |
5eb91c98 | 2767 | |
b9ef1c83 DG |
2768 | if (session->enabled) { |
2769 | ret = LTTCOMM_UST_START_FAIL; | |
2770 | goto error; | |
2771 | } | |
2772 | ||
464dd62d MD |
2773 | session->enabled = 1; |
2774 | ||
54d01ffb DG |
2775 | /* Kernel tracing */ |
2776 | if (ksession != NULL) { | |
2bdd86d4 MD |
2777 | struct ltt_kernel_channel *kchan; |
2778 | ||
54d01ffb DG |
2779 | /* Open kernel metadata */ |
2780 | if (ksession->metadata == NULL) { | |
2781 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2782 | if (ret < 0) { | |
2783 | ret = LTTCOMM_KERN_META_FAIL; | |
2784 | goto error; | |
b389abbe | 2785 | } |
54d01ffb | 2786 | } |
7d29a247 | 2787 | |
54d01ffb DG |
2788 | /* Open kernel metadata stream */ |
2789 | if (ksession->metadata_stream_fd == 0) { | |
2790 | ret = kernel_open_metadata_stream(ksession); | |
2791 | if (ret < 0) { | |
2792 | ERR("Kernel create metadata stream failed"); | |
2793 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2794 | goto error; | |
2795 | } | |
2796 | } | |
2797 | ||
2798 | /* For each channel */ | |
2799 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2800 | if (kchan->stream_count == 0) { | |
2801 | ret = kernel_open_channel_stream(kchan); | |
2802 | if (ret < 0) { | |
2803 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2804 | goto error; |
2805 | } | |
54d01ffb DG |
2806 | /* Update the stream global counter */ |
2807 | ksession->stream_count_global += ret; | |
7d29a247 | 2808 | } |
54d01ffb DG |
2809 | } |
2810 | ||
2811 | /* Setup kernel consumer socket and send fds to it */ | |
2812 | ret = init_kernel_tracing(ksession); | |
2813 | if (ret < 0) { | |
2814 | ret = LTTCOMM_KERN_START_FAIL; | |
2815 | goto error; | |
2816 | } | |
2817 | ||
2818 | /* This start the kernel tracing */ | |
2819 | ret = kernel_start_session(ksession); | |
2820 | if (ret < 0) { | |
2821 | ret = LTTCOMM_KERN_START_FAIL; | |
2822 | goto error; | |
2823 | } | |
2824 | ||
2825 | /* Quiescent wait after starting trace */ | |
2826 | kernel_wait_quiescent(kernel_tracer_fd); | |
2827 | } | |
2828 | ||
36dc12cc | 2829 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2830 | if (usess) { |
2831 | usess->start_trace = 1; | |
36dc12cc | 2832 | |
b9d9b220 DG |
2833 | ret = ust_app_start_trace_all(usess); |
2834 | if (ret < 0) { | |
2835 | ret = LTTCOMM_UST_START_FAIL; | |
2836 | goto error; | |
2837 | } | |
2bdd86d4 | 2838 | } |
54d01ffb DG |
2839 | |
2840 | ret = LTTCOMM_OK; | |
2841 | ||
2842 | error: | |
2843 | return ret; | |
2844 | } | |
2845 | ||
2846 | /* | |
2847 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2848 | */ | |
2849 | static int cmd_stop_trace(struct ltt_session *session) | |
2850 | { | |
2851 | int ret; | |
2852 | struct ltt_kernel_channel *kchan; | |
2853 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2854 | struct ltt_ust_session *usess; |
54d01ffb DG |
2855 | |
2856 | /* Short cut */ | |
2857 | ksession = session->kernel_session; | |
8be98f9a | 2858 | usess = session->ust_session; |
54d01ffb | 2859 | |
b9ef1c83 | 2860 | if (!session->enabled) { |
190df5ac | 2861 | ret = LTTCOMM_UST_STOP_FAIL; |
b9ef1c83 DG |
2862 | goto error; |
2863 | } | |
2864 | ||
464dd62d MD |
2865 | session->enabled = 0; |
2866 | ||
54d01ffb DG |
2867 | /* Kernel tracer */ |
2868 | if (ksession != NULL) { | |
2869 | DBG("Stop kernel tracing"); | |
2870 | ||
2871 | /* Flush all buffers before stopping */ | |
2872 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2873 | if (ret < 0) { | |
2874 | ERR("Kernel metadata flush failed"); | |
2875 | } | |
f34daff7 | 2876 | |
54d01ffb DG |
2877 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2878 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2879 | if (ret < 0) { |
54d01ffb | 2880 | ERR("Kernel flush buffer error"); |
7d29a247 | 2881 | } |
54d01ffb | 2882 | } |
19e70852 | 2883 | |
54d01ffb DG |
2884 | ret = kernel_stop_session(ksession); |
2885 | if (ret < 0) { | |
2886 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2887 | goto error; |
f3ed775e | 2888 | } |
54d01ffb DG |
2889 | |
2890 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2891 | } |
54d01ffb | 2892 | |
8be98f9a MD |
2893 | if (usess) { |
2894 | usess->start_trace = 0; | |
2bdd86d4 | 2895 | |
8be98f9a | 2896 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2897 | if (ret < 0) { |
190df5ac | 2898 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2899 | goto error; |
2900 | } | |
2bdd86d4 | 2901 | } |
54d01ffb DG |
2902 | |
2903 | ret = LTTCOMM_OK; | |
2904 | ||
2905 | error: | |
2906 | return ret; | |
2907 | } | |
2908 | ||
2909 | /* | |
2910 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2911 | */ | |
ca4537d3 | 2912 | static int cmd_create_session(char *name, char *path, struct ucred *creds) |
54d01ffb DG |
2913 | { |
2914 | int ret; | |
2915 | ||
ca4537d3 | 2916 | ret = session_create(name, path, creds->uid, creds->gid); |
54d01ffb DG |
2917 | if (ret != LTTCOMM_OK) { |
2918 | goto error; | |
2919 | } | |
2920 | ||
2921 | ret = LTTCOMM_OK; | |
2922 | ||
2923 | error: | |
2924 | return ret; | |
2925 | } | |
2926 | ||
2927 | /* | |
2928 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2929 | */ | |
2930 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2931 | { | |
2932 | int ret; | |
2933 | ||
2934 | /* Clean kernel session teardown */ | |
2935 | teardown_kernel_session(session); | |
84cd17c6 MD |
2936 | /* UST session teardown */ |
2937 | teardown_ust_session(session); | |
54d01ffb DG |
2938 | |
2939 | /* | |
2940 | * Must notify the kernel thread here to update it's poll setin order | |
2941 | * to remove the channel(s)' fd just destroyed. | |
2942 | */ | |
2943 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2944 | if (ret < 0) { | |
2945 | perror("write kernel poll pipe"); | |
2946 | } | |
2947 | ||
271933a4 | 2948 | ret = session_destroy(session); |
54d01ffb DG |
2949 | |
2950 | return ret; | |
2951 | } | |
2952 | ||
2953 | /* | |
2954 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2955 | */ | |
2956 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2957 | { | |
2958 | int ret; | |
2959 | ||
2960 | switch (domain) { | |
2961 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2962 | { |
54d01ffb | 2963 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2964 | |
54d01ffb DG |
2965 | kcalibrate.type = calibrate->type; |
2966 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2967 | if (ret < 0) { |
54d01ffb DG |
2968 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2969 | goto error; | |
33a2b854 | 2970 | } |
54d01ffb DG |
2971 | break; |
2972 | } | |
4466912f DG |
2973 | case LTTNG_DOMAIN_UST: |
2974 | { | |
2975 | struct lttng_ust_calibrate ucalibrate; | |
2976 | ||
2977 | ucalibrate.type = calibrate->type; | |
2978 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2979 | if (ret < 0) { | |
2980 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
2981 | goto error; | |
2982 | } | |
2983 | break; | |
2984 | } | |
54d01ffb | 2985 | default: |
1ab1ea0b | 2986 | ret = LTTCOMM_UND; |
54d01ffb DG |
2987 | goto error; |
2988 | } | |
33a2b854 | 2989 | |
54d01ffb | 2990 | ret = LTTCOMM_OK; |
33a2b854 | 2991 | |
54d01ffb DG |
2992 | error: |
2993 | return ret; | |
2994 | } | |
7d29a247 | 2995 | |
54d01ffb DG |
2996 | /* |
2997 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2998 | */ | |
2999 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
3000 | char *sock_path) | |
3001 | { | |
3002 | int ret, sock; | |
b389abbe | 3003 | |
54d01ffb DG |
3004 | switch (domain) { |
3005 | case LTTNG_DOMAIN_KERNEL: | |
3006 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3007 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3008 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3009 | goto error; | |
3010 | } | |
3011 | ||
3012 | sock = lttcomm_connect_unix_sock(sock_path); | |
3013 | if (sock < 0) { | |
3014 | ret = LTTCOMM_CONNECT_FAIL; | |
3015 | goto error; | |
3016 | } | |
3017 | ||
3018 | session->kernel_session->consumer_fd = sock; | |
3019 | break; | |
3020 | default: | |
3021 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3022 | ret = LTTCOMM_UND; |
54d01ffb DG |
3023 | goto error; |
3024 | } | |
3025 | ||
3026 | ret = LTTCOMM_OK; | |
3027 | ||
3028 | error: | |
3029 | return ret; | |
3030 | } | |
3031 | ||
3032 | /* | |
3033 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3034 | */ | |
3035 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3036 | struct lttng_domain **domains) | |
3037 | { | |
b551a063 | 3038 | int ret, index = 0; |
54d01ffb DG |
3039 | ssize_t nb_dom = 0; |
3040 | ||
3041 | if (session->kernel_session != NULL) { | |
b551a063 | 3042 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3043 | nb_dom++; |
3044 | } | |
3045 | ||
b551a063 DG |
3046 | if (session->ust_session != NULL) { |
3047 | DBG3("Listing domains found UST global domain"); | |
3048 | nb_dom++; | |
3049 | } | |
54d01ffb | 3050 | |
b551a063 | 3051 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3052 | if (*domains == NULL) { |
3053 | ret = -LTTCOMM_FATAL; | |
3054 | goto error; | |
3055 | } | |
3056 | ||
b551a063 DG |
3057 | if (session->kernel_session != NULL) { |
3058 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3059 | index++; | |
3060 | } | |
3061 | ||
3062 | if (session->ust_session != NULL) { | |
3063 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3064 | index++; | |
3065 | } | |
54d01ffb | 3066 | |
54d01ffb DG |
3067 | return nb_dom; |
3068 | ||
3069 | error: | |
3070 | return ret; | |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3075 | */ | |
b551a063 | 3076 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3077 | struct lttng_channel **channels) |
3078 | { | |
3079 | int ret; | |
3080 | ssize_t nb_chan = 0; | |
3081 | ||
b551a063 DG |
3082 | switch (domain) { |
3083 | case LTTNG_DOMAIN_KERNEL: | |
3084 | if (session->kernel_session != NULL) { | |
3085 | nb_chan = session->kernel_session->channel_count; | |
3086 | } | |
0df502fd | 3087 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3088 | break; |
3089 | case LTTNG_DOMAIN_UST: | |
3090 | if (session->ust_session != NULL) { | |
bec39940 | 3091 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3092 | session->ust_session->domain_global.channels); |
3093 | } | |
0df502fd | 3094 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3095 | break; |
3096 | default: | |
3097 | *channels = NULL; | |
1ab1ea0b | 3098 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3099 | goto error; |
3100 | } | |
3101 | ||
b551a063 DG |
3102 | if (nb_chan > 0) { |
3103 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3104 | if (*channels == NULL) { | |
3105 | ret = -LTTCOMM_FATAL; | |
3106 | goto error; | |
3107 | } | |
54d01ffb | 3108 | |
b551a063 DG |
3109 | list_lttng_channels(domain, session, *channels); |
3110 | } else { | |
3111 | *channels = NULL; | |
3112 | } | |
2bdd86d4 | 3113 | |
54d01ffb DG |
3114 | return nb_chan; |
3115 | ||
3116 | error: | |
3117 | return ret; | |
3118 | } | |
3119 | ||
3120 | /* | |
3121 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3122 | */ | |
b551a063 | 3123 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3124 | char *channel_name, struct lttng_event **events) |
3125 | { | |
b551a063 | 3126 | int ret = 0; |
54d01ffb | 3127 | ssize_t nb_event = 0; |
54d01ffb | 3128 | |
b551a063 DG |
3129 | switch (domain) { |
3130 | case LTTNG_DOMAIN_KERNEL: | |
3131 | if (session->kernel_session != NULL) { | |
3132 | nb_event = list_lttng_kernel_events(channel_name, | |
3133 | session->kernel_session, events); | |
54d01ffb | 3134 | } |
b551a063 DG |
3135 | break; |
3136 | case LTTNG_DOMAIN_UST: | |
3137 | { | |
3138 | if (session->ust_session != NULL) { | |
3139 | nb_event = list_lttng_ust_global_events(channel_name, | |
3140 | &session->ust_session->domain_global, events); | |
3141 | } | |
3142 | break; | |
54d01ffb | 3143 | } |
b551a063 | 3144 | default: |
1ab1ea0b | 3145 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3146 | goto error; |
3147 | } | |
3148 | ||
b551a063 | 3149 | ret = nb_event; |
54d01ffb DG |
3150 | |
3151 | error: | |
3152 | return ret; | |
3153 | } | |
3154 | ||
3155 | /* | |
3156 | * Process the command requested by the lttng client within the command | |
3157 | * context structure. This function make sure that the return structure (llm) | |
3158 | * is set and ready for transmission before returning. | |
3159 | * | |
3160 | * Return any error encountered or 0 for success. | |
3161 | */ | |
3162 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3163 | { | |
3164 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3165 | int need_tracing_session = 1; |
f84aa40a | 3166 | int need_domain; |
54d01ffb DG |
3167 | |
3168 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3169 | ||
f84aa40a MD |
3170 | switch (cmd_ctx->lsm->cmd_type) { |
3171 | case LTTNG_CREATE_SESSION: | |
3172 | case LTTNG_DESTROY_SESSION: | |
3173 | case LTTNG_LIST_SESSIONS: | |
3174 | case LTTNG_LIST_DOMAINS: | |
3175 | case LTTNG_START_TRACE: | |
3176 | case LTTNG_STOP_TRACE: | |
3177 | need_domain = 0; | |
faf09bcf | 3178 | break; |
f84aa40a MD |
3179 | default: |
3180 | need_domain = 1; | |
3181 | } | |
3182 | ||
3183 | if (opt_no_kernel && need_domain | |
3184 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
4fba7219 DG |
3185 | ret = LTTCOMM_KERN_NA; |
3186 | goto error; | |
3187 | } | |
3188 | ||
54d01ffb DG |
3189 | /* |
3190 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3191 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3192 | * command. |
3193 | */ | |
3194 | switch(cmd_ctx->lsm->cmd_type) { | |
3195 | case LTTNG_LIST_SESSIONS: | |
3196 | case LTTNG_LIST_TRACEPOINTS: | |
3197 | case LTTNG_LIST_DOMAINS: | |
3198 | case LTTNG_LIST_CHANNELS: | |
3199 | case LTTNG_LIST_EVENTS: | |
3200 | break; | |
3201 | default: | |
3202 | /* Setup lttng message with no payload */ | |
3203 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3204 | if (ret < 0) { | |
3205 | /* This label does not try to unlock the session */ | |
3206 | goto init_setup_error; | |
3207 | } | |
3208 | } | |
3209 | ||
3210 | /* Commands that DO NOT need a session. */ | |
3211 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3212 | case LTTNG_CREATE_SESSION: |
f84aa40a | 3213 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3214 | case LTTNG_LIST_SESSIONS: |
3215 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3216 | need_tracing_session = 0; |
54d01ffb DG |
3217 | break; |
3218 | default: | |
3219 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3220 | session_lock_list(); |
54d01ffb | 3221 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3222 | session_unlock_list(); |
54d01ffb DG |
3223 | if (cmd_ctx->session == NULL) { |
3224 | if (cmd_ctx->lsm->session.name != NULL) { | |
3225 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3226 | } else { | |
3227 | /* If no session name specified */ | |
3228 | ret = LTTCOMM_SELECT_SESS; | |
3229 | } | |
3230 | goto error; | |
3231 | } else { | |
3232 | /* Acquire lock for the session */ | |
3233 | session_lock(cmd_ctx->session); | |
3234 | } | |
3235 | break; | |
3236 | } | |
b389abbe | 3237 | |
f84aa40a MD |
3238 | if (!need_domain) { |
3239 | goto skip_domain; | |
3240 | } | |
54d01ffb DG |
3241 | /* |
3242 | * Check domain type for specific "pre-action". | |
3243 | */ | |
3244 | switch (cmd_ctx->lsm->domain.type) { | |
3245 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 DG |
3246 | if (!is_root) { |
3247 | ret = LTTCOMM_KERN_NA; | |
3248 | goto error; | |
3249 | } | |
3250 | ||
54d01ffb DG |
3251 | /* Kernel tracer check */ |
3252 | if (kernel_tracer_fd == 0) { | |
3253 | /* Basically, load kernel tracer modules */ | |
096102bd DG |
3254 | ret = init_kernel_tracer(); |
3255 | if (ret != 0) { | |
54d01ffb DG |
3256 | goto error; |
3257 | } | |
3258 | } | |
5eb91c98 | 3259 | |
54d01ffb | 3260 | /* Need a session for kernel command */ |
44d3bd01 | 3261 | if (need_tracing_session) { |
54d01ffb | 3262 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3263 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3264 | if (ret < 0) { |
54d01ffb | 3265 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3266 | goto error; |
3267 | } | |
b389abbe | 3268 | } |
7d29a247 | 3269 | |
54d01ffb | 3270 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3271 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3272 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3273 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3274 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3275 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3276 | if (ret < 0) { |
54d01ffb DG |
3277 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3278 | goto error; | |
950131af | 3279 | } |
3ff2ecac MD |
3280 | } else { |
3281 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3282 | } |
0d0c377a | 3283 | } |
54d01ffb | 3284 | break; |
2bdd86d4 | 3285 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3286 | { |
44d3bd01 | 3287 | if (need_tracing_session) { |
f6a9efaa | 3288 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3289 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3290 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3291 | if (ret != LTTCOMM_OK) { |
3292 | goto error; | |
3293 | } | |
3294 | } | |
7753dea8 MD |
3295 | /* Start the UST consumer daemons */ |
3296 | /* 64-bit */ | |
3297 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3298 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3299 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3300 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3301 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3302 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3303 | if (ret < 0) { |
7753dea8 MD |
3304 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3305 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3306 | goto error; |
3307 | } | |
48842b30 | 3308 | |
7753dea8 | 3309 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3310 | } else { |
7753dea8 MD |
3311 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3312 | } | |
3313 | /* 32-bit */ | |
fc7a59ce | 3314 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3315 | ustconsumer32_data.pid == 0 && |
3316 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3317 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3318 | ret = start_consumerd(&ustconsumer32_data); | |
3319 | if (ret < 0) { | |
3320 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3321 | ust_consumerd32_fd = -EINVAL; | |
3322 | goto error; | |
3323 | } | |
3324 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3325 | } else { | |
3326 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3327 | } |
44d3bd01 DG |
3328 | } |
3329 | break; | |
48842b30 | 3330 | } |
54d01ffb | 3331 | default: |
54d01ffb DG |
3332 | break; |
3333 | } | |
f84aa40a | 3334 | skip_domain: |
33a2b854 | 3335 | |
8e0af1b4 MD |
3336 | /* |
3337 | * Check that the UID or GID match that of the tracing session. | |
3338 | * The root user can interact with all sessions. | |
3339 | */ | |
3340 | if (need_tracing_session) { | |
3341 | if (!session_access_ok(cmd_ctx->session, | |
ca4537d3 | 3342 | cmd_ctx->creds.uid, cmd_ctx->creds.gid)) { |
8e0af1b4 MD |
3343 | ret = LTTCOMM_EPERM; |
3344 | goto error; | |
3345 | } | |
3346 | } | |
3347 | ||
54d01ffb DG |
3348 | /* Process by command type */ |
3349 | switch (cmd_ctx->lsm->cmd_type) { | |
3350 | case LTTNG_ADD_CONTEXT: | |
3351 | { | |
3352 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3353 | cmd_ctx->lsm->u.context.channel_name, | |
3354 | cmd_ctx->lsm->u.context.event_name, | |
3355 | &cmd_ctx->lsm->u.context.ctx); | |
3356 | break; | |
3357 | } | |
3358 | case LTTNG_DISABLE_CHANNEL: | |
3359 | { | |
3360 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3361 | cmd_ctx->lsm->u.disable.channel_name); | |
3362 | break; | |
3363 | } | |
3364 | case LTTNG_DISABLE_EVENT: | |
3365 | { | |
3366 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3367 | cmd_ctx->lsm->u.disable.channel_name, | |
3368 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3369 | break; |
3370 | } | |
54d01ffb DG |
3371 | case LTTNG_DISABLE_ALL_EVENT: |
3372 | { | |
2bdd86d4 | 3373 | DBG("Disabling all events"); |
54d01ffb DG |
3374 | |
3375 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3376 | cmd_ctx->lsm->u.disable.channel_name); | |
3377 | break; | |
3378 | } | |
3379 | case LTTNG_ENABLE_CHANNEL: | |
3380 | { | |
aea829b3 | 3381 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3382 | &cmd_ctx->lsm->u.channel.chan); |
3383 | break; | |
3384 | } | |
3385 | case LTTNG_ENABLE_EVENT: | |
3386 | { | |
3387 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3388 | cmd_ctx->lsm->u.enable.channel_name, | |
3389 | &cmd_ctx->lsm->u.enable.event); | |
3390 | break; | |
3391 | } | |
3392 | case LTTNG_ENABLE_ALL_EVENT: | |
3393 | { | |
2bdd86d4 | 3394 | DBG("Enabling all events"); |
54d01ffb DG |
3395 | |
3396 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3397 | cmd_ctx->lsm->u.enable.channel_name, |
3398 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3399 | break; |
3400 | } | |
052da939 | 3401 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3402 | { |
9f19cc17 | 3403 | struct lttng_event *events; |
54d01ffb | 3404 | ssize_t nb_events; |
052da939 | 3405 | |
54d01ffb DG |
3406 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3407 | if (nb_events < 0) { | |
3408 | ret = -nb_events; | |
3409 | goto error; | |
2ef84c95 DG |
3410 | } |
3411 | ||
3412 | /* | |
3413 | * Setup lttng message with payload size set to the event list size in | |
3414 | * bytes and then copy list into the llm payload. | |
3415 | */ | |
052da939 | 3416 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3417 | if (ret < 0) { |
052da939 | 3418 | free(events); |
2ef84c95 DG |
3419 | goto setup_error; |
3420 | } | |
3421 | ||
3422 | /* Copy event list into message payload */ | |
9f19cc17 | 3423 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3424 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3425 | |
9f19cc17 | 3426 | free(events); |
2ef84c95 DG |
3427 | |
3428 | ret = LTTCOMM_OK; | |
3429 | break; | |
3430 | } | |
f3ed775e | 3431 | case LTTNG_START_TRACE: |
8c0faa1d | 3432 | { |
54d01ffb | 3433 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3434 | break; |
3435 | } | |
f3ed775e | 3436 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3437 | { |
54d01ffb | 3438 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3439 | break; |
3440 | } | |
5e16da05 MD |
3441 | case LTTNG_CREATE_SESSION: |
3442 | { | |
54d01ffb | 3443 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3444 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3445 | break; |
3446 | } | |
3447 | case LTTNG_DESTROY_SESSION: | |
3448 | { | |
54d01ffb DG |
3449 | ret = cmd_destroy_session(cmd_ctx->session, |
3450 | cmd_ctx->lsm->session.name); | |
5461b305 | 3451 | break; |
5e16da05 | 3452 | } |
9f19cc17 | 3453 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3454 | { |
54d01ffb DG |
3455 | ssize_t nb_dom; |
3456 | struct lttng_domain *domains; | |
5461b305 | 3457 | |
54d01ffb DG |
3458 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3459 | if (nb_dom < 0) { | |
3460 | ret = -nb_dom; | |
3461 | goto error; | |
ce3d728c | 3462 | } |
520ff687 | 3463 | |
54d01ffb | 3464 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3465 | if (ret < 0) { |
3466 | goto setup_error; | |
520ff687 | 3467 | } |
57167058 | 3468 | |
54d01ffb DG |
3469 | /* Copy event list into message payload */ |
3470 | memcpy(cmd_ctx->llm->payload, domains, | |
3471 | nb_dom * sizeof(struct lttng_domain)); | |
3472 | ||
3473 | free(domains); | |
5e16da05 | 3474 | |
5461b305 | 3475 | ret = LTTCOMM_OK; |
5e16da05 MD |
3476 | break; |
3477 | } | |
9f19cc17 | 3478 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3479 | { |
54d01ffb DG |
3480 | size_t nb_chan; |
3481 | struct lttng_channel *channels; | |
3482 | ||
b551a063 DG |
3483 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3484 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3485 | if (nb_chan < 0) { |
3486 | ret = -nb_chan; | |
3487 | goto error; | |
5461b305 | 3488 | } |
ca95a216 | 3489 | |
54d01ffb | 3490 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3491 | if (ret < 0) { |
3492 | goto setup_error; | |
3493 | } | |
9f19cc17 | 3494 | |
54d01ffb DG |
3495 | /* Copy event list into message payload */ |
3496 | memcpy(cmd_ctx->llm->payload, channels, | |
3497 | nb_chan * sizeof(struct lttng_channel)); | |
3498 | ||
3499 | free(channels); | |
9f19cc17 DG |
3500 | |
3501 | ret = LTTCOMM_OK; | |
5461b305 | 3502 | break; |
5e16da05 | 3503 | } |
9f19cc17 | 3504 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3505 | { |
b551a063 | 3506 | ssize_t nb_event; |
684d34d2 | 3507 | struct lttng_event *events = NULL; |
9f19cc17 | 3508 | |
b551a063 | 3509 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3510 | cmd_ctx->lsm->u.list.channel_name, &events); |
3511 | if (nb_event < 0) { | |
3512 | ret = -nb_event; | |
3513 | goto error; | |
5461b305 | 3514 | } |
ca95a216 | 3515 | |
54d01ffb | 3516 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3517 | if (ret < 0) { |
3518 | goto setup_error; | |
3519 | } | |
9f19cc17 | 3520 | |
54d01ffb DG |
3521 | /* Copy event list into message payload */ |
3522 | memcpy(cmd_ctx->llm->payload, events, | |
3523 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3524 | |
54d01ffb | 3525 | free(events); |
9f19cc17 DG |
3526 | |
3527 | ret = LTTCOMM_OK; | |
5461b305 | 3528 | break; |
5e16da05 MD |
3529 | } |
3530 | case LTTNG_LIST_SESSIONS: | |
3531 | { | |
8e0af1b4 | 3532 | unsigned int nr_sessions; |
5461b305 | 3533 | |
8e0af1b4 | 3534 | session_lock_list(); |
ca4537d3 | 3535 | nr_sessions = lttng_sessions_count(cmd_ctx->creds.uid, cmd_ctx->creds.gid); |
d32fb093 | 3536 | |
8e0af1b4 | 3537 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3538 | if (ret < 0) { |
54d01ffb | 3539 | session_unlock_list(); |
5461b305 | 3540 | goto setup_error; |
e065084a | 3541 | } |
5e16da05 | 3542 | |
6c9cc2ab | 3543 | /* Filled the session array */ |
8e0af1b4 | 3544 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
ca4537d3 | 3545 | cmd_ctx->creds.uid, cmd_ctx->creds.gid); |
6c9cc2ab | 3546 | |
54d01ffb | 3547 | session_unlock_list(); |
5e16da05 | 3548 | |
5461b305 | 3549 | ret = LTTCOMM_OK; |
5e16da05 MD |
3550 | break; |
3551 | } | |
d0254c7c MD |
3552 | case LTTNG_CALIBRATE: |
3553 | { | |
54d01ffb DG |
3554 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3555 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3556 | break; |
3557 | } | |
d9800920 DG |
3558 | case LTTNG_REGISTER_CONSUMER: |
3559 | { | |
54d01ffb DG |
3560 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3561 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3562 | break; |
3563 | } | |
5e16da05 | 3564 | default: |
5e16da05 | 3565 | ret = LTTCOMM_UND; |
5461b305 | 3566 | break; |
fac6795d DG |
3567 | } |
3568 | ||
5461b305 | 3569 | error: |
5461b305 DG |
3570 | if (cmd_ctx->llm == NULL) { |
3571 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3572 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3573 | goto setup_error; |
3574 | } | |
3575 | } | |
54d01ffb | 3576 | /* Set return code */ |
5461b305 | 3577 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3578 | setup_error: |
b5541356 | 3579 | if (cmd_ctx->session) { |
54d01ffb | 3580 | session_unlock(cmd_ctx->session); |
b5541356 | 3581 | } |
54d01ffb | 3582 | init_setup_error: |
8028d920 | 3583 | return ret; |
fac6795d DG |
3584 | } |
3585 | ||
1d4b027a | 3586 | /* |
d063d709 DG |
3587 | * This thread manage all clients request using the unix client socket for |
3588 | * communication. | |
1d4b027a DG |
3589 | */ |
3590 | static void *thread_manage_clients(void *data) | |
3591 | { | |
5eb91c98 DG |
3592 | int sock = 0, ret, i, pollfd; |
3593 | uint32_t revents, nb_fd; | |
273ea72c | 3594 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3595 | struct lttng_poll_event events; |
1d4b027a DG |
3596 | |
3597 | DBG("[thread] Manage client started"); | |
3598 | ||
f6a9efaa DG |
3599 | rcu_register_thread(); |
3600 | ||
1d4b027a DG |
3601 | ret = lttcomm_listen_unix_sock(client_sock); |
3602 | if (ret < 0) { | |
3603 | goto error; | |
3604 | } | |
3605 | ||
5eb91c98 DG |
3606 | /* |
3607 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3608 | * more will be added to this poll set. | |
3609 | */ | |
3610 | ret = create_thread_poll_set(&events, 2); | |
3611 | if (ret < 0) { | |
3612 | goto error; | |
3613 | } | |
273ea72c | 3614 | |
5eb91c98 DG |
3615 | /* Add the application registration socket */ |
3616 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3617 | if (ret < 0) { | |
3618 | goto error; | |
3619 | } | |
273ea72c | 3620 | |
bbd973c2 DG |
3621 | /* |
3622 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3623 | */ |
3624 | if (opt_sig_parent) { | |
8db8d1dc | 3625 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3626 | } |
3627 | ||
3628 | while (1) { | |
1d4b027a | 3629 | DBG("Accepting client command ..."); |
273ea72c | 3630 | |
5eb91c98 DG |
3631 | nb_fd = LTTNG_POLL_GETNB(&events); |
3632 | ||
273ea72c | 3633 | /* Inifinite blocking call, waiting for transmission */ |
a8b0b341 | 3634 | restart: |
5eb91c98 | 3635 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3636 | if (ret < 0) { |
a8b0b341 MD |
3637 | /* |
3638 | * Restart interrupted system call. | |
3639 | */ | |
3640 | if (errno == EINTR) { | |
3641 | goto restart; | |
3642 | } | |
273ea72c DG |
3643 | goto error; |
3644 | } | |
3645 | ||
5eb91c98 DG |
3646 | for (i = 0; i < nb_fd; i++) { |
3647 | /* Fetch once the poll data */ | |
3648 | revents = LTTNG_POLL_GETEV(&events, i); | |
3649 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3650 | ||
3651 | /* Thread quit pipe has been closed. Killing thread. */ | |
3652 | ret = check_thread_quit_pipe(pollfd, revents); | |
3653 | if (ret) { | |
3654 | goto error; | |
3655 | } | |
3656 | ||
3657 | /* Event on the registration socket */ | |
3658 | if (pollfd == client_sock) { | |
3659 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3660 | ERR("Client socket poll error"); | |
3661 | goto error; | |
3662 | } | |
3663 | } | |
3664 | } | |
3665 | ||
3666 | DBG("Wait for client response"); | |
3667 | ||
3668 | sock = lttcomm_accept_unix_sock(client_sock); | |
3669 | if (sock < 0) { | |
273ea72c | 3670 | goto error; |
273ea72c DG |
3671 | } |
3672 | ||
be040666 DG |
3673 | /* Set socket option for credentials retrieval */ |
3674 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3675 | if (ret < 0) { | |
3676 | goto error; | |
3677 | } | |
3678 | ||
5eb91c98 | 3679 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3680 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3681 | if (cmd_ctx == NULL) { |
ba7f0ae5 | 3682 | perror("zmalloc cmd_ctx"); |
1d4b027a | 3683 | goto error; |
5eb91c98 | 3684 | } |
1d4b027a | 3685 | |
5eb91c98 | 3686 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3687 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3688 | if (cmd_ctx->lsm == NULL) { |
ba7f0ae5 | 3689 | perror("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3690 | goto error; |
3691 | } | |
1d4b027a | 3692 | |
5eb91c98 DG |
3693 | cmd_ctx->llm = NULL; |
3694 | cmd_ctx->session = NULL; | |
1d4b027a | 3695 | |
5eb91c98 DG |
3696 | /* |
3697 | * Data is received from the lttng client. The struct | |
3698 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3699 | * the client. | |
3700 | */ | |
3701 | DBG("Receiving data from client ..."); | |
be040666 DG |
3702 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3703 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3704 | if (ret <= 0) { |
3705 | DBG("Nothing recv() from client... continuing"); | |
3706 | close(sock); | |
3707 | free(cmd_ctx); | |
3708 | continue; | |
3709 | } | |
1d4b027a | 3710 | |
5eb91c98 DG |
3711 | // TODO: Validate cmd_ctx including sanity check for |
3712 | // security purpose. | |
f7776ea7 | 3713 | |
f6a9efaa | 3714 | rcu_thread_online(); |
5eb91c98 DG |
3715 | /* |
3716 | * This function dispatch the work to the kernel or userspace tracer | |
3717 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3718 | * informations for the client. The command context struct contains | |
3719 | * everything this function may needs. | |
3720 | */ | |
3721 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3722 | rcu_thread_offline(); |
5eb91c98 | 3723 | if (ret < 0) { |
bbd973c2 | 3724 | /* |
5eb91c98 | 3725 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3726 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3727 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3728 | */ |
bbd973c2 | 3729 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3730 | continue; |
3731 | } | |
d6e4fca4 | 3732 | |
54d01ffb DG |
3733 | DBG("Sending response (size: %d, retcode: %s)", |
3734 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3735 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3736 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3737 | if (ret < 0) { |
3738 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3739 | } |
1d4b027a | 3740 | |
5eb91c98 | 3741 | /* End of transmission */ |
273ea72c | 3742 | close(sock); |
be040666 DG |
3743 | |
3744 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3745 | } |
3746 | ||
5eb91c98 DG |
3747 | error: |
3748 | DBG("Client thread dying"); | |
273ea72c | 3749 | unlink(client_unix_sock_path); |
5eb91c98 DG |
3750 | close(client_sock); |
3751 | close(sock); | |
273ea72c | 3752 | |
5eb91c98 | 3753 | lttng_poll_clean(&events); |
a2fb29a5 | 3754 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3755 | |
3756 | rcu_unregister_thread(); | |
1d4b027a DG |
3757 | return NULL; |
3758 | } | |
3759 | ||
3760 | ||
fac6795d DG |
3761 | /* |
3762 | * usage function on stderr | |
3763 | */ | |
3764 | static void usage(void) | |
3765 | { | |
b716ce68 | 3766 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3767 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3768 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3769 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3770 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3771 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3772 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3773 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3774 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3775 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3776 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3777 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3778 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3779 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3780 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3781 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3782 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3783 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3784 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3785 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3786 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3787 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3788 | } |
3789 | ||
3790 | /* | |
3791 | * daemon argument parsing | |
3792 | */ | |
3793 | static int parse_args(int argc, char **argv) | |
3794 | { | |
3795 | int c; | |
3796 | ||
3797 | static struct option long_options[] = { | |
3798 | { "client-sock", 1, 0, 'c' }, | |
3799 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3800 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3801 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3802 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3803 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3804 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3805 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3806 | { "consumerd32-path", 1, 0, 'u' }, | |
3807 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3808 | { "consumerd64-path", 1, 0, 't' }, | |
3809 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3810 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3811 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3812 | { "help", 0, 0, 'h' }, |
3813 | { "group", 1, 0, 'g' }, | |
3814 | { "version", 0, 0, 'V' }, | |
75462a81 | 3815 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3816 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3817 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3818 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3819 | { NULL, 0, 0, 0 } |
3820 | }; | |
3821 | ||
3822 | while (1) { | |
3823 | int option_index = 0; | |
4fba7219 | 3824 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3825 | long_options, &option_index); |
fac6795d DG |
3826 | if (c == -1) { |
3827 | break; | |
3828 | } | |
3829 | ||
3830 | switch (c) { | |
3831 | case 0: | |
3832 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3833 | if (optarg) { | |
3834 | fprintf(stderr, " with arg %s\n", optarg); | |
3835 | } | |
3836 | break; | |
b716ce68 | 3837 | case 'c': |
fac6795d DG |
3838 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3839 | break; | |
3840 | case 'a': | |
3841 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3842 | break; | |
3843 | case 'd': | |
3844 | opt_daemon = 1; | |
3845 | break; | |
3846 | case 'g': | |
fb09408a | 3847 | opt_tracing_group = optarg; |
fac6795d DG |
3848 | break; |
3849 | case 'h': | |
3850 | usage(); | |
3851 | exit(EXIT_FAILURE); | |
3852 | case 'V': | |
3853 | fprintf(stdout, "%s\n", VERSION); | |
3854 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3855 | case 'S': |
3856 | opt_sig_parent = 1; | |
3857 | break; | |
d6f42150 | 3858 | case 'E': |
3bd1e081 | 3859 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3860 | break; |
3861 | case 'C': | |
3bd1e081 MD |
3862 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3863 | break; | |
3864 | case 'F': | |
7753dea8 | 3865 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3866 | break; |
3867 | case 'D': | |
7753dea8 MD |
3868 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3869 | break; | |
3870 | case 'H': | |
3871 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3872 | break; | |
3873 | case 'G': | |
3874 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3875 | break; |
4fba7219 DG |
3876 | case 'N': |
3877 | opt_no_kernel = 1; | |
3878 | break; | |
75462a81 DG |
3879 | case 'q': |
3880 | opt_quiet = 1; | |
3881 | break; | |
3f9947db | 3882 | case 'v': |
53086306 DG |
3883 | /* Verbose level can increase using multiple -v */ |
3884 | opt_verbose += 1; | |
3f9947db | 3885 | break; |
31f73cc9 | 3886 | case 'Z': |
3bd1e081 | 3887 | opt_verbose_consumer += 1; |
31f73cc9 | 3888 | break; |
fb09408a | 3889 | case 'u': |
fc7a59ce | 3890 | consumerd32_bin= optarg; |
ebaeda94 MD |
3891 | break; |
3892 | case 'U': | |
3893 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3894 | break; |
3895 | case 't': | |
fc7a59ce | 3896 | consumerd64_bin = optarg; |
ebaeda94 MD |
3897 | break; |
3898 | case 'T': | |
3899 | consumerd64_libdir = optarg; | |
fb09408a | 3900 | break; |
fac6795d DG |
3901 | default: |
3902 | /* Unknown option or other error. | |
3903 | * Error is printed by getopt, just return */ | |
3904 | return -1; | |
3905 | } | |
3906 | } | |
3907 | ||
3908 | return 0; | |
3909 | } | |
3910 | ||
3911 | /* | |
d063d709 | 3912 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3913 | * apps_sock - The communication socket for all UST apps. |
3914 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3915 | */ |
cf3af59e | 3916 | static int init_daemon_socket(void) |
fac6795d DG |
3917 | { |
3918 | int ret = 0; | |
3919 | mode_t old_umask; | |
3920 | ||
3921 | old_umask = umask(0); | |
3922 | ||
3923 | /* Create client tool unix socket */ | |
d6f42150 DG |
3924 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3925 | if (client_sock < 0) { | |
3926 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3927 | ret = -1; |
3928 | goto end; | |
3929 | } | |
3930 | ||
3931 | /* File permission MUST be 660 */ | |
3932 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3933 | if (ret < 0) { | |
d6f42150 | 3934 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
3935 | perror("chmod"); |
3936 | goto end; | |
3937 | } | |
3938 | ||
3939 | /* Create the application unix socket */ | |
d6f42150 DG |
3940 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3941 | if (apps_sock < 0) { | |
3942 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3943 | ret = -1; |
3944 | goto end; | |
3945 | } | |
3946 | ||
d6f42150 | 3947 | /* File permission MUST be 666 */ |
54d01ffb DG |
3948 | ret = chmod(apps_unix_sock_path, |
3949 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3950 | if (ret < 0) { |
d6f42150 | 3951 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
3952 | perror("chmod"); |
3953 | goto end; | |
3954 | } | |
3955 | ||
3956 | end: | |
3957 | umask(old_umask); | |
3958 | return ret; | |
3959 | } | |
3960 | ||
3961 | /* | |
54d01ffb DG |
3962 | * Check if the global socket is available, and if a daemon is answering at the |
3963 | * other side. If yes, error is returned. | |
fac6795d | 3964 | */ |
cf3af59e | 3965 | static int check_existing_daemon(void) |
fac6795d | 3966 | { |
7d8234d9 | 3967 | /* Is there anybody out there ? */ |
099e26bd | 3968 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3969 | return -EEXIST; |
099e26bd | 3970 | } |
b09c7c76 DG |
3971 | |
3972 | return 0; | |
fac6795d DG |
3973 | } |
3974 | ||
fac6795d | 3975 | /* |
d063d709 | 3976 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3977 | * |
d063d709 | 3978 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3979 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3980 | */ |
be040666 | 3981 | static int set_permissions(char *rundir) |
fac6795d DG |
3982 | { |
3983 | int ret; | |
996b65c8 | 3984 | gid_t gid; |
fac6795d | 3985 | |
996b65c8 MD |
3986 | gid = allowed_group(); |
3987 | if (gid < 0) { | |
be040666 DG |
3988 | WARN("No tracing group detected"); |
3989 | ret = 0; | |
fac6795d DG |
3990 | goto end; |
3991 | } | |
3992 | ||
d6f42150 | 3993 | /* Set lttng run dir */ |
be040666 | 3994 | ret = chown(rundir, 0, gid); |
d6f42150 | 3995 | if (ret < 0) { |
be040666 | 3996 | ERR("Unable to set group on %s", rundir); |
d6f42150 DG |
3997 | perror("chown"); |
3998 | } | |
3999 | ||
d1613cf5 | 4000 | /* Ensure tracing group can search the run dir */ |
61076f74 | 4001 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
4002 | if (ret < 0) { |
4003 | ERR("Unable to set permissions on %s", rundir); | |
4004 | perror("chmod"); | |
4005 | } | |
4006 | ||
d6f42150 | 4007 | /* lttng client socket path */ |
996b65c8 | 4008 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4009 | if (ret < 0) { |
d6f42150 DG |
4010 | ERR("Unable to set group on %s", client_unix_sock_path); |
4011 | perror("chown"); | |
4012 | } | |
4013 | ||
3bd1e081 MD |
4014 | /* kconsumer error socket path */ |
4015 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4016 | if (ret < 0) { |
3bd1e081 MD |
4017 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
4018 | perror("chown"); | |
4019 | } | |
4020 | ||
7753dea8 MD |
4021 | /* 64-bit ustconsumer error socket path */ |
4022 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4023 | if (ret < 0) { | |
4024 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
4025 | perror("chown"); | |
4026 | } | |
4027 | ||
4028 | /* 32-bit ustconsumer compat32 error socket path */ | |
4029 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4030 | if (ret < 0) { |
7753dea8 | 4031 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
fac6795d DG |
4032 | perror("chown"); |
4033 | } | |
4034 | ||
d6f42150 | 4035 | DBG("All permissions are set"); |
e07ae692 | 4036 | |
fac6795d DG |
4037 | end: |
4038 | return ret; | |
4039 | } | |
4040 | ||
7a485870 | 4041 | /* |
d063d709 | 4042 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
4043 | */ |
4044 | static int create_kernel_poll_pipe(void) | |
4045 | { | |
ca4537d3 | 4046 | return pipe2(kernel_poll_pipe, O_CLOEXEC); |
7a485870 DG |
4047 | } |
4048 | ||
099e26bd DG |
4049 | /* |
4050 | * Create the application command pipe to wake thread_manage_apps. | |
4051 | */ | |
4052 | static int create_apps_cmd_pipe(void) | |
4053 | { | |
ca4537d3 | 4054 | return pipe2(apps_cmd_pipe, O_CLOEXEC); |
099e26bd DG |
4055 | } |
4056 | ||
d6f42150 | 4057 | /* |
d063d709 | 4058 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4059 | */ |
67e40797 | 4060 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4061 | { |
4062 | int ret; | |
4063 | ||
67e40797 DG |
4064 | DBG3("Creating LTTng run directory: %s", rundir); |
4065 | ||
d1613cf5 | 4066 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4067 | if (ret < 0) { |
b1f11e69 | 4068 | if (errno != EEXIST) { |
67e40797 | 4069 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4070 | goto error; |
4071 | } else { | |
4072 | ret = 0; | |
4073 | } | |
d6f42150 DG |
4074 | } |
4075 | ||
4076 | error: | |
4077 | return ret; | |
4078 | } | |
4079 | ||
4080 | /* | |
d063d709 DG |
4081 | * Setup sockets and directory needed by the kconsumerd communication with the |
4082 | * session daemon. | |
d6f42150 | 4083 | */ |
67e40797 DG |
4084 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4085 | const char *rundir) | |
d6f42150 DG |
4086 | { |
4087 | int ret; | |
67e40797 | 4088 | char path[PATH_MAX]; |
d6f42150 | 4089 | |
67e40797 | 4090 | switch (consumer_data->type) { |
7753dea8 | 4091 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4092 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4093 | break; |
4094 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4095 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4096 | break; |
4097 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4098 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4099 | break; |
4100 | default: | |
4101 | ERR("Consumer type unknown"); | |
4102 | ret = -EINVAL; | |
4103 | goto error; | |
d6f42150 DG |
4104 | } |
4105 | ||
67e40797 DG |
4106 | DBG2("Creating consumer directory: %s", path); |
4107 | ||
d1613cf5 | 4108 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4109 | if (ret < 0) { |
6beb2242 | 4110 | if (errno != EEXIST) { |
3bd1e081 | 4111 | ERR("Failed to create %s", path); |
6beb2242 DG |
4112 | goto error; |
4113 | } | |
4114 | ret = 0; | |
d6f42150 DG |
4115 | } |
4116 | ||
4117 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4118 | consumer_data->err_sock = |
4119 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4120 | if (consumer_data->err_sock < 0) { | |
4121 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4122 | ret = -1; |
4123 | goto error; | |
4124 | } | |
4125 | ||
4126 | /* File permission MUST be 660 */ | |
3bd1e081 | 4127 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4128 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4129 | if (ret < 0) { |
3bd1e081 | 4130 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4131 | PERROR("chmod"); |
d6f42150 DG |
4132 | goto error; |
4133 | } | |
4134 | ||
4135 | error: | |
4136 | return ret; | |
4137 | } | |
4138 | ||
fac6795d | 4139 | /* |
d063d709 | 4140 | * Signal handler for the daemon |
cf3af59e | 4141 | * |
54d01ffb DG |
4142 | * Simply stop all worker threads, leaving main() return gracefully after |
4143 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4144 | */ |
4145 | static void sighandler(int sig) | |
4146 | { | |
4147 | switch (sig) { | |
cf3af59e | 4148 | case SIGPIPE: |
af87c45a | 4149 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4150 | return; |
4151 | case SIGINT: | |
af87c45a | 4152 | DBG("SIGINT caught"); |
cf3af59e MD |
4153 | stop_threads(); |
4154 | break; | |
4155 | case SIGTERM: | |
af87c45a | 4156 | DBG("SIGTERM caught"); |
cf3af59e MD |
4157 | stop_threads(); |
4158 | break; | |
4159 | default: | |
4160 | break; | |
fac6795d | 4161 | } |
fac6795d DG |
4162 | } |
4163 | ||
4164 | /* | |
d063d709 | 4165 | * Setup signal handler for : |
1d4b027a | 4166 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4167 | */ |
1d4b027a | 4168 | static int set_signal_handler(void) |
fac6795d | 4169 | { |
1d4b027a DG |
4170 | int ret = 0; |
4171 | struct sigaction sa; | |
4172 | sigset_t sigset; | |
fac6795d | 4173 | |
1d4b027a DG |
4174 | if ((ret = sigemptyset(&sigset)) < 0) { |
4175 | perror("sigemptyset"); | |
4176 | return ret; | |
4177 | } | |
d6f42150 | 4178 | |
1d4b027a DG |
4179 | sa.sa_handler = sighandler; |
4180 | sa.sa_mask = sigset; | |
4181 | sa.sa_flags = 0; | |
4182 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
4183 | perror("sigaction"); | |
4184 | return ret; | |
d6f42150 DG |
4185 | } |
4186 | ||
1d4b027a DG |
4187 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
4188 | perror("sigaction"); | |
4189 | return ret; | |
d6f42150 | 4190 | } |
aaf26714 | 4191 | |
1d4b027a DG |
4192 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
4193 | perror("sigaction"); | |
4194 | return ret; | |
8c0faa1d DG |
4195 | } |
4196 | ||
1d4b027a DG |
4197 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4198 | ||
4199 | return ret; | |
fac6795d DG |
4200 | } |
4201 | ||
f3ed775e | 4202 | /* |
d063d709 DG |
4203 | * Set open files limit to unlimited. This daemon can open a large number of |
4204 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4205 | */ |
4206 | static void set_ulimit(void) | |
4207 | { | |
4208 | int ret; | |
4209 | struct rlimit lim; | |
4210 | ||
a88df331 | 4211 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4212 | lim.rlim_cur = 65535; |
4213 | lim.rlim_max = 65535; | |
4214 | ||
4215 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4216 | if (ret < 0) { | |
4217 | perror("failed to set open files limit"); | |
4218 | } | |
4219 | } | |
4220 | ||
fac6795d DG |
4221 | /* |
4222 | * main | |
4223 | */ | |
4224 | int main(int argc, char **argv) | |
4225 | { | |
fac6795d DG |
4226 | int ret = 0; |
4227 | void *status; | |
b082db07 | 4228 | const char *home_path; |
fac6795d | 4229 | |
335a95b7 MD |
4230 | init_kernel_workarounds(); |
4231 | ||
f6a9efaa DG |
4232 | rcu_register_thread(); |
4233 | ||
273ea72c | 4234 | /* Create thread quit pipe */ |
cf3af59e MD |
4235 | if ((ret = init_thread_quit_pipe()) < 0) { |
4236 | goto error; | |
273ea72c DG |
4237 | } |
4238 | ||
7753dea8 | 4239 | setup_consumerd_path(); |
fb09408a | 4240 | |
fac6795d DG |
4241 | /* Parse arguments */ |
4242 | progname = argv[0]; | |
4243 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4244 | goto error; |
fac6795d DG |
4245 | } |
4246 | ||
4247 | /* Daemonize */ | |
4248 | if (opt_daemon) { | |
53094c05 DG |
4249 | ret = daemon(0, 0); |
4250 | if (ret < 0) { | |
4251 | perror("daemon"); | |
cf3af59e | 4252 | goto error; |
53094c05 | 4253 | } |
fac6795d DG |
4254 | } |
4255 | ||
4256 | /* Check if daemon is UID = 0 */ | |
4257 | is_root = !getuid(); | |
4258 | ||
fac6795d | 4259 | if (is_root) { |
990570ed | 4260 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4261 | |
4262 | /* Create global run dir with root access */ | |
4263 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4264 | if (ret < 0) { |
cf3af59e | 4265 | goto error; |
d6f42150 DG |
4266 | } |
4267 | ||
fac6795d | 4268 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4269 | snprintf(apps_unix_sock_path, PATH_MAX, |
4270 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4271 | } |
4272 | ||
4273 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4274 | snprintf(client_unix_sock_path, PATH_MAX, |
4275 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4276 | } | |
0fdd1e2c DG |
4277 | |
4278 | /* Set global SHM for ust */ | |
4279 | if (strlen(wait_shm_path) == 0) { | |
4280 | snprintf(wait_shm_path, PATH_MAX, | |
4281 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4282 | } | |
67e40797 DG |
4283 | |
4284 | /* Setup kernel consumerd path */ | |
4285 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4286 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4287 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4288 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4289 | |
4290 | DBG2("Kernel consumer err path: %s", | |
4291 | kconsumer_data.err_unix_sock_path); | |
4292 | DBG2("Kernel consumer cmd path: %s", | |
4293 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4294 | } else { |
b082db07 DG |
4295 | home_path = get_home_dir(); |
4296 | if (home_path == NULL) { | |
273ea72c DG |
4297 | /* TODO: Add --socket PATH option */ |
4298 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4299 | ret = -EPERM; |
4300 | goto error; | |
b082db07 DG |
4301 | } |
4302 | ||
67e40797 DG |
4303 | /* |
4304 | * Create rundir from home path. This will create something like | |
4305 | * $HOME/.lttng | |
4306 | */ | |
990570ed | 4307 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4308 | if (ret < 0) { |
4309 | ret = -ENOMEM; | |
4310 | goto error; | |
4311 | } | |
4312 | ||
4313 | ret = create_lttng_rundir(rundir); | |
4314 | if (ret < 0) { | |
4315 | goto error; | |
4316 | } | |
4317 | ||
fac6795d | 4318 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4319 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4320 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4321 | } |
4322 | ||
4323 | /* Set the cli tool unix socket path */ | |
4324 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4325 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4326 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4327 | } |
0fdd1e2c DG |
4328 | |
4329 | /* Set global SHM for ust */ | |
4330 | if (strlen(wait_shm_path) == 0) { | |
4331 | snprintf(wait_shm_path, PATH_MAX, | |
4332 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4333 | } | |
fac6795d DG |
4334 | } |
4335 | ||
847177cd DG |
4336 | DBG("Client socket path %s", client_unix_sock_path); |
4337 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4338 | DBG("LTTng run directory path: %s", rundir); |
4339 | ||
4340 | /* 32 bits consumerd path setup */ | |
4341 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4342 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4343 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4344 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4345 | |
4346 | DBG2("UST consumer 32 bits err path: %s", | |
4347 | ustconsumer32_data.err_unix_sock_path); | |
4348 | DBG2("UST consumer 32 bits cmd path: %s", | |
4349 | ustconsumer32_data.cmd_unix_sock_path); | |
4350 | ||
4351 | /* 64 bits consumerd path setup */ | |
4352 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4353 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4354 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4355 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4356 | |
4357 | DBG2("UST consumer 64 bits err path: %s", | |
4358 | ustconsumer64_data.err_unix_sock_path); | |
4359 | DBG2("UST consumer 64 bits cmd path: %s", | |
4360 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4361 | |
273ea72c | 4362 | /* |
7d8234d9 | 4363 | * See if daemon already exist. |
fac6795d | 4364 | */ |
7d8234d9 | 4365 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4366 | ERR("Already running daemon.\n"); |
273ea72c | 4367 | /* |
cf3af59e MD |
4368 | * We do not goto exit because we must not cleanup() |
4369 | * because a daemon is already running. | |
ab118b20 | 4370 | */ |
cf3af59e | 4371 | goto error; |
a88df331 DG |
4372 | } |
4373 | ||
54d01ffb | 4374 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4375 | |
4376 | /* | |
4377 | * These actions must be executed as root. We do that *after* setting up | |
4378 | * the sockets path because we MUST make the check for another daemon using | |
4379 | * those paths *before* trying to set the kernel consumer sockets and init | |
4380 | * kernel tracer. | |
4381 | */ | |
4382 | if (is_root) { | |
67e40797 | 4383 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4384 | if (ret < 0) { |
4385 | goto exit; | |
4386 | } | |
4387 | ||
a88df331 | 4388 | /* Setup kernel tracer */ |
4fba7219 DG |
4389 | if (!opt_no_kernel) { |
4390 | init_kernel_tracer(); | |
4391 | } | |
a88df331 DG |
4392 | |
4393 | /* Set ulimit for open files */ | |
4394 | set_ulimit(); | |
fac6795d DG |
4395 | } |
4396 | ||
67e40797 DG |
4397 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4398 | if (ret < 0) { | |
4399 | goto exit; | |
4400 | } | |
4401 | ||
4402 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4403 | if (ret < 0) { | |
4404 | goto exit; | |
4405 | } | |
4406 | ||
cf3af59e MD |
4407 | if ((ret = set_signal_handler()) < 0) { |
4408 | goto exit; | |
fac6795d DG |
4409 | } |
4410 | ||
d6f42150 | 4411 | /* Setup the needed unix socket */ |
cf3af59e MD |
4412 | if ((ret = init_daemon_socket()) < 0) { |
4413 | goto exit; | |
fac6795d DG |
4414 | } |
4415 | ||
4416 | /* Set credentials to socket */ | |
be040666 | 4417 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4418 | goto exit; |
fac6795d DG |
4419 | } |
4420 | ||
5b8719f5 DG |
4421 | /* Get parent pid if -S, --sig-parent is specified. */ |
4422 | if (opt_sig_parent) { | |
4423 | ppid = getppid(); | |
4424 | } | |
4425 | ||
7a485870 | 4426 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4427 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4428 | goto exit; | |
7a485870 DG |
4429 | } |
4430 | ||
099e26bd DG |
4431 | /* Setup the thread apps communication pipe. */ |
4432 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4433 | goto exit; | |
4434 | } | |
4435 | ||
4436 | /* Init UST command queue. */ | |
4437 | cds_wfq_init(&ust_cmd_queue.queue); | |
4438 | ||
f6a9efaa DG |
4439 | /* Init UST app hash table */ |
4440 | ust_app_ht_alloc(); | |
4441 | ||
273ea72c | 4442 | /* |
54d01ffb DG |
4443 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4444 | * statically declared in session.c | |
273ea72c | 4445 | */ |
54d01ffb | 4446 | session_list_ptr = session_get_list(); |
b5541356 | 4447 | |
5eb91c98 DG |
4448 | /* Set up max poll set size */ |
4449 | lttng_poll_set_max_size(); | |
4450 | ||
cf3af59e | 4451 | /* Create thread to manage the client socket */ |
099e26bd DG |
4452 | ret = pthread_create(&client_thread, NULL, |
4453 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4454 | if (ret != 0) { |
099e26bd | 4455 | perror("pthread_create clients"); |
cf3af59e MD |
4456 | goto exit_client; |
4457 | } | |
fac6795d | 4458 | |
099e26bd DG |
4459 | /* Create thread to dispatch registration */ |
4460 | ret = pthread_create(&dispatch_thread, NULL, | |
4461 | thread_dispatch_ust_registration, (void *) NULL); | |
4462 | if (ret != 0) { | |
4463 | perror("pthread_create dispatch"); | |
4464 | goto exit_dispatch; | |
4465 | } | |
4466 | ||
4467 | /* Create thread to manage application registration. */ | |
4468 | ret = pthread_create(®_apps_thread, NULL, | |
4469 | thread_registration_apps, (void *) NULL); | |
4470 | if (ret != 0) { | |
4471 | perror("pthread_create registration"); | |
4472 | goto exit_reg_apps; | |
4473 | } | |
4474 | ||
cf3af59e | 4475 | /* Create thread to manage application socket */ |
54d01ffb DG |
4476 | ret = pthread_create(&apps_thread, NULL, |
4477 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4478 | if (ret != 0) { |
099e26bd | 4479 | perror("pthread_create apps"); |
cf3af59e MD |
4480 | goto exit_apps; |
4481 | } | |
fac6795d | 4482 | |
cf3af59e | 4483 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4484 | ret = pthread_create(&kernel_thread, NULL, |
4485 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4486 | if (ret != 0) { |
099e26bd | 4487 | perror("pthread_create kernel"); |
cf3af59e MD |
4488 | goto exit_kernel; |
4489 | } | |
7a485870 | 4490 | |
cf3af59e MD |
4491 | ret = pthread_join(kernel_thread, &status); |
4492 | if (ret != 0) { | |
4493 | perror("pthread_join"); | |
4494 | goto error; /* join error, exit without cleanup */ | |
fac6795d DG |
4495 | } |
4496 | ||
cf3af59e MD |
4497 | exit_kernel: |
4498 | ret = pthread_join(apps_thread, &status); | |
4499 | if (ret != 0) { | |
4500 | perror("pthread_join"); | |
4501 | goto error; /* join error, exit without cleanup */ | |
4502 | } | |
fac6795d | 4503 | |
cf3af59e | 4504 | exit_apps: |
099e26bd DG |
4505 | ret = pthread_join(reg_apps_thread, &status); |
4506 | if (ret != 0) { | |
4507 | perror("pthread_join"); | |
4508 | goto error; /* join error, exit without cleanup */ | |
4509 | } | |
4510 | ||
4511 | exit_reg_apps: | |
4512 | ret = pthread_join(dispatch_thread, &status); | |
4513 | if (ret != 0) { | |
4514 | perror("pthread_join"); | |
4515 | goto error; /* join error, exit without cleanup */ | |
4516 | } | |
4517 | ||
4518 | exit_dispatch: | |
cf3af59e MD |
4519 | ret = pthread_join(client_thread, &status); |
4520 | if (ret != 0) { | |
4521 | perror("pthread_join"); | |
4522 | goto error; /* join error, exit without cleanup */ | |
4523 | } | |
4524 | ||
3bd1e081 | 4525 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4526 | if (ret != 0) { |
3bd1e081 | 4527 | perror("join_consumer"); |
cf3af59e MD |
4528 | goto error; /* join error, exit without cleanup */ |
4529 | } | |
a88df331 | 4530 | |
cf3af59e | 4531 | exit_client: |
a88df331 | 4532 | exit: |
cf3af59e MD |
4533 | /* |
4534 | * cleanup() is called when no other thread is running. | |
4535 | */ | |
f6a9efaa | 4536 | rcu_thread_online(); |
cf3af59e | 4537 | cleanup(); |
f6a9efaa DG |
4538 | rcu_thread_offline(); |
4539 | rcu_unregister_thread(); | |
67e40797 | 4540 | if (!ret) { |
cf3af59e | 4541 | exit(EXIT_SUCCESS); |
67e40797 | 4542 | } |
cf3af59e | 4543 | error: |
5e16da05 | 4544 | exit(EXIT_FAILURE); |
fac6795d | 4545 | } |