Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
54d01ffb DG |
5 | * This program is free software; you can redistribute it and/or modify it |
6 | * under the terms of the GNU General Public License as published by the Free | |
7 | * Software Foundation; only version 2 of the License. | |
91d76f53 | 8 | * |
54d01ffb DG |
9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
91d76f53 | 13 | * |
54d01ffb DG |
14 | * You should have received a copy of the GNU General Public License along with |
15 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple | |
16 | * Place - Suite 330, Boston, MA 02111-1307, USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
8c0faa1d | 24 | #include <semaphore.h> |
fac6795d DG |
25 | #include <signal.h> |
26 | #include <stdio.h> | |
27 | #include <stdlib.h> | |
28 | #include <string.h> | |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c DG |
35 | #include <sys/wait.h> |
36 | #include <urcu/futex.h> | |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
0ba98ebc | 41 | #include <common/compat/poll.h> |
d27c42b8 | 42 | #include <common/compat/socket.h> |
db758600 DG |
43 | #include <common/defaults.h> |
44 | #include <common/kernel-consumer/kernel-consumer.h> | |
45 | #include <common/ust-consumer/ust-consumer.h> | |
fac6795d | 46 | |
10a8a223 | 47 | #include "lttng-sessiond.h" |
54d01ffb | 48 | #include "channel.h" |
099e26bd | 49 | #include "context.h" |
54d01ffb | 50 | #include "event.h" |
099e26bd | 51 | #include "futex.h" |
4771f025 | 52 | #include "kernel.h" |
096102bd | 53 | #include "modprobe.h" |
0fdd1e2c | 54 | #include "shm.h" |
1e307fab | 55 | #include "ust-ctl.h" |
8e68d1c8 | 56 | #include "utils.h" |
fac6795d | 57 | |
ebaeda94 MD |
58 | #define CONSUMERD_FILE "lttng-consumerd" |
59 | ||
3bd1e081 MD |
60 | struct consumer_data { |
61 | enum lttng_consumer_type type; | |
62 | ||
63 | pthread_t thread; /* Worker thread interacting with the consumer */ | |
64 | sem_t sem; | |
65 | ||
66 | /* Mutex to control consumerd pid assignation */ | |
67 | pthread_mutex_t pid_mutex; | |
68 | pid_t pid; | |
69 | ||
70 | int err_sock; | |
71 | int cmd_sock; | |
72 | ||
73 | /* consumer error and command Unix socket path */ | |
74 | char err_unix_sock_path[PATH_MAX]; | |
75 | char cmd_unix_sock_path[PATH_MAX]; | |
76 | }; | |
77 | ||
75462a81 | 78 | /* Const values */ |
686204ab | 79 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 80 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
81 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
82 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
83 | ||
fac6795d | 84 | /* Variables */ |
1d4b027a | 85 | int opt_verbose; /* Not static for lttngerr.h */ |
3bd1e081 | 86 | int opt_verbose_consumer; /* Not static for lttngerr.h */ |
1d4b027a | 87 | int opt_quiet; /* Not static for lttngerr.h */ |
d063d709 | 88 | |
fac6795d DG |
89 | const char *progname; |
90 | const char *opt_tracing_group; | |
5b8719f5 | 91 | static int opt_sig_parent; |
fac6795d | 92 | static int opt_daemon; |
4fba7219 | 93 | static int opt_no_kernel; |
fac6795d | 94 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 95 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 96 | static char *rundir; |
3bd1e081 MD |
97 | |
98 | /* Consumer daemon specific control data */ | |
99 | static struct consumer_data kconsumer_data = { | |
100 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
101 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
102 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
3bd1e081 | 103 | }; |
7753dea8 MD |
104 | static struct consumer_data ustconsumer64_data = { |
105 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
106 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
107 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
7753dea8 MD |
108 | }; |
109 | static struct consumer_data ustconsumer32_data = { | |
110 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
111 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
112 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
3bd1e081 MD |
113 | }; |
114 | ||
099e26bd | 115 | static int dispatch_thread_exit; |
fac6795d | 116 | |
54d01ffb DG |
117 | /* Global application Unix socket path */ |
118 | static char apps_unix_sock_path[PATH_MAX]; | |
119 | /* Global client Unix socket path */ | |
120 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
121 | /* global wait shm path for UST */ |
122 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 123 | |
1d4b027a | 124 | /* Sockets and FDs */ |
d6f42150 DG |
125 | static int client_sock; |
126 | static int apps_sock; | |
20fe2104 | 127 | static int kernel_tracer_fd; |
7a485870 | 128 | static int kernel_poll_pipe[2]; |
1d4b027a | 129 | |
273ea72c DG |
130 | /* |
131 | * Quit pipe for all threads. This permits a single cancellation point | |
132 | * for all threads when receiving an event on the pipe. | |
133 | */ | |
134 | static int thread_quit_pipe[2]; | |
135 | ||
099e26bd DG |
136 | /* |
137 | * This pipe is used to inform the thread managing application communication | |
138 | * that a command is queued and ready to be processed. | |
139 | */ | |
140 | static int apps_cmd_pipe[2]; | |
141 | ||
1d4b027a | 142 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 143 | static pthread_t apps_thread; |
099e26bd | 144 | static pthread_t reg_apps_thread; |
1d4b027a | 145 | static pthread_t client_thread; |
7a485870 | 146 | static pthread_t kernel_thread; |
099e26bd | 147 | static pthread_t dispatch_thread; |
5eb91c98 | 148 | |
fac6795d | 149 | |
099e26bd DG |
150 | /* |
151 | * UST registration command queue. This queue is tied with a futex and uses a N | |
152 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
153 | * | |
154 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
155 | * this queue and the wait/wake scheme. | |
156 | */ | |
157 | static struct ust_cmd_queue ust_cmd_queue; | |
158 | ||
b5541356 DG |
159 | /* |
160 | * Pointer initialized before thread creation. | |
161 | * | |
162 | * This points to the tracing session list containing the session count and a | |
163 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
164 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 165 | * |
d063d709 | 166 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 167 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
168 | */ |
169 | static struct ltt_session_list *session_list_ptr; | |
170 | ||
7753dea8 MD |
171 | int ust_consumerd64_fd = -1; |
172 | int ust_consumerd32_fd = -1; | |
173 | ||
fb6f1fa2 YB |
174 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
175 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
176 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
177 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a MD |
178 | |
179 | static | |
7753dea8 | 180 | void setup_consumerd_path(void) |
fb09408a | 181 | { |
fc7a59ce | 182 | const char *bin, *libdir; |
fb09408a | 183 | |
7753dea8 MD |
184 | /* |
185 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
186 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
187 | * has not been defined. | |
7753dea8 | 188 | */ |
ebaeda94 | 189 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
190 | if (!consumerd32_bin[0]) { |
191 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
192 | } |
193 | if (!consumerd32_libdir[0]) { | |
194 | consumerd32_libdir = INSTALL_LIB_PATH; | |
195 | } | |
196 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
197 | if (!consumerd64_bin[0]) { |
198 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 199 | } |
ebaeda94 MD |
200 | if (!consumerd64_libdir[0]) { |
201 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
202 | } |
203 | #else | |
204 | #error "Unknown bitness" | |
205 | #endif | |
206 | ||
fb09408a MD |
207 | /* |
208 | * runtime env. var. overrides the build default. | |
209 | */ | |
fc7a59ce AM |
210 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
211 | if (bin) { | |
212 | consumerd32_bin = bin; | |
7753dea8 | 213 | } |
fc7a59ce AM |
214 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
215 | if (bin) { | |
216 | consumerd64_bin = bin; | |
ebaeda94 | 217 | } |
72f579ee | 218 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
219 | if (libdir) { |
220 | consumerd32_libdir = libdir; | |
221 | } | |
72f579ee | 222 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
223 | if (libdir) { |
224 | consumerd64_libdir = libdir; | |
fb09408a MD |
225 | } |
226 | } | |
227 | ||
5eb91c98 DG |
228 | /* |
229 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
230 | */ | |
231 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
232 | unsigned int size) | |
233 | { | |
234 | int ret; | |
235 | ||
236 | if (events == NULL || size == 0) { | |
237 | ret = -1; | |
238 | goto error; | |
239 | } | |
240 | ||
241 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
242 | if (ret < 0) { | |
243 | goto error; | |
244 | } | |
245 | ||
246 | /* Add quit pipe */ | |
247 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
248 | if (ret < 0) { | |
249 | goto error; | |
250 | } | |
251 | ||
252 | return 0; | |
253 | ||
254 | error: | |
255 | return ret; | |
256 | } | |
257 | ||
258 | /* | |
259 | * Check if the thread quit pipe was triggered. | |
260 | * | |
261 | * Return 1 if it was triggered else 0; | |
262 | */ | |
263 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
264 | { | |
265 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
266 | return 1; | |
267 | } | |
268 | ||
269 | return 0; | |
270 | } | |
271 | ||
0fdd1e2c DG |
272 | /* |
273 | * Return group ID of the tracing group or -1 if not found. | |
274 | */ | |
996b65c8 MD |
275 | static gid_t allowed_group(void) |
276 | { | |
277 | struct group *grp; | |
278 | ||
274e143b MD |
279 | if (opt_tracing_group) { |
280 | grp = getgrnam(opt_tracing_group); | |
281 | } else { | |
282 | grp = getgrnam(default_tracing_group); | |
283 | } | |
996b65c8 MD |
284 | if (!grp) { |
285 | return -1; | |
286 | } else { | |
287 | return grp->gr_gid; | |
288 | } | |
289 | } | |
290 | ||
273ea72c | 291 | /* |
5eb91c98 | 292 | * Init thread quit pipe. |
273ea72c DG |
293 | * |
294 | * Return -1 on error or 0 if all pipes are created. | |
295 | */ | |
296 | static int init_thread_quit_pipe(void) | |
297 | { | |
730389d9 | 298 | int ret, i; |
273ea72c | 299 | |
730389d9 | 300 | ret = pipe(thread_quit_pipe); |
273ea72c | 301 | if (ret < 0) { |
730389d9 | 302 | PERROR("thread quit pipe"); |
273ea72c DG |
303 | goto error; |
304 | } | |
305 | ||
730389d9 DG |
306 | for (i = 0; i < 2; i++) { |
307 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
308 | if (ret < 0) { | |
309 | PERROR("fcntl"); | |
310 | goto error; | |
311 | } | |
312 | } | |
313 | ||
273ea72c DG |
314 | error: |
315 | return ret; | |
316 | } | |
317 | ||
fac6795d | 318 | /* |
d063d709 DG |
319 | * Complete teardown of a kernel session. This free all data structure related |
320 | * to a kernel session and update counter. | |
fac6795d | 321 | */ |
1d4b027a | 322 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 323 | { |
8f7a84dd | 324 | if (!session->kernel_session) { |
99bab54f | 325 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 326 | return; |
8f7a84dd DG |
327 | } |
328 | ||
84ea9c99 | 329 | DBG("Tearing down kernel session"); |
d9800920 | 330 | |
84ea9c99 MD |
331 | /* |
332 | * If a custom kernel consumer was registered, close the socket before | |
333 | * tearing down the complete kernel session structure | |
334 | */ | |
335 | if (session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
336 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); | |
fac6795d | 337 | } |
84ea9c99 MD |
338 | |
339 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
340 | } |
341 | ||
f6a9efaa DG |
342 | /* |
343 | * Complete teardown of all UST sessions. This will free everything on his path | |
344 | * and destroy the core essence of all ust sessions :) | |
345 | */ | |
346 | static void teardown_ust_session(struct ltt_session *session) | |
347 | { | |
84cd17c6 MD |
348 | int ret; |
349 | ||
8f7a84dd | 350 | if (!session->ust_session) { |
99bab54f | 351 | DBG3("No UST session when tearing down session"); |
f470a390 | 352 | return; |
8f7a84dd DG |
353 | } |
354 | ||
84ea9c99 | 355 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 356 | |
84cd17c6 MD |
357 | ret = ust_app_destroy_trace_all(session->ust_session); |
358 | if (ret) { | |
359 | ERR("Error in ust_app_destroy_trace_all"); | |
360 | } | |
8f7a84dd | 361 | |
f6a9efaa DG |
362 | trace_ust_destroy_session(session->ust_session); |
363 | } | |
364 | ||
099e26bd DG |
365 | /* |
366 | * Stop all threads by closing the thread quit pipe. | |
367 | */ | |
cf3af59e MD |
368 | static void stop_threads(void) |
369 | { | |
5eb91c98 DG |
370 | int ret; |
371 | ||
cf3af59e MD |
372 | /* Stopping all threads */ |
373 | DBG("Terminating all threads"); | |
54d01ffb | 374 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
375 | if (ret < 0) { |
376 | ERR("write error on thread quit pipe"); | |
377 | } | |
378 | ||
099e26bd DG |
379 | /* Dispatch thread */ |
380 | dispatch_thread_exit = 1; | |
381 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
382 | } |
383 | ||
fac6795d | 384 | /* |
d063d709 | 385 | * Cleanup the daemon |
fac6795d | 386 | */ |
cf3af59e | 387 | static void cleanup(void) |
fac6795d | 388 | { |
1d4b027a DG |
389 | int ret; |
390 | char *cmd; | |
af9737e9 | 391 | struct ltt_session *sess, *stmp; |
fac6795d | 392 | |
1d4b027a | 393 | DBG("Cleaning up"); |
e07ae692 | 394 | |
67e40797 DG |
395 | DBG("Removing %s directory", rundir); |
396 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
397 | if (ret < 0) { | |
398 | ERR("asprintf failed. Something is really wrong!"); | |
399 | } | |
5461b305 | 400 | |
67e40797 DG |
401 | /* Remove lttng run directory */ |
402 | ret = system(cmd); | |
403 | if (ret < 0) { | |
404 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 405 | } |
67e40797 | 406 | free(cmd); |
5461b305 | 407 | |
99bab54f | 408 | DBG("Cleaning up all sessions"); |
fac6795d | 409 | |
b5541356 | 410 | /* Destroy session list mutex */ |
273ea72c DG |
411 | if (session_list_ptr != NULL) { |
412 | pthread_mutex_destroy(&session_list_ptr->lock); | |
413 | ||
414 | /* Cleanup ALL session */ | |
54d01ffb DG |
415 | cds_list_for_each_entry_safe(sess, stmp, |
416 | &session_list_ptr->head, list) { | |
273ea72c | 417 | teardown_kernel_session(sess); |
f6a9efaa DG |
418 | teardown_ust_session(sess); |
419 | free(sess); | |
273ea72c DG |
420 | } |
421 | } | |
422 | ||
099e26bd | 423 | DBG("Closing all UST sockets"); |
56fff090 | 424 | ust_app_clean_list(); |
099e26bd | 425 | |
3bd1e081 | 426 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 427 | |
4fba7219 DG |
428 | if (is_root && !opt_no_kernel) { |
429 | DBG2("Closing kernel fd"); | |
430 | close(kernel_tracer_fd); | |
2f50c8a3 | 431 | DBG("Unloading kernel modules"); |
096102bd | 432 | modprobe_remove_lttng_all(); |
2f50c8a3 | 433 | } |
5eb91c98 DG |
434 | |
435 | close(thread_quit_pipe[0]); | |
436 | close(thread_quit_pipe[1]); | |
421cb601 DG |
437 | |
438 | /* <fun> */ | |
f56a39af | 439 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
440 | "Matthew, BEET driven development works!%c[%dm", |
441 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
442 | /* </fun> */ | |
fac6795d DG |
443 | } |
444 | ||
e065084a | 445 | /* |
d063d709 | 446 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 447 | * |
d063d709 | 448 | * Return lttcomm error code. |
e065084a DG |
449 | */ |
450 | static int send_unix_sock(int sock, void *buf, size_t len) | |
451 | { | |
452 | /* Check valid length */ | |
453 | if (len <= 0) { | |
454 | return -1; | |
455 | } | |
456 | ||
457 | return lttcomm_send_unix_sock(sock, buf, len); | |
458 | } | |
459 | ||
5461b305 | 460 | /* |
d063d709 | 461 | * Free memory of a command context structure. |
5461b305 | 462 | */ |
a2fb29a5 | 463 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 464 | { |
a2fb29a5 DG |
465 | DBG("Clean command context structure"); |
466 | if (*cmd_ctx) { | |
467 | if ((*cmd_ctx)->llm) { | |
468 | free((*cmd_ctx)->llm); | |
5461b305 | 469 | } |
a2fb29a5 DG |
470 | if ((*cmd_ctx)->lsm) { |
471 | free((*cmd_ctx)->lsm); | |
5461b305 | 472 | } |
a2fb29a5 DG |
473 | free(*cmd_ctx); |
474 | *cmd_ctx = NULL; | |
5461b305 DG |
475 | } |
476 | } | |
477 | ||
f3ed775e | 478 | /* |
d063d709 | 479 | * Send all stream fds of kernel channel to the consumer. |
f3ed775e | 480 | */ |
2bdd86d4 | 481 | static int send_kconsumer_channel_streams(struct consumer_data *consumer_data, |
6df2e2c9 MD |
482 | int sock, struct ltt_kernel_channel *channel, |
483 | uid_t uid, gid_t gid) | |
f3ed775e DG |
484 | { |
485 | int ret; | |
f3ed775e | 486 | struct ltt_kernel_stream *stream; |
3bd1e081 | 487 | struct lttcomm_consumer_msg lkm; |
f3ed775e | 488 | |
3bd1e081 | 489 | DBG("Sending streams of channel %s to kernel consumer", |
54d01ffb | 490 | channel->channel->name); |
f3ed775e | 491 | |
3bd1e081 MD |
492 | /* Send channel */ |
493 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
494 | lkm.u.channel.channel_key = channel->fd; | |
495 | lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size; | |
496 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
2bdd86d4 | 497 | DBG("Sending channel %d to consumer", lkm.u.channel.channel_key); |
3bd1e081 | 498 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); |
f3ed775e | 499 | if (ret < 0) { |
3bd1e081 | 500 | perror("send consumer channel"); |
f3ed775e DG |
501 | goto error; |
502 | } | |
503 | ||
3bd1e081 | 504 | /* Send streams */ |
7a485870 | 505 | cds_list_for_each_entry(stream, &channel->stream_list.head, list) { |
3bd1e081 MD |
506 | if (!stream->fd) { |
507 | continue; | |
508 | } | |
509 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
510 | lkm.u.stream.channel_key = channel->fd; | |
511 | lkm.u.stream.stream_key = stream->fd; | |
512 | lkm.u.stream.state = stream->state; | |
513 | lkm.u.stream.output = channel->channel->attr.output; | |
514 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
515 | lkm.u.stream.uid = uid; |
516 | lkm.u.stream.gid = gid; | |
3bd1e081 MD |
517 | strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1); |
518 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
519 | DBG("Sending stream %d to consumer", lkm.u.stream.stream_key); | |
520 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
521 | if (ret < 0) { | |
522 | perror("send consumer stream"); | |
523 | goto error; | |
524 | } | |
525 | ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1); | |
526 | if (ret < 0) { | |
527 | perror("send consumer stream ancillary data"); | |
528 | goto error; | |
f3ed775e DG |
529 | } |
530 | } | |
531 | ||
3bd1e081 | 532 | DBG("consumer channel streams sent"); |
f3ed775e DG |
533 | |
534 | return 0; | |
535 | ||
536 | error: | |
537 | return ret; | |
538 | } | |
539 | ||
540 | /* | |
d063d709 | 541 | * Send all stream fds of the kernel session to the consumer. |
f3ed775e | 542 | */ |
2bdd86d4 | 543 | static int send_kconsumer_session_streams(struct consumer_data *consumer_data, |
3bd1e081 | 544 | struct ltt_kernel_session *session) |
f3ed775e DG |
545 | { |
546 | int ret; | |
547 | struct ltt_kernel_channel *chan; | |
3bd1e081 MD |
548 | struct lttcomm_consumer_msg lkm; |
549 | int sock = session->consumer_fd; | |
7a485870 DG |
550 | |
551 | DBG("Sending metadata stream fd"); | |
552 | ||
2bdd86d4 | 553 | /* Extra protection. It's NOT supposed to be set to 0 at this point */ |
d9800920 | 554 | if (session->consumer_fd == 0) { |
3bd1e081 | 555 | session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
556 | } |
557 | ||
7a485870 | 558 | if (session->metadata_stream_fd != 0) { |
3bd1e081 MD |
559 | /* Send metadata channel fd */ |
560 | lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL; | |
561 | lkm.u.channel.channel_key = session->metadata->fd; | |
562 | lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size; | |
563 | lkm.u.channel.mmap_len = 0; /* for kernel */ | |
564 | DBG("Sending metadata channel %d to consumer", lkm.u.stream.stream_key); | |
565 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
566 | if (ret < 0) { | |
567 | perror("send consumer channel"); | |
568 | goto error; | |
569 | } | |
570 | ||
571 | /* Send metadata stream fd */ | |
572 | lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM; | |
573 | lkm.u.stream.channel_key = session->metadata->fd; | |
574 | lkm.u.stream.stream_key = session->metadata_stream_fd; | |
575 | lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM; | |
576 | lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT; | |
577 | lkm.u.stream.mmap_len = 0; /* for kernel */ | |
6df2e2c9 MD |
578 | lkm.u.stream.uid = session->uid; |
579 | lkm.u.stream.gid = session->gid; | |
3bd1e081 MD |
580 | strncpy(lkm.u.stream.path_name, session->metadata->pathname, PATH_MAX - 1); |
581 | lkm.u.stream.path_name[PATH_MAX - 1] = '\0'; | |
582 | DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key); | |
583 | ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm)); | |
584 | if (ret < 0) { | |
585 | perror("send consumer stream"); | |
586 | goto error; | |
587 | } | |
588 | ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1); | |
7a485870 | 589 | if (ret < 0) { |
3bd1e081 | 590 | perror("send consumer stream"); |
7a485870 DG |
591 | goto error; |
592 | } | |
593 | } | |
f3ed775e | 594 | |
f3ed775e | 595 | cds_list_for_each_entry(chan, &session->channel_list.head, list) { |
6df2e2c9 MD |
596 | ret = send_kconsumer_channel_streams(consumer_data, sock, chan, |
597 | session->uid, session->gid); | |
2bdd86d4 MD |
598 | if (ret < 0) { |
599 | goto error; | |
600 | } | |
601 | } | |
602 | ||
603 | DBG("consumer fds (metadata and channel streams) sent"); | |
604 | ||
605 | return 0; | |
606 | ||
607 | error: | |
608 | return ret; | |
609 | } | |
610 | ||
fac6795d | 611 | /* |
0fdd1e2c | 612 | * Notify UST applications using the shm mmap futex. |
fac6795d | 613 | */ |
0fdd1e2c | 614 | static int notify_ust_apps(int active) |
fac6795d | 615 | { |
0fdd1e2c | 616 | char *wait_shm_mmap; |
fac6795d | 617 | |
0fdd1e2c | 618 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 619 | |
0fdd1e2c DG |
620 | /* See shm.c for this call implying mmap, shm and futex calls */ |
621 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
622 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
623 | goto error; |
624 | } | |
625 | ||
0fdd1e2c DG |
626 | /* Wake waiting process */ |
627 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
628 | ||
629 | /* Apps notified successfully */ | |
630 | return 0; | |
fac6795d DG |
631 | |
632 | error: | |
0fdd1e2c | 633 | return -1; |
fac6795d DG |
634 | } |
635 | ||
e065084a | 636 | /* |
d063d709 DG |
637 | * Setup the outgoing data buffer for the response (llm) by allocating the |
638 | * right amount of memory and copying the original information from the lsm | |
639 | * structure. | |
ca95a216 | 640 | * |
d063d709 | 641 | * Return total size of the buffer pointed by buf. |
ca95a216 | 642 | */ |
5461b305 | 643 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 644 | { |
f3ed775e | 645 | int ret, buf_size; |
ca95a216 | 646 | |
f3ed775e | 647 | buf_size = size; |
5461b305 | 648 | |
ba7f0ae5 | 649 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 650 | if (cmd_ctx->llm == NULL) { |
ba7f0ae5 | 651 | perror("zmalloc"); |
5461b305 | 652 | ret = -ENOMEM; |
ca95a216 DG |
653 | goto error; |
654 | } | |
655 | ||
5461b305 DG |
656 | /* Copy common data */ |
657 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 658 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 659 | |
5461b305 DG |
660 | cmd_ctx->llm->data_size = size; |
661 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
662 | ||
ca95a216 DG |
663 | return buf_size; |
664 | ||
665 | error: | |
666 | return ret; | |
667 | } | |
668 | ||
7a485870 | 669 | /* |
5eb91c98 | 670 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 671 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 672 | */ |
5eb91c98 | 673 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 674 | { |
5eb91c98 | 675 | int ret; |
7a485870 DG |
676 | struct ltt_session *session; |
677 | struct ltt_kernel_channel *channel; | |
678 | ||
5eb91c98 | 679 | DBG("Updating kernel poll set"); |
7a485870 | 680 | |
54d01ffb | 681 | session_lock_list(); |
b5541356 | 682 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 683 | session_lock(session); |
7a485870 | 684 | if (session->kernel_session == NULL) { |
54d01ffb | 685 | session_unlock(session); |
7a485870 DG |
686 | continue; |
687 | } | |
7a485870 | 688 | |
54d01ffb DG |
689 | cds_list_for_each_entry(channel, |
690 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
691 | /* Add channel fd to the kernel poll set */ |
692 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
693 | if (ret < 0) { | |
54d01ffb | 694 | session_unlock(session); |
5eb91c98 DG |
695 | goto error; |
696 | } | |
697 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 698 | } |
54d01ffb | 699 | session_unlock(session); |
7a485870 | 700 | } |
54d01ffb | 701 | session_unlock_list(); |
7a485870 | 702 | |
5eb91c98 | 703 | return 0; |
7a485870 DG |
704 | |
705 | error: | |
54d01ffb | 706 | session_unlock_list(); |
7a485870 DG |
707 | return -1; |
708 | } | |
709 | ||
710 | /* | |
54d01ffb | 711 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 712 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 713 | * |
d063d709 | 714 | * Useful for CPU hotplug feature. |
7a485870 | 715 | */ |
2bdd86d4 | 716 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
717 | { |
718 | int ret = 0; | |
719 | struct ltt_session *session; | |
720 | struct ltt_kernel_channel *channel; | |
721 | ||
722 | DBG("Updating kernel streams for channel fd %d", fd); | |
723 | ||
54d01ffb | 724 | session_lock_list(); |
b5541356 | 725 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 726 | session_lock(session); |
7a485870 | 727 | if (session->kernel_session == NULL) { |
54d01ffb | 728 | session_unlock(session); |
7a485870 DG |
729 | continue; |
730 | } | |
d9800920 DG |
731 | |
732 | /* This is not suppose to be 0 but this is an extra security check */ | |
733 | if (session->kernel_session->consumer_fd == 0) { | |
3bd1e081 | 734 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
735 | } |
736 | ||
5eb91c98 DG |
737 | cds_list_for_each_entry(channel, |
738 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
739 | if (channel->fd == fd) { |
740 | DBG("Channel found, updating kernel streams"); | |
741 | ret = kernel_open_channel_stream(channel); | |
742 | if (ret < 0) { | |
b3c750d2 | 743 | goto error; |
7a485870 | 744 | } |
d9800920 | 745 | |
7a485870 | 746 | /* |
5eb91c98 DG |
747 | * Have we already sent fds to the consumer? If yes, it means |
748 | * that tracing is started so it is safe to send our updated | |
749 | * stream fds. | |
7a485870 | 750 | */ |
3bd1e081 | 751 | if (session->kernel_session->consumer_fds_sent == 1) { |
2bdd86d4 | 752 | ret = send_kconsumer_channel_streams(consumer_data, |
6df2e2c9 MD |
753 | session->kernel_session->consumer_fd, channel, |
754 | session->uid, session->gid); | |
7a485870 | 755 | if (ret < 0) { |
b3c750d2 | 756 | goto error; |
7a485870 DG |
757 | } |
758 | } | |
b3c750d2 | 759 | goto error; |
7a485870 DG |
760 | } |
761 | } | |
54d01ffb | 762 | session_unlock(session); |
7a485870 | 763 | } |
54d01ffb | 764 | session_unlock_list(); |
b3c750d2 | 765 | return ret; |
7a485870 | 766 | |
b3c750d2 | 767 | error: |
54d01ffb DG |
768 | session_unlock(session); |
769 | session_unlock_list(); | |
7a485870 DG |
770 | return ret; |
771 | } | |
772 | ||
487cf67c DG |
773 | /* |
774 | * For each tracing session, update newly registered apps. | |
775 | */ | |
776 | static void update_ust_app(int app_sock) | |
777 | { | |
778 | struct ltt_session *sess, *stmp; | |
779 | ||
4ee14516 DG |
780 | session_lock_list(); |
781 | ||
487cf67c DG |
782 | /* For all tracing session(s) */ |
783 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 784 | session_lock(sess); |
421cb601 DG |
785 | if (sess->ust_session) { |
786 | ust_app_global_update(sess->ust_session, app_sock); | |
787 | } | |
4ee14516 | 788 | session_unlock(sess); |
487cf67c | 789 | } |
4ee14516 DG |
790 | |
791 | session_unlock_list(); | |
487cf67c DG |
792 | } |
793 | ||
7a485870 | 794 | /* |
d063d709 | 795 | * This thread manage event coming from the kernel. |
7a485870 | 796 | * |
d063d709 DG |
797 | * Features supported in this thread: |
798 | * -) CPU Hotplug | |
7a485870 DG |
799 | */ |
800 | static void *thread_manage_kernel(void *data) | |
801 | { | |
5eb91c98 DG |
802 | int ret, i, pollfd, update_poll_flag = 1; |
803 | uint32_t revents, nb_fd; | |
7a485870 | 804 | char tmp; |
5eb91c98 | 805 | struct lttng_poll_event events; |
7a485870 DG |
806 | |
807 | DBG("Thread manage kernel started"); | |
808 | ||
5eb91c98 DG |
809 | ret = create_thread_poll_set(&events, 2); |
810 | if (ret < 0) { | |
811 | goto error; | |
812 | } | |
813 | ||
814 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
815 | if (ret < 0) { | |
816 | goto error; | |
817 | } | |
818 | ||
7a485870 DG |
819 | while (1) { |
820 | if (update_poll_flag == 1) { | |
5f822d0a DG |
821 | /* |
822 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
823 | * quit pipe and the kernel pipe. | |
824 | */ | |
825 | events.nb_fd = 2; | |
826 | ||
5eb91c98 DG |
827 | ret = update_kernel_poll(&events); |
828 | if (ret < 0) { | |
7a485870 DG |
829 | goto error; |
830 | } | |
831 | update_poll_flag = 0; | |
832 | } | |
833 | ||
5eb91c98 DG |
834 | nb_fd = LTTNG_POLL_GETNB(&events); |
835 | ||
836 | DBG("Thread kernel polling on %d fds", nb_fd); | |
837 | ||
838 | /* Zeroed the poll events */ | |
839 | lttng_poll_reset(&events); | |
7a485870 DG |
840 | |
841 | /* Poll infinite value of time */ | |
88f2b785 | 842 | restart: |
5eb91c98 | 843 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 844 | if (ret < 0) { |
88f2b785 MD |
845 | /* |
846 | * Restart interrupted system call. | |
847 | */ | |
848 | if (errno == EINTR) { | |
849 | goto restart; | |
850 | } | |
7a485870 DG |
851 | goto error; |
852 | } else if (ret == 0) { | |
853 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
854 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
855 | "This should not have happened! Continuing..."); | |
7a485870 DG |
856 | continue; |
857 | } | |
858 | ||
5eb91c98 DG |
859 | for (i = 0; i < nb_fd; i++) { |
860 | /* Fetch once the poll data */ | |
861 | revents = LTTNG_POLL_GETEV(&events, i); | |
862 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 863 | |
5eb91c98 DG |
864 | /* Thread quit pipe has been closed. Killing thread. */ |
865 | ret = check_thread_quit_pipe(pollfd, revents); | |
866 | if (ret) { | |
867 | goto error; | |
868 | } | |
7a485870 | 869 | |
5eb91c98 DG |
870 | /* Check for data on kernel pipe */ |
871 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
872 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
873 | update_poll_flag = 1; | |
874 | continue; | |
875 | } else { | |
876 | /* | |
877 | * New CPU detected by the kernel. Adding kernel stream to | |
878 | * kernel session and updating the kernel consumer | |
879 | */ | |
880 | if (revents & LPOLLIN) { | |
2bdd86d4 | 881 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
882 | if (ret < 0) { |
883 | continue; | |
884 | } | |
885 | break; | |
886 | /* | |
887 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
888 | * and unregister kernel stream at this point. | |
889 | */ | |
7a485870 | 890 | } |
7a485870 DG |
891 | } |
892 | } | |
893 | } | |
894 | ||
895 | error: | |
896 | DBG("Kernel thread dying"); | |
273ea72c DG |
897 | close(kernel_poll_pipe[0]); |
898 | close(kernel_poll_pipe[1]); | |
5eb91c98 DG |
899 | |
900 | lttng_poll_clean(&events); | |
901 | ||
7a485870 DG |
902 | return NULL; |
903 | } | |
904 | ||
1d4b027a | 905 | /* |
3bd1e081 | 906 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 907 | */ |
3bd1e081 | 908 | static void *thread_manage_consumer(void *data) |
1d4b027a | 909 | { |
5eb91c98 DG |
910 | int sock = 0, i, ret, pollfd; |
911 | uint32_t revents, nb_fd; | |
1d4b027a | 912 | enum lttcomm_return_code code; |
5eb91c98 | 913 | struct lttng_poll_event events; |
3bd1e081 | 914 | struct consumer_data *consumer_data = data; |
1d4b027a | 915 | |
3bd1e081 | 916 | DBG("[thread] Manage consumer started"); |
1d4b027a | 917 | |
3bd1e081 | 918 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
919 | if (ret < 0) { |
920 | goto error; | |
921 | } | |
922 | ||
5eb91c98 DG |
923 | /* |
924 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
925 | * Nothing more will be added to this poll set. | |
926 | */ | |
927 | ret = create_thread_poll_set(&events, 2); | |
928 | if (ret < 0) { | |
929 | goto error; | |
930 | } | |
273ea72c | 931 | |
3bd1e081 | 932 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
933 | if (ret < 0) { |
934 | goto error; | |
935 | } | |
936 | ||
937 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
938 | |
939 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 940 | restart: |
5eb91c98 | 941 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 942 | if (ret < 0) { |
88f2b785 MD |
943 | /* |
944 | * Restart interrupted system call. | |
945 | */ | |
946 | if (errno == EINTR) { | |
947 | goto restart; | |
948 | } | |
273ea72c DG |
949 | goto error; |
950 | } | |
951 | ||
5eb91c98 DG |
952 | for (i = 0; i < nb_fd; i++) { |
953 | /* Fetch once the poll data */ | |
954 | revents = LTTNG_POLL_GETEV(&events, i); | |
955 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
956 | ||
957 | /* Thread quit pipe has been closed. Killing thread. */ | |
958 | ret = check_thread_quit_pipe(pollfd, revents); | |
959 | if (ret) { | |
960 | goto error; | |
961 | } | |
962 | ||
963 | /* Event on the registration socket */ | |
3bd1e081 | 964 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 965 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 966 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
967 | goto error; |
968 | } | |
969 | } | |
273ea72c DG |
970 | } |
971 | ||
3bd1e081 | 972 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
973 | if (sock < 0) { |
974 | goto error; | |
975 | } | |
976 | ||
3bd1e081 | 977 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 978 | |
712ea556 | 979 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
980 | ret = lttcomm_recv_unix_sock(sock, &code, |
981 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
982 | if (ret <= 0) { |
983 | goto error; | |
984 | } | |
985 | ||
3bd1e081 MD |
986 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
987 | consumer_data->cmd_sock = | |
988 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
989 | if (consumer_data->cmd_sock < 0) { | |
990 | sem_post(&consumer_data->sem); | |
48842b30 | 991 | PERROR("consumer connect"); |
1d4b027a DG |
992 | goto error; |
993 | } | |
994 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
995 | sem_post(&consumer_data->sem); |
996 | DBG("consumer command socket ready"); | |
1d4b027a | 997 | } else { |
3bd1e081 | 998 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
999 | lttcomm_get_readable_code(-code)); |
1000 | goto error; | |
1001 | } | |
1002 | ||
54d01ffb | 1003 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 1004 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1005 | if (ret < 0) { |
72079cae DG |
1006 | goto error; |
1007 | } | |
1008 | ||
5eb91c98 DG |
1009 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1010 | if (ret < 0) { | |
72079cae | 1011 | goto error; |
5eb91c98 DG |
1012 | } |
1013 | ||
1014 | /* Update number of fd */ | |
1015 | nb_fd = LTTNG_POLL_GETNB(&events); | |
1016 | ||
1017 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1018 | restart_poll: |
5eb91c98 DG |
1019 | ret = lttng_poll_wait(&events, -1); |
1020 | if (ret < 0) { | |
88f2b785 MD |
1021 | /* |
1022 | * Restart interrupted system call. | |
1023 | */ | |
1024 | if (errno == EINTR) { | |
1025 | goto restart_poll; | |
1026 | } | |
72079cae DG |
1027 | goto error; |
1028 | } | |
1029 | ||
5eb91c98 DG |
1030 | for (i = 0; i < nb_fd; i++) { |
1031 | /* Fetch once the poll data */ | |
1032 | revents = LTTNG_POLL_GETEV(&events, i); | |
1033 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1034 | ||
1035 | /* Thread quit pipe has been closed. Killing thread. */ | |
1036 | ret = check_thread_quit_pipe(pollfd, revents); | |
1037 | if (ret) { | |
1038 | goto error; | |
1039 | } | |
1040 | ||
1041 | /* Event on the kconsumerd socket */ | |
1042 | if (pollfd == sock) { | |
1043 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1044 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1045 | goto error; |
1046 | } | |
1047 | } | |
1048 | } | |
1049 | ||
712ea556 | 1050 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1051 | ret = lttcomm_recv_unix_sock(sock, &code, |
1052 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1053 | if (ret <= 0) { |
3bd1e081 | 1054 | ERR("consumer closed the command socket"); |
712ea556 | 1055 | goto error; |
6f61d021 | 1056 | } |
1d4b027a | 1057 | |
3bd1e081 | 1058 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1059 | |
1d4b027a | 1060 | error: |
3bd1e081 MD |
1061 | DBG("consumer thread dying"); |
1062 | close(consumer_data->err_sock); | |
1063 | close(consumer_data->cmd_sock); | |
5eb91c98 | 1064 | close(sock); |
273ea72c | 1065 | |
3bd1e081 MD |
1066 | unlink(consumer_data->err_unix_sock_path); |
1067 | unlink(consumer_data->cmd_unix_sock_path); | |
1068 | consumer_data->pid = 0; | |
1d4b027a | 1069 | |
5eb91c98 | 1070 | lttng_poll_clean(&events); |
0177d773 | 1071 | |
5eb91c98 | 1072 | return NULL; |
099e26bd DG |
1073 | } |
1074 | ||
099e26bd DG |
1075 | /* |
1076 | * This thread manage application communication. | |
1d4b027a DG |
1077 | */ |
1078 | static void *thread_manage_apps(void *data) | |
099e26bd | 1079 | { |
5eb91c98 DG |
1080 | int i, ret, pollfd; |
1081 | uint32_t revents, nb_fd; | |
099e26bd | 1082 | struct ust_command ust_cmd; |
5eb91c98 | 1083 | struct lttng_poll_event events; |
099e26bd DG |
1084 | |
1085 | DBG("[thread] Manage application started"); | |
1086 | ||
f6a9efaa DG |
1087 | rcu_register_thread(); |
1088 | rcu_thread_online(); | |
1089 | ||
5eb91c98 DG |
1090 | ret = create_thread_poll_set(&events, 2); |
1091 | if (ret < 0) { | |
1092 | goto error; | |
1093 | } | |
099e26bd | 1094 | |
5eb91c98 DG |
1095 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1096 | if (ret < 0) { | |
1097 | goto error; | |
1098 | } | |
099e26bd | 1099 | |
5eb91c98 DG |
1100 | while (1) { |
1101 | /* Zeroed the events structure */ | |
1102 | lttng_poll_reset(&events); | |
0177d773 | 1103 | |
5eb91c98 | 1104 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1105 | |
1106 | DBG("Apps thread polling on %d fds", nb_fd); | |
1107 | ||
1108 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1109 | restart: |
5eb91c98 | 1110 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1111 | if (ret < 0) { |
88f2b785 MD |
1112 | /* |
1113 | * Restart interrupted system call. | |
1114 | */ | |
1115 | if (errno == EINTR) { | |
1116 | goto restart; | |
1117 | } | |
099e26bd DG |
1118 | goto error; |
1119 | } | |
1120 | ||
5eb91c98 DG |
1121 | for (i = 0; i < nb_fd; i++) { |
1122 | /* Fetch once the poll data */ | |
1123 | revents = LTTNG_POLL_GETEV(&events, i); | |
1124 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1125 | ||
1126 | /* Thread quit pipe has been closed. Killing thread. */ | |
1127 | ret = check_thread_quit_pipe(pollfd, revents); | |
1128 | if (ret) { | |
099e26bd | 1129 | goto error; |
5eb91c98 | 1130 | } |
099e26bd | 1131 | |
5eb91c98 DG |
1132 | /* Inspect the apps cmd pipe */ |
1133 | if (pollfd == apps_cmd_pipe[0]) { | |
1134 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1135 | ERR("Apps command pipe error"); | |
0177d773 | 1136 | goto error; |
5eb91c98 DG |
1137 | } else if (revents & LPOLLIN) { |
1138 | /* Empty pipe */ | |
1139 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1140 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
1141 | perror("read apps cmd pipe"); | |
1142 | goto error; | |
1143 | } | |
099e26bd | 1144 | |
5eb91c98 | 1145 | /* Register applicaton to the session daemon */ |
56fff090 | 1146 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1147 | ust_cmd.sock); |
88ff5b7f | 1148 | if (ret == -ENOMEM) { |
5eb91c98 | 1149 | goto error; |
88ff5b7f MD |
1150 | } else if (ret < 0) { |
1151 | break; | |
5eb91c98 DG |
1152 | } |
1153 | ||
acc7b41b | 1154 | /* |
e0c7ec2b | 1155 | * Validate UST version compatibility. |
acc7b41b | 1156 | */ |
e0c7ec2b DG |
1157 | ret = ust_app_validate_version(ust_cmd.sock); |
1158 | if (ret >= 0) { | |
1159 | /* | |
1160 | * Add channel(s) and event(s) to newly registered apps | |
1161 | * from lttng global UST domain. | |
1162 | */ | |
1163 | update_ust_app(ust_cmd.sock); | |
1164 | } | |
acc7b41b | 1165 | |
f2ca2e25 | 1166 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1167 | if (ret < 0) { |
1168 | /* | |
1169 | * If the registration is not possible, we simply | |
1170 | * unregister the apps and continue | |
1171 | */ | |
56fff090 | 1172 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1173 | } else { |
1174 | /* | |
1175 | * We just need here to monitor the close of the UST | |
1176 | * socket and poll set monitor those by default. | |
1177 | */ | |
1178 | ret = lttng_poll_add(&events, ust_cmd.sock, 0); | |
1179 | if (ret < 0) { | |
1180 | goto error; | |
1181 | } | |
1182 | ||
54d01ffb DG |
1183 | DBG("Apps with sock %d added to poll set", |
1184 | ust_cmd.sock); | |
5eb91c98 | 1185 | } |
487cf67c | 1186 | |
5eb91c98 | 1187 | break; |
0177d773 | 1188 | } |
5eb91c98 DG |
1189 | } else { |
1190 | /* | |
54d01ffb DG |
1191 | * At this point, we know that a registered application made |
1192 | * the event at poll_wait. | |
5eb91c98 DG |
1193 | */ |
1194 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1195 | /* Removing from the poll set */ | |
1196 | ret = lttng_poll_del(&events, pollfd); | |
1197 | if (ret < 0) { | |
1198 | goto error; | |
1199 | } | |
099e26bd | 1200 | |
b9d9b220 | 1201 | /* Socket closed on remote end. */ |
56fff090 | 1202 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1203 | break; |
1204 | } | |
099e26bd DG |
1205 | } |
1206 | } | |
099e26bd DG |
1207 | } |
1208 | ||
1209 | error: | |
1210 | DBG("Application communication apps dying"); | |
1211 | close(apps_cmd_pipe[0]); | |
1212 | close(apps_cmd_pipe[1]); | |
1213 | ||
5eb91c98 | 1214 | lttng_poll_clean(&events); |
099e26bd | 1215 | |
f6a9efaa DG |
1216 | rcu_thread_offline(); |
1217 | rcu_unregister_thread(); | |
099e26bd DG |
1218 | return NULL; |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * Dispatch request from the registration threads to the application | |
1223 | * communication thread. | |
1224 | */ | |
1225 | static void *thread_dispatch_ust_registration(void *data) | |
1226 | { | |
1227 | int ret; | |
1228 | struct cds_wfq_node *node; | |
1229 | struct ust_command *ust_cmd = NULL; | |
1230 | ||
1231 | DBG("[thread] Dispatch UST command started"); | |
1232 | ||
1233 | while (!dispatch_thread_exit) { | |
1234 | /* Atomically prepare the queue futex */ | |
1235 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1236 | ||
1237 | do { | |
1238 | /* Dequeue command for registration */ | |
1239 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1240 | if (node == NULL) { | |
00a17c97 | 1241 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1242 | /* Continue thread execution */ |
1243 | break; | |
1244 | } | |
1245 | ||
1246 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1247 | ||
2f50c8a3 DG |
1248 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1249 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1250 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1251 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1252 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1253 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1254 | /* |
1255 | * Inform apps thread of the new application registration. This | |
1256 | * call is blocking so we can be assured that the data will be read | |
1257 | * at some point in time or wait to the end of the world :) | |
1258 | */ | |
1259 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1260 | sizeof(struct ust_command)); | |
1261 | if (ret < 0) { | |
1262 | perror("write apps cmd pipe"); | |
1263 | if (errno == EBADF) { | |
1264 | /* | |
1265 | * We can't inform the application thread to process | |
1266 | * registration. We will exit or else application | |
1267 | * registration will not occur and tracing will never | |
1268 | * start. | |
1269 | */ | |
1270 | goto error; | |
1271 | } | |
1272 | } | |
1273 | free(ust_cmd); | |
1274 | } while (node != NULL); | |
1275 | ||
1276 | /* Futex wait on queue. Blocking call on futex() */ | |
1277 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1278 | } | |
1279 | ||
1280 | error: | |
1281 | DBG("Dispatch thread dying"); | |
1282 | return NULL; | |
1283 | } | |
1284 | ||
1285 | /* | |
1286 | * This thread manage application registration. | |
1287 | */ | |
1288 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1289 | { |
5eb91c98 DG |
1290 | int sock = 0, i, ret, pollfd; |
1291 | uint32_t revents, nb_fd; | |
1292 | struct lttng_poll_event events; | |
099e26bd DG |
1293 | /* |
1294 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1295 | * freed in the manage apps thread. | |
1296 | */ | |
1297 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1298 | |
099e26bd | 1299 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1300 | |
1301 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1302 | if (ret < 0) { | |
1303 | goto error; | |
1304 | } | |
1305 | ||
5eb91c98 DG |
1306 | /* |
1307 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1308 | * more will be added to this poll set. | |
1309 | */ | |
1310 | ret = create_thread_poll_set(&events, 2); | |
1311 | if (ret < 0) { | |
1312 | goto error; | |
1313 | } | |
273ea72c | 1314 | |
5eb91c98 DG |
1315 | /* Add the application registration socket */ |
1316 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1317 | if (ret < 0) { | |
1318 | goto error; | |
1319 | } | |
273ea72c | 1320 | |
1d4b027a | 1321 | /* Notify all applications to register */ |
0fdd1e2c DG |
1322 | ret = notify_ust_apps(1); |
1323 | if (ret < 0) { | |
1324 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1325 | "Execution continues but there might be problem for already\n" |
1326 | "running applications that wishes to register."); | |
0fdd1e2c | 1327 | } |
1d4b027a DG |
1328 | |
1329 | while (1) { | |
1330 | DBG("Accepting application registration"); | |
273ea72c | 1331 | |
5eb91c98 DG |
1332 | nb_fd = LTTNG_POLL_GETNB(&events); |
1333 | ||
273ea72c | 1334 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1335 | restart: |
5eb91c98 | 1336 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1337 | if (ret < 0) { |
88f2b785 MD |
1338 | /* |
1339 | * Restart interrupted system call. | |
1340 | */ | |
1341 | if (errno == EINTR) { | |
1342 | goto restart; | |
1343 | } | |
273ea72c DG |
1344 | goto error; |
1345 | } | |
1346 | ||
5eb91c98 DG |
1347 | for (i = 0; i < nb_fd; i++) { |
1348 | /* Fetch once the poll data */ | |
1349 | revents = LTTNG_POLL_GETEV(&events, i); | |
1350 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1351 | |
5eb91c98 DG |
1352 | /* Thread quit pipe has been closed. Killing thread. */ |
1353 | ret = check_thread_quit_pipe(pollfd, revents); | |
1354 | if (ret) { | |
90014c57 DG |
1355 | goto error; |
1356 | } | |
1d4b027a | 1357 | |
5eb91c98 DG |
1358 | /* Event on the registration socket */ |
1359 | if (pollfd == apps_sock) { | |
1360 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1361 | ERR("Register apps socket poll error"); | |
1362 | goto error; | |
1363 | } else if (revents & LPOLLIN) { | |
1364 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1365 | if (sock < 0) { | |
1366 | goto error; | |
1367 | } | |
099e26bd | 1368 | |
5eb91c98 | 1369 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1370 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1371 | if (ust_cmd == NULL) { |
ba7f0ae5 | 1372 | perror("ust command zmalloc"); |
5eb91c98 DG |
1373 | goto error; |
1374 | } | |
1d4b027a | 1375 | |
5eb91c98 DG |
1376 | /* |
1377 | * Using message-based transmissions to ensure we don't | |
1378 | * have to deal with partially received messages. | |
1379 | */ | |
1380 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, | |
1381 | sizeof(struct ust_register_msg)); | |
1382 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1383 | if (ret < 0) { | |
1384 | perror("lttcomm_recv_unix_sock register apps"); | |
1385 | } else { | |
1386 | ERR("Wrong size received on apps register"); | |
1387 | } | |
1388 | free(ust_cmd); | |
1389 | close(sock); | |
1390 | continue; | |
1391 | } | |
099e26bd | 1392 | |
5eb91c98 | 1393 | ust_cmd->sock = sock; |
099e26bd | 1394 | |
5eb91c98 DG |
1395 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1396 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1397 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1398 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1399 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1400 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1401 | |
5eb91c98 DG |
1402 | /* |
1403 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1404 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1405 | */ |
1406 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1407 | ||
1408 | /* | |
1409 | * Wake the registration queue futex. Implicit memory | |
1410 | * barrier with the exchange in cds_wfq_enqueue. | |
1411 | */ | |
1412 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1413 | } | |
1414 | } | |
90014c57 | 1415 | } |
1d4b027a DG |
1416 | } |
1417 | ||
1418 | error: | |
0fdd1e2c DG |
1419 | DBG("UST Registration thread dying"); |
1420 | ||
1421 | /* Notify that the registration thread is gone */ | |
1422 | notify_ust_apps(0); | |
1423 | ||
1424 | close(apps_sock); | |
1425 | close(sock); | |
273ea72c | 1426 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1427 | |
5eb91c98 DG |
1428 | lttng_poll_clean(&events); |
1429 | ||
1d4b027a DG |
1430 | return NULL; |
1431 | } | |
1432 | ||
8c0faa1d | 1433 | /* |
3bd1e081 | 1434 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1435 | * exec or it will fails. |
8c0faa1d | 1436 | */ |
3bd1e081 | 1437 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1438 | { |
1439 | int ret; | |
ee0b0061 DG |
1440 | struct timespec timeout; |
1441 | ||
1442 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1443 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1444 | |
1445 | /* Setup semaphore */ | |
3bd1e081 | 1446 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1447 | if (ret < 0) { |
3bd1e081 | 1448 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1449 | goto error; |
1450 | } | |
8c0faa1d | 1451 | |
3bd1e081 MD |
1452 | ret = pthread_create(&consumer_data->thread, NULL, |
1453 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1454 | if (ret != 0) { |
3bd1e081 | 1455 | PERROR("pthread_create consumer"); |
ee0b0061 | 1456 | ret = -1; |
8c0faa1d DG |
1457 | goto error; |
1458 | } | |
1459 | ||
ee0b0061 DG |
1460 | /* Get time for sem_timedwait absolute timeout */ |
1461 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1462 | if (ret < 0) { | |
3bd1e081 | 1463 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1464 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1465 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1466 | } else { |
1467 | /* Normal timeout if the gettime was successful */ | |
1468 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1469 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1470 | } |
8c0faa1d | 1471 | |
ee0b0061 DG |
1472 | if (ret < 0) { |
1473 | if (errno == ETIMEDOUT) { | |
1474 | /* | |
1475 | * Call has timed out so we kill the kconsumerd_thread and return | |
1476 | * an error. | |
1477 | */ | |
3bd1e081 MD |
1478 | ERR("The consumer thread was never ready. Killing it"); |
1479 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1480 | if (ret < 0) { |
3bd1e081 | 1481 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1482 | } |
1483 | } else { | |
3bd1e081 | 1484 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1485 | } |
1486 | goto error; | |
1487 | } | |
1488 | ||
3bd1e081 MD |
1489 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1490 | if (consumer_data->pid == 0) { | |
712ea556 | 1491 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1492 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1493 | goto error; |
1494 | } | |
3bd1e081 | 1495 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1496 | |
8c0faa1d DG |
1497 | return 0; |
1498 | ||
1499 | error: | |
1500 | return ret; | |
1501 | } | |
1502 | ||
d9800920 | 1503 | /* |
3bd1e081 | 1504 | * Join consumer thread |
d9800920 | 1505 | */ |
3bd1e081 | 1506 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1507 | { |
1508 | void *status; | |
1509 | int ret; | |
1510 | ||
3bd1e081 MD |
1511 | if (consumer_data->pid != 0) { |
1512 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1513 | if (ret) { |
3bd1e081 | 1514 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1515 | return ret; |
1516 | } | |
3bd1e081 | 1517 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1518 | } else { |
1519 | return 0; | |
1520 | } | |
1521 | } | |
1522 | ||
8c0faa1d | 1523 | /* |
3bd1e081 | 1524 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1525 | * |
d063d709 | 1526 | * Return pid if successful else -1. |
8c0faa1d | 1527 | */ |
3bd1e081 | 1528 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1529 | { |
1530 | int ret; | |
1531 | pid_t pid; | |
94c55f17 | 1532 | const char *consumer_to_use; |
53086306 | 1533 | const char *verbosity; |
94c55f17 | 1534 | struct stat st; |
8c0faa1d | 1535 | |
3bd1e081 | 1536 | DBG("Spawning consumerd"); |
c49dc785 | 1537 | |
8c0faa1d DG |
1538 | pid = fork(); |
1539 | if (pid == 0) { | |
1540 | /* | |
3bd1e081 | 1541 | * Exec consumerd. |
8c0faa1d | 1542 | */ |
daee5345 | 1543 | if (opt_verbose_consumer) { |
53086306 DG |
1544 | verbosity = "--verbose"; |
1545 | } else { | |
1546 | verbosity = "--quiet"; | |
1547 | } | |
3bd1e081 MD |
1548 | switch (consumer_data->type) { |
1549 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1550 | /* |
c7704d57 DG |
1551 | * Find out which consumerd to execute. We will first try the |
1552 | * 64-bit path, then the sessiond's installation directory, and | |
1553 | * fallback on the 32-bit one, | |
94c55f17 | 1554 | */ |
63a799e8 AM |
1555 | DBG3("Looking for a kernel consumer at these locations:"); |
1556 | DBG3(" 1) %s", consumerd64_bin); | |
1557 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1558 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1559 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1560 | DBG3("Found location #1"); |
94c55f17 | 1561 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1562 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1563 | DBG3("Found location #2"); |
94c55f17 | 1564 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1565 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1566 | DBG3("Found location #3"); |
eb1e0bd4 | 1567 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1568 | } else { |
63a799e8 | 1569 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1570 | break; |
1571 | } | |
1572 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1573 | execl(consumer_to_use, | |
1574 | "lttng-consumerd", verbosity, "-k", | |
1575 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1576 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1577 | NULL); | |
3bd1e081 | 1578 | break; |
7753dea8 MD |
1579 | case LTTNG_CONSUMER64_UST: |
1580 | { | |
b1e0b6b6 | 1581 | char *tmpnew = NULL; |
8f4905da MD |
1582 | |
1583 | if (consumerd64_libdir[0] != '\0') { | |
1584 | char *tmp; | |
1585 | size_t tmplen; | |
1586 | ||
1587 | tmp = getenv("LD_LIBRARY_PATH"); | |
1588 | if (!tmp) { | |
1589 | tmp = ""; | |
1590 | } | |
1591 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1592 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1593 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1594 | if (!tmpnew) { | |
1595 | ret = -ENOMEM; | |
1596 | goto error; | |
1597 | } | |
1598 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1599 | strcat(tmpnew, consumerd64_libdir); | |
1600 | if (tmp[0] != '\0') { | |
1601 | strcat(tmpnew, ":"); | |
1602 | strcat(tmpnew, tmp); | |
1603 | } | |
1604 | ret = putenv(tmpnew); | |
1605 | if (ret) { | |
1606 | ret = -errno; | |
1607 | goto error; | |
1608 | } | |
1609 | } | |
94c55f17 | 1610 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1611 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1612 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1613 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1614 | NULL); | |
8f4905da MD |
1615 | if (consumerd64_libdir[0] != '\0') { |
1616 | free(tmpnew); | |
1617 | } | |
1618 | if (ret) { | |
1619 | goto error; | |
1620 | } | |
3bd1e081 | 1621 | break; |
7753dea8 MD |
1622 | } |
1623 | case LTTNG_CONSUMER32_UST: | |
1624 | { | |
937dde8e | 1625 | char *tmpnew = NULL; |
8f4905da MD |
1626 | |
1627 | if (consumerd32_libdir[0] != '\0') { | |
1628 | char *tmp; | |
1629 | size_t tmplen; | |
1630 | ||
1631 | tmp = getenv("LD_LIBRARY_PATH"); | |
1632 | if (!tmp) { | |
1633 | tmp = ""; | |
1634 | } | |
1635 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1636 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1637 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1638 | if (!tmpnew) { | |
1639 | ret = -ENOMEM; | |
1640 | goto error; | |
1641 | } | |
1642 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1643 | strcat(tmpnew, consumerd32_libdir); | |
1644 | if (tmp[0] != '\0') { | |
1645 | strcat(tmpnew, ":"); | |
1646 | strcat(tmpnew, tmp); | |
1647 | } | |
1648 | ret = putenv(tmpnew); | |
1649 | if (ret) { | |
1650 | ret = -errno; | |
1651 | goto error; | |
1652 | } | |
1653 | } | |
94c55f17 | 1654 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1655 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1656 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1657 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1658 | NULL); | |
8f4905da MD |
1659 | if (consumerd32_libdir[0] != '\0') { |
1660 | free(tmpnew); | |
1661 | } | |
1662 | if (ret) { | |
1663 | goto error; | |
1664 | } | |
7753dea8 MD |
1665 | break; |
1666 | } | |
3bd1e081 MD |
1667 | default: |
1668 | perror("unknown consumer type"); | |
1669 | exit(EXIT_FAILURE); | |
1670 | } | |
8c0faa1d DG |
1671 | if (errno != 0) { |
1672 | perror("kernel start consumer exec"); | |
1673 | } | |
1674 | exit(EXIT_FAILURE); | |
1675 | } else if (pid > 0) { | |
1676 | ret = pid; | |
8c0faa1d | 1677 | } else { |
3bd1e081 | 1678 | perror("start consumer fork"); |
8c0faa1d | 1679 | ret = -errno; |
8c0faa1d | 1680 | } |
8f4905da | 1681 | error: |
8c0faa1d DG |
1682 | return ret; |
1683 | } | |
1684 | ||
693bd40b | 1685 | /* |
3bd1e081 | 1686 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1687 | */ |
3bd1e081 | 1688 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1689 | { |
1690 | int ret; | |
1691 | ||
3bd1e081 MD |
1692 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1693 | if (consumer_data->pid != 0) { | |
1694 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1695 | goto end; |
1696 | } | |
693bd40b | 1697 | |
3bd1e081 | 1698 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1699 | if (ret < 0) { |
3bd1e081 MD |
1700 | ERR("Spawning consumerd failed"); |
1701 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1702 | goto error; |
693bd40b | 1703 | } |
c49dc785 | 1704 | |
3bd1e081 MD |
1705 | /* Setting up the consumer_data pid */ |
1706 | consumer_data->pid = ret; | |
48842b30 | 1707 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1708 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1709 | |
3bd1e081 MD |
1710 | DBG2("Spawning consumer control thread"); |
1711 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1712 | if (ret < 0) { |
3bd1e081 | 1713 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1714 | goto error; |
1715 | } | |
1716 | ||
c49dc785 | 1717 | end: |
693bd40b DG |
1718 | return 0; |
1719 | ||
1720 | error: | |
1721 | return ret; | |
1722 | } | |
1723 | ||
b73401da | 1724 | /* |
096102bd | 1725 | * Check version of the lttng-modules. |
b73401da | 1726 | */ |
096102bd | 1727 | static int validate_lttng_modules_version(void) |
b73401da | 1728 | { |
096102bd | 1729 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1730 | } |
1731 | ||
b73401da | 1732 | /* |
096102bd | 1733 | * Setup necessary data for kernel tracer action. |
b73401da | 1734 | */ |
096102bd | 1735 | static int init_kernel_tracer(void) |
b73401da DG |
1736 | { |
1737 | int ret; | |
b73401da | 1738 | |
096102bd DG |
1739 | /* Modprobe lttng kernel modules */ |
1740 | ret = modprobe_lttng_control(); | |
b73401da | 1741 | if (ret < 0) { |
b73401da DG |
1742 | goto error; |
1743 | } | |
1744 | ||
096102bd DG |
1745 | /* Open debugfs lttng */ |
1746 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1747 | if (kernel_tracer_fd < 0) { | |
1748 | DBG("Failed to open %s", module_proc_lttng); | |
1749 | ret = -1; | |
1750 | goto error_open; | |
b73401da DG |
1751 | } |
1752 | ||
096102bd DG |
1753 | /* Validate kernel version */ |
1754 | ret = validate_lttng_modules_version(); | |
b73401da | 1755 | if (ret < 0) { |
096102bd | 1756 | goto error_version; |
b73401da DG |
1757 | } |
1758 | ||
096102bd | 1759 | ret = modprobe_lttng_data(); |
b73401da | 1760 | if (ret < 0) { |
096102bd | 1761 | goto error_modules; |
8c0faa1d DG |
1762 | } |
1763 | ||
f3ed775e | 1764 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1765 | return 0; |
1766 | ||
1767 | error_version: | |
1768 | modprobe_remove_lttng_control(); | |
1769 | close(kernel_tracer_fd); | |
1770 | kernel_tracer_fd = 0; | |
1771 | return LTTCOMM_KERN_VERSION; | |
1772 | ||
1773 | error_modules: | |
1774 | close(kernel_tracer_fd); | |
1775 | ||
1776 | error_open: | |
1777 | modprobe_remove_lttng_control(); | |
b73401da DG |
1778 | |
1779 | error: | |
b73401da DG |
1780 | WARN("No kernel tracer available"); |
1781 | kernel_tracer_fd = 0; | |
096102bd | 1782 | return LTTCOMM_KERN_NA; |
f3ed775e | 1783 | } |
33a2b854 | 1784 | |
f3ed775e | 1785 | /* |
54d01ffb | 1786 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1787 | */ |
54d01ffb | 1788 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1789 | { |
f40799e8 | 1790 | int ret = 0; |
8c0faa1d | 1791 | |
3bd1e081 | 1792 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1793 | /* |
54d01ffb DG |
1794 | * Assign default kernel consumer socket if no consumer assigned to the |
1795 | * kernel session. At this point, it's NOT suppose to be 0 but this is | |
1796 | * an extra security check. | |
d9800920 DG |
1797 | */ |
1798 | if (session->consumer_fd == 0) { | |
3bd1e081 | 1799 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1800 | } |
1801 | ||
2bdd86d4 | 1802 | ret = send_kconsumer_session_streams(&kconsumer_data, session); |
f3ed775e | 1803 | if (ret < 0) { |
f3ed775e DG |
1804 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1805 | goto error; | |
1806 | } | |
1d4b027a | 1807 | |
3bd1e081 | 1808 | session->consumer_fds_sent = 1; |
f3ed775e | 1809 | } |
1d4b027a DG |
1810 | |
1811 | error: | |
1812 | return ret; | |
8c0faa1d DG |
1813 | } |
1814 | ||
0177d773 DG |
1815 | /* |
1816 | * Create an UST session and add it to the session ust list. | |
1817 | */ | |
44d3bd01 | 1818 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1819 | struct lttng_domain *domain) |
0177d773 | 1820 | { |
13384287 | 1821 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1822 | int ret; |
44d3bd01 DG |
1823 | |
1824 | switch (domain->type) { | |
48842b30 | 1825 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1826 | break; |
1827 | default: | |
13384287 | 1828 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1829 | goto error; |
1830 | } | |
0177d773 DG |
1831 | |
1832 | DBG("Creating UST session"); | |
1833 | ||
a991f516 | 1834 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1835 | if (lus == NULL) { |
44d3bd01 | 1836 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1837 | goto error; |
1838 | } | |
1839 | ||
e11d277b | 1840 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1841 | session->uid, session->gid); |
0177d773 DG |
1842 | if (ret < 0) { |
1843 | if (ret != -EEXIST) { | |
1844 | ERR("Trace directory creation error"); | |
44d3bd01 | 1845 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1846 | goto error; |
1847 | } | |
1848 | } | |
1849 | ||
f6a9efaa DG |
1850 | /* The domain type dictate different actions on session creation */ |
1851 | switch (domain->type) { | |
48842b30 DG |
1852 | case LTTNG_DOMAIN_UST: |
1853 | /* No ustctl for the global UST domain */ | |
1854 | break; | |
1855 | default: | |
36dc12cc | 1856 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1857 | goto error; |
0177d773 | 1858 | } |
6df2e2c9 MD |
1859 | lus->uid = session->uid; |
1860 | lus->gid = session->gid; | |
f6a9efaa | 1861 | session->ust_session = lus; |
44d3bd01 DG |
1862 | |
1863 | return LTTCOMM_OK; | |
0177d773 DG |
1864 | |
1865 | error: | |
1866 | free(lus); | |
1867 | return ret; | |
1868 | } | |
1869 | ||
333f285e | 1870 | /* |
d063d709 | 1871 | * Create a kernel tracer session then create the default channel. |
333f285e | 1872 | */ |
6df2e2c9 | 1873 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1874 | { |
f3ed775e | 1875 | int ret; |
f3ed775e DG |
1876 | |
1877 | DBG("Creating kernel session"); | |
1878 | ||
1879 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1880 | if (ret < 0) { | |
1881 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1882 | goto error; | |
333f285e DG |
1883 | } |
1884 | ||
d9800920 | 1885 | /* Set kernel consumer socket fd */ |
3bd1e081 MD |
1886 | if (kconsumer_data.cmd_sock) { |
1887 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; | |
d9800920 DG |
1888 | } |
1889 | ||
e11d277b | 1890 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1891 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1892 | if (ret < 0) { |
996b65c8 | 1893 | if (ret != -EEXIST) { |
7a485870 DG |
1894 | ERR("Trace directory creation error"); |
1895 | goto error; | |
1896 | } | |
1897 | } | |
6df2e2c9 MD |
1898 | session->kernel_session->uid = session->uid; |
1899 | session->kernel_session->gid = session->gid; | |
7a485870 | 1900 | |
f3ed775e DG |
1901 | error: |
1902 | return ret; | |
333f285e DG |
1903 | } |
1904 | ||
8e0af1b4 | 1905 | /* |
c7704d57 DG |
1906 | * Check if the UID or GID match the session. Root user has access to all |
1907 | * sessions. | |
8e0af1b4 | 1908 | */ |
c7704d57 | 1909 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1910 | { |
c7704d57 | 1911 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1912 | return 0; |
1913 | } else { | |
1914 | return 1; | |
1915 | } | |
1916 | } | |
1917 | ||
1918 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1919 | { | |
1920 | unsigned int i = 0; | |
1921 | struct ltt_session *session; | |
1922 | ||
1923 | DBG("Counting number of available session for UID %d GID %d", | |
1924 | uid, gid); | |
1925 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1926 | /* | |
1927 | * Only list the sessions the user can control. | |
1928 | */ | |
1929 | if (!session_access_ok(session, uid, gid)) { | |
1930 | continue; | |
1931 | } | |
1932 | i++; | |
1933 | } | |
1934 | return i; | |
1935 | } | |
1936 | ||
6c9cc2ab DG |
1937 | /* |
1938 | * Using the session list, filled a lttng_session array to send back to the | |
1939 | * client for session listing. | |
1940 | * | |
1941 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1942 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 1943 | */ |
c7704d57 DG |
1944 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
1945 | gid_t gid) | |
6c9cc2ab | 1946 | { |
8e0af1b4 | 1947 | unsigned int i = 0; |
6c9cc2ab DG |
1948 | struct ltt_session *session; |
1949 | ||
8e0af1b4 MD |
1950 | DBG("Getting all available session for UID %d GID %d", |
1951 | uid, gid); | |
6c9cc2ab DG |
1952 | /* |
1953 | * Iterate over session list and append data after the control struct in | |
1954 | * the buffer. | |
1955 | */ | |
1956 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
1957 | /* |
1958 | * Only list the sessions the user can control. | |
1959 | */ | |
1960 | if (!session_access_ok(session, uid, gid)) { | |
1961 | continue; | |
1962 | } | |
6c9cc2ab | 1963 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 1964 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1965 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1966 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 1967 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
1968 | i++; |
1969 | } | |
1970 | } | |
1971 | ||
9f19cc17 DG |
1972 | /* |
1973 | * Fill lttng_channel array of all channels. | |
1974 | */ | |
b551a063 | 1975 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
1976 | struct lttng_channel *channels) |
1977 | { | |
1978 | int i = 0; | |
1979 | struct ltt_kernel_channel *kchan; | |
1980 | ||
1981 | DBG("Listing channels for session %s", session->name); | |
1982 | ||
b551a063 DG |
1983 | switch (domain) { |
1984 | case LTTNG_DOMAIN_KERNEL: | |
1985 | /* Kernel channels */ | |
1986 | if (session->kernel_session != NULL) { | |
1987 | cds_list_for_each_entry(kchan, | |
1988 | &session->kernel_session->channel_list.head, list) { | |
1989 | /* Copy lttng_channel struct to array */ | |
1990 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1991 | channels[i].enabled = kchan->enabled; | |
1992 | i++; | |
1993 | } | |
1994 | } | |
1995 | break; | |
1996 | case LTTNG_DOMAIN_UST: | |
1997 | { | |
bec39940 | 1998 | struct lttng_ht_iter iter; |
b551a063 DG |
1999 | struct ltt_ust_channel *uchan; |
2000 | ||
bec39940 DG |
2001 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
2002 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
2003 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
2004 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
2005 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
2006 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
2007 | channels[i].attr.switch_timer_interval = | |
2008 | uchan->attr.switch_timer_interval; | |
2009 | channels[i].attr.read_timer_interval = | |
2010 | uchan->attr.read_timer_interval; | |
aea829b3 | 2011 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
2012 | switch (uchan->attr.output) { |
2013 | case LTTNG_UST_MMAP: | |
2014 | default: | |
2015 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
2016 | break; | |
2017 | } | |
befe0905 | 2018 | i++; |
b551a063 DG |
2019 | } |
2020 | break; | |
2021 | } | |
2022 | default: | |
2023 | break; | |
2024 | } | |
2025 | } | |
2026 | ||
2027 | /* | |
2028 | * Create a list of ust global domain events. | |
2029 | */ | |
2030 | static int list_lttng_ust_global_events(char *channel_name, | |
2031 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
2032 | { | |
2033 | int i = 0, ret = 0; | |
2034 | unsigned int nb_event = 0; | |
bec39940 DG |
2035 | struct lttng_ht_iter iter; |
2036 | struct lttng_ht_node_str *node; | |
b551a063 DG |
2037 | struct ltt_ust_channel *uchan; |
2038 | struct ltt_ust_event *uevent; | |
2039 | struct lttng_event *tmp; | |
2040 | ||
2041 | DBG("Listing UST global events for channel %s", channel_name); | |
2042 | ||
2043 | rcu_read_lock(); | |
2044 | ||
bec39940 DG |
2045 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2046 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2047 | if (node == NULL) { |
2048 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2049 | goto error; | |
b551a063 DG |
2050 | } |
2051 | ||
bec39940 | 2052 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2053 | |
bec39940 | 2054 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2055 | |
b551a063 DG |
2056 | if (nb_event == 0) { |
2057 | ret = nb_event; | |
2058 | goto error; | |
2059 | } | |
2060 | ||
2061 | DBG3("Listing UST global %d events", nb_event); | |
2062 | ||
2063 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2064 | if (tmp == NULL) { | |
2065 | ret = -LTTCOMM_FATAL; | |
2066 | goto error; | |
2067 | } | |
2068 | ||
bec39940 | 2069 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2070 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2071 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2072 | tmp[i].enabled = uevent->enabled; | |
2073 | switch (uevent->attr.instrumentation) { | |
2074 | case LTTNG_UST_TRACEPOINT: | |
2075 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2076 | break; | |
2077 | case LTTNG_UST_PROBE: | |
2078 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2079 | break; | |
2080 | case LTTNG_UST_FUNCTION: | |
2081 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2082 | break; | |
0cda4f28 | 2083 | } |
8005f29a | 2084 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2085 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2086 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2087 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2088 | break; |
8005f29a | 2089 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2090 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2091 | break; |
2092 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2093 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2094 | break; |
9f19cc17 | 2095 | } |
d7b75b30 | 2096 | i++; |
9f19cc17 DG |
2097 | } |
2098 | ||
b551a063 DG |
2099 | ret = nb_event; |
2100 | *events = tmp; | |
2101 | ||
2102 | error: | |
2103 | rcu_read_unlock(); | |
2104 | return ret; | |
9f19cc17 DG |
2105 | } |
2106 | ||
2107 | /* | |
b551a063 | 2108 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2109 | */ |
b551a063 DG |
2110 | static int list_lttng_kernel_events(char *channel_name, |
2111 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2112 | { |
b551a063 DG |
2113 | int i = 0, ret; |
2114 | unsigned int nb_event; | |
9f19cc17 | 2115 | struct ltt_kernel_event *event; |
b551a063 DG |
2116 | struct ltt_kernel_channel *kchan; |
2117 | ||
2118 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2119 | if (kchan == NULL) { | |
2120 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2121 | goto error; | |
2122 | } | |
2123 | ||
2124 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2125 | |
2126 | DBG("Listing events for channel %s", kchan->channel->name); | |
2127 | ||
b551a063 DG |
2128 | if (nb_event == 0) { |
2129 | ret = nb_event; | |
2130 | goto error; | |
2131 | } | |
2132 | ||
2133 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2134 | if (*events == NULL) { | |
2135 | ret = LTTCOMM_FATAL; | |
2136 | goto error; | |
2137 | } | |
2138 | ||
9f19cc17 DG |
2139 | /* Kernel channels */ |
2140 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2141 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2142 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2143 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2144 | switch (event->event->instrumentation) { |
2145 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2146 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2147 | break; |
2148 | case LTTNG_KERNEL_KPROBE: | |
2149 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2150 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2151 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2152 | sizeof(struct lttng_kernel_kprobe)); |
2153 | break; | |
2154 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2155 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2156 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2157 | sizeof(struct lttng_kernel_function)); |
2158 | break; | |
0133c199 | 2159 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2160 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2161 | break; |
a54bd42d | 2162 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2163 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2164 | break; |
7a3d1328 MD |
2165 | case LTTNG_KERNEL_ALL: |
2166 | assert(0); | |
2167 | break; | |
9f19cc17 DG |
2168 | } |
2169 | i++; | |
2170 | } | |
b551a063 DG |
2171 | |
2172 | return nb_event; | |
2173 | ||
2174 | error: | |
2175 | return ret; | |
9f19cc17 DG |
2176 | } |
2177 | ||
fac6795d | 2178 | /* |
54d01ffb | 2179 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2180 | */ |
54d01ffb DG |
2181 | static int cmd_disable_channel(struct ltt_session *session, |
2182 | int domain, char *channel_name) | |
fac6795d | 2183 | { |
54d01ffb | 2184 | int ret; |
78f0bacd DG |
2185 | struct ltt_ust_session *usess; |
2186 | ||
2187 | usess = session->ust_session; | |
379473d2 | 2188 | |
54d01ffb | 2189 | switch (domain) { |
78f0bacd DG |
2190 | case LTTNG_DOMAIN_KERNEL: |
2191 | { | |
2192 | ret = channel_kernel_disable(session->kernel_session, | |
2193 | channel_name); | |
2194 | if (ret != LTTCOMM_OK) { | |
2195 | goto error; | |
2196 | } | |
54d01ffb | 2197 | |
78f0bacd DG |
2198 | kernel_wait_quiescent(kernel_tracer_fd); |
2199 | break; | |
2200 | } | |
2201 | case LTTNG_DOMAIN_UST: | |
2202 | { | |
2203 | struct ltt_ust_channel *uchan; | |
bec39940 | 2204 | struct lttng_ht *chan_ht; |
78f0bacd | 2205 | |
7885e399 DG |
2206 | chan_ht = usess->domain_global.channels; |
2207 | ||
2208 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2209 | if (uchan == NULL) { |
2210 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2211 | goto error; |
78f0bacd DG |
2212 | } |
2213 | ||
7885e399 DG |
2214 | ret = channel_ust_disable(usess, domain, uchan); |
2215 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2216 | goto error; |
2217 | } | |
78f0bacd DG |
2218 | break; |
2219 | } | |
d78d6610 | 2220 | #if 0 |
78f0bacd DG |
2221 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2222 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2223 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2224 | #endif |
78f0bacd DG |
2225 | default: |
2226 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2227 | goto error; | |
20fe2104 DG |
2228 | } |
2229 | ||
54d01ffb | 2230 | ret = LTTCOMM_OK; |
d65106b1 | 2231 | |
54d01ffb DG |
2232 | error: |
2233 | return ret; | |
2234 | } | |
2235 | ||
2236 | /* | |
2237 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2238 | */ | |
44d3bd01 | 2239 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2240 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2241 | { |
2242 | int ret; | |
f6a9efaa | 2243 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2244 | struct lttng_ht *chan_ht; |
f6a9efaa | 2245 | |
5d56b5aa | 2246 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2247 | |
aea829b3 | 2248 | switch (domain) { |
44d3bd01 DG |
2249 | case LTTNG_DOMAIN_KERNEL: |
2250 | { | |
2251 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2252 | |
44d3bd01 DG |
2253 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2254 | session->kernel_session); | |
2255 | if (kchan == NULL) { | |
2256 | ret = channel_kernel_create(session->kernel_session, | |
2257 | attr, kernel_poll_pipe[1]); | |
2258 | } else { | |
2259 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2260 | } | |
2261 | ||
2262 | if (ret != LTTCOMM_OK) { | |
2263 | goto error; | |
2264 | } | |
2265 | ||
2266 | kernel_wait_quiescent(kernel_tracer_fd); | |
2267 | break; | |
2268 | } | |
f6a9efaa DG |
2269 | case LTTNG_DOMAIN_UST: |
2270 | { | |
2271 | struct ltt_ust_channel *uchan; | |
2272 | ||
7885e399 | 2273 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2274 | |
7885e399 | 2275 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2276 | if (uchan == NULL) { |
7885e399 | 2277 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2278 | } else { |
7885e399 | 2279 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2280 | } |
f6a9efaa DG |
2281 | break; |
2282 | } | |
d78d6610 | 2283 | #if 0 |
78f0bacd DG |
2284 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2285 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2286 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2287 | #endif |
44d3bd01 DG |
2288 | default: |
2289 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2290 | goto error; | |
54d01ffb DG |
2291 | } |
2292 | ||
54d01ffb DG |
2293 | error: |
2294 | return ret; | |
2295 | } | |
2296 | ||
2297 | /* | |
2298 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2299 | */ | |
2300 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2301 | char *channel_name, char *event_name) | |
2302 | { | |
2303 | int ret; | |
54d01ffb DG |
2304 | |
2305 | switch (domain) { | |
2306 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2307 | { |
2308 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2309 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2310 | |
b0a40d28 DG |
2311 | ksess = session->kernel_session; |
2312 | ||
2313 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2314 | if (kchan == NULL) { |
2315 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2316 | goto error; | |
d65106b1 DG |
2317 | } |
2318 | ||
b0a40d28 | 2319 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2320 | if (ret != LTTCOMM_OK) { |
2321 | goto error; | |
2322 | } | |
2323 | ||
2324 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2325 | break; |
2bdd86d4 MD |
2326 | } |
2327 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2328 | { |
b0a40d28 | 2329 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2330 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2331 | |
2332 | usess = session->ust_session; | |
2333 | ||
2334 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2335 | channel_name); | |
2336 | if (uchan == NULL) { | |
2337 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2338 | goto error; | |
2339 | } | |
2340 | ||
7f79d3a1 DG |
2341 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2342 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2343 | goto error; |
2344 | } | |
2345 | ||
7f79d3a1 | 2346 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2347 | channel_name); |
b0a40d28 DG |
2348 | break; |
2349 | } | |
d78d6610 | 2350 | #if 0 |
2bdd86d4 MD |
2351 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2352 | case LTTNG_DOMAIN_UST_PID: | |
2353 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2354 | #endif |
54d01ffb | 2355 | default: |
1ab1ea0b | 2356 | ret = LTTCOMM_UND; |
54d01ffb | 2357 | goto error; |
d65106b1 | 2358 | } |
26cc6b4e | 2359 | |
54d01ffb DG |
2360 | ret = LTTCOMM_OK; |
2361 | ||
2362 | error: | |
2363 | return ret; | |
2364 | } | |
2365 | ||
2366 | /* | |
2367 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2368 | */ | |
2369 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2370 | char *channel_name) | |
2371 | { | |
2372 | int ret; | |
54d01ffb DG |
2373 | |
2374 | switch (domain) { | |
2375 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2376 | { |
2377 | struct ltt_kernel_session *ksess; | |
2378 | struct ltt_kernel_channel *kchan; | |
2379 | ||
2380 | ksess = session->kernel_session; | |
2381 | ||
2382 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2383 | if (kchan == NULL) { |
2384 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2385 | goto error; | |
26cc6b4e DG |
2386 | } |
2387 | ||
9730260e | 2388 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2389 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2390 | goto error; |
26cc6b4e DG |
2391 | } |
2392 | ||
54d01ffb | 2393 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2394 | break; |
9730260e DG |
2395 | } |
2396 | case LTTNG_DOMAIN_UST: | |
2397 | { | |
2398 | struct ltt_ust_session *usess; | |
2399 | struct ltt_ust_channel *uchan; | |
2400 | ||
2401 | usess = session->ust_session; | |
2402 | ||
2403 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2404 | channel_name); | |
2405 | if (uchan == NULL) { | |
2406 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2407 | goto error; | |
2408 | } | |
2409 | ||
7f79d3a1 DG |
2410 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2411 | if (ret != 0) { | |
9730260e DG |
2412 | goto error; |
2413 | } | |
2414 | ||
7f79d3a1 | 2415 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2416 | |
2417 | break; | |
2418 | } | |
d78d6610 | 2419 | #if 0 |
9730260e DG |
2420 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2421 | case LTTNG_DOMAIN_UST_PID: | |
2422 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2423 | #endif |
54d01ffb | 2424 | default: |
1ab1ea0b | 2425 | ret = LTTCOMM_UND; |
54d01ffb | 2426 | goto error; |
26cc6b4e | 2427 | } |
e953ef25 | 2428 | |
54d01ffb | 2429 | ret = LTTCOMM_OK; |
e953ef25 | 2430 | |
54d01ffb DG |
2431 | error: |
2432 | return ret; | |
2433 | } | |
f5177a38 | 2434 | |
54d01ffb DG |
2435 | /* |
2436 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2437 | */ | |
2438 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2439 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2440 | { | |
2441 | int ret; | |
f5177a38 | 2442 | |
54d01ffb DG |
2443 | switch (domain) { |
2444 | case LTTNG_DOMAIN_KERNEL: | |
2445 | /* Add kernel context to kernel tracer */ | |
2446 | ret = context_kernel_add(session->kernel_session, ctx, | |
2447 | event_name, channel_name); | |
2448 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2449 | goto error; |
e953ef25 | 2450 | } |
2bdd86d4 MD |
2451 | break; |
2452 | case LTTNG_DOMAIN_UST: | |
2453 | { | |
55cc08a6 | 2454 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2455 | |
55cc08a6 DG |
2456 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2457 | if (ret != LTTCOMM_OK) { | |
2458 | goto error; | |
2bdd86d4 | 2459 | } |
e953ef25 | 2460 | break; |
2bdd86d4 | 2461 | } |
d78d6610 | 2462 | #if 0 |
55cc08a6 DG |
2463 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2464 | case LTTNG_DOMAIN_UST_PID: | |
2465 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2466 | #endif |
54d01ffb | 2467 | default: |
1ab1ea0b | 2468 | ret = LTTCOMM_UND; |
54d01ffb | 2469 | goto error; |
e953ef25 | 2470 | } |
950131af | 2471 | |
54d01ffb | 2472 | ret = LTTCOMM_OK; |
950131af | 2473 | |
54d01ffb DG |
2474 | error: |
2475 | return ret; | |
2476 | } | |
2477 | ||
2478 | /* | |
2479 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2480 | */ | |
2481 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2482 | char *channel_name, struct lttng_event *event) | |
2483 | { | |
2484 | int ret; | |
f6cd6b0f | 2485 | struct lttng_channel *attr; |
48842b30 | 2486 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2487 | |
2488 | switch (domain) { | |
2489 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2490 | { |
2491 | struct ltt_kernel_channel *kchan; | |
2492 | ||
54d01ffb DG |
2493 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2494 | session->kernel_session); | |
2495 | if (kchan == NULL) { | |
f6cd6b0f DG |
2496 | attr = channel_new_default_attr(domain); |
2497 | if (attr == NULL) { | |
2498 | ret = LTTCOMM_FATAL; | |
2499 | goto error; | |
2500 | } | |
2501 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2502 | ||
54d01ffb | 2503 | /* This call will notify the kernel thread */ |
44d3bd01 | 2504 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2505 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2506 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2507 | free(attr); |
f5177a38 DG |
2508 | goto error; |
2509 | } | |
ff4d74e6 | 2510 | free(attr); |
54d01ffb | 2511 | } |
950131af | 2512 | |
54d01ffb DG |
2513 | /* Get the newly created kernel channel pointer */ |
2514 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2515 | session->kernel_session); | |
2516 | if (kchan == NULL) { | |
2517 | /* This sould not happen... */ | |
2518 | ret = LTTCOMM_FATAL; | |
2519 | goto error; | |
2520 | } | |
f5177a38 | 2521 | |
48842b30 DG |
2522 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2523 | event); | |
54d01ffb | 2524 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2525 | goto error; |
950131af DG |
2526 | } |
2527 | ||
54d01ffb | 2528 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2529 | break; |
2bdd86d4 MD |
2530 | } |
2531 | case LTTNG_DOMAIN_UST: | |
2532 | { | |
aea829b3 | 2533 | struct lttng_channel *attr; |
edb67388 | 2534 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2535 | |
edb67388 | 2536 | /* Get channel from global UST domain */ |
48842b30 DG |
2537 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2538 | channel_name); | |
2539 | if (uchan == NULL) { | |
aea829b3 DG |
2540 | /* Create default channel */ |
2541 | attr = channel_new_default_attr(domain); | |
2542 | if (attr == NULL) { | |
2543 | ret = LTTCOMM_FATAL; | |
2544 | goto error; | |
2545 | } | |
596219f7 | 2546 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2547 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2548 | |
7885e399 | 2549 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2550 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2551 | free(attr); |
aea829b3 DG |
2552 | goto error; |
2553 | } | |
aea829b3 DG |
2554 | free(attr); |
2555 | ||
2556 | /* Get the newly created channel reference back */ | |
2557 | uchan = trace_ust_find_channel_by_name( | |
2558 | usess->domain_global.channels, channel_name); | |
2559 | if (uchan == NULL) { | |
2560 | /* Something is really wrong */ | |
2561 | ret = LTTCOMM_FATAL; | |
2562 | goto error; | |
2563 | } | |
48842b30 | 2564 | } |
2bdd86d4 | 2565 | |
edb67388 | 2566 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2567 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2568 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2569 | goto error; |
2bdd86d4 MD |
2570 | } |
2571 | break; | |
2572 | } | |
d78d6610 | 2573 | #if 0 |
2bdd86d4 MD |
2574 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2575 | case LTTNG_DOMAIN_UST_PID: | |
2576 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2577 | #endif |
54d01ffb | 2578 | default: |
1ab1ea0b | 2579 | ret = LTTCOMM_UND; |
54d01ffb | 2580 | goto error; |
950131af | 2581 | } |
d36b8583 | 2582 | |
54d01ffb | 2583 | ret = LTTCOMM_OK; |
d36b8583 | 2584 | |
54d01ffb DG |
2585 | error: |
2586 | return ret; | |
2587 | } | |
7d29a247 | 2588 | |
54d01ffb DG |
2589 | /* |
2590 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2591 | */ | |
2592 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2593 | char *channel_name, int event_type) |
54d01ffb DG |
2594 | { |
2595 | int ret; | |
2596 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2597 | |
54d01ffb DG |
2598 | switch (domain) { |
2599 | case LTTNG_DOMAIN_KERNEL: | |
2600 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2601 | session->kernel_session); | |
2602 | if (kchan == NULL) { | |
2603 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2604 | ret = channel_kernel_create(session->kernel_session, NULL, |
2605 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2606 | if (ret != LTTCOMM_OK) { |
2607 | goto error; | |
d36b8583 | 2608 | } |
0d0c377a | 2609 | |
8f69e5eb DG |
2610 | /* Get the newly created kernel channel pointer */ |
2611 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2612 | session->kernel_session); | |
2613 | if (kchan == NULL) { | |
2614 | /* This sould not happen... */ | |
2615 | ret = LTTCOMM_FATAL; | |
2616 | goto error; | |
2617 | } | |
2618 | ||
54d01ffb | 2619 | } |
0fdd1e2c | 2620 | |
7a3d1328 | 2621 | switch (event_type) { |
76d45b40 | 2622 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2623 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2624 | kchan, kernel_tracer_fd); |
7a3d1328 | 2625 | break; |
76d45b40 | 2626 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2627 | /* |
7a3d1328 MD |
2628 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2629 | * events already registered to the channel. | |
8c9ae521 | 2630 | */ |
7a3d1328 MD |
2631 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2632 | kchan, kernel_tracer_fd); | |
2633 | break; | |
76d45b40 | 2634 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2635 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2636 | ret = event_kernel_enable_all(session->kernel_session, |
2637 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2638 | break; |
2639 | default: | |
2640 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2641 | goto error; | |
8c9ae521 | 2642 | } |
8f69e5eb DG |
2643 | |
2644 | /* Manage return value */ | |
54d01ffb | 2645 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2646 | goto error; |
d36b8583 DG |
2647 | } |
2648 | ||
54d01ffb | 2649 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2650 | break; |
76d45b40 DG |
2651 | case LTTNG_DOMAIN_UST: |
2652 | { | |
2653 | struct lttng_channel *attr; | |
2654 | struct ltt_ust_channel *uchan; | |
2655 | struct ltt_ust_session *usess = session->ust_session; | |
2656 | ||
2657 | /* Get channel from global UST domain */ | |
2658 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2659 | channel_name); | |
2660 | if (uchan == NULL) { | |
2661 | /* Create default channel */ | |
2662 | attr = channel_new_default_attr(domain); | |
2663 | if (attr == NULL) { | |
2664 | ret = LTTCOMM_FATAL; | |
2665 | goto error; | |
2666 | } | |
2667 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2668 | attr->name[NAME_MAX - 1] = '\0'; | |
2669 | ||
2670 | /* Use the internal command enable channel */ | |
7885e399 | 2671 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2672 | if (ret != LTTCOMM_OK) { |
2673 | free(attr); | |
2674 | goto error; | |
2675 | } | |
2676 | free(attr); | |
2677 | ||
2678 | /* Get the newly created channel reference back */ | |
2679 | uchan = trace_ust_find_channel_by_name( | |
2680 | usess->domain_global.channels, channel_name); | |
2681 | if (uchan == NULL) { | |
2682 | /* Something is really wrong */ | |
2683 | ret = LTTCOMM_FATAL; | |
2684 | goto error; | |
2685 | } | |
2686 | } | |
2687 | ||
2688 | /* At this point, the session and channel exist on the tracer */ | |
2689 | ||
2690 | switch (event_type) { | |
2691 | case LTTNG_EVENT_ALL: | |
2692 | case LTTNG_EVENT_TRACEPOINT: | |
2693 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2694 | if (ret != LTTCOMM_OK) { | |
2695 | goto error; | |
2696 | } | |
2697 | break; | |
2698 | default: | |
2699 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2700 | goto error; | |
2701 | } | |
2702 | ||
2703 | /* Manage return value */ | |
2704 | if (ret != LTTCOMM_OK) { | |
2705 | goto error; | |
2706 | } | |
2707 | ||
2708 | break; | |
2709 | } | |
d78d6610 | 2710 | #if 0 |
76d45b40 DG |
2711 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2712 | case LTTNG_DOMAIN_UST_PID: | |
2713 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2714 | #endif |
54d01ffb | 2715 | default: |
1ab1ea0b | 2716 | ret = LTTCOMM_UND; |
54d01ffb | 2717 | goto error; |
d36b8583 | 2718 | } |
f3ed775e | 2719 | |
54d01ffb DG |
2720 | ret = LTTCOMM_OK; |
2721 | ||
2722 | error: | |
2723 | return ret; | |
2724 | } | |
2725 | ||
2726 | /* | |
2727 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2728 | */ | |
2729 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2730 | { | |
2731 | int ret; | |
2732 | ssize_t nb_events = 0; | |
2733 | ||
2734 | switch (domain) { | |
2735 | case LTTNG_DOMAIN_KERNEL: | |
2736 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2737 | if (nb_events < 0) { | |
2738 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2739 | goto error; | |
894be886 | 2740 | } |
54d01ffb | 2741 | break; |
b551a063 DG |
2742 | case LTTNG_DOMAIN_UST: |
2743 | nb_events = ust_app_list_events(events); | |
2744 | if (nb_events < 0) { | |
2745 | ret = LTTCOMM_UST_LIST_FAIL; | |
2746 | goto error; | |
2747 | } | |
2748 | break; | |
54d01ffb | 2749 | default: |
1ab1ea0b | 2750 | ret = LTTCOMM_UND; |
54d01ffb DG |
2751 | goto error; |
2752 | } | |
894be886 | 2753 | |
54d01ffb | 2754 | return nb_events; |
7d29a247 | 2755 | |
54d01ffb DG |
2756 | error: |
2757 | /* Return negative value to differentiate return code */ | |
2758 | return -ret; | |
2759 | } | |
b389abbe | 2760 | |
54d01ffb DG |
2761 | /* |
2762 | * Command LTTNG_START_TRACE processed by the client thread. | |
2763 | */ | |
2764 | static int cmd_start_trace(struct ltt_session *session) | |
2765 | { | |
2766 | int ret; | |
54d01ffb | 2767 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2768 | struct ltt_ust_session *usess; |
b389abbe | 2769 | |
54d01ffb DG |
2770 | /* Short cut */ |
2771 | ksession = session->kernel_session; | |
b9d9b220 | 2772 | usess = session->ust_session; |
5eb91c98 | 2773 | |
b9ef1c83 DG |
2774 | if (session->enabled) { |
2775 | ret = LTTCOMM_UST_START_FAIL; | |
2776 | goto error; | |
2777 | } | |
2778 | ||
464dd62d MD |
2779 | session->enabled = 1; |
2780 | ||
54d01ffb DG |
2781 | /* Kernel tracing */ |
2782 | if (ksession != NULL) { | |
2bdd86d4 MD |
2783 | struct ltt_kernel_channel *kchan; |
2784 | ||
54d01ffb DG |
2785 | /* Open kernel metadata */ |
2786 | if (ksession->metadata == NULL) { | |
2787 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2788 | if (ret < 0) { | |
2789 | ret = LTTCOMM_KERN_META_FAIL; | |
2790 | goto error; | |
b389abbe | 2791 | } |
54d01ffb | 2792 | } |
7d29a247 | 2793 | |
54d01ffb DG |
2794 | /* Open kernel metadata stream */ |
2795 | if (ksession->metadata_stream_fd == 0) { | |
2796 | ret = kernel_open_metadata_stream(ksession); | |
2797 | if (ret < 0) { | |
2798 | ERR("Kernel create metadata stream failed"); | |
2799 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2800 | goto error; | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | /* For each channel */ | |
2805 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2806 | if (kchan->stream_count == 0) { | |
2807 | ret = kernel_open_channel_stream(kchan); | |
2808 | if (ret < 0) { | |
2809 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2810 | goto error; |
2811 | } | |
54d01ffb DG |
2812 | /* Update the stream global counter */ |
2813 | ksession->stream_count_global += ret; | |
7d29a247 | 2814 | } |
54d01ffb DG |
2815 | } |
2816 | ||
2817 | /* Setup kernel consumer socket and send fds to it */ | |
2818 | ret = init_kernel_tracing(ksession); | |
2819 | if (ret < 0) { | |
2820 | ret = LTTCOMM_KERN_START_FAIL; | |
2821 | goto error; | |
2822 | } | |
2823 | ||
2824 | /* This start the kernel tracing */ | |
2825 | ret = kernel_start_session(ksession); | |
2826 | if (ret < 0) { | |
2827 | ret = LTTCOMM_KERN_START_FAIL; | |
2828 | goto error; | |
2829 | } | |
2830 | ||
2831 | /* Quiescent wait after starting trace */ | |
2832 | kernel_wait_quiescent(kernel_tracer_fd); | |
2833 | } | |
2834 | ||
36dc12cc | 2835 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2836 | if (usess) { |
2837 | usess->start_trace = 1; | |
36dc12cc | 2838 | |
b9d9b220 DG |
2839 | ret = ust_app_start_trace_all(usess); |
2840 | if (ret < 0) { | |
2841 | ret = LTTCOMM_UST_START_FAIL; | |
2842 | goto error; | |
2843 | } | |
2bdd86d4 | 2844 | } |
54d01ffb DG |
2845 | |
2846 | ret = LTTCOMM_OK; | |
2847 | ||
2848 | error: | |
2849 | return ret; | |
2850 | } | |
2851 | ||
2852 | /* | |
2853 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2854 | */ | |
2855 | static int cmd_stop_trace(struct ltt_session *session) | |
2856 | { | |
2857 | int ret; | |
2858 | struct ltt_kernel_channel *kchan; | |
2859 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2860 | struct ltt_ust_session *usess; |
54d01ffb DG |
2861 | |
2862 | /* Short cut */ | |
2863 | ksession = session->kernel_session; | |
8be98f9a | 2864 | usess = session->ust_session; |
54d01ffb | 2865 | |
b9ef1c83 | 2866 | if (!session->enabled) { |
190df5ac | 2867 | ret = LTTCOMM_UST_STOP_FAIL; |
b9ef1c83 DG |
2868 | goto error; |
2869 | } | |
2870 | ||
464dd62d MD |
2871 | session->enabled = 0; |
2872 | ||
54d01ffb DG |
2873 | /* Kernel tracer */ |
2874 | if (ksession != NULL) { | |
2875 | DBG("Stop kernel tracing"); | |
2876 | ||
2877 | /* Flush all buffers before stopping */ | |
2878 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2879 | if (ret < 0) { | |
2880 | ERR("Kernel metadata flush failed"); | |
2881 | } | |
f34daff7 | 2882 | |
54d01ffb DG |
2883 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2884 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2885 | if (ret < 0) { |
54d01ffb | 2886 | ERR("Kernel flush buffer error"); |
7d29a247 | 2887 | } |
54d01ffb | 2888 | } |
19e70852 | 2889 | |
54d01ffb DG |
2890 | ret = kernel_stop_session(ksession); |
2891 | if (ret < 0) { | |
2892 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2893 | goto error; |
f3ed775e | 2894 | } |
54d01ffb DG |
2895 | |
2896 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2897 | } |
54d01ffb | 2898 | |
8be98f9a MD |
2899 | if (usess) { |
2900 | usess->start_trace = 0; | |
2bdd86d4 | 2901 | |
8be98f9a | 2902 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2903 | if (ret < 0) { |
190df5ac | 2904 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2905 | goto error; |
2906 | } | |
2bdd86d4 | 2907 | } |
54d01ffb DG |
2908 | |
2909 | ret = LTTCOMM_OK; | |
2910 | ||
2911 | error: | |
2912 | return ret; | |
2913 | } | |
2914 | ||
2915 | /* | |
2916 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2917 | */ | |
730389d9 | 2918 | static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds) |
54d01ffb DG |
2919 | { |
2920 | int ret; | |
2921 | ||
730389d9 DG |
2922 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
2923 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb DG |
2924 | if (ret != LTTCOMM_OK) { |
2925 | goto error; | |
2926 | } | |
2927 | ||
2928 | ret = LTTCOMM_OK; | |
2929 | ||
2930 | error: | |
2931 | return ret; | |
2932 | } | |
2933 | ||
2934 | /* | |
2935 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2936 | */ | |
2937 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2938 | { | |
2939 | int ret; | |
2940 | ||
2941 | /* Clean kernel session teardown */ | |
2942 | teardown_kernel_session(session); | |
84cd17c6 MD |
2943 | /* UST session teardown */ |
2944 | teardown_ust_session(session); | |
54d01ffb DG |
2945 | |
2946 | /* | |
2947 | * Must notify the kernel thread here to update it's poll setin order | |
2948 | * to remove the channel(s)' fd just destroyed. | |
2949 | */ | |
2950 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2951 | if (ret < 0) { | |
2952 | perror("write kernel poll pipe"); | |
2953 | } | |
2954 | ||
271933a4 | 2955 | ret = session_destroy(session); |
54d01ffb DG |
2956 | |
2957 | return ret; | |
2958 | } | |
2959 | ||
2960 | /* | |
2961 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2962 | */ | |
2963 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2964 | { | |
2965 | int ret; | |
2966 | ||
2967 | switch (domain) { | |
2968 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2969 | { |
54d01ffb | 2970 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2971 | |
54d01ffb DG |
2972 | kcalibrate.type = calibrate->type; |
2973 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2974 | if (ret < 0) { |
54d01ffb DG |
2975 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2976 | goto error; | |
33a2b854 | 2977 | } |
54d01ffb DG |
2978 | break; |
2979 | } | |
4466912f DG |
2980 | case LTTNG_DOMAIN_UST: |
2981 | { | |
2982 | struct lttng_ust_calibrate ucalibrate; | |
2983 | ||
2984 | ucalibrate.type = calibrate->type; | |
2985 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2986 | if (ret < 0) { | |
2987 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
2988 | goto error; | |
2989 | } | |
2990 | break; | |
2991 | } | |
54d01ffb | 2992 | default: |
1ab1ea0b | 2993 | ret = LTTCOMM_UND; |
54d01ffb DG |
2994 | goto error; |
2995 | } | |
33a2b854 | 2996 | |
54d01ffb | 2997 | ret = LTTCOMM_OK; |
33a2b854 | 2998 | |
54d01ffb DG |
2999 | error: |
3000 | return ret; | |
3001 | } | |
7d29a247 | 3002 | |
54d01ffb DG |
3003 | /* |
3004 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
3005 | */ | |
3006 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
3007 | char *sock_path) | |
3008 | { | |
3009 | int ret, sock; | |
b389abbe | 3010 | |
54d01ffb DG |
3011 | switch (domain) { |
3012 | case LTTNG_DOMAIN_KERNEL: | |
3013 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3014 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3015 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3016 | goto error; | |
3017 | } | |
3018 | ||
3019 | sock = lttcomm_connect_unix_sock(sock_path); | |
3020 | if (sock < 0) { | |
3021 | ret = LTTCOMM_CONNECT_FAIL; | |
3022 | goto error; | |
3023 | } | |
3024 | ||
3025 | session->kernel_session->consumer_fd = sock; | |
3026 | break; | |
3027 | default: | |
3028 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3029 | ret = LTTCOMM_UND; |
54d01ffb DG |
3030 | goto error; |
3031 | } | |
3032 | ||
3033 | ret = LTTCOMM_OK; | |
3034 | ||
3035 | error: | |
3036 | return ret; | |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3041 | */ | |
3042 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3043 | struct lttng_domain **domains) | |
3044 | { | |
b551a063 | 3045 | int ret, index = 0; |
54d01ffb DG |
3046 | ssize_t nb_dom = 0; |
3047 | ||
3048 | if (session->kernel_session != NULL) { | |
b551a063 | 3049 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3050 | nb_dom++; |
3051 | } | |
3052 | ||
b551a063 DG |
3053 | if (session->ust_session != NULL) { |
3054 | DBG3("Listing domains found UST global domain"); | |
3055 | nb_dom++; | |
3056 | } | |
54d01ffb | 3057 | |
b551a063 | 3058 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3059 | if (*domains == NULL) { |
3060 | ret = -LTTCOMM_FATAL; | |
3061 | goto error; | |
3062 | } | |
3063 | ||
b551a063 DG |
3064 | if (session->kernel_session != NULL) { |
3065 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3066 | index++; | |
3067 | } | |
3068 | ||
3069 | if (session->ust_session != NULL) { | |
3070 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3071 | index++; | |
3072 | } | |
54d01ffb | 3073 | |
54d01ffb DG |
3074 | return nb_dom; |
3075 | ||
3076 | error: | |
3077 | return ret; | |
3078 | } | |
3079 | ||
3080 | /* | |
3081 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3082 | */ | |
b551a063 | 3083 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3084 | struct lttng_channel **channels) |
3085 | { | |
3086 | int ret; | |
3087 | ssize_t nb_chan = 0; | |
3088 | ||
b551a063 DG |
3089 | switch (domain) { |
3090 | case LTTNG_DOMAIN_KERNEL: | |
3091 | if (session->kernel_session != NULL) { | |
3092 | nb_chan = session->kernel_session->channel_count; | |
3093 | } | |
0df502fd | 3094 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3095 | break; |
3096 | case LTTNG_DOMAIN_UST: | |
3097 | if (session->ust_session != NULL) { | |
bec39940 | 3098 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3099 | session->ust_session->domain_global.channels); |
3100 | } | |
0df502fd | 3101 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3102 | break; |
3103 | default: | |
3104 | *channels = NULL; | |
1ab1ea0b | 3105 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3106 | goto error; |
3107 | } | |
3108 | ||
b551a063 DG |
3109 | if (nb_chan > 0) { |
3110 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3111 | if (*channels == NULL) { | |
3112 | ret = -LTTCOMM_FATAL; | |
3113 | goto error; | |
3114 | } | |
54d01ffb | 3115 | |
b551a063 DG |
3116 | list_lttng_channels(domain, session, *channels); |
3117 | } else { | |
3118 | *channels = NULL; | |
3119 | } | |
2bdd86d4 | 3120 | |
54d01ffb DG |
3121 | return nb_chan; |
3122 | ||
3123 | error: | |
3124 | return ret; | |
3125 | } | |
3126 | ||
3127 | /* | |
3128 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3129 | */ | |
b551a063 | 3130 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3131 | char *channel_name, struct lttng_event **events) |
3132 | { | |
b551a063 | 3133 | int ret = 0; |
54d01ffb | 3134 | ssize_t nb_event = 0; |
54d01ffb | 3135 | |
b551a063 DG |
3136 | switch (domain) { |
3137 | case LTTNG_DOMAIN_KERNEL: | |
3138 | if (session->kernel_session != NULL) { | |
3139 | nb_event = list_lttng_kernel_events(channel_name, | |
3140 | session->kernel_session, events); | |
54d01ffb | 3141 | } |
b551a063 DG |
3142 | break; |
3143 | case LTTNG_DOMAIN_UST: | |
3144 | { | |
3145 | if (session->ust_session != NULL) { | |
3146 | nb_event = list_lttng_ust_global_events(channel_name, | |
3147 | &session->ust_session->domain_global, events); | |
3148 | } | |
3149 | break; | |
54d01ffb | 3150 | } |
b551a063 | 3151 | default: |
1ab1ea0b | 3152 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3153 | goto error; |
3154 | } | |
3155 | ||
b551a063 | 3156 | ret = nb_event; |
54d01ffb DG |
3157 | |
3158 | error: | |
3159 | return ret; | |
3160 | } | |
3161 | ||
3162 | /* | |
3163 | * Process the command requested by the lttng client within the command | |
3164 | * context structure. This function make sure that the return structure (llm) | |
3165 | * is set and ready for transmission before returning. | |
3166 | * | |
3167 | * Return any error encountered or 0 for success. | |
3168 | */ | |
3169 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3170 | { | |
3171 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3172 | int need_tracing_session = 1; |
2e09ba09 | 3173 | int need_domain; |
54d01ffb DG |
3174 | |
3175 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3176 | ||
2e09ba09 MD |
3177 | switch (cmd_ctx->lsm->cmd_type) { |
3178 | case LTTNG_CREATE_SESSION: | |
3179 | case LTTNG_DESTROY_SESSION: | |
3180 | case LTTNG_LIST_SESSIONS: | |
3181 | case LTTNG_LIST_DOMAINS: | |
3182 | case LTTNG_START_TRACE: | |
3183 | case LTTNG_STOP_TRACE: | |
3184 | need_domain = 0; | |
3aace903 | 3185 | break; |
2e09ba09 MD |
3186 | default: |
3187 | need_domain = 1; | |
3188 | } | |
3189 | ||
3190 | if (opt_no_kernel && need_domain | |
3191 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
4fba7219 DG |
3192 | ret = LTTCOMM_KERN_NA; |
3193 | goto error; | |
3194 | } | |
3195 | ||
54d01ffb DG |
3196 | /* |
3197 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3198 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3199 | * command. |
3200 | */ | |
3201 | switch(cmd_ctx->lsm->cmd_type) { | |
3202 | case LTTNG_LIST_SESSIONS: | |
3203 | case LTTNG_LIST_TRACEPOINTS: | |
3204 | case LTTNG_LIST_DOMAINS: | |
3205 | case LTTNG_LIST_CHANNELS: | |
3206 | case LTTNG_LIST_EVENTS: | |
3207 | break; | |
3208 | default: | |
3209 | /* Setup lttng message with no payload */ | |
3210 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3211 | if (ret < 0) { | |
3212 | /* This label does not try to unlock the session */ | |
3213 | goto init_setup_error; | |
3214 | } | |
3215 | } | |
3216 | ||
3217 | /* Commands that DO NOT need a session. */ | |
3218 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3219 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 3220 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3221 | case LTTNG_LIST_SESSIONS: |
3222 | case LTTNG_LIST_TRACEPOINTS: | |
44d3bd01 | 3223 | need_tracing_session = 0; |
54d01ffb DG |
3224 | break; |
3225 | default: | |
3226 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
74babd95 | 3227 | session_lock_list(); |
54d01ffb | 3228 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
74babd95 | 3229 | session_unlock_list(); |
54d01ffb DG |
3230 | if (cmd_ctx->session == NULL) { |
3231 | if (cmd_ctx->lsm->session.name != NULL) { | |
3232 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3233 | } else { | |
3234 | /* If no session name specified */ | |
3235 | ret = LTTCOMM_SELECT_SESS; | |
3236 | } | |
3237 | goto error; | |
3238 | } else { | |
3239 | /* Acquire lock for the session */ | |
3240 | session_lock(cmd_ctx->session); | |
3241 | } | |
3242 | break; | |
3243 | } | |
b389abbe | 3244 | |
2e09ba09 MD |
3245 | if (!need_domain) { |
3246 | goto skip_domain; | |
3247 | } | |
54d01ffb DG |
3248 | /* |
3249 | * Check domain type for specific "pre-action". | |
3250 | */ | |
3251 | switch (cmd_ctx->lsm->domain.type) { | |
3252 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 DG |
3253 | if (!is_root) { |
3254 | ret = LTTCOMM_KERN_NA; | |
3255 | goto error; | |
3256 | } | |
3257 | ||
54d01ffb DG |
3258 | /* Kernel tracer check */ |
3259 | if (kernel_tracer_fd == 0) { | |
3260 | /* Basically, load kernel tracer modules */ | |
096102bd DG |
3261 | ret = init_kernel_tracer(); |
3262 | if (ret != 0) { | |
54d01ffb DG |
3263 | goto error; |
3264 | } | |
3265 | } | |
5eb91c98 | 3266 | |
54d01ffb | 3267 | /* Need a session for kernel command */ |
44d3bd01 | 3268 | if (need_tracing_session) { |
54d01ffb | 3269 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3270 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3271 | if (ret < 0) { |
54d01ffb | 3272 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3273 | goto error; |
3274 | } | |
b389abbe | 3275 | } |
7d29a247 | 3276 | |
54d01ffb | 3277 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3278 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3279 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3280 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3281 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3282 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3283 | if (ret < 0) { |
54d01ffb DG |
3284 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3285 | goto error; | |
950131af | 3286 | } |
3ff2ecac MD |
3287 | } else { |
3288 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3289 | } |
0d0c377a | 3290 | } |
54d01ffb | 3291 | break; |
2bdd86d4 | 3292 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3293 | { |
44d3bd01 | 3294 | if (need_tracing_session) { |
f6a9efaa | 3295 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3296 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3297 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3298 | if (ret != LTTCOMM_OK) { |
3299 | goto error; | |
3300 | } | |
3301 | } | |
7753dea8 MD |
3302 | /* Start the UST consumer daemons */ |
3303 | /* 64-bit */ | |
3304 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3305 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3306 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3307 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3308 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3309 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3310 | if (ret < 0) { |
7753dea8 MD |
3311 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3312 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3313 | goto error; |
3314 | } | |
48842b30 | 3315 | |
7753dea8 | 3316 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
3ff2ecac | 3317 | } else { |
7753dea8 MD |
3318 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3319 | } | |
3320 | /* 32-bit */ | |
fc7a59ce | 3321 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3322 | ustconsumer32_data.pid == 0 && |
3323 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3324 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3325 | ret = start_consumerd(&ustconsumer32_data); | |
3326 | if (ret < 0) { | |
3327 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3328 | ust_consumerd32_fd = -EINVAL; | |
3329 | goto error; | |
3330 | } | |
3331 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; | |
3332 | } else { | |
3333 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3334 | } |
44d3bd01 DG |
3335 | } |
3336 | break; | |
48842b30 | 3337 | } |
54d01ffb | 3338 | default: |
54d01ffb DG |
3339 | break; |
3340 | } | |
2e09ba09 | 3341 | skip_domain: |
33a2b854 | 3342 | |
8e0af1b4 MD |
3343 | /* |
3344 | * Check that the UID or GID match that of the tracing session. | |
3345 | * The root user can interact with all sessions. | |
3346 | */ | |
3347 | if (need_tracing_session) { | |
3348 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3349 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3350 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
3351 | ret = LTTCOMM_EPERM; |
3352 | goto error; | |
3353 | } | |
3354 | } | |
3355 | ||
54d01ffb DG |
3356 | /* Process by command type */ |
3357 | switch (cmd_ctx->lsm->cmd_type) { | |
3358 | case LTTNG_ADD_CONTEXT: | |
3359 | { | |
3360 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3361 | cmd_ctx->lsm->u.context.channel_name, | |
3362 | cmd_ctx->lsm->u.context.event_name, | |
3363 | &cmd_ctx->lsm->u.context.ctx); | |
3364 | break; | |
3365 | } | |
3366 | case LTTNG_DISABLE_CHANNEL: | |
3367 | { | |
3368 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3369 | cmd_ctx->lsm->u.disable.channel_name); | |
3370 | break; | |
3371 | } | |
3372 | case LTTNG_DISABLE_EVENT: | |
3373 | { | |
3374 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3375 | cmd_ctx->lsm->u.disable.channel_name, | |
3376 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3377 | break; |
3378 | } | |
54d01ffb DG |
3379 | case LTTNG_DISABLE_ALL_EVENT: |
3380 | { | |
2bdd86d4 | 3381 | DBG("Disabling all events"); |
54d01ffb DG |
3382 | |
3383 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3384 | cmd_ctx->lsm->u.disable.channel_name); | |
3385 | break; | |
3386 | } | |
3387 | case LTTNG_ENABLE_CHANNEL: | |
3388 | { | |
aea829b3 | 3389 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3390 | &cmd_ctx->lsm->u.channel.chan); |
3391 | break; | |
3392 | } | |
3393 | case LTTNG_ENABLE_EVENT: | |
3394 | { | |
3395 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3396 | cmd_ctx->lsm->u.enable.channel_name, | |
3397 | &cmd_ctx->lsm->u.enable.event); | |
3398 | break; | |
3399 | } | |
3400 | case LTTNG_ENABLE_ALL_EVENT: | |
3401 | { | |
2bdd86d4 | 3402 | DBG("Enabling all events"); |
54d01ffb DG |
3403 | |
3404 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3405 | cmd_ctx->lsm->u.enable.channel_name, |
3406 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3407 | break; |
3408 | } | |
052da939 | 3409 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3410 | { |
9f19cc17 | 3411 | struct lttng_event *events; |
54d01ffb | 3412 | ssize_t nb_events; |
052da939 | 3413 | |
54d01ffb DG |
3414 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3415 | if (nb_events < 0) { | |
3416 | ret = -nb_events; | |
3417 | goto error; | |
2ef84c95 DG |
3418 | } |
3419 | ||
3420 | /* | |
3421 | * Setup lttng message with payload size set to the event list size in | |
3422 | * bytes and then copy list into the llm payload. | |
3423 | */ | |
052da939 | 3424 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3425 | if (ret < 0) { |
052da939 | 3426 | free(events); |
2ef84c95 DG |
3427 | goto setup_error; |
3428 | } | |
3429 | ||
3430 | /* Copy event list into message payload */ | |
9f19cc17 | 3431 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3432 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3433 | |
9f19cc17 | 3434 | free(events); |
2ef84c95 DG |
3435 | |
3436 | ret = LTTCOMM_OK; | |
3437 | break; | |
3438 | } | |
f3ed775e | 3439 | case LTTNG_START_TRACE: |
8c0faa1d | 3440 | { |
54d01ffb | 3441 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3442 | break; |
3443 | } | |
f3ed775e | 3444 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3445 | { |
54d01ffb | 3446 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3447 | break; |
3448 | } | |
5e16da05 MD |
3449 | case LTTNG_CREATE_SESSION: |
3450 | { | |
54d01ffb | 3451 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3452 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3453 | break; |
3454 | } | |
3455 | case LTTNG_DESTROY_SESSION: | |
3456 | { | |
54d01ffb DG |
3457 | ret = cmd_destroy_session(cmd_ctx->session, |
3458 | cmd_ctx->lsm->session.name); | |
5461b305 | 3459 | break; |
5e16da05 | 3460 | } |
9f19cc17 | 3461 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3462 | { |
54d01ffb DG |
3463 | ssize_t nb_dom; |
3464 | struct lttng_domain *domains; | |
5461b305 | 3465 | |
54d01ffb DG |
3466 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3467 | if (nb_dom < 0) { | |
3468 | ret = -nb_dom; | |
3469 | goto error; | |
ce3d728c | 3470 | } |
520ff687 | 3471 | |
54d01ffb | 3472 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3473 | if (ret < 0) { |
3474 | goto setup_error; | |
520ff687 | 3475 | } |
57167058 | 3476 | |
54d01ffb DG |
3477 | /* Copy event list into message payload */ |
3478 | memcpy(cmd_ctx->llm->payload, domains, | |
3479 | nb_dom * sizeof(struct lttng_domain)); | |
3480 | ||
3481 | free(domains); | |
5e16da05 | 3482 | |
5461b305 | 3483 | ret = LTTCOMM_OK; |
5e16da05 MD |
3484 | break; |
3485 | } | |
9f19cc17 | 3486 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3487 | { |
54d01ffb DG |
3488 | size_t nb_chan; |
3489 | struct lttng_channel *channels; | |
3490 | ||
b551a063 DG |
3491 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3492 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3493 | if (nb_chan < 0) { |
3494 | ret = -nb_chan; | |
3495 | goto error; | |
5461b305 | 3496 | } |
ca95a216 | 3497 | |
54d01ffb | 3498 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3499 | if (ret < 0) { |
3500 | goto setup_error; | |
3501 | } | |
9f19cc17 | 3502 | |
54d01ffb DG |
3503 | /* Copy event list into message payload */ |
3504 | memcpy(cmd_ctx->llm->payload, channels, | |
3505 | nb_chan * sizeof(struct lttng_channel)); | |
3506 | ||
3507 | free(channels); | |
9f19cc17 DG |
3508 | |
3509 | ret = LTTCOMM_OK; | |
5461b305 | 3510 | break; |
5e16da05 | 3511 | } |
9f19cc17 | 3512 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3513 | { |
b551a063 | 3514 | ssize_t nb_event; |
684d34d2 | 3515 | struct lttng_event *events = NULL; |
9f19cc17 | 3516 | |
b551a063 | 3517 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3518 | cmd_ctx->lsm->u.list.channel_name, &events); |
3519 | if (nb_event < 0) { | |
3520 | ret = -nb_event; | |
3521 | goto error; | |
5461b305 | 3522 | } |
ca95a216 | 3523 | |
54d01ffb | 3524 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3525 | if (ret < 0) { |
3526 | goto setup_error; | |
3527 | } | |
9f19cc17 | 3528 | |
54d01ffb DG |
3529 | /* Copy event list into message payload */ |
3530 | memcpy(cmd_ctx->llm->payload, events, | |
3531 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3532 | |
54d01ffb | 3533 | free(events); |
9f19cc17 DG |
3534 | |
3535 | ret = LTTCOMM_OK; | |
5461b305 | 3536 | break; |
5e16da05 MD |
3537 | } |
3538 | case LTTNG_LIST_SESSIONS: | |
3539 | { | |
8e0af1b4 | 3540 | unsigned int nr_sessions; |
5461b305 | 3541 | |
8e0af1b4 | 3542 | session_lock_list(); |
730389d9 DG |
3543 | nr_sessions = lttng_sessions_count( |
3544 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3545 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3546 | |
8e0af1b4 | 3547 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3548 | if (ret < 0) { |
54d01ffb | 3549 | session_unlock_list(); |
5461b305 | 3550 | goto setup_error; |
e065084a | 3551 | } |
5e16da05 | 3552 | |
6c9cc2ab | 3553 | /* Filled the session array */ |
8e0af1b4 | 3554 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3555 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3556 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3557 | |
54d01ffb | 3558 | session_unlock_list(); |
5e16da05 | 3559 | |
5461b305 | 3560 | ret = LTTCOMM_OK; |
5e16da05 MD |
3561 | break; |
3562 | } | |
d0254c7c MD |
3563 | case LTTNG_CALIBRATE: |
3564 | { | |
54d01ffb DG |
3565 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3566 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3567 | break; |
3568 | } | |
d9800920 DG |
3569 | case LTTNG_REGISTER_CONSUMER: |
3570 | { | |
54d01ffb DG |
3571 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3572 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3573 | break; |
3574 | } | |
5e16da05 | 3575 | default: |
5e16da05 | 3576 | ret = LTTCOMM_UND; |
5461b305 | 3577 | break; |
fac6795d DG |
3578 | } |
3579 | ||
5461b305 | 3580 | error: |
5461b305 DG |
3581 | if (cmd_ctx->llm == NULL) { |
3582 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3583 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3584 | goto setup_error; |
3585 | } | |
3586 | } | |
54d01ffb | 3587 | /* Set return code */ |
5461b305 | 3588 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3589 | setup_error: |
b5541356 | 3590 | if (cmd_ctx->session) { |
54d01ffb | 3591 | session_unlock(cmd_ctx->session); |
b5541356 | 3592 | } |
54d01ffb | 3593 | init_setup_error: |
8028d920 | 3594 | return ret; |
fac6795d DG |
3595 | } |
3596 | ||
1d4b027a | 3597 | /* |
d063d709 DG |
3598 | * This thread manage all clients request using the unix client socket for |
3599 | * communication. | |
1d4b027a DG |
3600 | */ |
3601 | static void *thread_manage_clients(void *data) | |
3602 | { | |
5eb91c98 DG |
3603 | int sock = 0, ret, i, pollfd; |
3604 | uint32_t revents, nb_fd; | |
273ea72c | 3605 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3606 | struct lttng_poll_event events; |
1d4b027a DG |
3607 | |
3608 | DBG("[thread] Manage client started"); | |
3609 | ||
f6a9efaa DG |
3610 | rcu_register_thread(); |
3611 | ||
1d4b027a DG |
3612 | ret = lttcomm_listen_unix_sock(client_sock); |
3613 | if (ret < 0) { | |
3614 | goto error; | |
3615 | } | |
3616 | ||
5eb91c98 DG |
3617 | /* |
3618 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3619 | * more will be added to this poll set. | |
3620 | */ | |
3621 | ret = create_thread_poll_set(&events, 2); | |
3622 | if (ret < 0) { | |
3623 | goto error; | |
3624 | } | |
273ea72c | 3625 | |
5eb91c98 DG |
3626 | /* Add the application registration socket */ |
3627 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3628 | if (ret < 0) { | |
3629 | goto error; | |
3630 | } | |
273ea72c | 3631 | |
bbd973c2 DG |
3632 | /* |
3633 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3634 | */ |
3635 | if (opt_sig_parent) { | |
8db8d1dc | 3636 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3637 | } |
3638 | ||
3639 | while (1) { | |
1d4b027a | 3640 | DBG("Accepting client command ..."); |
273ea72c | 3641 | |
5eb91c98 DG |
3642 | nb_fd = LTTNG_POLL_GETNB(&events); |
3643 | ||
273ea72c | 3644 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 3645 | restart: |
5eb91c98 | 3646 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3647 | if (ret < 0) { |
88f2b785 MD |
3648 | /* |
3649 | * Restart interrupted system call. | |
3650 | */ | |
3651 | if (errno == EINTR) { | |
3652 | goto restart; | |
3653 | } | |
273ea72c DG |
3654 | goto error; |
3655 | } | |
3656 | ||
5eb91c98 DG |
3657 | for (i = 0; i < nb_fd; i++) { |
3658 | /* Fetch once the poll data */ | |
3659 | revents = LTTNG_POLL_GETEV(&events, i); | |
3660 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3661 | ||
3662 | /* Thread quit pipe has been closed. Killing thread. */ | |
3663 | ret = check_thread_quit_pipe(pollfd, revents); | |
3664 | if (ret) { | |
3665 | goto error; | |
3666 | } | |
3667 | ||
3668 | /* Event on the registration socket */ | |
3669 | if (pollfd == client_sock) { | |
3670 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3671 | ERR("Client socket poll error"); | |
3672 | goto error; | |
3673 | } | |
3674 | } | |
3675 | } | |
3676 | ||
3677 | DBG("Wait for client response"); | |
3678 | ||
3679 | sock = lttcomm_accept_unix_sock(client_sock); | |
3680 | if (sock < 0) { | |
273ea72c | 3681 | goto error; |
273ea72c DG |
3682 | } |
3683 | ||
be040666 DG |
3684 | /* Set socket option for credentials retrieval */ |
3685 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3686 | if (ret < 0) { | |
3687 | goto error; | |
3688 | } | |
3689 | ||
5eb91c98 | 3690 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3691 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3692 | if (cmd_ctx == NULL) { |
ba7f0ae5 | 3693 | perror("zmalloc cmd_ctx"); |
1d4b027a | 3694 | goto error; |
5eb91c98 | 3695 | } |
1d4b027a | 3696 | |
5eb91c98 | 3697 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3698 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3699 | if (cmd_ctx->lsm == NULL) { |
ba7f0ae5 | 3700 | perror("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3701 | goto error; |
3702 | } | |
1d4b027a | 3703 | |
5eb91c98 DG |
3704 | cmd_ctx->llm = NULL; |
3705 | cmd_ctx->session = NULL; | |
1d4b027a | 3706 | |
5eb91c98 DG |
3707 | /* |
3708 | * Data is received from the lttng client. The struct | |
3709 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3710 | * the client. | |
3711 | */ | |
3712 | DBG("Receiving data from client ..."); | |
be040666 DG |
3713 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3714 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3715 | if (ret <= 0) { |
3716 | DBG("Nothing recv() from client... continuing"); | |
3717 | close(sock); | |
3718 | free(cmd_ctx); | |
3719 | continue; | |
3720 | } | |
1d4b027a | 3721 | |
5eb91c98 DG |
3722 | // TODO: Validate cmd_ctx including sanity check for |
3723 | // security purpose. | |
f7776ea7 | 3724 | |
f6a9efaa | 3725 | rcu_thread_online(); |
5eb91c98 DG |
3726 | /* |
3727 | * This function dispatch the work to the kernel or userspace tracer | |
3728 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3729 | * informations for the client. The command context struct contains | |
3730 | * everything this function may needs. | |
3731 | */ | |
3732 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3733 | rcu_thread_offline(); |
5eb91c98 | 3734 | if (ret < 0) { |
bbd973c2 | 3735 | /* |
5eb91c98 | 3736 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3737 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3738 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3739 | */ |
bbd973c2 | 3740 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3741 | continue; |
3742 | } | |
d6e4fca4 | 3743 | |
54d01ffb DG |
3744 | DBG("Sending response (size: %d, retcode: %s)", |
3745 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3746 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3747 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3748 | if (ret < 0) { |
3749 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3750 | } |
1d4b027a | 3751 | |
5eb91c98 | 3752 | /* End of transmission */ |
273ea72c | 3753 | close(sock); |
be040666 DG |
3754 | |
3755 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3756 | } |
3757 | ||
5eb91c98 DG |
3758 | error: |
3759 | DBG("Client thread dying"); | |
273ea72c | 3760 | unlink(client_unix_sock_path); |
5eb91c98 DG |
3761 | close(client_sock); |
3762 | close(sock); | |
273ea72c | 3763 | |
5eb91c98 | 3764 | lttng_poll_clean(&events); |
a2fb29a5 | 3765 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3766 | |
3767 | rcu_unregister_thread(); | |
1d4b027a DG |
3768 | return NULL; |
3769 | } | |
3770 | ||
3771 | ||
fac6795d DG |
3772 | /* |
3773 | * usage function on stderr | |
3774 | */ | |
3775 | static void usage(void) | |
3776 | { | |
b716ce68 | 3777 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3778 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3779 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3780 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3781 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3782 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3783 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3784 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3785 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3786 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3787 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3788 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3789 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3790 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3791 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3792 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3793 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3794 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3795 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3796 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3797 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3798 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3799 | } |
3800 | ||
3801 | /* | |
3802 | * daemon argument parsing | |
3803 | */ | |
3804 | static int parse_args(int argc, char **argv) | |
3805 | { | |
3806 | int c; | |
3807 | ||
3808 | static struct option long_options[] = { | |
3809 | { "client-sock", 1, 0, 'c' }, | |
3810 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3811 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3812 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3813 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3814 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3815 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3816 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3817 | { "consumerd32-path", 1, 0, 'u' }, | |
3818 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3819 | { "consumerd64-path", 1, 0, 't' }, | |
3820 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3821 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3822 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3823 | { "help", 0, 0, 'h' }, |
3824 | { "group", 1, 0, 'g' }, | |
3825 | { "version", 0, 0, 'V' }, | |
75462a81 | 3826 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3827 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3828 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3829 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3830 | { NULL, 0, 0, 0 } |
3831 | }; | |
3832 | ||
3833 | while (1) { | |
3834 | int option_index = 0; | |
4fba7219 | 3835 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3836 | long_options, &option_index); |
fac6795d DG |
3837 | if (c == -1) { |
3838 | break; | |
3839 | } | |
3840 | ||
3841 | switch (c) { | |
3842 | case 0: | |
3843 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3844 | if (optarg) { | |
3845 | fprintf(stderr, " with arg %s\n", optarg); | |
3846 | } | |
3847 | break; | |
b716ce68 | 3848 | case 'c': |
fac6795d DG |
3849 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3850 | break; | |
3851 | case 'a': | |
3852 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3853 | break; | |
3854 | case 'd': | |
3855 | opt_daemon = 1; | |
3856 | break; | |
3857 | case 'g': | |
fb09408a | 3858 | opt_tracing_group = optarg; |
fac6795d DG |
3859 | break; |
3860 | case 'h': | |
3861 | usage(); | |
3862 | exit(EXIT_FAILURE); | |
3863 | case 'V': | |
3864 | fprintf(stdout, "%s\n", VERSION); | |
3865 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3866 | case 'S': |
3867 | opt_sig_parent = 1; | |
3868 | break; | |
d6f42150 | 3869 | case 'E': |
3bd1e081 | 3870 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3871 | break; |
3872 | case 'C': | |
3bd1e081 MD |
3873 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3874 | break; | |
3875 | case 'F': | |
7753dea8 | 3876 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3877 | break; |
3878 | case 'D': | |
7753dea8 MD |
3879 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3880 | break; | |
3881 | case 'H': | |
3882 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3883 | break; | |
3884 | case 'G': | |
3885 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3886 | break; |
4fba7219 DG |
3887 | case 'N': |
3888 | opt_no_kernel = 1; | |
3889 | break; | |
75462a81 DG |
3890 | case 'q': |
3891 | opt_quiet = 1; | |
3892 | break; | |
3f9947db | 3893 | case 'v': |
53086306 DG |
3894 | /* Verbose level can increase using multiple -v */ |
3895 | opt_verbose += 1; | |
3f9947db | 3896 | break; |
31f73cc9 | 3897 | case 'Z': |
3bd1e081 | 3898 | opt_verbose_consumer += 1; |
31f73cc9 | 3899 | break; |
fb09408a | 3900 | case 'u': |
fc7a59ce | 3901 | consumerd32_bin= optarg; |
ebaeda94 MD |
3902 | break; |
3903 | case 'U': | |
3904 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3905 | break; |
3906 | case 't': | |
fc7a59ce | 3907 | consumerd64_bin = optarg; |
ebaeda94 MD |
3908 | break; |
3909 | case 'T': | |
3910 | consumerd64_libdir = optarg; | |
fb09408a | 3911 | break; |
fac6795d DG |
3912 | default: |
3913 | /* Unknown option or other error. | |
3914 | * Error is printed by getopt, just return */ | |
3915 | return -1; | |
3916 | } | |
3917 | } | |
3918 | ||
3919 | return 0; | |
3920 | } | |
3921 | ||
3922 | /* | |
d063d709 | 3923 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3924 | * apps_sock - The communication socket for all UST apps. |
3925 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3926 | */ |
cf3af59e | 3927 | static int init_daemon_socket(void) |
fac6795d DG |
3928 | { |
3929 | int ret = 0; | |
3930 | mode_t old_umask; | |
3931 | ||
3932 | old_umask = umask(0); | |
3933 | ||
3934 | /* Create client tool unix socket */ | |
d6f42150 DG |
3935 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3936 | if (client_sock < 0) { | |
3937 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3938 | ret = -1; |
3939 | goto end; | |
3940 | } | |
3941 | ||
3942 | /* File permission MUST be 660 */ | |
3943 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3944 | if (ret < 0) { | |
d6f42150 | 3945 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
fac6795d DG |
3946 | perror("chmod"); |
3947 | goto end; | |
3948 | } | |
3949 | ||
3950 | /* Create the application unix socket */ | |
d6f42150 DG |
3951 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3952 | if (apps_sock < 0) { | |
3953 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3954 | ret = -1; |
3955 | goto end; | |
3956 | } | |
3957 | ||
d6f42150 | 3958 | /* File permission MUST be 666 */ |
54d01ffb DG |
3959 | ret = chmod(apps_unix_sock_path, |
3960 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3961 | if (ret < 0) { |
d6f42150 | 3962 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
fac6795d DG |
3963 | perror("chmod"); |
3964 | goto end; | |
3965 | } | |
3966 | ||
3967 | end: | |
3968 | umask(old_umask); | |
3969 | return ret; | |
3970 | } | |
3971 | ||
3972 | /* | |
54d01ffb DG |
3973 | * Check if the global socket is available, and if a daemon is answering at the |
3974 | * other side. If yes, error is returned. | |
fac6795d | 3975 | */ |
cf3af59e | 3976 | static int check_existing_daemon(void) |
fac6795d | 3977 | { |
7d8234d9 | 3978 | /* Is there anybody out there ? */ |
099e26bd | 3979 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3980 | return -EEXIST; |
099e26bd | 3981 | } |
b09c7c76 DG |
3982 | |
3983 | return 0; | |
fac6795d DG |
3984 | } |
3985 | ||
fac6795d | 3986 | /* |
d063d709 | 3987 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3988 | * |
d063d709 | 3989 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3990 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3991 | */ |
be040666 | 3992 | static int set_permissions(char *rundir) |
fac6795d DG |
3993 | { |
3994 | int ret; | |
996b65c8 | 3995 | gid_t gid; |
fac6795d | 3996 | |
996b65c8 MD |
3997 | gid = allowed_group(); |
3998 | if (gid < 0) { | |
be040666 DG |
3999 | WARN("No tracing group detected"); |
4000 | ret = 0; | |
fac6795d DG |
4001 | goto end; |
4002 | } | |
4003 | ||
d6f42150 | 4004 | /* Set lttng run dir */ |
be040666 | 4005 | ret = chown(rundir, 0, gid); |
d6f42150 | 4006 | if (ret < 0) { |
be040666 | 4007 | ERR("Unable to set group on %s", rundir); |
d6f42150 DG |
4008 | perror("chown"); |
4009 | } | |
4010 | ||
d1613cf5 JN |
4011 | /* Ensure tracing group can search the run dir */ |
4012 | ret = chmod(rundir, S_IRWXU | S_IXGRP); | |
4013 | if (ret < 0) { | |
4014 | ERR("Unable to set permissions on %s", rundir); | |
4015 | perror("chmod"); | |
4016 | } | |
4017 | ||
d6f42150 | 4018 | /* lttng client socket path */ |
996b65c8 | 4019 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4020 | if (ret < 0) { |
d6f42150 DG |
4021 | ERR("Unable to set group on %s", client_unix_sock_path); |
4022 | perror("chown"); | |
4023 | } | |
4024 | ||
3bd1e081 MD |
4025 | /* kconsumer error socket path */ |
4026 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4027 | if (ret < 0) { |
3bd1e081 MD |
4028 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
4029 | perror("chown"); | |
4030 | } | |
4031 | ||
7753dea8 MD |
4032 | /* 64-bit ustconsumer error socket path */ |
4033 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4034 | if (ret < 0) { | |
4035 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
4036 | perror("chown"); | |
4037 | } | |
4038 | ||
4039 | /* 32-bit ustconsumer compat32 error socket path */ | |
4040 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4041 | if (ret < 0) { |
7753dea8 | 4042 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
fac6795d DG |
4043 | perror("chown"); |
4044 | } | |
4045 | ||
d6f42150 | 4046 | DBG("All permissions are set"); |
e07ae692 | 4047 | |
fac6795d DG |
4048 | end: |
4049 | return ret; | |
4050 | } | |
4051 | ||
7a485870 | 4052 | /* |
d063d709 | 4053 | * Create the pipe used to wake up the kernel thread. |
7a485870 DG |
4054 | */ |
4055 | static int create_kernel_poll_pipe(void) | |
4056 | { | |
730389d9 DG |
4057 | int ret, i; |
4058 | ||
4059 | ret = pipe(kernel_poll_pipe); | |
4060 | if (ret < 0) { | |
4061 | PERROR("kernel poll pipe"); | |
4062 | goto error; | |
4063 | } | |
4064 | ||
4065 | for (i = 0; i < 2; i++) { | |
4066 | ret = fcntl(kernel_poll_pipe[i], F_SETFD, FD_CLOEXEC); | |
4067 | if (ret < 0) { | |
4068 | PERROR("fcntl kernel_poll_pipe"); | |
4069 | goto error; | |
4070 | } | |
4071 | } | |
4072 | ||
4073 | error: | |
4074 | return ret; | |
7a485870 DG |
4075 | } |
4076 | ||
099e26bd DG |
4077 | /* |
4078 | * Create the application command pipe to wake thread_manage_apps. | |
4079 | */ | |
4080 | static int create_apps_cmd_pipe(void) | |
4081 | { | |
730389d9 DG |
4082 | int ret, i; |
4083 | ||
4084 | ret = pipe(apps_cmd_pipe); | |
4085 | if (ret < 0) { | |
4086 | PERROR("apps cmd pipe"); | |
4087 | goto error; | |
4088 | } | |
4089 | ||
4090 | for (i = 0; i < 2; i++) { | |
4091 | ret = fcntl(apps_cmd_pipe[i], F_SETFD, FD_CLOEXEC); | |
4092 | if (ret < 0) { | |
4093 | PERROR("fcntl apps_cmd_pipe"); | |
4094 | goto error; | |
4095 | } | |
4096 | } | |
4097 | ||
4098 | error: | |
4099 | return ret; | |
099e26bd DG |
4100 | } |
4101 | ||
d6f42150 | 4102 | /* |
d063d709 | 4103 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4104 | */ |
67e40797 | 4105 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4106 | { |
4107 | int ret; | |
4108 | ||
67e40797 DG |
4109 | DBG3("Creating LTTng run directory: %s", rundir); |
4110 | ||
d1613cf5 | 4111 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4112 | if (ret < 0) { |
b1f11e69 | 4113 | if (errno != EEXIST) { |
67e40797 | 4114 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4115 | goto error; |
4116 | } else { | |
4117 | ret = 0; | |
4118 | } | |
d6f42150 DG |
4119 | } |
4120 | ||
4121 | error: | |
4122 | return ret; | |
4123 | } | |
4124 | ||
4125 | /* | |
d063d709 DG |
4126 | * Setup sockets and directory needed by the kconsumerd communication with the |
4127 | * session daemon. | |
d6f42150 | 4128 | */ |
67e40797 DG |
4129 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4130 | const char *rundir) | |
d6f42150 DG |
4131 | { |
4132 | int ret; | |
67e40797 | 4133 | char path[PATH_MAX]; |
d6f42150 | 4134 | |
67e40797 | 4135 | switch (consumer_data->type) { |
7753dea8 | 4136 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4137 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4138 | break; |
4139 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4140 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4141 | break; |
4142 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4143 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4144 | break; |
4145 | default: | |
4146 | ERR("Consumer type unknown"); | |
4147 | ret = -EINVAL; | |
4148 | goto error; | |
d6f42150 DG |
4149 | } |
4150 | ||
67e40797 DG |
4151 | DBG2("Creating consumer directory: %s", path); |
4152 | ||
d1613cf5 | 4153 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4154 | if (ret < 0) { |
6beb2242 | 4155 | if (errno != EEXIST) { |
3bd1e081 | 4156 | ERR("Failed to create %s", path); |
6beb2242 DG |
4157 | goto error; |
4158 | } | |
4159 | ret = 0; | |
d6f42150 DG |
4160 | } |
4161 | ||
4162 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4163 | consumer_data->err_sock = |
4164 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4165 | if (consumer_data->err_sock < 0) { | |
4166 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4167 | ret = -1; |
4168 | goto error; | |
4169 | } | |
4170 | ||
4171 | /* File permission MUST be 660 */ | |
3bd1e081 | 4172 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4173 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4174 | if (ret < 0) { |
3bd1e081 | 4175 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4176 | PERROR("chmod"); |
d6f42150 DG |
4177 | goto error; |
4178 | } | |
4179 | ||
4180 | error: | |
4181 | return ret; | |
4182 | } | |
4183 | ||
fac6795d | 4184 | /* |
d063d709 | 4185 | * Signal handler for the daemon |
cf3af59e | 4186 | * |
54d01ffb DG |
4187 | * Simply stop all worker threads, leaving main() return gracefully after |
4188 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4189 | */ |
4190 | static void sighandler(int sig) | |
4191 | { | |
4192 | switch (sig) { | |
cf3af59e | 4193 | case SIGPIPE: |
af87c45a | 4194 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4195 | return; |
4196 | case SIGINT: | |
af87c45a | 4197 | DBG("SIGINT caught"); |
cf3af59e MD |
4198 | stop_threads(); |
4199 | break; | |
4200 | case SIGTERM: | |
af87c45a | 4201 | DBG("SIGTERM caught"); |
cf3af59e MD |
4202 | stop_threads(); |
4203 | break; | |
4204 | default: | |
4205 | break; | |
fac6795d | 4206 | } |
fac6795d DG |
4207 | } |
4208 | ||
4209 | /* | |
d063d709 | 4210 | * Setup signal handler for : |
1d4b027a | 4211 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4212 | */ |
1d4b027a | 4213 | static int set_signal_handler(void) |
fac6795d | 4214 | { |
1d4b027a DG |
4215 | int ret = 0; |
4216 | struct sigaction sa; | |
4217 | sigset_t sigset; | |
fac6795d | 4218 | |
1d4b027a DG |
4219 | if ((ret = sigemptyset(&sigset)) < 0) { |
4220 | perror("sigemptyset"); | |
4221 | return ret; | |
4222 | } | |
d6f42150 | 4223 | |
1d4b027a DG |
4224 | sa.sa_handler = sighandler; |
4225 | sa.sa_mask = sigset; | |
4226 | sa.sa_flags = 0; | |
4227 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
4228 | perror("sigaction"); | |
4229 | return ret; | |
d6f42150 DG |
4230 | } |
4231 | ||
1d4b027a DG |
4232 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
4233 | perror("sigaction"); | |
4234 | return ret; | |
d6f42150 | 4235 | } |
aaf26714 | 4236 | |
1d4b027a DG |
4237 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
4238 | perror("sigaction"); | |
4239 | return ret; | |
8c0faa1d DG |
4240 | } |
4241 | ||
1d4b027a DG |
4242 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4243 | ||
4244 | return ret; | |
fac6795d DG |
4245 | } |
4246 | ||
f3ed775e | 4247 | /* |
d063d709 DG |
4248 | * Set open files limit to unlimited. This daemon can open a large number of |
4249 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4250 | */ |
4251 | static void set_ulimit(void) | |
4252 | { | |
4253 | int ret; | |
4254 | struct rlimit lim; | |
4255 | ||
a88df331 | 4256 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4257 | lim.rlim_cur = 65535; |
4258 | lim.rlim_max = 65535; | |
4259 | ||
4260 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4261 | if (ret < 0) { | |
4262 | perror("failed to set open files limit"); | |
4263 | } | |
4264 | } | |
4265 | ||
fac6795d DG |
4266 | /* |
4267 | * main | |
4268 | */ | |
4269 | int main(int argc, char **argv) | |
4270 | { | |
fac6795d DG |
4271 | int ret = 0; |
4272 | void *status; | |
b082db07 | 4273 | const char *home_path; |
fac6795d | 4274 | |
335a95b7 MD |
4275 | init_kernel_workarounds(); |
4276 | ||
f6a9efaa DG |
4277 | rcu_register_thread(); |
4278 | ||
273ea72c | 4279 | /* Create thread quit pipe */ |
cf3af59e MD |
4280 | if ((ret = init_thread_quit_pipe()) < 0) { |
4281 | goto error; | |
273ea72c DG |
4282 | } |
4283 | ||
7753dea8 | 4284 | setup_consumerd_path(); |
fb09408a | 4285 | |
fac6795d DG |
4286 | /* Parse arguments */ |
4287 | progname = argv[0]; | |
4288 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4289 | goto error; |
fac6795d DG |
4290 | } |
4291 | ||
4292 | /* Daemonize */ | |
4293 | if (opt_daemon) { | |
53094c05 DG |
4294 | ret = daemon(0, 0); |
4295 | if (ret < 0) { | |
4296 | perror("daemon"); | |
cf3af59e | 4297 | goto error; |
53094c05 | 4298 | } |
fac6795d DG |
4299 | } |
4300 | ||
4301 | /* Check if daemon is UID = 0 */ | |
4302 | is_root = !getuid(); | |
4303 | ||
fac6795d | 4304 | if (is_root) { |
990570ed | 4305 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4306 | |
4307 | /* Create global run dir with root access */ | |
4308 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4309 | if (ret < 0) { |
cf3af59e | 4310 | goto error; |
d6f42150 DG |
4311 | } |
4312 | ||
fac6795d | 4313 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4314 | snprintf(apps_unix_sock_path, PATH_MAX, |
4315 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4316 | } |
4317 | ||
4318 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4319 | snprintf(client_unix_sock_path, PATH_MAX, |
4320 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4321 | } | |
0fdd1e2c DG |
4322 | |
4323 | /* Set global SHM for ust */ | |
4324 | if (strlen(wait_shm_path) == 0) { | |
4325 | snprintf(wait_shm_path, PATH_MAX, | |
4326 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4327 | } | |
67e40797 DG |
4328 | |
4329 | /* Setup kernel consumerd path */ | |
4330 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4331 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4332 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4333 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4334 | |
4335 | DBG2("Kernel consumer err path: %s", | |
4336 | kconsumer_data.err_unix_sock_path); | |
4337 | DBG2("Kernel consumer cmd path: %s", | |
4338 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4339 | } else { |
b082db07 DG |
4340 | home_path = get_home_dir(); |
4341 | if (home_path == NULL) { | |
273ea72c DG |
4342 | /* TODO: Add --socket PATH option */ |
4343 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4344 | ret = -EPERM; |
4345 | goto error; | |
b082db07 DG |
4346 | } |
4347 | ||
67e40797 DG |
4348 | /* |
4349 | * Create rundir from home path. This will create something like | |
4350 | * $HOME/.lttng | |
4351 | */ | |
990570ed | 4352 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4353 | if (ret < 0) { |
4354 | ret = -ENOMEM; | |
4355 | goto error; | |
4356 | } | |
4357 | ||
4358 | ret = create_lttng_rundir(rundir); | |
4359 | if (ret < 0) { | |
4360 | goto error; | |
4361 | } | |
4362 | ||
fac6795d | 4363 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4364 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4365 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4366 | } |
4367 | ||
4368 | /* Set the cli tool unix socket path */ | |
4369 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4370 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4371 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4372 | } |
0fdd1e2c DG |
4373 | |
4374 | /* Set global SHM for ust */ | |
4375 | if (strlen(wait_shm_path) == 0) { | |
4376 | snprintf(wait_shm_path, PATH_MAX, | |
4377 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4378 | } | |
fac6795d DG |
4379 | } |
4380 | ||
847177cd DG |
4381 | DBG("Client socket path %s", client_unix_sock_path); |
4382 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4383 | DBG("LTTng run directory path: %s", rundir); |
4384 | ||
4385 | /* 32 bits consumerd path setup */ | |
4386 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4387 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4388 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4389 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4390 | |
4391 | DBG2("UST consumer 32 bits err path: %s", | |
4392 | ustconsumer32_data.err_unix_sock_path); | |
4393 | DBG2("UST consumer 32 bits cmd path: %s", | |
4394 | ustconsumer32_data.cmd_unix_sock_path); | |
4395 | ||
4396 | /* 64 bits consumerd path setup */ | |
4397 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4398 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4399 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4400 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4401 | |
4402 | DBG2("UST consumer 64 bits err path: %s", | |
4403 | ustconsumer64_data.err_unix_sock_path); | |
4404 | DBG2("UST consumer 64 bits cmd path: %s", | |
4405 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4406 | |
273ea72c | 4407 | /* |
7d8234d9 | 4408 | * See if daemon already exist. |
fac6795d | 4409 | */ |
7d8234d9 | 4410 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4411 | ERR("Already running daemon.\n"); |
273ea72c | 4412 | /* |
cf3af59e MD |
4413 | * We do not goto exit because we must not cleanup() |
4414 | * because a daemon is already running. | |
ab118b20 | 4415 | */ |
cf3af59e | 4416 | goto error; |
a88df331 DG |
4417 | } |
4418 | ||
54d01ffb | 4419 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4420 | |
4421 | /* | |
4422 | * These actions must be executed as root. We do that *after* setting up | |
4423 | * the sockets path because we MUST make the check for another daemon using | |
4424 | * those paths *before* trying to set the kernel consumer sockets and init | |
4425 | * kernel tracer. | |
4426 | */ | |
4427 | if (is_root) { | |
67e40797 | 4428 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4429 | if (ret < 0) { |
4430 | goto exit; | |
4431 | } | |
4432 | ||
a88df331 | 4433 | /* Setup kernel tracer */ |
4fba7219 DG |
4434 | if (!opt_no_kernel) { |
4435 | init_kernel_tracer(); | |
4436 | } | |
a88df331 DG |
4437 | |
4438 | /* Set ulimit for open files */ | |
4439 | set_ulimit(); | |
fac6795d DG |
4440 | } |
4441 | ||
67e40797 DG |
4442 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4443 | if (ret < 0) { | |
4444 | goto exit; | |
4445 | } | |
4446 | ||
4447 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4448 | if (ret < 0) { | |
4449 | goto exit; | |
4450 | } | |
4451 | ||
cf3af59e MD |
4452 | if ((ret = set_signal_handler()) < 0) { |
4453 | goto exit; | |
fac6795d DG |
4454 | } |
4455 | ||
d6f42150 | 4456 | /* Setup the needed unix socket */ |
cf3af59e MD |
4457 | if ((ret = init_daemon_socket()) < 0) { |
4458 | goto exit; | |
fac6795d DG |
4459 | } |
4460 | ||
4461 | /* Set credentials to socket */ | |
be040666 | 4462 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4463 | goto exit; |
fac6795d DG |
4464 | } |
4465 | ||
5b8719f5 DG |
4466 | /* Get parent pid if -S, --sig-parent is specified. */ |
4467 | if (opt_sig_parent) { | |
4468 | ppid = getppid(); | |
4469 | } | |
4470 | ||
7a485870 | 4471 | /* Setup the kernel pipe for waking up the kernel thread */ |
cf3af59e MD |
4472 | if ((ret = create_kernel_poll_pipe()) < 0) { |
4473 | goto exit; | |
7a485870 DG |
4474 | } |
4475 | ||
099e26bd DG |
4476 | /* Setup the thread apps communication pipe. */ |
4477 | if ((ret = create_apps_cmd_pipe()) < 0) { | |
4478 | goto exit; | |
4479 | } | |
4480 | ||
4481 | /* Init UST command queue. */ | |
4482 | cds_wfq_init(&ust_cmd_queue.queue); | |
4483 | ||
f6a9efaa DG |
4484 | /* Init UST app hash table */ |
4485 | ust_app_ht_alloc(); | |
4486 | ||
273ea72c | 4487 | /* |
54d01ffb DG |
4488 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4489 | * statically declared in session.c | |
273ea72c | 4490 | */ |
54d01ffb | 4491 | session_list_ptr = session_get_list(); |
b5541356 | 4492 | |
5eb91c98 DG |
4493 | /* Set up max poll set size */ |
4494 | lttng_poll_set_max_size(); | |
4495 | ||
cf3af59e | 4496 | /* Create thread to manage the client socket */ |
099e26bd DG |
4497 | ret = pthread_create(&client_thread, NULL, |
4498 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4499 | if (ret != 0) { |
099e26bd | 4500 | perror("pthread_create clients"); |
cf3af59e MD |
4501 | goto exit_client; |
4502 | } | |
fac6795d | 4503 | |
099e26bd DG |
4504 | /* Create thread to dispatch registration */ |
4505 | ret = pthread_create(&dispatch_thread, NULL, | |
4506 | thread_dispatch_ust_registration, (void *) NULL); | |
4507 | if (ret != 0) { | |
4508 | perror("pthread_create dispatch"); | |
4509 | goto exit_dispatch; | |
4510 | } | |
4511 | ||
4512 | /* Create thread to manage application registration. */ | |
4513 | ret = pthread_create(®_apps_thread, NULL, | |
4514 | thread_registration_apps, (void *) NULL); | |
4515 | if (ret != 0) { | |
4516 | perror("pthread_create registration"); | |
4517 | goto exit_reg_apps; | |
4518 | } | |
4519 | ||
cf3af59e | 4520 | /* Create thread to manage application socket */ |
54d01ffb DG |
4521 | ret = pthread_create(&apps_thread, NULL, |
4522 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4523 | if (ret != 0) { |
099e26bd | 4524 | perror("pthread_create apps"); |
cf3af59e MD |
4525 | goto exit_apps; |
4526 | } | |
fac6795d | 4527 | |
cf3af59e | 4528 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4529 | ret = pthread_create(&kernel_thread, NULL, |
4530 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4531 | if (ret != 0) { |
099e26bd | 4532 | perror("pthread_create kernel"); |
cf3af59e MD |
4533 | goto exit_kernel; |
4534 | } | |
7a485870 | 4535 | |
cf3af59e MD |
4536 | ret = pthread_join(kernel_thread, &status); |
4537 | if (ret != 0) { | |
4538 | perror("pthread_join"); | |
4539 | goto error; /* join error, exit without cleanup */ | |
fac6795d DG |
4540 | } |
4541 | ||
cf3af59e MD |
4542 | exit_kernel: |
4543 | ret = pthread_join(apps_thread, &status); | |
4544 | if (ret != 0) { | |
4545 | perror("pthread_join"); | |
4546 | goto error; /* join error, exit without cleanup */ | |
4547 | } | |
fac6795d | 4548 | |
cf3af59e | 4549 | exit_apps: |
099e26bd DG |
4550 | ret = pthread_join(reg_apps_thread, &status); |
4551 | if (ret != 0) { | |
4552 | perror("pthread_join"); | |
4553 | goto error; /* join error, exit without cleanup */ | |
4554 | } | |
4555 | ||
4556 | exit_reg_apps: | |
4557 | ret = pthread_join(dispatch_thread, &status); | |
4558 | if (ret != 0) { | |
4559 | perror("pthread_join"); | |
4560 | goto error; /* join error, exit without cleanup */ | |
4561 | } | |
4562 | ||
4563 | exit_dispatch: | |
cf3af59e MD |
4564 | ret = pthread_join(client_thread, &status); |
4565 | if (ret != 0) { | |
4566 | perror("pthread_join"); | |
4567 | goto error; /* join error, exit without cleanup */ | |
4568 | } | |
4569 | ||
3bd1e081 | 4570 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4571 | if (ret != 0) { |
3bd1e081 | 4572 | perror("join_consumer"); |
cf3af59e MD |
4573 | goto error; /* join error, exit without cleanup */ |
4574 | } | |
a88df331 | 4575 | |
cf3af59e | 4576 | exit_client: |
a88df331 | 4577 | exit: |
cf3af59e MD |
4578 | /* |
4579 | * cleanup() is called when no other thread is running. | |
4580 | */ | |
f6a9efaa | 4581 | rcu_thread_online(); |
cf3af59e | 4582 | cleanup(); |
f6a9efaa DG |
4583 | rcu_thread_offline(); |
4584 | rcu_unregister_thread(); | |
67e40797 | 4585 | if (!ret) { |
cf3af59e | 4586 | exit(EXIT_SUCCESS); |
67e40797 | 4587 | } |
cf3af59e | 4588 | error: |
5e16da05 | 4589 | exit(EXIT_FAILURE); |
fac6795d | 4590 | } |