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 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
91d76f53 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 | 35 | #include <sys/wait.h> |
5c827ce0 | 36 | #include <urcu/uatomic.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> | |
50c8f484 | 46 | #include <common/futex.h> |
fac6795d | 47 | |
10a8a223 | 48 | #include "lttng-sessiond.h" |
54d01ffb | 49 | #include "channel.h" |
099e26bd | 50 | #include "context.h" |
54d01ffb | 51 | #include "event.h" |
4771f025 | 52 | #include "kernel.h" |
f1e16794 | 53 | #include "kernel-consumer.h" |
096102bd | 54 | #include "modprobe.h" |
0fdd1e2c | 55 | #include "shm.h" |
1e307fab | 56 | #include "ust-ctl.h" |
8e68d1c8 | 57 | #include "utils.h" |
4063050c | 58 | #include "fd-limit.h" |
fac6795d | 59 | |
ebaeda94 MD |
60 | #define CONSUMERD_FILE "lttng-consumerd" |
61 | ||
75462a81 | 62 | /* Const values */ |
686204ab | 63 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 64 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
65 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
66 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
67 | ||
fac6795d DG |
68 | const char *progname; |
69 | const char *opt_tracing_group; | |
5b8719f5 | 70 | static int opt_sig_parent; |
97e19046 | 71 | static int opt_verbose_consumer; |
fac6795d | 72 | static int opt_daemon; |
4fba7219 | 73 | static int opt_no_kernel; |
fac6795d | 74 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 75 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 76 | static char *rundir; |
3bd1e081 MD |
77 | |
78 | /* Consumer daemon specific control data */ | |
79 | static struct consumer_data kconsumer_data = { | |
80 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
81 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
82 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
83 | .err_sock = -1, |
84 | .cmd_sock = -1, | |
3bd1e081 | 85 | }; |
7753dea8 MD |
86 | static struct consumer_data ustconsumer64_data = { |
87 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
88 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
89 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
90 | .err_sock = -1, |
91 | .cmd_sock = -1, | |
7753dea8 MD |
92 | }; |
93 | static struct consumer_data ustconsumer32_data = { | |
94 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
95 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
96 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
97 | .err_sock = -1, |
98 | .cmd_sock = -1, | |
3bd1e081 MD |
99 | }; |
100 | ||
099e26bd | 101 | static int dispatch_thread_exit; |
fac6795d | 102 | |
54d01ffb DG |
103 | /* Global application Unix socket path */ |
104 | static char apps_unix_sock_path[PATH_MAX]; | |
105 | /* Global client Unix socket path */ | |
106 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
107 | /* global wait shm path for UST */ |
108 | static char wait_shm_path[PATH_MAX]; | |
fac6795d | 109 | |
1d4b027a | 110 | /* Sockets and FDs */ |
a4b35e07 MD |
111 | static int client_sock = -1; |
112 | static int apps_sock = -1; | |
113 | static int kernel_tracer_fd = -1; | |
76d7553f | 114 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 115 | |
273ea72c DG |
116 | /* |
117 | * Quit pipe for all threads. This permits a single cancellation point | |
118 | * for all threads when receiving an event on the pipe. | |
119 | */ | |
76d7553f | 120 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 121 | |
099e26bd DG |
122 | /* |
123 | * This pipe is used to inform the thread managing application communication | |
124 | * that a command is queued and ready to be processed. | |
125 | */ | |
76d7553f | 126 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 127 | |
1d4b027a | 128 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 129 | static pthread_t apps_thread; |
099e26bd | 130 | static pthread_t reg_apps_thread; |
1d4b027a | 131 | static pthread_t client_thread; |
7a485870 | 132 | static pthread_t kernel_thread; |
099e26bd | 133 | static pthread_t dispatch_thread; |
5eb91c98 | 134 | |
fac6795d | 135 | |
099e26bd DG |
136 | /* |
137 | * UST registration command queue. This queue is tied with a futex and uses a N | |
138 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
139 | * | |
140 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
141 | * this queue and the wait/wake scheme. | |
142 | */ | |
143 | static struct ust_cmd_queue ust_cmd_queue; | |
144 | ||
b5541356 DG |
145 | /* |
146 | * Pointer initialized before thread creation. | |
147 | * | |
148 | * This points to the tracing session list containing the session count and a | |
149 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
150 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 151 | * |
d063d709 | 152 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 153 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
154 | */ |
155 | static struct ltt_session_list *session_list_ptr; | |
156 | ||
7753dea8 MD |
157 | int ust_consumerd64_fd = -1; |
158 | int ust_consumerd32_fd = -1; | |
159 | ||
fb6f1fa2 YB |
160 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
161 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
162 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
163 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 164 | |
5c827ce0 DG |
165 | /* |
166 | * Consumer daemon state which is changed when spawning it, killing it or in | |
167 | * case of a fatal error. | |
168 | */ | |
169 | enum consumerd_state { | |
170 | CONSUMER_STARTED = 1, | |
171 | CONSUMER_STOPPED = 2, | |
172 | CONSUMER_ERROR = 3, | |
173 | }; | |
174 | ||
175 | /* | |
176 | * This consumer daemon state is used to validate if a client command will be | |
177 | * able to reach the consumer. If not, the client is informed. For instance, | |
178 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
179 | * error to the client. | |
180 | * | |
181 | * The following example shows a possible race condition of this scheme: | |
182 | * | |
183 | * consumer thread error happens | |
184 | * client cmd arrives | |
185 | * client cmd checks state -> still OK | |
186 | * consumer thread exit, sets error | |
187 | * client cmd try to talk to consumer | |
188 | * ... | |
189 | * | |
190 | * However, since the consumer is a different daemon, we have no way of making | |
191 | * sure the command will reach it safely even with this state flag. This is why | |
192 | * we consider that up to the state validation during command processing, the | |
193 | * command is safe. After that, we can not guarantee the correctness of the | |
194 | * client request vis-a-vis the consumer. | |
195 | */ | |
196 | static enum consumerd_state ust_consumerd_state; | |
197 | static enum consumerd_state kernel_consumerd_state; | |
198 | ||
fb09408a | 199 | static |
7753dea8 | 200 | void setup_consumerd_path(void) |
fb09408a | 201 | { |
fc7a59ce | 202 | const char *bin, *libdir; |
fb09408a | 203 | |
7753dea8 MD |
204 | /* |
205 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
206 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
207 | * has not been defined. | |
7753dea8 | 208 | */ |
ebaeda94 | 209 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
210 | if (!consumerd32_bin[0]) { |
211 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
212 | } |
213 | if (!consumerd32_libdir[0]) { | |
214 | consumerd32_libdir = INSTALL_LIB_PATH; | |
215 | } | |
216 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
217 | if (!consumerd64_bin[0]) { |
218 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 219 | } |
ebaeda94 MD |
220 | if (!consumerd64_libdir[0]) { |
221 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
222 | } |
223 | #else | |
224 | #error "Unknown bitness" | |
225 | #endif | |
226 | ||
fb09408a MD |
227 | /* |
228 | * runtime env. var. overrides the build default. | |
229 | */ | |
fc7a59ce AM |
230 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
231 | if (bin) { | |
232 | consumerd32_bin = bin; | |
7753dea8 | 233 | } |
fc7a59ce AM |
234 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
235 | if (bin) { | |
236 | consumerd64_bin = bin; | |
ebaeda94 | 237 | } |
72f579ee | 238 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
239 | if (libdir) { |
240 | consumerd32_libdir = libdir; | |
241 | } | |
72f579ee | 242 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
243 | if (libdir) { |
244 | consumerd64_libdir = libdir; | |
fb09408a MD |
245 | } |
246 | } | |
247 | ||
5eb91c98 DG |
248 | /* |
249 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
250 | */ | |
251 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
252 | unsigned int size) | |
253 | { | |
254 | int ret; | |
255 | ||
256 | if (events == NULL || size == 0) { | |
257 | ret = -1; | |
258 | goto error; | |
259 | } | |
260 | ||
261 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
262 | if (ret < 0) { | |
263 | goto error; | |
264 | } | |
265 | ||
266 | /* Add quit pipe */ | |
267 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
268 | if (ret < 0) { | |
269 | goto error; | |
270 | } | |
271 | ||
272 | return 0; | |
273 | ||
274 | error: | |
275 | return ret; | |
276 | } | |
277 | ||
278 | /* | |
279 | * Check if the thread quit pipe was triggered. | |
280 | * | |
281 | * Return 1 if it was triggered else 0; | |
282 | */ | |
283 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
284 | { | |
285 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
286 | return 1; | |
287 | } | |
288 | ||
289 | return 0; | |
290 | } | |
291 | ||
0fdd1e2c DG |
292 | /* |
293 | * Return group ID of the tracing group or -1 if not found. | |
294 | */ | |
996b65c8 MD |
295 | static gid_t allowed_group(void) |
296 | { | |
297 | struct group *grp; | |
298 | ||
274e143b MD |
299 | if (opt_tracing_group) { |
300 | grp = getgrnam(opt_tracing_group); | |
301 | } else { | |
302 | grp = getgrnam(default_tracing_group); | |
303 | } | |
996b65c8 MD |
304 | if (!grp) { |
305 | return -1; | |
306 | } else { | |
307 | return grp->gr_gid; | |
308 | } | |
309 | } | |
310 | ||
273ea72c | 311 | /* |
5eb91c98 | 312 | * Init thread quit pipe. |
273ea72c DG |
313 | * |
314 | * Return -1 on error or 0 if all pipes are created. | |
315 | */ | |
316 | static int init_thread_quit_pipe(void) | |
317 | { | |
730389d9 | 318 | int ret, i; |
273ea72c | 319 | |
730389d9 | 320 | ret = pipe(thread_quit_pipe); |
273ea72c | 321 | if (ret < 0) { |
730389d9 | 322 | PERROR("thread quit pipe"); |
273ea72c DG |
323 | goto error; |
324 | } | |
325 | ||
730389d9 DG |
326 | for (i = 0; i < 2; i++) { |
327 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
328 | if (ret < 0) { | |
329 | PERROR("fcntl"); | |
330 | goto error; | |
331 | } | |
332 | } | |
333 | ||
273ea72c DG |
334 | error: |
335 | return ret; | |
336 | } | |
337 | ||
fac6795d | 338 | /* |
d063d709 DG |
339 | * Complete teardown of a kernel session. This free all data structure related |
340 | * to a kernel session and update counter. | |
fac6795d | 341 | */ |
1d4b027a | 342 | static void teardown_kernel_session(struct ltt_session *session) |
fac6795d | 343 | { |
8f7a84dd | 344 | if (!session->kernel_session) { |
99bab54f | 345 | DBG3("No kernel session when tearing down session"); |
84ea9c99 | 346 | return; |
8f7a84dd DG |
347 | } |
348 | ||
84ea9c99 | 349 | DBG("Tearing down kernel session"); |
d9800920 | 350 | |
84ea9c99 MD |
351 | /* |
352 | * If a custom kernel consumer was registered, close the socket before | |
353 | * tearing down the complete kernel session structure | |
354 | */ | |
03550b58 MD |
355 | if (kconsumer_data.cmd_sock >= 0 && |
356 | session->kernel_session->consumer_fd != kconsumer_data.cmd_sock) { | |
84ea9c99 | 357 | lttcomm_close_unix_sock(session->kernel_session->consumer_fd); |
fac6795d | 358 | } |
84ea9c99 MD |
359 | |
360 | trace_kernel_destroy_session(session->kernel_session); | |
fac6795d DG |
361 | } |
362 | ||
f6a9efaa DG |
363 | /* |
364 | * Complete teardown of all UST sessions. This will free everything on his path | |
365 | * and destroy the core essence of all ust sessions :) | |
366 | */ | |
367 | static void teardown_ust_session(struct ltt_session *session) | |
368 | { | |
84cd17c6 MD |
369 | int ret; |
370 | ||
8f7a84dd | 371 | if (!session->ust_session) { |
99bab54f | 372 | DBG3("No UST session when tearing down session"); |
f470a390 | 373 | return; |
8f7a84dd DG |
374 | } |
375 | ||
84ea9c99 | 376 | DBG("Tearing down UST session(s)"); |
8f7a84dd | 377 | |
84cd17c6 MD |
378 | ret = ust_app_destroy_trace_all(session->ust_session); |
379 | if (ret) { | |
380 | ERR("Error in ust_app_destroy_trace_all"); | |
381 | } | |
8f7a84dd | 382 | |
f6a9efaa DG |
383 | trace_ust_destroy_session(session->ust_session); |
384 | } | |
385 | ||
099e26bd DG |
386 | /* |
387 | * Stop all threads by closing the thread quit pipe. | |
388 | */ | |
cf3af59e MD |
389 | static void stop_threads(void) |
390 | { | |
5eb91c98 DG |
391 | int ret; |
392 | ||
cf3af59e MD |
393 | /* Stopping all threads */ |
394 | DBG("Terminating all threads"); | |
54d01ffb | 395 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
396 | if (ret < 0) { |
397 | ERR("write error on thread quit pipe"); | |
398 | } | |
399 | ||
099e26bd DG |
400 | /* Dispatch thread */ |
401 | dispatch_thread_exit = 1; | |
402 | futex_nto1_wake(&ust_cmd_queue.futex); | |
cf3af59e MD |
403 | } |
404 | ||
fac6795d | 405 | /* |
d063d709 | 406 | * Cleanup the daemon |
fac6795d | 407 | */ |
cf3af59e | 408 | static void cleanup(void) |
fac6795d | 409 | { |
ef599319 | 410 | int ret; |
1d4b027a | 411 | char *cmd; |
af9737e9 | 412 | struct ltt_session *sess, *stmp; |
fac6795d | 413 | |
1d4b027a | 414 | DBG("Cleaning up"); |
e07ae692 | 415 | |
67e40797 DG |
416 | DBG("Removing %s directory", rundir); |
417 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
418 | if (ret < 0) { | |
419 | ERR("asprintf failed. Something is really wrong!"); | |
420 | } | |
5461b305 | 421 | |
67e40797 DG |
422 | /* Remove lttng run directory */ |
423 | ret = system(cmd); | |
424 | if (ret < 0) { | |
425 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 426 | } |
67e40797 | 427 | free(cmd); |
5461b305 | 428 | |
99bab54f | 429 | DBG("Cleaning up all sessions"); |
fac6795d | 430 | |
b5541356 | 431 | /* Destroy session list mutex */ |
273ea72c DG |
432 | if (session_list_ptr != NULL) { |
433 | pthread_mutex_destroy(&session_list_ptr->lock); | |
434 | ||
435 | /* Cleanup ALL session */ | |
54d01ffb DG |
436 | cds_list_for_each_entry_safe(sess, stmp, |
437 | &session_list_ptr->head, list) { | |
273ea72c | 438 | teardown_kernel_session(sess); |
f6a9efaa DG |
439 | teardown_ust_session(sess); |
440 | free(sess); | |
273ea72c DG |
441 | } |
442 | } | |
443 | ||
099e26bd | 444 | DBG("Closing all UST sockets"); |
56fff090 | 445 | ust_app_clean_list(); |
099e26bd | 446 | |
3bd1e081 | 447 | pthread_mutex_destroy(&kconsumer_data.pid_mutex); |
b5541356 | 448 | |
4fba7219 DG |
449 | if (is_root && !opt_no_kernel) { |
450 | DBG2("Closing kernel fd"); | |
a4b35e07 | 451 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
452 | ret = close(kernel_tracer_fd); |
453 | if (ret) { | |
454 | PERROR("close"); | |
455 | } | |
a4b35e07 | 456 | } |
2f50c8a3 | 457 | DBG("Unloading kernel modules"); |
096102bd | 458 | modprobe_remove_lttng_all(); |
2f50c8a3 | 459 | } |
ef599319 DG |
460 | utils_close_pipe(kernel_poll_pipe); |
461 | utils_close_pipe(thread_quit_pipe); | |
462 | utils_close_pipe(apps_cmd_pipe); | |
421cb601 DG |
463 | |
464 | /* <fun> */ | |
f56a39af | 465 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
466 | "Matthew, BEET driven development works!%c[%dm", |
467 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
468 | /* </fun> */ | |
fac6795d DG |
469 | } |
470 | ||
e065084a | 471 | /* |
d063d709 | 472 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 473 | * |
d063d709 | 474 | * Return lttcomm error code. |
e065084a DG |
475 | */ |
476 | static int send_unix_sock(int sock, void *buf, size_t len) | |
477 | { | |
478 | /* Check valid length */ | |
479 | if (len <= 0) { | |
480 | return -1; | |
481 | } | |
482 | ||
483 | return lttcomm_send_unix_sock(sock, buf, len); | |
484 | } | |
485 | ||
5461b305 | 486 | /* |
d063d709 | 487 | * Free memory of a command context structure. |
5461b305 | 488 | */ |
a2fb29a5 | 489 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 490 | { |
a2fb29a5 DG |
491 | DBG("Clean command context structure"); |
492 | if (*cmd_ctx) { | |
493 | if ((*cmd_ctx)->llm) { | |
494 | free((*cmd_ctx)->llm); | |
5461b305 | 495 | } |
a2fb29a5 DG |
496 | if ((*cmd_ctx)->lsm) { |
497 | free((*cmd_ctx)->lsm); | |
5461b305 | 498 | } |
a2fb29a5 DG |
499 | free(*cmd_ctx); |
500 | *cmd_ctx = NULL; | |
5461b305 DG |
501 | } |
502 | } | |
503 | ||
fac6795d | 504 | /* |
0fdd1e2c | 505 | * Notify UST applications using the shm mmap futex. |
fac6795d | 506 | */ |
0fdd1e2c | 507 | static int notify_ust_apps(int active) |
fac6795d | 508 | { |
0fdd1e2c | 509 | char *wait_shm_mmap; |
fac6795d | 510 | |
0fdd1e2c | 511 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 512 | |
0fdd1e2c DG |
513 | /* See shm.c for this call implying mmap, shm and futex calls */ |
514 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
515 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
516 | goto error; |
517 | } | |
518 | ||
0fdd1e2c DG |
519 | /* Wake waiting process */ |
520 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
521 | ||
522 | /* Apps notified successfully */ | |
523 | return 0; | |
fac6795d DG |
524 | |
525 | error: | |
0fdd1e2c | 526 | return -1; |
fac6795d DG |
527 | } |
528 | ||
e065084a | 529 | /* |
d063d709 DG |
530 | * Setup the outgoing data buffer for the response (llm) by allocating the |
531 | * right amount of memory and copying the original information from the lsm | |
532 | * structure. | |
ca95a216 | 533 | * |
d063d709 | 534 | * Return total size of the buffer pointed by buf. |
ca95a216 | 535 | */ |
5461b305 | 536 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 537 | { |
f3ed775e | 538 | int ret, buf_size; |
ca95a216 | 539 | |
f3ed775e | 540 | buf_size = size; |
5461b305 | 541 | |
ba7f0ae5 | 542 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 543 | if (cmd_ctx->llm == NULL) { |
76d7553f | 544 | PERROR("zmalloc"); |
5461b305 | 545 | ret = -ENOMEM; |
ca95a216 DG |
546 | goto error; |
547 | } | |
548 | ||
5461b305 DG |
549 | /* Copy common data */ |
550 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 551 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 552 | |
5461b305 DG |
553 | cmd_ctx->llm->data_size = size; |
554 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
555 | ||
ca95a216 DG |
556 | return buf_size; |
557 | ||
558 | error: | |
559 | return ret; | |
560 | } | |
561 | ||
7a485870 | 562 | /* |
5eb91c98 | 563 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 564 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 565 | */ |
5eb91c98 | 566 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 567 | { |
5eb91c98 | 568 | int ret; |
7a485870 DG |
569 | struct ltt_session *session; |
570 | struct ltt_kernel_channel *channel; | |
571 | ||
5eb91c98 | 572 | DBG("Updating kernel poll set"); |
7a485870 | 573 | |
54d01ffb | 574 | session_lock_list(); |
b5541356 | 575 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 576 | session_lock(session); |
7a485870 | 577 | if (session->kernel_session == NULL) { |
54d01ffb | 578 | session_unlock(session); |
7a485870 DG |
579 | continue; |
580 | } | |
7a485870 | 581 | |
54d01ffb DG |
582 | cds_list_for_each_entry(channel, |
583 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
584 | /* Add channel fd to the kernel poll set */ |
585 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
586 | if (ret < 0) { | |
54d01ffb | 587 | session_unlock(session); |
5eb91c98 DG |
588 | goto error; |
589 | } | |
590 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 591 | } |
54d01ffb | 592 | session_unlock(session); |
7a485870 | 593 | } |
54d01ffb | 594 | session_unlock_list(); |
7a485870 | 595 | |
5eb91c98 | 596 | return 0; |
7a485870 DG |
597 | |
598 | error: | |
54d01ffb | 599 | session_unlock_list(); |
7a485870 DG |
600 | return -1; |
601 | } | |
602 | ||
603 | /* | |
54d01ffb | 604 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 605 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 606 | * |
d063d709 | 607 | * Useful for CPU hotplug feature. |
7a485870 | 608 | */ |
2bdd86d4 | 609 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
610 | { |
611 | int ret = 0; | |
612 | struct ltt_session *session; | |
613 | struct ltt_kernel_channel *channel; | |
614 | ||
615 | DBG("Updating kernel streams for channel fd %d", fd); | |
616 | ||
54d01ffb | 617 | session_lock_list(); |
b5541356 | 618 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 619 | session_lock(session); |
7a485870 | 620 | if (session->kernel_session == NULL) { |
54d01ffb | 621 | session_unlock(session); |
7a485870 DG |
622 | continue; |
623 | } | |
d9800920 | 624 | |
03550b58 MD |
625 | /* This is not suppose to be -1 but this is an extra security check */ |
626 | if (session->kernel_session->consumer_fd < 0) { | |
3bd1e081 | 627 | session->kernel_session->consumer_fd = consumer_data->cmd_sock; |
d9800920 DG |
628 | } |
629 | ||
5eb91c98 DG |
630 | cds_list_for_each_entry(channel, |
631 | &session->kernel_session->channel_list.head, list) { | |
7a485870 DG |
632 | if (channel->fd == fd) { |
633 | DBG("Channel found, updating kernel streams"); | |
634 | ret = kernel_open_channel_stream(channel); | |
635 | if (ret < 0) { | |
b3c750d2 | 636 | goto error; |
7a485870 | 637 | } |
d9800920 | 638 | |
7a485870 | 639 | /* |
5eb91c98 DG |
640 | * Have we already sent fds to the consumer? If yes, it means |
641 | * that tracing is started so it is safe to send our updated | |
642 | * stream fds. | |
7a485870 | 643 | */ |
3bd1e081 | 644 | if (session->kernel_session->consumer_fds_sent == 1) { |
f1e16794 | 645 | ret = kernel_consumer_send_channel_stream(consumer_data, |
97b6ffd0 | 646 | channel, session->uid, session->gid); |
7a485870 | 647 | if (ret < 0) { |
b3c750d2 | 648 | goto error; |
7a485870 DG |
649 | } |
650 | } | |
b3c750d2 | 651 | goto error; |
7a485870 DG |
652 | } |
653 | } | |
54d01ffb | 654 | session_unlock(session); |
7a485870 | 655 | } |
54d01ffb | 656 | session_unlock_list(); |
b3c750d2 | 657 | return ret; |
7a485870 | 658 | |
b3c750d2 | 659 | error: |
54d01ffb DG |
660 | session_unlock(session); |
661 | session_unlock_list(); | |
7a485870 DG |
662 | return ret; |
663 | } | |
664 | ||
487cf67c DG |
665 | /* |
666 | * For each tracing session, update newly registered apps. | |
667 | */ | |
668 | static void update_ust_app(int app_sock) | |
669 | { | |
670 | struct ltt_session *sess, *stmp; | |
671 | ||
4ee14516 DG |
672 | session_lock_list(); |
673 | ||
487cf67c DG |
674 | /* For all tracing session(s) */ |
675 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 676 | session_lock(sess); |
421cb601 DG |
677 | if (sess->ust_session) { |
678 | ust_app_global_update(sess->ust_session, app_sock); | |
679 | } | |
4ee14516 | 680 | session_unlock(sess); |
487cf67c | 681 | } |
4ee14516 DG |
682 | |
683 | session_unlock_list(); | |
487cf67c DG |
684 | } |
685 | ||
7a485870 | 686 | /* |
d063d709 | 687 | * This thread manage event coming from the kernel. |
7a485870 | 688 | * |
d063d709 DG |
689 | * Features supported in this thread: |
690 | * -) CPU Hotplug | |
7a485870 DG |
691 | */ |
692 | static void *thread_manage_kernel(void *data) | |
693 | { | |
5eb91c98 DG |
694 | int ret, i, pollfd, update_poll_flag = 1; |
695 | uint32_t revents, nb_fd; | |
7a485870 | 696 | char tmp; |
5eb91c98 | 697 | struct lttng_poll_event events; |
7a485870 DG |
698 | |
699 | DBG("Thread manage kernel started"); | |
700 | ||
5eb91c98 DG |
701 | ret = create_thread_poll_set(&events, 2); |
702 | if (ret < 0) { | |
76d7553f | 703 | goto error_poll_create; |
5eb91c98 DG |
704 | } |
705 | ||
706 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
707 | if (ret < 0) { | |
708 | goto error; | |
709 | } | |
710 | ||
7a485870 DG |
711 | while (1) { |
712 | if (update_poll_flag == 1) { | |
5f822d0a DG |
713 | /* |
714 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
715 | * quit pipe and the kernel pipe. | |
716 | */ | |
717 | events.nb_fd = 2; | |
718 | ||
5eb91c98 DG |
719 | ret = update_kernel_poll(&events); |
720 | if (ret < 0) { | |
7a485870 DG |
721 | goto error; |
722 | } | |
723 | update_poll_flag = 0; | |
724 | } | |
725 | ||
5eb91c98 DG |
726 | nb_fd = LTTNG_POLL_GETNB(&events); |
727 | ||
728 | DBG("Thread kernel polling on %d fds", nb_fd); | |
729 | ||
730 | /* Zeroed the poll events */ | |
731 | lttng_poll_reset(&events); | |
7a485870 DG |
732 | |
733 | /* Poll infinite value of time */ | |
88f2b785 | 734 | restart: |
5eb91c98 | 735 | ret = lttng_poll_wait(&events, -1); |
7a485870 | 736 | if (ret < 0) { |
88f2b785 MD |
737 | /* |
738 | * Restart interrupted system call. | |
739 | */ | |
740 | if (errno == EINTR) { | |
741 | goto restart; | |
742 | } | |
7a485870 DG |
743 | goto error; |
744 | } else if (ret == 0) { | |
745 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
746 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
747 | "This should not have happened! Continuing..."); | |
7a485870 DG |
748 | continue; |
749 | } | |
750 | ||
5eb91c98 DG |
751 | for (i = 0; i < nb_fd; i++) { |
752 | /* Fetch once the poll data */ | |
753 | revents = LTTNG_POLL_GETEV(&events, i); | |
754 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 755 | |
5eb91c98 DG |
756 | /* Thread quit pipe has been closed. Killing thread. */ |
757 | ret = check_thread_quit_pipe(pollfd, revents); | |
758 | if (ret) { | |
759 | goto error; | |
760 | } | |
7a485870 | 761 | |
5eb91c98 DG |
762 | /* Check for data on kernel pipe */ |
763 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
764 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
765 | update_poll_flag = 1; | |
766 | continue; | |
767 | } else { | |
768 | /* | |
769 | * New CPU detected by the kernel. Adding kernel stream to | |
770 | * kernel session and updating the kernel consumer | |
771 | */ | |
772 | if (revents & LPOLLIN) { | |
2bdd86d4 | 773 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
774 | if (ret < 0) { |
775 | continue; | |
776 | } | |
777 | break; | |
778 | /* | |
779 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
780 | * and unregister kernel stream at this point. | |
781 | */ | |
7a485870 | 782 | } |
7a485870 DG |
783 | } |
784 | } | |
785 | } | |
786 | ||
787 | error: | |
5eb91c98 | 788 | lttng_poll_clean(&events); |
76d7553f MD |
789 | error_poll_create: |
790 | DBG("Kernel thread dying"); | |
7a485870 DG |
791 | return NULL; |
792 | } | |
793 | ||
1d4b027a | 794 | /* |
3bd1e081 | 795 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 796 | */ |
3bd1e081 | 797 | static void *thread_manage_consumer(void *data) |
1d4b027a | 798 | { |
76d7553f | 799 | int sock = -1, i, ret, pollfd; |
5eb91c98 | 800 | uint32_t revents, nb_fd; |
1d4b027a | 801 | enum lttcomm_return_code code; |
5eb91c98 | 802 | struct lttng_poll_event events; |
3bd1e081 | 803 | struct consumer_data *consumer_data = data; |
1d4b027a | 804 | |
3bd1e081 | 805 | DBG("[thread] Manage consumer started"); |
1d4b027a | 806 | |
3bd1e081 | 807 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); |
1d4b027a | 808 | if (ret < 0) { |
76d7553f | 809 | goto error_listen; |
1d4b027a DG |
810 | } |
811 | ||
5eb91c98 DG |
812 | /* |
813 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
814 | * Nothing more will be added to this poll set. | |
815 | */ | |
816 | ret = create_thread_poll_set(&events, 2); | |
817 | if (ret < 0) { | |
76d7553f | 818 | goto error_poll; |
5eb91c98 | 819 | } |
273ea72c | 820 | |
3bd1e081 | 821 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
822 | if (ret < 0) { |
823 | goto error; | |
824 | } | |
825 | ||
826 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c DG |
827 | |
828 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 829 | restart: |
5eb91c98 | 830 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 831 | if (ret < 0) { |
88f2b785 MD |
832 | /* |
833 | * Restart interrupted system call. | |
834 | */ | |
835 | if (errno == EINTR) { | |
836 | goto restart; | |
837 | } | |
273ea72c DG |
838 | goto error; |
839 | } | |
840 | ||
5eb91c98 DG |
841 | for (i = 0; i < nb_fd; i++) { |
842 | /* Fetch once the poll data */ | |
843 | revents = LTTNG_POLL_GETEV(&events, i); | |
844 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
845 | ||
846 | /* Thread quit pipe has been closed. Killing thread. */ | |
847 | ret = check_thread_quit_pipe(pollfd, revents); | |
848 | if (ret) { | |
849 | goto error; | |
850 | } | |
851 | ||
852 | /* Event on the registration socket */ | |
3bd1e081 | 853 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 854 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 855 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
856 | goto error; |
857 | } | |
858 | } | |
273ea72c DG |
859 | } |
860 | ||
3bd1e081 | 861 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
862 | if (sock < 0) { |
863 | goto error; | |
864 | } | |
865 | ||
3bd1e081 | 866 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 867 | |
712ea556 | 868 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
869 | ret = lttcomm_recv_unix_sock(sock, &code, |
870 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
871 | if (ret <= 0) { |
872 | goto error; | |
873 | } | |
874 | ||
3bd1e081 MD |
875 | if (code == CONSUMERD_COMMAND_SOCK_READY) { |
876 | consumer_data->cmd_sock = | |
877 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
878 | if (consumer_data->cmd_sock < 0) { | |
879 | sem_post(&consumer_data->sem); | |
48842b30 | 880 | PERROR("consumer connect"); |
1d4b027a DG |
881 | goto error; |
882 | } | |
883 | /* Signal condition to tell that the kconsumerd is ready */ | |
3bd1e081 MD |
884 | sem_post(&consumer_data->sem); |
885 | DBG("consumer command socket ready"); | |
1d4b027a | 886 | } else { |
3bd1e081 | 887 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
888 | lttcomm_get_readable_code(-code)); |
889 | goto error; | |
890 | } | |
891 | ||
54d01ffb | 892 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 893 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 894 | if (ret < 0) { |
72079cae DG |
895 | goto error; |
896 | } | |
897 | ||
5eb91c98 DG |
898 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
899 | if (ret < 0) { | |
72079cae | 900 | goto error; |
5eb91c98 DG |
901 | } |
902 | ||
903 | /* Update number of fd */ | |
904 | nb_fd = LTTNG_POLL_GETNB(&events); | |
905 | ||
906 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 907 | restart_poll: |
5eb91c98 DG |
908 | ret = lttng_poll_wait(&events, -1); |
909 | if (ret < 0) { | |
88f2b785 MD |
910 | /* |
911 | * Restart interrupted system call. | |
912 | */ | |
913 | if (errno == EINTR) { | |
914 | goto restart_poll; | |
915 | } | |
72079cae DG |
916 | goto error; |
917 | } | |
918 | ||
5eb91c98 DG |
919 | for (i = 0; i < nb_fd; i++) { |
920 | /* Fetch once the poll data */ | |
921 | revents = LTTNG_POLL_GETEV(&events, i); | |
922 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
923 | ||
924 | /* Thread quit pipe has been closed. Killing thread. */ | |
925 | ret = check_thread_quit_pipe(pollfd, revents); | |
926 | if (ret) { | |
927 | goto error; | |
928 | } | |
929 | ||
930 | /* Event on the kconsumerd socket */ | |
931 | if (pollfd == sock) { | |
932 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 933 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
934 | goto error; |
935 | } | |
936 | } | |
937 | } | |
938 | ||
712ea556 | 939 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
940 | ret = lttcomm_recv_unix_sock(sock, &code, |
941 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 942 | if (ret <= 0) { |
3bd1e081 | 943 | ERR("consumer closed the command socket"); |
712ea556 | 944 | goto error; |
6f61d021 | 945 | } |
1d4b027a | 946 | |
3bd1e081 | 947 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 948 | |
1d4b027a | 949 | error: |
5c827ce0 DG |
950 | /* Immediately set the consumerd state to stopped */ |
951 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
952 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
953 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
954 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
955 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
956 | } else { | |
957 | /* Code flow error... */ | |
958 | assert(0); | |
959 | } | |
960 | ||
76d7553f MD |
961 | if (consumer_data->err_sock >= 0) { |
962 | ret = close(consumer_data->err_sock); | |
963 | if (ret) { | |
964 | PERROR("close"); | |
965 | } | |
966 | } | |
967 | if (consumer_data->cmd_sock >= 0) { | |
968 | ret = close(consumer_data->cmd_sock); | |
969 | if (ret) { | |
970 | PERROR("close"); | |
971 | } | |
972 | } | |
973 | if (sock >= 0) { | |
974 | ret = close(sock); | |
975 | if (ret) { | |
976 | PERROR("close"); | |
977 | } | |
978 | } | |
273ea72c | 979 | |
3bd1e081 MD |
980 | unlink(consumer_data->err_unix_sock_path); |
981 | unlink(consumer_data->cmd_unix_sock_path); | |
982 | consumer_data->pid = 0; | |
1d4b027a | 983 | |
5eb91c98 | 984 | lttng_poll_clean(&events); |
76d7553f MD |
985 | error_poll: |
986 | error_listen: | |
987 | DBG("consumer thread cleanup completed"); | |
0177d773 | 988 | |
5eb91c98 | 989 | return NULL; |
099e26bd DG |
990 | } |
991 | ||
099e26bd DG |
992 | /* |
993 | * This thread manage application communication. | |
1d4b027a DG |
994 | */ |
995 | static void *thread_manage_apps(void *data) | |
099e26bd | 996 | { |
5eb91c98 DG |
997 | int i, ret, pollfd; |
998 | uint32_t revents, nb_fd; | |
099e26bd | 999 | struct ust_command ust_cmd; |
5eb91c98 | 1000 | struct lttng_poll_event events; |
099e26bd DG |
1001 | |
1002 | DBG("[thread] Manage application started"); | |
1003 | ||
f6a9efaa DG |
1004 | rcu_register_thread(); |
1005 | rcu_thread_online(); | |
1006 | ||
5eb91c98 DG |
1007 | ret = create_thread_poll_set(&events, 2); |
1008 | if (ret < 0) { | |
76d7553f | 1009 | goto error_poll_create; |
5eb91c98 | 1010 | } |
099e26bd | 1011 | |
5eb91c98 DG |
1012 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1013 | if (ret < 0) { | |
1014 | goto error; | |
1015 | } | |
099e26bd | 1016 | |
5eb91c98 DG |
1017 | while (1) { |
1018 | /* Zeroed the events structure */ | |
1019 | lttng_poll_reset(&events); | |
0177d773 | 1020 | |
5eb91c98 | 1021 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1022 | |
1023 | DBG("Apps thread polling on %d fds", nb_fd); | |
1024 | ||
1025 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1026 | restart: |
5eb91c98 | 1027 | ret = lttng_poll_wait(&events, -1); |
099e26bd | 1028 | if (ret < 0) { |
88f2b785 MD |
1029 | /* |
1030 | * Restart interrupted system call. | |
1031 | */ | |
1032 | if (errno == EINTR) { | |
1033 | goto restart; | |
1034 | } | |
099e26bd DG |
1035 | goto error; |
1036 | } | |
1037 | ||
5eb91c98 DG |
1038 | for (i = 0; i < nb_fd; i++) { |
1039 | /* Fetch once the poll data */ | |
1040 | revents = LTTNG_POLL_GETEV(&events, i); | |
1041 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1042 | ||
1043 | /* Thread quit pipe has been closed. Killing thread. */ | |
1044 | ret = check_thread_quit_pipe(pollfd, revents); | |
1045 | if (ret) { | |
099e26bd | 1046 | goto error; |
5eb91c98 | 1047 | } |
099e26bd | 1048 | |
5eb91c98 DG |
1049 | /* Inspect the apps cmd pipe */ |
1050 | if (pollfd == apps_cmd_pipe[0]) { | |
1051 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1052 | ERR("Apps command pipe error"); | |
0177d773 | 1053 | goto error; |
5eb91c98 DG |
1054 | } else if (revents & LPOLLIN) { |
1055 | /* Empty pipe */ | |
1056 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1057 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1058 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1059 | goto error; |
1060 | } | |
099e26bd | 1061 | |
5eb91c98 | 1062 | /* Register applicaton to the session daemon */ |
56fff090 | 1063 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1064 | ust_cmd.sock); |
88ff5b7f | 1065 | if (ret == -ENOMEM) { |
5eb91c98 | 1066 | goto error; |
88ff5b7f MD |
1067 | } else if (ret < 0) { |
1068 | break; | |
5eb91c98 DG |
1069 | } |
1070 | ||
acc7b41b | 1071 | /* |
e0c7ec2b | 1072 | * Validate UST version compatibility. |
acc7b41b | 1073 | */ |
e0c7ec2b DG |
1074 | ret = ust_app_validate_version(ust_cmd.sock); |
1075 | if (ret >= 0) { | |
1076 | /* | |
1077 | * Add channel(s) and event(s) to newly registered apps | |
1078 | * from lttng global UST domain. | |
1079 | */ | |
1080 | update_ust_app(ust_cmd.sock); | |
1081 | } | |
acc7b41b | 1082 | |
f2ca2e25 | 1083 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1084 | if (ret < 0) { |
1085 | /* | |
1086 | * If the registration is not possible, we simply | |
1087 | * unregister the apps and continue | |
1088 | */ | |
56fff090 | 1089 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1090 | } else { |
1091 | /* | |
1092 | * We just need here to monitor the close of the UST | |
1093 | * socket and poll set monitor those by default. | |
a9ade966 MD |
1094 | * Listen on POLLIN (even if we never expect any |
1095 | * data) to ensure that hangup wakes us. | |
5eb91c98 | 1096 | */ |
a9ade966 | 1097 | ret = lttng_poll_add(&events, ust_cmd.sock, LPOLLIN); |
5eb91c98 DG |
1098 | if (ret < 0) { |
1099 | goto error; | |
1100 | } | |
1101 | ||
54d01ffb DG |
1102 | DBG("Apps with sock %d added to poll set", |
1103 | ust_cmd.sock); | |
5eb91c98 | 1104 | } |
487cf67c | 1105 | |
5eb91c98 | 1106 | break; |
0177d773 | 1107 | } |
5eb91c98 DG |
1108 | } else { |
1109 | /* | |
54d01ffb DG |
1110 | * At this point, we know that a registered application made |
1111 | * the event at poll_wait. | |
5eb91c98 DG |
1112 | */ |
1113 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1114 | /* Removing from the poll set */ | |
1115 | ret = lttng_poll_del(&events, pollfd); | |
1116 | if (ret < 0) { | |
1117 | goto error; | |
1118 | } | |
099e26bd | 1119 | |
b9d9b220 | 1120 | /* Socket closed on remote end. */ |
56fff090 | 1121 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1122 | break; |
1123 | } | |
099e26bd DG |
1124 | } |
1125 | } | |
099e26bd DG |
1126 | } |
1127 | ||
1128 | error: | |
5eb91c98 | 1129 | lttng_poll_clean(&events); |
76d7553f MD |
1130 | error_poll_create: |
1131 | DBG("Application communication apps thread cleanup complete"); | |
f6a9efaa DG |
1132 | rcu_thread_offline(); |
1133 | rcu_unregister_thread(); | |
099e26bd DG |
1134 | return NULL; |
1135 | } | |
1136 | ||
1137 | /* | |
1138 | * Dispatch request from the registration threads to the application | |
1139 | * communication thread. | |
1140 | */ | |
1141 | static void *thread_dispatch_ust_registration(void *data) | |
1142 | { | |
1143 | int ret; | |
1144 | struct cds_wfq_node *node; | |
1145 | struct ust_command *ust_cmd = NULL; | |
1146 | ||
1147 | DBG("[thread] Dispatch UST command started"); | |
1148 | ||
1149 | while (!dispatch_thread_exit) { | |
1150 | /* Atomically prepare the queue futex */ | |
1151 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1152 | ||
1153 | do { | |
1154 | /* Dequeue command for registration */ | |
1155 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1156 | if (node == NULL) { | |
00a17c97 | 1157 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1158 | /* Continue thread execution */ |
1159 | break; | |
1160 | } | |
1161 | ||
1162 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1163 | ||
2f50c8a3 DG |
1164 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1165 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1166 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1167 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1168 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1169 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1170 | /* |
1171 | * Inform apps thread of the new application registration. This | |
1172 | * call is blocking so we can be assured that the data will be read | |
1173 | * at some point in time or wait to the end of the world :) | |
1174 | */ | |
1175 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1176 | sizeof(struct ust_command)); | |
1177 | if (ret < 0) { | |
76d7553f | 1178 | PERROR("write apps cmd pipe"); |
099e26bd DG |
1179 | if (errno == EBADF) { |
1180 | /* | |
1181 | * We can't inform the application thread to process | |
1182 | * registration. We will exit or else application | |
1183 | * registration will not occur and tracing will never | |
1184 | * start. | |
1185 | */ | |
1186 | goto error; | |
1187 | } | |
1188 | } | |
1189 | free(ust_cmd); | |
1190 | } while (node != NULL); | |
1191 | ||
1192 | /* Futex wait on queue. Blocking call on futex() */ | |
1193 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1194 | } | |
1195 | ||
1196 | error: | |
1197 | DBG("Dispatch thread dying"); | |
1198 | return NULL; | |
1199 | } | |
1200 | ||
1201 | /* | |
1202 | * This thread manage application registration. | |
1203 | */ | |
1204 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1205 | { |
a4b35e07 | 1206 | int sock = -1, i, ret, pollfd; |
5eb91c98 DG |
1207 | uint32_t revents, nb_fd; |
1208 | struct lttng_poll_event events; | |
099e26bd DG |
1209 | /* |
1210 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1211 | * freed in the manage apps thread. | |
1212 | */ | |
1213 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1214 | |
099e26bd | 1215 | DBG("[thread] Manage application registration started"); |
1d4b027a DG |
1216 | |
1217 | ret = lttcomm_listen_unix_sock(apps_sock); | |
1218 | if (ret < 0) { | |
76d7553f | 1219 | goto error_listen; |
1d4b027a DG |
1220 | } |
1221 | ||
5eb91c98 DG |
1222 | /* |
1223 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1224 | * more will be added to this poll set. | |
1225 | */ | |
1226 | ret = create_thread_poll_set(&events, 2); | |
1227 | if (ret < 0) { | |
76d7553f | 1228 | goto error_create_poll; |
5eb91c98 | 1229 | } |
273ea72c | 1230 | |
5eb91c98 DG |
1231 | /* Add the application registration socket */ |
1232 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1233 | if (ret < 0) { | |
76d7553f | 1234 | goto error_poll_add; |
5eb91c98 | 1235 | } |
273ea72c | 1236 | |
1d4b027a | 1237 | /* Notify all applications to register */ |
0fdd1e2c DG |
1238 | ret = notify_ust_apps(1); |
1239 | if (ret < 0) { | |
1240 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1241 | "Execution continues but there might be problem for already\n" |
1242 | "running applications that wishes to register."); | |
0fdd1e2c | 1243 | } |
1d4b027a DG |
1244 | |
1245 | while (1) { | |
1246 | DBG("Accepting application registration"); | |
273ea72c | 1247 | |
5eb91c98 DG |
1248 | nb_fd = LTTNG_POLL_GETNB(&events); |
1249 | ||
273ea72c | 1250 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1251 | restart: |
5eb91c98 | 1252 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 1253 | if (ret < 0) { |
88f2b785 MD |
1254 | /* |
1255 | * Restart interrupted system call. | |
1256 | */ | |
1257 | if (errno == EINTR) { | |
1258 | goto restart; | |
1259 | } | |
273ea72c DG |
1260 | goto error; |
1261 | } | |
1262 | ||
5eb91c98 DG |
1263 | for (i = 0; i < nb_fd; i++) { |
1264 | /* Fetch once the poll data */ | |
1265 | revents = LTTNG_POLL_GETEV(&events, i); | |
1266 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1267 | |
5eb91c98 DG |
1268 | /* Thread quit pipe has been closed. Killing thread. */ |
1269 | ret = check_thread_quit_pipe(pollfd, revents); | |
1270 | if (ret) { | |
90014c57 DG |
1271 | goto error; |
1272 | } | |
1d4b027a | 1273 | |
5eb91c98 DG |
1274 | /* Event on the registration socket */ |
1275 | if (pollfd == apps_sock) { | |
1276 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1277 | ERR("Register apps socket poll error"); | |
1278 | goto error; | |
1279 | } else if (revents & LPOLLIN) { | |
1280 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1281 | if (sock < 0) { | |
1282 | goto error; | |
1283 | } | |
099e26bd | 1284 | |
5eb91c98 | 1285 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1286 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1287 | if (ust_cmd == NULL) { |
76d7553f | 1288 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1289 | goto error; |
1290 | } | |
1d4b027a | 1291 | |
5eb91c98 DG |
1292 | /* |
1293 | * Using message-based transmissions to ensure we don't | |
1294 | * have to deal with partially received messages. | |
1295 | */ | |
4063050c MD |
1296 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1297 | if (ret < 0) { | |
1298 | ERR("Exhausted file descriptors allowed for applications."); | |
1299 | free(ust_cmd); | |
1300 | ret = close(sock); | |
1301 | if (ret) { | |
1302 | PERROR("close"); | |
1303 | } | |
1304 | sock = -1; | |
1305 | continue; | |
1306 | } | |
5eb91c98 DG |
1307 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1308 | sizeof(struct ust_register_msg)); | |
1309 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1310 | if (ret < 0) { | |
76d7553f | 1311 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1312 | } else { |
1313 | ERR("Wrong size received on apps register"); | |
1314 | } | |
1315 | free(ust_cmd); | |
76d7553f MD |
1316 | ret = close(sock); |
1317 | if (ret) { | |
1318 | PERROR("close"); | |
1319 | } | |
4063050c | 1320 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1321 | sock = -1; |
5eb91c98 DG |
1322 | continue; |
1323 | } | |
099e26bd | 1324 | |
5eb91c98 | 1325 | ust_cmd->sock = sock; |
34a2494f | 1326 | sock = -1; |
099e26bd | 1327 | |
5eb91c98 DG |
1328 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1329 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1330 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1331 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1332 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1333 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1334 | |
5eb91c98 DG |
1335 | /* |
1336 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1337 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1338 | */ |
1339 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1340 | ||
1341 | /* | |
1342 | * Wake the registration queue futex. Implicit memory | |
1343 | * barrier with the exchange in cds_wfq_enqueue. | |
1344 | */ | |
1345 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1346 | } | |
1347 | } | |
90014c57 | 1348 | } |
1d4b027a DG |
1349 | } |
1350 | ||
1351 | error: | |
0fdd1e2c DG |
1352 | /* Notify that the registration thread is gone */ |
1353 | notify_ust_apps(0); | |
1354 | ||
a4b35e07 | 1355 | if (apps_sock >= 0) { |
76d7553f MD |
1356 | ret = close(apps_sock); |
1357 | if (ret) { | |
1358 | PERROR("close"); | |
1359 | } | |
a4b35e07 | 1360 | } |
46c3f085 | 1361 | if (sock >= 0) { |
76d7553f MD |
1362 | ret = close(sock); |
1363 | if (ret) { | |
1364 | PERROR("close"); | |
1365 | } | |
4063050c | 1366 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1367 | } |
273ea72c | 1368 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1369 | |
76d7553f | 1370 | error_poll_add: |
5eb91c98 | 1371 | lttng_poll_clean(&events); |
76d7553f MD |
1372 | error_listen: |
1373 | error_create_poll: | |
1374 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1375 | |
1d4b027a DG |
1376 | return NULL; |
1377 | } | |
1378 | ||
8c0faa1d | 1379 | /* |
3bd1e081 | 1380 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1381 | * exec or it will fails. |
8c0faa1d | 1382 | */ |
3bd1e081 | 1383 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d DG |
1384 | { |
1385 | int ret; | |
ee0b0061 DG |
1386 | struct timespec timeout; |
1387 | ||
1388 | timeout.tv_sec = DEFAULT_SEM_WAIT_TIMEOUT; | |
1389 | timeout.tv_nsec = 0; | |
8c0faa1d DG |
1390 | |
1391 | /* Setup semaphore */ | |
3bd1e081 | 1392 | ret = sem_init(&consumer_data->sem, 0, 0); |
ee0b0061 | 1393 | if (ret < 0) { |
3bd1e081 | 1394 | PERROR("sem_init consumer semaphore"); |
ee0b0061 DG |
1395 | goto error; |
1396 | } | |
8c0faa1d | 1397 | |
3bd1e081 MD |
1398 | ret = pthread_create(&consumer_data->thread, NULL, |
1399 | thread_manage_consumer, consumer_data); | |
8c0faa1d | 1400 | if (ret != 0) { |
3bd1e081 | 1401 | PERROR("pthread_create consumer"); |
ee0b0061 | 1402 | ret = -1; |
8c0faa1d DG |
1403 | goto error; |
1404 | } | |
1405 | ||
ee0b0061 DG |
1406 | /* Get time for sem_timedwait absolute timeout */ |
1407 | ret = clock_gettime(CLOCK_REALTIME, &timeout); | |
1408 | if (ret < 0) { | |
3bd1e081 | 1409 | PERROR("clock_gettime spawn consumer"); |
ee0b0061 | 1410 | /* Infinite wait for the kconsumerd thread to be ready */ |
3bd1e081 | 1411 | ret = sem_wait(&consumer_data->sem); |
ee0b0061 DG |
1412 | } else { |
1413 | /* Normal timeout if the gettime was successful */ | |
1414 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
3bd1e081 | 1415 | ret = sem_timedwait(&consumer_data->sem, &timeout); |
ee0b0061 | 1416 | } |
8c0faa1d | 1417 | |
ee0b0061 DG |
1418 | if (ret < 0) { |
1419 | if (errno == ETIMEDOUT) { | |
1420 | /* | |
1421 | * Call has timed out so we kill the kconsumerd_thread and return | |
1422 | * an error. | |
1423 | */ | |
3bd1e081 MD |
1424 | ERR("The consumer thread was never ready. Killing it"); |
1425 | ret = pthread_cancel(consumer_data->thread); | |
ee0b0061 | 1426 | if (ret < 0) { |
3bd1e081 | 1427 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1428 | } |
1429 | } else { | |
3bd1e081 | 1430 | PERROR("semaphore wait failed consumer thread"); |
ee0b0061 DG |
1431 | } |
1432 | goto error; | |
1433 | } | |
1434 | ||
3bd1e081 MD |
1435 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1436 | if (consumer_data->pid == 0) { | |
712ea556 | 1437 | ERR("Kconsumerd did not start"); |
3bd1e081 | 1438 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1439 | goto error; |
1440 | } | |
3bd1e081 | 1441 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1442 | |
8c0faa1d DG |
1443 | return 0; |
1444 | ||
1445 | error: | |
1446 | return ret; | |
1447 | } | |
1448 | ||
d9800920 | 1449 | /* |
3bd1e081 | 1450 | * Join consumer thread |
d9800920 | 1451 | */ |
3bd1e081 | 1452 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1453 | { |
1454 | void *status; | |
1455 | int ret; | |
1456 | ||
3bd1e081 MD |
1457 | if (consumer_data->pid != 0) { |
1458 | ret = kill(consumer_data->pid, SIGTERM); | |
cf3af59e | 1459 | if (ret) { |
3bd1e081 | 1460 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1461 | return ret; |
1462 | } | |
3bd1e081 | 1463 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1464 | } else { |
1465 | return 0; | |
1466 | } | |
1467 | } | |
1468 | ||
8c0faa1d | 1469 | /* |
3bd1e081 | 1470 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1471 | * |
d063d709 | 1472 | * Return pid if successful else -1. |
8c0faa1d | 1473 | */ |
3bd1e081 | 1474 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1475 | { |
1476 | int ret; | |
1477 | pid_t pid; | |
94c55f17 | 1478 | const char *consumer_to_use; |
53086306 | 1479 | const char *verbosity; |
94c55f17 | 1480 | struct stat st; |
8c0faa1d | 1481 | |
3bd1e081 | 1482 | DBG("Spawning consumerd"); |
c49dc785 | 1483 | |
8c0faa1d DG |
1484 | pid = fork(); |
1485 | if (pid == 0) { | |
1486 | /* | |
3bd1e081 | 1487 | * Exec consumerd. |
8c0faa1d | 1488 | */ |
daee5345 | 1489 | if (opt_verbose_consumer) { |
53086306 DG |
1490 | verbosity = "--verbose"; |
1491 | } else { | |
1492 | verbosity = "--quiet"; | |
1493 | } | |
3bd1e081 MD |
1494 | switch (consumer_data->type) { |
1495 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1496 | /* |
c7704d57 DG |
1497 | * Find out which consumerd to execute. We will first try the |
1498 | * 64-bit path, then the sessiond's installation directory, and | |
1499 | * fallback on the 32-bit one, | |
94c55f17 | 1500 | */ |
63a799e8 AM |
1501 | DBG3("Looking for a kernel consumer at these locations:"); |
1502 | DBG3(" 1) %s", consumerd64_bin); | |
1503 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1504 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1505 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1506 | DBG3("Found location #1"); |
94c55f17 | 1507 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1508 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1509 | DBG3("Found location #2"); |
94c55f17 | 1510 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1511 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1512 | DBG3("Found location #3"); |
eb1e0bd4 | 1513 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1514 | } else { |
63a799e8 | 1515 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1516 | break; |
1517 | } | |
1518 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1519 | execl(consumer_to_use, | |
1520 | "lttng-consumerd", verbosity, "-k", | |
1521 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1522 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1523 | NULL); | |
3bd1e081 | 1524 | break; |
7753dea8 MD |
1525 | case LTTNG_CONSUMER64_UST: |
1526 | { | |
b1e0b6b6 | 1527 | char *tmpnew = NULL; |
8f4905da MD |
1528 | |
1529 | if (consumerd64_libdir[0] != '\0') { | |
1530 | char *tmp; | |
1531 | size_t tmplen; | |
1532 | ||
1533 | tmp = getenv("LD_LIBRARY_PATH"); | |
1534 | if (!tmp) { | |
1535 | tmp = ""; | |
1536 | } | |
1537 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1538 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1539 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1540 | if (!tmpnew) { | |
1541 | ret = -ENOMEM; | |
1542 | goto error; | |
1543 | } | |
1544 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1545 | strcat(tmpnew, consumerd64_libdir); | |
1546 | if (tmp[0] != '\0') { | |
1547 | strcat(tmpnew, ":"); | |
1548 | strcat(tmpnew, tmp); | |
1549 | } | |
1550 | ret = putenv(tmpnew); | |
1551 | if (ret) { | |
1552 | ret = -errno; | |
1553 | goto error; | |
1554 | } | |
1555 | } | |
94c55f17 | 1556 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1557 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1558 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1559 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1560 | NULL); | |
8f4905da MD |
1561 | if (consumerd64_libdir[0] != '\0') { |
1562 | free(tmpnew); | |
1563 | } | |
1564 | if (ret) { | |
1565 | goto error; | |
1566 | } | |
3bd1e081 | 1567 | break; |
7753dea8 MD |
1568 | } |
1569 | case LTTNG_CONSUMER32_UST: | |
1570 | { | |
937dde8e | 1571 | char *tmpnew = NULL; |
8f4905da MD |
1572 | |
1573 | if (consumerd32_libdir[0] != '\0') { | |
1574 | char *tmp; | |
1575 | size_t tmplen; | |
1576 | ||
1577 | tmp = getenv("LD_LIBRARY_PATH"); | |
1578 | if (!tmp) { | |
1579 | tmp = ""; | |
1580 | } | |
1581 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1582 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1583 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1584 | if (!tmpnew) { | |
1585 | ret = -ENOMEM; | |
1586 | goto error; | |
1587 | } | |
1588 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1589 | strcat(tmpnew, consumerd32_libdir); | |
1590 | if (tmp[0] != '\0') { | |
1591 | strcat(tmpnew, ":"); | |
1592 | strcat(tmpnew, tmp); | |
1593 | } | |
1594 | ret = putenv(tmpnew); | |
1595 | if (ret) { | |
1596 | ret = -errno; | |
1597 | goto error; | |
1598 | } | |
1599 | } | |
94c55f17 | 1600 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1601 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1602 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1603 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1604 | NULL); | |
8f4905da MD |
1605 | if (consumerd32_libdir[0] != '\0') { |
1606 | free(tmpnew); | |
1607 | } | |
1608 | if (ret) { | |
1609 | goto error; | |
1610 | } | |
7753dea8 MD |
1611 | break; |
1612 | } | |
3bd1e081 | 1613 | default: |
76d7553f | 1614 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1615 | exit(EXIT_FAILURE); |
1616 | } | |
8c0faa1d | 1617 | if (errno != 0) { |
76d7553f | 1618 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1619 | } |
1620 | exit(EXIT_FAILURE); | |
1621 | } else if (pid > 0) { | |
1622 | ret = pid; | |
8c0faa1d | 1623 | } else { |
76d7553f | 1624 | PERROR("start consumer fork"); |
8c0faa1d | 1625 | ret = -errno; |
8c0faa1d | 1626 | } |
8f4905da | 1627 | error: |
8c0faa1d DG |
1628 | return ret; |
1629 | } | |
1630 | ||
693bd40b | 1631 | /* |
3bd1e081 | 1632 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1633 | */ |
3bd1e081 | 1634 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b DG |
1635 | { |
1636 | int ret; | |
1637 | ||
3bd1e081 MD |
1638 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1639 | if (consumer_data->pid != 0) { | |
1640 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1641 | goto end; |
1642 | } | |
693bd40b | 1643 | |
3bd1e081 | 1644 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1645 | if (ret < 0) { |
3bd1e081 MD |
1646 | ERR("Spawning consumerd failed"); |
1647 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1648 | goto error; |
693bd40b | 1649 | } |
c49dc785 | 1650 | |
3bd1e081 MD |
1651 | /* Setting up the consumer_data pid */ |
1652 | consumer_data->pid = ret; | |
48842b30 | 1653 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1654 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1655 | |
3bd1e081 MD |
1656 | DBG2("Spawning consumer control thread"); |
1657 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1658 | if (ret < 0) { |
3bd1e081 | 1659 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1660 | goto error; |
1661 | } | |
1662 | ||
c49dc785 | 1663 | end: |
693bd40b DG |
1664 | return 0; |
1665 | ||
1666 | error: | |
1667 | return ret; | |
1668 | } | |
1669 | ||
b73401da | 1670 | /* |
096102bd | 1671 | * Check version of the lttng-modules. |
b73401da | 1672 | */ |
096102bd | 1673 | static int validate_lttng_modules_version(void) |
b73401da | 1674 | { |
096102bd | 1675 | return kernel_validate_version(kernel_tracer_fd); |
ab147185 MD |
1676 | } |
1677 | ||
b73401da | 1678 | /* |
096102bd | 1679 | * Setup necessary data for kernel tracer action. |
b73401da | 1680 | */ |
096102bd | 1681 | static int init_kernel_tracer(void) |
b73401da DG |
1682 | { |
1683 | int ret; | |
b73401da | 1684 | |
096102bd DG |
1685 | /* Modprobe lttng kernel modules */ |
1686 | ret = modprobe_lttng_control(); | |
b73401da | 1687 | if (ret < 0) { |
b73401da DG |
1688 | goto error; |
1689 | } | |
1690 | ||
096102bd DG |
1691 | /* Open debugfs lttng */ |
1692 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1693 | if (kernel_tracer_fd < 0) { | |
1694 | DBG("Failed to open %s", module_proc_lttng); | |
1695 | ret = -1; | |
1696 | goto error_open; | |
b73401da DG |
1697 | } |
1698 | ||
096102bd DG |
1699 | /* Validate kernel version */ |
1700 | ret = validate_lttng_modules_version(); | |
b73401da | 1701 | if (ret < 0) { |
096102bd | 1702 | goto error_version; |
b73401da DG |
1703 | } |
1704 | ||
096102bd | 1705 | ret = modprobe_lttng_data(); |
b73401da | 1706 | if (ret < 0) { |
096102bd | 1707 | goto error_modules; |
8c0faa1d DG |
1708 | } |
1709 | ||
f3ed775e | 1710 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
096102bd DG |
1711 | return 0; |
1712 | ||
1713 | error_version: | |
1714 | modprobe_remove_lttng_control(); | |
76d7553f MD |
1715 | ret = close(kernel_tracer_fd); |
1716 | if (ret) { | |
1717 | PERROR("close"); | |
1718 | } | |
1719 | kernel_tracer_fd = -1; | |
096102bd DG |
1720 | return LTTCOMM_KERN_VERSION; |
1721 | ||
1722 | error_modules: | |
76d7553f MD |
1723 | ret = close(kernel_tracer_fd); |
1724 | if (ret) { | |
1725 | PERROR("close"); | |
1726 | } | |
096102bd DG |
1727 | |
1728 | error_open: | |
1729 | modprobe_remove_lttng_control(); | |
b73401da DG |
1730 | |
1731 | error: | |
b73401da | 1732 | WARN("No kernel tracer available"); |
a4b35e07 | 1733 | kernel_tracer_fd = -1; |
531d29f9 MD |
1734 | if (!is_root) { |
1735 | return LTTCOMM_NEED_ROOT_SESSIOND; | |
1736 | } else { | |
1737 | return LTTCOMM_KERN_NA; | |
1738 | } | |
f3ed775e | 1739 | } |
33a2b854 | 1740 | |
f3ed775e | 1741 | /* |
54d01ffb | 1742 | * Init tracing by creating trace directory and sending fds kernel consumer. |
f3ed775e | 1743 | */ |
54d01ffb | 1744 | static int init_kernel_tracing(struct ltt_kernel_session *session) |
f3ed775e | 1745 | { |
f40799e8 | 1746 | int ret = 0; |
8c0faa1d | 1747 | |
3bd1e081 | 1748 | if (session->consumer_fds_sent == 0) { |
d9800920 | 1749 | /* |
54d01ffb | 1750 | * Assign default kernel consumer socket if no consumer assigned to the |
03550b58 | 1751 | * kernel session. At this point, it's NOT supposed to be -1 but this is |
54d01ffb | 1752 | * an extra security check. |
d9800920 | 1753 | */ |
03550b58 | 1754 | if (session->consumer_fd < 0) { |
3bd1e081 | 1755 | session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1756 | } |
1757 | ||
f1e16794 | 1758 | ret = kernel_consumer_send_session(&kconsumer_data, session); |
f3ed775e | 1759 | if (ret < 0) { |
f3ed775e DG |
1760 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
1761 | goto error; | |
1762 | } | |
1d4b027a | 1763 | |
3bd1e081 | 1764 | session->consumer_fds_sent = 1; |
f3ed775e | 1765 | } |
1d4b027a DG |
1766 | |
1767 | error: | |
1768 | return ret; | |
8c0faa1d DG |
1769 | } |
1770 | ||
0177d773 DG |
1771 | /* |
1772 | * Create an UST session and add it to the session ust list. | |
1773 | */ | |
44d3bd01 | 1774 | static int create_ust_session(struct ltt_session *session, |
6df2e2c9 | 1775 | struct lttng_domain *domain) |
0177d773 | 1776 | { |
13384287 | 1777 | struct ltt_ust_session *lus = NULL; |
6df2e2c9 | 1778 | int ret; |
44d3bd01 DG |
1779 | |
1780 | switch (domain->type) { | |
48842b30 | 1781 | case LTTNG_DOMAIN_UST: |
44d3bd01 DG |
1782 | break; |
1783 | default: | |
13384287 | 1784 | ret = LTTCOMM_UNKNOWN_DOMAIN; |
44d3bd01 DG |
1785 | goto error; |
1786 | } | |
0177d773 DG |
1787 | |
1788 | DBG("Creating UST session"); | |
1789 | ||
a991f516 | 1790 | lus = trace_ust_create_session(session->path, session->id, domain); |
0177d773 | 1791 | if (lus == NULL) { |
44d3bd01 | 1792 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1793 | goto error; |
1794 | } | |
1795 | ||
e11d277b | 1796 | ret = run_as_mkdir_recursive(lus->pathname, S_IRWXU | S_IRWXG, |
6df2e2c9 | 1797 | session->uid, session->gid); |
0177d773 DG |
1798 | if (ret < 0) { |
1799 | if (ret != -EEXIST) { | |
1800 | ERR("Trace directory creation error"); | |
44d3bd01 | 1801 | ret = LTTCOMM_UST_SESS_FAIL; |
0177d773 DG |
1802 | goto error; |
1803 | } | |
1804 | } | |
1805 | ||
f6a9efaa DG |
1806 | /* The domain type dictate different actions on session creation */ |
1807 | switch (domain->type) { | |
48842b30 DG |
1808 | case LTTNG_DOMAIN_UST: |
1809 | /* No ustctl for the global UST domain */ | |
1810 | break; | |
1811 | default: | |
36dc12cc | 1812 | ERR("Unknown UST domain on create session %d", domain->type); |
48842b30 | 1813 | goto error; |
0177d773 | 1814 | } |
6df2e2c9 MD |
1815 | lus->uid = session->uid; |
1816 | lus->gid = session->gid; | |
f6a9efaa | 1817 | session->ust_session = lus; |
44d3bd01 DG |
1818 | |
1819 | return LTTCOMM_OK; | |
0177d773 DG |
1820 | |
1821 | error: | |
1822 | free(lus); | |
1823 | return ret; | |
1824 | } | |
1825 | ||
333f285e | 1826 | /* |
d063d709 | 1827 | * Create a kernel tracer session then create the default channel. |
333f285e | 1828 | */ |
6df2e2c9 | 1829 | static int create_kernel_session(struct ltt_session *session) |
333f285e | 1830 | { |
f3ed775e | 1831 | int ret; |
f3ed775e DG |
1832 | |
1833 | DBG("Creating kernel session"); | |
1834 | ||
1835 | ret = kernel_create_session(session, kernel_tracer_fd); | |
1836 | if (ret < 0) { | |
1837 | ret = LTTCOMM_KERN_SESS_FAIL; | |
1838 | goto error; | |
333f285e DG |
1839 | } |
1840 | ||
d9800920 | 1841 | /* Set kernel consumer socket fd */ |
03550b58 | 1842 | if (kconsumer_data.cmd_sock >= 0) { |
3bd1e081 | 1843 | session->kernel_session->consumer_fd = kconsumer_data.cmd_sock; |
d9800920 DG |
1844 | } |
1845 | ||
e11d277b | 1846 | ret = run_as_mkdir_recursive(session->kernel_session->trace_path, |
6df2e2c9 | 1847 | S_IRWXU | S_IRWXG, session->uid, session->gid); |
7a485870 | 1848 | if (ret < 0) { |
996b65c8 | 1849 | if (ret != -EEXIST) { |
7a485870 DG |
1850 | ERR("Trace directory creation error"); |
1851 | goto error; | |
1852 | } | |
1853 | } | |
6df2e2c9 MD |
1854 | session->kernel_session->uid = session->uid; |
1855 | session->kernel_session->gid = session->gid; | |
7a485870 | 1856 | |
f3ed775e DG |
1857 | error: |
1858 | return ret; | |
333f285e DG |
1859 | } |
1860 | ||
8e0af1b4 | 1861 | /* |
c7704d57 DG |
1862 | * Check if the UID or GID match the session. Root user has access to all |
1863 | * sessions. | |
8e0af1b4 | 1864 | */ |
c7704d57 | 1865 | static int session_access_ok(struct ltt_session *session, uid_t uid, gid_t gid) |
8e0af1b4 | 1866 | { |
c7704d57 | 1867 | if (uid != session->uid && gid != session->gid && uid != 0) { |
8e0af1b4 MD |
1868 | return 0; |
1869 | } else { | |
1870 | return 1; | |
1871 | } | |
1872 | } | |
1873 | ||
1874 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
1875 | { | |
1876 | unsigned int i = 0; | |
1877 | struct ltt_session *session; | |
1878 | ||
1879 | DBG("Counting number of available session for UID %d GID %d", | |
1880 | uid, gid); | |
1881 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
1882 | /* | |
1883 | * Only list the sessions the user can control. | |
1884 | */ | |
1885 | if (!session_access_ok(session, uid, gid)) { | |
1886 | continue; | |
1887 | } | |
1888 | i++; | |
1889 | } | |
1890 | return i; | |
1891 | } | |
1892 | ||
6c9cc2ab DG |
1893 | /* |
1894 | * Using the session list, filled a lttng_session array to send back to the | |
1895 | * client for session listing. | |
1896 | * | |
1897 | * The session list lock MUST be acquired before calling this function. Use | |
54d01ffb | 1898 | * session_lock_list() and session_unlock_list(). |
6c9cc2ab | 1899 | */ |
c7704d57 DG |
1900 | static void list_lttng_sessions(struct lttng_session *sessions, uid_t uid, |
1901 | gid_t gid) | |
6c9cc2ab | 1902 | { |
8e0af1b4 | 1903 | unsigned int i = 0; |
6c9cc2ab DG |
1904 | struct ltt_session *session; |
1905 | ||
8e0af1b4 MD |
1906 | DBG("Getting all available session for UID %d GID %d", |
1907 | uid, gid); | |
6c9cc2ab DG |
1908 | /* |
1909 | * Iterate over session list and append data after the control struct in | |
1910 | * the buffer. | |
1911 | */ | |
1912 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
8e0af1b4 MD |
1913 | /* |
1914 | * Only list the sessions the user can control. | |
1915 | */ | |
1916 | if (!session_access_ok(session, uid, gid)) { | |
1917 | continue; | |
1918 | } | |
6c9cc2ab | 1919 | strncpy(sessions[i].path, session->path, PATH_MAX); |
99497cd0 | 1920 | sessions[i].path[PATH_MAX - 1] = '\0'; |
6c9cc2ab | 1921 | strncpy(sessions[i].name, session->name, NAME_MAX); |
99497cd0 | 1922 | sessions[i].name[NAME_MAX - 1] = '\0'; |
464dd62d | 1923 | sessions[i].enabled = session->enabled; |
6c9cc2ab DG |
1924 | i++; |
1925 | } | |
1926 | } | |
1927 | ||
9f19cc17 DG |
1928 | /* |
1929 | * Fill lttng_channel array of all channels. | |
1930 | */ | |
b551a063 | 1931 | static void list_lttng_channels(int domain, struct ltt_session *session, |
9f19cc17 DG |
1932 | struct lttng_channel *channels) |
1933 | { | |
1934 | int i = 0; | |
1935 | struct ltt_kernel_channel *kchan; | |
1936 | ||
1937 | DBG("Listing channels for session %s", session->name); | |
1938 | ||
b551a063 DG |
1939 | switch (domain) { |
1940 | case LTTNG_DOMAIN_KERNEL: | |
1941 | /* Kernel channels */ | |
1942 | if (session->kernel_session != NULL) { | |
1943 | cds_list_for_each_entry(kchan, | |
1944 | &session->kernel_session->channel_list.head, list) { | |
1945 | /* Copy lttng_channel struct to array */ | |
1946 | memcpy(&channels[i], kchan->channel, sizeof(struct lttng_channel)); | |
1947 | channels[i].enabled = kchan->enabled; | |
1948 | i++; | |
1949 | } | |
1950 | } | |
1951 | break; | |
1952 | case LTTNG_DOMAIN_UST: | |
1953 | { | |
bec39940 | 1954 | struct lttng_ht_iter iter; |
b551a063 DG |
1955 | struct ltt_ust_channel *uchan; |
1956 | ||
bec39940 DG |
1957 | cds_lfht_for_each_entry(session->ust_session->domain_global.channels->ht, |
1958 | &iter.iter, uchan, node.node) { | |
b551a063 DG |
1959 | strncpy(channels[i].name, uchan->name, LTTNG_SYMBOL_NAME_LEN); |
1960 | channels[i].attr.overwrite = uchan->attr.overwrite; | |
1961 | channels[i].attr.subbuf_size = uchan->attr.subbuf_size; | |
1962 | channels[i].attr.num_subbuf = uchan->attr.num_subbuf; | |
1963 | channels[i].attr.switch_timer_interval = | |
1964 | uchan->attr.switch_timer_interval; | |
1965 | channels[i].attr.read_timer_interval = | |
1966 | uchan->attr.read_timer_interval; | |
aea829b3 | 1967 | channels[i].enabled = uchan->enabled; |
5edd7e09 DG |
1968 | switch (uchan->attr.output) { |
1969 | case LTTNG_UST_MMAP: | |
1970 | default: | |
1971 | channels[i].attr.output = LTTNG_EVENT_MMAP; | |
1972 | break; | |
1973 | } | |
befe0905 | 1974 | i++; |
b551a063 DG |
1975 | } |
1976 | break; | |
1977 | } | |
1978 | default: | |
1979 | break; | |
1980 | } | |
1981 | } | |
1982 | ||
1983 | /* | |
1984 | * Create a list of ust global domain events. | |
1985 | */ | |
1986 | static int list_lttng_ust_global_events(char *channel_name, | |
1987 | struct ltt_ust_domain_global *ust_global, struct lttng_event **events) | |
1988 | { | |
1989 | int i = 0, ret = 0; | |
1990 | unsigned int nb_event = 0; | |
bec39940 DG |
1991 | struct lttng_ht_iter iter; |
1992 | struct lttng_ht_node_str *node; | |
b551a063 DG |
1993 | struct ltt_ust_channel *uchan; |
1994 | struct ltt_ust_event *uevent; | |
1995 | struct lttng_event *tmp; | |
1996 | ||
1997 | DBG("Listing UST global events for channel %s", channel_name); | |
1998 | ||
1999 | rcu_read_lock(); | |
2000 | ||
bec39940 DG |
2001 | lttng_ht_lookup(ust_global->channels, (void *)channel_name, &iter); |
2002 | node = lttng_ht_iter_get_node_str(&iter); | |
d7b75b30 DG |
2003 | if (node == NULL) { |
2004 | ret = -LTTCOMM_UST_CHAN_NOT_FOUND; | |
2005 | goto error; | |
b551a063 DG |
2006 | } |
2007 | ||
bec39940 | 2008 | uchan = caa_container_of(&node->node, struct ltt_ust_channel, node.node); |
d7b75b30 | 2009 | |
bec39940 | 2010 | nb_event += lttng_ht_get_count(uchan->events); |
d7b75b30 | 2011 | |
b551a063 DG |
2012 | if (nb_event == 0) { |
2013 | ret = nb_event; | |
2014 | goto error; | |
2015 | } | |
2016 | ||
2017 | DBG3("Listing UST global %d events", nb_event); | |
2018 | ||
2019 | tmp = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2020 | if (tmp == NULL) { | |
2021 | ret = -LTTCOMM_FATAL; | |
2022 | goto error; | |
2023 | } | |
2024 | ||
bec39940 | 2025 | cds_lfht_for_each_entry(uchan->events->ht, &iter.iter, uevent, node.node) { |
d7b75b30 DG |
2026 | strncpy(tmp[i].name, uevent->attr.name, LTTNG_SYMBOL_NAME_LEN); |
2027 | tmp[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2028 | tmp[i].enabled = uevent->enabled; | |
2029 | switch (uevent->attr.instrumentation) { | |
2030 | case LTTNG_UST_TRACEPOINT: | |
2031 | tmp[i].type = LTTNG_EVENT_TRACEPOINT; | |
2032 | break; | |
2033 | case LTTNG_UST_PROBE: | |
2034 | tmp[i].type = LTTNG_EVENT_PROBE; | |
2035 | break; | |
2036 | case LTTNG_UST_FUNCTION: | |
2037 | tmp[i].type = LTTNG_EVENT_FUNCTION; | |
2038 | break; | |
0cda4f28 | 2039 | } |
8005f29a | 2040 | tmp[i].loglevel = uevent->attr.loglevel; |
0cda4f28 | 2041 | switch (uevent->attr.loglevel_type) { |
8005f29a | 2042 | case LTTNG_UST_LOGLEVEL_ALL: |
22e25b71 | 2043 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; |
0cda4f28 | 2044 | break; |
8005f29a | 2045 | case LTTNG_UST_LOGLEVEL_RANGE: |
22e25b71 | 2046 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; |
8005f29a MD |
2047 | break; |
2048 | case LTTNG_UST_LOGLEVEL_SINGLE: | |
22e25b71 | 2049 | tmp[i].loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; |
ac3bd9c0 | 2050 | break; |
9f19cc17 | 2051 | } |
d7b75b30 | 2052 | i++; |
9f19cc17 DG |
2053 | } |
2054 | ||
b551a063 DG |
2055 | ret = nb_event; |
2056 | *events = tmp; | |
2057 | ||
2058 | error: | |
2059 | rcu_read_unlock(); | |
2060 | return ret; | |
9f19cc17 DG |
2061 | } |
2062 | ||
2063 | /* | |
b551a063 | 2064 | * Fill lttng_event array of all kernel events in the channel. |
9f19cc17 | 2065 | */ |
b551a063 DG |
2066 | static int list_lttng_kernel_events(char *channel_name, |
2067 | struct ltt_kernel_session *kernel_session, struct lttng_event **events) | |
9f19cc17 | 2068 | { |
b551a063 DG |
2069 | int i = 0, ret; |
2070 | unsigned int nb_event; | |
9f19cc17 | 2071 | struct ltt_kernel_event *event; |
b551a063 DG |
2072 | struct ltt_kernel_channel *kchan; |
2073 | ||
2074 | kchan = trace_kernel_get_channel_by_name(channel_name, kernel_session); | |
2075 | if (kchan == NULL) { | |
2076 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2077 | goto error; | |
2078 | } | |
2079 | ||
2080 | nb_event = kchan->event_count; | |
9f19cc17 DG |
2081 | |
2082 | DBG("Listing events for channel %s", kchan->channel->name); | |
2083 | ||
b551a063 DG |
2084 | if (nb_event == 0) { |
2085 | ret = nb_event; | |
2086 | goto error; | |
2087 | } | |
2088 | ||
2089 | *events = zmalloc(nb_event * sizeof(struct lttng_event)); | |
2090 | if (*events == NULL) { | |
2091 | ret = LTTCOMM_FATAL; | |
2092 | goto error; | |
2093 | } | |
2094 | ||
9f19cc17 DG |
2095 | /* Kernel channels */ |
2096 | cds_list_for_each_entry(event, &kchan->events_list.head , list) { | |
b551a063 DG |
2097 | strncpy((*events)[i].name, event->event->name, LTTNG_SYMBOL_NAME_LEN); |
2098 | (*events)[i].name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
2099 | (*events)[i].enabled = event->enabled; | |
9f19cc17 DG |
2100 | switch (event->event->instrumentation) { |
2101 | case LTTNG_KERNEL_TRACEPOINT: | |
b551a063 | 2102 | (*events)[i].type = LTTNG_EVENT_TRACEPOINT; |
9f19cc17 DG |
2103 | break; |
2104 | case LTTNG_KERNEL_KPROBE: | |
2105 | case LTTNG_KERNEL_KRETPROBE: | |
b551a063 DG |
2106 | (*events)[i].type = LTTNG_EVENT_PROBE; |
2107 | memcpy(&(*events)[i].attr.probe, &event->event->u.kprobe, | |
9f19cc17 DG |
2108 | sizeof(struct lttng_kernel_kprobe)); |
2109 | break; | |
2110 | case LTTNG_KERNEL_FUNCTION: | |
b551a063 DG |
2111 | (*events)[i].type = LTTNG_EVENT_FUNCTION; |
2112 | memcpy(&((*events)[i].attr.ftrace), &event->event->u.ftrace, | |
9f19cc17 DG |
2113 | sizeof(struct lttng_kernel_function)); |
2114 | break; | |
0133c199 | 2115 | case LTTNG_KERNEL_NOOP: |
b551a063 | 2116 | (*events)[i].type = LTTNG_EVENT_NOOP; |
0133c199 | 2117 | break; |
a54bd42d | 2118 | case LTTNG_KERNEL_SYSCALL: |
b551a063 | 2119 | (*events)[i].type = LTTNG_EVENT_SYSCALL; |
0133c199 | 2120 | break; |
7a3d1328 MD |
2121 | case LTTNG_KERNEL_ALL: |
2122 | assert(0); | |
2123 | break; | |
9f19cc17 DG |
2124 | } |
2125 | i++; | |
2126 | } | |
b551a063 DG |
2127 | |
2128 | return nb_event; | |
2129 | ||
2130 | error: | |
2131 | return ret; | |
9f19cc17 DG |
2132 | } |
2133 | ||
fac6795d | 2134 | /* |
54d01ffb | 2135 | * Command LTTNG_DISABLE_CHANNEL processed by the client thread. |
fac6795d | 2136 | */ |
54d01ffb DG |
2137 | static int cmd_disable_channel(struct ltt_session *session, |
2138 | int domain, char *channel_name) | |
fac6795d | 2139 | { |
54d01ffb | 2140 | int ret; |
78f0bacd DG |
2141 | struct ltt_ust_session *usess; |
2142 | ||
2143 | usess = session->ust_session; | |
379473d2 | 2144 | |
54d01ffb | 2145 | switch (domain) { |
78f0bacd DG |
2146 | case LTTNG_DOMAIN_KERNEL: |
2147 | { | |
2148 | ret = channel_kernel_disable(session->kernel_session, | |
2149 | channel_name); | |
2150 | if (ret != LTTCOMM_OK) { | |
2151 | goto error; | |
2152 | } | |
54d01ffb | 2153 | |
78f0bacd DG |
2154 | kernel_wait_quiescent(kernel_tracer_fd); |
2155 | break; | |
2156 | } | |
2157 | case LTTNG_DOMAIN_UST: | |
2158 | { | |
2159 | struct ltt_ust_channel *uchan; | |
bec39940 | 2160 | struct lttng_ht *chan_ht; |
78f0bacd | 2161 | |
7885e399 DG |
2162 | chan_ht = usess->domain_global.channels; |
2163 | ||
2164 | uchan = trace_ust_find_channel_by_name(chan_ht, channel_name); | |
78f0bacd DG |
2165 | if (uchan == NULL) { |
2166 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
54d01ffb | 2167 | goto error; |
78f0bacd DG |
2168 | } |
2169 | ||
7885e399 DG |
2170 | ret = channel_ust_disable(usess, domain, uchan); |
2171 | if (ret != LTTCOMM_OK) { | |
78f0bacd DG |
2172 | goto error; |
2173 | } | |
78f0bacd DG |
2174 | break; |
2175 | } | |
d78d6610 | 2176 | #if 0 |
78f0bacd DG |
2177 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2178 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
2179 | case LTTNG_DOMAIN_UST_PID: | |
d78d6610 | 2180 | #endif |
78f0bacd DG |
2181 | default: |
2182 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2183 | goto error; | |
20fe2104 DG |
2184 | } |
2185 | ||
54d01ffb | 2186 | ret = LTTCOMM_OK; |
d65106b1 | 2187 | |
54d01ffb DG |
2188 | error: |
2189 | return ret; | |
2190 | } | |
2191 | ||
2192 | /* | |
2193 | * Command LTTNG_ENABLE_CHANNEL processed by the client thread. | |
2194 | */ | |
44d3bd01 | 2195 | static int cmd_enable_channel(struct ltt_session *session, |
aea829b3 | 2196 | int domain, struct lttng_channel *attr) |
54d01ffb DG |
2197 | { |
2198 | int ret; | |
f6a9efaa | 2199 | struct ltt_ust_session *usess = session->ust_session; |
bec39940 | 2200 | struct lttng_ht *chan_ht; |
f6a9efaa | 2201 | |
5d56b5aa | 2202 | DBG("Enabling channel %s for session %s", attr->name, session->name); |
d65106b1 | 2203 | |
aea829b3 | 2204 | switch (domain) { |
44d3bd01 DG |
2205 | case LTTNG_DOMAIN_KERNEL: |
2206 | { | |
2207 | struct ltt_kernel_channel *kchan; | |
54d01ffb | 2208 | |
44d3bd01 DG |
2209 | kchan = trace_kernel_get_channel_by_name(attr->name, |
2210 | session->kernel_session); | |
2211 | if (kchan == NULL) { | |
2212 | ret = channel_kernel_create(session->kernel_session, | |
2213 | attr, kernel_poll_pipe[1]); | |
2214 | } else { | |
2215 | ret = channel_kernel_enable(session->kernel_session, kchan); | |
2216 | } | |
2217 | ||
2218 | if (ret != LTTCOMM_OK) { | |
2219 | goto error; | |
2220 | } | |
2221 | ||
2222 | kernel_wait_quiescent(kernel_tracer_fd); | |
2223 | break; | |
2224 | } | |
f6a9efaa DG |
2225 | case LTTNG_DOMAIN_UST: |
2226 | { | |
2227 | struct ltt_ust_channel *uchan; | |
2228 | ||
7885e399 | 2229 | chan_ht = usess->domain_global.channels; |
f6a9efaa | 2230 | |
7885e399 | 2231 | uchan = trace_ust_find_channel_by_name(chan_ht, attr->name); |
f6a9efaa | 2232 | if (uchan == NULL) { |
7885e399 | 2233 | ret = channel_ust_create(usess, domain, attr); |
f6a9efaa | 2234 | } else { |
7885e399 | 2235 | ret = channel_ust_enable(usess, domain, uchan); |
48842b30 | 2236 | } |
f6a9efaa DG |
2237 | break; |
2238 | } | |
d78d6610 | 2239 | #if 0 |
78f0bacd DG |
2240 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: |
2241 | case LTTNG_DOMAIN_UST_EXEC_NAME: | |
44d3bd01 | 2242 | case LTTNG_DOMAIN_UST_PID: |
d78d6610 | 2243 | #endif |
44d3bd01 DG |
2244 | default: |
2245 | ret = LTTCOMM_UNKNOWN_DOMAIN; | |
2246 | goto error; | |
54d01ffb DG |
2247 | } |
2248 | ||
54d01ffb DG |
2249 | error: |
2250 | return ret; | |
2251 | } | |
2252 | ||
2253 | /* | |
2254 | * Command LTTNG_DISABLE_EVENT processed by the client thread. | |
2255 | */ | |
2256 | static int cmd_disable_event(struct ltt_session *session, int domain, | |
2257 | char *channel_name, char *event_name) | |
2258 | { | |
2259 | int ret; | |
54d01ffb DG |
2260 | |
2261 | switch (domain) { | |
2262 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2263 | { |
2264 | struct ltt_kernel_channel *kchan; | |
b0a40d28 | 2265 | struct ltt_kernel_session *ksess; |
2bdd86d4 | 2266 | |
b0a40d28 DG |
2267 | ksess = session->kernel_session; |
2268 | ||
2269 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2270 | if (kchan == NULL) { |
2271 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2272 | goto error; | |
d65106b1 DG |
2273 | } |
2274 | ||
b0a40d28 | 2275 | ret = event_kernel_disable_tracepoint(ksess, kchan, event_name); |
54d01ffb DG |
2276 | if (ret != LTTCOMM_OK) { |
2277 | goto error; | |
2278 | } | |
2279 | ||
2280 | kernel_wait_quiescent(kernel_tracer_fd); | |
d65106b1 | 2281 | break; |
2bdd86d4 MD |
2282 | } |
2283 | case LTTNG_DOMAIN_UST: | |
b0a40d28 | 2284 | { |
b0a40d28 | 2285 | struct ltt_ust_channel *uchan; |
7f79d3a1 | 2286 | struct ltt_ust_session *usess; |
b0a40d28 DG |
2287 | |
2288 | usess = session->ust_session; | |
2289 | ||
2290 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2291 | channel_name); | |
2292 | if (uchan == NULL) { | |
2293 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2294 | goto error; | |
2295 | } | |
2296 | ||
7f79d3a1 DG |
2297 | ret = event_ust_disable_tracepoint(usess, domain, uchan, event_name); |
2298 | if (ret != LTTCOMM_OK) { | |
b0a40d28 DG |
2299 | goto error; |
2300 | } | |
2301 | ||
7f79d3a1 | 2302 | DBG3("Disable UST event %s in channel %s completed", event_name, |
b0a40d28 | 2303 | channel_name); |
b0a40d28 DG |
2304 | break; |
2305 | } | |
d78d6610 | 2306 | #if 0 |
2bdd86d4 MD |
2307 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2308 | case LTTNG_DOMAIN_UST_PID: | |
2309 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2310 | #endif |
54d01ffb | 2311 | default: |
1ab1ea0b | 2312 | ret = LTTCOMM_UND; |
54d01ffb | 2313 | goto error; |
d65106b1 | 2314 | } |
26cc6b4e | 2315 | |
54d01ffb DG |
2316 | ret = LTTCOMM_OK; |
2317 | ||
2318 | error: | |
2319 | return ret; | |
2320 | } | |
2321 | ||
2322 | /* | |
2323 | * Command LTTNG_DISABLE_ALL_EVENT processed by the client thread. | |
2324 | */ | |
2325 | static int cmd_disable_event_all(struct ltt_session *session, int domain, | |
2326 | char *channel_name) | |
2327 | { | |
2328 | int ret; | |
54d01ffb DG |
2329 | |
2330 | switch (domain) { | |
2331 | case LTTNG_DOMAIN_KERNEL: | |
9730260e DG |
2332 | { |
2333 | struct ltt_kernel_session *ksess; | |
2334 | struct ltt_kernel_channel *kchan; | |
2335 | ||
2336 | ksess = session->kernel_session; | |
2337 | ||
2338 | kchan = trace_kernel_get_channel_by_name(channel_name, ksess); | |
54d01ffb DG |
2339 | if (kchan == NULL) { |
2340 | ret = LTTCOMM_KERN_CHAN_NOT_FOUND; | |
2341 | goto error; | |
26cc6b4e DG |
2342 | } |
2343 | ||
9730260e | 2344 | ret = event_kernel_disable_all(ksess, kchan); |
54d01ffb | 2345 | if (ret != LTTCOMM_OK) { |
0b97ec54 | 2346 | goto error; |
26cc6b4e DG |
2347 | } |
2348 | ||
54d01ffb | 2349 | kernel_wait_quiescent(kernel_tracer_fd); |
26cc6b4e | 2350 | break; |
9730260e DG |
2351 | } |
2352 | case LTTNG_DOMAIN_UST: | |
2353 | { | |
2354 | struct ltt_ust_session *usess; | |
2355 | struct ltt_ust_channel *uchan; | |
2356 | ||
2357 | usess = session->ust_session; | |
2358 | ||
2359 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2360 | channel_name); | |
2361 | if (uchan == NULL) { | |
2362 | ret = LTTCOMM_UST_CHAN_NOT_FOUND; | |
2363 | goto error; | |
2364 | } | |
2365 | ||
7f79d3a1 DG |
2366 | ret = event_ust_disable_all_tracepoints(usess, domain, uchan); |
2367 | if (ret != 0) { | |
9730260e DG |
2368 | goto error; |
2369 | } | |
2370 | ||
7f79d3a1 | 2371 | DBG3("Disable all UST events in channel %s completed", channel_name); |
9730260e DG |
2372 | |
2373 | break; | |
2374 | } | |
d78d6610 | 2375 | #if 0 |
9730260e DG |
2376 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2377 | case LTTNG_DOMAIN_UST_PID: | |
2378 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2379 | #endif |
54d01ffb | 2380 | default: |
1ab1ea0b | 2381 | ret = LTTCOMM_UND; |
54d01ffb | 2382 | goto error; |
26cc6b4e | 2383 | } |
e953ef25 | 2384 | |
54d01ffb | 2385 | ret = LTTCOMM_OK; |
e953ef25 | 2386 | |
54d01ffb DG |
2387 | error: |
2388 | return ret; | |
2389 | } | |
f5177a38 | 2390 | |
54d01ffb DG |
2391 | /* |
2392 | * Command LTTNG_ADD_CONTEXT processed by the client thread. | |
2393 | */ | |
2394 | static int cmd_add_context(struct ltt_session *session, int domain, | |
2395 | char *channel_name, char *event_name, struct lttng_event_context *ctx) | |
2396 | { | |
2397 | int ret; | |
f5177a38 | 2398 | |
54d01ffb DG |
2399 | switch (domain) { |
2400 | case LTTNG_DOMAIN_KERNEL: | |
2401 | /* Add kernel context to kernel tracer */ | |
2402 | ret = context_kernel_add(session->kernel_session, ctx, | |
2403 | event_name, channel_name); | |
2404 | if (ret != LTTCOMM_OK) { | |
f5177a38 | 2405 | goto error; |
e953ef25 | 2406 | } |
2bdd86d4 MD |
2407 | break; |
2408 | case LTTNG_DOMAIN_UST: | |
2409 | { | |
55cc08a6 | 2410 | struct ltt_ust_session *usess = session->ust_session; |
e953ef25 | 2411 | |
55cc08a6 DG |
2412 | ret = context_ust_add(usess, domain, ctx, event_name, channel_name); |
2413 | if (ret != LTTCOMM_OK) { | |
2414 | goto error; | |
2bdd86d4 | 2415 | } |
e953ef25 | 2416 | break; |
2bdd86d4 | 2417 | } |
d78d6610 | 2418 | #if 0 |
55cc08a6 DG |
2419 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2420 | case LTTNG_DOMAIN_UST_PID: | |
2421 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2422 | #endif |
54d01ffb | 2423 | default: |
1ab1ea0b | 2424 | ret = LTTCOMM_UND; |
54d01ffb | 2425 | goto error; |
e953ef25 | 2426 | } |
950131af | 2427 | |
54d01ffb | 2428 | ret = LTTCOMM_OK; |
950131af | 2429 | |
54d01ffb DG |
2430 | error: |
2431 | return ret; | |
2432 | } | |
2433 | ||
2434 | /* | |
2435 | * Command LTTNG_ENABLE_EVENT processed by the client thread. | |
2436 | */ | |
2437 | static int cmd_enable_event(struct ltt_session *session, int domain, | |
2438 | char *channel_name, struct lttng_event *event) | |
2439 | { | |
2440 | int ret; | |
f6cd6b0f | 2441 | struct lttng_channel *attr; |
48842b30 | 2442 | struct ltt_ust_session *usess = session->ust_session; |
54d01ffb DG |
2443 | |
2444 | switch (domain) { | |
2445 | case LTTNG_DOMAIN_KERNEL: | |
2bdd86d4 MD |
2446 | { |
2447 | struct ltt_kernel_channel *kchan; | |
2448 | ||
54d01ffb DG |
2449 | kchan = trace_kernel_get_channel_by_name(channel_name, |
2450 | session->kernel_session); | |
2451 | if (kchan == NULL) { | |
f6cd6b0f DG |
2452 | attr = channel_new_default_attr(domain); |
2453 | if (attr == NULL) { | |
2454 | ret = LTTCOMM_FATAL; | |
2455 | goto error; | |
2456 | } | |
2457 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2458 | ||
54d01ffb | 2459 | /* This call will notify the kernel thread */ |
44d3bd01 | 2460 | ret = channel_kernel_create(session->kernel_session, |
f6cd6b0f | 2461 | attr, kernel_poll_pipe[1]); |
54d01ffb | 2462 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2463 | free(attr); |
f5177a38 DG |
2464 | goto error; |
2465 | } | |
ff4d74e6 | 2466 | free(attr); |
54d01ffb | 2467 | } |
950131af | 2468 | |
54d01ffb DG |
2469 | /* Get the newly created kernel channel pointer */ |
2470 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2471 | session->kernel_session); | |
2472 | if (kchan == NULL) { | |
2473 | /* This sould not happen... */ | |
2474 | ret = LTTCOMM_FATAL; | |
2475 | goto error; | |
2476 | } | |
f5177a38 | 2477 | |
48842b30 DG |
2478 | ret = event_kernel_enable_tracepoint(session->kernel_session, kchan, |
2479 | event); | |
54d01ffb | 2480 | if (ret != LTTCOMM_OK) { |
f5177a38 | 2481 | goto error; |
950131af DG |
2482 | } |
2483 | ||
54d01ffb | 2484 | kernel_wait_quiescent(kernel_tracer_fd); |
950131af | 2485 | break; |
2bdd86d4 MD |
2486 | } |
2487 | case LTTNG_DOMAIN_UST: | |
2488 | { | |
aea829b3 | 2489 | struct lttng_channel *attr; |
edb67388 | 2490 | struct ltt_ust_channel *uchan; |
2bdd86d4 | 2491 | |
edb67388 | 2492 | /* Get channel from global UST domain */ |
48842b30 DG |
2493 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, |
2494 | channel_name); | |
2495 | if (uchan == NULL) { | |
aea829b3 DG |
2496 | /* Create default channel */ |
2497 | attr = channel_new_default_attr(domain); | |
2498 | if (attr == NULL) { | |
2499 | ret = LTTCOMM_FATAL; | |
2500 | goto error; | |
2501 | } | |
596219f7 | 2502 | snprintf(attr->name, NAME_MAX, "%s", channel_name); |
edb67388 | 2503 | attr->name[NAME_MAX - 1] = '\0'; |
aea829b3 | 2504 | |
7885e399 | 2505 | ret = channel_ust_create(usess, domain, attr); |
edb67388 | 2506 | if (ret != LTTCOMM_OK) { |
ff4d74e6 | 2507 | free(attr); |
aea829b3 DG |
2508 | goto error; |
2509 | } | |
aea829b3 DG |
2510 | free(attr); |
2511 | ||
2512 | /* Get the newly created channel reference back */ | |
2513 | uchan = trace_ust_find_channel_by_name( | |
2514 | usess->domain_global.channels, channel_name); | |
2515 | if (uchan == NULL) { | |
2516 | /* Something is really wrong */ | |
2517 | ret = LTTCOMM_FATAL; | |
2518 | goto error; | |
2519 | } | |
48842b30 | 2520 | } |
2bdd86d4 | 2521 | |
edb67388 | 2522 | /* At this point, the session and channel exist on the tracer */ |
edb67388 DG |
2523 | ret = event_ust_enable_tracepoint(usess, domain, uchan, event); |
2524 | if (ret != LTTCOMM_OK) { | |
48842b30 | 2525 | goto error; |
2bdd86d4 MD |
2526 | } |
2527 | break; | |
2528 | } | |
d78d6610 | 2529 | #if 0 |
2bdd86d4 MD |
2530 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2531 | case LTTNG_DOMAIN_UST_PID: | |
2532 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2533 | #endif |
54d01ffb | 2534 | default: |
1ab1ea0b | 2535 | ret = LTTCOMM_UND; |
54d01ffb | 2536 | goto error; |
950131af | 2537 | } |
d36b8583 | 2538 | |
54d01ffb | 2539 | ret = LTTCOMM_OK; |
d36b8583 | 2540 | |
54d01ffb DG |
2541 | error: |
2542 | return ret; | |
2543 | } | |
7d29a247 | 2544 | |
54d01ffb DG |
2545 | /* |
2546 | * Command LTTNG_ENABLE_ALL_EVENT processed by the client thread. | |
2547 | */ | |
2548 | static int cmd_enable_event_all(struct ltt_session *session, int domain, | |
8c9ae521 | 2549 | char *channel_name, int event_type) |
54d01ffb DG |
2550 | { |
2551 | int ret; | |
2552 | struct ltt_kernel_channel *kchan; | |
7d29a247 | 2553 | |
54d01ffb DG |
2554 | switch (domain) { |
2555 | case LTTNG_DOMAIN_KERNEL: | |
2556 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2557 | session->kernel_session); | |
2558 | if (kchan == NULL) { | |
2559 | /* This call will notify the kernel thread */ | |
44d3bd01 DG |
2560 | ret = channel_kernel_create(session->kernel_session, NULL, |
2561 | kernel_poll_pipe[1]); | |
54d01ffb DG |
2562 | if (ret != LTTCOMM_OK) { |
2563 | goto error; | |
d36b8583 | 2564 | } |
0d0c377a | 2565 | |
8f69e5eb DG |
2566 | /* Get the newly created kernel channel pointer */ |
2567 | kchan = trace_kernel_get_channel_by_name(channel_name, | |
2568 | session->kernel_session); | |
2569 | if (kchan == NULL) { | |
2570 | /* This sould not happen... */ | |
2571 | ret = LTTCOMM_FATAL; | |
2572 | goto error; | |
2573 | } | |
2574 | ||
54d01ffb | 2575 | } |
0fdd1e2c | 2576 | |
7a3d1328 | 2577 | switch (event_type) { |
76d45b40 | 2578 | case LTTNG_EVENT_SYSCALL: |
7a3d1328 | 2579 | ret = event_kernel_enable_all_syscalls(session->kernel_session, |
8c9ae521 | 2580 | kchan, kernel_tracer_fd); |
7a3d1328 | 2581 | break; |
76d45b40 | 2582 | case LTTNG_EVENT_TRACEPOINT: |
8c9ae521 | 2583 | /* |
7a3d1328 MD |
2584 | * This call enables all LTTNG_KERNEL_TRACEPOINTS and |
2585 | * events already registered to the channel. | |
8c9ae521 | 2586 | */ |
7a3d1328 MD |
2587 | ret = event_kernel_enable_all_tracepoints(session->kernel_session, |
2588 | kchan, kernel_tracer_fd); | |
2589 | break; | |
76d45b40 | 2590 | case LTTNG_EVENT_ALL: |
7a3d1328 | 2591 | /* Enable syscalls and tracepoints */ |
8c9ae521 DG |
2592 | ret = event_kernel_enable_all(session->kernel_session, |
2593 | kchan, kernel_tracer_fd); | |
7a3d1328 MD |
2594 | break; |
2595 | default: | |
2596 | ret = LTTCOMM_KERN_ENABLE_FAIL; | |
2597 | goto error; | |
8c9ae521 | 2598 | } |
8f69e5eb DG |
2599 | |
2600 | /* Manage return value */ | |
54d01ffb | 2601 | if (ret != LTTCOMM_OK) { |
0d0c377a | 2602 | goto error; |
d36b8583 DG |
2603 | } |
2604 | ||
54d01ffb | 2605 | kernel_wait_quiescent(kernel_tracer_fd); |
d36b8583 | 2606 | break; |
76d45b40 DG |
2607 | case LTTNG_DOMAIN_UST: |
2608 | { | |
2609 | struct lttng_channel *attr; | |
2610 | struct ltt_ust_channel *uchan; | |
2611 | struct ltt_ust_session *usess = session->ust_session; | |
2612 | ||
2613 | /* Get channel from global UST domain */ | |
2614 | uchan = trace_ust_find_channel_by_name(usess->domain_global.channels, | |
2615 | channel_name); | |
2616 | if (uchan == NULL) { | |
2617 | /* Create default channel */ | |
2618 | attr = channel_new_default_attr(domain); | |
2619 | if (attr == NULL) { | |
2620 | ret = LTTCOMM_FATAL; | |
2621 | goto error; | |
2622 | } | |
2623 | snprintf(attr->name, NAME_MAX, "%s", channel_name); | |
2624 | attr->name[NAME_MAX - 1] = '\0'; | |
2625 | ||
2626 | /* Use the internal command enable channel */ | |
7885e399 | 2627 | ret = channel_ust_create(usess, domain, attr); |
76d45b40 DG |
2628 | if (ret != LTTCOMM_OK) { |
2629 | free(attr); | |
2630 | goto error; | |
2631 | } | |
2632 | free(attr); | |
2633 | ||
2634 | /* Get the newly created channel reference back */ | |
2635 | uchan = trace_ust_find_channel_by_name( | |
2636 | usess->domain_global.channels, channel_name); | |
2637 | if (uchan == NULL) { | |
2638 | /* Something is really wrong */ | |
2639 | ret = LTTCOMM_FATAL; | |
2640 | goto error; | |
2641 | } | |
2642 | } | |
2643 | ||
2644 | /* At this point, the session and channel exist on the tracer */ | |
2645 | ||
2646 | switch (event_type) { | |
2647 | case LTTNG_EVENT_ALL: | |
2648 | case LTTNG_EVENT_TRACEPOINT: | |
2649 | ret = event_ust_enable_all_tracepoints(usess, domain, uchan); | |
2650 | if (ret != LTTCOMM_OK) { | |
2651 | goto error; | |
2652 | } | |
2653 | break; | |
2654 | default: | |
2655 | ret = LTTCOMM_UST_ENABLE_FAIL; | |
2656 | goto error; | |
2657 | } | |
2658 | ||
2659 | /* Manage return value */ | |
2660 | if (ret != LTTCOMM_OK) { | |
2661 | goto error; | |
2662 | } | |
2663 | ||
2664 | break; | |
2665 | } | |
d78d6610 | 2666 | #if 0 |
76d45b40 DG |
2667 | case LTTNG_DOMAIN_UST_EXEC_NAME: |
2668 | case LTTNG_DOMAIN_UST_PID: | |
2669 | case LTTNG_DOMAIN_UST_PID_FOLLOW_CHILDREN: | |
d78d6610 | 2670 | #endif |
54d01ffb | 2671 | default: |
1ab1ea0b | 2672 | ret = LTTCOMM_UND; |
54d01ffb | 2673 | goto error; |
d36b8583 | 2674 | } |
f3ed775e | 2675 | |
54d01ffb DG |
2676 | ret = LTTCOMM_OK; |
2677 | ||
2678 | error: | |
2679 | return ret; | |
2680 | } | |
2681 | ||
2682 | /* | |
2683 | * Command LTTNG_LIST_TRACEPOINTS processed by the client thread. | |
2684 | */ | |
2685 | static ssize_t cmd_list_tracepoints(int domain, struct lttng_event **events) | |
2686 | { | |
2687 | int ret; | |
2688 | ssize_t nb_events = 0; | |
2689 | ||
2690 | switch (domain) { | |
2691 | case LTTNG_DOMAIN_KERNEL: | |
2692 | nb_events = kernel_list_events(kernel_tracer_fd, events); | |
2693 | if (nb_events < 0) { | |
2694 | ret = LTTCOMM_KERN_LIST_FAIL; | |
2695 | goto error; | |
894be886 | 2696 | } |
54d01ffb | 2697 | break; |
b551a063 DG |
2698 | case LTTNG_DOMAIN_UST: |
2699 | nb_events = ust_app_list_events(events); | |
2700 | if (nb_events < 0) { | |
2701 | ret = LTTCOMM_UST_LIST_FAIL; | |
2702 | goto error; | |
2703 | } | |
2704 | break; | |
54d01ffb | 2705 | default: |
1ab1ea0b | 2706 | ret = LTTCOMM_UND; |
54d01ffb DG |
2707 | goto error; |
2708 | } | |
894be886 | 2709 | |
54d01ffb | 2710 | return nb_events; |
7d29a247 | 2711 | |
54d01ffb DG |
2712 | error: |
2713 | /* Return negative value to differentiate return code */ | |
2714 | return -ret; | |
2715 | } | |
b389abbe | 2716 | |
f37d259d MD |
2717 | /* |
2718 | * Command LTTNG_LIST_TRACEPOINT_FIELDS processed by the client thread. | |
2719 | */ | |
2720 | static ssize_t cmd_list_tracepoint_fields(int domain, | |
2721 | struct lttng_event_field **fields) | |
2722 | { | |
2723 | int ret; | |
2724 | ssize_t nb_fields = 0; | |
2725 | ||
2726 | switch (domain) { | |
2727 | case LTTNG_DOMAIN_UST: | |
2728 | nb_fields = ust_app_list_event_fields(fields); | |
2729 | if (nb_fields < 0) { | |
2730 | ret = LTTCOMM_UST_LIST_FAIL; | |
2731 | goto error; | |
2732 | } | |
2733 | break; | |
2734 | case LTTNG_DOMAIN_KERNEL: | |
2735 | default: /* fall-through */ | |
2736 | ret = LTTCOMM_UND; | |
2737 | goto error; | |
2738 | } | |
2739 | ||
2740 | return nb_fields; | |
2741 | ||
2742 | error: | |
2743 | /* Return negative value to differentiate return code */ | |
2744 | return -ret; | |
2745 | } | |
2746 | ||
54d01ffb DG |
2747 | /* |
2748 | * Command LTTNG_START_TRACE processed by the client thread. | |
2749 | */ | |
2750 | static int cmd_start_trace(struct ltt_session *session) | |
2751 | { | |
2752 | int ret; | |
54d01ffb | 2753 | struct ltt_kernel_session *ksession; |
b9d9b220 | 2754 | struct ltt_ust_session *usess; |
b389abbe | 2755 | |
54d01ffb DG |
2756 | /* Short cut */ |
2757 | ksession = session->kernel_session; | |
b9d9b220 | 2758 | usess = session->ust_session; |
5eb91c98 | 2759 | |
b9ef1c83 | 2760 | if (session->enabled) { |
80e327fa DG |
2761 | /* Already started. */ |
2762 | ret = LTTCOMM_TRACE_ALREADY_STARTED; | |
b9ef1c83 DG |
2763 | goto error; |
2764 | } | |
2765 | ||
464dd62d MD |
2766 | session->enabled = 1; |
2767 | ||
54d01ffb DG |
2768 | /* Kernel tracing */ |
2769 | if (ksession != NULL) { | |
2bdd86d4 MD |
2770 | struct ltt_kernel_channel *kchan; |
2771 | ||
54d01ffb DG |
2772 | /* Open kernel metadata */ |
2773 | if (ksession->metadata == NULL) { | |
2774 | ret = kernel_open_metadata(ksession, ksession->trace_path); | |
2775 | if (ret < 0) { | |
2776 | ret = LTTCOMM_KERN_META_FAIL; | |
2777 | goto error; | |
b389abbe | 2778 | } |
54d01ffb | 2779 | } |
7d29a247 | 2780 | |
54d01ffb | 2781 | /* Open kernel metadata stream */ |
03550b58 | 2782 | if (ksession->metadata_stream_fd < 0) { |
54d01ffb DG |
2783 | ret = kernel_open_metadata_stream(ksession); |
2784 | if (ret < 0) { | |
2785 | ERR("Kernel create metadata stream failed"); | |
2786 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
2787 | goto error; | |
2788 | } | |
2789 | } | |
2790 | ||
2791 | /* For each channel */ | |
2792 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { | |
2793 | if (kchan->stream_count == 0) { | |
2794 | ret = kernel_open_channel_stream(kchan); | |
2795 | if (ret < 0) { | |
2796 | ret = LTTCOMM_KERN_STREAM_FAIL; | |
7d29a247 DG |
2797 | goto error; |
2798 | } | |
54d01ffb DG |
2799 | /* Update the stream global counter */ |
2800 | ksession->stream_count_global += ret; | |
7d29a247 | 2801 | } |
54d01ffb DG |
2802 | } |
2803 | ||
2804 | /* Setup kernel consumer socket and send fds to it */ | |
2805 | ret = init_kernel_tracing(ksession); | |
2806 | if (ret < 0) { | |
2807 | ret = LTTCOMM_KERN_START_FAIL; | |
2808 | goto error; | |
2809 | } | |
2810 | ||
2811 | /* This start the kernel tracing */ | |
2812 | ret = kernel_start_session(ksession); | |
2813 | if (ret < 0) { | |
2814 | ret = LTTCOMM_KERN_START_FAIL; | |
2815 | goto error; | |
2816 | } | |
2817 | ||
2818 | /* Quiescent wait after starting trace */ | |
2819 | kernel_wait_quiescent(kernel_tracer_fd); | |
2820 | } | |
2821 | ||
36dc12cc | 2822 | /* Flag session that trace should start automatically */ |
b9d9b220 DG |
2823 | if (usess) { |
2824 | usess->start_trace = 1; | |
36dc12cc | 2825 | |
b9d9b220 DG |
2826 | ret = ust_app_start_trace_all(usess); |
2827 | if (ret < 0) { | |
2828 | ret = LTTCOMM_UST_START_FAIL; | |
2829 | goto error; | |
2830 | } | |
2bdd86d4 | 2831 | } |
54d01ffb DG |
2832 | |
2833 | ret = LTTCOMM_OK; | |
2834 | ||
2835 | error: | |
2836 | return ret; | |
2837 | } | |
2838 | ||
2839 | /* | |
2840 | * Command LTTNG_STOP_TRACE processed by the client thread. | |
2841 | */ | |
2842 | static int cmd_stop_trace(struct ltt_session *session) | |
2843 | { | |
2844 | int ret; | |
2845 | struct ltt_kernel_channel *kchan; | |
2846 | struct ltt_kernel_session *ksession; | |
8be98f9a | 2847 | struct ltt_ust_session *usess; |
54d01ffb DG |
2848 | |
2849 | /* Short cut */ | |
2850 | ksession = session->kernel_session; | |
8be98f9a | 2851 | usess = session->ust_session; |
54d01ffb | 2852 | |
b9ef1c83 | 2853 | if (!session->enabled) { |
80e327fa | 2854 | ret = LTTCOMM_TRACE_ALREADY_STOPPED; |
b9ef1c83 DG |
2855 | goto error; |
2856 | } | |
2857 | ||
464dd62d MD |
2858 | session->enabled = 0; |
2859 | ||
54d01ffb DG |
2860 | /* Kernel tracer */ |
2861 | if (ksession != NULL) { | |
2862 | DBG("Stop kernel tracing"); | |
2863 | ||
2864 | /* Flush all buffers before stopping */ | |
2865 | ret = kernel_metadata_flush_buffer(ksession->metadata_stream_fd); | |
2866 | if (ret < 0) { | |
2867 | ERR("Kernel metadata flush failed"); | |
2868 | } | |
f34daff7 | 2869 | |
54d01ffb DG |
2870 | cds_list_for_each_entry(kchan, &ksession->channel_list.head, list) { |
2871 | ret = kernel_flush_buffer(kchan); | |
0d0c377a | 2872 | if (ret < 0) { |
54d01ffb | 2873 | ERR("Kernel flush buffer error"); |
7d29a247 | 2874 | } |
54d01ffb | 2875 | } |
19e70852 | 2876 | |
54d01ffb DG |
2877 | ret = kernel_stop_session(ksession); |
2878 | if (ret < 0) { | |
2879 | ret = LTTCOMM_KERN_STOP_FAIL; | |
19e70852 | 2880 | goto error; |
f3ed775e | 2881 | } |
54d01ffb DG |
2882 | |
2883 | kernel_wait_quiescent(kernel_tracer_fd); | |
894be886 | 2884 | } |
54d01ffb | 2885 | |
8be98f9a MD |
2886 | if (usess) { |
2887 | usess->start_trace = 0; | |
2bdd86d4 | 2888 | |
8be98f9a | 2889 | ret = ust_app_stop_trace_all(usess); |
2bdd86d4 | 2890 | if (ret < 0) { |
190df5ac | 2891 | ret = LTTCOMM_UST_STOP_FAIL; |
2bdd86d4 MD |
2892 | goto error; |
2893 | } | |
2bdd86d4 | 2894 | } |
54d01ffb DG |
2895 | |
2896 | ret = LTTCOMM_OK; | |
2897 | ||
2898 | error: | |
2899 | return ret; | |
2900 | } | |
2901 | ||
2902 | /* | |
2903 | * Command LTTNG_CREATE_SESSION processed by the client thread. | |
2904 | */ | |
730389d9 | 2905 | static int cmd_create_session(char *name, char *path, lttng_sock_cred *creds) |
54d01ffb DG |
2906 | { |
2907 | int ret; | |
2908 | ||
730389d9 DG |
2909 | ret = session_create(name, path, LTTNG_SOCK_GET_UID_CRED(creds), |
2910 | LTTNG_SOCK_GET_GID_CRED(creds)); | |
54d01ffb DG |
2911 | if (ret != LTTCOMM_OK) { |
2912 | goto error; | |
2913 | } | |
2914 | ||
2915 | ret = LTTCOMM_OK; | |
2916 | ||
2917 | error: | |
2918 | return ret; | |
2919 | } | |
2920 | ||
2921 | /* | |
2922 | * Command LTTNG_DESTROY_SESSION processed by the client thread. | |
2923 | */ | |
2924 | static int cmd_destroy_session(struct ltt_session *session, char *name) | |
2925 | { | |
2926 | int ret; | |
2927 | ||
2928 | /* Clean kernel session teardown */ | |
2929 | teardown_kernel_session(session); | |
84cd17c6 MD |
2930 | /* UST session teardown */ |
2931 | teardown_ust_session(session); | |
54d01ffb DG |
2932 | |
2933 | /* | |
2934 | * Must notify the kernel thread here to update it's poll setin order | |
2935 | * to remove the channel(s)' fd just destroyed. | |
2936 | */ | |
2937 | ret = notify_thread_pipe(kernel_poll_pipe[1]); | |
2938 | if (ret < 0) { | |
76d7553f | 2939 | PERROR("write kernel poll pipe"); |
54d01ffb DG |
2940 | } |
2941 | ||
271933a4 | 2942 | ret = session_destroy(session); |
54d01ffb DG |
2943 | |
2944 | return ret; | |
2945 | } | |
2946 | ||
2947 | /* | |
2948 | * Command LTTNG_CALIBRATE processed by the client thread. | |
2949 | */ | |
2950 | static int cmd_calibrate(int domain, struct lttng_calibrate *calibrate) | |
2951 | { | |
2952 | int ret; | |
2953 | ||
2954 | switch (domain) { | |
2955 | case LTTNG_DOMAIN_KERNEL: | |
33a2b854 | 2956 | { |
54d01ffb | 2957 | struct lttng_kernel_calibrate kcalibrate; |
33a2b854 | 2958 | |
54d01ffb DG |
2959 | kcalibrate.type = calibrate->type; |
2960 | ret = kernel_calibrate(kernel_tracer_fd, &kcalibrate); | |
33a2b854 | 2961 | if (ret < 0) { |
54d01ffb DG |
2962 | ret = LTTCOMM_KERN_ENABLE_FAIL; |
2963 | goto error; | |
33a2b854 | 2964 | } |
54d01ffb DG |
2965 | break; |
2966 | } | |
4466912f DG |
2967 | case LTTNG_DOMAIN_UST: |
2968 | { | |
2969 | struct lttng_ust_calibrate ucalibrate; | |
2970 | ||
2971 | ucalibrate.type = calibrate->type; | |
2972 | ret = ust_app_calibrate_glb(&ucalibrate); | |
2973 | if (ret < 0) { | |
2974 | ret = LTTCOMM_UST_CALIBRATE_FAIL; | |
2975 | goto error; | |
2976 | } | |
2977 | break; | |
2978 | } | |
54d01ffb | 2979 | default: |
1ab1ea0b | 2980 | ret = LTTCOMM_UND; |
54d01ffb DG |
2981 | goto error; |
2982 | } | |
33a2b854 | 2983 | |
54d01ffb | 2984 | ret = LTTCOMM_OK; |
33a2b854 | 2985 | |
54d01ffb DG |
2986 | error: |
2987 | return ret; | |
2988 | } | |
7d29a247 | 2989 | |
54d01ffb DG |
2990 | /* |
2991 | * Command LTTNG_REGISTER_CONSUMER processed by the client thread. | |
2992 | */ | |
2993 | static int cmd_register_consumer(struct ltt_session *session, int domain, | |
2994 | char *sock_path) | |
2995 | { | |
2996 | int ret, sock; | |
b389abbe | 2997 | |
54d01ffb DG |
2998 | switch (domain) { |
2999 | case LTTNG_DOMAIN_KERNEL: | |
3000 | /* Can't register a consumer if there is already one */ | |
48c4f28c | 3001 | if (session->kernel_session->consumer_fds_sent != 0) { |
54d01ffb DG |
3002 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3003 | goto error; | |
3004 | } | |
3005 | ||
3006 | sock = lttcomm_connect_unix_sock(sock_path); | |
3007 | if (sock < 0) { | |
3008 | ret = LTTCOMM_CONNECT_FAIL; | |
3009 | goto error; | |
3010 | } | |
3011 | ||
3012 | session->kernel_session->consumer_fd = sock; | |
3013 | break; | |
3014 | default: | |
3015 | /* TODO: Userspace tracing */ | |
1ab1ea0b | 3016 | ret = LTTCOMM_UND; |
54d01ffb DG |
3017 | goto error; |
3018 | } | |
3019 | ||
3020 | ret = LTTCOMM_OK; | |
3021 | ||
3022 | error: | |
3023 | return ret; | |
3024 | } | |
3025 | ||
3026 | /* | |
3027 | * Command LTTNG_LIST_DOMAINS processed by the client thread. | |
3028 | */ | |
3029 | static ssize_t cmd_list_domains(struct ltt_session *session, | |
3030 | struct lttng_domain **domains) | |
3031 | { | |
b551a063 | 3032 | int ret, index = 0; |
54d01ffb DG |
3033 | ssize_t nb_dom = 0; |
3034 | ||
3035 | if (session->kernel_session != NULL) { | |
b551a063 | 3036 | DBG3("Listing domains found kernel domain"); |
54d01ffb DG |
3037 | nb_dom++; |
3038 | } | |
3039 | ||
b551a063 DG |
3040 | if (session->ust_session != NULL) { |
3041 | DBG3("Listing domains found UST global domain"); | |
3042 | nb_dom++; | |
3043 | } | |
54d01ffb | 3044 | |
b551a063 | 3045 | *domains = zmalloc(nb_dom * sizeof(struct lttng_domain)); |
54d01ffb DG |
3046 | if (*domains == NULL) { |
3047 | ret = -LTTCOMM_FATAL; | |
3048 | goto error; | |
3049 | } | |
3050 | ||
b551a063 DG |
3051 | if (session->kernel_session != NULL) { |
3052 | (*domains)[index].type = LTTNG_DOMAIN_KERNEL; | |
3053 | index++; | |
3054 | } | |
3055 | ||
3056 | if (session->ust_session != NULL) { | |
3057 | (*domains)[index].type = LTTNG_DOMAIN_UST; | |
3058 | index++; | |
3059 | } | |
54d01ffb | 3060 | |
54d01ffb DG |
3061 | return nb_dom; |
3062 | ||
3063 | error: | |
3064 | return ret; | |
3065 | } | |
3066 | ||
3067 | /* | |
3068 | * Command LTTNG_LIST_CHANNELS processed by the client thread. | |
3069 | */ | |
b551a063 | 3070 | static ssize_t cmd_list_channels(int domain, struct ltt_session *session, |
54d01ffb DG |
3071 | struct lttng_channel **channels) |
3072 | { | |
3073 | int ret; | |
3074 | ssize_t nb_chan = 0; | |
3075 | ||
b551a063 DG |
3076 | switch (domain) { |
3077 | case LTTNG_DOMAIN_KERNEL: | |
3078 | if (session->kernel_session != NULL) { | |
3079 | nb_chan = session->kernel_session->channel_count; | |
3080 | } | |
0df502fd | 3081 | DBG3("Number of kernel channels %zd", nb_chan); |
b551a063 DG |
3082 | break; |
3083 | case LTTNG_DOMAIN_UST: | |
3084 | if (session->ust_session != NULL) { | |
bec39940 | 3085 | nb_chan = lttng_ht_get_count( |
b551a063 DG |
3086 | session->ust_session->domain_global.channels); |
3087 | } | |
0df502fd | 3088 | DBG3("Number of UST global channels %zd", nb_chan); |
b551a063 DG |
3089 | break; |
3090 | default: | |
3091 | *channels = NULL; | |
1ab1ea0b | 3092 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3093 | goto error; |
3094 | } | |
3095 | ||
b551a063 DG |
3096 | if (nb_chan > 0) { |
3097 | *channels = zmalloc(nb_chan * sizeof(struct lttng_channel)); | |
3098 | if (*channels == NULL) { | |
3099 | ret = -LTTCOMM_FATAL; | |
3100 | goto error; | |
3101 | } | |
54d01ffb | 3102 | |
b551a063 DG |
3103 | list_lttng_channels(domain, session, *channels); |
3104 | } else { | |
3105 | *channels = NULL; | |
3106 | } | |
2bdd86d4 | 3107 | |
54d01ffb DG |
3108 | return nb_chan; |
3109 | ||
3110 | error: | |
3111 | return ret; | |
3112 | } | |
3113 | ||
3114 | /* | |
3115 | * Command LTTNG_LIST_EVENTS processed by the client thread. | |
3116 | */ | |
b551a063 | 3117 | static ssize_t cmd_list_events(int domain, struct ltt_session *session, |
54d01ffb DG |
3118 | char *channel_name, struct lttng_event **events) |
3119 | { | |
b551a063 | 3120 | int ret = 0; |
54d01ffb | 3121 | ssize_t nb_event = 0; |
54d01ffb | 3122 | |
b551a063 DG |
3123 | switch (domain) { |
3124 | case LTTNG_DOMAIN_KERNEL: | |
3125 | if (session->kernel_session != NULL) { | |
3126 | nb_event = list_lttng_kernel_events(channel_name, | |
3127 | session->kernel_session, events); | |
54d01ffb | 3128 | } |
b551a063 DG |
3129 | break; |
3130 | case LTTNG_DOMAIN_UST: | |
3131 | { | |
3132 | if (session->ust_session != NULL) { | |
3133 | nb_event = list_lttng_ust_global_events(channel_name, | |
3134 | &session->ust_session->domain_global, events); | |
3135 | } | |
3136 | break; | |
54d01ffb | 3137 | } |
b551a063 | 3138 | default: |
1ab1ea0b | 3139 | ret = -LTTCOMM_UND; |
54d01ffb DG |
3140 | goto error; |
3141 | } | |
3142 | ||
b551a063 | 3143 | ret = nb_event; |
54d01ffb DG |
3144 | |
3145 | error: | |
3146 | return ret; | |
3147 | } | |
3148 | ||
3149 | /* | |
3150 | * Process the command requested by the lttng client within the command | |
3151 | * context structure. This function make sure that the return structure (llm) | |
3152 | * is set and ready for transmission before returning. | |
3153 | * | |
3154 | * Return any error encountered or 0 for success. | |
3155 | */ | |
3156 | static int process_client_msg(struct command_ctx *cmd_ctx) | |
3157 | { | |
3158 | int ret = LTTCOMM_OK; | |
44d3bd01 | 3159 | int need_tracing_session = 1; |
2e09ba09 | 3160 | int need_domain; |
54d01ffb DG |
3161 | |
3162 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
3163 | ||
2e09ba09 MD |
3164 | switch (cmd_ctx->lsm->cmd_type) { |
3165 | case LTTNG_CREATE_SESSION: | |
3166 | case LTTNG_DESTROY_SESSION: | |
3167 | case LTTNG_LIST_SESSIONS: | |
3168 | case LTTNG_LIST_DOMAINS: | |
3169 | case LTTNG_START_TRACE: | |
3170 | case LTTNG_STOP_TRACE: | |
3171 | need_domain = 0; | |
3aace903 | 3172 | break; |
2e09ba09 MD |
3173 | default: |
3174 | need_domain = 1; | |
3175 | } | |
3176 | ||
3177 | if (opt_no_kernel && need_domain | |
3178 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 MD |
3179 | if (!is_root) { |
3180 | ret = LTTCOMM_NEED_ROOT_SESSIOND; | |
3181 | } else { | |
3182 | ret = LTTCOMM_KERN_NA; | |
3183 | } | |
4fba7219 DG |
3184 | goto error; |
3185 | } | |
3186 | ||
54d01ffb DG |
3187 | /* |
3188 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3189 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3190 | * command. |
3191 | */ | |
3192 | switch(cmd_ctx->lsm->cmd_type) { | |
3193 | case LTTNG_LIST_SESSIONS: | |
3194 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3195 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3196 | case LTTNG_LIST_DOMAINS: |
3197 | case LTTNG_LIST_CHANNELS: | |
3198 | case LTTNG_LIST_EVENTS: | |
3199 | break; | |
3200 | default: | |
3201 | /* Setup lttng message with no payload */ | |
3202 | ret = setup_lttng_msg(cmd_ctx, 0); | |
3203 | if (ret < 0) { | |
3204 | /* This label does not try to unlock the session */ | |
3205 | goto init_setup_error; | |
3206 | } | |
3207 | } | |
3208 | ||
3209 | /* Commands that DO NOT need a session. */ | |
3210 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3211 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 3212 | case LTTNG_CALIBRATE: |
54d01ffb DG |
3213 | case LTTNG_LIST_SESSIONS: |
3214 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3215 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 3216 | need_tracing_session = 0; |
54d01ffb DG |
3217 | break; |
3218 | default: | |
3219 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3220 | /* |
3221 | * We keep the session list lock across _all_ commands | |
3222 | * for now, because the per-session lock does not | |
3223 | * handle teardown properly. | |
3224 | */ | |
74babd95 | 3225 | session_lock_list(); |
54d01ffb DG |
3226 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3227 | if (cmd_ctx->session == NULL) { | |
3228 | if (cmd_ctx->lsm->session.name != NULL) { | |
3229 | ret = LTTCOMM_SESS_NOT_FOUND; | |
3230 | } else { | |
3231 | /* If no session name specified */ | |
3232 | ret = LTTCOMM_SELECT_SESS; | |
3233 | } | |
3234 | goto error; | |
3235 | } else { | |
3236 | /* Acquire lock for the session */ | |
3237 | session_lock(cmd_ctx->session); | |
3238 | } | |
3239 | break; | |
3240 | } | |
b389abbe | 3241 | |
2e09ba09 MD |
3242 | if (!need_domain) { |
3243 | goto skip_domain; | |
3244 | } | |
54d01ffb DG |
3245 | /* |
3246 | * Check domain type for specific "pre-action". | |
3247 | */ | |
3248 | switch (cmd_ctx->lsm->domain.type) { | |
3249 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3250 | if (!is_root) { |
531d29f9 | 3251 | ret = LTTCOMM_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3252 | goto error; |
3253 | } | |
3254 | ||
54d01ffb | 3255 | /* Kernel tracer check */ |
a4b35e07 | 3256 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3257 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3258 | ret = init_kernel_tracer(); |
3259 | if (ret != 0) { | |
54d01ffb DG |
3260 | goto error; |
3261 | } | |
3262 | } | |
5eb91c98 | 3263 | |
5c827ce0 DG |
3264 | /* Consumer is in an ERROR state. Report back to client */ |
3265 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
3266 | ret = LTTCOMM_NO_KERNCONSUMERD; | |
3267 | goto error; | |
3268 | } | |
3269 | ||
54d01ffb | 3270 | /* Need a session for kernel command */ |
44d3bd01 | 3271 | if (need_tracing_session) { |
54d01ffb | 3272 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3273 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3274 | if (ret < 0) { |
54d01ffb | 3275 | ret = LTTCOMM_KERN_SESS_FAIL; |
5eb91c98 DG |
3276 | goto error; |
3277 | } | |
b389abbe | 3278 | } |
7d29a247 | 3279 | |
54d01ffb | 3280 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3281 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3282 | if (kconsumer_data.pid == 0 && | |
54d01ffb | 3283 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3284 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3285 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3286 | if (ret < 0) { |
54d01ffb DG |
3287 | ret = LTTCOMM_KERN_CONSUMER_FAIL; |
3288 | goto error; | |
950131af | 3289 | } |
5c827ce0 | 3290 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3291 | } else { |
3292 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3293 | } |
0d0c377a | 3294 | } |
5c827ce0 | 3295 | |
54d01ffb | 3296 | break; |
2bdd86d4 | 3297 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3298 | { |
5c827ce0 DG |
3299 | /* Consumer is in an ERROR state. Report back to client */ |
3300 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
3301 | ret = LTTCOMM_NO_USTCONSUMERD; | |
3302 | goto error; | |
3303 | } | |
3304 | ||
44d3bd01 | 3305 | if (need_tracing_session) { |
f6a9efaa | 3306 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3307 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3308 | &cmd_ctx->lsm->domain); |
44d3bd01 DG |
3309 | if (ret != LTTCOMM_OK) { |
3310 | goto error; | |
3311 | } | |
3312 | } | |
7753dea8 MD |
3313 | /* Start the UST consumer daemons */ |
3314 | /* 64-bit */ | |
3315 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3316 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3317 | ustconsumer64_data.pid == 0 && |
2bdd86d4 | 3318 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3319 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3320 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3321 | if (ret < 0) { |
7753dea8 MD |
3322 | ret = LTTCOMM_UST_CONSUMER64_FAIL; |
3323 | ust_consumerd64_fd = -EINVAL; | |
2bdd86d4 MD |
3324 | goto error; |
3325 | } | |
48842b30 | 3326 | |
7753dea8 | 3327 | ust_consumerd64_fd = ustconsumer64_data.cmd_sock; |
5c827ce0 | 3328 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3329 | } else { |
7753dea8 MD |
3330 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3331 | } | |
3332 | /* 32-bit */ | |
fc7a59ce | 3333 | if (consumerd32_bin[0] != '\0' && |
7753dea8 MD |
3334 | ustconsumer32_data.pid == 0 && |
3335 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { | |
3336 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
3337 | ret = start_consumerd(&ustconsumer32_data); | |
3338 | if (ret < 0) { | |
3339 | ret = LTTCOMM_UST_CONSUMER32_FAIL; | |
3340 | ust_consumerd32_fd = -EINVAL; | |
3341 | goto error; | |
3342 | } | |
5c827ce0 | 3343 | |
7753dea8 | 3344 | ust_consumerd32_fd = ustconsumer32_data.cmd_sock; |
5c827ce0 | 3345 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3346 | } else { |
3347 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3348 | } |
44d3bd01 DG |
3349 | } |
3350 | break; | |
48842b30 | 3351 | } |
54d01ffb | 3352 | default: |
54d01ffb DG |
3353 | break; |
3354 | } | |
2e09ba09 | 3355 | skip_domain: |
33a2b854 | 3356 | |
5c827ce0 DG |
3357 | /* Validate consumer daemon state when start/stop trace command */ |
3358 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3359 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3360 | switch (cmd_ctx->lsm->domain.type) { | |
3361 | case LTTNG_DOMAIN_UST: | |
3362 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
3363 | ret = LTTCOMM_NO_USTCONSUMERD; | |
3364 | goto error; | |
3365 | } | |
3366 | break; | |
3367 | case LTTNG_DOMAIN_KERNEL: | |
3368 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
3369 | ret = LTTCOMM_NO_KERNCONSUMERD; | |
3370 | goto error; | |
3371 | } | |
3372 | break; | |
3373 | } | |
3374 | } | |
3375 | ||
8e0af1b4 MD |
3376 | /* |
3377 | * Check that the UID or GID match that of the tracing session. | |
3378 | * The root user can interact with all sessions. | |
3379 | */ | |
3380 | if (need_tracing_session) { | |
3381 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3382 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3383 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
8e0af1b4 MD |
3384 | ret = LTTCOMM_EPERM; |
3385 | goto error; | |
3386 | } | |
3387 | } | |
3388 | ||
54d01ffb DG |
3389 | /* Process by command type */ |
3390 | switch (cmd_ctx->lsm->cmd_type) { | |
3391 | case LTTNG_ADD_CONTEXT: | |
3392 | { | |
3393 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3394 | cmd_ctx->lsm->u.context.channel_name, | |
3395 | cmd_ctx->lsm->u.context.event_name, | |
3396 | &cmd_ctx->lsm->u.context.ctx); | |
3397 | break; | |
3398 | } | |
3399 | case LTTNG_DISABLE_CHANNEL: | |
3400 | { | |
3401 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3402 | cmd_ctx->lsm->u.disable.channel_name); | |
3403 | break; | |
3404 | } | |
3405 | case LTTNG_DISABLE_EVENT: | |
3406 | { | |
3407 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3408 | cmd_ctx->lsm->u.disable.channel_name, | |
3409 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3410 | break; |
3411 | } | |
54d01ffb DG |
3412 | case LTTNG_DISABLE_ALL_EVENT: |
3413 | { | |
2bdd86d4 | 3414 | DBG("Disabling all events"); |
54d01ffb DG |
3415 | |
3416 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3417 | cmd_ctx->lsm->u.disable.channel_name); | |
3418 | break; | |
3419 | } | |
3420 | case LTTNG_ENABLE_CHANNEL: | |
3421 | { | |
aea829b3 | 3422 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
54d01ffb DG |
3423 | &cmd_ctx->lsm->u.channel.chan); |
3424 | break; | |
3425 | } | |
3426 | case LTTNG_ENABLE_EVENT: | |
3427 | { | |
3428 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3429 | cmd_ctx->lsm->u.enable.channel_name, | |
3430 | &cmd_ctx->lsm->u.enable.event); | |
3431 | break; | |
3432 | } | |
3433 | case LTTNG_ENABLE_ALL_EVENT: | |
3434 | { | |
2bdd86d4 | 3435 | DBG("Enabling all events"); |
54d01ffb DG |
3436 | |
3437 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 DG |
3438 | cmd_ctx->lsm->u.enable.channel_name, |
3439 | cmd_ctx->lsm->u.enable.event.type); | |
54d01ffb DG |
3440 | break; |
3441 | } | |
052da939 | 3442 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3443 | { |
9f19cc17 | 3444 | struct lttng_event *events; |
54d01ffb | 3445 | ssize_t nb_events; |
052da939 | 3446 | |
54d01ffb DG |
3447 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3448 | if (nb_events < 0) { | |
3449 | ret = -nb_events; | |
3450 | goto error; | |
2ef84c95 DG |
3451 | } |
3452 | ||
3453 | /* | |
3454 | * Setup lttng message with payload size set to the event list size in | |
3455 | * bytes and then copy list into the llm payload. | |
3456 | */ | |
052da939 | 3457 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3458 | if (ret < 0) { |
052da939 | 3459 | free(events); |
2ef84c95 DG |
3460 | goto setup_error; |
3461 | } | |
3462 | ||
3463 | /* Copy event list into message payload */ | |
9f19cc17 | 3464 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3465 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3466 | |
9f19cc17 | 3467 | free(events); |
2ef84c95 DG |
3468 | |
3469 | ret = LTTCOMM_OK; | |
3470 | break; | |
3471 | } | |
f37d259d MD |
3472 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3473 | { | |
3474 | struct lttng_event_field *fields; | |
3475 | ssize_t nb_fields; | |
3476 | ||
3477 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, &fields); | |
3478 | if (nb_fields < 0) { | |
3479 | ret = -nb_fields; | |
3480 | goto error; | |
3481 | } | |
3482 | ||
3483 | /* | |
3484 | * Setup lttng message with payload size set to the event list size in | |
3485 | * bytes and then copy list into the llm payload. | |
3486 | */ | |
3487 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event_field) * nb_fields); | |
3488 | if (ret < 0) { | |
3489 | free(fields); | |
3490 | goto setup_error; | |
3491 | } | |
3492 | ||
3493 | /* Copy event list into message payload */ | |
3494 | memcpy(cmd_ctx->llm->payload, fields, | |
3495 | sizeof(struct lttng_event_field) * nb_fields); | |
3496 | ||
3497 | free(fields); | |
3498 | ||
3499 | ret = LTTCOMM_OK; | |
3500 | break; | |
3501 | } | |
3502 | ||
f3ed775e | 3503 | case LTTNG_START_TRACE: |
8c0faa1d | 3504 | { |
54d01ffb | 3505 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3506 | break; |
3507 | } | |
f3ed775e | 3508 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3509 | { |
54d01ffb | 3510 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3511 | break; |
3512 | } | |
5e16da05 MD |
3513 | case LTTNG_CREATE_SESSION: |
3514 | { | |
54d01ffb | 3515 | ret = cmd_create_session(cmd_ctx->lsm->session.name, |
6df2e2c9 | 3516 | cmd_ctx->lsm->session.path, &cmd_ctx->creds); |
5e16da05 MD |
3517 | break; |
3518 | } | |
3519 | case LTTNG_DESTROY_SESSION: | |
3520 | { | |
54d01ffb DG |
3521 | ret = cmd_destroy_session(cmd_ctx->session, |
3522 | cmd_ctx->lsm->session.name); | |
256a5576 MD |
3523 | /* |
3524 | * Set session to NULL so we do not unlock it after | |
3525 | * free. | |
3526 | */ | |
3527 | cmd_ctx->session = NULL; | |
5461b305 | 3528 | break; |
5e16da05 | 3529 | } |
9f19cc17 | 3530 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3531 | { |
54d01ffb DG |
3532 | ssize_t nb_dom; |
3533 | struct lttng_domain *domains; | |
5461b305 | 3534 | |
54d01ffb DG |
3535 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3536 | if (nb_dom < 0) { | |
3537 | ret = -nb_dom; | |
3538 | goto error; | |
ce3d728c | 3539 | } |
520ff687 | 3540 | |
54d01ffb | 3541 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
3542 | if (ret < 0) { |
3543 | goto setup_error; | |
520ff687 | 3544 | } |
57167058 | 3545 | |
54d01ffb DG |
3546 | /* Copy event list into message payload */ |
3547 | memcpy(cmd_ctx->llm->payload, domains, | |
3548 | nb_dom * sizeof(struct lttng_domain)); | |
3549 | ||
3550 | free(domains); | |
5e16da05 | 3551 | |
5461b305 | 3552 | ret = LTTCOMM_OK; |
5e16da05 MD |
3553 | break; |
3554 | } | |
9f19cc17 | 3555 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3556 | { |
6775595e | 3557 | int nb_chan; |
54d01ffb DG |
3558 | struct lttng_channel *channels; |
3559 | ||
b551a063 DG |
3560 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3561 | cmd_ctx->session, &channels); | |
54d01ffb DG |
3562 | if (nb_chan < 0) { |
3563 | ret = -nb_chan; | |
3564 | goto error; | |
5461b305 | 3565 | } |
ca95a216 | 3566 | |
54d01ffb | 3567 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
3568 | if (ret < 0) { |
3569 | goto setup_error; | |
3570 | } | |
9f19cc17 | 3571 | |
54d01ffb DG |
3572 | /* Copy event list into message payload */ |
3573 | memcpy(cmd_ctx->llm->payload, channels, | |
3574 | nb_chan * sizeof(struct lttng_channel)); | |
3575 | ||
3576 | free(channels); | |
9f19cc17 DG |
3577 | |
3578 | ret = LTTCOMM_OK; | |
5461b305 | 3579 | break; |
5e16da05 | 3580 | } |
9f19cc17 | 3581 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3582 | { |
b551a063 | 3583 | ssize_t nb_event; |
684d34d2 | 3584 | struct lttng_event *events = NULL; |
9f19cc17 | 3585 | |
b551a063 | 3586 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3587 | cmd_ctx->lsm->u.list.channel_name, &events); |
3588 | if (nb_event < 0) { | |
3589 | ret = -nb_event; | |
3590 | goto error; | |
5461b305 | 3591 | } |
ca95a216 | 3592 | |
54d01ffb | 3593 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
3594 | if (ret < 0) { |
3595 | goto setup_error; | |
3596 | } | |
9f19cc17 | 3597 | |
54d01ffb DG |
3598 | /* Copy event list into message payload */ |
3599 | memcpy(cmd_ctx->llm->payload, events, | |
3600 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3601 | |
54d01ffb | 3602 | free(events); |
9f19cc17 DG |
3603 | |
3604 | ret = LTTCOMM_OK; | |
5461b305 | 3605 | break; |
5e16da05 MD |
3606 | } |
3607 | case LTTNG_LIST_SESSIONS: | |
3608 | { | |
8e0af1b4 | 3609 | unsigned int nr_sessions; |
5461b305 | 3610 | |
8e0af1b4 | 3611 | session_lock_list(); |
730389d9 DG |
3612 | nr_sessions = lttng_sessions_count( |
3613 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3614 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3615 | |
8e0af1b4 | 3616 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3617 | if (ret < 0) { |
54d01ffb | 3618 | session_unlock_list(); |
5461b305 | 3619 | goto setup_error; |
e065084a | 3620 | } |
5e16da05 | 3621 | |
6c9cc2ab | 3622 | /* Filled the session array */ |
8e0af1b4 | 3623 | list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3624 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3625 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3626 | |
54d01ffb | 3627 | session_unlock_list(); |
5e16da05 | 3628 | |
5461b305 | 3629 | ret = LTTCOMM_OK; |
5e16da05 MD |
3630 | break; |
3631 | } | |
d0254c7c MD |
3632 | case LTTNG_CALIBRATE: |
3633 | { | |
54d01ffb DG |
3634 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3635 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3636 | break; |
3637 | } | |
d9800920 DG |
3638 | case LTTNG_REGISTER_CONSUMER: |
3639 | { | |
54d01ffb DG |
3640 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3641 | cmd_ctx->lsm->u.reg.path); | |
d9800920 DG |
3642 | break; |
3643 | } | |
5e16da05 | 3644 | default: |
5e16da05 | 3645 | ret = LTTCOMM_UND; |
5461b305 | 3646 | break; |
fac6795d DG |
3647 | } |
3648 | ||
5461b305 | 3649 | error: |
5461b305 DG |
3650 | if (cmd_ctx->llm == NULL) { |
3651 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3652 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3653 | goto setup_error; |
3654 | } | |
3655 | } | |
54d01ffb | 3656 | /* Set return code */ |
5461b305 | 3657 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3658 | setup_error: |
b5541356 | 3659 | if (cmd_ctx->session) { |
54d01ffb | 3660 | session_unlock(cmd_ctx->session); |
b5541356 | 3661 | } |
256a5576 MD |
3662 | if (need_tracing_session) { |
3663 | session_unlock_list(); | |
3664 | } | |
54d01ffb | 3665 | init_setup_error: |
8028d920 | 3666 | return ret; |
fac6795d DG |
3667 | } |
3668 | ||
1d4b027a | 3669 | /* |
d063d709 DG |
3670 | * This thread manage all clients request using the unix client socket for |
3671 | * communication. | |
1d4b027a DG |
3672 | */ |
3673 | static void *thread_manage_clients(void *data) | |
3674 | { | |
a4b35e07 | 3675 | int sock = -1, ret, i, pollfd; |
5eb91c98 | 3676 | uint32_t revents, nb_fd; |
273ea72c | 3677 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3678 | struct lttng_poll_event events; |
1d4b027a DG |
3679 | |
3680 | DBG("[thread] Manage client started"); | |
3681 | ||
f6a9efaa DG |
3682 | rcu_register_thread(); |
3683 | ||
1d4b027a DG |
3684 | ret = lttcomm_listen_unix_sock(client_sock); |
3685 | if (ret < 0) { | |
3686 | goto error; | |
3687 | } | |
3688 | ||
5eb91c98 DG |
3689 | /* |
3690 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3691 | * more will be added to this poll set. | |
3692 | */ | |
3693 | ret = create_thread_poll_set(&events, 2); | |
3694 | if (ret < 0) { | |
3695 | goto error; | |
3696 | } | |
273ea72c | 3697 | |
5eb91c98 DG |
3698 | /* Add the application registration socket */ |
3699 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3700 | if (ret < 0) { | |
3701 | goto error; | |
3702 | } | |
273ea72c | 3703 | |
bbd973c2 DG |
3704 | /* |
3705 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3706 | */ |
3707 | if (opt_sig_parent) { | |
8db8d1dc | 3708 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3709 | } |
3710 | ||
3711 | while (1) { | |
1d4b027a | 3712 | DBG("Accepting client command ..."); |
273ea72c | 3713 | |
5eb91c98 DG |
3714 | nb_fd = LTTNG_POLL_GETNB(&events); |
3715 | ||
273ea72c | 3716 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 3717 | restart: |
5eb91c98 | 3718 | ret = lttng_poll_wait(&events, -1); |
273ea72c | 3719 | if (ret < 0) { |
88f2b785 MD |
3720 | /* |
3721 | * Restart interrupted system call. | |
3722 | */ | |
3723 | if (errno == EINTR) { | |
3724 | goto restart; | |
3725 | } | |
273ea72c DG |
3726 | goto error; |
3727 | } | |
3728 | ||
5eb91c98 DG |
3729 | for (i = 0; i < nb_fd; i++) { |
3730 | /* Fetch once the poll data */ | |
3731 | revents = LTTNG_POLL_GETEV(&events, i); | |
3732 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3733 | ||
3734 | /* Thread quit pipe has been closed. Killing thread. */ | |
3735 | ret = check_thread_quit_pipe(pollfd, revents); | |
3736 | if (ret) { | |
3737 | goto error; | |
3738 | } | |
3739 | ||
3740 | /* Event on the registration socket */ | |
3741 | if (pollfd == client_sock) { | |
3742 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3743 | ERR("Client socket poll error"); | |
3744 | goto error; | |
3745 | } | |
3746 | } | |
3747 | } | |
3748 | ||
3749 | DBG("Wait for client response"); | |
3750 | ||
3751 | sock = lttcomm_accept_unix_sock(client_sock); | |
3752 | if (sock < 0) { | |
273ea72c | 3753 | goto error; |
273ea72c DG |
3754 | } |
3755 | ||
be040666 DG |
3756 | /* Set socket option for credentials retrieval */ |
3757 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3758 | if (ret < 0) { | |
3759 | goto error; | |
3760 | } | |
3761 | ||
5eb91c98 | 3762 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3763 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3764 | if (cmd_ctx == NULL) { |
76d7553f | 3765 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3766 | goto error; |
5eb91c98 | 3767 | } |
1d4b027a | 3768 | |
5eb91c98 | 3769 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3770 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3771 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3772 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3773 | goto error; |
3774 | } | |
1d4b027a | 3775 | |
5eb91c98 DG |
3776 | cmd_ctx->llm = NULL; |
3777 | cmd_ctx->session = NULL; | |
1d4b027a | 3778 | |
5eb91c98 DG |
3779 | /* |
3780 | * Data is received from the lttng client. The struct | |
3781 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3782 | * the client. | |
3783 | */ | |
3784 | DBG("Receiving data from client ..."); | |
be040666 DG |
3785 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3786 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3787 | if (ret <= 0) { |
3788 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3789 | ret = close(sock); |
3790 | if (ret) { | |
3791 | PERROR("close"); | |
3792 | } | |
3793 | sock = -1; | |
a2c0da86 | 3794 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3795 | continue; |
3796 | } | |
1d4b027a | 3797 | |
5eb91c98 DG |
3798 | // TODO: Validate cmd_ctx including sanity check for |
3799 | // security purpose. | |
f7776ea7 | 3800 | |
f6a9efaa | 3801 | rcu_thread_online(); |
5eb91c98 DG |
3802 | /* |
3803 | * This function dispatch the work to the kernel or userspace tracer | |
3804 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3805 | * informations for the client. The command context struct contains | |
3806 | * everything this function may needs. | |
3807 | */ | |
3808 | ret = process_client_msg(cmd_ctx); | |
f6a9efaa | 3809 | rcu_thread_offline(); |
5eb91c98 | 3810 | if (ret < 0) { |
bbd973c2 | 3811 | /* |
5eb91c98 | 3812 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3813 | * this point, ret < 0 means that a zmalloc failed |
5eb91c98 | 3814 | * (ENOMEM). Error detected but still accept command. |
bbd973c2 | 3815 | */ |
bbd973c2 | 3816 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3817 | continue; |
3818 | } | |
d6e4fca4 | 3819 | |
54d01ffb DG |
3820 | DBG("Sending response (size: %d, retcode: %s)", |
3821 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3822 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3823 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3824 | if (ret < 0) { |
3825 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3826 | } |
1d4b027a | 3827 | |
5eb91c98 | 3828 | /* End of transmission */ |
76d7553f MD |
3829 | ret = close(sock); |
3830 | if (ret) { | |
3831 | PERROR("close"); | |
3832 | } | |
3833 | sock = -1; | |
be040666 DG |
3834 | |
3835 | clean_command_ctx(&cmd_ctx); | |
273ea72c DG |
3836 | } |
3837 | ||
5eb91c98 DG |
3838 | error: |
3839 | DBG("Client thread dying"); | |
273ea72c | 3840 | unlink(client_unix_sock_path); |
76d7553f MD |
3841 | if (client_sock >= 0) { |
3842 | ret = close(client_sock); | |
3843 | if (ret) { | |
3844 | PERROR("close"); | |
3845 | } | |
a4b35e07 MD |
3846 | } |
3847 | if (sock >= 0) { | |
76d7553f MD |
3848 | ret = close(sock); |
3849 | if (ret) { | |
3850 | PERROR("close"); | |
3851 | } | |
a4b35e07 | 3852 | } |
273ea72c | 3853 | |
5eb91c98 | 3854 | lttng_poll_clean(&events); |
a2fb29a5 | 3855 | clean_command_ctx(&cmd_ctx); |
f6a9efaa DG |
3856 | |
3857 | rcu_unregister_thread(); | |
1d4b027a DG |
3858 | return NULL; |
3859 | } | |
3860 | ||
3861 | ||
fac6795d DG |
3862 | /* |
3863 | * usage function on stderr | |
3864 | */ | |
3865 | static void usage(void) | |
3866 | { | |
b716ce68 | 3867 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3868 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3869 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3870 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3871 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3872 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3873 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3874 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3875 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3876 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3877 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3878 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3879 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3880 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3881 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3882 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3883 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3884 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3885 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3886 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3887 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3888 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3889 | } |
3890 | ||
3891 | /* | |
3892 | * daemon argument parsing | |
3893 | */ | |
3894 | static int parse_args(int argc, char **argv) | |
3895 | { | |
3896 | int c; | |
3897 | ||
3898 | static struct option long_options[] = { | |
3899 | { "client-sock", 1, 0, 'c' }, | |
3900 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3901 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3902 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3903 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3904 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3905 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3906 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3907 | { "consumerd32-path", 1, 0, 'u' }, | |
3908 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3909 | { "consumerd64-path", 1, 0, 't' }, | |
3910 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3911 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3912 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3913 | { "help", 0, 0, 'h' }, |
3914 | { "group", 1, 0, 'g' }, | |
3915 | { "version", 0, 0, 'V' }, | |
75462a81 | 3916 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3917 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3918 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3919 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3920 | { NULL, 0, 0, 0 } |
3921 | }; | |
3922 | ||
3923 | while (1) { | |
3924 | int option_index = 0; | |
4fba7219 | 3925 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3926 | long_options, &option_index); |
fac6795d DG |
3927 | if (c == -1) { |
3928 | break; | |
3929 | } | |
3930 | ||
3931 | switch (c) { | |
3932 | case 0: | |
3933 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3934 | if (optarg) { | |
3935 | fprintf(stderr, " with arg %s\n", optarg); | |
3936 | } | |
3937 | break; | |
b716ce68 | 3938 | case 'c': |
fac6795d DG |
3939 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3940 | break; | |
3941 | case 'a': | |
3942 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3943 | break; | |
3944 | case 'd': | |
3945 | opt_daemon = 1; | |
3946 | break; | |
3947 | case 'g': | |
fb09408a | 3948 | opt_tracing_group = optarg; |
fac6795d DG |
3949 | break; |
3950 | case 'h': | |
3951 | usage(); | |
3952 | exit(EXIT_FAILURE); | |
3953 | case 'V': | |
3954 | fprintf(stdout, "%s\n", VERSION); | |
3955 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3956 | case 'S': |
3957 | opt_sig_parent = 1; | |
3958 | break; | |
d6f42150 | 3959 | case 'E': |
3bd1e081 | 3960 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3961 | break; |
3962 | case 'C': | |
3bd1e081 MD |
3963 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3964 | break; | |
3965 | case 'F': | |
7753dea8 | 3966 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3967 | break; |
3968 | case 'D': | |
7753dea8 MD |
3969 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3970 | break; | |
3971 | case 'H': | |
3972 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3973 | break; | |
3974 | case 'G': | |
3975 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3976 | break; |
4fba7219 DG |
3977 | case 'N': |
3978 | opt_no_kernel = 1; | |
3979 | break; | |
75462a81 | 3980 | case 'q': |
97e19046 | 3981 | lttng_opt_quiet = 1; |
75462a81 | 3982 | break; |
3f9947db | 3983 | case 'v': |
53086306 | 3984 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3985 | lttng_opt_verbose += 1; |
3f9947db | 3986 | break; |
31f73cc9 | 3987 | case 'Z': |
3bd1e081 | 3988 | opt_verbose_consumer += 1; |
31f73cc9 | 3989 | break; |
fb09408a | 3990 | case 'u': |
fc7a59ce | 3991 | consumerd32_bin= optarg; |
ebaeda94 MD |
3992 | break; |
3993 | case 'U': | |
3994 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3995 | break; |
3996 | case 't': | |
fc7a59ce | 3997 | consumerd64_bin = optarg; |
ebaeda94 MD |
3998 | break; |
3999 | case 'T': | |
4000 | consumerd64_libdir = optarg; | |
fb09408a | 4001 | break; |
fac6795d DG |
4002 | default: |
4003 | /* Unknown option or other error. | |
4004 | * Error is printed by getopt, just return */ | |
4005 | return -1; | |
4006 | } | |
4007 | } | |
4008 | ||
4009 | return 0; | |
4010 | } | |
4011 | ||
4012 | /* | |
d063d709 | 4013 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4014 | * apps_sock - The communication socket for all UST apps. |
4015 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4016 | */ |
cf3af59e | 4017 | static int init_daemon_socket(void) |
fac6795d DG |
4018 | { |
4019 | int ret = 0; | |
4020 | mode_t old_umask; | |
4021 | ||
4022 | old_umask = umask(0); | |
4023 | ||
4024 | /* Create client tool unix socket */ | |
d6f42150 DG |
4025 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4026 | if (client_sock < 0) { | |
4027 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4028 | ret = -1; |
4029 | goto end; | |
4030 | } | |
4031 | ||
4032 | /* File permission MUST be 660 */ | |
4033 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4034 | if (ret < 0) { | |
d6f42150 | 4035 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4036 | PERROR("chmod"); |
fac6795d DG |
4037 | goto end; |
4038 | } | |
4039 | ||
4040 | /* Create the application unix socket */ | |
d6f42150 DG |
4041 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4042 | if (apps_sock < 0) { | |
4043 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4044 | ret = -1; |
4045 | goto end; | |
4046 | } | |
4047 | ||
d6f42150 | 4048 | /* File permission MUST be 666 */ |
54d01ffb DG |
4049 | ret = chmod(apps_unix_sock_path, |
4050 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4051 | if (ret < 0) { |
d6f42150 | 4052 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4053 | PERROR("chmod"); |
fac6795d DG |
4054 | goto end; |
4055 | } | |
4056 | ||
4057 | end: | |
4058 | umask(old_umask); | |
4059 | return ret; | |
4060 | } | |
4061 | ||
4062 | /* | |
54d01ffb DG |
4063 | * Check if the global socket is available, and if a daemon is answering at the |
4064 | * other side. If yes, error is returned. | |
fac6795d | 4065 | */ |
cf3af59e | 4066 | static int check_existing_daemon(void) |
fac6795d | 4067 | { |
7d8234d9 | 4068 | /* Is there anybody out there ? */ |
099e26bd | 4069 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4070 | return -EEXIST; |
099e26bd | 4071 | } |
b09c7c76 DG |
4072 | |
4073 | return 0; | |
fac6795d DG |
4074 | } |
4075 | ||
fac6795d | 4076 | /* |
d063d709 | 4077 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4078 | * |
d063d709 | 4079 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4080 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4081 | */ |
be040666 | 4082 | static int set_permissions(char *rundir) |
fac6795d DG |
4083 | { |
4084 | int ret; | |
996b65c8 | 4085 | gid_t gid; |
fac6795d | 4086 | |
6775595e DG |
4087 | ret = allowed_group(); |
4088 | if (ret < 0) { | |
be040666 DG |
4089 | WARN("No tracing group detected"); |
4090 | ret = 0; | |
fac6795d DG |
4091 | goto end; |
4092 | } | |
4093 | ||
6775595e DG |
4094 | gid = ret; |
4095 | ||
d6f42150 | 4096 | /* Set lttng run dir */ |
be040666 | 4097 | ret = chown(rundir, 0, gid); |
d6f42150 | 4098 | if (ret < 0) { |
be040666 | 4099 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4100 | PERROR("chown"); |
d6f42150 DG |
4101 | } |
4102 | ||
d1613cf5 | 4103 | /* Ensure tracing group can search the run dir */ |
61076f74 | 4104 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
4105 | if (ret < 0) { |
4106 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4107 | PERROR("chmod"); |
d1613cf5 JN |
4108 | } |
4109 | ||
d6f42150 | 4110 | /* lttng client socket path */ |
996b65c8 | 4111 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4112 | if (ret < 0) { |
d6f42150 | 4113 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4114 | PERROR("chown"); |
d6f42150 DG |
4115 | } |
4116 | ||
3bd1e081 MD |
4117 | /* kconsumer error socket path */ |
4118 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4119 | if (ret < 0) { |
3bd1e081 | 4120 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4121 | PERROR("chown"); |
3bd1e081 MD |
4122 | } |
4123 | ||
7753dea8 MD |
4124 | /* 64-bit ustconsumer error socket path */ |
4125 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4126 | if (ret < 0) { | |
4127 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4128 | PERROR("chown"); |
7753dea8 MD |
4129 | } |
4130 | ||
4131 | /* 32-bit ustconsumer compat32 error socket path */ | |
4132 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4133 | if (ret < 0) { |
7753dea8 | 4134 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4135 | PERROR("chown"); |
fac6795d DG |
4136 | } |
4137 | ||
d6f42150 | 4138 | DBG("All permissions are set"); |
e07ae692 | 4139 | |
fac6795d DG |
4140 | end: |
4141 | return ret; | |
4142 | } | |
4143 | ||
d6f42150 | 4144 | /* |
d063d709 | 4145 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4146 | */ |
67e40797 | 4147 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4148 | { |
4149 | int ret; | |
4150 | ||
67e40797 DG |
4151 | DBG3("Creating LTTng run directory: %s", rundir); |
4152 | ||
d1613cf5 | 4153 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4154 | if (ret < 0) { |
b1f11e69 | 4155 | if (errno != EEXIST) { |
67e40797 | 4156 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4157 | goto error; |
4158 | } else { | |
4159 | ret = 0; | |
4160 | } | |
d6f42150 DG |
4161 | } |
4162 | ||
4163 | error: | |
4164 | return ret; | |
4165 | } | |
4166 | ||
4167 | /* | |
d063d709 DG |
4168 | * Setup sockets and directory needed by the kconsumerd communication with the |
4169 | * session daemon. | |
d6f42150 | 4170 | */ |
67e40797 DG |
4171 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4172 | const char *rundir) | |
d6f42150 DG |
4173 | { |
4174 | int ret; | |
67e40797 | 4175 | char path[PATH_MAX]; |
d6f42150 | 4176 | |
67e40797 | 4177 | switch (consumer_data->type) { |
7753dea8 | 4178 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4179 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4180 | break; |
4181 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4182 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4183 | break; |
4184 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4185 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4186 | break; |
4187 | default: | |
4188 | ERR("Consumer type unknown"); | |
4189 | ret = -EINVAL; | |
4190 | goto error; | |
d6f42150 DG |
4191 | } |
4192 | ||
67e40797 DG |
4193 | DBG2("Creating consumer directory: %s", path); |
4194 | ||
d1613cf5 | 4195 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4196 | if (ret < 0) { |
6beb2242 | 4197 | if (errno != EEXIST) { |
f11e84c2 | 4198 | PERROR("mkdir"); |
3bd1e081 | 4199 | ERR("Failed to create %s", path); |
6beb2242 DG |
4200 | goto error; |
4201 | } | |
f11e84c2 | 4202 | ret = -1; |
d6f42150 DG |
4203 | } |
4204 | ||
4205 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4206 | consumer_data->err_sock = |
4207 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4208 | if (consumer_data->err_sock < 0) { | |
4209 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4210 | ret = -1; |
4211 | goto error; | |
4212 | } | |
4213 | ||
4214 | /* File permission MUST be 660 */ | |
3bd1e081 | 4215 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4216 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4217 | if (ret < 0) { |
3bd1e081 | 4218 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4219 | PERROR("chmod"); |
d6f42150 DG |
4220 | goto error; |
4221 | } | |
4222 | ||
4223 | error: | |
4224 | return ret; | |
4225 | } | |
4226 | ||
fac6795d | 4227 | /* |
d063d709 | 4228 | * Signal handler for the daemon |
cf3af59e | 4229 | * |
54d01ffb DG |
4230 | * Simply stop all worker threads, leaving main() return gracefully after |
4231 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4232 | */ |
4233 | static void sighandler(int sig) | |
4234 | { | |
4235 | switch (sig) { | |
cf3af59e | 4236 | case SIGPIPE: |
af87c45a | 4237 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4238 | return; |
4239 | case SIGINT: | |
af87c45a | 4240 | DBG("SIGINT caught"); |
cf3af59e MD |
4241 | stop_threads(); |
4242 | break; | |
4243 | case SIGTERM: | |
af87c45a | 4244 | DBG("SIGTERM caught"); |
cf3af59e MD |
4245 | stop_threads(); |
4246 | break; | |
4247 | default: | |
4248 | break; | |
fac6795d | 4249 | } |
fac6795d DG |
4250 | } |
4251 | ||
4252 | /* | |
d063d709 | 4253 | * Setup signal handler for : |
1d4b027a | 4254 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4255 | */ |
1d4b027a | 4256 | static int set_signal_handler(void) |
fac6795d | 4257 | { |
1d4b027a DG |
4258 | int ret = 0; |
4259 | struct sigaction sa; | |
4260 | sigset_t sigset; | |
fac6795d | 4261 | |
1d4b027a | 4262 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4263 | PERROR("sigemptyset"); |
1d4b027a DG |
4264 | return ret; |
4265 | } | |
d6f42150 | 4266 | |
1d4b027a DG |
4267 | sa.sa_handler = sighandler; |
4268 | sa.sa_mask = sigset; | |
4269 | sa.sa_flags = 0; | |
4270 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4271 | PERROR("sigaction"); |
1d4b027a | 4272 | return ret; |
d6f42150 DG |
4273 | } |
4274 | ||
1d4b027a | 4275 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4276 | PERROR("sigaction"); |
1d4b027a | 4277 | return ret; |
d6f42150 | 4278 | } |
aaf26714 | 4279 | |
1d4b027a | 4280 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4281 | PERROR("sigaction"); |
1d4b027a | 4282 | return ret; |
8c0faa1d DG |
4283 | } |
4284 | ||
1d4b027a DG |
4285 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4286 | ||
4287 | return ret; | |
fac6795d DG |
4288 | } |
4289 | ||
f3ed775e | 4290 | /* |
d063d709 DG |
4291 | * Set open files limit to unlimited. This daemon can open a large number of |
4292 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4293 | */ |
4294 | static void set_ulimit(void) | |
4295 | { | |
4296 | int ret; | |
4297 | struct rlimit lim; | |
4298 | ||
a88df331 | 4299 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4300 | lim.rlim_cur = 65535; |
4301 | lim.rlim_max = 65535; | |
4302 | ||
4303 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4304 | if (ret < 0) { | |
76d7553f | 4305 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4306 | } |
4307 | } | |
4308 | ||
fac6795d DG |
4309 | /* |
4310 | * main | |
4311 | */ | |
4312 | int main(int argc, char **argv) | |
4313 | { | |
fac6795d DG |
4314 | int ret = 0; |
4315 | void *status; | |
b082db07 | 4316 | const char *home_path; |
fac6795d | 4317 | |
335a95b7 MD |
4318 | init_kernel_workarounds(); |
4319 | ||
f6a9efaa DG |
4320 | rcu_register_thread(); |
4321 | ||
7753dea8 | 4322 | setup_consumerd_path(); |
fb09408a | 4323 | |
fac6795d DG |
4324 | /* Parse arguments */ |
4325 | progname = argv[0]; | |
4326 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 4327 | goto error; |
fac6795d DG |
4328 | } |
4329 | ||
4330 | /* Daemonize */ | |
4331 | if (opt_daemon) { | |
ceed52b5 MD |
4332 | int i; |
4333 | ||
4334 | /* | |
4335 | * fork | |
4336 | * child: setsid, close FD 0, 1, 2, chdir / | |
4337 | * parent: exit (if fork is successful) | |
4338 | */ | |
53094c05 DG |
4339 | ret = daemon(0, 0); |
4340 | if (ret < 0) { | |
76d7553f | 4341 | PERROR("daemon"); |
cf3af59e | 4342 | goto error; |
53094c05 | 4343 | } |
ceed52b5 MD |
4344 | /* |
4345 | * We are in the child. Make sure all other file | |
4346 | * descriptors are closed, in case we are called with | |
4347 | * more opened file descriptors than the standard ones. | |
4348 | */ | |
4349 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4350 | (void) close(i); | |
4351 | } | |
4352 | } | |
4353 | ||
4354 | /* Create thread quit pipe */ | |
4355 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4356 | goto error; | |
fac6795d DG |
4357 | } |
4358 | ||
4359 | /* Check if daemon is UID = 0 */ | |
4360 | is_root = !getuid(); | |
4361 | ||
fac6795d | 4362 | if (is_root) { |
990570ed | 4363 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4364 | |
4365 | /* Create global run dir with root access */ | |
4366 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4367 | if (ret < 0) { |
cf3af59e | 4368 | goto error; |
d6f42150 DG |
4369 | } |
4370 | ||
fac6795d | 4371 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4372 | snprintf(apps_unix_sock_path, PATH_MAX, |
4373 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4374 | } |
4375 | ||
4376 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4377 | snprintf(client_unix_sock_path, PATH_MAX, |
4378 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4379 | } | |
0fdd1e2c DG |
4380 | |
4381 | /* Set global SHM for ust */ | |
4382 | if (strlen(wait_shm_path) == 0) { | |
4383 | snprintf(wait_shm_path, PATH_MAX, | |
4384 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4385 | } | |
67e40797 DG |
4386 | |
4387 | /* Setup kernel consumerd path */ | |
4388 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4389 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4390 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4391 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4392 | |
4393 | DBG2("Kernel consumer err path: %s", | |
4394 | kconsumer_data.err_unix_sock_path); | |
4395 | DBG2("Kernel consumer cmd path: %s", | |
4396 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4397 | } else { |
b082db07 DG |
4398 | home_path = get_home_dir(); |
4399 | if (home_path == NULL) { | |
273ea72c DG |
4400 | /* TODO: Add --socket PATH option */ |
4401 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4402 | ret = -EPERM; |
4403 | goto error; | |
b082db07 DG |
4404 | } |
4405 | ||
67e40797 DG |
4406 | /* |
4407 | * Create rundir from home path. This will create something like | |
4408 | * $HOME/.lttng | |
4409 | */ | |
990570ed | 4410 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4411 | if (ret < 0) { |
4412 | ret = -ENOMEM; | |
4413 | goto error; | |
4414 | } | |
4415 | ||
4416 | ret = create_lttng_rundir(rundir); | |
4417 | if (ret < 0) { | |
4418 | goto error; | |
4419 | } | |
4420 | ||
fac6795d | 4421 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4422 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4423 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4424 | } |
4425 | ||
4426 | /* Set the cli tool unix socket path */ | |
4427 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4428 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4429 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4430 | } |
0fdd1e2c DG |
4431 | |
4432 | /* Set global SHM for ust */ | |
4433 | if (strlen(wait_shm_path) == 0) { | |
4434 | snprintf(wait_shm_path, PATH_MAX, | |
4435 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
4436 | } | |
fac6795d DG |
4437 | } |
4438 | ||
5c827ce0 DG |
4439 | /* Set consumer initial state */ |
4440 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4441 | ust_consumerd_state = CONSUMER_STOPPED; | |
4442 | ||
847177cd DG |
4443 | DBG("Client socket path %s", client_unix_sock_path); |
4444 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4445 | DBG("LTTng run directory path: %s", rundir); |
4446 | ||
4447 | /* 32 bits consumerd path setup */ | |
4448 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4449 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4450 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4451 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4452 | |
4453 | DBG2("UST consumer 32 bits err path: %s", | |
4454 | ustconsumer32_data.err_unix_sock_path); | |
4455 | DBG2("UST consumer 32 bits cmd path: %s", | |
4456 | ustconsumer32_data.cmd_unix_sock_path); | |
4457 | ||
4458 | /* 64 bits consumerd path setup */ | |
4459 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4460 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4461 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4462 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4463 | |
4464 | DBG2("UST consumer 64 bits err path: %s", | |
4465 | ustconsumer64_data.err_unix_sock_path); | |
4466 | DBG2("UST consumer 64 bits cmd path: %s", | |
4467 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4468 | |
273ea72c | 4469 | /* |
7d8234d9 | 4470 | * See if daemon already exist. |
fac6795d | 4471 | */ |
7d8234d9 | 4472 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4473 | ERR("Already running daemon.\n"); |
273ea72c | 4474 | /* |
cf3af59e MD |
4475 | * We do not goto exit because we must not cleanup() |
4476 | * because a daemon is already running. | |
ab118b20 | 4477 | */ |
cf3af59e | 4478 | goto error; |
a88df331 DG |
4479 | } |
4480 | ||
1427f9b2 DG |
4481 | /* |
4482 | * Init UST app hash table. Alloc hash table before this point since | |
4483 | * cleanup() can get called after that point. | |
4484 | */ | |
4485 | ust_app_ht_alloc(); | |
4486 | ||
54d01ffb | 4487 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4488 | |
4489 | /* | |
4490 | * These actions must be executed as root. We do that *after* setting up | |
4491 | * the sockets path because we MUST make the check for another daemon using | |
4492 | * those paths *before* trying to set the kernel consumer sockets and init | |
4493 | * kernel tracer. | |
4494 | */ | |
4495 | if (is_root) { | |
67e40797 | 4496 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4497 | if (ret < 0) { |
4498 | goto exit; | |
4499 | } | |
4500 | ||
a88df331 | 4501 | /* Setup kernel tracer */ |
4fba7219 DG |
4502 | if (!opt_no_kernel) { |
4503 | init_kernel_tracer(); | |
4504 | } | |
a88df331 DG |
4505 | |
4506 | /* Set ulimit for open files */ | |
4507 | set_ulimit(); | |
fac6795d | 4508 | } |
4063050c MD |
4509 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4510 | lttng_fd_init(); | |
fac6795d | 4511 | |
67e40797 DG |
4512 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4513 | if (ret < 0) { | |
4514 | goto exit; | |
4515 | } | |
4516 | ||
4517 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4518 | if (ret < 0) { | |
4519 | goto exit; | |
4520 | } | |
4521 | ||
cf3af59e MD |
4522 | if ((ret = set_signal_handler()) < 0) { |
4523 | goto exit; | |
fac6795d DG |
4524 | } |
4525 | ||
d6f42150 | 4526 | /* Setup the needed unix socket */ |
cf3af59e MD |
4527 | if ((ret = init_daemon_socket()) < 0) { |
4528 | goto exit; | |
fac6795d DG |
4529 | } |
4530 | ||
4531 | /* Set credentials to socket */ | |
be040666 | 4532 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4533 | goto exit; |
fac6795d DG |
4534 | } |
4535 | ||
5b8719f5 DG |
4536 | /* Get parent pid if -S, --sig-parent is specified. */ |
4537 | if (opt_sig_parent) { | |
4538 | ppid = getppid(); | |
4539 | } | |
4540 | ||
7a485870 | 4541 | /* Setup the kernel pipe for waking up the kernel thread */ |
ef599319 | 4542 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { |
cf3af59e | 4543 | goto exit; |
7a485870 DG |
4544 | } |
4545 | ||
099e26bd | 4546 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4547 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4548 | goto exit; |
4549 | } | |
4550 | ||
4551 | /* Init UST command queue. */ | |
4552 | cds_wfq_init(&ust_cmd_queue.queue); | |
4553 | ||
273ea72c | 4554 | /* |
54d01ffb DG |
4555 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4556 | * statically declared in session.c | |
273ea72c | 4557 | */ |
54d01ffb | 4558 | session_list_ptr = session_get_list(); |
b5541356 | 4559 | |
5eb91c98 DG |
4560 | /* Set up max poll set size */ |
4561 | lttng_poll_set_max_size(); | |
4562 | ||
cf3af59e | 4563 | /* Create thread to manage the client socket */ |
099e26bd DG |
4564 | ret = pthread_create(&client_thread, NULL, |
4565 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4566 | if (ret != 0) { |
76d7553f | 4567 | PERROR("pthread_create clients"); |
cf3af59e MD |
4568 | goto exit_client; |
4569 | } | |
fac6795d | 4570 | |
099e26bd DG |
4571 | /* Create thread to dispatch registration */ |
4572 | ret = pthread_create(&dispatch_thread, NULL, | |
4573 | thread_dispatch_ust_registration, (void *) NULL); | |
4574 | if (ret != 0) { | |
76d7553f | 4575 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4576 | goto exit_dispatch; |
4577 | } | |
4578 | ||
4579 | /* Create thread to manage application registration. */ | |
4580 | ret = pthread_create(®_apps_thread, NULL, | |
4581 | thread_registration_apps, (void *) NULL); | |
4582 | if (ret != 0) { | |
76d7553f | 4583 | PERROR("pthread_create registration"); |
099e26bd DG |
4584 | goto exit_reg_apps; |
4585 | } | |
4586 | ||
cf3af59e | 4587 | /* Create thread to manage application socket */ |
54d01ffb DG |
4588 | ret = pthread_create(&apps_thread, NULL, |
4589 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4590 | if (ret != 0) { |
76d7553f | 4591 | PERROR("pthread_create apps"); |
cf3af59e MD |
4592 | goto exit_apps; |
4593 | } | |
fac6795d | 4594 | |
cf3af59e | 4595 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4596 | ret = pthread_create(&kernel_thread, NULL, |
4597 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4598 | if (ret != 0) { |
76d7553f | 4599 | PERROR("pthread_create kernel"); |
cf3af59e MD |
4600 | goto exit_kernel; |
4601 | } | |
7a485870 | 4602 | |
cf3af59e MD |
4603 | ret = pthread_join(kernel_thread, &status); |
4604 | if (ret != 0) { | |
76d7553f | 4605 | PERROR("pthread_join"); |
cf3af59e | 4606 | goto error; /* join error, exit without cleanup */ |
fac6795d DG |
4607 | } |
4608 | ||
cf3af59e MD |
4609 | exit_kernel: |
4610 | ret = pthread_join(apps_thread, &status); | |
4611 | if (ret != 0) { | |
76d7553f | 4612 | PERROR("pthread_join"); |
cf3af59e MD |
4613 | goto error; /* join error, exit without cleanup */ |
4614 | } | |
fac6795d | 4615 | |
cf3af59e | 4616 | exit_apps: |
099e26bd DG |
4617 | ret = pthread_join(reg_apps_thread, &status); |
4618 | if (ret != 0) { | |
76d7553f | 4619 | PERROR("pthread_join"); |
099e26bd DG |
4620 | goto error; /* join error, exit without cleanup */ |
4621 | } | |
4622 | ||
4623 | exit_reg_apps: | |
4624 | ret = pthread_join(dispatch_thread, &status); | |
4625 | if (ret != 0) { | |
76d7553f | 4626 | PERROR("pthread_join"); |
099e26bd DG |
4627 | goto error; /* join error, exit without cleanup */ |
4628 | } | |
4629 | ||
4630 | exit_dispatch: | |
cf3af59e MD |
4631 | ret = pthread_join(client_thread, &status); |
4632 | if (ret != 0) { | |
76d7553f | 4633 | PERROR("pthread_join"); |
cf3af59e MD |
4634 | goto error; /* join error, exit without cleanup */ |
4635 | } | |
4636 | ||
3bd1e081 | 4637 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4638 | if (ret != 0) { |
76d7553f | 4639 | PERROR("join_consumer"); |
cf3af59e MD |
4640 | goto error; /* join error, exit without cleanup */ |
4641 | } | |
a88df331 | 4642 | |
cf3af59e | 4643 | exit_client: |
a88df331 | 4644 | exit: |
cf3af59e MD |
4645 | /* |
4646 | * cleanup() is called when no other thread is running. | |
4647 | */ | |
f6a9efaa | 4648 | rcu_thread_online(); |
cf3af59e | 4649 | cleanup(); |
f6a9efaa DG |
4650 | rcu_thread_offline(); |
4651 | rcu_unregister_thread(); | |
67e40797 | 4652 | if (!ret) { |
cf3af59e | 4653 | exit(EXIT_SUCCESS); |
67e40797 | 4654 | } |
cf3af59e | 4655 | error: |
5e16da05 | 4656 | exit(EXIT_FAILURE); |
fac6795d | 4657 | } |