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> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
0fdd1e2c | 28 | #include <sys/mman.h> |
b73401da | 29 | #include <sys/mount.h> |
1e307fab | 30 | #include <sys/resource.h> |
fac6795d DG |
31 | #include <sys/socket.h> |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
0fdd1e2c | 34 | #include <sys/wait.h> |
5c827ce0 | 35 | #include <urcu/uatomic.h> |
fac6795d | 36 | #include <unistd.h> |
3bd1e081 | 37 | #include <config.h> |
fac6795d | 38 | |
990570ed | 39 | #include <common/common.h> |
0ba98ebc | 40 | #include <common/compat/poll.h> |
d27c42b8 | 41 | #include <common/compat/socket.h> |
db758600 DG |
42 | #include <common/defaults.h> |
43 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 44 | #include <common/futex.h> |
00e2e675 | 45 | #include <common/relayd/relayd.h> |
81b86775 | 46 | #include <common/utils.h> |
fac6795d | 47 | |
10a8a223 | 48 | #include "lttng-sessiond.h" |
54d01ffb | 49 | #include "channel.h" |
2f77fc4b | 50 | #include "cmd.h" |
00e2e675 | 51 | #include "consumer.h" |
099e26bd | 52 | #include "context.h" |
54d01ffb | 53 | #include "event.h" |
4771f025 | 54 | #include "kernel.h" |
f1e16794 | 55 | #include "kernel-consumer.h" |
096102bd | 56 | #include "modprobe.h" |
0fdd1e2c | 57 | #include "shm.h" |
1e307fab | 58 | #include "ust-ctl.h" |
00e2e675 | 59 | #include "ust-consumer.h" |
8e68d1c8 | 60 | #include "utils.h" |
4063050c | 61 | #include "fd-limit.h" |
53a80697 | 62 | #include "filter.h" |
44a5e5eb | 63 | #include "health.h" |
8ac94142 | 64 | #include "testpoint.h" |
fac6795d | 65 | |
ebaeda94 MD |
66 | #define CONSUMERD_FILE "lttng-consumerd" |
67 | ||
75462a81 | 68 | /* Const values */ |
686204ab | 69 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 70 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
71 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
72 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
73 | ||
fac6795d DG |
74 | const char *progname; |
75 | const char *opt_tracing_group; | |
5b8719f5 | 76 | static int opt_sig_parent; |
97e19046 | 77 | static int opt_verbose_consumer; |
fac6795d | 78 | static int opt_daemon; |
4fba7219 | 79 | static int opt_no_kernel; |
fac6795d | 80 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 81 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 82 | static char *rundir; |
3bd1e081 | 83 | |
a23ec3a7 DG |
84 | /* |
85 | * Consumer daemon specific control data. Every value not initialized here is | |
86 | * set to 0 by the static definition. | |
87 | */ | |
3bd1e081 MD |
88 | static struct consumer_data kconsumer_data = { |
89 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
90 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
91 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
92 | .err_sock = -1, |
93 | .cmd_sock = -1, | |
173af62f DG |
94 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
95 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
96 | .cond = PTHREAD_COND_INITIALIZER, |
97 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 98 | }; |
7753dea8 MD |
99 | static struct consumer_data ustconsumer64_data = { |
100 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
101 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
102 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
103 | .err_sock = -1, |
104 | .cmd_sock = -1, | |
173af62f DG |
105 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
106 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
107 | .cond = PTHREAD_COND_INITIALIZER, |
108 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
109 | }; |
110 | static struct consumer_data ustconsumer32_data = { | |
111 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
112 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
113 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
114 | .err_sock = -1, |
115 | .cmd_sock = -1, | |
173af62f DG |
116 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
117 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
118 | .cond = PTHREAD_COND_INITIALIZER, |
119 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
120 | }; |
121 | ||
26c9d55e | 122 | /* Shared between threads */ |
099e26bd | 123 | static int dispatch_thread_exit; |
fac6795d | 124 | |
54d01ffb DG |
125 | /* Global application Unix socket path */ |
126 | static char apps_unix_sock_path[PATH_MAX]; | |
127 | /* Global client Unix socket path */ | |
128 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
129 | /* global wait shm path for UST */ |
130 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
131 | /* Global health check unix path */ |
132 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 133 | |
1d4b027a | 134 | /* Sockets and FDs */ |
a4b35e07 MD |
135 | static int client_sock = -1; |
136 | static int apps_sock = -1; | |
2f77fc4b | 137 | int kernel_tracer_fd = -1; |
76d7553f | 138 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 139 | |
273ea72c DG |
140 | /* |
141 | * Quit pipe for all threads. This permits a single cancellation point | |
142 | * for all threads when receiving an event on the pipe. | |
143 | */ | |
76d7553f | 144 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 145 | |
099e26bd DG |
146 | /* |
147 | * This pipe is used to inform the thread managing application communication | |
148 | * that a command is queued and ready to be processed. | |
149 | */ | |
76d7553f | 150 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 151 | |
1d4b027a | 152 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 153 | static pthread_t apps_thread; |
099e26bd | 154 | static pthread_t reg_apps_thread; |
1d4b027a | 155 | static pthread_t client_thread; |
7a485870 | 156 | static pthread_t kernel_thread; |
099e26bd | 157 | static pthread_t dispatch_thread; |
44a5e5eb | 158 | static pthread_t health_thread; |
5eb91c98 | 159 | |
099e26bd DG |
160 | /* |
161 | * UST registration command queue. This queue is tied with a futex and uses a N | |
162 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
163 | * | |
164 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
165 | * this queue and the wait/wake scheme. | |
166 | */ | |
167 | static struct ust_cmd_queue ust_cmd_queue; | |
168 | ||
b5541356 DG |
169 | /* |
170 | * Pointer initialized before thread creation. | |
171 | * | |
172 | * This points to the tracing session list containing the session count and a | |
173 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
174 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 175 | * |
d063d709 | 176 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 177 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
178 | */ |
179 | static struct ltt_session_list *session_list_ptr; | |
180 | ||
7753dea8 MD |
181 | int ust_consumerd64_fd = -1; |
182 | int ust_consumerd32_fd = -1; | |
183 | ||
fb6f1fa2 YB |
184 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
185 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
186 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
187 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 188 | |
2f77fc4b DG |
189 | static const char *module_proc_lttng = "/proc/lttng"; |
190 | ||
5c827ce0 DG |
191 | /* |
192 | * Consumer daemon state which is changed when spawning it, killing it or in | |
193 | * case of a fatal error. | |
194 | */ | |
195 | enum consumerd_state { | |
196 | CONSUMER_STARTED = 1, | |
197 | CONSUMER_STOPPED = 2, | |
198 | CONSUMER_ERROR = 3, | |
199 | }; | |
200 | ||
201 | /* | |
202 | * This consumer daemon state is used to validate if a client command will be | |
203 | * able to reach the consumer. If not, the client is informed. For instance, | |
204 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
205 | * error to the client. | |
206 | * | |
207 | * The following example shows a possible race condition of this scheme: | |
208 | * | |
209 | * consumer thread error happens | |
210 | * client cmd arrives | |
211 | * client cmd checks state -> still OK | |
212 | * consumer thread exit, sets error | |
213 | * client cmd try to talk to consumer | |
214 | * ... | |
215 | * | |
216 | * However, since the consumer is a different daemon, we have no way of making | |
217 | * sure the command will reach it safely even with this state flag. This is why | |
218 | * we consider that up to the state validation during command processing, the | |
219 | * command is safe. After that, we can not guarantee the correctness of the | |
220 | * client request vis-a-vis the consumer. | |
221 | */ | |
222 | static enum consumerd_state ust_consumerd_state; | |
223 | static enum consumerd_state kernel_consumerd_state; | |
224 | ||
44a5e5eb DG |
225 | /* Used for the health monitoring of the session daemon. See health.h */ |
226 | struct health_state health_thread_cmd; | |
139ac872 | 227 | struct health_state health_thread_app_manage; |
44a5e5eb DG |
228 | struct health_state health_thread_app_reg; |
229 | struct health_state health_thread_kernel; | |
230 | ||
ae9e45b3 DG |
231 | /* |
232 | * Socket timeout for receiving and sending in seconds. | |
233 | */ | |
234 | static int app_socket_timeout; | |
235 | ||
fb09408a | 236 | static |
7753dea8 | 237 | void setup_consumerd_path(void) |
fb09408a | 238 | { |
fc7a59ce | 239 | const char *bin, *libdir; |
fb09408a | 240 | |
7753dea8 MD |
241 | /* |
242 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
243 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
244 | * has not been defined. | |
7753dea8 | 245 | */ |
ebaeda94 | 246 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
247 | if (!consumerd32_bin[0]) { |
248 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
249 | } |
250 | if (!consumerd32_libdir[0]) { | |
251 | consumerd32_libdir = INSTALL_LIB_PATH; | |
252 | } | |
253 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
254 | if (!consumerd64_bin[0]) { |
255 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 256 | } |
ebaeda94 MD |
257 | if (!consumerd64_libdir[0]) { |
258 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
259 | } |
260 | #else | |
261 | #error "Unknown bitness" | |
262 | #endif | |
263 | ||
fb09408a MD |
264 | /* |
265 | * runtime env. var. overrides the build default. | |
266 | */ | |
fc7a59ce AM |
267 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
268 | if (bin) { | |
269 | consumerd32_bin = bin; | |
7753dea8 | 270 | } |
fc7a59ce AM |
271 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
272 | if (bin) { | |
273 | consumerd64_bin = bin; | |
ebaeda94 | 274 | } |
72f579ee | 275 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
276 | if (libdir) { |
277 | consumerd32_libdir = libdir; | |
278 | } | |
72f579ee | 279 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
280 | if (libdir) { |
281 | consumerd64_libdir = libdir; | |
fb09408a MD |
282 | } |
283 | } | |
284 | ||
5eb91c98 DG |
285 | /* |
286 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
287 | */ | |
288 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
289 | unsigned int size) | |
290 | { | |
291 | int ret; | |
292 | ||
293 | if (events == NULL || size == 0) { | |
294 | ret = -1; | |
295 | goto error; | |
296 | } | |
297 | ||
298 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
299 | if (ret < 0) { | |
300 | goto error; | |
301 | } | |
302 | ||
303 | /* Add quit pipe */ | |
304 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
305 | if (ret < 0) { | |
306 | goto error; | |
307 | } | |
308 | ||
309 | return 0; | |
310 | ||
311 | error: | |
312 | return ret; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Check if the thread quit pipe was triggered. | |
317 | * | |
318 | * Return 1 if it was triggered else 0; | |
319 | */ | |
320 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
321 | { | |
322 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
323 | return 1; | |
324 | } | |
325 | ||
326 | return 0; | |
327 | } | |
328 | ||
0fdd1e2c DG |
329 | /* |
330 | * Return group ID of the tracing group or -1 if not found. | |
331 | */ | |
996b65c8 MD |
332 | static gid_t allowed_group(void) |
333 | { | |
334 | struct group *grp; | |
335 | ||
274e143b MD |
336 | if (opt_tracing_group) { |
337 | grp = getgrnam(opt_tracing_group); | |
338 | } else { | |
339 | grp = getgrnam(default_tracing_group); | |
340 | } | |
996b65c8 MD |
341 | if (!grp) { |
342 | return -1; | |
343 | } else { | |
344 | return grp->gr_gid; | |
345 | } | |
346 | } | |
347 | ||
273ea72c | 348 | /* |
5eb91c98 | 349 | * Init thread quit pipe. |
273ea72c DG |
350 | * |
351 | * Return -1 on error or 0 if all pipes are created. | |
352 | */ | |
353 | static int init_thread_quit_pipe(void) | |
354 | { | |
730389d9 | 355 | int ret, i; |
273ea72c | 356 | |
730389d9 | 357 | ret = pipe(thread_quit_pipe); |
273ea72c | 358 | if (ret < 0) { |
730389d9 | 359 | PERROR("thread quit pipe"); |
273ea72c DG |
360 | goto error; |
361 | } | |
362 | ||
730389d9 DG |
363 | for (i = 0; i < 2; i++) { |
364 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
365 | if (ret < 0) { | |
366 | PERROR("fcntl"); | |
367 | goto error; | |
368 | } | |
369 | } | |
370 | ||
273ea72c DG |
371 | error: |
372 | return ret; | |
373 | } | |
374 | ||
099e26bd DG |
375 | /* |
376 | * Stop all threads by closing the thread quit pipe. | |
377 | */ | |
cf3af59e MD |
378 | static void stop_threads(void) |
379 | { | |
5eb91c98 DG |
380 | int ret; |
381 | ||
cf3af59e MD |
382 | /* Stopping all threads */ |
383 | DBG("Terminating all threads"); | |
54d01ffb | 384 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
385 | if (ret < 0) { |
386 | ERR("write error on thread quit pipe"); | |
387 | } | |
388 | ||
099e26bd | 389 | /* Dispatch thread */ |
26c9d55e | 390 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 391 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
392 | } |
393 | ||
fac6795d | 394 | /* |
d063d709 | 395 | * Cleanup the daemon |
fac6795d | 396 | */ |
cf3af59e | 397 | static void cleanup(void) |
fac6795d | 398 | { |
ef599319 | 399 | int ret; |
1d4b027a | 400 | char *cmd; |
af9737e9 | 401 | struct ltt_session *sess, *stmp; |
fac6795d | 402 | |
1d4b027a | 403 | DBG("Cleaning up"); |
e07ae692 | 404 | |
2f77fc4b DG |
405 | /* First thing first, stop all threads */ |
406 | utils_close_pipe(thread_quit_pipe); | |
407 | ||
67e40797 DG |
408 | DBG("Removing %s directory", rundir); |
409 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
410 | if (ret < 0) { | |
411 | ERR("asprintf failed. Something is really wrong!"); | |
412 | } | |
5461b305 | 413 | |
67e40797 DG |
414 | /* Remove lttng run directory */ |
415 | ret = system(cmd); | |
416 | if (ret < 0) { | |
417 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 418 | } |
67e40797 | 419 | free(cmd); |
bd69add2 | 420 | free(rundir); |
5461b305 | 421 | |
99bab54f | 422 | DBG("Cleaning up all sessions"); |
fac6795d | 423 | |
b5541356 | 424 | /* Destroy session list mutex */ |
273ea72c DG |
425 | if (session_list_ptr != NULL) { |
426 | pthread_mutex_destroy(&session_list_ptr->lock); | |
427 | ||
428 | /* Cleanup ALL session */ | |
54d01ffb DG |
429 | cds_list_for_each_entry_safe(sess, stmp, |
430 | &session_list_ptr->head, list) { | |
2f77fc4b | 431 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
432 | } |
433 | } | |
434 | ||
099e26bd | 435 | DBG("Closing all UST sockets"); |
56fff090 | 436 | ust_app_clean_list(); |
099e26bd | 437 | |
4fba7219 DG |
438 | if (is_root && !opt_no_kernel) { |
439 | DBG2("Closing kernel fd"); | |
a4b35e07 | 440 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
441 | ret = close(kernel_tracer_fd); |
442 | if (ret) { | |
443 | PERROR("close"); | |
444 | } | |
a4b35e07 | 445 | } |
2f50c8a3 | 446 | DBG("Unloading kernel modules"); |
096102bd | 447 | modprobe_remove_lttng_all(); |
2f50c8a3 | 448 | } |
2f77fc4b | 449 | |
ef599319 | 450 | utils_close_pipe(kernel_poll_pipe); |
ef599319 | 451 | utils_close_pipe(apps_cmd_pipe); |
421cb601 DG |
452 | |
453 | /* <fun> */ | |
f56a39af | 454 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
455 | "Matthew, BEET driven development works!%c[%dm", |
456 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
457 | /* </fun> */ | |
fac6795d DG |
458 | } |
459 | ||
e065084a | 460 | /* |
d063d709 | 461 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 462 | * |
d063d709 | 463 | * Return lttcomm error code. |
e065084a DG |
464 | */ |
465 | static int send_unix_sock(int sock, void *buf, size_t len) | |
466 | { | |
467 | /* Check valid length */ | |
468 | if (len <= 0) { | |
469 | return -1; | |
470 | } | |
471 | ||
472 | return lttcomm_send_unix_sock(sock, buf, len); | |
473 | } | |
474 | ||
5461b305 | 475 | /* |
d063d709 | 476 | * Free memory of a command context structure. |
5461b305 | 477 | */ |
a2fb29a5 | 478 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 479 | { |
a2fb29a5 DG |
480 | DBG("Clean command context structure"); |
481 | if (*cmd_ctx) { | |
482 | if ((*cmd_ctx)->llm) { | |
483 | free((*cmd_ctx)->llm); | |
5461b305 | 484 | } |
a2fb29a5 DG |
485 | if ((*cmd_ctx)->lsm) { |
486 | free((*cmd_ctx)->lsm); | |
5461b305 | 487 | } |
a2fb29a5 DG |
488 | free(*cmd_ctx); |
489 | *cmd_ctx = NULL; | |
5461b305 DG |
490 | } |
491 | } | |
492 | ||
fac6795d | 493 | /* |
0fdd1e2c | 494 | * Notify UST applications using the shm mmap futex. |
fac6795d | 495 | */ |
0fdd1e2c | 496 | static int notify_ust_apps(int active) |
fac6795d | 497 | { |
0fdd1e2c | 498 | char *wait_shm_mmap; |
fac6795d | 499 | |
0fdd1e2c | 500 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 501 | |
0fdd1e2c DG |
502 | /* See shm.c for this call implying mmap, shm and futex calls */ |
503 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
504 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
505 | goto error; |
506 | } | |
507 | ||
0fdd1e2c DG |
508 | /* Wake waiting process */ |
509 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
510 | ||
511 | /* Apps notified successfully */ | |
512 | return 0; | |
fac6795d DG |
513 | |
514 | error: | |
0fdd1e2c | 515 | return -1; |
fac6795d DG |
516 | } |
517 | ||
e065084a | 518 | /* |
d063d709 DG |
519 | * Setup the outgoing data buffer for the response (llm) by allocating the |
520 | * right amount of memory and copying the original information from the lsm | |
521 | * structure. | |
ca95a216 | 522 | * |
d063d709 | 523 | * Return total size of the buffer pointed by buf. |
ca95a216 | 524 | */ |
5461b305 | 525 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 526 | { |
f3ed775e | 527 | int ret, buf_size; |
ca95a216 | 528 | |
f3ed775e | 529 | buf_size = size; |
5461b305 | 530 | |
ba7f0ae5 | 531 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 532 | if (cmd_ctx->llm == NULL) { |
76d7553f | 533 | PERROR("zmalloc"); |
5461b305 | 534 | ret = -ENOMEM; |
ca95a216 DG |
535 | goto error; |
536 | } | |
537 | ||
5461b305 DG |
538 | /* Copy common data */ |
539 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 540 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 541 | |
5461b305 DG |
542 | cmd_ctx->llm->data_size = size; |
543 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
544 | ||
ca95a216 DG |
545 | return buf_size; |
546 | ||
547 | error: | |
548 | return ret; | |
549 | } | |
550 | ||
7a485870 | 551 | /* |
5eb91c98 | 552 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 553 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 554 | */ |
5eb91c98 | 555 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 556 | { |
5eb91c98 | 557 | int ret; |
7a485870 DG |
558 | struct ltt_session *session; |
559 | struct ltt_kernel_channel *channel; | |
560 | ||
5eb91c98 | 561 | DBG("Updating kernel poll set"); |
7a485870 | 562 | |
54d01ffb | 563 | session_lock_list(); |
b5541356 | 564 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 565 | session_lock(session); |
7a485870 | 566 | if (session->kernel_session == NULL) { |
54d01ffb | 567 | session_unlock(session); |
7a485870 DG |
568 | continue; |
569 | } | |
7a485870 | 570 | |
54d01ffb DG |
571 | cds_list_for_each_entry(channel, |
572 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
573 | /* Add channel fd to the kernel poll set */ |
574 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
575 | if (ret < 0) { | |
54d01ffb | 576 | session_unlock(session); |
5eb91c98 DG |
577 | goto error; |
578 | } | |
579 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 580 | } |
54d01ffb | 581 | session_unlock(session); |
7a485870 | 582 | } |
54d01ffb | 583 | session_unlock_list(); |
7a485870 | 584 | |
5eb91c98 | 585 | return 0; |
7a485870 DG |
586 | |
587 | error: | |
54d01ffb | 588 | session_unlock_list(); |
7a485870 DG |
589 | return -1; |
590 | } | |
591 | ||
592 | /* | |
54d01ffb | 593 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 594 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 595 | * |
d063d709 | 596 | * Useful for CPU hotplug feature. |
7a485870 | 597 | */ |
2bdd86d4 | 598 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
599 | { |
600 | int ret = 0; | |
601 | struct ltt_session *session; | |
173af62f | 602 | struct ltt_kernel_session *ksess; |
7a485870 DG |
603 | struct ltt_kernel_channel *channel; |
604 | ||
605 | DBG("Updating kernel streams for channel fd %d", fd); | |
606 | ||
54d01ffb | 607 | session_lock_list(); |
b5541356 | 608 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 609 | session_lock(session); |
7a485870 | 610 | if (session->kernel_session == NULL) { |
54d01ffb | 611 | session_unlock(session); |
7a485870 DG |
612 | continue; |
613 | } | |
173af62f | 614 | ksess = session->kernel_session; |
d9800920 | 615 | |
173af62f | 616 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
617 | if (channel->fd == fd) { |
618 | DBG("Channel found, updating kernel streams"); | |
619 | ret = kernel_open_channel_stream(channel); | |
620 | if (ret < 0) { | |
b3c750d2 | 621 | goto error; |
7a485870 | 622 | } |
d9800920 | 623 | |
7a485870 | 624 | /* |
5eb91c98 DG |
625 | * Have we already sent fds to the consumer? If yes, it means |
626 | * that tracing is started so it is safe to send our updated | |
627 | * stream fds. | |
7a485870 | 628 | */ |
173af62f DG |
629 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
630 | struct lttng_ht_iter iter; | |
631 | struct consumer_socket *socket; | |
632 | ||
633 | ||
634 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
635 | &iter.iter, socket, node.node) { | |
636 | /* Code flow error */ | |
637 | assert(socket->fd >= 0); | |
638 | ||
639 | pthread_mutex_lock(socket->lock); | |
640 | ret = kernel_consumer_send_channel_stream(socket->fd, | |
641 | channel, ksess); | |
642 | pthread_mutex_unlock(socket->lock); | |
643 | if (ret < 0) { | |
644 | goto error; | |
645 | } | |
7a485870 DG |
646 | } |
647 | } | |
b3c750d2 | 648 | goto error; |
7a485870 DG |
649 | } |
650 | } | |
54d01ffb | 651 | session_unlock(session); |
7a485870 | 652 | } |
54d01ffb | 653 | session_unlock_list(); |
b3c750d2 | 654 | return ret; |
7a485870 | 655 | |
b3c750d2 | 656 | error: |
54d01ffb DG |
657 | session_unlock(session); |
658 | session_unlock_list(); | |
7a485870 DG |
659 | return ret; |
660 | } | |
661 | ||
487cf67c DG |
662 | /* |
663 | * For each tracing session, update newly registered apps. | |
664 | */ | |
665 | static void update_ust_app(int app_sock) | |
666 | { | |
667 | struct ltt_session *sess, *stmp; | |
668 | ||
4ee14516 DG |
669 | session_lock_list(); |
670 | ||
487cf67c DG |
671 | /* For all tracing session(s) */ |
672 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 673 | session_lock(sess); |
421cb601 DG |
674 | if (sess->ust_session) { |
675 | ust_app_global_update(sess->ust_session, app_sock); | |
676 | } | |
4ee14516 | 677 | session_unlock(sess); |
487cf67c | 678 | } |
4ee14516 DG |
679 | |
680 | session_unlock_list(); | |
487cf67c DG |
681 | } |
682 | ||
7a485870 | 683 | /* |
d063d709 | 684 | * This thread manage event coming from the kernel. |
7a485870 | 685 | * |
d063d709 DG |
686 | * Features supported in this thread: |
687 | * -) CPU Hotplug | |
7a485870 DG |
688 | */ |
689 | static void *thread_manage_kernel(void *data) | |
690 | { | |
139ac872 | 691 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 692 | uint32_t revents, nb_fd; |
7a485870 | 693 | char tmp; |
5eb91c98 | 694 | struct lttng_poll_event events; |
7a485870 DG |
695 | |
696 | DBG("Thread manage kernel started"); | |
697 | ||
8ac94142 CB |
698 | testpoint(thread_manage_kernel); |
699 | ||
44a5e5eb DG |
700 | health_code_update(&health_thread_kernel); |
701 | ||
8ac94142 CB |
702 | testpoint(thread_manage_kernel_before_loop); |
703 | ||
5eb91c98 DG |
704 | ret = create_thread_poll_set(&events, 2); |
705 | if (ret < 0) { | |
76d7553f | 706 | goto error_poll_create; |
5eb91c98 DG |
707 | } |
708 | ||
709 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
710 | if (ret < 0) { | |
711 | goto error; | |
712 | } | |
713 | ||
7a485870 | 714 | while (1) { |
44a5e5eb DG |
715 | health_code_update(&health_thread_kernel); |
716 | ||
7a485870 | 717 | if (update_poll_flag == 1) { |
5f822d0a DG |
718 | /* |
719 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
720 | * quit pipe and the kernel pipe. | |
721 | */ | |
722 | events.nb_fd = 2; | |
723 | ||
5eb91c98 DG |
724 | ret = update_kernel_poll(&events); |
725 | if (ret < 0) { | |
7a485870 DG |
726 | goto error; |
727 | } | |
728 | update_poll_flag = 0; | |
729 | } | |
730 | ||
5eb91c98 DG |
731 | nb_fd = LTTNG_POLL_GETNB(&events); |
732 | ||
733 | DBG("Thread kernel polling on %d fds", nb_fd); | |
734 | ||
735 | /* Zeroed the poll events */ | |
736 | lttng_poll_reset(&events); | |
7a485870 DG |
737 | |
738 | /* Poll infinite value of time */ | |
88f2b785 | 739 | restart: |
44a5e5eb | 740 | health_poll_update(&health_thread_kernel); |
5eb91c98 | 741 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 742 | health_poll_update(&health_thread_kernel); |
7a485870 | 743 | if (ret < 0) { |
88f2b785 MD |
744 | /* |
745 | * Restart interrupted system call. | |
746 | */ | |
747 | if (errno == EINTR) { | |
748 | goto restart; | |
749 | } | |
7a485870 DG |
750 | goto error; |
751 | } else if (ret == 0) { | |
752 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
753 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
754 | "This should not have happened! Continuing..."); | |
7a485870 DG |
755 | continue; |
756 | } | |
757 | ||
5eb91c98 DG |
758 | for (i = 0; i < nb_fd; i++) { |
759 | /* Fetch once the poll data */ | |
760 | revents = LTTNG_POLL_GETEV(&events, i); | |
761 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 762 | |
44a5e5eb DG |
763 | health_code_update(&health_thread_kernel); |
764 | ||
5eb91c98 DG |
765 | /* Thread quit pipe has been closed. Killing thread. */ |
766 | ret = check_thread_quit_pipe(pollfd, revents); | |
767 | if (ret) { | |
139ac872 MD |
768 | err = 0; |
769 | goto exit; | |
5eb91c98 | 770 | } |
7a485870 | 771 | |
5eb91c98 DG |
772 | /* Check for data on kernel pipe */ |
773 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
774 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
775 | update_poll_flag = 1; | |
776 | continue; | |
777 | } else { | |
778 | /* | |
779 | * New CPU detected by the kernel. Adding kernel stream to | |
780 | * kernel session and updating the kernel consumer | |
781 | */ | |
782 | if (revents & LPOLLIN) { | |
2bdd86d4 | 783 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
784 | if (ret < 0) { |
785 | continue; | |
786 | } | |
787 | break; | |
788 | /* | |
789 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
790 | * and unregister kernel stream at this point. | |
791 | */ | |
7a485870 | 792 | } |
7a485870 DG |
793 | } |
794 | } | |
795 | } | |
796 | ||
139ac872 | 797 | exit: |
7a485870 | 798 | error: |
5eb91c98 | 799 | lttng_poll_clean(&events); |
76d7553f | 800 | error_poll_create: |
139ac872 MD |
801 | if (err) { |
802 | health_error(&health_thread_kernel); | |
803 | ERR("Health error occurred in %s", __func__); | |
804 | } | |
805 | health_exit(&health_thread_kernel); | |
76d7553f | 806 | DBG("Kernel thread dying"); |
7a485870 DG |
807 | return NULL; |
808 | } | |
809 | ||
a23ec3a7 DG |
810 | /* |
811 | * Signal pthread condition of the consumer data that the thread. | |
812 | */ | |
813 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
814 | { | |
815 | pthread_mutex_lock(&data->cond_mutex); | |
816 | ||
817 | /* | |
818 | * The state is set before signaling. It can be any value, it's the waiter | |
819 | * job to correctly interpret this condition variable associated to the | |
820 | * consumer pthread_cond. | |
821 | * | |
822 | * A value of 0 means that the corresponding thread of the consumer data | |
823 | * was not started. 1 indicates that the thread has started and is ready | |
824 | * for action. A negative value means that there was an error during the | |
825 | * thread bootstrap. | |
826 | */ | |
827 | data->consumer_thread_is_ready = state; | |
828 | (void) pthread_cond_signal(&data->cond); | |
829 | ||
830 | pthread_mutex_unlock(&data->cond_mutex); | |
831 | } | |
832 | ||
1d4b027a | 833 | /* |
3bd1e081 | 834 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 835 | */ |
3bd1e081 | 836 | static void *thread_manage_consumer(void *data) |
1d4b027a | 837 | { |
139ac872 | 838 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 839 | uint32_t revents, nb_fd; |
1d4b027a | 840 | enum lttcomm_return_code code; |
5eb91c98 | 841 | struct lttng_poll_event events; |
3bd1e081 | 842 | struct consumer_data *consumer_data = data; |
1d4b027a | 843 | |
3bd1e081 | 844 | DBG("[thread] Manage consumer started"); |
1d4b027a | 845 | |
9449cc75 DG |
846 | /* |
847 | * Since the consumer thread can be spawned at any moment in time, we init | |
848 | * the health to a poll status (1, which is a valid health over time). | |
849 | * When the thread starts, we update here the health to a "code" path being | |
850 | * an even value so this thread, when reaching a poll wait, does not | |
851 | * trigger an error with an even value. | |
852 | * | |
853 | * Here is the use case we avoid. | |
854 | * | |
855 | * +1: the first poll update during initialization (main()) | |
856 | * +2 * x: multiple code update once in this thread. | |
857 | * +1: poll wait in this thread (being a good health state). | |
858 | * == even number which after the wait period shows as a bad health. | |
859 | * | |
860 | * In a nutshell, the following poll update to the health state brings back | |
861 | * the state to an even value meaning a code path. | |
862 | */ | |
863 | health_poll_update(&consumer_data->health); | |
864 | ||
5eb91c98 DG |
865 | /* |
866 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
867 | * Nothing more will be added to this poll set. | |
868 | */ | |
869 | ret = create_thread_poll_set(&events, 2); | |
870 | if (ret < 0) { | |
76d7553f | 871 | goto error_poll; |
5eb91c98 | 872 | } |
273ea72c | 873 | |
edb8b045 DG |
874 | /* |
875 | * The error socket here is already in a listening state which was done | |
876 | * just before spawning this thread to avoid a race between the consumer | |
877 | * daemon exec trying to connect and the listen() call. | |
878 | */ | |
3bd1e081 | 879 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
880 | if (ret < 0) { |
881 | goto error; | |
882 | } | |
883 | ||
884 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c | 885 | |
44a5e5eb DG |
886 | health_code_update(&consumer_data->health); |
887 | ||
273ea72c | 888 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 889 | restart: |
44a5e5eb | 890 | health_poll_update(&consumer_data->health); |
8ac94142 CB |
891 | |
892 | testpoint(thread_manage_consumer); | |
893 | ||
5eb91c98 | 894 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 895 | health_poll_update(&consumer_data->health); |
273ea72c | 896 | if (ret < 0) { |
88f2b785 MD |
897 | /* |
898 | * Restart interrupted system call. | |
899 | */ | |
900 | if (errno == EINTR) { | |
901 | goto restart; | |
902 | } | |
273ea72c DG |
903 | goto error; |
904 | } | |
905 | ||
5eb91c98 DG |
906 | for (i = 0; i < nb_fd; i++) { |
907 | /* Fetch once the poll data */ | |
908 | revents = LTTNG_POLL_GETEV(&events, i); | |
909 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
910 | ||
44a5e5eb DG |
911 | health_code_update(&consumer_data->health); |
912 | ||
5eb91c98 DG |
913 | /* Thread quit pipe has been closed. Killing thread. */ |
914 | ret = check_thread_quit_pipe(pollfd, revents); | |
915 | if (ret) { | |
139ac872 MD |
916 | err = 0; |
917 | goto exit; | |
5eb91c98 DG |
918 | } |
919 | ||
920 | /* Event on the registration socket */ | |
3bd1e081 | 921 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 922 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 923 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
924 | goto error; |
925 | } | |
926 | } | |
273ea72c DG |
927 | } |
928 | ||
3bd1e081 | 929 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
930 | if (sock < 0) { |
931 | goto error; | |
932 | } | |
933 | ||
b662582b DG |
934 | /* |
935 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
936 | * show must go on. | |
937 | */ | |
938 | (void) utils_set_fd_cloexec(sock); | |
939 | ||
44a5e5eb DG |
940 | health_code_update(&consumer_data->health); |
941 | ||
3bd1e081 | 942 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 943 | |
712ea556 | 944 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
945 | ret = lttcomm_recv_unix_sock(sock, &code, |
946 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
947 | if (ret <= 0) { |
948 | goto error; | |
949 | } | |
950 | ||
44a5e5eb DG |
951 | health_code_update(&consumer_data->health); |
952 | ||
f73fabfd | 953 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 MD |
954 | consumer_data->cmd_sock = |
955 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
956 | if (consumer_data->cmd_sock < 0) { | |
a23ec3a7 DG |
957 | /* On error, signal condition and quit. */ |
958 | signal_consumer_condition(consumer_data, -1); | |
48842b30 | 959 | PERROR("consumer connect"); |
1d4b027a DG |
960 | goto error; |
961 | } | |
a23ec3a7 DG |
962 | signal_consumer_condition(consumer_data, 1); |
963 | DBG("Consumer command socket ready"); | |
1d4b027a | 964 | } else { |
3bd1e081 | 965 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
966 | lttcomm_get_readable_code(-code)); |
967 | goto error; | |
968 | } | |
969 | ||
54d01ffb | 970 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 971 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 972 | if (ret < 0) { |
72079cae DG |
973 | goto error; |
974 | } | |
975 | ||
5eb91c98 DG |
976 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
977 | if (ret < 0) { | |
72079cae | 978 | goto error; |
5eb91c98 DG |
979 | } |
980 | ||
44a5e5eb DG |
981 | health_code_update(&consumer_data->health); |
982 | ||
5eb91c98 DG |
983 | /* Update number of fd */ |
984 | nb_fd = LTTNG_POLL_GETNB(&events); | |
985 | ||
986 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 987 | restart_poll: |
44a5e5eb | 988 | health_poll_update(&consumer_data->health); |
5eb91c98 | 989 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 990 | health_poll_update(&consumer_data->health); |
5eb91c98 | 991 | if (ret < 0) { |
88f2b785 MD |
992 | /* |
993 | * Restart interrupted system call. | |
994 | */ | |
995 | if (errno == EINTR) { | |
996 | goto restart_poll; | |
997 | } | |
72079cae DG |
998 | goto error; |
999 | } | |
1000 | ||
5eb91c98 DG |
1001 | for (i = 0; i < nb_fd; i++) { |
1002 | /* Fetch once the poll data */ | |
1003 | revents = LTTNG_POLL_GETEV(&events, i); | |
1004 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1005 | ||
44a5e5eb DG |
1006 | health_code_update(&consumer_data->health); |
1007 | ||
5eb91c98 DG |
1008 | /* Thread quit pipe has been closed. Killing thread. */ |
1009 | ret = check_thread_quit_pipe(pollfd, revents); | |
1010 | if (ret) { | |
139ac872 MD |
1011 | err = 0; |
1012 | goto exit; | |
5eb91c98 DG |
1013 | } |
1014 | ||
1015 | /* Event on the kconsumerd socket */ | |
1016 | if (pollfd == sock) { | |
1017 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1018 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1019 | goto error; |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | ||
44a5e5eb DG |
1024 | health_code_update(&consumer_data->health); |
1025 | ||
712ea556 | 1026 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1027 | ret = lttcomm_recv_unix_sock(sock, &code, |
1028 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1029 | if (ret <= 0) { |
3bd1e081 | 1030 | ERR("consumer closed the command socket"); |
712ea556 | 1031 | goto error; |
6f61d021 | 1032 | } |
1d4b027a | 1033 | |
3bd1e081 | 1034 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1035 | |
139ac872 | 1036 | exit: |
1d4b027a | 1037 | error: |
5c827ce0 DG |
1038 | /* Immediately set the consumerd state to stopped */ |
1039 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1040 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1041 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1042 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1043 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1044 | } else { | |
1045 | /* Code flow error... */ | |
1046 | assert(0); | |
1047 | } | |
1048 | ||
76d7553f MD |
1049 | if (consumer_data->err_sock >= 0) { |
1050 | ret = close(consumer_data->err_sock); | |
1051 | if (ret) { | |
1052 | PERROR("close"); | |
1053 | } | |
1054 | } | |
1055 | if (consumer_data->cmd_sock >= 0) { | |
1056 | ret = close(consumer_data->cmd_sock); | |
1057 | if (ret) { | |
1058 | PERROR("close"); | |
1059 | } | |
1060 | } | |
1061 | if (sock >= 0) { | |
1062 | ret = close(sock); | |
1063 | if (ret) { | |
1064 | PERROR("close"); | |
1065 | } | |
1066 | } | |
273ea72c | 1067 | |
3bd1e081 MD |
1068 | unlink(consumer_data->err_unix_sock_path); |
1069 | unlink(consumer_data->cmd_unix_sock_path); | |
1070 | consumer_data->pid = 0; | |
1d4b027a | 1071 | |
5eb91c98 | 1072 | lttng_poll_clean(&events); |
76d7553f | 1073 | error_poll: |
139ac872 MD |
1074 | if (err) { |
1075 | health_error(&consumer_data->health); | |
1076 | ERR("Health error occurred in %s", __func__); | |
1077 | } | |
1078 | health_exit(&consumer_data->health); | |
76d7553f | 1079 | DBG("consumer thread cleanup completed"); |
0177d773 | 1080 | |
5eb91c98 | 1081 | return NULL; |
099e26bd DG |
1082 | } |
1083 | ||
099e26bd DG |
1084 | /* |
1085 | * This thread manage application communication. | |
1d4b027a DG |
1086 | */ |
1087 | static void *thread_manage_apps(void *data) | |
099e26bd | 1088 | { |
139ac872 | 1089 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1090 | uint32_t revents, nb_fd; |
099e26bd | 1091 | struct ust_command ust_cmd; |
5eb91c98 | 1092 | struct lttng_poll_event events; |
099e26bd DG |
1093 | |
1094 | DBG("[thread] Manage application started"); | |
1095 | ||
8ac94142 CB |
1096 | testpoint(thread_manage_apps); |
1097 | ||
f6a9efaa DG |
1098 | rcu_register_thread(); |
1099 | rcu_thread_online(); | |
1100 | ||
139ac872 | 1101 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1102 | |
5eb91c98 DG |
1103 | ret = create_thread_poll_set(&events, 2); |
1104 | if (ret < 0) { | |
76d7553f | 1105 | goto error_poll_create; |
5eb91c98 | 1106 | } |
099e26bd | 1107 | |
5eb91c98 DG |
1108 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1109 | if (ret < 0) { | |
1110 | goto error; | |
1111 | } | |
099e26bd | 1112 | |
8ac94142 CB |
1113 | testpoint(thread_manage_apps_before_loop); |
1114 | ||
139ac872 | 1115 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1116 | |
5eb91c98 DG |
1117 | while (1) { |
1118 | /* Zeroed the events structure */ | |
1119 | lttng_poll_reset(&events); | |
0177d773 | 1120 | |
5eb91c98 | 1121 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1122 | |
1123 | DBG("Apps thread polling on %d fds", nb_fd); | |
1124 | ||
1125 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1126 | restart: |
139ac872 | 1127 | health_poll_update(&health_thread_app_manage); |
5eb91c98 | 1128 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1129 | health_poll_update(&health_thread_app_manage); |
099e26bd | 1130 | if (ret < 0) { |
88f2b785 MD |
1131 | /* |
1132 | * Restart interrupted system call. | |
1133 | */ | |
1134 | if (errno == EINTR) { | |
1135 | goto restart; | |
1136 | } | |
099e26bd DG |
1137 | goto error; |
1138 | } | |
1139 | ||
5eb91c98 DG |
1140 | for (i = 0; i < nb_fd; i++) { |
1141 | /* Fetch once the poll data */ | |
1142 | revents = LTTNG_POLL_GETEV(&events, i); | |
1143 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1144 | ||
139ac872 | 1145 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1146 | |
5eb91c98 DG |
1147 | /* Thread quit pipe has been closed. Killing thread. */ |
1148 | ret = check_thread_quit_pipe(pollfd, revents); | |
1149 | if (ret) { | |
139ac872 MD |
1150 | err = 0; |
1151 | goto exit; | |
5eb91c98 | 1152 | } |
099e26bd | 1153 | |
5eb91c98 DG |
1154 | /* Inspect the apps cmd pipe */ |
1155 | if (pollfd == apps_cmd_pipe[0]) { | |
1156 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1157 | ERR("Apps command pipe error"); | |
0177d773 | 1158 | goto error; |
5eb91c98 DG |
1159 | } else if (revents & LPOLLIN) { |
1160 | /* Empty pipe */ | |
1161 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1162 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1163 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1164 | goto error; |
1165 | } | |
099e26bd | 1166 | |
139ac872 | 1167 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1168 | |
5eb91c98 | 1169 | /* Register applicaton to the session daemon */ |
56fff090 | 1170 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1171 | ust_cmd.sock); |
88ff5b7f | 1172 | if (ret == -ENOMEM) { |
5eb91c98 | 1173 | goto error; |
88ff5b7f MD |
1174 | } else if (ret < 0) { |
1175 | break; | |
5eb91c98 DG |
1176 | } |
1177 | ||
139ac872 | 1178 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1179 | |
acc7b41b | 1180 | /* |
e0c7ec2b | 1181 | * Validate UST version compatibility. |
acc7b41b | 1182 | */ |
e0c7ec2b DG |
1183 | ret = ust_app_validate_version(ust_cmd.sock); |
1184 | if (ret >= 0) { | |
1185 | /* | |
1186 | * Add channel(s) and event(s) to newly registered apps | |
1187 | * from lttng global UST domain. | |
1188 | */ | |
1189 | update_ust_app(ust_cmd.sock); | |
1190 | } | |
acc7b41b | 1191 | |
139ac872 | 1192 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1193 | |
f2ca2e25 | 1194 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1195 | if (ret < 0) { |
1196 | /* | |
1197 | * If the registration is not possible, we simply | |
1198 | * unregister the apps and continue | |
1199 | */ | |
56fff090 | 1200 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1201 | } else { |
1202 | /* | |
622c9ecf DG |
1203 | * We only monitor the error events of the socket. This |
1204 | * thread does not handle any incoming data from UST | |
1205 | * (POLLIN). | |
5eb91c98 | 1206 | */ |
622c9ecf DG |
1207 | ret = lttng_poll_add(&events, ust_cmd.sock, |
1208 | LPOLLERR & LPOLLHUP & LPOLLRDHUP); | |
5eb91c98 DG |
1209 | if (ret < 0) { |
1210 | goto error; | |
1211 | } | |
1212 | ||
ae9e45b3 DG |
1213 | /* Set socket timeout for both receiving and ending */ |
1214 | (void) lttcomm_setsockopt_rcv_timeout(ust_cmd.sock, | |
1215 | app_socket_timeout); | |
1216 | (void) lttcomm_setsockopt_snd_timeout(ust_cmd.sock, | |
1217 | app_socket_timeout); | |
1218 | ||
54d01ffb DG |
1219 | DBG("Apps with sock %d added to poll set", |
1220 | ust_cmd.sock); | |
5eb91c98 | 1221 | } |
487cf67c | 1222 | |
139ac872 | 1223 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1224 | |
5eb91c98 | 1225 | break; |
0177d773 | 1226 | } |
5eb91c98 DG |
1227 | } else { |
1228 | /* | |
54d01ffb DG |
1229 | * At this point, we know that a registered application made |
1230 | * the event at poll_wait. | |
5eb91c98 DG |
1231 | */ |
1232 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1233 | /* Removing from the poll set */ | |
1234 | ret = lttng_poll_del(&events, pollfd); | |
1235 | if (ret < 0) { | |
1236 | goto error; | |
1237 | } | |
099e26bd | 1238 | |
b9d9b220 | 1239 | /* Socket closed on remote end. */ |
56fff090 | 1240 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1241 | break; |
1242 | } | |
099e26bd | 1243 | } |
44a5e5eb | 1244 | |
139ac872 | 1245 | health_code_update(&health_thread_app_manage); |
099e26bd | 1246 | } |
099e26bd DG |
1247 | } |
1248 | ||
139ac872 | 1249 | exit: |
099e26bd | 1250 | error: |
5eb91c98 | 1251 | lttng_poll_clean(&events); |
76d7553f | 1252 | error_poll_create: |
139ac872 MD |
1253 | if (err) { |
1254 | health_error(&health_thread_app_manage); | |
1255 | ERR("Health error occurred in %s", __func__); | |
1256 | } | |
1257 | health_exit(&health_thread_app_manage); | |
76d7553f | 1258 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1259 | rcu_thread_offline(); |
1260 | rcu_unregister_thread(); | |
099e26bd DG |
1261 | return NULL; |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Dispatch request from the registration threads to the application | |
1266 | * communication thread. | |
1267 | */ | |
1268 | static void *thread_dispatch_ust_registration(void *data) | |
1269 | { | |
1270 | int ret; | |
1271 | struct cds_wfq_node *node; | |
1272 | struct ust_command *ust_cmd = NULL; | |
1273 | ||
1274 | DBG("[thread] Dispatch UST command started"); | |
1275 | ||
26c9d55e | 1276 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1277 | /* Atomically prepare the queue futex */ |
1278 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1279 | ||
1280 | do { | |
1281 | /* Dequeue command for registration */ | |
1282 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1283 | if (node == NULL) { | |
00a17c97 | 1284 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1285 | /* Continue thread execution */ |
1286 | break; | |
1287 | } | |
1288 | ||
1289 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1290 | ||
2f50c8a3 DG |
1291 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1292 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1293 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1294 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1295 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1296 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1297 | /* |
1298 | * Inform apps thread of the new application registration. This | |
1299 | * call is blocking so we can be assured that the data will be read | |
1300 | * at some point in time or wait to the end of the world :) | |
1301 | */ | |
1302 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1303 | sizeof(struct ust_command)); | |
1304 | if (ret < 0) { | |
76d7553f | 1305 | PERROR("write apps cmd pipe"); |
099e26bd DG |
1306 | if (errno == EBADF) { |
1307 | /* | |
1308 | * We can't inform the application thread to process | |
1309 | * registration. We will exit or else application | |
1310 | * registration will not occur and tracing will never | |
1311 | * start. | |
1312 | */ | |
1313 | goto error; | |
1314 | } | |
1315 | } | |
1316 | free(ust_cmd); | |
1317 | } while (node != NULL); | |
1318 | ||
1319 | /* Futex wait on queue. Blocking call on futex() */ | |
1320 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1321 | } | |
1322 | ||
1323 | error: | |
1324 | DBG("Dispatch thread dying"); | |
1325 | return NULL; | |
1326 | } | |
1327 | ||
1328 | /* | |
1329 | * This thread manage application registration. | |
1330 | */ | |
1331 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1332 | { |
139ac872 | 1333 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1334 | uint32_t revents, nb_fd; |
1335 | struct lttng_poll_event events; | |
099e26bd DG |
1336 | /* |
1337 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1338 | * freed in the manage apps thread. | |
1339 | */ | |
1340 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1341 | |
099e26bd | 1342 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1343 | |
8ac94142 CB |
1344 | testpoint(thread_registration_apps); |
1345 | ||
1d4b027a DG |
1346 | ret = lttcomm_listen_unix_sock(apps_sock); |
1347 | if (ret < 0) { | |
76d7553f | 1348 | goto error_listen; |
1d4b027a DG |
1349 | } |
1350 | ||
5eb91c98 DG |
1351 | /* |
1352 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1353 | * more will be added to this poll set. | |
1354 | */ | |
1355 | ret = create_thread_poll_set(&events, 2); | |
1356 | if (ret < 0) { | |
76d7553f | 1357 | goto error_create_poll; |
5eb91c98 | 1358 | } |
273ea72c | 1359 | |
5eb91c98 DG |
1360 | /* Add the application registration socket */ |
1361 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1362 | if (ret < 0) { | |
76d7553f | 1363 | goto error_poll_add; |
5eb91c98 | 1364 | } |
273ea72c | 1365 | |
1d4b027a | 1366 | /* Notify all applications to register */ |
0fdd1e2c DG |
1367 | ret = notify_ust_apps(1); |
1368 | if (ret < 0) { | |
1369 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1370 | "Execution continues but there might be problem for already\n" |
1371 | "running applications that wishes to register."); | |
0fdd1e2c | 1372 | } |
1d4b027a DG |
1373 | |
1374 | while (1) { | |
1375 | DBG("Accepting application registration"); | |
273ea72c | 1376 | |
5eb91c98 DG |
1377 | nb_fd = LTTNG_POLL_GETNB(&events); |
1378 | ||
273ea72c | 1379 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1380 | restart: |
139ac872 | 1381 | health_poll_update(&health_thread_app_reg); |
5eb91c98 | 1382 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1383 | health_poll_update(&health_thread_app_reg); |
273ea72c | 1384 | if (ret < 0) { |
88f2b785 MD |
1385 | /* |
1386 | * Restart interrupted system call. | |
1387 | */ | |
1388 | if (errno == EINTR) { | |
1389 | goto restart; | |
1390 | } | |
273ea72c DG |
1391 | goto error; |
1392 | } | |
1393 | ||
5eb91c98 | 1394 | for (i = 0; i < nb_fd; i++) { |
139ac872 MD |
1395 | health_code_update(&health_thread_app_reg); |
1396 | ||
5eb91c98 DG |
1397 | /* Fetch once the poll data */ |
1398 | revents = LTTNG_POLL_GETEV(&events, i); | |
1399 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1400 | |
5eb91c98 DG |
1401 | /* Thread quit pipe has been closed. Killing thread. */ |
1402 | ret = check_thread_quit_pipe(pollfd, revents); | |
1403 | if (ret) { | |
139ac872 MD |
1404 | err = 0; |
1405 | goto exit; | |
90014c57 | 1406 | } |
1d4b027a | 1407 | |
5eb91c98 DG |
1408 | /* Event on the registration socket */ |
1409 | if (pollfd == apps_sock) { | |
1410 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1411 | ERR("Register apps socket poll error"); | |
1412 | goto error; | |
1413 | } else if (revents & LPOLLIN) { | |
1414 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1415 | if (sock < 0) { | |
1416 | goto error; | |
1417 | } | |
099e26bd | 1418 | |
b662582b DG |
1419 | /* |
1420 | * Set the CLOEXEC flag. Return code is useless because | |
1421 | * either way, the show must go on. | |
1422 | */ | |
1423 | (void) utils_set_fd_cloexec(sock); | |
1424 | ||
5eb91c98 | 1425 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1426 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1427 | if (ust_cmd == NULL) { |
76d7553f | 1428 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1429 | goto error; |
1430 | } | |
1d4b027a | 1431 | |
5eb91c98 DG |
1432 | /* |
1433 | * Using message-based transmissions to ensure we don't | |
1434 | * have to deal with partially received messages. | |
1435 | */ | |
4063050c MD |
1436 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1437 | if (ret < 0) { | |
1438 | ERR("Exhausted file descriptors allowed for applications."); | |
1439 | free(ust_cmd); | |
1440 | ret = close(sock); | |
1441 | if (ret) { | |
1442 | PERROR("close"); | |
1443 | } | |
1444 | sock = -1; | |
1445 | continue; | |
1446 | } | |
139ac872 | 1447 | health_code_update(&health_thread_app_reg); |
5eb91c98 DG |
1448 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1449 | sizeof(struct ust_register_msg)); | |
1450 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1451 | if (ret < 0) { | |
76d7553f | 1452 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1453 | } else { |
1454 | ERR("Wrong size received on apps register"); | |
1455 | } | |
1456 | free(ust_cmd); | |
76d7553f MD |
1457 | ret = close(sock); |
1458 | if (ret) { | |
1459 | PERROR("close"); | |
1460 | } | |
4063050c | 1461 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1462 | sock = -1; |
5eb91c98 DG |
1463 | continue; |
1464 | } | |
139ac872 | 1465 | health_code_update(&health_thread_app_reg); |
099e26bd | 1466 | |
5eb91c98 | 1467 | ust_cmd->sock = sock; |
34a2494f | 1468 | sock = -1; |
099e26bd | 1469 | |
5eb91c98 DG |
1470 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1471 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1472 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1473 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1474 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1475 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1476 | |
5eb91c98 DG |
1477 | /* |
1478 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1479 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1480 | */ |
1481 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1482 | ||
1483 | /* | |
1484 | * Wake the registration queue futex. Implicit memory | |
1485 | * barrier with the exchange in cds_wfq_enqueue. | |
1486 | */ | |
1487 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1488 | } | |
1489 | } | |
90014c57 | 1490 | } |
1d4b027a DG |
1491 | } |
1492 | ||
139ac872 | 1493 | exit: |
1d4b027a | 1494 | error: |
139ac872 MD |
1495 | if (err) { |
1496 | health_error(&health_thread_app_reg); | |
1497 | ERR("Health error occurred in %s", __func__); | |
1498 | } | |
1499 | health_exit(&health_thread_app_reg); | |
1500 | ||
0fdd1e2c DG |
1501 | /* Notify that the registration thread is gone */ |
1502 | notify_ust_apps(0); | |
1503 | ||
a4b35e07 | 1504 | if (apps_sock >= 0) { |
76d7553f MD |
1505 | ret = close(apps_sock); |
1506 | if (ret) { | |
1507 | PERROR("close"); | |
1508 | } | |
a4b35e07 | 1509 | } |
46c3f085 | 1510 | if (sock >= 0) { |
76d7553f MD |
1511 | ret = close(sock); |
1512 | if (ret) { | |
1513 | PERROR("close"); | |
1514 | } | |
4063050c | 1515 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1516 | } |
273ea72c | 1517 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1518 | |
76d7553f | 1519 | error_poll_add: |
5eb91c98 | 1520 | lttng_poll_clean(&events); |
76d7553f MD |
1521 | error_listen: |
1522 | error_create_poll: | |
1523 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1524 | |
1d4b027a DG |
1525 | return NULL; |
1526 | } | |
1527 | ||
8c0faa1d | 1528 | /* |
3bd1e081 | 1529 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1530 | * exec or it will fails. |
8c0faa1d | 1531 | */ |
3bd1e081 | 1532 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1533 | { |
a23ec3a7 | 1534 | int ret, clock_ret; |
ee0b0061 DG |
1535 | struct timespec timeout; |
1536 | ||
a23ec3a7 DG |
1537 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1538 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1539 | |
a23ec3a7 DG |
1540 | /* Setup pthread condition */ |
1541 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1542 | if (ret != 0) { | |
1543 | errno = ret; | |
1544 | PERROR("pthread_condattr_init consumer data"); | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1550 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1551 | * for a more details and how we noticed it. | |
1552 | */ | |
1553 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1554 | if (ret != 0) { | |
1555 | errno = ret; | |
1556 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1557 | goto error; |
1558 | } | |
8c0faa1d | 1559 | |
a23ec3a7 DG |
1560 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1561 | if (ret != 0) { | |
1562 | errno = ret; | |
1563 | PERROR("pthread_cond_init consumer data"); | |
1564 | goto error; | |
1565 | } | |
1566 | ||
1567 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1568 | consumer_data); | |
8c0faa1d | 1569 | if (ret != 0) { |
3bd1e081 | 1570 | PERROR("pthread_create consumer"); |
ee0b0061 | 1571 | ret = -1; |
8c0faa1d DG |
1572 | goto error; |
1573 | } | |
1574 | ||
a23ec3a7 DG |
1575 | /* We are about to wait on a pthread condition */ |
1576 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1577 | ||
ee0b0061 | 1578 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1579 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1580 | /* | |
1581 | * Set the timeout for the condition timed wait even if the clock gettime | |
1582 | * call fails since we might loop on that call and we want to avoid to | |
1583 | * increment the timeout too many times. | |
1584 | */ | |
1585 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1586 | ||
1587 | /* | |
1588 | * The following loop COULD be skipped in some conditions so this is why we | |
1589 | * set ret to 0 in order to make sure at least one round of the loop is | |
1590 | * done. | |
1591 | */ | |
1592 | ret = 0; | |
1593 | ||
1594 | /* | |
1595 | * Loop until the condition is reached or when a timeout is reached. Note | |
1596 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1597 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1598 | * possible. This loop does not take any chances and works with both of | |
1599 | * them. | |
1600 | */ | |
1601 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1602 | if (clock_ret < 0) { | |
1603 | PERROR("clock_gettime spawn consumer"); | |
1604 | /* Infinite wait for the consumerd thread to be ready */ | |
1605 | ret = pthread_cond_wait(&consumer_data->cond, | |
1606 | &consumer_data->cond_mutex); | |
1607 | } else { | |
1608 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1609 | &consumer_data->cond_mutex, &timeout); | |
1610 | } | |
ee0b0061 | 1611 | } |
8c0faa1d | 1612 | |
a23ec3a7 DG |
1613 | /* Release the pthread condition */ |
1614 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1615 | ||
1616 | if (ret != 0) { | |
1617 | errno = ret; | |
1618 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1619 | /* |
1620 | * Call has timed out so we kill the kconsumerd_thread and return | |
1621 | * an error. | |
1622 | */ | |
a23ec3a7 DG |
1623 | ERR("Condition timed out. The consumer thread was never ready." |
1624 | " Killing it"); | |
3bd1e081 | 1625 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1626 | if (ret < 0) { |
3bd1e081 | 1627 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1628 | } |
1629 | } else { | |
a23ec3a7 | 1630 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1631 | } |
1632 | goto error; | |
1633 | } | |
1634 | ||
3bd1e081 MD |
1635 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1636 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1637 | ERR("Consumerd did not start"); |
3bd1e081 | 1638 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1639 | goto error; |
1640 | } | |
3bd1e081 | 1641 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1642 | |
8c0faa1d DG |
1643 | return 0; |
1644 | ||
1645 | error: | |
1646 | return ret; | |
1647 | } | |
1648 | ||
d9800920 | 1649 | /* |
3bd1e081 | 1650 | * Join consumer thread |
d9800920 | 1651 | */ |
3bd1e081 | 1652 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1653 | { |
1654 | void *status; | |
1655 | int ret; | |
1656 | ||
e8209f6b DG |
1657 | /* Consumer pid must be a real one. */ |
1658 | if (consumer_data->pid > 0) { | |
3bd1e081 | 1659 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1660 | if (ret) { |
3bd1e081 | 1661 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1662 | return ret; |
1663 | } | |
3bd1e081 | 1664 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1665 | } else { |
1666 | return 0; | |
1667 | } | |
1668 | } | |
1669 | ||
8c0faa1d | 1670 | /* |
3bd1e081 | 1671 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1672 | * |
d063d709 | 1673 | * Return pid if successful else -1. |
8c0faa1d | 1674 | */ |
3bd1e081 | 1675 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1676 | { |
1677 | int ret; | |
1678 | pid_t pid; | |
94c55f17 | 1679 | const char *consumer_to_use; |
53086306 | 1680 | const char *verbosity; |
94c55f17 | 1681 | struct stat st; |
8c0faa1d | 1682 | |
3bd1e081 | 1683 | DBG("Spawning consumerd"); |
c49dc785 | 1684 | |
8c0faa1d DG |
1685 | pid = fork(); |
1686 | if (pid == 0) { | |
1687 | /* | |
3bd1e081 | 1688 | * Exec consumerd. |
8c0faa1d | 1689 | */ |
daee5345 | 1690 | if (opt_verbose_consumer) { |
53086306 DG |
1691 | verbosity = "--verbose"; |
1692 | } else { | |
1693 | verbosity = "--quiet"; | |
1694 | } | |
3bd1e081 MD |
1695 | switch (consumer_data->type) { |
1696 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1697 | /* |
c7704d57 DG |
1698 | * Find out which consumerd to execute. We will first try the |
1699 | * 64-bit path, then the sessiond's installation directory, and | |
1700 | * fallback on the 32-bit one, | |
94c55f17 | 1701 | */ |
63a799e8 AM |
1702 | DBG3("Looking for a kernel consumer at these locations:"); |
1703 | DBG3(" 1) %s", consumerd64_bin); | |
1704 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1705 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1706 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1707 | DBG3("Found location #1"); |
94c55f17 | 1708 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1709 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1710 | DBG3("Found location #2"); |
94c55f17 | 1711 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1712 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1713 | DBG3("Found location #3"); |
eb1e0bd4 | 1714 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1715 | } else { |
63a799e8 | 1716 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1717 | break; |
1718 | } | |
1719 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1720 | execl(consumer_to_use, | |
1721 | "lttng-consumerd", verbosity, "-k", | |
1722 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1723 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1724 | NULL); | |
3bd1e081 | 1725 | break; |
7753dea8 MD |
1726 | case LTTNG_CONSUMER64_UST: |
1727 | { | |
b1e0b6b6 | 1728 | char *tmpnew = NULL; |
8f4905da MD |
1729 | |
1730 | if (consumerd64_libdir[0] != '\0') { | |
1731 | char *tmp; | |
1732 | size_t tmplen; | |
1733 | ||
1734 | tmp = getenv("LD_LIBRARY_PATH"); | |
1735 | if (!tmp) { | |
1736 | tmp = ""; | |
1737 | } | |
1738 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1739 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1740 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1741 | if (!tmpnew) { | |
1742 | ret = -ENOMEM; | |
1743 | goto error; | |
1744 | } | |
1745 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1746 | strcat(tmpnew, consumerd64_libdir); | |
1747 | if (tmp[0] != '\0') { | |
1748 | strcat(tmpnew, ":"); | |
1749 | strcat(tmpnew, tmp); | |
1750 | } | |
1751 | ret = putenv(tmpnew); | |
1752 | if (ret) { | |
1753 | ret = -errno; | |
1754 | goto error; | |
1755 | } | |
1756 | } | |
94c55f17 | 1757 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1758 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1759 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1760 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1761 | NULL); | |
8f4905da MD |
1762 | if (consumerd64_libdir[0] != '\0') { |
1763 | free(tmpnew); | |
1764 | } | |
1765 | if (ret) { | |
1766 | goto error; | |
1767 | } | |
3bd1e081 | 1768 | break; |
7753dea8 MD |
1769 | } |
1770 | case LTTNG_CONSUMER32_UST: | |
1771 | { | |
937dde8e | 1772 | char *tmpnew = NULL; |
8f4905da MD |
1773 | |
1774 | if (consumerd32_libdir[0] != '\0') { | |
1775 | char *tmp; | |
1776 | size_t tmplen; | |
1777 | ||
1778 | tmp = getenv("LD_LIBRARY_PATH"); | |
1779 | if (!tmp) { | |
1780 | tmp = ""; | |
1781 | } | |
1782 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1783 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1784 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1785 | if (!tmpnew) { | |
1786 | ret = -ENOMEM; | |
1787 | goto error; | |
1788 | } | |
1789 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1790 | strcat(tmpnew, consumerd32_libdir); | |
1791 | if (tmp[0] != '\0') { | |
1792 | strcat(tmpnew, ":"); | |
1793 | strcat(tmpnew, tmp); | |
1794 | } | |
1795 | ret = putenv(tmpnew); | |
1796 | if (ret) { | |
1797 | ret = -errno; | |
1798 | goto error; | |
1799 | } | |
1800 | } | |
94c55f17 | 1801 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1802 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1803 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1804 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1805 | NULL); | |
8f4905da MD |
1806 | if (consumerd32_libdir[0] != '\0') { |
1807 | free(tmpnew); | |
1808 | } | |
1809 | if (ret) { | |
1810 | goto error; | |
1811 | } | |
7753dea8 MD |
1812 | break; |
1813 | } | |
3bd1e081 | 1814 | default: |
76d7553f | 1815 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1816 | exit(EXIT_FAILURE); |
1817 | } | |
8c0faa1d | 1818 | if (errno != 0) { |
76d7553f | 1819 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1820 | } |
1821 | exit(EXIT_FAILURE); | |
1822 | } else if (pid > 0) { | |
1823 | ret = pid; | |
8c0faa1d | 1824 | } else { |
76d7553f | 1825 | PERROR("start consumer fork"); |
8c0faa1d | 1826 | ret = -errno; |
8c0faa1d | 1827 | } |
8f4905da | 1828 | error: |
8c0faa1d DG |
1829 | return ret; |
1830 | } | |
1831 | ||
693bd40b | 1832 | /* |
3bd1e081 | 1833 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1834 | */ |
3bd1e081 | 1835 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 1836 | { |
edb8b045 DG |
1837 | int ret, err; |
1838 | ||
1839 | /* | |
1840 | * Set the listen() state on the socket since there is a possible race | |
1841 | * between the exec() of the consumer daemon and this call if place in the | |
1842 | * consumer thread. See bug #366 for more details. | |
1843 | */ | |
1844 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
1845 | if (ret < 0) { | |
1846 | goto error; | |
1847 | } | |
693bd40b | 1848 | |
3bd1e081 MD |
1849 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1850 | if (consumer_data->pid != 0) { | |
1851 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1852 | goto end; |
1853 | } | |
693bd40b | 1854 | |
3bd1e081 | 1855 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1856 | if (ret < 0) { |
3bd1e081 MD |
1857 | ERR("Spawning consumerd failed"); |
1858 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1859 | goto error; |
693bd40b | 1860 | } |
c49dc785 | 1861 | |
3bd1e081 MD |
1862 | /* Setting up the consumer_data pid */ |
1863 | consumer_data->pid = ret; | |
48842b30 | 1864 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1865 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1866 | |
3bd1e081 MD |
1867 | DBG2("Spawning consumer control thread"); |
1868 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1869 | if (ret < 0) { |
3bd1e081 | 1870 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1871 | goto error; |
1872 | } | |
1873 | ||
c49dc785 | 1874 | end: |
693bd40b DG |
1875 | return 0; |
1876 | ||
1877 | error: | |
edb8b045 DG |
1878 | /* Cleanup already created socket on error. */ |
1879 | if (consumer_data->err_sock >= 0) { | |
1880 | err = close(consumer_data->err_sock); | |
1881 | if (err < 0) { | |
1882 | PERROR("close consumer data error socket"); | |
1883 | } | |
1884 | } | |
693bd40b DG |
1885 | return ret; |
1886 | } | |
1887 | ||
44a5e5eb | 1888 | /* |
139ac872 MD |
1889 | * Compute health status of each consumer. If one of them is zero (bad |
1890 | * state), we return 0. | |
44a5e5eb DG |
1891 | */ |
1892 | static int check_consumer_health(void) | |
1893 | { | |
1894 | int ret; | |
1895 | ||
139ac872 MD |
1896 | ret = health_check_state(&kconsumer_data.health) && |
1897 | health_check_state(&ustconsumer32_data.health) && | |
44a5e5eb DG |
1898 | health_check_state(&ustconsumer64_data.health); |
1899 | ||
1900 | DBG3("Health consumer check %d", ret); | |
1901 | ||
1902 | return ret; | |
1903 | } | |
1904 | ||
b73401da | 1905 | /* |
096102bd | 1906 | * Setup necessary data for kernel tracer action. |
b73401da | 1907 | */ |
096102bd | 1908 | static int init_kernel_tracer(void) |
b73401da DG |
1909 | { |
1910 | int ret; | |
b73401da | 1911 | |
096102bd DG |
1912 | /* Modprobe lttng kernel modules */ |
1913 | ret = modprobe_lttng_control(); | |
b73401da | 1914 | if (ret < 0) { |
b73401da DG |
1915 | goto error; |
1916 | } | |
1917 | ||
096102bd DG |
1918 | /* Open debugfs lttng */ |
1919 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1920 | if (kernel_tracer_fd < 0) { | |
1921 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
1922 | ret = -1; |
1923 | goto error_open; | |
54d01ffb DG |
1924 | } |
1925 | ||
2f77fc4b DG |
1926 | /* Validate kernel version */ |
1927 | ret = kernel_validate_version(kernel_tracer_fd); | |
1928 | if (ret < 0) { | |
1929 | goto error_version; | |
b551a063 | 1930 | } |
54d01ffb | 1931 | |
2f77fc4b DG |
1932 | ret = modprobe_lttng_data(); |
1933 | if (ret < 0) { | |
1934 | goto error_modules; | |
54d01ffb DG |
1935 | } |
1936 | ||
2f77fc4b DG |
1937 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1938 | return 0; | |
1939 | ||
1940 | error_version: | |
1941 | modprobe_remove_lttng_control(); | |
1942 | ret = close(kernel_tracer_fd); | |
1943 | if (ret) { | |
1944 | PERROR("close"); | |
b551a063 | 1945 | } |
2f77fc4b | 1946 | kernel_tracer_fd = -1; |
f73fabfd | 1947 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1948 | |
2f77fc4b DG |
1949 | error_modules: |
1950 | ret = close(kernel_tracer_fd); | |
1951 | if (ret) { | |
1952 | PERROR("close"); | |
b551a063 | 1953 | } |
54d01ffb | 1954 | |
2f77fc4b DG |
1955 | error_open: |
1956 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1957 | |
1958 | error: | |
2f77fc4b DG |
1959 | WARN("No kernel tracer available"); |
1960 | kernel_tracer_fd = -1; | |
1961 | if (!is_root) { | |
f73fabfd | 1962 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1963 | } else { |
f73fabfd | 1964 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1965 | } |
54d01ffb DG |
1966 | } |
1967 | ||
2f77fc4b | 1968 | |
54d01ffb | 1969 | /* |
2f77fc4b DG |
1970 | * Copy consumer output from the tracing session to the domain session. The |
1971 | * function also applies the right modification on a per domain basis for the | |
1972 | * trace files destination directory. | |
54d01ffb | 1973 | */ |
2f77fc4b | 1974 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
1975 | { |
1976 | int ret; | |
2f77fc4b DG |
1977 | const char *dir_name; |
1978 | struct consumer_output *consumer; | |
1979 | ||
1980 | assert(session); | |
1981 | assert(session->consumer); | |
54d01ffb | 1982 | |
b551a063 DG |
1983 | switch (domain) { |
1984 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 1985 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
1986 | /* |
1987 | * XXX: We should audit the session creation and what this function | |
1988 | * does "extra" in order to avoid a destroy since this function is used | |
1989 | * in the domain session creation (kernel and ust) only. Same for UST | |
1990 | * domain. | |
1991 | */ | |
1992 | if (session->kernel_session->consumer) { | |
1993 | consumer_destroy_output(session->kernel_session->consumer); | |
1994 | } | |
2f77fc4b DG |
1995 | session->kernel_session->consumer = |
1996 | consumer_copy_output(session->consumer); | |
1997 | /* Ease our life a bit for the next part */ | |
1998 | consumer = session->kernel_session->consumer; | |
1999 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2000 | break; |
2001 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2002 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2003 | if (session->ust_session->consumer) { |
2004 | consumer_destroy_output(session->ust_session->consumer); | |
2005 | } | |
2f77fc4b DG |
2006 | session->ust_session->consumer = |
2007 | consumer_copy_output(session->consumer); | |
2008 | /* Ease our life a bit for the next part */ | |
2009 | consumer = session->ust_session->consumer; | |
2010 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2011 | break; |
2012 | default: | |
f73fabfd | 2013 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2014 | goto error; |
2015 | } | |
2016 | ||
2f77fc4b | 2017 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2018 | strncat(consumer->subdir, dir_name, |
2019 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2020 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2021 | ||
f73fabfd | 2022 | ret = LTTNG_OK; |
54d01ffb DG |
2023 | |
2024 | error: | |
2025 | return ret; | |
2026 | } | |
2027 | ||
00e2e675 | 2028 | /* |
2f77fc4b | 2029 | * Create an UST session and add it to the session ust list. |
00e2e675 | 2030 | */ |
2f77fc4b DG |
2031 | static int create_ust_session(struct ltt_session *session, |
2032 | struct lttng_domain *domain) | |
00e2e675 DG |
2033 | { |
2034 | int ret; | |
2f77fc4b | 2035 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2036 | |
a4b92340 | 2037 | assert(session); |
2f77fc4b DG |
2038 | assert(domain); |
2039 | assert(session->consumer); | |
a4b92340 | 2040 | |
2f77fc4b DG |
2041 | switch (domain->type) { |
2042 | case LTTNG_DOMAIN_UST: | |
2043 | break; | |
2044 | default: | |
2045 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2046 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2047 | goto error; |
2048 | } | |
2049 | ||
2f77fc4b DG |
2050 | DBG("Creating UST session"); |
2051 | ||
2052 | lus = trace_ust_create_session(session->path, session->id, domain); | |
2053 | if (lus == NULL) { | |
f73fabfd | 2054 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2055 | goto error; |
2056 | } | |
2057 | ||
2f77fc4b DG |
2058 | lus->uid = session->uid; |
2059 | lus->gid = session->gid; | |
2060 | session->ust_session = lus; | |
00e2e675 | 2061 | |
2f77fc4b DG |
2062 | /* Copy session output to the newly created UST session */ |
2063 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2064 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2065 | goto error; |
2066 | } | |
2067 | ||
f73fabfd | 2068 | return LTTNG_OK; |
00e2e675 DG |
2069 | |
2070 | error: | |
2f77fc4b DG |
2071 | free(lus); |
2072 | session->ust_session = NULL; | |
00e2e675 DG |
2073 | return ret; |
2074 | } | |
2075 | ||
2076 | /* | |
2f77fc4b | 2077 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2078 | */ |
2f77fc4b | 2079 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2080 | { |
2081 | int ret; | |
a4b92340 | 2082 | |
2f77fc4b | 2083 | DBG("Creating kernel session"); |
00e2e675 | 2084 | |
2f77fc4b DG |
2085 | ret = kernel_create_session(session, kernel_tracer_fd); |
2086 | if (ret < 0) { | |
f73fabfd | 2087 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2088 | goto error; |
2089 | } | |
2090 | ||
2f77fc4b DG |
2091 | /* Code flow safety */ |
2092 | assert(session->kernel_session); | |
2093 | ||
2094 | /* Copy session output to the newly created Kernel session */ | |
2095 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2096 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2097 | goto error; |
2098 | } | |
2099 | ||
2f77fc4b DG |
2100 | /* Create directory(ies) on local filesystem. */ |
2101 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2102 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2103 | ret = run_as_mkdir_recursive( | |
2104 | session->kernel_session->consumer->dst.trace_path, | |
2105 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2106 | if (ret < 0) { | |
2107 | if (ret != -EEXIST) { | |
2108 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2109 | goto error; |
2110 | } | |
00e2e675 | 2111 | } |
2f77fc4b | 2112 | } |
00e2e675 | 2113 | |
2f77fc4b DG |
2114 | session->kernel_session->uid = session->uid; |
2115 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2116 | |
f73fabfd | 2117 | return LTTNG_OK; |
00e2e675 | 2118 | |
2f77fc4b DG |
2119 | error: |
2120 | trace_kernel_destroy_session(session->kernel_session); | |
2121 | session->kernel_session = NULL; | |
2122 | return ret; | |
2123 | } | |
00e2e675 | 2124 | |
2f77fc4b DG |
2125 | /* |
2126 | * Count number of session permitted by uid/gid. | |
2127 | */ | |
2128 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2129 | { | |
2130 | unsigned int i = 0; | |
2131 | struct ltt_session *session; | |
07424f16 | 2132 | |
2f77fc4b DG |
2133 | DBG("Counting number of available session for UID %d GID %d", |
2134 | uid, gid); | |
2135 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2136 | /* |
2f77fc4b | 2137 | * Only list the sessions the user can control. |
00e2e675 | 2138 | */ |
2f77fc4b DG |
2139 | if (!session_access_ok(session, uid, gid)) { |
2140 | continue; | |
2141 | } | |
2142 | i++; | |
a4b92340 | 2143 | } |
2f77fc4b | 2144 | return i; |
00e2e675 DG |
2145 | } |
2146 | ||
54d01ffb DG |
2147 | /* |
2148 | * Process the command requested by the lttng client within the command | |
2149 | * context structure. This function make sure that the return structure (llm) | |
2150 | * is set and ready for transmission before returning. | |
2151 | * | |
2152 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2153 | * |
2154 | * "sock" is only used for special-case var. len data. | |
54d01ffb | 2155 | */ |
53a80697 MD |
2156 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2157 | int *sock_error) | |
54d01ffb | 2158 | { |
f73fabfd | 2159 | int ret = LTTNG_OK; |
44d3bd01 | 2160 | int need_tracing_session = 1; |
2e09ba09 | 2161 | int need_domain; |
54d01ffb DG |
2162 | |
2163 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2164 | ||
53a80697 MD |
2165 | *sock_error = 0; |
2166 | ||
2e09ba09 MD |
2167 | switch (cmd_ctx->lsm->cmd_type) { |
2168 | case LTTNG_CREATE_SESSION: | |
2169 | case LTTNG_DESTROY_SESSION: | |
2170 | case LTTNG_LIST_SESSIONS: | |
2171 | case LTTNG_LIST_DOMAINS: | |
2172 | case LTTNG_START_TRACE: | |
2173 | case LTTNG_STOP_TRACE: | |
6d805429 | 2174 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2175 | need_domain = 0; |
3aace903 | 2176 | break; |
2e09ba09 MD |
2177 | default: |
2178 | need_domain = 1; | |
2179 | } | |
2180 | ||
2181 | if (opt_no_kernel && need_domain | |
2182 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2183 | if (!is_root) { |
f73fabfd | 2184 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2185 | } else { |
f73fabfd | 2186 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2187 | } |
4fba7219 DG |
2188 | goto error; |
2189 | } | |
2190 | ||
8d3113b2 DG |
2191 | /* Deny register consumer if we already have a spawned consumer. */ |
2192 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2193 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2194 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2195 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2196 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2197 | goto error; |
2198 | } | |
2199 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2200 | } | |
2201 | ||
54d01ffb DG |
2202 | /* |
2203 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2204 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2205 | * command. |
2206 | */ | |
2207 | switch(cmd_ctx->lsm->cmd_type) { | |
2208 | case LTTNG_LIST_SESSIONS: | |
2209 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2210 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2211 | case LTTNG_LIST_DOMAINS: |
2212 | case LTTNG_LIST_CHANNELS: | |
2213 | case LTTNG_LIST_EVENTS: | |
2214 | break; | |
2215 | default: | |
2216 | /* Setup lttng message with no payload */ | |
2217 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2218 | if (ret < 0) { | |
2219 | /* This label does not try to unlock the session */ | |
2220 | goto init_setup_error; | |
2221 | } | |
2222 | } | |
2223 | ||
2224 | /* Commands that DO NOT need a session. */ | |
2225 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2226 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2227 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2228 | case LTTNG_LIST_SESSIONS: |
2229 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2230 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2231 | need_tracing_session = 0; |
54d01ffb DG |
2232 | break; |
2233 | default: | |
2234 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2235 | /* |
2236 | * We keep the session list lock across _all_ commands | |
2237 | * for now, because the per-session lock does not | |
2238 | * handle teardown properly. | |
2239 | */ | |
74babd95 | 2240 | session_lock_list(); |
54d01ffb DG |
2241 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2242 | if (cmd_ctx->session == NULL) { | |
2243 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2244 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2245 | } else { |
2246 | /* If no session name specified */ | |
f73fabfd | 2247 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2248 | } |
2249 | goto error; | |
2250 | } else { | |
2251 | /* Acquire lock for the session */ | |
2252 | session_lock(cmd_ctx->session); | |
2253 | } | |
2254 | break; | |
2255 | } | |
b389abbe | 2256 | |
2e09ba09 MD |
2257 | if (!need_domain) { |
2258 | goto skip_domain; | |
2259 | } | |
a4b92340 | 2260 | |
54d01ffb DG |
2261 | /* |
2262 | * Check domain type for specific "pre-action". | |
2263 | */ | |
2264 | switch (cmd_ctx->lsm->domain.type) { | |
2265 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2266 | if (!is_root) { |
f73fabfd | 2267 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2268 | goto error; |
2269 | } | |
2270 | ||
54d01ffb | 2271 | /* Kernel tracer check */ |
a4b35e07 | 2272 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2273 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2274 | ret = init_kernel_tracer(); |
2275 | if (ret != 0) { | |
54d01ffb DG |
2276 | goto error; |
2277 | } | |
2278 | } | |
5eb91c98 | 2279 | |
5c827ce0 DG |
2280 | /* Consumer is in an ERROR state. Report back to client */ |
2281 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2282 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2283 | goto error; |
2284 | } | |
2285 | ||
54d01ffb | 2286 | /* Need a session for kernel command */ |
44d3bd01 | 2287 | if (need_tracing_session) { |
54d01ffb | 2288 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2289 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2290 | if (ret < 0) { |
f73fabfd | 2291 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2292 | goto error; |
2293 | } | |
b389abbe | 2294 | } |
7d29a247 | 2295 | |
54d01ffb | 2296 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2297 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2298 | if (kconsumer_data.pid == 0 && | |
a4b92340 DG |
2299 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2300 | cmd_ctx->session->start_consumer) { | |
3bd1e081 MD |
2301 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2302 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2303 | if (ret < 0) { |
f73fabfd | 2304 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2305 | goto error; |
950131af | 2306 | } |
5c827ce0 | 2307 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2308 | } else { |
2309 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2310 | } |
173af62f | 2311 | |
a4b92340 DG |
2312 | /* |
2313 | * The consumer was just spawned so we need to add the socket to | |
2314 | * the consumer output of the session if exist. | |
2315 | */ | |
2316 | ret = consumer_create_socket(&kconsumer_data, | |
2317 | cmd_ctx->session->kernel_session->consumer); | |
2318 | if (ret < 0) { | |
2319 | goto error; | |
173af62f | 2320 | } |
0d0c377a | 2321 | } |
5c827ce0 | 2322 | |
54d01ffb | 2323 | break; |
2bdd86d4 | 2324 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2325 | { |
5c827ce0 DG |
2326 | /* Consumer is in an ERROR state. Report back to client */ |
2327 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2328 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2329 | goto error; |
2330 | } | |
2331 | ||
44d3bd01 | 2332 | if (need_tracing_session) { |
a4b92340 | 2333 | /* Create UST session if none exist. */ |
f6a9efaa | 2334 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2335 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2336 | &cmd_ctx->lsm->domain); |
f73fabfd | 2337 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2338 | goto error; |
2339 | } | |
2340 | } | |
00e2e675 | 2341 | |
7753dea8 MD |
2342 | /* Start the UST consumer daemons */ |
2343 | /* 64-bit */ | |
2344 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2345 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2346 | ustconsumer64_data.pid == 0 && |
a4b92340 DG |
2347 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2348 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2349 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2350 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2351 | if (ret < 0) { |
f73fabfd | 2352 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2353 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2354 | goto error; |
2355 | } | |
48842b30 | 2356 | |
173af62f | 2357 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2358 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2359 | } else { |
7753dea8 MD |
2360 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2361 | } | |
173af62f DG |
2362 | |
2363 | /* | |
2364 | * Setup socket for consumer 64 bit. No need for atomic access | |
2365 | * since it was set above and can ONLY be set in this thread. | |
2366 | */ | |
a4b92340 DG |
2367 | ret = consumer_create_socket(&ustconsumer64_data, |
2368 | cmd_ctx->session->ust_session->consumer); | |
2369 | if (ret < 0) { | |
2370 | goto error; | |
173af62f DG |
2371 | } |
2372 | ||
7753dea8 | 2373 | /* 32-bit */ |
fc7a59ce | 2374 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2375 | ustconsumer32_data.pid == 0 && |
a4b92340 DG |
2376 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2377 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2378 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2379 | ret = start_consumerd(&ustconsumer32_data); | |
2380 | if (ret < 0) { | |
f73fabfd | 2381 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2382 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2383 | goto error; |
2384 | } | |
5c827ce0 | 2385 | |
173af62f | 2386 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2387 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2388 | } else { |
2389 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2390 | } |
173af62f DG |
2391 | |
2392 | /* | |
2393 | * Setup socket for consumer 64 bit. No need for atomic access | |
2394 | * since it was set above and can ONLY be set in this thread. | |
2395 | */ | |
a4b92340 DG |
2396 | ret = consumer_create_socket(&ustconsumer32_data, |
2397 | cmd_ctx->session->ust_session->consumer); | |
2398 | if (ret < 0) { | |
2399 | goto error; | |
173af62f | 2400 | } |
44d3bd01 DG |
2401 | } |
2402 | break; | |
48842b30 | 2403 | } |
54d01ffb | 2404 | default: |
54d01ffb DG |
2405 | break; |
2406 | } | |
2e09ba09 | 2407 | skip_domain: |
33a2b854 | 2408 | |
5c827ce0 DG |
2409 | /* Validate consumer daemon state when start/stop trace command */ |
2410 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2411 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2412 | switch (cmd_ctx->lsm->domain.type) { | |
2413 | case LTTNG_DOMAIN_UST: | |
2414 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2415 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2416 | goto error; |
2417 | } | |
2418 | break; | |
2419 | case LTTNG_DOMAIN_KERNEL: | |
2420 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2421 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2422 | goto error; |
2423 | } | |
2424 | break; | |
2425 | } | |
2426 | } | |
2427 | ||
8e0af1b4 MD |
2428 | /* |
2429 | * Check that the UID or GID match that of the tracing session. | |
2430 | * The root user can interact with all sessions. | |
2431 | */ | |
2432 | if (need_tracing_session) { | |
2433 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2434 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2435 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2436 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2437 | goto error; |
2438 | } | |
2439 | } | |
2440 | ||
54d01ffb DG |
2441 | /* Process by command type */ |
2442 | switch (cmd_ctx->lsm->cmd_type) { | |
2443 | case LTTNG_ADD_CONTEXT: | |
2444 | { | |
2445 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2446 | cmd_ctx->lsm->u.context.channel_name, | |
2447 | cmd_ctx->lsm->u.context.event_name, | |
979e618e | 2448 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2449 | break; |
2450 | } | |
2451 | case LTTNG_DISABLE_CHANNEL: | |
2452 | { | |
2453 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2454 | cmd_ctx->lsm->u.disable.channel_name); | |
2455 | break; | |
2456 | } | |
2457 | case LTTNG_DISABLE_EVENT: | |
2458 | { | |
2459 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2460 | cmd_ctx->lsm->u.disable.channel_name, | |
2461 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2462 | break; |
2463 | } | |
54d01ffb DG |
2464 | case LTTNG_DISABLE_ALL_EVENT: |
2465 | { | |
2bdd86d4 | 2466 | DBG("Disabling all events"); |
54d01ffb DG |
2467 | |
2468 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2469 | cmd_ctx->lsm->u.disable.channel_name); | |
2470 | break; | |
2471 | } | |
00e2e675 DG |
2472 | case LTTNG_DISABLE_CONSUMER: |
2473 | { | |
2474 | ret = cmd_disable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); | |
2475 | break; | |
2476 | } | |
54d01ffb DG |
2477 | case LTTNG_ENABLE_CHANNEL: |
2478 | { | |
aea829b3 | 2479 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2480 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2481 | break; |
2482 | } | |
00e2e675 DG |
2483 | case LTTNG_ENABLE_CONSUMER: |
2484 | { | |
a4b92340 DG |
2485 | /* |
2486 | * XXX: 0 means that this URI should be applied on the session. Should | |
2487 | * be a DOMAIN enuam. | |
2488 | */ | |
00e2e675 | 2489 | ret = cmd_enable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); |
f73fabfd | 2490 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2491 | goto error; |
2492 | } | |
2493 | ||
2494 | if (cmd_ctx->lsm->domain.type == 0) { | |
2495 | /* Add the URI for the UST session if a consumer is present. */ | |
2496 | if (cmd_ctx->session->ust_session && | |
2497 | cmd_ctx->session->ust_session->consumer) { | |
2498 | ret = cmd_enable_consumer(LTTNG_DOMAIN_UST, cmd_ctx->session); | |
2499 | } else if (cmd_ctx->session->kernel_session && | |
2500 | cmd_ctx->session->kernel_session->consumer) { | |
2501 | ret = cmd_enable_consumer(LTTNG_DOMAIN_KERNEL, | |
2502 | cmd_ctx->session); | |
2503 | } | |
2504 | } | |
00e2e675 DG |
2505 | break; |
2506 | } | |
54d01ffb DG |
2507 | case LTTNG_ENABLE_EVENT: |
2508 | { | |
2509 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2510 | cmd_ctx->lsm->u.enable.channel_name, | |
2f77fc4b | 2511 | &cmd_ctx->lsm->u.enable.event, kernel_poll_pipe[1]); |
54d01ffb DG |
2512 | break; |
2513 | } | |
2514 | case LTTNG_ENABLE_ALL_EVENT: | |
2515 | { | |
2bdd86d4 | 2516 | DBG("Enabling all events"); |
54d01ffb DG |
2517 | |
2518 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 | 2519 | cmd_ctx->lsm->u.enable.channel_name, |
2f77fc4b | 2520 | cmd_ctx->lsm->u.enable.event.type, kernel_poll_pipe[1]); |
54d01ffb DG |
2521 | break; |
2522 | } | |
052da939 | 2523 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2524 | { |
9f19cc17 | 2525 | struct lttng_event *events; |
54d01ffb | 2526 | ssize_t nb_events; |
052da939 | 2527 | |
54d01ffb DG |
2528 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2529 | if (nb_events < 0) { | |
f73fabfd | 2530 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2531 | ret = -nb_events; |
2532 | goto error; | |
2ef84c95 DG |
2533 | } |
2534 | ||
2535 | /* | |
2536 | * Setup lttng message with payload size set to the event list size in | |
2537 | * bytes and then copy list into the llm payload. | |
2538 | */ | |
052da939 | 2539 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2540 | if (ret < 0) { |
052da939 | 2541 | free(events); |
2ef84c95 DG |
2542 | goto setup_error; |
2543 | } | |
2544 | ||
2545 | /* Copy event list into message payload */ | |
9f19cc17 | 2546 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2547 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2548 | |
9f19cc17 | 2549 | free(events); |
2ef84c95 | 2550 | |
f73fabfd | 2551 | ret = LTTNG_OK; |
2ef84c95 DG |
2552 | break; |
2553 | } | |
f37d259d MD |
2554 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2555 | { | |
2556 | struct lttng_event_field *fields; | |
2557 | ssize_t nb_fields; | |
2558 | ||
a4b92340 DG |
2559 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2560 | &fields); | |
f37d259d | 2561 | if (nb_fields < 0) { |
f73fabfd | 2562 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2563 | ret = -nb_fields; |
2564 | goto error; | |
2565 | } | |
2566 | ||
2567 | /* | |
2568 | * Setup lttng message with payload size set to the event list size in | |
2569 | * bytes and then copy list into the llm payload. | |
2570 | */ | |
a4b92340 DG |
2571 | ret = setup_lttng_msg(cmd_ctx, |
2572 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2573 | if (ret < 0) { |
2574 | free(fields); | |
2575 | goto setup_error; | |
2576 | } | |
2577 | ||
2578 | /* Copy event list into message payload */ | |
2579 | memcpy(cmd_ctx->llm->payload, fields, | |
2580 | sizeof(struct lttng_event_field) * nb_fields); | |
2581 | ||
2582 | free(fields); | |
2583 | ||
f73fabfd | 2584 | ret = LTTNG_OK; |
f37d259d MD |
2585 | break; |
2586 | } | |
00e2e675 DG |
2587 | case LTTNG_SET_CONSUMER_URI: |
2588 | { | |
a4b92340 DG |
2589 | size_t nb_uri, len; |
2590 | struct lttng_uri *uris; | |
2591 | ||
2592 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2593 | len = nb_uri * sizeof(struct lttng_uri); | |
2594 | ||
2595 | if (nb_uri == 0) { | |
f73fabfd | 2596 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2597 | goto error; |
2598 | } | |
2599 | ||
2600 | uris = zmalloc(len); | |
2601 | if (uris == NULL) { | |
f73fabfd | 2602 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2603 | goto error; |
2604 | } | |
2605 | ||
2606 | /* Receive variable len data */ | |
77c7c900 | 2607 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2608 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2609 | if (ret <= 0) { | |
2610 | DBG("No URIs received from client... continuing"); | |
2611 | *sock_error = 1; | |
f73fabfd | 2612 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2613 | free(uris); |
a4b92340 DG |
2614 | goto error; |
2615 | } | |
2616 | ||
00e2e675 | 2617 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2618 | nb_uri, uris); |
f73fabfd | 2619 | if (ret != LTTNG_OK) { |
b1d41407 | 2620 | free(uris); |
a4b92340 DG |
2621 | goto error; |
2622 | } | |
2623 | ||
2624 | /* | |
2625 | * XXX: 0 means that this URI should be applied on the session. Should | |
2626 | * be a DOMAIN enuam. | |
2627 | */ | |
2628 | if (cmd_ctx->lsm->domain.type == 0) { | |
2629 | /* Add the URI for the UST session if a consumer is present. */ | |
2630 | if (cmd_ctx->session->ust_session && | |
2631 | cmd_ctx->session->ust_session->consumer) { | |
2632 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2633 | nb_uri, uris); | |
2634 | } else if (cmd_ctx->session->kernel_session && | |
2635 | cmd_ctx->session->kernel_session->consumer) { | |
2636 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2637 | cmd_ctx->session, nb_uri, uris); | |
2638 | } | |
2639 | } | |
2640 | ||
b1d41407 DG |
2641 | free(uris); |
2642 | ||
00e2e675 DG |
2643 | break; |
2644 | } | |
f3ed775e | 2645 | case LTTNG_START_TRACE: |
8c0faa1d | 2646 | { |
54d01ffb | 2647 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2648 | break; |
2649 | } | |
f3ed775e | 2650 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2651 | { |
54d01ffb | 2652 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2653 | break; |
2654 | } | |
5e16da05 MD |
2655 | case LTTNG_CREATE_SESSION: |
2656 | { | |
a4b92340 DG |
2657 | size_t nb_uri, len; |
2658 | struct lttng_uri *uris = NULL; | |
2659 | ||
2660 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2661 | len = nb_uri * sizeof(struct lttng_uri); | |
2662 | ||
2663 | if (nb_uri > 0) { | |
2664 | uris = zmalloc(len); | |
2665 | if (uris == NULL) { | |
f73fabfd | 2666 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2667 | goto error; |
2668 | } | |
2669 | ||
2670 | /* Receive variable len data */ | |
77c7c900 | 2671 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2672 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2673 | if (ret <= 0) { | |
2674 | DBG("No URIs received from client... continuing"); | |
2675 | *sock_error = 1; | |
f73fabfd | 2676 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2677 | free(uris); |
a4b92340 DG |
2678 | goto error; |
2679 | } | |
2680 | ||
2681 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2682 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2683 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2684 | free(uris); |
a4b92340 DG |
2685 | goto error; |
2686 | } | |
2687 | } | |
2688 | ||
2689 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2690 | &cmd_ctx->creds); | |
2691 | ||
b1d41407 DG |
2692 | free(uris); |
2693 | ||
00e2e675 DG |
2694 | break; |
2695 | } | |
5e16da05 MD |
2696 | case LTTNG_DESTROY_SESSION: |
2697 | { | |
2f77fc4b | 2698 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2699 | |
2700 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2701 | cmd_ctx->session = NULL; |
5461b305 | 2702 | break; |
5e16da05 | 2703 | } |
9f19cc17 | 2704 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2705 | { |
54d01ffb DG |
2706 | ssize_t nb_dom; |
2707 | struct lttng_domain *domains; | |
5461b305 | 2708 | |
54d01ffb DG |
2709 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2710 | if (nb_dom < 0) { | |
f73fabfd | 2711 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2712 | ret = -nb_dom; |
2713 | goto error; | |
ce3d728c | 2714 | } |
520ff687 | 2715 | |
54d01ffb | 2716 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
2717 | if (ret < 0) { |
2718 | goto setup_error; | |
520ff687 | 2719 | } |
57167058 | 2720 | |
54d01ffb DG |
2721 | /* Copy event list into message payload */ |
2722 | memcpy(cmd_ctx->llm->payload, domains, | |
2723 | nb_dom * sizeof(struct lttng_domain)); | |
2724 | ||
2725 | free(domains); | |
5e16da05 | 2726 | |
f73fabfd | 2727 | ret = LTTNG_OK; |
5e16da05 MD |
2728 | break; |
2729 | } | |
9f19cc17 | 2730 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2731 | { |
6775595e | 2732 | int nb_chan; |
54d01ffb DG |
2733 | struct lttng_channel *channels; |
2734 | ||
b551a063 DG |
2735 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2736 | cmd_ctx->session, &channels); | |
54d01ffb | 2737 | if (nb_chan < 0) { |
f73fabfd | 2738 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2739 | ret = -nb_chan; |
2740 | goto error; | |
5461b305 | 2741 | } |
ca95a216 | 2742 | |
54d01ffb | 2743 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
2744 | if (ret < 0) { |
2745 | goto setup_error; | |
2746 | } | |
9f19cc17 | 2747 | |
54d01ffb DG |
2748 | /* Copy event list into message payload */ |
2749 | memcpy(cmd_ctx->llm->payload, channels, | |
2750 | nb_chan * sizeof(struct lttng_channel)); | |
2751 | ||
2752 | free(channels); | |
9f19cc17 | 2753 | |
f73fabfd | 2754 | ret = LTTNG_OK; |
5461b305 | 2755 | break; |
5e16da05 | 2756 | } |
9f19cc17 | 2757 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2758 | { |
b551a063 | 2759 | ssize_t nb_event; |
684d34d2 | 2760 | struct lttng_event *events = NULL; |
9f19cc17 | 2761 | |
b551a063 | 2762 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2763 | cmd_ctx->lsm->u.list.channel_name, &events); |
2764 | if (nb_event < 0) { | |
f73fabfd | 2765 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2766 | ret = -nb_event; |
2767 | goto error; | |
5461b305 | 2768 | } |
ca95a216 | 2769 | |
54d01ffb | 2770 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
2771 | if (ret < 0) { |
2772 | goto setup_error; | |
2773 | } | |
9f19cc17 | 2774 | |
54d01ffb DG |
2775 | /* Copy event list into message payload */ |
2776 | memcpy(cmd_ctx->llm->payload, events, | |
2777 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2778 | |
54d01ffb | 2779 | free(events); |
9f19cc17 | 2780 | |
f73fabfd | 2781 | ret = LTTNG_OK; |
5461b305 | 2782 | break; |
5e16da05 MD |
2783 | } |
2784 | case LTTNG_LIST_SESSIONS: | |
2785 | { | |
8e0af1b4 | 2786 | unsigned int nr_sessions; |
5461b305 | 2787 | |
8e0af1b4 | 2788 | session_lock_list(); |
730389d9 DG |
2789 | nr_sessions = lttng_sessions_count( |
2790 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
2791 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 2792 | |
8e0af1b4 | 2793 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 2794 | if (ret < 0) { |
54d01ffb | 2795 | session_unlock_list(); |
5461b305 | 2796 | goto setup_error; |
e065084a | 2797 | } |
5e16da05 | 2798 | |
6c9cc2ab | 2799 | /* Filled the session array */ |
2f77fc4b | 2800 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
2801 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2802 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 2803 | |
54d01ffb | 2804 | session_unlock_list(); |
5e16da05 | 2805 | |
f73fabfd | 2806 | ret = LTTNG_OK; |
5e16da05 MD |
2807 | break; |
2808 | } | |
d0254c7c MD |
2809 | case LTTNG_CALIBRATE: |
2810 | { | |
54d01ffb DG |
2811 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
2812 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
2813 | break; |
2814 | } | |
d9800920 DG |
2815 | case LTTNG_REGISTER_CONSUMER: |
2816 | { | |
2f77fc4b DG |
2817 | struct consumer_data *cdata; |
2818 | ||
2819 | switch (cmd_ctx->lsm->domain.type) { | |
2820 | case LTTNG_DOMAIN_KERNEL: | |
2821 | cdata = &kconsumer_data; | |
2822 | break; | |
2823 | default: | |
f73fabfd | 2824 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2825 | goto error; |
2826 | } | |
2827 | ||
54d01ffb | 2828 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2829 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
2830 | break; |
2831 | } | |
53a80697 MD |
2832 | case LTTNG_SET_FILTER: |
2833 | { | |
2834 | struct lttng_filter_bytecode *bytecode; | |
2835 | ||
d93c4f1f | 2836 | if (cmd_ctx->lsm->u.filter.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 2837 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2838 | goto error; |
2839 | } | |
2840 | bytecode = zmalloc(cmd_ctx->lsm->u.filter.bytecode_len); | |
2841 | if (!bytecode) { | |
f73fabfd | 2842 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
2843 | goto error; |
2844 | } | |
2845 | /* Receive var. len. data */ | |
2846 | DBG("Receiving var len data from client ..."); | |
2847 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
2848 | cmd_ctx->lsm->u.filter.bytecode_len); | |
2849 | if (ret <= 0) { | |
2850 | DBG("Nothing recv() from client var len data... continuing"); | |
2851 | *sock_error = 1; | |
f73fabfd | 2852 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2853 | goto error; |
2854 | } | |
2855 | ||
2856 | if (bytecode->len + sizeof(*bytecode) | |
2857 | != cmd_ctx->lsm->u.filter.bytecode_len) { | |
2858 | free(bytecode); | |
f73fabfd | 2859 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2860 | goto error; |
2861 | } | |
2862 | ||
2863 | ret = cmd_set_filter(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2864 | cmd_ctx->lsm->u.filter.channel_name, | |
2865 | cmd_ctx->lsm->u.filter.event_name, | |
2866 | bytecode); | |
2867 | break; | |
2868 | } | |
6d805429 | 2869 | case LTTNG_DATA_PENDING: |
806e2684 | 2870 | { |
6d805429 | 2871 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
2872 | break; |
2873 | } | |
5e16da05 | 2874 | default: |
f73fabfd | 2875 | ret = LTTNG_ERR_UND; |
5461b305 | 2876 | break; |
fac6795d DG |
2877 | } |
2878 | ||
5461b305 | 2879 | error: |
5461b305 DG |
2880 | if (cmd_ctx->llm == NULL) { |
2881 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 2882 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
2883 | goto setup_error; |
2884 | } | |
2885 | } | |
54d01ffb | 2886 | /* Set return code */ |
5461b305 | 2887 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 2888 | setup_error: |
b5541356 | 2889 | if (cmd_ctx->session) { |
54d01ffb | 2890 | session_unlock(cmd_ctx->session); |
b5541356 | 2891 | } |
256a5576 MD |
2892 | if (need_tracing_session) { |
2893 | session_unlock_list(); | |
2894 | } | |
54d01ffb | 2895 | init_setup_error: |
8028d920 | 2896 | return ret; |
fac6795d DG |
2897 | } |
2898 | ||
44a5e5eb DG |
2899 | /* |
2900 | * Thread managing health check socket. | |
2901 | */ | |
2902 | static void *thread_manage_health(void *data) | |
2903 | { | |
eb4a2943 | 2904 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
2905 | uint32_t revents, nb_fd; |
2906 | struct lttng_poll_event events; | |
2907 | struct lttcomm_health_msg msg; | |
2908 | struct lttcomm_health_data reply; | |
2909 | ||
2910 | DBG("[thread] Manage health check started"); | |
2911 | ||
2912 | rcu_register_thread(); | |
2913 | ||
2914 | /* Create unix socket */ | |
2915 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
2916 | if (sock < 0) { | |
2917 | ERR("Unable to create health check Unix socket"); | |
2918 | ret = -1; | |
2919 | goto error; | |
2920 | } | |
2921 | ||
b662582b DG |
2922 | /* |
2923 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2924 | * show must go on. | |
2925 | */ | |
2926 | (void) utils_set_fd_cloexec(sock); | |
2927 | ||
44a5e5eb DG |
2928 | ret = lttcomm_listen_unix_sock(sock); |
2929 | if (ret < 0) { | |
2930 | goto error; | |
2931 | } | |
2932 | ||
2933 | /* | |
2934 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
2935 | * more will be added to this poll set. | |
2936 | */ | |
2937 | ret = create_thread_poll_set(&events, 2); | |
2938 | if (ret < 0) { | |
2939 | goto error; | |
2940 | } | |
2941 | ||
2942 | /* Add the application registration socket */ | |
2943 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
2944 | if (ret < 0) { | |
2945 | goto error; | |
2946 | } | |
2947 | ||
2948 | while (1) { | |
2949 | DBG("Health check ready"); | |
2950 | ||
2951 | nb_fd = LTTNG_POLL_GETNB(&events); | |
2952 | ||
2953 | /* Inifinite blocking call, waiting for transmission */ | |
2954 | restart: | |
2955 | ret = lttng_poll_wait(&events, -1); | |
2956 | if (ret < 0) { | |
2957 | /* | |
2958 | * Restart interrupted system call. | |
2959 | */ | |
2960 | if (errno == EINTR) { | |
2961 | goto restart; | |
2962 | } | |
2963 | goto error; | |
2964 | } | |
2965 | ||
2966 | for (i = 0; i < nb_fd; i++) { | |
2967 | /* Fetch once the poll data */ | |
2968 | revents = LTTNG_POLL_GETEV(&events, i); | |
2969 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2970 | ||
2971 | /* Thread quit pipe has been closed. Killing thread. */ | |
2972 | ret = check_thread_quit_pipe(pollfd, revents); | |
2973 | if (ret) { | |
139ac872 MD |
2974 | err = 0; |
2975 | goto exit; | |
44a5e5eb DG |
2976 | } |
2977 | ||
2978 | /* Event on the registration socket */ | |
2979 | if (pollfd == sock) { | |
2980 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2981 | ERR("Health socket poll error"); | |
2982 | goto error; | |
2983 | } | |
2984 | } | |
2985 | } | |
2986 | ||
2987 | new_sock = lttcomm_accept_unix_sock(sock); | |
2988 | if (new_sock < 0) { | |
2989 | goto error; | |
2990 | } | |
2991 | ||
b662582b DG |
2992 | /* |
2993 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2994 | * show must go on. | |
2995 | */ | |
2996 | (void) utils_set_fd_cloexec(new_sock); | |
2997 | ||
44a5e5eb DG |
2998 | DBG("Receiving data from client for health..."); |
2999 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3000 | if (ret <= 0) { | |
3001 | DBG("Nothing recv() from client... continuing"); | |
3002 | ret = close(new_sock); | |
3003 | if (ret) { | |
3004 | PERROR("close"); | |
3005 | } | |
3006 | new_sock = -1; | |
3007 | continue; | |
3008 | } | |
3009 | ||
3010 | rcu_thread_online(); | |
3011 | ||
3012 | switch (msg.component) { | |
3013 | case LTTNG_HEALTH_CMD: | |
3014 | reply.ret_code = health_check_state(&health_thread_cmd); | |
3015 | break; | |
139ac872 MD |
3016 | case LTTNG_HEALTH_APP_MANAGE: |
3017 | reply.ret_code = health_check_state(&health_thread_app_manage); | |
3018 | break; | |
44a5e5eb DG |
3019 | case LTTNG_HEALTH_APP_REG: |
3020 | reply.ret_code = health_check_state(&health_thread_app_reg); | |
3021 | break; | |
3022 | case LTTNG_HEALTH_KERNEL: | |
3023 | reply.ret_code = health_check_state(&health_thread_kernel); | |
3024 | break; | |
3025 | case LTTNG_HEALTH_CONSUMER: | |
3026 | reply.ret_code = check_consumer_health(); | |
3027 | break; | |
3028 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 3029 | reply.ret_code = |
139ac872 MD |
3030 | health_check_state(&health_thread_app_manage) && |
3031 | health_check_state(&health_thread_app_reg) && | |
3032 | health_check_state(&health_thread_cmd) && | |
3033 | health_check_state(&health_thread_kernel) && | |
3034 | check_consumer_health(); | |
44a5e5eb DG |
3035 | break; |
3036 | default: | |
f73fabfd | 3037 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3038 | break; |
3039 | } | |
3040 | ||
3041 | /* | |
3042 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3043 | * the client where in the sessiond it is the opposite. Again, this is | |
3044 | * just to make things easier for us poor developer which enjoy a lot | |
3045 | * lazyness. | |
3046 | */ | |
3047 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3048 | reply.ret_code = !reply.ret_code; | |
3049 | } | |
3050 | ||
3051 | DBG2("Health check return value %d", reply.ret_code); | |
3052 | ||
3053 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3054 | if (ret < 0) { | |
3055 | ERR("Failed to send health data back to client"); | |
3056 | } | |
3057 | ||
3058 | /* End of transmission */ | |
3059 | ret = close(new_sock); | |
3060 | if (ret) { | |
3061 | PERROR("close"); | |
3062 | } | |
3063 | new_sock = -1; | |
3064 | } | |
3065 | ||
139ac872 | 3066 | exit: |
44a5e5eb | 3067 | error: |
139ac872 MD |
3068 | if (err) { |
3069 | ERR("Health error occurred in %s", __func__); | |
3070 | } | |
44a5e5eb DG |
3071 | DBG("Health check thread dying"); |
3072 | unlink(health_unix_sock_path); | |
3073 | if (sock >= 0) { | |
3074 | ret = close(sock); | |
3075 | if (ret) { | |
3076 | PERROR("close"); | |
3077 | } | |
3078 | } | |
3079 | if (new_sock >= 0) { | |
3080 | ret = close(new_sock); | |
3081 | if (ret) { | |
3082 | PERROR("close"); | |
3083 | } | |
3084 | } | |
3085 | ||
3086 | lttng_poll_clean(&events); | |
3087 | ||
3088 | rcu_unregister_thread(); | |
3089 | return NULL; | |
3090 | } | |
3091 | ||
1d4b027a | 3092 | /* |
d063d709 DG |
3093 | * This thread manage all clients request using the unix client socket for |
3094 | * communication. | |
1d4b027a DG |
3095 | */ |
3096 | static void *thread_manage_clients(void *data) | |
3097 | { | |
139ac872 | 3098 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3099 | int sock_error; |
5eb91c98 | 3100 | uint32_t revents, nb_fd; |
273ea72c | 3101 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3102 | struct lttng_poll_event events; |
1d4b027a DG |
3103 | |
3104 | DBG("[thread] Manage client started"); | |
3105 | ||
8ac94142 CB |
3106 | testpoint(thread_manage_clients); |
3107 | ||
f6a9efaa DG |
3108 | rcu_register_thread(); |
3109 | ||
44a5e5eb DG |
3110 | health_code_update(&health_thread_cmd); |
3111 | ||
1d4b027a DG |
3112 | ret = lttcomm_listen_unix_sock(client_sock); |
3113 | if (ret < 0) { | |
35df2755 | 3114 | goto error_listen; |
1d4b027a DG |
3115 | } |
3116 | ||
5eb91c98 DG |
3117 | /* |
3118 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3119 | * more will be added to this poll set. | |
3120 | */ | |
3121 | ret = create_thread_poll_set(&events, 2); | |
3122 | if (ret < 0) { | |
35df2755 | 3123 | goto error_create_poll; |
5eb91c98 | 3124 | } |
273ea72c | 3125 | |
5eb91c98 DG |
3126 | /* Add the application registration socket */ |
3127 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3128 | if (ret < 0) { | |
3129 | goto error; | |
3130 | } | |
273ea72c | 3131 | |
bbd973c2 DG |
3132 | /* |
3133 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3134 | */ |
3135 | if (opt_sig_parent) { | |
8db8d1dc | 3136 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3137 | } |
3138 | ||
8ac94142 CB |
3139 | testpoint(thread_manage_clients_before_loop); |
3140 | ||
44a5e5eb DG |
3141 | health_code_update(&health_thread_cmd); |
3142 | ||
1d4b027a | 3143 | while (1) { |
1d4b027a | 3144 | DBG("Accepting client command ..."); |
273ea72c | 3145 | |
5eb91c98 DG |
3146 | nb_fd = LTTNG_POLL_GETNB(&events); |
3147 | ||
273ea72c | 3148 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 3149 | restart: |
44a5e5eb | 3150 | health_poll_update(&health_thread_cmd); |
5eb91c98 | 3151 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 3152 | health_poll_update(&health_thread_cmd); |
273ea72c | 3153 | if (ret < 0) { |
88f2b785 MD |
3154 | /* |
3155 | * Restart interrupted system call. | |
3156 | */ | |
3157 | if (errno == EINTR) { | |
3158 | goto restart; | |
3159 | } | |
273ea72c DG |
3160 | goto error; |
3161 | } | |
3162 | ||
5eb91c98 DG |
3163 | for (i = 0; i < nb_fd; i++) { |
3164 | /* Fetch once the poll data */ | |
3165 | revents = LTTNG_POLL_GETEV(&events, i); | |
3166 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3167 | ||
44a5e5eb DG |
3168 | health_code_update(&health_thread_cmd); |
3169 | ||
5eb91c98 DG |
3170 | /* Thread quit pipe has been closed. Killing thread. */ |
3171 | ret = check_thread_quit_pipe(pollfd, revents); | |
3172 | if (ret) { | |
139ac872 MD |
3173 | err = 0; |
3174 | goto exit; | |
5eb91c98 DG |
3175 | } |
3176 | ||
3177 | /* Event on the registration socket */ | |
3178 | if (pollfd == client_sock) { | |
3179 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3180 | ERR("Client socket poll error"); | |
3181 | goto error; | |
3182 | } | |
3183 | } | |
3184 | } | |
3185 | ||
3186 | DBG("Wait for client response"); | |
3187 | ||
44a5e5eb DG |
3188 | health_code_update(&health_thread_cmd); |
3189 | ||
5eb91c98 DG |
3190 | sock = lttcomm_accept_unix_sock(client_sock); |
3191 | if (sock < 0) { | |
273ea72c | 3192 | goto error; |
273ea72c DG |
3193 | } |
3194 | ||
b662582b DG |
3195 | /* |
3196 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3197 | * show must go on. | |
3198 | */ | |
3199 | (void) utils_set_fd_cloexec(sock); | |
3200 | ||
be040666 DG |
3201 | /* Set socket option for credentials retrieval */ |
3202 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3203 | if (ret < 0) { | |
3204 | goto error; | |
3205 | } | |
3206 | ||
5eb91c98 | 3207 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3208 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3209 | if (cmd_ctx == NULL) { |
76d7553f | 3210 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3211 | goto error; |
5eb91c98 | 3212 | } |
1d4b027a | 3213 | |
5eb91c98 | 3214 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3215 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3216 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3217 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3218 | goto error; |
3219 | } | |
1d4b027a | 3220 | |
5eb91c98 DG |
3221 | cmd_ctx->llm = NULL; |
3222 | cmd_ctx->session = NULL; | |
1d4b027a | 3223 | |
44a5e5eb DG |
3224 | health_code_update(&health_thread_cmd); |
3225 | ||
5eb91c98 DG |
3226 | /* |
3227 | * Data is received from the lttng client. The struct | |
3228 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3229 | * the client. | |
3230 | */ | |
3231 | DBG("Receiving data from client ..."); | |
be040666 DG |
3232 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3233 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3234 | if (ret <= 0) { |
3235 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3236 | ret = close(sock); |
3237 | if (ret) { | |
3238 | PERROR("close"); | |
3239 | } | |
3240 | sock = -1; | |
a2c0da86 | 3241 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3242 | continue; |
3243 | } | |
1d4b027a | 3244 | |
44a5e5eb DG |
3245 | health_code_update(&health_thread_cmd); |
3246 | ||
5eb91c98 DG |
3247 | // TODO: Validate cmd_ctx including sanity check for |
3248 | // security purpose. | |
f7776ea7 | 3249 | |
f6a9efaa | 3250 | rcu_thread_online(); |
5eb91c98 DG |
3251 | /* |
3252 | * This function dispatch the work to the kernel or userspace tracer | |
3253 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3254 | * informations for the client. The command context struct contains | |
3255 | * everything this function may needs. | |
3256 | */ | |
53a80697 | 3257 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3258 | rcu_thread_offline(); |
5eb91c98 | 3259 | if (ret < 0) { |
53a80697 MD |
3260 | if (sock_error) { |
3261 | ret = close(sock); | |
3262 | if (ret) { | |
3263 | PERROR("close"); | |
3264 | } | |
3265 | sock = -1; | |
3266 | } | |
bbd973c2 | 3267 | /* |
5eb91c98 | 3268 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3269 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3270 | * (ENOMEM). Error detected but still accept |
3271 | * command, unless a socket error has been | |
3272 | * detected. | |
bbd973c2 | 3273 | */ |
bbd973c2 | 3274 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3275 | continue; |
3276 | } | |
d6e4fca4 | 3277 | |
44a5e5eb DG |
3278 | health_code_update(&health_thread_cmd); |
3279 | ||
54d01ffb DG |
3280 | DBG("Sending response (size: %d, retcode: %s)", |
3281 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3282 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3283 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3284 | if (ret < 0) { |
3285 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3286 | } |
1d4b027a | 3287 | |
5eb91c98 | 3288 | /* End of transmission */ |
76d7553f MD |
3289 | ret = close(sock); |
3290 | if (ret) { | |
3291 | PERROR("close"); | |
3292 | } | |
3293 | sock = -1; | |
be040666 DG |
3294 | |
3295 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb DG |
3296 | |
3297 | health_code_update(&health_thread_cmd); | |
273ea72c DG |
3298 | } |
3299 | ||
139ac872 | 3300 | exit: |
5eb91c98 | 3301 | error: |
35df2755 CB |
3302 | if (sock >= 0) { |
3303 | ret = close(sock); | |
3304 | if (ret) { | |
3305 | PERROR("close"); | |
3306 | } | |
139ac872 | 3307 | } |
44a5e5eb | 3308 | |
35df2755 CB |
3309 | lttng_poll_clean(&events); |
3310 | clean_command_ctx(&cmd_ctx); | |
3311 | ||
3312 | error_listen: | |
3313 | error_create_poll: | |
273ea72c | 3314 | unlink(client_unix_sock_path); |
76d7553f MD |
3315 | if (client_sock >= 0) { |
3316 | ret = close(client_sock); | |
3317 | if (ret) { | |
3318 | PERROR("close"); | |
3319 | } | |
a4b35e07 | 3320 | } |
35df2755 CB |
3321 | |
3322 | if (err) { | |
3323 | health_error(&health_thread_cmd); | |
3324 | ERR("Health error occurred in %s", __func__); | |
a4b35e07 | 3325 | } |
273ea72c | 3326 | |
35df2755 CB |
3327 | health_exit(&health_thread_cmd); |
3328 | ||
3329 | DBG("Client thread dying"); | |
f6a9efaa DG |
3330 | |
3331 | rcu_unregister_thread(); | |
1d4b027a DG |
3332 | return NULL; |
3333 | } | |
3334 | ||
3335 | ||
fac6795d DG |
3336 | /* |
3337 | * usage function on stderr | |
3338 | */ | |
3339 | static void usage(void) | |
3340 | { | |
b716ce68 | 3341 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3342 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3343 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3344 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3345 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3346 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3347 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3348 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3349 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3350 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3351 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3352 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3353 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3354 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3355 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3356 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3357 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3358 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3359 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3360 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3361 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3362 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3363 | } |
3364 | ||
3365 | /* | |
3366 | * daemon argument parsing | |
3367 | */ | |
3368 | static int parse_args(int argc, char **argv) | |
3369 | { | |
3370 | int c; | |
3371 | ||
3372 | static struct option long_options[] = { | |
3373 | { "client-sock", 1, 0, 'c' }, | |
3374 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3375 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3376 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3377 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3378 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3379 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3380 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3381 | { "consumerd32-path", 1, 0, 'u' }, | |
3382 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3383 | { "consumerd64-path", 1, 0, 't' }, | |
3384 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3385 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3386 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3387 | { "help", 0, 0, 'h' }, |
3388 | { "group", 1, 0, 'g' }, | |
3389 | { "version", 0, 0, 'V' }, | |
75462a81 | 3390 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3391 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3392 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3393 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3394 | { NULL, 0, 0, 0 } |
3395 | }; | |
3396 | ||
3397 | while (1) { | |
3398 | int option_index = 0; | |
4fba7219 | 3399 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3400 | long_options, &option_index); |
fac6795d DG |
3401 | if (c == -1) { |
3402 | break; | |
3403 | } | |
3404 | ||
3405 | switch (c) { | |
3406 | case 0: | |
3407 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3408 | if (optarg) { | |
3409 | fprintf(stderr, " with arg %s\n", optarg); | |
3410 | } | |
3411 | break; | |
b716ce68 | 3412 | case 'c': |
fac6795d DG |
3413 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3414 | break; | |
3415 | case 'a': | |
3416 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3417 | break; | |
3418 | case 'd': | |
3419 | opt_daemon = 1; | |
3420 | break; | |
3421 | case 'g': | |
fb09408a | 3422 | opt_tracing_group = optarg; |
fac6795d DG |
3423 | break; |
3424 | case 'h': | |
3425 | usage(); | |
3426 | exit(EXIT_FAILURE); | |
3427 | case 'V': | |
3428 | fprintf(stdout, "%s\n", VERSION); | |
3429 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3430 | case 'S': |
3431 | opt_sig_parent = 1; | |
3432 | break; | |
d6f42150 | 3433 | case 'E': |
3bd1e081 | 3434 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3435 | break; |
3436 | case 'C': | |
3bd1e081 MD |
3437 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3438 | break; | |
3439 | case 'F': | |
7753dea8 | 3440 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3441 | break; |
3442 | case 'D': | |
7753dea8 MD |
3443 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3444 | break; | |
3445 | case 'H': | |
3446 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3447 | break; | |
3448 | case 'G': | |
3449 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3450 | break; |
4fba7219 DG |
3451 | case 'N': |
3452 | opt_no_kernel = 1; | |
3453 | break; | |
75462a81 | 3454 | case 'q': |
97e19046 | 3455 | lttng_opt_quiet = 1; |
75462a81 | 3456 | break; |
3f9947db | 3457 | case 'v': |
53086306 | 3458 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3459 | lttng_opt_verbose += 1; |
3f9947db | 3460 | break; |
31f73cc9 | 3461 | case 'Z': |
3bd1e081 | 3462 | opt_verbose_consumer += 1; |
31f73cc9 | 3463 | break; |
fb09408a | 3464 | case 'u': |
fc7a59ce | 3465 | consumerd32_bin= optarg; |
ebaeda94 MD |
3466 | break; |
3467 | case 'U': | |
3468 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3469 | break; |
3470 | case 't': | |
fc7a59ce | 3471 | consumerd64_bin = optarg; |
ebaeda94 MD |
3472 | break; |
3473 | case 'T': | |
3474 | consumerd64_libdir = optarg; | |
fb09408a | 3475 | break; |
fac6795d DG |
3476 | default: |
3477 | /* Unknown option or other error. | |
3478 | * Error is printed by getopt, just return */ | |
3479 | return -1; | |
3480 | } | |
3481 | } | |
3482 | ||
3483 | return 0; | |
3484 | } | |
3485 | ||
3486 | /* | |
d063d709 | 3487 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3488 | * apps_sock - The communication socket for all UST apps. |
3489 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3490 | */ |
cf3af59e | 3491 | static int init_daemon_socket(void) |
fac6795d DG |
3492 | { |
3493 | int ret = 0; | |
3494 | mode_t old_umask; | |
3495 | ||
3496 | old_umask = umask(0); | |
3497 | ||
3498 | /* Create client tool unix socket */ | |
d6f42150 DG |
3499 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3500 | if (client_sock < 0) { | |
3501 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3502 | ret = -1; |
3503 | goto end; | |
3504 | } | |
3505 | ||
b662582b DG |
3506 | /* Set the cloexec flag */ |
3507 | ret = utils_set_fd_cloexec(client_sock); | |
3508 | if (ret < 0) { | |
3509 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3510 | "Continuing but note that the consumer daemon will have a " | |
3511 | "reference to this socket on exec()", client_sock); | |
3512 | } | |
3513 | ||
fac6795d DG |
3514 | /* File permission MUST be 660 */ |
3515 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3516 | if (ret < 0) { | |
d6f42150 | 3517 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3518 | PERROR("chmod"); |
fac6795d DG |
3519 | goto end; |
3520 | } | |
3521 | ||
3522 | /* Create the application unix socket */ | |
d6f42150 DG |
3523 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3524 | if (apps_sock < 0) { | |
3525 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3526 | ret = -1; |
3527 | goto end; | |
3528 | } | |
3529 | ||
b662582b DG |
3530 | /* Set the cloexec flag */ |
3531 | ret = utils_set_fd_cloexec(apps_sock); | |
3532 | if (ret < 0) { | |
3533 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3534 | "Continuing but note that the consumer daemon will have a " | |
3535 | "reference to this socket on exec()", apps_sock); | |
3536 | } | |
3537 | ||
d6f42150 | 3538 | /* File permission MUST be 666 */ |
54d01ffb DG |
3539 | ret = chmod(apps_unix_sock_path, |
3540 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3541 | if (ret < 0) { |
d6f42150 | 3542 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3543 | PERROR("chmod"); |
fac6795d DG |
3544 | goto end; |
3545 | } | |
3546 | ||
b662582b DG |
3547 | DBG3("Session daemon client socket %d and application socket %d created", |
3548 | client_sock, apps_sock); | |
3549 | ||
fac6795d DG |
3550 | end: |
3551 | umask(old_umask); | |
3552 | return ret; | |
3553 | } | |
3554 | ||
3555 | /* | |
54d01ffb DG |
3556 | * Check if the global socket is available, and if a daemon is answering at the |
3557 | * other side. If yes, error is returned. | |
fac6795d | 3558 | */ |
cf3af59e | 3559 | static int check_existing_daemon(void) |
fac6795d | 3560 | { |
7d8234d9 | 3561 | /* Is there anybody out there ? */ |
099e26bd | 3562 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3563 | return -EEXIST; |
099e26bd | 3564 | } |
b09c7c76 DG |
3565 | |
3566 | return 0; | |
fac6795d DG |
3567 | } |
3568 | ||
fac6795d | 3569 | /* |
d063d709 | 3570 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3571 | * |
d063d709 | 3572 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3573 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3574 | */ |
be040666 | 3575 | static int set_permissions(char *rundir) |
fac6795d DG |
3576 | { |
3577 | int ret; | |
996b65c8 | 3578 | gid_t gid; |
fac6795d | 3579 | |
6775595e DG |
3580 | ret = allowed_group(); |
3581 | if (ret < 0) { | |
be040666 DG |
3582 | WARN("No tracing group detected"); |
3583 | ret = 0; | |
fac6795d DG |
3584 | goto end; |
3585 | } | |
3586 | ||
6775595e DG |
3587 | gid = ret; |
3588 | ||
d6f42150 | 3589 | /* Set lttng run dir */ |
be040666 | 3590 | ret = chown(rundir, 0, gid); |
d6f42150 | 3591 | if (ret < 0) { |
be040666 | 3592 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3593 | PERROR("chown"); |
d6f42150 DG |
3594 | } |
3595 | ||
d1613cf5 | 3596 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3597 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3598 | if (ret < 0) { |
3599 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3600 | PERROR("chmod"); |
d1613cf5 JN |
3601 | } |
3602 | ||
d6f42150 | 3603 | /* lttng client socket path */ |
996b65c8 | 3604 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3605 | if (ret < 0) { |
d6f42150 | 3606 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3607 | PERROR("chown"); |
d6f42150 DG |
3608 | } |
3609 | ||
3bd1e081 MD |
3610 | /* kconsumer error socket path */ |
3611 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3612 | if (ret < 0) { |
3bd1e081 | 3613 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3614 | PERROR("chown"); |
3bd1e081 MD |
3615 | } |
3616 | ||
7753dea8 MD |
3617 | /* 64-bit ustconsumer error socket path */ |
3618 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3619 | if (ret < 0) { | |
3620 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3621 | PERROR("chown"); |
7753dea8 MD |
3622 | } |
3623 | ||
3624 | /* 32-bit ustconsumer compat32 error socket path */ | |
3625 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3626 | if (ret < 0) { |
7753dea8 | 3627 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3628 | PERROR("chown"); |
fac6795d DG |
3629 | } |
3630 | ||
d6f42150 | 3631 | DBG("All permissions are set"); |
e07ae692 | 3632 | |
fac6795d DG |
3633 | end: |
3634 | return ret; | |
3635 | } | |
3636 | ||
d6f42150 | 3637 | /* |
d063d709 | 3638 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3639 | */ |
67e40797 | 3640 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3641 | { |
3642 | int ret; | |
3643 | ||
67e40797 DG |
3644 | DBG3("Creating LTTng run directory: %s", rundir); |
3645 | ||
d1613cf5 | 3646 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3647 | if (ret < 0) { |
b1f11e69 | 3648 | if (errno != EEXIST) { |
67e40797 | 3649 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3650 | goto error; |
3651 | } else { | |
3652 | ret = 0; | |
3653 | } | |
d6f42150 DG |
3654 | } |
3655 | ||
3656 | error: | |
3657 | return ret; | |
3658 | } | |
3659 | ||
3660 | /* | |
d063d709 DG |
3661 | * Setup sockets and directory needed by the kconsumerd communication with the |
3662 | * session daemon. | |
d6f42150 | 3663 | */ |
67e40797 DG |
3664 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3665 | const char *rundir) | |
d6f42150 DG |
3666 | { |
3667 | int ret; | |
67e40797 | 3668 | char path[PATH_MAX]; |
d6f42150 | 3669 | |
67e40797 | 3670 | switch (consumer_data->type) { |
7753dea8 | 3671 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3672 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3673 | break; |
3674 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3675 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3676 | break; |
3677 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3678 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3679 | break; |
3680 | default: | |
3681 | ERR("Consumer type unknown"); | |
3682 | ret = -EINVAL; | |
3683 | goto error; | |
d6f42150 DG |
3684 | } |
3685 | ||
67e40797 DG |
3686 | DBG2("Creating consumer directory: %s", path); |
3687 | ||
d1613cf5 | 3688 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3689 | if (ret < 0) { |
6beb2242 | 3690 | if (errno != EEXIST) { |
f11e84c2 | 3691 | PERROR("mkdir"); |
3bd1e081 | 3692 | ERR("Failed to create %s", path); |
6beb2242 DG |
3693 | goto error; |
3694 | } | |
f11e84c2 | 3695 | ret = -1; |
d6f42150 DG |
3696 | } |
3697 | ||
3698 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3699 | consumer_data->err_sock = |
3700 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3701 | if (consumer_data->err_sock < 0) { | |
3702 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3703 | ret = -1; |
3704 | goto error; | |
3705 | } | |
3706 | ||
3707 | /* File permission MUST be 660 */ | |
3bd1e081 | 3708 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3709 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3710 | if (ret < 0) { |
3bd1e081 | 3711 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3712 | PERROR("chmod"); |
d6f42150 DG |
3713 | goto error; |
3714 | } | |
3715 | ||
3716 | error: | |
3717 | return ret; | |
3718 | } | |
3719 | ||
fac6795d | 3720 | /* |
d063d709 | 3721 | * Signal handler for the daemon |
cf3af59e | 3722 | * |
54d01ffb DG |
3723 | * Simply stop all worker threads, leaving main() return gracefully after |
3724 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3725 | */ |
3726 | static void sighandler(int sig) | |
3727 | { | |
3728 | switch (sig) { | |
cf3af59e | 3729 | case SIGPIPE: |
af87c45a | 3730 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3731 | return; |
3732 | case SIGINT: | |
af87c45a | 3733 | DBG("SIGINT caught"); |
cf3af59e MD |
3734 | stop_threads(); |
3735 | break; | |
3736 | case SIGTERM: | |
af87c45a | 3737 | DBG("SIGTERM caught"); |
cf3af59e MD |
3738 | stop_threads(); |
3739 | break; | |
3740 | default: | |
3741 | break; | |
fac6795d | 3742 | } |
fac6795d DG |
3743 | } |
3744 | ||
3745 | /* | |
d063d709 | 3746 | * Setup signal handler for : |
1d4b027a | 3747 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3748 | */ |
1d4b027a | 3749 | static int set_signal_handler(void) |
fac6795d | 3750 | { |
1d4b027a DG |
3751 | int ret = 0; |
3752 | struct sigaction sa; | |
3753 | sigset_t sigset; | |
fac6795d | 3754 | |
1d4b027a | 3755 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3756 | PERROR("sigemptyset"); |
1d4b027a DG |
3757 | return ret; |
3758 | } | |
d6f42150 | 3759 | |
1d4b027a DG |
3760 | sa.sa_handler = sighandler; |
3761 | sa.sa_mask = sigset; | |
3762 | sa.sa_flags = 0; | |
3763 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3764 | PERROR("sigaction"); |
1d4b027a | 3765 | return ret; |
d6f42150 DG |
3766 | } |
3767 | ||
1d4b027a | 3768 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 3769 | PERROR("sigaction"); |
1d4b027a | 3770 | return ret; |
d6f42150 | 3771 | } |
aaf26714 | 3772 | |
1d4b027a | 3773 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 3774 | PERROR("sigaction"); |
1d4b027a | 3775 | return ret; |
8c0faa1d DG |
3776 | } |
3777 | ||
1d4b027a DG |
3778 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3779 | ||
3780 | return ret; | |
fac6795d DG |
3781 | } |
3782 | ||
f3ed775e | 3783 | /* |
d063d709 DG |
3784 | * Set open files limit to unlimited. This daemon can open a large number of |
3785 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3786 | */ |
3787 | static void set_ulimit(void) | |
3788 | { | |
3789 | int ret; | |
3790 | struct rlimit lim; | |
3791 | ||
a88df331 | 3792 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3793 | lim.rlim_cur = 65535; |
3794 | lim.rlim_max = 65535; | |
3795 | ||
3796 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3797 | if (ret < 0) { | |
76d7553f | 3798 | PERROR("failed to set open files limit"); |
f3ed775e DG |
3799 | } |
3800 | } | |
3801 | ||
fac6795d DG |
3802 | /* |
3803 | * main | |
3804 | */ | |
3805 | int main(int argc, char **argv) | |
3806 | { | |
fac6795d DG |
3807 | int ret = 0; |
3808 | void *status; | |
ae9e45b3 | 3809 | const char *home_path, *env_app_timeout; |
fac6795d | 3810 | |
335a95b7 MD |
3811 | init_kernel_workarounds(); |
3812 | ||
f6a9efaa DG |
3813 | rcu_register_thread(); |
3814 | ||
7753dea8 | 3815 | setup_consumerd_path(); |
fb09408a | 3816 | |
fac6795d DG |
3817 | /* Parse arguments */ |
3818 | progname = argv[0]; | |
3819 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 3820 | goto error; |
fac6795d DG |
3821 | } |
3822 | ||
3823 | /* Daemonize */ | |
3824 | if (opt_daemon) { | |
ceed52b5 MD |
3825 | int i; |
3826 | ||
3827 | /* | |
3828 | * fork | |
3829 | * child: setsid, close FD 0, 1, 2, chdir / | |
3830 | * parent: exit (if fork is successful) | |
3831 | */ | |
53094c05 DG |
3832 | ret = daemon(0, 0); |
3833 | if (ret < 0) { | |
76d7553f | 3834 | PERROR("daemon"); |
cf3af59e | 3835 | goto error; |
53094c05 | 3836 | } |
ceed52b5 MD |
3837 | /* |
3838 | * We are in the child. Make sure all other file | |
3839 | * descriptors are closed, in case we are called with | |
3840 | * more opened file descriptors than the standard ones. | |
3841 | */ | |
3842 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3843 | (void) close(i); | |
3844 | } | |
3845 | } | |
3846 | ||
3847 | /* Create thread quit pipe */ | |
3848 | if ((ret = init_thread_quit_pipe()) < 0) { | |
3849 | goto error; | |
fac6795d DG |
3850 | } |
3851 | ||
3852 | /* Check if daemon is UID = 0 */ | |
3853 | is_root = !getuid(); | |
3854 | ||
fac6795d | 3855 | if (is_root) { |
990570ed | 3856 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
3857 | |
3858 | /* Create global run dir with root access */ | |
3859 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 3860 | if (ret < 0) { |
cf3af59e | 3861 | goto error; |
d6f42150 DG |
3862 | } |
3863 | ||
fac6795d | 3864 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
3865 | snprintf(apps_unix_sock_path, PATH_MAX, |
3866 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
3867 | } |
3868 | ||
3869 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
3870 | snprintf(client_unix_sock_path, PATH_MAX, |
3871 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
3872 | } | |
0fdd1e2c DG |
3873 | |
3874 | /* Set global SHM for ust */ | |
3875 | if (strlen(wait_shm_path) == 0) { | |
3876 | snprintf(wait_shm_path, PATH_MAX, | |
3877 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
3878 | } | |
67e40797 | 3879 | |
44a5e5eb DG |
3880 | if (strlen(health_unix_sock_path) == 0) { |
3881 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3882 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
3883 | } | |
3884 | ||
67e40797 DG |
3885 | /* Setup kernel consumerd path */ |
3886 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3887 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 3888 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3889 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3890 | |
3891 | DBG2("Kernel consumer err path: %s", | |
3892 | kconsumer_data.err_unix_sock_path); | |
3893 | DBG2("Kernel consumer cmd path: %s", | |
3894 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 3895 | } else { |
b082db07 DG |
3896 | home_path = get_home_dir(); |
3897 | if (home_path == NULL) { | |
273ea72c DG |
3898 | /* TODO: Add --socket PATH option */ |
3899 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
3900 | ret = -EPERM; |
3901 | goto error; | |
b082db07 DG |
3902 | } |
3903 | ||
67e40797 DG |
3904 | /* |
3905 | * Create rundir from home path. This will create something like | |
3906 | * $HOME/.lttng | |
3907 | */ | |
990570ed | 3908 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
3909 | if (ret < 0) { |
3910 | ret = -ENOMEM; | |
3911 | goto error; | |
3912 | } | |
3913 | ||
3914 | ret = create_lttng_rundir(rundir); | |
3915 | if (ret < 0) { | |
3916 | goto error; | |
3917 | } | |
3918 | ||
fac6795d | 3919 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 3920 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 3921 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
3922 | } |
3923 | ||
3924 | /* Set the cli tool unix socket path */ | |
3925 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 3926 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 3927 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 3928 | } |
0fdd1e2c DG |
3929 | |
3930 | /* Set global SHM for ust */ | |
3931 | if (strlen(wait_shm_path) == 0) { | |
3932 | snprintf(wait_shm_path, PATH_MAX, | |
3933 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
3934 | } | |
44a5e5eb DG |
3935 | |
3936 | /* Set health check Unix path */ | |
3937 | if (strlen(health_unix_sock_path) == 0) { | |
3938 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3939 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
3940 | } | |
fac6795d DG |
3941 | } |
3942 | ||
5c827ce0 DG |
3943 | /* Set consumer initial state */ |
3944 | kernel_consumerd_state = CONSUMER_STOPPED; | |
3945 | ust_consumerd_state = CONSUMER_STOPPED; | |
3946 | ||
847177cd DG |
3947 | DBG("Client socket path %s", client_unix_sock_path); |
3948 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
3949 | DBG("LTTng run directory path: %s", rundir); |
3950 | ||
3951 | /* 32 bits consumerd path setup */ | |
3952 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3953 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 3954 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3955 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3956 | |
3957 | DBG2("UST consumer 32 bits err path: %s", | |
3958 | ustconsumer32_data.err_unix_sock_path); | |
3959 | DBG2("UST consumer 32 bits cmd path: %s", | |
3960 | ustconsumer32_data.cmd_unix_sock_path); | |
3961 | ||
3962 | /* 64 bits consumerd path setup */ | |
3963 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3964 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 3965 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3966 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3967 | |
3968 | DBG2("UST consumer 64 bits err path: %s", | |
3969 | ustconsumer64_data.err_unix_sock_path); | |
3970 | DBG2("UST consumer 64 bits cmd path: %s", | |
3971 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 3972 | |
273ea72c | 3973 | /* |
7d8234d9 | 3974 | * See if daemon already exist. |
fac6795d | 3975 | */ |
7d8234d9 | 3976 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 3977 | ERR("Already running daemon.\n"); |
273ea72c | 3978 | /* |
cf3af59e MD |
3979 | * We do not goto exit because we must not cleanup() |
3980 | * because a daemon is already running. | |
ab118b20 | 3981 | */ |
cf3af59e | 3982 | goto error; |
a88df331 DG |
3983 | } |
3984 | ||
1427f9b2 DG |
3985 | /* |
3986 | * Init UST app hash table. Alloc hash table before this point since | |
3987 | * cleanup() can get called after that point. | |
3988 | */ | |
3989 | ust_app_ht_alloc(); | |
3990 | ||
54d01ffb | 3991 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
3992 | |
3993 | /* | |
3994 | * These actions must be executed as root. We do that *after* setting up | |
3995 | * the sockets path because we MUST make the check for another daemon using | |
3996 | * those paths *before* trying to set the kernel consumer sockets and init | |
3997 | * kernel tracer. | |
3998 | */ | |
3999 | if (is_root) { | |
67e40797 | 4000 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4001 | if (ret < 0) { |
4002 | goto exit; | |
4003 | } | |
4004 | ||
a88df331 | 4005 | /* Setup kernel tracer */ |
4fba7219 DG |
4006 | if (!opt_no_kernel) { |
4007 | init_kernel_tracer(); | |
4008 | } | |
a88df331 DG |
4009 | |
4010 | /* Set ulimit for open files */ | |
4011 | set_ulimit(); | |
fac6795d | 4012 | } |
4063050c MD |
4013 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4014 | lttng_fd_init(); | |
fac6795d | 4015 | |
67e40797 DG |
4016 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4017 | if (ret < 0) { | |
4018 | goto exit; | |
4019 | } | |
4020 | ||
4021 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4022 | if (ret < 0) { | |
4023 | goto exit; | |
4024 | } | |
4025 | ||
cf3af59e MD |
4026 | if ((ret = set_signal_handler()) < 0) { |
4027 | goto exit; | |
fac6795d DG |
4028 | } |
4029 | ||
d6f42150 | 4030 | /* Setup the needed unix socket */ |
cf3af59e MD |
4031 | if ((ret = init_daemon_socket()) < 0) { |
4032 | goto exit; | |
fac6795d DG |
4033 | } |
4034 | ||
4035 | /* Set credentials to socket */ | |
be040666 | 4036 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4037 | goto exit; |
fac6795d DG |
4038 | } |
4039 | ||
5b8719f5 DG |
4040 | /* Get parent pid if -S, --sig-parent is specified. */ |
4041 | if (opt_sig_parent) { | |
4042 | ppid = getppid(); | |
4043 | } | |
4044 | ||
7a485870 | 4045 | /* Setup the kernel pipe for waking up the kernel thread */ |
ef599319 | 4046 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { |
cf3af59e | 4047 | goto exit; |
7a485870 DG |
4048 | } |
4049 | ||
099e26bd | 4050 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4051 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4052 | goto exit; |
4053 | } | |
4054 | ||
4055 | /* Init UST command queue. */ | |
4056 | cds_wfq_init(&ust_cmd_queue.queue); | |
4057 | ||
273ea72c | 4058 | /* |
54d01ffb DG |
4059 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4060 | * statically declared in session.c | |
273ea72c | 4061 | */ |
54d01ffb | 4062 | session_list_ptr = session_get_list(); |
b5541356 | 4063 | |
5eb91c98 DG |
4064 | /* Set up max poll set size */ |
4065 | lttng_poll_set_max_size(); | |
4066 | ||
2f77fc4b | 4067 | cmd_init(); |
00e2e675 | 4068 | |
44a5e5eb DG |
4069 | /* Init all health thread counters. */ |
4070 | health_init(&health_thread_cmd); | |
4071 | health_init(&health_thread_kernel); | |
139ac872 | 4072 | health_init(&health_thread_app_manage); |
44a5e5eb DG |
4073 | health_init(&health_thread_app_reg); |
4074 | ||
4075 | /* | |
4076 | * Init health counters of the consumer thread. We do a quick hack here to | |
4077 | * the state of the consumer health is fine even if the thread is not | |
9449cc75 DG |
4078 | * started. Once the thread starts, the health state is updated with a poll |
4079 | * value to set a health code path. This is simply to ease our life and has | |
4080 | * no cost what so ever. | |
44a5e5eb DG |
4081 | */ |
4082 | health_init(&kconsumer_data.health); | |
4083 | health_poll_update(&kconsumer_data.health); | |
4084 | health_init(&ustconsumer32_data.health); | |
4085 | health_poll_update(&ustconsumer32_data.health); | |
4086 | health_init(&ustconsumer64_data.health); | |
4087 | health_poll_update(&ustconsumer64_data.health); | |
4088 | ||
ae9e45b3 DG |
4089 | /* Check for the application socket timeout env variable. */ |
4090 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4091 | if (env_app_timeout) { | |
4092 | app_socket_timeout = atoi(env_app_timeout); | |
4093 | } else { | |
4094 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4095 | } | |
4096 | ||
44a5e5eb DG |
4097 | /* Create thread to manage the client socket */ |
4098 | ret = pthread_create(&health_thread, NULL, | |
4099 | thread_manage_health, (void *) NULL); | |
4100 | if (ret != 0) { | |
4101 | PERROR("pthread_create health"); | |
4102 | goto exit_health; | |
4103 | } | |
4104 | ||
cf3af59e | 4105 | /* Create thread to manage the client socket */ |
099e26bd DG |
4106 | ret = pthread_create(&client_thread, NULL, |
4107 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4108 | if (ret != 0) { |
76d7553f | 4109 | PERROR("pthread_create clients"); |
cf3af59e MD |
4110 | goto exit_client; |
4111 | } | |
fac6795d | 4112 | |
099e26bd DG |
4113 | /* Create thread to dispatch registration */ |
4114 | ret = pthread_create(&dispatch_thread, NULL, | |
4115 | thread_dispatch_ust_registration, (void *) NULL); | |
4116 | if (ret != 0) { | |
76d7553f | 4117 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4118 | goto exit_dispatch; |
4119 | } | |
4120 | ||
4121 | /* Create thread to manage application registration. */ | |
4122 | ret = pthread_create(®_apps_thread, NULL, | |
4123 | thread_registration_apps, (void *) NULL); | |
4124 | if (ret != 0) { | |
76d7553f | 4125 | PERROR("pthread_create registration"); |
099e26bd DG |
4126 | goto exit_reg_apps; |
4127 | } | |
4128 | ||
cf3af59e | 4129 | /* Create thread to manage application socket */ |
54d01ffb DG |
4130 | ret = pthread_create(&apps_thread, NULL, |
4131 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4132 | if (ret != 0) { |
76d7553f | 4133 | PERROR("pthread_create apps"); |
cf3af59e MD |
4134 | goto exit_apps; |
4135 | } | |
fac6795d | 4136 | |
cf3af59e | 4137 | /* Create kernel thread to manage kernel event */ |
54d01ffb DG |
4138 | ret = pthread_create(&kernel_thread, NULL, |
4139 | thread_manage_kernel, (void *) NULL); | |
cf3af59e | 4140 | if (ret != 0) { |
76d7553f | 4141 | PERROR("pthread_create kernel"); |
cf3af59e MD |
4142 | goto exit_kernel; |
4143 | } | |
7a485870 | 4144 | |
cf3af59e MD |
4145 | ret = pthread_join(kernel_thread, &status); |
4146 | if (ret != 0) { | |
76d7553f | 4147 | PERROR("pthread_join"); |
cf3af59e | 4148 | goto error; /* join error, exit without cleanup */ |
fac6795d DG |
4149 | } |
4150 | ||
cf3af59e MD |
4151 | exit_kernel: |
4152 | ret = pthread_join(apps_thread, &status); | |
4153 | if (ret != 0) { | |
76d7553f | 4154 | PERROR("pthread_join"); |
cf3af59e MD |
4155 | goto error; /* join error, exit without cleanup */ |
4156 | } | |
fac6795d | 4157 | |
cf3af59e | 4158 | exit_apps: |
099e26bd DG |
4159 | ret = pthread_join(reg_apps_thread, &status); |
4160 | if (ret != 0) { | |
76d7553f | 4161 | PERROR("pthread_join"); |
099e26bd DG |
4162 | goto error; /* join error, exit without cleanup */ |
4163 | } | |
4164 | ||
4165 | exit_reg_apps: | |
4166 | ret = pthread_join(dispatch_thread, &status); | |
4167 | if (ret != 0) { | |
76d7553f | 4168 | PERROR("pthread_join"); |
099e26bd DG |
4169 | goto error; /* join error, exit without cleanup */ |
4170 | } | |
4171 | ||
4172 | exit_dispatch: | |
cf3af59e MD |
4173 | ret = pthread_join(client_thread, &status); |
4174 | if (ret != 0) { | |
76d7553f | 4175 | PERROR("pthread_join"); |
cf3af59e MD |
4176 | goto error; /* join error, exit without cleanup */ |
4177 | } | |
4178 | ||
3bd1e081 | 4179 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4180 | if (ret != 0) { |
76d7553f | 4181 | PERROR("join_consumer"); |
cf3af59e MD |
4182 | goto error; /* join error, exit without cleanup */ |
4183 | } | |
a88df331 | 4184 | |
06f525de DG |
4185 | ret = join_consumer_thread(&ustconsumer32_data); |
4186 | if (ret != 0) { | |
4187 | PERROR("join_consumer ust32"); | |
4188 | goto error; /* join error, exit without cleanup */ | |
4189 | } | |
4190 | ||
4191 | ret = join_consumer_thread(&ustconsumer64_data); | |
4192 | if (ret != 0) { | |
4193 | PERROR("join_consumer ust64"); | |
4194 | goto error; /* join error, exit without cleanup */ | |
4195 | } | |
4196 | ||
cf3af59e | 4197 | exit_client: |
06f525de DG |
4198 | ret = pthread_join(health_thread, &status); |
4199 | if (ret != 0) { | |
4200 | PERROR("pthread_join health thread"); | |
4201 | goto error; /* join error, exit without cleanup */ | |
4202 | } | |
4203 | ||
44a5e5eb | 4204 | exit_health: |
a88df331 | 4205 | exit: |
cf3af59e MD |
4206 | /* |
4207 | * cleanup() is called when no other thread is running. | |
4208 | */ | |
f6a9efaa | 4209 | rcu_thread_online(); |
cf3af59e | 4210 | cleanup(); |
f6a9efaa DG |
4211 | rcu_thread_offline(); |
4212 | rcu_unregister_thread(); | |
67e40797 | 4213 | if (!ret) { |
cf3af59e | 4214 | exit(EXIT_SUCCESS); |
67e40797 | 4215 | } |
cf3af59e | 4216 | error: |
5e16da05 | 4217 | exit(EXIT_FAILURE); |
fac6795d | 4218 | } |