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; |
6620da75 | 400 | char *cmd = NULL; |
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 | |
421cb601 | 450 | /* <fun> */ |
f56a39af | 451 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
452 | "Matthew, BEET driven development works!%c[%dm", |
453 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
454 | /* </fun> */ | |
fac6795d DG |
455 | } |
456 | ||
e065084a | 457 | /* |
d063d709 | 458 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 459 | * |
d063d709 | 460 | * Return lttcomm error code. |
e065084a DG |
461 | */ |
462 | static int send_unix_sock(int sock, void *buf, size_t len) | |
463 | { | |
464 | /* Check valid length */ | |
465 | if (len <= 0) { | |
466 | return -1; | |
467 | } | |
468 | ||
469 | return lttcomm_send_unix_sock(sock, buf, len); | |
470 | } | |
471 | ||
5461b305 | 472 | /* |
d063d709 | 473 | * Free memory of a command context structure. |
5461b305 | 474 | */ |
a2fb29a5 | 475 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 476 | { |
a2fb29a5 DG |
477 | DBG("Clean command context structure"); |
478 | if (*cmd_ctx) { | |
479 | if ((*cmd_ctx)->llm) { | |
480 | free((*cmd_ctx)->llm); | |
5461b305 | 481 | } |
a2fb29a5 DG |
482 | if ((*cmd_ctx)->lsm) { |
483 | free((*cmd_ctx)->lsm); | |
5461b305 | 484 | } |
a2fb29a5 DG |
485 | free(*cmd_ctx); |
486 | *cmd_ctx = NULL; | |
5461b305 DG |
487 | } |
488 | } | |
489 | ||
fac6795d | 490 | /* |
0fdd1e2c | 491 | * Notify UST applications using the shm mmap futex. |
fac6795d | 492 | */ |
0fdd1e2c | 493 | static int notify_ust_apps(int active) |
fac6795d | 494 | { |
0fdd1e2c | 495 | char *wait_shm_mmap; |
fac6795d | 496 | |
0fdd1e2c | 497 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 498 | |
0fdd1e2c DG |
499 | /* See shm.c for this call implying mmap, shm and futex calls */ |
500 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
501 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
502 | goto error; |
503 | } | |
504 | ||
0fdd1e2c DG |
505 | /* Wake waiting process */ |
506 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
507 | ||
508 | /* Apps notified successfully */ | |
509 | return 0; | |
fac6795d DG |
510 | |
511 | error: | |
0fdd1e2c | 512 | return -1; |
fac6795d DG |
513 | } |
514 | ||
e065084a | 515 | /* |
d063d709 DG |
516 | * Setup the outgoing data buffer for the response (llm) by allocating the |
517 | * right amount of memory and copying the original information from the lsm | |
518 | * structure. | |
ca95a216 | 519 | * |
d063d709 | 520 | * Return total size of the buffer pointed by buf. |
ca95a216 | 521 | */ |
5461b305 | 522 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 523 | { |
f3ed775e | 524 | int ret, buf_size; |
ca95a216 | 525 | |
f3ed775e | 526 | buf_size = size; |
5461b305 | 527 | |
ba7f0ae5 | 528 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 529 | if (cmd_ctx->llm == NULL) { |
76d7553f | 530 | PERROR("zmalloc"); |
5461b305 | 531 | ret = -ENOMEM; |
ca95a216 DG |
532 | goto error; |
533 | } | |
534 | ||
5461b305 DG |
535 | /* Copy common data */ |
536 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 537 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 538 | |
5461b305 DG |
539 | cmd_ctx->llm->data_size = size; |
540 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
541 | ||
ca95a216 DG |
542 | return buf_size; |
543 | ||
544 | error: | |
545 | return ret; | |
546 | } | |
547 | ||
7a485870 | 548 | /* |
5eb91c98 | 549 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 550 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 551 | */ |
5eb91c98 | 552 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 553 | { |
5eb91c98 | 554 | int ret; |
7a485870 DG |
555 | struct ltt_session *session; |
556 | struct ltt_kernel_channel *channel; | |
557 | ||
5eb91c98 | 558 | DBG("Updating kernel poll set"); |
7a485870 | 559 | |
54d01ffb | 560 | session_lock_list(); |
b5541356 | 561 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 562 | session_lock(session); |
7a485870 | 563 | if (session->kernel_session == NULL) { |
54d01ffb | 564 | session_unlock(session); |
7a485870 DG |
565 | continue; |
566 | } | |
7a485870 | 567 | |
54d01ffb DG |
568 | cds_list_for_each_entry(channel, |
569 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
570 | /* Add channel fd to the kernel poll set */ |
571 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
572 | if (ret < 0) { | |
54d01ffb | 573 | session_unlock(session); |
5eb91c98 DG |
574 | goto error; |
575 | } | |
576 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 577 | } |
54d01ffb | 578 | session_unlock(session); |
7a485870 | 579 | } |
54d01ffb | 580 | session_unlock_list(); |
7a485870 | 581 | |
5eb91c98 | 582 | return 0; |
7a485870 DG |
583 | |
584 | error: | |
54d01ffb | 585 | session_unlock_list(); |
7a485870 DG |
586 | return -1; |
587 | } | |
588 | ||
589 | /* | |
54d01ffb | 590 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 591 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 592 | * |
d063d709 | 593 | * Useful for CPU hotplug feature. |
7a485870 | 594 | */ |
2bdd86d4 | 595 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
596 | { |
597 | int ret = 0; | |
598 | struct ltt_session *session; | |
173af62f | 599 | struct ltt_kernel_session *ksess; |
7a485870 DG |
600 | struct ltt_kernel_channel *channel; |
601 | ||
602 | DBG("Updating kernel streams for channel fd %d", fd); | |
603 | ||
54d01ffb | 604 | session_lock_list(); |
b5541356 | 605 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 606 | session_lock(session); |
7a485870 | 607 | if (session->kernel_session == NULL) { |
54d01ffb | 608 | session_unlock(session); |
7a485870 DG |
609 | continue; |
610 | } | |
173af62f | 611 | ksess = session->kernel_session; |
d9800920 | 612 | |
173af62f | 613 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
614 | if (channel->fd == fd) { |
615 | DBG("Channel found, updating kernel streams"); | |
616 | ret = kernel_open_channel_stream(channel); | |
617 | if (ret < 0) { | |
b3c750d2 | 618 | goto error; |
7a485870 | 619 | } |
d9800920 | 620 | |
7a485870 | 621 | /* |
5eb91c98 DG |
622 | * Have we already sent fds to the consumer? If yes, it means |
623 | * that tracing is started so it is safe to send our updated | |
624 | * stream fds. | |
7a485870 | 625 | */ |
173af62f DG |
626 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
627 | struct lttng_ht_iter iter; | |
628 | struct consumer_socket *socket; | |
629 | ||
630 | ||
631 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
632 | &iter.iter, socket, node.node) { | |
633 | /* Code flow error */ | |
634 | assert(socket->fd >= 0); | |
635 | ||
636 | pthread_mutex_lock(socket->lock); | |
637 | ret = kernel_consumer_send_channel_stream(socket->fd, | |
638 | channel, ksess); | |
639 | pthread_mutex_unlock(socket->lock); | |
640 | if (ret < 0) { | |
641 | goto error; | |
642 | } | |
7a485870 DG |
643 | } |
644 | } | |
b3c750d2 | 645 | goto error; |
7a485870 DG |
646 | } |
647 | } | |
54d01ffb | 648 | session_unlock(session); |
7a485870 | 649 | } |
54d01ffb | 650 | session_unlock_list(); |
b3c750d2 | 651 | return ret; |
7a485870 | 652 | |
b3c750d2 | 653 | error: |
54d01ffb DG |
654 | session_unlock(session); |
655 | session_unlock_list(); | |
7a485870 DG |
656 | return ret; |
657 | } | |
658 | ||
487cf67c DG |
659 | /* |
660 | * For each tracing session, update newly registered apps. | |
661 | */ | |
662 | static void update_ust_app(int app_sock) | |
663 | { | |
664 | struct ltt_session *sess, *stmp; | |
665 | ||
4ee14516 DG |
666 | session_lock_list(); |
667 | ||
487cf67c DG |
668 | /* For all tracing session(s) */ |
669 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 670 | session_lock(sess); |
421cb601 DG |
671 | if (sess->ust_session) { |
672 | ust_app_global_update(sess->ust_session, app_sock); | |
673 | } | |
4ee14516 | 674 | session_unlock(sess); |
487cf67c | 675 | } |
4ee14516 DG |
676 | |
677 | session_unlock_list(); | |
487cf67c DG |
678 | } |
679 | ||
7a485870 | 680 | /* |
d063d709 | 681 | * This thread manage event coming from the kernel. |
7a485870 | 682 | * |
d063d709 DG |
683 | * Features supported in this thread: |
684 | * -) CPU Hotplug | |
7a485870 DG |
685 | */ |
686 | static void *thread_manage_kernel(void *data) | |
687 | { | |
139ac872 | 688 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 689 | uint32_t revents, nb_fd; |
7a485870 | 690 | char tmp; |
5eb91c98 | 691 | struct lttng_poll_event events; |
7a485870 DG |
692 | |
693 | DBG("Thread manage kernel started"); | |
694 | ||
8ac94142 CB |
695 | testpoint(thread_manage_kernel); |
696 | ||
44a5e5eb DG |
697 | health_code_update(&health_thread_kernel); |
698 | ||
8ac94142 CB |
699 | testpoint(thread_manage_kernel_before_loop); |
700 | ||
5eb91c98 DG |
701 | ret = create_thread_poll_set(&events, 2); |
702 | if (ret < 0) { | |
76d7553f | 703 | goto error_poll_create; |
5eb91c98 DG |
704 | } |
705 | ||
706 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
707 | if (ret < 0) { | |
708 | goto error; | |
709 | } | |
710 | ||
7a485870 | 711 | while (1) { |
44a5e5eb DG |
712 | health_code_update(&health_thread_kernel); |
713 | ||
7a485870 | 714 | if (update_poll_flag == 1) { |
5f822d0a DG |
715 | /* |
716 | * Reset number of fd in the poll set. Always 2 since there is the thread | |
717 | * quit pipe and the kernel pipe. | |
718 | */ | |
719 | events.nb_fd = 2; | |
720 | ||
5eb91c98 DG |
721 | ret = update_kernel_poll(&events); |
722 | if (ret < 0) { | |
7a485870 DG |
723 | goto error; |
724 | } | |
725 | update_poll_flag = 0; | |
726 | } | |
727 | ||
5eb91c98 DG |
728 | nb_fd = LTTNG_POLL_GETNB(&events); |
729 | ||
730 | DBG("Thread kernel polling on %d fds", nb_fd); | |
731 | ||
732 | /* Zeroed the poll events */ | |
733 | lttng_poll_reset(&events); | |
7a485870 DG |
734 | |
735 | /* Poll infinite value of time */ | |
88f2b785 | 736 | restart: |
44a5e5eb | 737 | health_poll_update(&health_thread_kernel); |
5eb91c98 | 738 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 739 | health_poll_update(&health_thread_kernel); |
7a485870 | 740 | if (ret < 0) { |
88f2b785 MD |
741 | /* |
742 | * Restart interrupted system call. | |
743 | */ | |
744 | if (errno == EINTR) { | |
745 | goto restart; | |
746 | } | |
7a485870 DG |
747 | goto error; |
748 | } else if (ret == 0) { | |
749 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
750 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
751 | "This should not have happened! Continuing..."); | |
7a485870 DG |
752 | continue; |
753 | } | |
754 | ||
5eb91c98 DG |
755 | for (i = 0; i < nb_fd; i++) { |
756 | /* Fetch once the poll data */ | |
757 | revents = LTTNG_POLL_GETEV(&events, i); | |
758 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 759 | |
44a5e5eb DG |
760 | health_code_update(&health_thread_kernel); |
761 | ||
5eb91c98 DG |
762 | /* Thread quit pipe has been closed. Killing thread. */ |
763 | ret = check_thread_quit_pipe(pollfd, revents); | |
764 | if (ret) { | |
139ac872 MD |
765 | err = 0; |
766 | goto exit; | |
5eb91c98 | 767 | } |
7a485870 | 768 | |
5eb91c98 DG |
769 | /* Check for data on kernel pipe */ |
770 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
771 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
772 | update_poll_flag = 1; | |
773 | continue; | |
774 | } else { | |
775 | /* | |
776 | * New CPU detected by the kernel. Adding kernel stream to | |
777 | * kernel session and updating the kernel consumer | |
778 | */ | |
779 | if (revents & LPOLLIN) { | |
2bdd86d4 | 780 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
781 | if (ret < 0) { |
782 | continue; | |
783 | } | |
784 | break; | |
785 | /* | |
786 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
787 | * and unregister kernel stream at this point. | |
788 | */ | |
7a485870 | 789 | } |
7a485870 DG |
790 | } |
791 | } | |
792 | } | |
793 | ||
139ac872 | 794 | exit: |
7a485870 | 795 | error: |
5eb91c98 | 796 | lttng_poll_clean(&events); |
76d7553f | 797 | error_poll_create: |
6620da75 DG |
798 | utils_close_pipe(kernel_poll_pipe); |
799 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 MD |
800 | if (err) { |
801 | health_error(&health_thread_kernel); | |
802 | ERR("Health error occurred in %s", __func__); | |
6620da75 DG |
803 | WARN("Kernel thread died unexpectedly. " |
804 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 MD |
805 | } |
806 | health_exit(&health_thread_kernel); | |
76d7553f | 807 | DBG("Kernel thread dying"); |
7a485870 DG |
808 | return NULL; |
809 | } | |
810 | ||
a23ec3a7 DG |
811 | /* |
812 | * Signal pthread condition of the consumer data that the thread. | |
813 | */ | |
814 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
815 | { | |
816 | pthread_mutex_lock(&data->cond_mutex); | |
817 | ||
818 | /* | |
819 | * The state is set before signaling. It can be any value, it's the waiter | |
820 | * job to correctly interpret this condition variable associated to the | |
821 | * consumer pthread_cond. | |
822 | * | |
823 | * A value of 0 means that the corresponding thread of the consumer data | |
824 | * was not started. 1 indicates that the thread has started and is ready | |
825 | * for action. A negative value means that there was an error during the | |
826 | * thread bootstrap. | |
827 | */ | |
828 | data->consumer_thread_is_ready = state; | |
829 | (void) pthread_cond_signal(&data->cond); | |
830 | ||
831 | pthread_mutex_unlock(&data->cond_mutex); | |
832 | } | |
833 | ||
1d4b027a | 834 | /* |
3bd1e081 | 835 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 836 | */ |
3bd1e081 | 837 | static void *thread_manage_consumer(void *data) |
1d4b027a | 838 | { |
139ac872 | 839 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 840 | uint32_t revents, nb_fd; |
1d4b027a | 841 | enum lttcomm_return_code code; |
5eb91c98 | 842 | struct lttng_poll_event events; |
3bd1e081 | 843 | struct consumer_data *consumer_data = data; |
1d4b027a | 844 | |
3bd1e081 | 845 | DBG("[thread] Manage consumer started"); |
1d4b027a | 846 | |
9449cc75 DG |
847 | /* |
848 | * Since the consumer thread can be spawned at any moment in time, we init | |
849 | * the health to a poll status (1, which is a valid health over time). | |
850 | * When the thread starts, we update here the health to a "code" path being | |
851 | * an even value so this thread, when reaching a poll wait, does not | |
852 | * trigger an error with an even value. | |
853 | * | |
854 | * Here is the use case we avoid. | |
855 | * | |
856 | * +1: the first poll update during initialization (main()) | |
857 | * +2 * x: multiple code update once in this thread. | |
858 | * +1: poll wait in this thread (being a good health state). | |
859 | * == even number which after the wait period shows as a bad health. | |
860 | * | |
861 | * In a nutshell, the following poll update to the health state brings back | |
862 | * the state to an even value meaning a code path. | |
863 | */ | |
864 | health_poll_update(&consumer_data->health); | |
865 | ||
5eb91c98 DG |
866 | /* |
867 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
868 | * Nothing more will be added to this poll set. | |
869 | */ | |
870 | ret = create_thread_poll_set(&events, 2); | |
871 | if (ret < 0) { | |
76d7553f | 872 | goto error_poll; |
5eb91c98 | 873 | } |
273ea72c | 874 | |
edb8b045 DG |
875 | /* |
876 | * The error socket here is already in a listening state which was done | |
877 | * just before spawning this thread to avoid a race between the consumer | |
878 | * daemon exec trying to connect and the listen() call. | |
879 | */ | |
3bd1e081 | 880 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
881 | if (ret < 0) { |
882 | goto error; | |
883 | } | |
884 | ||
885 | nb_fd = LTTNG_POLL_GETNB(&events); | |
273ea72c | 886 | |
44a5e5eb DG |
887 | health_code_update(&consumer_data->health); |
888 | ||
273ea72c | 889 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 890 | restart: |
44a5e5eb | 891 | health_poll_update(&consumer_data->health); |
8ac94142 CB |
892 | |
893 | testpoint(thread_manage_consumer); | |
894 | ||
5eb91c98 | 895 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 896 | health_poll_update(&consumer_data->health); |
273ea72c | 897 | if (ret < 0) { |
88f2b785 MD |
898 | /* |
899 | * Restart interrupted system call. | |
900 | */ | |
901 | if (errno == EINTR) { | |
902 | goto restart; | |
903 | } | |
273ea72c DG |
904 | goto error; |
905 | } | |
906 | ||
5eb91c98 DG |
907 | for (i = 0; i < nb_fd; i++) { |
908 | /* Fetch once the poll data */ | |
909 | revents = LTTNG_POLL_GETEV(&events, i); | |
910 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
911 | ||
44a5e5eb DG |
912 | health_code_update(&consumer_data->health); |
913 | ||
5eb91c98 DG |
914 | /* Thread quit pipe has been closed. Killing thread. */ |
915 | ret = check_thread_quit_pipe(pollfd, revents); | |
916 | if (ret) { | |
139ac872 MD |
917 | err = 0; |
918 | goto exit; | |
5eb91c98 DG |
919 | } |
920 | ||
921 | /* Event on the registration socket */ | |
3bd1e081 | 922 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 923 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 924 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
925 | goto error; |
926 | } | |
927 | } | |
273ea72c DG |
928 | } |
929 | ||
3bd1e081 | 930 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
931 | if (sock < 0) { |
932 | goto error; | |
933 | } | |
934 | ||
b662582b DG |
935 | /* |
936 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
937 | * show must go on. | |
938 | */ | |
939 | (void) utils_set_fd_cloexec(sock); | |
940 | ||
44a5e5eb DG |
941 | health_code_update(&consumer_data->health); |
942 | ||
3bd1e081 | 943 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 944 | |
712ea556 | 945 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
946 | ret = lttcomm_recv_unix_sock(sock, &code, |
947 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
948 | if (ret <= 0) { |
949 | goto error; | |
950 | } | |
951 | ||
44a5e5eb DG |
952 | health_code_update(&consumer_data->health); |
953 | ||
f73fabfd | 954 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 MD |
955 | consumer_data->cmd_sock = |
956 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
957 | if (consumer_data->cmd_sock < 0) { | |
a23ec3a7 DG |
958 | /* On error, signal condition and quit. */ |
959 | signal_consumer_condition(consumer_data, -1); | |
48842b30 | 960 | PERROR("consumer connect"); |
1d4b027a DG |
961 | goto error; |
962 | } | |
a23ec3a7 DG |
963 | signal_consumer_condition(consumer_data, 1); |
964 | DBG("Consumer command socket ready"); | |
1d4b027a | 965 | } else { |
3bd1e081 | 966 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
967 | lttcomm_get_readable_code(-code)); |
968 | goto error; | |
969 | } | |
970 | ||
54d01ffb | 971 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 972 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 973 | if (ret < 0) { |
72079cae DG |
974 | goto error; |
975 | } | |
976 | ||
5eb91c98 DG |
977 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
978 | if (ret < 0) { | |
72079cae | 979 | goto error; |
5eb91c98 DG |
980 | } |
981 | ||
44a5e5eb DG |
982 | health_code_update(&consumer_data->health); |
983 | ||
5eb91c98 DG |
984 | /* Update number of fd */ |
985 | nb_fd = LTTNG_POLL_GETNB(&events); | |
986 | ||
987 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 988 | restart_poll: |
44a5e5eb | 989 | health_poll_update(&consumer_data->health); |
5eb91c98 | 990 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 991 | health_poll_update(&consumer_data->health); |
5eb91c98 | 992 | if (ret < 0) { |
88f2b785 MD |
993 | /* |
994 | * Restart interrupted system call. | |
995 | */ | |
996 | if (errno == EINTR) { | |
997 | goto restart_poll; | |
998 | } | |
72079cae DG |
999 | goto error; |
1000 | } | |
1001 | ||
5eb91c98 DG |
1002 | for (i = 0; i < nb_fd; i++) { |
1003 | /* Fetch once the poll data */ | |
1004 | revents = LTTNG_POLL_GETEV(&events, i); | |
1005 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1006 | ||
44a5e5eb DG |
1007 | health_code_update(&consumer_data->health); |
1008 | ||
5eb91c98 DG |
1009 | /* Thread quit pipe has been closed. Killing thread. */ |
1010 | ret = check_thread_quit_pipe(pollfd, revents); | |
1011 | if (ret) { | |
139ac872 MD |
1012 | err = 0; |
1013 | goto exit; | |
5eb91c98 DG |
1014 | } |
1015 | ||
1016 | /* Event on the kconsumerd socket */ | |
1017 | if (pollfd == sock) { | |
1018 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1019 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1020 | goto error; |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | ||
44a5e5eb DG |
1025 | health_code_update(&consumer_data->health); |
1026 | ||
712ea556 | 1027 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1028 | ret = lttcomm_recv_unix_sock(sock, &code, |
1029 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1030 | if (ret <= 0) { |
3bd1e081 | 1031 | ERR("consumer closed the command socket"); |
712ea556 | 1032 | goto error; |
6f61d021 | 1033 | } |
1d4b027a | 1034 | |
3bd1e081 | 1035 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1036 | |
139ac872 | 1037 | exit: |
1d4b027a | 1038 | error: |
5c827ce0 DG |
1039 | /* Immediately set the consumerd state to stopped */ |
1040 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1041 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1042 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1043 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1044 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1045 | } else { | |
1046 | /* Code flow error... */ | |
1047 | assert(0); | |
1048 | } | |
1049 | ||
76d7553f MD |
1050 | if (consumer_data->err_sock >= 0) { |
1051 | ret = close(consumer_data->err_sock); | |
1052 | if (ret) { | |
1053 | PERROR("close"); | |
1054 | } | |
1055 | } | |
1056 | if (consumer_data->cmd_sock >= 0) { | |
1057 | ret = close(consumer_data->cmd_sock); | |
1058 | if (ret) { | |
1059 | PERROR("close"); | |
1060 | } | |
1061 | } | |
1062 | if (sock >= 0) { | |
1063 | ret = close(sock); | |
1064 | if (ret) { | |
1065 | PERROR("close"); | |
1066 | } | |
1067 | } | |
273ea72c | 1068 | |
3bd1e081 MD |
1069 | unlink(consumer_data->err_unix_sock_path); |
1070 | unlink(consumer_data->cmd_unix_sock_path); | |
1071 | consumer_data->pid = 0; | |
1d4b027a | 1072 | |
5eb91c98 | 1073 | lttng_poll_clean(&events); |
76d7553f | 1074 | error_poll: |
139ac872 MD |
1075 | if (err) { |
1076 | health_error(&consumer_data->health); | |
1077 | ERR("Health error occurred in %s", __func__); | |
1078 | } | |
1079 | health_exit(&consumer_data->health); | |
76d7553f | 1080 | DBG("consumer thread cleanup completed"); |
0177d773 | 1081 | |
5eb91c98 | 1082 | return NULL; |
099e26bd DG |
1083 | } |
1084 | ||
099e26bd DG |
1085 | /* |
1086 | * This thread manage application communication. | |
1d4b027a DG |
1087 | */ |
1088 | static void *thread_manage_apps(void *data) | |
099e26bd | 1089 | { |
139ac872 | 1090 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1091 | uint32_t revents, nb_fd; |
099e26bd | 1092 | struct ust_command ust_cmd; |
5eb91c98 | 1093 | struct lttng_poll_event events; |
099e26bd DG |
1094 | |
1095 | DBG("[thread] Manage application started"); | |
1096 | ||
8ac94142 CB |
1097 | testpoint(thread_manage_apps); |
1098 | ||
f6a9efaa DG |
1099 | rcu_register_thread(); |
1100 | rcu_thread_online(); | |
1101 | ||
139ac872 | 1102 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1103 | |
5eb91c98 DG |
1104 | ret = create_thread_poll_set(&events, 2); |
1105 | if (ret < 0) { | |
76d7553f | 1106 | goto error_poll_create; |
5eb91c98 | 1107 | } |
099e26bd | 1108 | |
5eb91c98 DG |
1109 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1110 | if (ret < 0) { | |
1111 | goto error; | |
1112 | } | |
099e26bd | 1113 | |
8ac94142 CB |
1114 | testpoint(thread_manage_apps_before_loop); |
1115 | ||
139ac872 | 1116 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1117 | |
5eb91c98 DG |
1118 | while (1) { |
1119 | /* Zeroed the events structure */ | |
1120 | lttng_poll_reset(&events); | |
0177d773 | 1121 | |
5eb91c98 | 1122 | nb_fd = LTTNG_POLL_GETNB(&events); |
099e26bd DG |
1123 | |
1124 | DBG("Apps thread polling on %d fds", nb_fd); | |
1125 | ||
1126 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1127 | restart: |
139ac872 | 1128 | health_poll_update(&health_thread_app_manage); |
5eb91c98 | 1129 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1130 | health_poll_update(&health_thread_app_manage); |
099e26bd | 1131 | if (ret < 0) { |
88f2b785 MD |
1132 | /* |
1133 | * Restart interrupted system call. | |
1134 | */ | |
1135 | if (errno == EINTR) { | |
1136 | goto restart; | |
1137 | } | |
099e26bd DG |
1138 | goto error; |
1139 | } | |
1140 | ||
5eb91c98 DG |
1141 | for (i = 0; i < nb_fd; i++) { |
1142 | /* Fetch once the poll data */ | |
1143 | revents = LTTNG_POLL_GETEV(&events, i); | |
1144 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1145 | ||
139ac872 | 1146 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1147 | |
5eb91c98 DG |
1148 | /* Thread quit pipe has been closed. Killing thread. */ |
1149 | ret = check_thread_quit_pipe(pollfd, revents); | |
1150 | if (ret) { | |
139ac872 MD |
1151 | err = 0; |
1152 | goto exit; | |
5eb91c98 | 1153 | } |
099e26bd | 1154 | |
5eb91c98 DG |
1155 | /* Inspect the apps cmd pipe */ |
1156 | if (pollfd == apps_cmd_pipe[0]) { | |
1157 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1158 | ERR("Apps command pipe error"); | |
0177d773 | 1159 | goto error; |
5eb91c98 DG |
1160 | } else if (revents & LPOLLIN) { |
1161 | /* Empty pipe */ | |
1162 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1163 | if (ret < 0 || ret < sizeof(ust_cmd)) { | |
76d7553f | 1164 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1165 | goto error; |
1166 | } | |
099e26bd | 1167 | |
139ac872 | 1168 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1169 | |
5eb91c98 | 1170 | /* Register applicaton to the session daemon */ |
56fff090 | 1171 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1172 | ust_cmd.sock); |
88ff5b7f | 1173 | if (ret == -ENOMEM) { |
5eb91c98 | 1174 | goto error; |
88ff5b7f MD |
1175 | } else if (ret < 0) { |
1176 | break; | |
5eb91c98 DG |
1177 | } |
1178 | ||
139ac872 | 1179 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1180 | |
acc7b41b | 1181 | /* |
e0c7ec2b | 1182 | * Validate UST version compatibility. |
acc7b41b | 1183 | */ |
e0c7ec2b DG |
1184 | ret = ust_app_validate_version(ust_cmd.sock); |
1185 | if (ret >= 0) { | |
1186 | /* | |
1187 | * Add channel(s) and event(s) to newly registered apps | |
1188 | * from lttng global UST domain. | |
1189 | */ | |
1190 | update_ust_app(ust_cmd.sock); | |
1191 | } | |
acc7b41b | 1192 | |
139ac872 | 1193 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1194 | |
f2ca2e25 | 1195 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1196 | if (ret < 0) { |
1197 | /* | |
1198 | * If the registration is not possible, we simply | |
1199 | * unregister the apps and continue | |
1200 | */ | |
56fff090 | 1201 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1202 | } else { |
1203 | /* | |
622c9ecf DG |
1204 | * We only monitor the error events of the socket. This |
1205 | * thread does not handle any incoming data from UST | |
1206 | * (POLLIN). | |
5eb91c98 | 1207 | */ |
622c9ecf DG |
1208 | ret = lttng_poll_add(&events, ust_cmd.sock, |
1209 | LPOLLERR & LPOLLHUP & LPOLLRDHUP); | |
5eb91c98 DG |
1210 | if (ret < 0) { |
1211 | goto error; | |
1212 | } | |
1213 | ||
ae9e45b3 DG |
1214 | /* Set socket timeout for both receiving and ending */ |
1215 | (void) lttcomm_setsockopt_rcv_timeout(ust_cmd.sock, | |
1216 | app_socket_timeout); | |
1217 | (void) lttcomm_setsockopt_snd_timeout(ust_cmd.sock, | |
1218 | app_socket_timeout); | |
1219 | ||
54d01ffb DG |
1220 | DBG("Apps with sock %d added to poll set", |
1221 | ust_cmd.sock); | |
5eb91c98 | 1222 | } |
487cf67c | 1223 | |
139ac872 | 1224 | health_code_update(&health_thread_app_manage); |
44a5e5eb | 1225 | |
5eb91c98 | 1226 | break; |
0177d773 | 1227 | } |
5eb91c98 DG |
1228 | } else { |
1229 | /* | |
54d01ffb DG |
1230 | * At this point, we know that a registered application made |
1231 | * the event at poll_wait. | |
5eb91c98 DG |
1232 | */ |
1233 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1234 | /* Removing from the poll set */ | |
1235 | ret = lttng_poll_del(&events, pollfd); | |
1236 | if (ret < 0) { | |
1237 | goto error; | |
1238 | } | |
099e26bd | 1239 | |
b9d9b220 | 1240 | /* Socket closed on remote end. */ |
56fff090 | 1241 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1242 | break; |
1243 | } | |
099e26bd | 1244 | } |
44a5e5eb | 1245 | |
139ac872 | 1246 | health_code_update(&health_thread_app_manage); |
099e26bd | 1247 | } |
099e26bd DG |
1248 | } |
1249 | ||
139ac872 | 1250 | exit: |
099e26bd | 1251 | error: |
5eb91c98 | 1252 | lttng_poll_clean(&events); |
76d7553f | 1253 | error_poll_create: |
6620da75 DG |
1254 | utils_close_pipe(apps_cmd_pipe); |
1255 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1256 | ||
1257 | /* | |
1258 | * We don't clean the UST app hash table here since already registered | |
1259 | * applications can still be controlled so let them be until the session | |
1260 | * daemon dies or the applications stop. | |
1261 | */ | |
1262 | ||
139ac872 MD |
1263 | if (err) { |
1264 | health_error(&health_thread_app_manage); | |
1265 | ERR("Health error occurred in %s", __func__); | |
1266 | } | |
1267 | health_exit(&health_thread_app_manage); | |
76d7553f | 1268 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1269 | rcu_thread_offline(); |
1270 | rcu_unregister_thread(); | |
099e26bd DG |
1271 | return NULL; |
1272 | } | |
1273 | ||
1274 | /* | |
1275 | * Dispatch request from the registration threads to the application | |
1276 | * communication thread. | |
1277 | */ | |
1278 | static void *thread_dispatch_ust_registration(void *data) | |
1279 | { | |
1280 | int ret; | |
1281 | struct cds_wfq_node *node; | |
1282 | struct ust_command *ust_cmd = NULL; | |
1283 | ||
1284 | DBG("[thread] Dispatch UST command started"); | |
1285 | ||
26c9d55e | 1286 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1287 | /* Atomically prepare the queue futex */ |
1288 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1289 | ||
1290 | do { | |
1291 | /* Dequeue command for registration */ | |
1292 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1293 | if (node == NULL) { | |
00a17c97 | 1294 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1295 | /* Continue thread execution */ |
1296 | break; | |
1297 | } | |
1298 | ||
1299 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1300 | ||
2f50c8a3 DG |
1301 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1302 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1303 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1304 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1305 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1306 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1307 | /* |
1308 | * Inform apps thread of the new application registration. This | |
1309 | * call is blocking so we can be assured that the data will be read | |
1310 | * at some point in time or wait to the end of the world :) | |
1311 | */ | |
6620da75 DG |
1312 | if (apps_cmd_pipe[1] >= 0) { |
1313 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1314 | sizeof(struct ust_command)); | |
1315 | if (ret < 0) { | |
1316 | PERROR("write apps cmd pipe"); | |
1317 | if (errno == EBADF) { | |
1318 | /* | |
1319 | * We can't inform the application thread to process | |
1320 | * registration. We will exit or else application | |
1321 | * registration will not occur and tracing will never | |
1322 | * start. | |
1323 | */ | |
1324 | goto error; | |
1325 | } | |
1326 | } | |
1327 | } else { | |
1328 | /* Application manager thread is not available. */ | |
1329 | ret = close(ust_cmd->sock); | |
1330 | if (ret < 0) { | |
1331 | PERROR("close ust_cmd sock"); | |
099e26bd DG |
1332 | } |
1333 | } | |
1334 | free(ust_cmd); | |
1335 | } while (node != NULL); | |
1336 | ||
1337 | /* Futex wait on queue. Blocking call on futex() */ | |
1338 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1339 | } | |
1340 | ||
1341 | error: | |
1342 | DBG("Dispatch thread dying"); | |
1343 | return NULL; | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * This thread manage application registration. | |
1348 | */ | |
1349 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1350 | { |
139ac872 | 1351 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1352 | uint32_t revents, nb_fd; |
1353 | struct lttng_poll_event events; | |
099e26bd DG |
1354 | /* |
1355 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1356 | * freed in the manage apps thread. | |
1357 | */ | |
1358 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1359 | |
099e26bd | 1360 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1361 | |
8ac94142 CB |
1362 | testpoint(thread_registration_apps); |
1363 | ||
1d4b027a DG |
1364 | ret = lttcomm_listen_unix_sock(apps_sock); |
1365 | if (ret < 0) { | |
76d7553f | 1366 | goto error_listen; |
1d4b027a DG |
1367 | } |
1368 | ||
5eb91c98 DG |
1369 | /* |
1370 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1371 | * more will be added to this poll set. | |
1372 | */ | |
1373 | ret = create_thread_poll_set(&events, 2); | |
1374 | if (ret < 0) { | |
76d7553f | 1375 | goto error_create_poll; |
5eb91c98 | 1376 | } |
273ea72c | 1377 | |
5eb91c98 DG |
1378 | /* Add the application registration socket */ |
1379 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1380 | if (ret < 0) { | |
76d7553f | 1381 | goto error_poll_add; |
5eb91c98 | 1382 | } |
273ea72c | 1383 | |
1d4b027a | 1384 | /* Notify all applications to register */ |
0fdd1e2c DG |
1385 | ret = notify_ust_apps(1); |
1386 | if (ret < 0) { | |
1387 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1388 | "Execution continues but there might be problem for already\n" |
1389 | "running applications that wishes to register."); | |
0fdd1e2c | 1390 | } |
1d4b027a DG |
1391 | |
1392 | while (1) { | |
1393 | DBG("Accepting application registration"); | |
273ea72c | 1394 | |
5eb91c98 DG |
1395 | nb_fd = LTTNG_POLL_GETNB(&events); |
1396 | ||
273ea72c | 1397 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 1398 | restart: |
139ac872 | 1399 | health_poll_update(&health_thread_app_reg); |
5eb91c98 | 1400 | ret = lttng_poll_wait(&events, -1); |
139ac872 | 1401 | health_poll_update(&health_thread_app_reg); |
273ea72c | 1402 | if (ret < 0) { |
88f2b785 MD |
1403 | /* |
1404 | * Restart interrupted system call. | |
1405 | */ | |
1406 | if (errno == EINTR) { | |
1407 | goto restart; | |
1408 | } | |
273ea72c DG |
1409 | goto error; |
1410 | } | |
1411 | ||
5eb91c98 | 1412 | for (i = 0; i < nb_fd; i++) { |
139ac872 MD |
1413 | health_code_update(&health_thread_app_reg); |
1414 | ||
5eb91c98 DG |
1415 | /* Fetch once the poll data */ |
1416 | revents = LTTNG_POLL_GETEV(&events, i); | |
1417 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1418 | |
5eb91c98 DG |
1419 | /* Thread quit pipe has been closed. Killing thread. */ |
1420 | ret = check_thread_quit_pipe(pollfd, revents); | |
1421 | if (ret) { | |
139ac872 MD |
1422 | err = 0; |
1423 | goto exit; | |
90014c57 | 1424 | } |
1d4b027a | 1425 | |
5eb91c98 DG |
1426 | /* Event on the registration socket */ |
1427 | if (pollfd == apps_sock) { | |
1428 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1429 | ERR("Register apps socket poll error"); | |
1430 | goto error; | |
1431 | } else if (revents & LPOLLIN) { | |
1432 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1433 | if (sock < 0) { | |
1434 | goto error; | |
1435 | } | |
099e26bd | 1436 | |
b662582b DG |
1437 | /* |
1438 | * Set the CLOEXEC flag. Return code is useless because | |
1439 | * either way, the show must go on. | |
1440 | */ | |
1441 | (void) utils_set_fd_cloexec(sock); | |
1442 | ||
5eb91c98 | 1443 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1444 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1445 | if (ust_cmd == NULL) { |
76d7553f | 1446 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1447 | goto error; |
1448 | } | |
1d4b027a | 1449 | |
5eb91c98 DG |
1450 | /* |
1451 | * Using message-based transmissions to ensure we don't | |
1452 | * have to deal with partially received messages. | |
1453 | */ | |
4063050c MD |
1454 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1455 | if (ret < 0) { | |
1456 | ERR("Exhausted file descriptors allowed for applications."); | |
1457 | free(ust_cmd); | |
1458 | ret = close(sock); | |
1459 | if (ret) { | |
1460 | PERROR("close"); | |
1461 | } | |
1462 | sock = -1; | |
1463 | continue; | |
1464 | } | |
139ac872 | 1465 | health_code_update(&health_thread_app_reg); |
5eb91c98 DG |
1466 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1467 | sizeof(struct ust_register_msg)); | |
1468 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1469 | if (ret < 0) { | |
76d7553f | 1470 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1471 | } else { |
1472 | ERR("Wrong size received on apps register"); | |
1473 | } | |
1474 | free(ust_cmd); | |
76d7553f MD |
1475 | ret = close(sock); |
1476 | if (ret) { | |
1477 | PERROR("close"); | |
1478 | } | |
4063050c | 1479 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1480 | sock = -1; |
5eb91c98 DG |
1481 | continue; |
1482 | } | |
139ac872 | 1483 | health_code_update(&health_thread_app_reg); |
099e26bd | 1484 | |
5eb91c98 | 1485 | ust_cmd->sock = sock; |
34a2494f | 1486 | sock = -1; |
099e26bd | 1487 | |
5eb91c98 DG |
1488 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1489 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1490 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1491 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1492 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1493 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1494 | |
5eb91c98 DG |
1495 | /* |
1496 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1497 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1498 | */ |
1499 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1500 | ||
1501 | /* | |
1502 | * Wake the registration queue futex. Implicit memory | |
1503 | * barrier with the exchange in cds_wfq_enqueue. | |
1504 | */ | |
1505 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1506 | } | |
1507 | } | |
90014c57 | 1508 | } |
1d4b027a DG |
1509 | } |
1510 | ||
139ac872 | 1511 | exit: |
1d4b027a | 1512 | error: |
139ac872 MD |
1513 | if (err) { |
1514 | health_error(&health_thread_app_reg); | |
1515 | ERR("Health error occurred in %s", __func__); | |
1516 | } | |
1517 | health_exit(&health_thread_app_reg); | |
1518 | ||
0fdd1e2c DG |
1519 | /* Notify that the registration thread is gone */ |
1520 | notify_ust_apps(0); | |
1521 | ||
a4b35e07 | 1522 | if (apps_sock >= 0) { |
76d7553f MD |
1523 | ret = close(apps_sock); |
1524 | if (ret) { | |
1525 | PERROR("close"); | |
1526 | } | |
a4b35e07 | 1527 | } |
46c3f085 | 1528 | if (sock >= 0) { |
76d7553f MD |
1529 | ret = close(sock); |
1530 | if (ret) { | |
1531 | PERROR("close"); | |
1532 | } | |
4063050c | 1533 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1534 | } |
273ea72c | 1535 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1536 | |
76d7553f | 1537 | error_poll_add: |
5eb91c98 | 1538 | lttng_poll_clean(&events); |
76d7553f MD |
1539 | error_listen: |
1540 | error_create_poll: | |
1541 | DBG("UST Registration thread cleanup complete"); | |
5eb91c98 | 1542 | |
1d4b027a DG |
1543 | return NULL; |
1544 | } | |
1545 | ||
8c0faa1d | 1546 | /* |
3bd1e081 | 1547 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1548 | * exec or it will fails. |
8c0faa1d | 1549 | */ |
3bd1e081 | 1550 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1551 | { |
a23ec3a7 | 1552 | int ret, clock_ret; |
ee0b0061 DG |
1553 | struct timespec timeout; |
1554 | ||
a23ec3a7 DG |
1555 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1556 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1557 | |
a23ec3a7 DG |
1558 | /* Setup pthread condition */ |
1559 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1560 | if (ret != 0) { | |
1561 | errno = ret; | |
1562 | PERROR("pthread_condattr_init consumer data"); | |
1563 | goto error; | |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1568 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1569 | * for a more details and how we noticed it. | |
1570 | */ | |
1571 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1572 | if (ret != 0) { | |
1573 | errno = ret; | |
1574 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1575 | goto error; |
1576 | } | |
8c0faa1d | 1577 | |
a23ec3a7 DG |
1578 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1579 | if (ret != 0) { | |
1580 | errno = ret; | |
1581 | PERROR("pthread_cond_init consumer data"); | |
1582 | goto error; | |
1583 | } | |
1584 | ||
1585 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1586 | consumer_data); | |
8c0faa1d | 1587 | if (ret != 0) { |
3bd1e081 | 1588 | PERROR("pthread_create consumer"); |
ee0b0061 | 1589 | ret = -1; |
8c0faa1d DG |
1590 | goto error; |
1591 | } | |
1592 | ||
a23ec3a7 DG |
1593 | /* We are about to wait on a pthread condition */ |
1594 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1595 | ||
ee0b0061 | 1596 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1597 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1598 | /* | |
1599 | * Set the timeout for the condition timed wait even if the clock gettime | |
1600 | * call fails since we might loop on that call and we want to avoid to | |
1601 | * increment the timeout too many times. | |
1602 | */ | |
1603 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1604 | ||
1605 | /* | |
1606 | * The following loop COULD be skipped in some conditions so this is why we | |
1607 | * set ret to 0 in order to make sure at least one round of the loop is | |
1608 | * done. | |
1609 | */ | |
1610 | ret = 0; | |
1611 | ||
1612 | /* | |
1613 | * Loop until the condition is reached or when a timeout is reached. Note | |
1614 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1615 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1616 | * possible. This loop does not take any chances and works with both of | |
1617 | * them. | |
1618 | */ | |
1619 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1620 | if (clock_ret < 0) { | |
1621 | PERROR("clock_gettime spawn consumer"); | |
1622 | /* Infinite wait for the consumerd thread to be ready */ | |
1623 | ret = pthread_cond_wait(&consumer_data->cond, | |
1624 | &consumer_data->cond_mutex); | |
1625 | } else { | |
1626 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1627 | &consumer_data->cond_mutex, &timeout); | |
1628 | } | |
ee0b0061 | 1629 | } |
8c0faa1d | 1630 | |
a23ec3a7 DG |
1631 | /* Release the pthread condition */ |
1632 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1633 | ||
1634 | if (ret != 0) { | |
1635 | errno = ret; | |
1636 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1637 | /* |
1638 | * Call has timed out so we kill the kconsumerd_thread and return | |
1639 | * an error. | |
1640 | */ | |
a23ec3a7 DG |
1641 | ERR("Condition timed out. The consumer thread was never ready." |
1642 | " Killing it"); | |
3bd1e081 | 1643 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1644 | if (ret < 0) { |
3bd1e081 | 1645 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1646 | } |
1647 | } else { | |
a23ec3a7 | 1648 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1649 | } |
1650 | goto error; | |
1651 | } | |
1652 | ||
3bd1e081 MD |
1653 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1654 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1655 | ERR("Consumerd did not start"); |
3bd1e081 | 1656 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1657 | goto error; |
1658 | } | |
3bd1e081 | 1659 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1660 | |
8c0faa1d DG |
1661 | return 0; |
1662 | ||
1663 | error: | |
1664 | return ret; | |
1665 | } | |
1666 | ||
d9800920 | 1667 | /* |
3bd1e081 | 1668 | * Join consumer thread |
d9800920 | 1669 | */ |
3bd1e081 | 1670 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1671 | { |
1672 | void *status; | |
1673 | int ret; | |
1674 | ||
e8209f6b DG |
1675 | /* Consumer pid must be a real one. */ |
1676 | if (consumer_data->pid > 0) { | |
3bd1e081 | 1677 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1678 | if (ret) { |
3bd1e081 | 1679 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1680 | return ret; |
1681 | } | |
3bd1e081 | 1682 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1683 | } else { |
1684 | return 0; | |
1685 | } | |
1686 | } | |
1687 | ||
8c0faa1d | 1688 | /* |
3bd1e081 | 1689 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1690 | * |
d063d709 | 1691 | * Return pid if successful else -1. |
8c0faa1d | 1692 | */ |
3bd1e081 | 1693 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1694 | { |
1695 | int ret; | |
1696 | pid_t pid; | |
94c55f17 | 1697 | const char *consumer_to_use; |
53086306 | 1698 | const char *verbosity; |
94c55f17 | 1699 | struct stat st; |
8c0faa1d | 1700 | |
3bd1e081 | 1701 | DBG("Spawning consumerd"); |
c49dc785 | 1702 | |
8c0faa1d DG |
1703 | pid = fork(); |
1704 | if (pid == 0) { | |
1705 | /* | |
3bd1e081 | 1706 | * Exec consumerd. |
8c0faa1d | 1707 | */ |
daee5345 | 1708 | if (opt_verbose_consumer) { |
53086306 DG |
1709 | verbosity = "--verbose"; |
1710 | } else { | |
1711 | verbosity = "--quiet"; | |
1712 | } | |
3bd1e081 MD |
1713 | switch (consumer_data->type) { |
1714 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1715 | /* |
c7704d57 DG |
1716 | * Find out which consumerd to execute. We will first try the |
1717 | * 64-bit path, then the sessiond's installation directory, and | |
1718 | * fallback on the 32-bit one, | |
94c55f17 | 1719 | */ |
63a799e8 AM |
1720 | DBG3("Looking for a kernel consumer at these locations:"); |
1721 | DBG3(" 1) %s", consumerd64_bin); | |
1722 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1723 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1724 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1725 | DBG3("Found location #1"); |
94c55f17 | 1726 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1727 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1728 | DBG3("Found location #2"); |
94c55f17 | 1729 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1730 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1731 | DBG3("Found location #3"); |
eb1e0bd4 | 1732 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1733 | } else { |
63a799e8 | 1734 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1735 | break; |
1736 | } | |
1737 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1738 | execl(consumer_to_use, | |
1739 | "lttng-consumerd", verbosity, "-k", | |
1740 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1741 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1742 | NULL); | |
3bd1e081 | 1743 | break; |
7753dea8 MD |
1744 | case LTTNG_CONSUMER64_UST: |
1745 | { | |
b1e0b6b6 | 1746 | char *tmpnew = NULL; |
8f4905da MD |
1747 | |
1748 | if (consumerd64_libdir[0] != '\0') { | |
1749 | char *tmp; | |
1750 | size_t tmplen; | |
1751 | ||
1752 | tmp = getenv("LD_LIBRARY_PATH"); | |
1753 | if (!tmp) { | |
1754 | tmp = ""; | |
1755 | } | |
1756 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1757 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1758 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1759 | if (!tmpnew) { | |
1760 | ret = -ENOMEM; | |
1761 | goto error; | |
1762 | } | |
1763 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1764 | strcat(tmpnew, consumerd64_libdir); | |
1765 | if (tmp[0] != '\0') { | |
1766 | strcat(tmpnew, ":"); | |
1767 | strcat(tmpnew, tmp); | |
1768 | } | |
1769 | ret = putenv(tmpnew); | |
1770 | if (ret) { | |
1771 | ret = -errno; | |
1772 | goto error; | |
1773 | } | |
1774 | } | |
94c55f17 | 1775 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1776 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1777 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1778 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1779 | NULL); | |
8f4905da MD |
1780 | if (consumerd64_libdir[0] != '\0') { |
1781 | free(tmpnew); | |
1782 | } | |
1783 | if (ret) { | |
1784 | goto error; | |
1785 | } | |
3bd1e081 | 1786 | break; |
7753dea8 MD |
1787 | } |
1788 | case LTTNG_CONSUMER32_UST: | |
1789 | { | |
937dde8e | 1790 | char *tmpnew = NULL; |
8f4905da MD |
1791 | |
1792 | if (consumerd32_libdir[0] != '\0') { | |
1793 | char *tmp; | |
1794 | size_t tmplen; | |
1795 | ||
1796 | tmp = getenv("LD_LIBRARY_PATH"); | |
1797 | if (!tmp) { | |
1798 | tmp = ""; | |
1799 | } | |
1800 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1801 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1802 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1803 | if (!tmpnew) { | |
1804 | ret = -ENOMEM; | |
1805 | goto error; | |
1806 | } | |
1807 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1808 | strcat(tmpnew, consumerd32_libdir); | |
1809 | if (tmp[0] != '\0') { | |
1810 | strcat(tmpnew, ":"); | |
1811 | strcat(tmpnew, tmp); | |
1812 | } | |
1813 | ret = putenv(tmpnew); | |
1814 | if (ret) { | |
1815 | ret = -errno; | |
1816 | goto error; | |
1817 | } | |
1818 | } | |
94c55f17 | 1819 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1820 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1821 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1822 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1823 | NULL); | |
8f4905da MD |
1824 | if (consumerd32_libdir[0] != '\0') { |
1825 | free(tmpnew); | |
1826 | } | |
1827 | if (ret) { | |
1828 | goto error; | |
1829 | } | |
7753dea8 MD |
1830 | break; |
1831 | } | |
3bd1e081 | 1832 | default: |
76d7553f | 1833 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1834 | exit(EXIT_FAILURE); |
1835 | } | |
8c0faa1d | 1836 | if (errno != 0) { |
76d7553f | 1837 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1838 | } |
1839 | exit(EXIT_FAILURE); | |
1840 | } else if (pid > 0) { | |
1841 | ret = pid; | |
8c0faa1d | 1842 | } else { |
76d7553f | 1843 | PERROR("start consumer fork"); |
8c0faa1d | 1844 | ret = -errno; |
8c0faa1d | 1845 | } |
8f4905da | 1846 | error: |
8c0faa1d DG |
1847 | return ret; |
1848 | } | |
1849 | ||
693bd40b | 1850 | /* |
3bd1e081 | 1851 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1852 | */ |
3bd1e081 | 1853 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 1854 | { |
edb8b045 DG |
1855 | int ret, err; |
1856 | ||
1857 | /* | |
1858 | * Set the listen() state on the socket since there is a possible race | |
1859 | * between the exec() of the consumer daemon and this call if place in the | |
1860 | * consumer thread. See bug #366 for more details. | |
1861 | */ | |
1862 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
1863 | if (ret < 0) { | |
1864 | goto error; | |
1865 | } | |
693bd40b | 1866 | |
3bd1e081 MD |
1867 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1868 | if (consumer_data->pid != 0) { | |
1869 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1870 | goto end; |
1871 | } | |
693bd40b | 1872 | |
3bd1e081 | 1873 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1874 | if (ret < 0) { |
3bd1e081 MD |
1875 | ERR("Spawning consumerd failed"); |
1876 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1877 | goto error; |
693bd40b | 1878 | } |
c49dc785 | 1879 | |
3bd1e081 MD |
1880 | /* Setting up the consumer_data pid */ |
1881 | consumer_data->pid = ret; | |
48842b30 | 1882 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1883 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1884 | |
3bd1e081 MD |
1885 | DBG2("Spawning consumer control thread"); |
1886 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1887 | if (ret < 0) { |
3bd1e081 | 1888 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1889 | goto error; |
1890 | } | |
1891 | ||
c49dc785 | 1892 | end: |
693bd40b DG |
1893 | return 0; |
1894 | ||
1895 | error: | |
edb8b045 DG |
1896 | /* Cleanup already created socket on error. */ |
1897 | if (consumer_data->err_sock >= 0) { | |
1898 | err = close(consumer_data->err_sock); | |
1899 | if (err < 0) { | |
1900 | PERROR("close consumer data error socket"); | |
1901 | } | |
1902 | } | |
693bd40b DG |
1903 | return ret; |
1904 | } | |
1905 | ||
44a5e5eb | 1906 | /* |
139ac872 MD |
1907 | * Compute health status of each consumer. If one of them is zero (bad |
1908 | * state), we return 0. | |
44a5e5eb DG |
1909 | */ |
1910 | static int check_consumer_health(void) | |
1911 | { | |
1912 | int ret; | |
1913 | ||
139ac872 MD |
1914 | ret = health_check_state(&kconsumer_data.health) && |
1915 | health_check_state(&ustconsumer32_data.health) && | |
44a5e5eb DG |
1916 | health_check_state(&ustconsumer64_data.health); |
1917 | ||
1918 | DBG3("Health consumer check %d", ret); | |
1919 | ||
1920 | return ret; | |
1921 | } | |
1922 | ||
b73401da | 1923 | /* |
096102bd | 1924 | * Setup necessary data for kernel tracer action. |
b73401da | 1925 | */ |
096102bd | 1926 | static int init_kernel_tracer(void) |
b73401da DG |
1927 | { |
1928 | int ret; | |
b73401da | 1929 | |
096102bd DG |
1930 | /* Modprobe lttng kernel modules */ |
1931 | ret = modprobe_lttng_control(); | |
b73401da | 1932 | if (ret < 0) { |
b73401da DG |
1933 | goto error; |
1934 | } | |
1935 | ||
096102bd DG |
1936 | /* Open debugfs lttng */ |
1937 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1938 | if (kernel_tracer_fd < 0) { | |
1939 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
1940 | ret = -1; |
1941 | goto error_open; | |
54d01ffb DG |
1942 | } |
1943 | ||
2f77fc4b DG |
1944 | /* Validate kernel version */ |
1945 | ret = kernel_validate_version(kernel_tracer_fd); | |
1946 | if (ret < 0) { | |
1947 | goto error_version; | |
b551a063 | 1948 | } |
54d01ffb | 1949 | |
2f77fc4b DG |
1950 | ret = modprobe_lttng_data(); |
1951 | if (ret < 0) { | |
1952 | goto error_modules; | |
54d01ffb DG |
1953 | } |
1954 | ||
2f77fc4b DG |
1955 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1956 | return 0; | |
1957 | ||
1958 | error_version: | |
1959 | modprobe_remove_lttng_control(); | |
1960 | ret = close(kernel_tracer_fd); | |
1961 | if (ret) { | |
1962 | PERROR("close"); | |
b551a063 | 1963 | } |
2f77fc4b | 1964 | kernel_tracer_fd = -1; |
f73fabfd | 1965 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1966 | |
2f77fc4b DG |
1967 | error_modules: |
1968 | ret = close(kernel_tracer_fd); | |
1969 | if (ret) { | |
1970 | PERROR("close"); | |
b551a063 | 1971 | } |
54d01ffb | 1972 | |
2f77fc4b DG |
1973 | error_open: |
1974 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1975 | |
1976 | error: | |
2f77fc4b DG |
1977 | WARN("No kernel tracer available"); |
1978 | kernel_tracer_fd = -1; | |
1979 | if (!is_root) { | |
f73fabfd | 1980 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1981 | } else { |
f73fabfd | 1982 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1983 | } |
54d01ffb DG |
1984 | } |
1985 | ||
2f77fc4b | 1986 | |
54d01ffb | 1987 | /* |
2f77fc4b DG |
1988 | * Copy consumer output from the tracing session to the domain session. The |
1989 | * function also applies the right modification on a per domain basis for the | |
1990 | * trace files destination directory. | |
54d01ffb | 1991 | */ |
2f77fc4b | 1992 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
1993 | { |
1994 | int ret; | |
2f77fc4b DG |
1995 | const char *dir_name; |
1996 | struct consumer_output *consumer; | |
1997 | ||
1998 | assert(session); | |
1999 | assert(session->consumer); | |
54d01ffb | 2000 | |
b551a063 DG |
2001 | switch (domain) { |
2002 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2003 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2004 | /* |
2005 | * XXX: We should audit the session creation and what this function | |
2006 | * does "extra" in order to avoid a destroy since this function is used | |
2007 | * in the domain session creation (kernel and ust) only. Same for UST | |
2008 | * domain. | |
2009 | */ | |
2010 | if (session->kernel_session->consumer) { | |
2011 | consumer_destroy_output(session->kernel_session->consumer); | |
2012 | } | |
2f77fc4b DG |
2013 | session->kernel_session->consumer = |
2014 | consumer_copy_output(session->consumer); | |
2015 | /* Ease our life a bit for the next part */ | |
2016 | consumer = session->kernel_session->consumer; | |
2017 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2018 | break; |
2019 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2020 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2021 | if (session->ust_session->consumer) { |
2022 | consumer_destroy_output(session->ust_session->consumer); | |
2023 | } | |
2f77fc4b DG |
2024 | session->ust_session->consumer = |
2025 | consumer_copy_output(session->consumer); | |
2026 | /* Ease our life a bit for the next part */ | |
2027 | consumer = session->ust_session->consumer; | |
2028 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2029 | break; |
2030 | default: | |
f73fabfd | 2031 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2032 | goto error; |
2033 | } | |
2034 | ||
2f77fc4b | 2035 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2036 | strncat(consumer->subdir, dir_name, |
2037 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2038 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2039 | ||
f73fabfd | 2040 | ret = LTTNG_OK; |
54d01ffb DG |
2041 | |
2042 | error: | |
2043 | return ret; | |
2044 | } | |
2045 | ||
00e2e675 | 2046 | /* |
2f77fc4b | 2047 | * Create an UST session and add it to the session ust list. |
00e2e675 | 2048 | */ |
2f77fc4b DG |
2049 | static int create_ust_session(struct ltt_session *session, |
2050 | struct lttng_domain *domain) | |
00e2e675 DG |
2051 | { |
2052 | int ret; | |
2f77fc4b | 2053 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2054 | |
a4b92340 | 2055 | assert(session); |
2f77fc4b DG |
2056 | assert(domain); |
2057 | assert(session->consumer); | |
a4b92340 | 2058 | |
2f77fc4b DG |
2059 | switch (domain->type) { |
2060 | case LTTNG_DOMAIN_UST: | |
2061 | break; | |
2062 | default: | |
2063 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2064 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2065 | goto error; |
2066 | } | |
2067 | ||
2f77fc4b DG |
2068 | DBG("Creating UST session"); |
2069 | ||
2070 | lus = trace_ust_create_session(session->path, session->id, domain); | |
2071 | if (lus == NULL) { | |
f73fabfd | 2072 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2073 | goto error; |
2074 | } | |
2075 | ||
2f77fc4b DG |
2076 | lus->uid = session->uid; |
2077 | lus->gid = session->gid; | |
2078 | session->ust_session = lus; | |
00e2e675 | 2079 | |
2f77fc4b DG |
2080 | /* Copy session output to the newly created UST session */ |
2081 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2082 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2083 | goto error; |
2084 | } | |
2085 | ||
f73fabfd | 2086 | return LTTNG_OK; |
00e2e675 DG |
2087 | |
2088 | error: | |
2f77fc4b DG |
2089 | free(lus); |
2090 | session->ust_session = NULL; | |
00e2e675 DG |
2091 | return ret; |
2092 | } | |
2093 | ||
2094 | /* | |
2f77fc4b | 2095 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2096 | */ |
2f77fc4b | 2097 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2098 | { |
2099 | int ret; | |
a4b92340 | 2100 | |
2f77fc4b | 2101 | DBG("Creating kernel session"); |
00e2e675 | 2102 | |
2f77fc4b DG |
2103 | ret = kernel_create_session(session, kernel_tracer_fd); |
2104 | if (ret < 0) { | |
f73fabfd | 2105 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2106 | goto error; |
2107 | } | |
2108 | ||
2f77fc4b DG |
2109 | /* Code flow safety */ |
2110 | assert(session->kernel_session); | |
2111 | ||
2112 | /* Copy session output to the newly created Kernel session */ | |
2113 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2114 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2115 | goto error; |
2116 | } | |
2117 | ||
2f77fc4b DG |
2118 | /* Create directory(ies) on local filesystem. */ |
2119 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2120 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2121 | ret = run_as_mkdir_recursive( | |
2122 | session->kernel_session->consumer->dst.trace_path, | |
2123 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2124 | if (ret < 0) { | |
2125 | if (ret != -EEXIST) { | |
2126 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2127 | goto error; |
2128 | } | |
00e2e675 | 2129 | } |
2f77fc4b | 2130 | } |
00e2e675 | 2131 | |
2f77fc4b DG |
2132 | session->kernel_session->uid = session->uid; |
2133 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2134 | |
f73fabfd | 2135 | return LTTNG_OK; |
00e2e675 | 2136 | |
2f77fc4b DG |
2137 | error: |
2138 | trace_kernel_destroy_session(session->kernel_session); | |
2139 | session->kernel_session = NULL; | |
2140 | return ret; | |
2141 | } | |
00e2e675 | 2142 | |
2f77fc4b DG |
2143 | /* |
2144 | * Count number of session permitted by uid/gid. | |
2145 | */ | |
2146 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2147 | { | |
2148 | unsigned int i = 0; | |
2149 | struct ltt_session *session; | |
07424f16 | 2150 | |
2f77fc4b DG |
2151 | DBG("Counting number of available session for UID %d GID %d", |
2152 | uid, gid); | |
2153 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2154 | /* |
2f77fc4b | 2155 | * Only list the sessions the user can control. |
00e2e675 | 2156 | */ |
2f77fc4b DG |
2157 | if (!session_access_ok(session, uid, gid)) { |
2158 | continue; | |
2159 | } | |
2160 | i++; | |
a4b92340 | 2161 | } |
2f77fc4b | 2162 | return i; |
00e2e675 DG |
2163 | } |
2164 | ||
54d01ffb DG |
2165 | /* |
2166 | * Process the command requested by the lttng client within the command | |
2167 | * context structure. This function make sure that the return structure (llm) | |
2168 | * is set and ready for transmission before returning. | |
2169 | * | |
2170 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2171 | * |
2172 | * "sock" is only used for special-case var. len data. | |
54d01ffb | 2173 | */ |
53a80697 MD |
2174 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2175 | int *sock_error) | |
54d01ffb | 2176 | { |
f73fabfd | 2177 | int ret = LTTNG_OK; |
44d3bd01 | 2178 | int need_tracing_session = 1; |
2e09ba09 | 2179 | int need_domain; |
54d01ffb DG |
2180 | |
2181 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2182 | ||
53a80697 MD |
2183 | *sock_error = 0; |
2184 | ||
2e09ba09 MD |
2185 | switch (cmd_ctx->lsm->cmd_type) { |
2186 | case LTTNG_CREATE_SESSION: | |
2187 | case LTTNG_DESTROY_SESSION: | |
2188 | case LTTNG_LIST_SESSIONS: | |
2189 | case LTTNG_LIST_DOMAINS: | |
2190 | case LTTNG_START_TRACE: | |
2191 | case LTTNG_STOP_TRACE: | |
6d805429 | 2192 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2193 | need_domain = 0; |
3aace903 | 2194 | break; |
2e09ba09 MD |
2195 | default: |
2196 | need_domain = 1; | |
2197 | } | |
2198 | ||
2199 | if (opt_no_kernel && need_domain | |
2200 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2201 | if (!is_root) { |
f73fabfd | 2202 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2203 | } else { |
f73fabfd | 2204 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2205 | } |
4fba7219 DG |
2206 | goto error; |
2207 | } | |
2208 | ||
8d3113b2 DG |
2209 | /* Deny register consumer if we already have a spawned consumer. */ |
2210 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2211 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2212 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2213 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2214 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2215 | goto error; |
2216 | } | |
2217 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2218 | } | |
2219 | ||
54d01ffb DG |
2220 | /* |
2221 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2222 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2223 | * command. |
2224 | */ | |
2225 | switch(cmd_ctx->lsm->cmd_type) { | |
2226 | case LTTNG_LIST_SESSIONS: | |
2227 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2228 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2229 | case LTTNG_LIST_DOMAINS: |
2230 | case LTTNG_LIST_CHANNELS: | |
2231 | case LTTNG_LIST_EVENTS: | |
2232 | break; | |
2233 | default: | |
2234 | /* Setup lttng message with no payload */ | |
2235 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2236 | if (ret < 0) { | |
2237 | /* This label does not try to unlock the session */ | |
2238 | goto init_setup_error; | |
2239 | } | |
2240 | } | |
2241 | ||
2242 | /* Commands that DO NOT need a session. */ | |
2243 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2244 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2245 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2246 | case LTTNG_LIST_SESSIONS: |
2247 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2248 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2249 | need_tracing_session = 0; |
54d01ffb DG |
2250 | break; |
2251 | default: | |
2252 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2253 | /* |
2254 | * We keep the session list lock across _all_ commands | |
2255 | * for now, because the per-session lock does not | |
2256 | * handle teardown properly. | |
2257 | */ | |
74babd95 | 2258 | session_lock_list(); |
54d01ffb DG |
2259 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2260 | if (cmd_ctx->session == NULL) { | |
2261 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2262 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2263 | } else { |
2264 | /* If no session name specified */ | |
f73fabfd | 2265 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2266 | } |
2267 | goto error; | |
2268 | } else { | |
2269 | /* Acquire lock for the session */ | |
2270 | session_lock(cmd_ctx->session); | |
2271 | } | |
2272 | break; | |
2273 | } | |
b389abbe | 2274 | |
2e09ba09 MD |
2275 | if (!need_domain) { |
2276 | goto skip_domain; | |
2277 | } | |
a4b92340 | 2278 | |
54d01ffb DG |
2279 | /* |
2280 | * Check domain type for specific "pre-action". | |
2281 | */ | |
2282 | switch (cmd_ctx->lsm->domain.type) { | |
2283 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2284 | if (!is_root) { |
f73fabfd | 2285 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2286 | goto error; |
2287 | } | |
2288 | ||
54d01ffb | 2289 | /* Kernel tracer check */ |
a4b35e07 | 2290 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2291 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2292 | ret = init_kernel_tracer(); |
2293 | if (ret != 0) { | |
54d01ffb DG |
2294 | goto error; |
2295 | } | |
2296 | } | |
5eb91c98 | 2297 | |
5c827ce0 DG |
2298 | /* Consumer is in an ERROR state. Report back to client */ |
2299 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2300 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2301 | goto error; |
2302 | } | |
2303 | ||
54d01ffb | 2304 | /* Need a session for kernel command */ |
44d3bd01 | 2305 | if (need_tracing_session) { |
54d01ffb | 2306 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2307 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2308 | if (ret < 0) { |
f73fabfd | 2309 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2310 | goto error; |
2311 | } | |
b389abbe | 2312 | } |
7d29a247 | 2313 | |
54d01ffb | 2314 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2315 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2316 | if (kconsumer_data.pid == 0 && | |
a4b92340 DG |
2317 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2318 | cmd_ctx->session->start_consumer) { | |
3bd1e081 MD |
2319 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2320 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2321 | if (ret < 0) { |
f73fabfd | 2322 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2323 | goto error; |
950131af | 2324 | } |
5c827ce0 | 2325 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2326 | } else { |
2327 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2328 | } |
173af62f | 2329 | |
a4b92340 DG |
2330 | /* |
2331 | * The consumer was just spawned so we need to add the socket to | |
2332 | * the consumer output of the session if exist. | |
2333 | */ | |
2334 | ret = consumer_create_socket(&kconsumer_data, | |
2335 | cmd_ctx->session->kernel_session->consumer); | |
2336 | if (ret < 0) { | |
2337 | goto error; | |
173af62f | 2338 | } |
0d0c377a | 2339 | } |
5c827ce0 | 2340 | |
54d01ffb | 2341 | break; |
2bdd86d4 | 2342 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2343 | { |
5c827ce0 DG |
2344 | /* Consumer is in an ERROR state. Report back to client */ |
2345 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2346 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2347 | goto error; |
2348 | } | |
2349 | ||
44d3bd01 | 2350 | if (need_tracing_session) { |
a4b92340 | 2351 | /* Create UST session if none exist. */ |
f6a9efaa | 2352 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2353 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2354 | &cmd_ctx->lsm->domain); |
f73fabfd | 2355 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2356 | goto error; |
2357 | } | |
2358 | } | |
00e2e675 | 2359 | |
7753dea8 MD |
2360 | /* Start the UST consumer daemons */ |
2361 | /* 64-bit */ | |
2362 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2363 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2364 | ustconsumer64_data.pid == 0 && |
a4b92340 DG |
2365 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2366 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2367 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2368 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2369 | if (ret < 0) { |
f73fabfd | 2370 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2371 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2372 | goto error; |
2373 | } | |
48842b30 | 2374 | |
173af62f | 2375 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2376 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2377 | } else { |
7753dea8 MD |
2378 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2379 | } | |
173af62f DG |
2380 | |
2381 | /* | |
2382 | * Setup socket for consumer 64 bit. No need for atomic access | |
2383 | * since it was set above and can ONLY be set in this thread. | |
2384 | */ | |
a4b92340 DG |
2385 | ret = consumer_create_socket(&ustconsumer64_data, |
2386 | cmd_ctx->session->ust_session->consumer); | |
2387 | if (ret < 0) { | |
2388 | goto error; | |
173af62f DG |
2389 | } |
2390 | ||
7753dea8 | 2391 | /* 32-bit */ |
fc7a59ce | 2392 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2393 | ustconsumer32_data.pid == 0 && |
a4b92340 DG |
2394 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2395 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2396 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2397 | ret = start_consumerd(&ustconsumer32_data); | |
2398 | if (ret < 0) { | |
f73fabfd | 2399 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2400 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2401 | goto error; |
2402 | } | |
5c827ce0 | 2403 | |
173af62f | 2404 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2405 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2406 | } else { |
2407 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2408 | } |
173af62f DG |
2409 | |
2410 | /* | |
2411 | * Setup socket for consumer 64 bit. No need for atomic access | |
2412 | * since it was set above and can ONLY be set in this thread. | |
2413 | */ | |
a4b92340 DG |
2414 | ret = consumer_create_socket(&ustconsumer32_data, |
2415 | cmd_ctx->session->ust_session->consumer); | |
2416 | if (ret < 0) { | |
2417 | goto error; | |
173af62f | 2418 | } |
44d3bd01 DG |
2419 | } |
2420 | break; | |
48842b30 | 2421 | } |
54d01ffb | 2422 | default: |
54d01ffb DG |
2423 | break; |
2424 | } | |
2e09ba09 | 2425 | skip_domain: |
33a2b854 | 2426 | |
5c827ce0 DG |
2427 | /* Validate consumer daemon state when start/stop trace command */ |
2428 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2429 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2430 | switch (cmd_ctx->lsm->domain.type) { | |
2431 | case LTTNG_DOMAIN_UST: | |
2432 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2433 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2434 | goto error; |
2435 | } | |
2436 | break; | |
2437 | case LTTNG_DOMAIN_KERNEL: | |
2438 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2439 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2440 | goto error; |
2441 | } | |
2442 | break; | |
2443 | } | |
2444 | } | |
2445 | ||
8e0af1b4 MD |
2446 | /* |
2447 | * Check that the UID or GID match that of the tracing session. | |
2448 | * The root user can interact with all sessions. | |
2449 | */ | |
2450 | if (need_tracing_session) { | |
2451 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2452 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2453 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2454 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2455 | goto error; |
2456 | } | |
2457 | } | |
2458 | ||
54d01ffb DG |
2459 | /* Process by command type */ |
2460 | switch (cmd_ctx->lsm->cmd_type) { | |
2461 | case LTTNG_ADD_CONTEXT: | |
2462 | { | |
2463 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2464 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2465 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2466 | break; |
2467 | } | |
2468 | case LTTNG_DISABLE_CHANNEL: | |
2469 | { | |
2470 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2471 | cmd_ctx->lsm->u.disable.channel_name); | |
2472 | break; | |
2473 | } | |
2474 | case LTTNG_DISABLE_EVENT: | |
2475 | { | |
2476 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2477 | cmd_ctx->lsm->u.disable.channel_name, | |
2478 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2479 | break; |
2480 | } | |
54d01ffb DG |
2481 | case LTTNG_DISABLE_ALL_EVENT: |
2482 | { | |
2bdd86d4 | 2483 | DBG("Disabling all events"); |
54d01ffb DG |
2484 | |
2485 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2486 | cmd_ctx->lsm->u.disable.channel_name); | |
2487 | break; | |
2488 | } | |
00e2e675 DG |
2489 | case LTTNG_DISABLE_CONSUMER: |
2490 | { | |
2491 | ret = cmd_disable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); | |
2492 | break; | |
2493 | } | |
54d01ffb DG |
2494 | case LTTNG_ENABLE_CHANNEL: |
2495 | { | |
aea829b3 | 2496 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2497 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2498 | break; |
2499 | } | |
00e2e675 DG |
2500 | case LTTNG_ENABLE_CONSUMER: |
2501 | { | |
a4b92340 DG |
2502 | /* |
2503 | * XXX: 0 means that this URI should be applied on the session. Should | |
2504 | * be a DOMAIN enuam. | |
2505 | */ | |
00e2e675 | 2506 | ret = cmd_enable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); |
f73fabfd | 2507 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2508 | goto error; |
2509 | } | |
2510 | ||
2511 | if (cmd_ctx->lsm->domain.type == 0) { | |
2512 | /* Add the URI for the UST session if a consumer is present. */ | |
2513 | if (cmd_ctx->session->ust_session && | |
2514 | cmd_ctx->session->ust_session->consumer) { | |
2515 | ret = cmd_enable_consumer(LTTNG_DOMAIN_UST, cmd_ctx->session); | |
2516 | } else if (cmd_ctx->session->kernel_session && | |
2517 | cmd_ctx->session->kernel_session->consumer) { | |
2518 | ret = cmd_enable_consumer(LTTNG_DOMAIN_KERNEL, | |
2519 | cmd_ctx->session); | |
2520 | } | |
2521 | } | |
00e2e675 DG |
2522 | break; |
2523 | } | |
54d01ffb DG |
2524 | case LTTNG_ENABLE_EVENT: |
2525 | { | |
2526 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2527 | cmd_ctx->lsm->u.enable.channel_name, | |
2f77fc4b | 2528 | &cmd_ctx->lsm->u.enable.event, kernel_poll_pipe[1]); |
54d01ffb DG |
2529 | break; |
2530 | } | |
2531 | case LTTNG_ENABLE_ALL_EVENT: | |
2532 | { | |
2bdd86d4 | 2533 | DBG("Enabling all events"); |
54d01ffb DG |
2534 | |
2535 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 | 2536 | cmd_ctx->lsm->u.enable.channel_name, |
2f77fc4b | 2537 | cmd_ctx->lsm->u.enable.event.type, kernel_poll_pipe[1]); |
54d01ffb DG |
2538 | break; |
2539 | } | |
052da939 | 2540 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2541 | { |
9f19cc17 | 2542 | struct lttng_event *events; |
54d01ffb | 2543 | ssize_t nb_events; |
052da939 | 2544 | |
54d01ffb DG |
2545 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2546 | if (nb_events < 0) { | |
f73fabfd | 2547 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2548 | ret = -nb_events; |
2549 | goto error; | |
2ef84c95 DG |
2550 | } |
2551 | ||
2552 | /* | |
2553 | * Setup lttng message with payload size set to the event list size in | |
2554 | * bytes and then copy list into the llm payload. | |
2555 | */ | |
052da939 | 2556 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2557 | if (ret < 0) { |
052da939 | 2558 | free(events); |
2ef84c95 DG |
2559 | goto setup_error; |
2560 | } | |
2561 | ||
2562 | /* Copy event list into message payload */ | |
9f19cc17 | 2563 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2564 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2565 | |
9f19cc17 | 2566 | free(events); |
2ef84c95 | 2567 | |
f73fabfd | 2568 | ret = LTTNG_OK; |
2ef84c95 DG |
2569 | break; |
2570 | } | |
f37d259d MD |
2571 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2572 | { | |
2573 | struct lttng_event_field *fields; | |
2574 | ssize_t nb_fields; | |
2575 | ||
a4b92340 DG |
2576 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2577 | &fields); | |
f37d259d | 2578 | if (nb_fields < 0) { |
f73fabfd | 2579 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2580 | ret = -nb_fields; |
2581 | goto error; | |
2582 | } | |
2583 | ||
2584 | /* | |
2585 | * Setup lttng message with payload size set to the event list size in | |
2586 | * bytes and then copy list into the llm payload. | |
2587 | */ | |
a4b92340 DG |
2588 | ret = setup_lttng_msg(cmd_ctx, |
2589 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2590 | if (ret < 0) { |
2591 | free(fields); | |
2592 | goto setup_error; | |
2593 | } | |
2594 | ||
2595 | /* Copy event list into message payload */ | |
2596 | memcpy(cmd_ctx->llm->payload, fields, | |
2597 | sizeof(struct lttng_event_field) * nb_fields); | |
2598 | ||
2599 | free(fields); | |
2600 | ||
f73fabfd | 2601 | ret = LTTNG_OK; |
f37d259d MD |
2602 | break; |
2603 | } | |
00e2e675 DG |
2604 | case LTTNG_SET_CONSUMER_URI: |
2605 | { | |
a4b92340 DG |
2606 | size_t nb_uri, len; |
2607 | struct lttng_uri *uris; | |
2608 | ||
2609 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2610 | len = nb_uri * sizeof(struct lttng_uri); | |
2611 | ||
2612 | if (nb_uri == 0) { | |
f73fabfd | 2613 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2614 | goto error; |
2615 | } | |
2616 | ||
2617 | uris = zmalloc(len); | |
2618 | if (uris == NULL) { | |
f73fabfd | 2619 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2620 | goto error; |
2621 | } | |
2622 | ||
2623 | /* Receive variable len data */ | |
77c7c900 | 2624 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2625 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2626 | if (ret <= 0) { | |
2627 | DBG("No URIs received from client... continuing"); | |
2628 | *sock_error = 1; | |
f73fabfd | 2629 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2630 | free(uris); |
a4b92340 DG |
2631 | goto error; |
2632 | } | |
2633 | ||
00e2e675 | 2634 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2635 | nb_uri, uris); |
f73fabfd | 2636 | if (ret != LTTNG_OK) { |
b1d41407 | 2637 | free(uris); |
a4b92340 DG |
2638 | goto error; |
2639 | } | |
2640 | ||
2641 | /* | |
2642 | * XXX: 0 means that this URI should be applied on the session. Should | |
2643 | * be a DOMAIN enuam. | |
2644 | */ | |
2645 | if (cmd_ctx->lsm->domain.type == 0) { | |
2646 | /* Add the URI for the UST session if a consumer is present. */ | |
2647 | if (cmd_ctx->session->ust_session && | |
2648 | cmd_ctx->session->ust_session->consumer) { | |
2649 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2650 | nb_uri, uris); | |
2651 | } else if (cmd_ctx->session->kernel_session && | |
2652 | cmd_ctx->session->kernel_session->consumer) { | |
2653 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2654 | cmd_ctx->session, nb_uri, uris); | |
2655 | } | |
2656 | } | |
2657 | ||
b1d41407 DG |
2658 | free(uris); |
2659 | ||
00e2e675 DG |
2660 | break; |
2661 | } | |
f3ed775e | 2662 | case LTTNG_START_TRACE: |
8c0faa1d | 2663 | { |
54d01ffb | 2664 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2665 | break; |
2666 | } | |
f3ed775e | 2667 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2668 | { |
54d01ffb | 2669 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2670 | break; |
2671 | } | |
5e16da05 MD |
2672 | case LTTNG_CREATE_SESSION: |
2673 | { | |
a4b92340 DG |
2674 | size_t nb_uri, len; |
2675 | struct lttng_uri *uris = NULL; | |
2676 | ||
2677 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2678 | len = nb_uri * sizeof(struct lttng_uri); | |
2679 | ||
2680 | if (nb_uri > 0) { | |
2681 | uris = zmalloc(len); | |
2682 | if (uris == NULL) { | |
f73fabfd | 2683 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2684 | goto error; |
2685 | } | |
2686 | ||
2687 | /* Receive variable len data */ | |
77c7c900 | 2688 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2689 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2690 | if (ret <= 0) { | |
2691 | DBG("No URIs received from client... continuing"); | |
2692 | *sock_error = 1; | |
f73fabfd | 2693 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2694 | free(uris); |
a4b92340 DG |
2695 | goto error; |
2696 | } | |
2697 | ||
2698 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2699 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2700 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2701 | free(uris); |
a4b92340 DG |
2702 | goto error; |
2703 | } | |
2704 | } | |
2705 | ||
2706 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2707 | &cmd_ctx->creds); | |
2708 | ||
b1d41407 DG |
2709 | free(uris); |
2710 | ||
00e2e675 DG |
2711 | break; |
2712 | } | |
5e16da05 MD |
2713 | case LTTNG_DESTROY_SESSION: |
2714 | { | |
2f77fc4b | 2715 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2716 | |
2717 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2718 | cmd_ctx->session = NULL; |
5461b305 | 2719 | break; |
5e16da05 | 2720 | } |
9f19cc17 | 2721 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2722 | { |
54d01ffb DG |
2723 | ssize_t nb_dom; |
2724 | struct lttng_domain *domains; | |
5461b305 | 2725 | |
54d01ffb DG |
2726 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2727 | if (nb_dom < 0) { | |
f73fabfd | 2728 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2729 | ret = -nb_dom; |
2730 | goto error; | |
ce3d728c | 2731 | } |
520ff687 | 2732 | |
54d01ffb | 2733 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
2734 | if (ret < 0) { |
2735 | goto setup_error; | |
520ff687 | 2736 | } |
57167058 | 2737 | |
54d01ffb DG |
2738 | /* Copy event list into message payload */ |
2739 | memcpy(cmd_ctx->llm->payload, domains, | |
2740 | nb_dom * sizeof(struct lttng_domain)); | |
2741 | ||
2742 | free(domains); | |
5e16da05 | 2743 | |
f73fabfd | 2744 | ret = LTTNG_OK; |
5e16da05 MD |
2745 | break; |
2746 | } | |
9f19cc17 | 2747 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2748 | { |
6775595e | 2749 | int nb_chan; |
54d01ffb DG |
2750 | struct lttng_channel *channels; |
2751 | ||
b551a063 DG |
2752 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2753 | cmd_ctx->session, &channels); | |
54d01ffb | 2754 | if (nb_chan < 0) { |
f73fabfd | 2755 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2756 | ret = -nb_chan; |
2757 | goto error; | |
5461b305 | 2758 | } |
ca95a216 | 2759 | |
54d01ffb | 2760 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
2761 | if (ret < 0) { |
2762 | goto setup_error; | |
2763 | } | |
9f19cc17 | 2764 | |
54d01ffb DG |
2765 | /* Copy event list into message payload */ |
2766 | memcpy(cmd_ctx->llm->payload, channels, | |
2767 | nb_chan * sizeof(struct lttng_channel)); | |
2768 | ||
2769 | free(channels); | |
9f19cc17 | 2770 | |
f73fabfd | 2771 | ret = LTTNG_OK; |
5461b305 | 2772 | break; |
5e16da05 | 2773 | } |
9f19cc17 | 2774 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2775 | { |
b551a063 | 2776 | ssize_t nb_event; |
684d34d2 | 2777 | struct lttng_event *events = NULL; |
9f19cc17 | 2778 | |
b551a063 | 2779 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2780 | cmd_ctx->lsm->u.list.channel_name, &events); |
2781 | if (nb_event < 0) { | |
f73fabfd | 2782 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2783 | ret = -nb_event; |
2784 | goto error; | |
5461b305 | 2785 | } |
ca95a216 | 2786 | |
54d01ffb | 2787 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
2788 | if (ret < 0) { |
2789 | goto setup_error; | |
2790 | } | |
9f19cc17 | 2791 | |
54d01ffb DG |
2792 | /* Copy event list into message payload */ |
2793 | memcpy(cmd_ctx->llm->payload, events, | |
2794 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2795 | |
54d01ffb | 2796 | free(events); |
9f19cc17 | 2797 | |
f73fabfd | 2798 | ret = LTTNG_OK; |
5461b305 | 2799 | break; |
5e16da05 MD |
2800 | } |
2801 | case LTTNG_LIST_SESSIONS: | |
2802 | { | |
8e0af1b4 | 2803 | unsigned int nr_sessions; |
5461b305 | 2804 | |
8e0af1b4 | 2805 | session_lock_list(); |
730389d9 DG |
2806 | nr_sessions = lttng_sessions_count( |
2807 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
2808 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 2809 | |
8e0af1b4 | 2810 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 2811 | if (ret < 0) { |
54d01ffb | 2812 | session_unlock_list(); |
5461b305 | 2813 | goto setup_error; |
e065084a | 2814 | } |
5e16da05 | 2815 | |
6c9cc2ab | 2816 | /* Filled the session array */ |
2f77fc4b | 2817 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
2818 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2819 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 2820 | |
54d01ffb | 2821 | session_unlock_list(); |
5e16da05 | 2822 | |
f73fabfd | 2823 | ret = LTTNG_OK; |
5e16da05 MD |
2824 | break; |
2825 | } | |
d0254c7c MD |
2826 | case LTTNG_CALIBRATE: |
2827 | { | |
54d01ffb DG |
2828 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
2829 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
2830 | break; |
2831 | } | |
d9800920 DG |
2832 | case LTTNG_REGISTER_CONSUMER: |
2833 | { | |
2f77fc4b DG |
2834 | struct consumer_data *cdata; |
2835 | ||
2836 | switch (cmd_ctx->lsm->domain.type) { | |
2837 | case LTTNG_DOMAIN_KERNEL: | |
2838 | cdata = &kconsumer_data; | |
2839 | break; | |
2840 | default: | |
f73fabfd | 2841 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2842 | goto error; |
2843 | } | |
2844 | ||
54d01ffb | 2845 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2846 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
2847 | break; |
2848 | } | |
53a80697 MD |
2849 | case LTTNG_SET_FILTER: |
2850 | { | |
2851 | struct lttng_filter_bytecode *bytecode; | |
2852 | ||
d93c4f1f | 2853 | if (cmd_ctx->lsm->u.filter.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 2854 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2855 | goto error; |
2856 | } | |
2857 | bytecode = zmalloc(cmd_ctx->lsm->u.filter.bytecode_len); | |
2858 | if (!bytecode) { | |
f73fabfd | 2859 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
2860 | goto error; |
2861 | } | |
2862 | /* Receive var. len. data */ | |
2863 | DBG("Receiving var len data from client ..."); | |
2864 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
2865 | cmd_ctx->lsm->u.filter.bytecode_len); | |
2866 | if (ret <= 0) { | |
2867 | DBG("Nothing recv() from client var len data... continuing"); | |
2868 | *sock_error = 1; | |
f73fabfd | 2869 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2870 | goto error; |
2871 | } | |
2872 | ||
2873 | if (bytecode->len + sizeof(*bytecode) | |
2874 | != cmd_ctx->lsm->u.filter.bytecode_len) { | |
2875 | free(bytecode); | |
f73fabfd | 2876 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2877 | goto error; |
2878 | } | |
2879 | ||
2880 | ret = cmd_set_filter(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2881 | cmd_ctx->lsm->u.filter.channel_name, | |
178191b3 | 2882 | &cmd_ctx->lsm->u.filter.event, |
53a80697 MD |
2883 | bytecode); |
2884 | break; | |
2885 | } | |
6d805429 | 2886 | case LTTNG_DATA_PENDING: |
806e2684 | 2887 | { |
6d805429 | 2888 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
2889 | break; |
2890 | } | |
5e16da05 | 2891 | default: |
f73fabfd | 2892 | ret = LTTNG_ERR_UND; |
5461b305 | 2893 | break; |
fac6795d DG |
2894 | } |
2895 | ||
5461b305 | 2896 | error: |
5461b305 DG |
2897 | if (cmd_ctx->llm == NULL) { |
2898 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 2899 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
2900 | goto setup_error; |
2901 | } | |
2902 | } | |
54d01ffb | 2903 | /* Set return code */ |
5461b305 | 2904 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 2905 | setup_error: |
b5541356 | 2906 | if (cmd_ctx->session) { |
54d01ffb | 2907 | session_unlock(cmd_ctx->session); |
b5541356 | 2908 | } |
256a5576 MD |
2909 | if (need_tracing_session) { |
2910 | session_unlock_list(); | |
2911 | } | |
54d01ffb | 2912 | init_setup_error: |
8028d920 | 2913 | return ret; |
fac6795d DG |
2914 | } |
2915 | ||
44a5e5eb DG |
2916 | /* |
2917 | * Thread managing health check socket. | |
2918 | */ | |
2919 | static void *thread_manage_health(void *data) | |
2920 | { | |
eb4a2943 | 2921 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
2922 | uint32_t revents, nb_fd; |
2923 | struct lttng_poll_event events; | |
2924 | struct lttcomm_health_msg msg; | |
2925 | struct lttcomm_health_data reply; | |
2926 | ||
2927 | DBG("[thread] Manage health check started"); | |
2928 | ||
2929 | rcu_register_thread(); | |
2930 | ||
2931 | /* Create unix socket */ | |
2932 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
2933 | if (sock < 0) { | |
2934 | ERR("Unable to create health check Unix socket"); | |
2935 | ret = -1; | |
2936 | goto error; | |
2937 | } | |
2938 | ||
b662582b DG |
2939 | /* |
2940 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2941 | * show must go on. | |
2942 | */ | |
2943 | (void) utils_set_fd_cloexec(sock); | |
2944 | ||
44a5e5eb DG |
2945 | ret = lttcomm_listen_unix_sock(sock); |
2946 | if (ret < 0) { | |
2947 | goto error; | |
2948 | } | |
2949 | ||
2950 | /* | |
2951 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
2952 | * more will be added to this poll set. | |
2953 | */ | |
2954 | ret = create_thread_poll_set(&events, 2); | |
2955 | if (ret < 0) { | |
2956 | goto error; | |
2957 | } | |
2958 | ||
2959 | /* Add the application registration socket */ | |
2960 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
2961 | if (ret < 0) { | |
2962 | goto error; | |
2963 | } | |
2964 | ||
2965 | while (1) { | |
2966 | DBG("Health check ready"); | |
2967 | ||
2968 | nb_fd = LTTNG_POLL_GETNB(&events); | |
2969 | ||
2970 | /* Inifinite blocking call, waiting for transmission */ | |
2971 | restart: | |
2972 | ret = lttng_poll_wait(&events, -1); | |
2973 | if (ret < 0) { | |
2974 | /* | |
2975 | * Restart interrupted system call. | |
2976 | */ | |
2977 | if (errno == EINTR) { | |
2978 | goto restart; | |
2979 | } | |
2980 | goto error; | |
2981 | } | |
2982 | ||
2983 | for (i = 0; i < nb_fd; i++) { | |
2984 | /* Fetch once the poll data */ | |
2985 | revents = LTTNG_POLL_GETEV(&events, i); | |
2986 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2987 | ||
2988 | /* Thread quit pipe has been closed. Killing thread. */ | |
2989 | ret = check_thread_quit_pipe(pollfd, revents); | |
2990 | if (ret) { | |
139ac872 MD |
2991 | err = 0; |
2992 | goto exit; | |
44a5e5eb DG |
2993 | } |
2994 | ||
2995 | /* Event on the registration socket */ | |
2996 | if (pollfd == sock) { | |
2997 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2998 | ERR("Health socket poll error"); | |
2999 | goto error; | |
3000 | } | |
3001 | } | |
3002 | } | |
3003 | ||
3004 | new_sock = lttcomm_accept_unix_sock(sock); | |
3005 | if (new_sock < 0) { | |
3006 | goto error; | |
3007 | } | |
3008 | ||
b662582b DG |
3009 | /* |
3010 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3011 | * show must go on. | |
3012 | */ | |
3013 | (void) utils_set_fd_cloexec(new_sock); | |
3014 | ||
44a5e5eb DG |
3015 | DBG("Receiving data from client for health..."); |
3016 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3017 | if (ret <= 0) { | |
3018 | DBG("Nothing recv() from client... continuing"); | |
3019 | ret = close(new_sock); | |
3020 | if (ret) { | |
3021 | PERROR("close"); | |
3022 | } | |
3023 | new_sock = -1; | |
3024 | continue; | |
3025 | } | |
3026 | ||
3027 | rcu_thread_online(); | |
3028 | ||
3029 | switch (msg.component) { | |
3030 | case LTTNG_HEALTH_CMD: | |
3031 | reply.ret_code = health_check_state(&health_thread_cmd); | |
3032 | break; | |
139ac872 MD |
3033 | case LTTNG_HEALTH_APP_MANAGE: |
3034 | reply.ret_code = health_check_state(&health_thread_app_manage); | |
3035 | break; | |
44a5e5eb DG |
3036 | case LTTNG_HEALTH_APP_REG: |
3037 | reply.ret_code = health_check_state(&health_thread_app_reg); | |
3038 | break; | |
3039 | case LTTNG_HEALTH_KERNEL: | |
3040 | reply.ret_code = health_check_state(&health_thread_kernel); | |
3041 | break; | |
3042 | case LTTNG_HEALTH_CONSUMER: | |
3043 | reply.ret_code = check_consumer_health(); | |
3044 | break; | |
3045 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 3046 | reply.ret_code = |
139ac872 MD |
3047 | health_check_state(&health_thread_app_manage) && |
3048 | health_check_state(&health_thread_app_reg) && | |
3049 | health_check_state(&health_thread_cmd) && | |
3050 | health_check_state(&health_thread_kernel) && | |
3051 | check_consumer_health(); | |
44a5e5eb DG |
3052 | break; |
3053 | default: | |
f73fabfd | 3054 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3055 | break; |
3056 | } | |
3057 | ||
3058 | /* | |
3059 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3060 | * the client where in the sessiond it is the opposite. Again, this is | |
3061 | * just to make things easier for us poor developer which enjoy a lot | |
3062 | * lazyness. | |
3063 | */ | |
3064 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3065 | reply.ret_code = !reply.ret_code; | |
3066 | } | |
3067 | ||
3068 | DBG2("Health check return value %d", reply.ret_code); | |
3069 | ||
3070 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3071 | if (ret < 0) { | |
3072 | ERR("Failed to send health data back to client"); | |
3073 | } | |
3074 | ||
3075 | /* End of transmission */ | |
3076 | ret = close(new_sock); | |
3077 | if (ret) { | |
3078 | PERROR("close"); | |
3079 | } | |
3080 | new_sock = -1; | |
3081 | } | |
3082 | ||
139ac872 | 3083 | exit: |
44a5e5eb | 3084 | error: |
139ac872 MD |
3085 | if (err) { |
3086 | ERR("Health error occurred in %s", __func__); | |
3087 | } | |
44a5e5eb DG |
3088 | DBG("Health check thread dying"); |
3089 | unlink(health_unix_sock_path); | |
3090 | if (sock >= 0) { | |
3091 | ret = close(sock); | |
3092 | if (ret) { | |
3093 | PERROR("close"); | |
3094 | } | |
3095 | } | |
3096 | if (new_sock >= 0) { | |
3097 | ret = close(new_sock); | |
3098 | if (ret) { | |
3099 | PERROR("close"); | |
3100 | } | |
3101 | } | |
3102 | ||
3103 | lttng_poll_clean(&events); | |
3104 | ||
3105 | rcu_unregister_thread(); | |
3106 | return NULL; | |
3107 | } | |
3108 | ||
1d4b027a | 3109 | /* |
d063d709 DG |
3110 | * This thread manage all clients request using the unix client socket for |
3111 | * communication. | |
1d4b027a DG |
3112 | */ |
3113 | static void *thread_manage_clients(void *data) | |
3114 | { | |
139ac872 | 3115 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3116 | int sock_error; |
5eb91c98 | 3117 | uint32_t revents, nb_fd; |
273ea72c | 3118 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3119 | struct lttng_poll_event events; |
1d4b027a DG |
3120 | |
3121 | DBG("[thread] Manage client started"); | |
3122 | ||
8ac94142 CB |
3123 | testpoint(thread_manage_clients); |
3124 | ||
f6a9efaa DG |
3125 | rcu_register_thread(); |
3126 | ||
44a5e5eb DG |
3127 | health_code_update(&health_thread_cmd); |
3128 | ||
1d4b027a DG |
3129 | ret = lttcomm_listen_unix_sock(client_sock); |
3130 | if (ret < 0) { | |
35df2755 | 3131 | goto error_listen; |
1d4b027a DG |
3132 | } |
3133 | ||
5eb91c98 DG |
3134 | /* |
3135 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3136 | * more will be added to this poll set. | |
3137 | */ | |
3138 | ret = create_thread_poll_set(&events, 2); | |
3139 | if (ret < 0) { | |
35df2755 | 3140 | goto error_create_poll; |
5eb91c98 | 3141 | } |
273ea72c | 3142 | |
5eb91c98 DG |
3143 | /* Add the application registration socket */ |
3144 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3145 | if (ret < 0) { | |
3146 | goto error; | |
3147 | } | |
273ea72c | 3148 | |
bbd973c2 DG |
3149 | /* |
3150 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3151 | */ |
3152 | if (opt_sig_parent) { | |
8db8d1dc | 3153 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3154 | } |
3155 | ||
8ac94142 CB |
3156 | testpoint(thread_manage_clients_before_loop); |
3157 | ||
44a5e5eb DG |
3158 | health_code_update(&health_thread_cmd); |
3159 | ||
1d4b027a | 3160 | while (1) { |
1d4b027a | 3161 | DBG("Accepting client command ..."); |
273ea72c | 3162 | |
5eb91c98 DG |
3163 | nb_fd = LTTNG_POLL_GETNB(&events); |
3164 | ||
273ea72c | 3165 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 3166 | restart: |
44a5e5eb | 3167 | health_poll_update(&health_thread_cmd); |
5eb91c98 | 3168 | ret = lttng_poll_wait(&events, -1); |
44a5e5eb | 3169 | health_poll_update(&health_thread_cmd); |
273ea72c | 3170 | if (ret < 0) { |
88f2b785 MD |
3171 | /* |
3172 | * Restart interrupted system call. | |
3173 | */ | |
3174 | if (errno == EINTR) { | |
3175 | goto restart; | |
3176 | } | |
273ea72c DG |
3177 | goto error; |
3178 | } | |
3179 | ||
5eb91c98 DG |
3180 | for (i = 0; i < nb_fd; i++) { |
3181 | /* Fetch once the poll data */ | |
3182 | revents = LTTNG_POLL_GETEV(&events, i); | |
3183 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3184 | ||
44a5e5eb DG |
3185 | health_code_update(&health_thread_cmd); |
3186 | ||
5eb91c98 DG |
3187 | /* Thread quit pipe has been closed. Killing thread. */ |
3188 | ret = check_thread_quit_pipe(pollfd, revents); | |
3189 | if (ret) { | |
139ac872 MD |
3190 | err = 0; |
3191 | goto exit; | |
5eb91c98 DG |
3192 | } |
3193 | ||
3194 | /* Event on the registration socket */ | |
3195 | if (pollfd == client_sock) { | |
3196 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3197 | ERR("Client socket poll error"); | |
3198 | goto error; | |
3199 | } | |
3200 | } | |
3201 | } | |
3202 | ||
3203 | DBG("Wait for client response"); | |
3204 | ||
44a5e5eb DG |
3205 | health_code_update(&health_thread_cmd); |
3206 | ||
5eb91c98 DG |
3207 | sock = lttcomm_accept_unix_sock(client_sock); |
3208 | if (sock < 0) { | |
273ea72c | 3209 | goto error; |
273ea72c DG |
3210 | } |
3211 | ||
b662582b DG |
3212 | /* |
3213 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3214 | * show must go on. | |
3215 | */ | |
3216 | (void) utils_set_fd_cloexec(sock); | |
3217 | ||
be040666 DG |
3218 | /* Set socket option for credentials retrieval */ |
3219 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3220 | if (ret < 0) { | |
3221 | goto error; | |
3222 | } | |
3223 | ||
5eb91c98 | 3224 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3225 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3226 | if (cmd_ctx == NULL) { |
76d7553f | 3227 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3228 | goto error; |
5eb91c98 | 3229 | } |
1d4b027a | 3230 | |
5eb91c98 | 3231 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3232 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3233 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3234 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3235 | goto error; |
3236 | } | |
1d4b027a | 3237 | |
5eb91c98 DG |
3238 | cmd_ctx->llm = NULL; |
3239 | cmd_ctx->session = NULL; | |
1d4b027a | 3240 | |
44a5e5eb DG |
3241 | health_code_update(&health_thread_cmd); |
3242 | ||
5eb91c98 DG |
3243 | /* |
3244 | * Data is received from the lttng client. The struct | |
3245 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3246 | * the client. | |
3247 | */ | |
3248 | DBG("Receiving data from client ..."); | |
be040666 DG |
3249 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3250 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3251 | if (ret <= 0) { |
3252 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3253 | ret = close(sock); |
3254 | if (ret) { | |
3255 | PERROR("close"); | |
3256 | } | |
3257 | sock = -1; | |
a2c0da86 | 3258 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3259 | continue; |
3260 | } | |
1d4b027a | 3261 | |
44a5e5eb DG |
3262 | health_code_update(&health_thread_cmd); |
3263 | ||
5eb91c98 DG |
3264 | // TODO: Validate cmd_ctx including sanity check for |
3265 | // security purpose. | |
f7776ea7 | 3266 | |
f6a9efaa | 3267 | rcu_thread_online(); |
5eb91c98 DG |
3268 | /* |
3269 | * This function dispatch the work to the kernel or userspace tracer | |
3270 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3271 | * informations for the client. The command context struct contains | |
3272 | * everything this function may needs. | |
3273 | */ | |
53a80697 | 3274 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3275 | rcu_thread_offline(); |
5eb91c98 | 3276 | if (ret < 0) { |
53a80697 MD |
3277 | if (sock_error) { |
3278 | ret = close(sock); | |
3279 | if (ret) { | |
3280 | PERROR("close"); | |
3281 | } | |
3282 | sock = -1; | |
3283 | } | |
bbd973c2 | 3284 | /* |
5eb91c98 | 3285 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3286 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3287 | * (ENOMEM). Error detected but still accept |
3288 | * command, unless a socket error has been | |
3289 | * detected. | |
bbd973c2 | 3290 | */ |
bbd973c2 | 3291 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3292 | continue; |
3293 | } | |
d6e4fca4 | 3294 | |
44a5e5eb DG |
3295 | health_code_update(&health_thread_cmd); |
3296 | ||
54d01ffb DG |
3297 | DBG("Sending response (size: %d, retcode: %s)", |
3298 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3299 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3300 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3301 | if (ret < 0) { |
3302 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3303 | } |
1d4b027a | 3304 | |
5eb91c98 | 3305 | /* End of transmission */ |
76d7553f MD |
3306 | ret = close(sock); |
3307 | if (ret) { | |
3308 | PERROR("close"); | |
3309 | } | |
3310 | sock = -1; | |
be040666 DG |
3311 | |
3312 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb DG |
3313 | |
3314 | health_code_update(&health_thread_cmd); | |
273ea72c DG |
3315 | } |
3316 | ||
139ac872 | 3317 | exit: |
5eb91c98 | 3318 | error: |
35df2755 CB |
3319 | if (sock >= 0) { |
3320 | ret = close(sock); | |
3321 | if (ret) { | |
3322 | PERROR("close"); | |
3323 | } | |
139ac872 | 3324 | } |
44a5e5eb | 3325 | |
35df2755 CB |
3326 | lttng_poll_clean(&events); |
3327 | clean_command_ctx(&cmd_ctx); | |
3328 | ||
3329 | error_listen: | |
3330 | error_create_poll: | |
273ea72c | 3331 | unlink(client_unix_sock_path); |
76d7553f MD |
3332 | if (client_sock >= 0) { |
3333 | ret = close(client_sock); | |
3334 | if (ret) { | |
3335 | PERROR("close"); | |
3336 | } | |
a4b35e07 | 3337 | } |
35df2755 CB |
3338 | |
3339 | if (err) { | |
3340 | health_error(&health_thread_cmd); | |
3341 | ERR("Health error occurred in %s", __func__); | |
a4b35e07 | 3342 | } |
273ea72c | 3343 | |
35df2755 CB |
3344 | health_exit(&health_thread_cmd); |
3345 | ||
3346 | DBG("Client thread dying"); | |
f6a9efaa DG |
3347 | |
3348 | rcu_unregister_thread(); | |
1d4b027a DG |
3349 | return NULL; |
3350 | } | |
3351 | ||
3352 | ||
fac6795d DG |
3353 | /* |
3354 | * usage function on stderr | |
3355 | */ | |
3356 | static void usage(void) | |
3357 | { | |
b716ce68 | 3358 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3359 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3360 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3361 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3362 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3363 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3364 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3365 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3366 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3367 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3368 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3369 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3370 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3371 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3372 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3373 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3374 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3375 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3376 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3377 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3378 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3379 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3380 | } |
3381 | ||
3382 | /* | |
3383 | * daemon argument parsing | |
3384 | */ | |
3385 | static int parse_args(int argc, char **argv) | |
3386 | { | |
3387 | int c; | |
3388 | ||
3389 | static struct option long_options[] = { | |
3390 | { "client-sock", 1, 0, 'c' }, | |
3391 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3392 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3393 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3394 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3395 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3396 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3397 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3398 | { "consumerd32-path", 1, 0, 'u' }, | |
3399 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3400 | { "consumerd64-path", 1, 0, 't' }, | |
3401 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3402 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3403 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3404 | { "help", 0, 0, 'h' }, |
3405 | { "group", 1, 0, 'g' }, | |
3406 | { "version", 0, 0, 'V' }, | |
75462a81 | 3407 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3408 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3409 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3410 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3411 | { NULL, 0, 0, 0 } |
3412 | }; | |
3413 | ||
3414 | while (1) { | |
3415 | int option_index = 0; | |
4fba7219 | 3416 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3417 | long_options, &option_index); |
fac6795d DG |
3418 | if (c == -1) { |
3419 | break; | |
3420 | } | |
3421 | ||
3422 | switch (c) { | |
3423 | case 0: | |
3424 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3425 | if (optarg) { | |
3426 | fprintf(stderr, " with arg %s\n", optarg); | |
3427 | } | |
3428 | break; | |
b716ce68 | 3429 | case 'c': |
fac6795d DG |
3430 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3431 | break; | |
3432 | case 'a': | |
3433 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3434 | break; | |
3435 | case 'd': | |
3436 | opt_daemon = 1; | |
3437 | break; | |
3438 | case 'g': | |
fb09408a | 3439 | opt_tracing_group = optarg; |
fac6795d DG |
3440 | break; |
3441 | case 'h': | |
3442 | usage(); | |
3443 | exit(EXIT_FAILURE); | |
3444 | case 'V': | |
3445 | fprintf(stdout, "%s\n", VERSION); | |
3446 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3447 | case 'S': |
3448 | opt_sig_parent = 1; | |
3449 | break; | |
d6f42150 | 3450 | case 'E': |
3bd1e081 | 3451 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3452 | break; |
3453 | case 'C': | |
3bd1e081 MD |
3454 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3455 | break; | |
3456 | case 'F': | |
7753dea8 | 3457 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3458 | break; |
3459 | case 'D': | |
7753dea8 MD |
3460 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3461 | break; | |
3462 | case 'H': | |
3463 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3464 | break; | |
3465 | case 'G': | |
3466 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3467 | break; |
4fba7219 DG |
3468 | case 'N': |
3469 | opt_no_kernel = 1; | |
3470 | break; | |
75462a81 | 3471 | case 'q': |
97e19046 | 3472 | lttng_opt_quiet = 1; |
75462a81 | 3473 | break; |
3f9947db | 3474 | case 'v': |
53086306 | 3475 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3476 | lttng_opt_verbose += 1; |
3f9947db | 3477 | break; |
31f73cc9 | 3478 | case 'Z': |
3bd1e081 | 3479 | opt_verbose_consumer += 1; |
31f73cc9 | 3480 | break; |
fb09408a | 3481 | case 'u': |
fc7a59ce | 3482 | consumerd32_bin= optarg; |
ebaeda94 MD |
3483 | break; |
3484 | case 'U': | |
3485 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3486 | break; |
3487 | case 't': | |
fc7a59ce | 3488 | consumerd64_bin = optarg; |
ebaeda94 MD |
3489 | break; |
3490 | case 'T': | |
3491 | consumerd64_libdir = optarg; | |
fb09408a | 3492 | break; |
fac6795d DG |
3493 | default: |
3494 | /* Unknown option or other error. | |
3495 | * Error is printed by getopt, just return */ | |
3496 | return -1; | |
3497 | } | |
3498 | } | |
3499 | ||
3500 | return 0; | |
3501 | } | |
3502 | ||
3503 | /* | |
d063d709 | 3504 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3505 | * apps_sock - The communication socket for all UST apps. |
3506 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3507 | */ |
cf3af59e | 3508 | static int init_daemon_socket(void) |
fac6795d DG |
3509 | { |
3510 | int ret = 0; | |
3511 | mode_t old_umask; | |
3512 | ||
3513 | old_umask = umask(0); | |
3514 | ||
3515 | /* Create client tool unix socket */ | |
d6f42150 DG |
3516 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3517 | if (client_sock < 0) { | |
3518 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3519 | ret = -1; |
3520 | goto end; | |
3521 | } | |
3522 | ||
b662582b DG |
3523 | /* Set the cloexec flag */ |
3524 | ret = utils_set_fd_cloexec(client_sock); | |
3525 | if (ret < 0) { | |
3526 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3527 | "Continuing but note that the consumer daemon will have a " | |
3528 | "reference to this socket on exec()", client_sock); | |
3529 | } | |
3530 | ||
fac6795d DG |
3531 | /* File permission MUST be 660 */ |
3532 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3533 | if (ret < 0) { | |
d6f42150 | 3534 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3535 | PERROR("chmod"); |
fac6795d DG |
3536 | goto end; |
3537 | } | |
3538 | ||
3539 | /* Create the application unix socket */ | |
d6f42150 DG |
3540 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3541 | if (apps_sock < 0) { | |
3542 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3543 | ret = -1; |
3544 | goto end; | |
3545 | } | |
3546 | ||
b662582b DG |
3547 | /* Set the cloexec flag */ |
3548 | ret = utils_set_fd_cloexec(apps_sock); | |
3549 | if (ret < 0) { | |
3550 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3551 | "Continuing but note that the consumer daemon will have a " | |
3552 | "reference to this socket on exec()", apps_sock); | |
3553 | } | |
3554 | ||
d6f42150 | 3555 | /* File permission MUST be 666 */ |
54d01ffb DG |
3556 | ret = chmod(apps_unix_sock_path, |
3557 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3558 | if (ret < 0) { |
d6f42150 | 3559 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3560 | PERROR("chmod"); |
fac6795d DG |
3561 | goto end; |
3562 | } | |
3563 | ||
b662582b DG |
3564 | DBG3("Session daemon client socket %d and application socket %d created", |
3565 | client_sock, apps_sock); | |
3566 | ||
fac6795d DG |
3567 | end: |
3568 | umask(old_umask); | |
3569 | return ret; | |
3570 | } | |
3571 | ||
3572 | /* | |
54d01ffb DG |
3573 | * Check if the global socket is available, and if a daemon is answering at the |
3574 | * other side. If yes, error is returned. | |
fac6795d | 3575 | */ |
cf3af59e | 3576 | static int check_existing_daemon(void) |
fac6795d | 3577 | { |
7d8234d9 | 3578 | /* Is there anybody out there ? */ |
099e26bd | 3579 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3580 | return -EEXIST; |
099e26bd | 3581 | } |
b09c7c76 DG |
3582 | |
3583 | return 0; | |
fac6795d DG |
3584 | } |
3585 | ||
fac6795d | 3586 | /* |
d063d709 | 3587 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3588 | * |
d063d709 | 3589 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3590 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3591 | */ |
be040666 | 3592 | static int set_permissions(char *rundir) |
fac6795d DG |
3593 | { |
3594 | int ret; | |
996b65c8 | 3595 | gid_t gid; |
fac6795d | 3596 | |
6775595e DG |
3597 | ret = allowed_group(); |
3598 | if (ret < 0) { | |
be040666 DG |
3599 | WARN("No tracing group detected"); |
3600 | ret = 0; | |
fac6795d DG |
3601 | goto end; |
3602 | } | |
3603 | ||
6775595e DG |
3604 | gid = ret; |
3605 | ||
d6f42150 | 3606 | /* Set lttng run dir */ |
be040666 | 3607 | ret = chown(rundir, 0, gid); |
d6f42150 | 3608 | if (ret < 0) { |
be040666 | 3609 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3610 | PERROR("chown"); |
d6f42150 DG |
3611 | } |
3612 | ||
d1613cf5 | 3613 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3614 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3615 | if (ret < 0) { |
3616 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3617 | PERROR("chmod"); |
d1613cf5 JN |
3618 | } |
3619 | ||
d6f42150 | 3620 | /* lttng client socket path */ |
996b65c8 | 3621 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3622 | if (ret < 0) { |
d6f42150 | 3623 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3624 | PERROR("chown"); |
d6f42150 DG |
3625 | } |
3626 | ||
3bd1e081 MD |
3627 | /* kconsumer error socket path */ |
3628 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3629 | if (ret < 0) { |
3bd1e081 | 3630 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3631 | PERROR("chown"); |
3bd1e081 MD |
3632 | } |
3633 | ||
7753dea8 MD |
3634 | /* 64-bit ustconsumer error socket path */ |
3635 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3636 | if (ret < 0) { | |
3637 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3638 | PERROR("chown"); |
7753dea8 MD |
3639 | } |
3640 | ||
3641 | /* 32-bit ustconsumer compat32 error socket path */ | |
3642 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3643 | if (ret < 0) { |
7753dea8 | 3644 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3645 | PERROR("chown"); |
fac6795d DG |
3646 | } |
3647 | ||
d6f42150 | 3648 | DBG("All permissions are set"); |
e07ae692 | 3649 | |
fac6795d DG |
3650 | end: |
3651 | return ret; | |
3652 | } | |
3653 | ||
d6f42150 | 3654 | /* |
d063d709 | 3655 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3656 | */ |
67e40797 | 3657 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3658 | { |
3659 | int ret; | |
3660 | ||
67e40797 DG |
3661 | DBG3("Creating LTTng run directory: %s", rundir); |
3662 | ||
d1613cf5 | 3663 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3664 | if (ret < 0) { |
b1f11e69 | 3665 | if (errno != EEXIST) { |
67e40797 | 3666 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3667 | goto error; |
3668 | } else { | |
3669 | ret = 0; | |
3670 | } | |
d6f42150 DG |
3671 | } |
3672 | ||
3673 | error: | |
3674 | return ret; | |
3675 | } | |
3676 | ||
3677 | /* | |
d063d709 DG |
3678 | * Setup sockets and directory needed by the kconsumerd communication with the |
3679 | * session daemon. | |
d6f42150 | 3680 | */ |
67e40797 DG |
3681 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3682 | const char *rundir) | |
d6f42150 DG |
3683 | { |
3684 | int ret; | |
67e40797 | 3685 | char path[PATH_MAX]; |
d6f42150 | 3686 | |
67e40797 | 3687 | switch (consumer_data->type) { |
7753dea8 | 3688 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3689 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3690 | break; |
3691 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3692 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3693 | break; |
3694 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3695 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3696 | break; |
3697 | default: | |
3698 | ERR("Consumer type unknown"); | |
3699 | ret = -EINVAL; | |
3700 | goto error; | |
d6f42150 DG |
3701 | } |
3702 | ||
67e40797 DG |
3703 | DBG2("Creating consumer directory: %s", path); |
3704 | ||
d1613cf5 | 3705 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3706 | if (ret < 0) { |
6beb2242 | 3707 | if (errno != EEXIST) { |
f11e84c2 | 3708 | PERROR("mkdir"); |
3bd1e081 | 3709 | ERR("Failed to create %s", path); |
6beb2242 DG |
3710 | goto error; |
3711 | } | |
f11e84c2 | 3712 | ret = -1; |
d6f42150 DG |
3713 | } |
3714 | ||
3715 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3716 | consumer_data->err_sock = |
3717 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3718 | if (consumer_data->err_sock < 0) { | |
3719 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3720 | ret = -1; |
3721 | goto error; | |
3722 | } | |
3723 | ||
3724 | /* File permission MUST be 660 */ | |
3bd1e081 | 3725 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3726 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3727 | if (ret < 0) { |
3bd1e081 | 3728 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3729 | PERROR("chmod"); |
d6f42150 DG |
3730 | goto error; |
3731 | } | |
3732 | ||
3733 | error: | |
3734 | return ret; | |
3735 | } | |
3736 | ||
fac6795d | 3737 | /* |
d063d709 | 3738 | * Signal handler for the daemon |
cf3af59e | 3739 | * |
54d01ffb DG |
3740 | * Simply stop all worker threads, leaving main() return gracefully after |
3741 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3742 | */ |
3743 | static void sighandler(int sig) | |
3744 | { | |
3745 | switch (sig) { | |
cf3af59e | 3746 | case SIGPIPE: |
af87c45a | 3747 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3748 | return; |
3749 | case SIGINT: | |
af87c45a | 3750 | DBG("SIGINT caught"); |
cf3af59e MD |
3751 | stop_threads(); |
3752 | break; | |
3753 | case SIGTERM: | |
af87c45a | 3754 | DBG("SIGTERM caught"); |
cf3af59e MD |
3755 | stop_threads(); |
3756 | break; | |
3757 | default: | |
3758 | break; | |
fac6795d | 3759 | } |
fac6795d DG |
3760 | } |
3761 | ||
3762 | /* | |
d063d709 | 3763 | * Setup signal handler for : |
1d4b027a | 3764 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3765 | */ |
1d4b027a | 3766 | static int set_signal_handler(void) |
fac6795d | 3767 | { |
1d4b027a DG |
3768 | int ret = 0; |
3769 | struct sigaction sa; | |
3770 | sigset_t sigset; | |
fac6795d | 3771 | |
1d4b027a | 3772 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3773 | PERROR("sigemptyset"); |
1d4b027a DG |
3774 | return ret; |
3775 | } | |
d6f42150 | 3776 | |
1d4b027a DG |
3777 | sa.sa_handler = sighandler; |
3778 | sa.sa_mask = sigset; | |
3779 | sa.sa_flags = 0; | |
3780 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3781 | PERROR("sigaction"); |
1d4b027a | 3782 | return ret; |
d6f42150 DG |
3783 | } |
3784 | ||
1d4b027a | 3785 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 3786 | PERROR("sigaction"); |
1d4b027a | 3787 | return ret; |
d6f42150 | 3788 | } |
aaf26714 | 3789 | |
1d4b027a | 3790 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 3791 | PERROR("sigaction"); |
1d4b027a | 3792 | return ret; |
8c0faa1d DG |
3793 | } |
3794 | ||
1d4b027a DG |
3795 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3796 | ||
3797 | return ret; | |
fac6795d DG |
3798 | } |
3799 | ||
f3ed775e | 3800 | /* |
d063d709 DG |
3801 | * Set open files limit to unlimited. This daemon can open a large number of |
3802 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3803 | */ |
3804 | static void set_ulimit(void) | |
3805 | { | |
3806 | int ret; | |
3807 | struct rlimit lim; | |
3808 | ||
a88df331 | 3809 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3810 | lim.rlim_cur = 65535; |
3811 | lim.rlim_max = 65535; | |
3812 | ||
3813 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3814 | if (ret < 0) { | |
76d7553f | 3815 | PERROR("failed to set open files limit"); |
f3ed775e DG |
3816 | } |
3817 | } | |
3818 | ||
fac6795d DG |
3819 | /* |
3820 | * main | |
3821 | */ | |
3822 | int main(int argc, char **argv) | |
3823 | { | |
fac6795d DG |
3824 | int ret = 0; |
3825 | void *status; | |
ae9e45b3 | 3826 | const char *home_path, *env_app_timeout; |
fac6795d | 3827 | |
335a95b7 MD |
3828 | init_kernel_workarounds(); |
3829 | ||
f6a9efaa DG |
3830 | rcu_register_thread(); |
3831 | ||
7753dea8 | 3832 | setup_consumerd_path(); |
fb09408a | 3833 | |
fac6795d DG |
3834 | /* Parse arguments */ |
3835 | progname = argv[0]; | |
3836 | if ((ret = parse_args(argc, argv) < 0)) { | |
cf3af59e | 3837 | goto error; |
fac6795d DG |
3838 | } |
3839 | ||
3840 | /* Daemonize */ | |
3841 | if (opt_daemon) { | |
ceed52b5 MD |
3842 | int i; |
3843 | ||
3844 | /* | |
3845 | * fork | |
3846 | * child: setsid, close FD 0, 1, 2, chdir / | |
3847 | * parent: exit (if fork is successful) | |
3848 | */ | |
53094c05 DG |
3849 | ret = daemon(0, 0); |
3850 | if (ret < 0) { | |
76d7553f | 3851 | PERROR("daemon"); |
cf3af59e | 3852 | goto error; |
53094c05 | 3853 | } |
ceed52b5 MD |
3854 | /* |
3855 | * We are in the child. Make sure all other file | |
3856 | * descriptors are closed, in case we are called with | |
3857 | * more opened file descriptors than the standard ones. | |
3858 | */ | |
3859 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3860 | (void) close(i); | |
3861 | } | |
3862 | } | |
3863 | ||
3864 | /* Create thread quit pipe */ | |
3865 | if ((ret = init_thread_quit_pipe()) < 0) { | |
3866 | goto error; | |
fac6795d DG |
3867 | } |
3868 | ||
3869 | /* Check if daemon is UID = 0 */ | |
3870 | is_root = !getuid(); | |
3871 | ||
fac6795d | 3872 | if (is_root) { |
990570ed | 3873 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
3874 | |
3875 | /* Create global run dir with root access */ | |
3876 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 3877 | if (ret < 0) { |
cf3af59e | 3878 | goto error; |
d6f42150 DG |
3879 | } |
3880 | ||
fac6795d | 3881 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
3882 | snprintf(apps_unix_sock_path, PATH_MAX, |
3883 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
3884 | } |
3885 | ||
3886 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
3887 | snprintf(client_unix_sock_path, PATH_MAX, |
3888 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
3889 | } | |
0fdd1e2c DG |
3890 | |
3891 | /* Set global SHM for ust */ | |
3892 | if (strlen(wait_shm_path) == 0) { | |
3893 | snprintf(wait_shm_path, PATH_MAX, | |
3894 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
3895 | } | |
67e40797 | 3896 | |
44a5e5eb DG |
3897 | if (strlen(health_unix_sock_path) == 0) { |
3898 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3899 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
3900 | } | |
3901 | ||
67e40797 DG |
3902 | /* Setup kernel consumerd path */ |
3903 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3904 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 3905 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3906 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3907 | |
3908 | DBG2("Kernel consumer err path: %s", | |
3909 | kconsumer_data.err_unix_sock_path); | |
3910 | DBG2("Kernel consumer cmd path: %s", | |
3911 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 3912 | } else { |
b082db07 DG |
3913 | home_path = get_home_dir(); |
3914 | if (home_path == NULL) { | |
273ea72c DG |
3915 | /* TODO: Add --socket PATH option */ |
3916 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
3917 | ret = -EPERM; |
3918 | goto error; | |
b082db07 DG |
3919 | } |
3920 | ||
67e40797 DG |
3921 | /* |
3922 | * Create rundir from home path. This will create something like | |
3923 | * $HOME/.lttng | |
3924 | */ | |
990570ed | 3925 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
3926 | if (ret < 0) { |
3927 | ret = -ENOMEM; | |
3928 | goto error; | |
3929 | } | |
3930 | ||
3931 | ret = create_lttng_rundir(rundir); | |
3932 | if (ret < 0) { | |
3933 | goto error; | |
3934 | } | |
3935 | ||
fac6795d | 3936 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 3937 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 3938 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
3939 | } |
3940 | ||
3941 | /* Set the cli tool unix socket path */ | |
3942 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 3943 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 3944 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 3945 | } |
0fdd1e2c DG |
3946 | |
3947 | /* Set global SHM for ust */ | |
3948 | if (strlen(wait_shm_path) == 0) { | |
3949 | snprintf(wait_shm_path, PATH_MAX, | |
3950 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
3951 | } | |
44a5e5eb DG |
3952 | |
3953 | /* Set health check Unix path */ | |
3954 | if (strlen(health_unix_sock_path) == 0) { | |
3955 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3956 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
3957 | } | |
fac6795d DG |
3958 | } |
3959 | ||
5c827ce0 DG |
3960 | /* Set consumer initial state */ |
3961 | kernel_consumerd_state = CONSUMER_STOPPED; | |
3962 | ust_consumerd_state = CONSUMER_STOPPED; | |
3963 | ||
847177cd DG |
3964 | DBG("Client socket path %s", client_unix_sock_path); |
3965 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
3966 | DBG("LTTng run directory path: %s", rundir); |
3967 | ||
3968 | /* 32 bits consumerd path setup */ | |
3969 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3970 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 3971 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3972 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3973 | |
3974 | DBG2("UST consumer 32 bits err path: %s", | |
3975 | ustconsumer32_data.err_unix_sock_path); | |
3976 | DBG2("UST consumer 32 bits cmd path: %s", | |
3977 | ustconsumer32_data.cmd_unix_sock_path); | |
3978 | ||
3979 | /* 64 bits consumerd path setup */ | |
3980 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3981 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 3982 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3983 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3984 | |
3985 | DBG2("UST consumer 64 bits err path: %s", | |
3986 | ustconsumer64_data.err_unix_sock_path); | |
3987 | DBG2("UST consumer 64 bits cmd path: %s", | |
3988 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 3989 | |
273ea72c | 3990 | /* |
7d8234d9 | 3991 | * See if daemon already exist. |
fac6795d | 3992 | */ |
7d8234d9 | 3993 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 3994 | ERR("Already running daemon.\n"); |
273ea72c | 3995 | /* |
cf3af59e MD |
3996 | * We do not goto exit because we must not cleanup() |
3997 | * because a daemon is already running. | |
ab118b20 | 3998 | */ |
cf3af59e | 3999 | goto error; |
a88df331 DG |
4000 | } |
4001 | ||
1427f9b2 DG |
4002 | /* |
4003 | * Init UST app hash table. Alloc hash table before this point since | |
4004 | * cleanup() can get called after that point. | |
4005 | */ | |
4006 | ust_app_ht_alloc(); | |
4007 | ||
54d01ffb | 4008 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4009 | |
4010 | /* | |
4011 | * These actions must be executed as root. We do that *after* setting up | |
4012 | * the sockets path because we MUST make the check for another daemon using | |
4013 | * those paths *before* trying to set the kernel consumer sockets and init | |
4014 | * kernel tracer. | |
4015 | */ | |
4016 | if (is_root) { | |
67e40797 | 4017 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4018 | if (ret < 0) { |
4019 | goto exit; | |
4020 | } | |
4021 | ||
a88df331 | 4022 | /* Setup kernel tracer */ |
4fba7219 DG |
4023 | if (!opt_no_kernel) { |
4024 | init_kernel_tracer(); | |
4025 | } | |
a88df331 DG |
4026 | |
4027 | /* Set ulimit for open files */ | |
4028 | set_ulimit(); | |
fac6795d | 4029 | } |
4063050c MD |
4030 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4031 | lttng_fd_init(); | |
fac6795d | 4032 | |
67e40797 DG |
4033 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4034 | if (ret < 0) { | |
4035 | goto exit; | |
4036 | } | |
4037 | ||
4038 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4039 | if (ret < 0) { | |
4040 | goto exit; | |
4041 | } | |
4042 | ||
cf3af59e MD |
4043 | if ((ret = set_signal_handler()) < 0) { |
4044 | goto exit; | |
fac6795d DG |
4045 | } |
4046 | ||
d6f42150 | 4047 | /* Setup the needed unix socket */ |
cf3af59e MD |
4048 | if ((ret = init_daemon_socket()) < 0) { |
4049 | goto exit; | |
fac6795d DG |
4050 | } |
4051 | ||
4052 | /* Set credentials to socket */ | |
be040666 | 4053 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4054 | goto exit; |
fac6795d DG |
4055 | } |
4056 | ||
5b8719f5 DG |
4057 | /* Get parent pid if -S, --sig-parent is specified. */ |
4058 | if (opt_sig_parent) { | |
4059 | ppid = getppid(); | |
4060 | } | |
4061 | ||
7a485870 | 4062 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4063 | if (is_root && !opt_no_kernel) { |
4064 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4065 | goto exit; | |
4066 | } | |
7a485870 DG |
4067 | } |
4068 | ||
099e26bd | 4069 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4070 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4071 | goto exit; |
4072 | } | |
4073 | ||
4074 | /* Init UST command queue. */ | |
4075 | cds_wfq_init(&ust_cmd_queue.queue); | |
4076 | ||
273ea72c | 4077 | /* |
54d01ffb DG |
4078 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4079 | * statically declared in session.c | |
273ea72c | 4080 | */ |
54d01ffb | 4081 | session_list_ptr = session_get_list(); |
b5541356 | 4082 | |
5eb91c98 DG |
4083 | /* Set up max poll set size */ |
4084 | lttng_poll_set_max_size(); | |
4085 | ||
2f77fc4b | 4086 | cmd_init(); |
00e2e675 | 4087 | |
44a5e5eb DG |
4088 | /* Init all health thread counters. */ |
4089 | health_init(&health_thread_cmd); | |
4090 | health_init(&health_thread_kernel); | |
139ac872 | 4091 | health_init(&health_thread_app_manage); |
44a5e5eb DG |
4092 | health_init(&health_thread_app_reg); |
4093 | ||
4094 | /* | |
4095 | * Init health counters of the consumer thread. We do a quick hack here to | |
4096 | * the state of the consumer health is fine even if the thread is not | |
9449cc75 DG |
4097 | * started. Once the thread starts, the health state is updated with a poll |
4098 | * value to set a health code path. This is simply to ease our life and has | |
4099 | * no cost what so ever. | |
44a5e5eb DG |
4100 | */ |
4101 | health_init(&kconsumer_data.health); | |
4102 | health_poll_update(&kconsumer_data.health); | |
4103 | health_init(&ustconsumer32_data.health); | |
4104 | health_poll_update(&ustconsumer32_data.health); | |
4105 | health_init(&ustconsumer64_data.health); | |
4106 | health_poll_update(&ustconsumer64_data.health); | |
4107 | ||
ae9e45b3 DG |
4108 | /* Check for the application socket timeout env variable. */ |
4109 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4110 | if (env_app_timeout) { | |
4111 | app_socket_timeout = atoi(env_app_timeout); | |
4112 | } else { | |
4113 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4114 | } | |
4115 | ||
44a5e5eb DG |
4116 | /* Create thread to manage the client socket */ |
4117 | ret = pthread_create(&health_thread, NULL, | |
4118 | thread_manage_health, (void *) NULL); | |
4119 | if (ret != 0) { | |
4120 | PERROR("pthread_create health"); | |
4121 | goto exit_health; | |
4122 | } | |
4123 | ||
cf3af59e | 4124 | /* Create thread to manage the client socket */ |
099e26bd DG |
4125 | ret = pthread_create(&client_thread, NULL, |
4126 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4127 | if (ret != 0) { |
76d7553f | 4128 | PERROR("pthread_create clients"); |
cf3af59e MD |
4129 | goto exit_client; |
4130 | } | |
fac6795d | 4131 | |
099e26bd DG |
4132 | /* Create thread to dispatch registration */ |
4133 | ret = pthread_create(&dispatch_thread, NULL, | |
4134 | thread_dispatch_ust_registration, (void *) NULL); | |
4135 | if (ret != 0) { | |
76d7553f | 4136 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4137 | goto exit_dispatch; |
4138 | } | |
4139 | ||
4140 | /* Create thread to manage application registration. */ | |
4141 | ret = pthread_create(®_apps_thread, NULL, | |
4142 | thread_registration_apps, (void *) NULL); | |
4143 | if (ret != 0) { | |
76d7553f | 4144 | PERROR("pthread_create registration"); |
099e26bd DG |
4145 | goto exit_reg_apps; |
4146 | } | |
4147 | ||
cf3af59e | 4148 | /* Create thread to manage application socket */ |
54d01ffb DG |
4149 | ret = pthread_create(&apps_thread, NULL, |
4150 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4151 | if (ret != 0) { |
76d7553f | 4152 | PERROR("pthread_create apps"); |
cf3af59e MD |
4153 | goto exit_apps; |
4154 | } | |
fac6795d | 4155 | |
6620da75 DG |
4156 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4157 | if (is_root && !opt_no_kernel) { | |
4158 | /* Create kernel thread to manage kernel event */ | |
4159 | ret = pthread_create(&kernel_thread, NULL, | |
4160 | thread_manage_kernel, (void *) NULL); | |
4161 | if (ret != 0) { | |
4162 | PERROR("pthread_create kernel"); | |
4163 | goto exit_kernel; | |
4164 | } | |
7a485870 | 4165 | |
6620da75 DG |
4166 | ret = pthread_join(kernel_thread, &status); |
4167 | if (ret != 0) { | |
4168 | PERROR("pthread_join"); | |
4169 | goto error; /* join error, exit without cleanup */ | |
4170 | } | |
fac6795d DG |
4171 | } |
4172 | ||
cf3af59e MD |
4173 | exit_kernel: |
4174 | ret = pthread_join(apps_thread, &status); | |
4175 | if (ret != 0) { | |
76d7553f | 4176 | PERROR("pthread_join"); |
cf3af59e MD |
4177 | goto error; /* join error, exit without cleanup */ |
4178 | } | |
fac6795d | 4179 | |
cf3af59e | 4180 | exit_apps: |
099e26bd DG |
4181 | ret = pthread_join(reg_apps_thread, &status); |
4182 | if (ret != 0) { | |
76d7553f | 4183 | PERROR("pthread_join"); |
099e26bd DG |
4184 | goto error; /* join error, exit without cleanup */ |
4185 | } | |
4186 | ||
4187 | exit_reg_apps: | |
4188 | ret = pthread_join(dispatch_thread, &status); | |
4189 | if (ret != 0) { | |
76d7553f | 4190 | PERROR("pthread_join"); |
099e26bd DG |
4191 | goto error; /* join error, exit without cleanup */ |
4192 | } | |
4193 | ||
4194 | exit_dispatch: | |
cf3af59e MD |
4195 | ret = pthread_join(client_thread, &status); |
4196 | if (ret != 0) { | |
76d7553f | 4197 | PERROR("pthread_join"); |
cf3af59e MD |
4198 | goto error; /* join error, exit without cleanup */ |
4199 | } | |
4200 | ||
3bd1e081 | 4201 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4202 | if (ret != 0) { |
76d7553f | 4203 | PERROR("join_consumer"); |
cf3af59e MD |
4204 | goto error; /* join error, exit without cleanup */ |
4205 | } | |
a88df331 | 4206 | |
06f525de DG |
4207 | ret = join_consumer_thread(&ustconsumer32_data); |
4208 | if (ret != 0) { | |
4209 | PERROR("join_consumer ust32"); | |
4210 | goto error; /* join error, exit without cleanup */ | |
4211 | } | |
4212 | ||
4213 | ret = join_consumer_thread(&ustconsumer64_data); | |
4214 | if (ret != 0) { | |
4215 | PERROR("join_consumer ust64"); | |
4216 | goto error; /* join error, exit without cleanup */ | |
4217 | } | |
4218 | ||
cf3af59e | 4219 | exit_client: |
06f525de DG |
4220 | ret = pthread_join(health_thread, &status); |
4221 | if (ret != 0) { | |
4222 | PERROR("pthread_join health thread"); | |
4223 | goto error; /* join error, exit without cleanup */ | |
4224 | } | |
4225 | ||
44a5e5eb | 4226 | exit_health: |
a88df331 | 4227 | exit: |
cf3af59e MD |
4228 | /* |
4229 | * cleanup() is called when no other thread is running. | |
4230 | */ | |
f6a9efaa | 4231 | rcu_thread_online(); |
cf3af59e | 4232 | cleanup(); |
f6a9efaa DG |
4233 | rcu_thread_offline(); |
4234 | rcu_unregister_thread(); | |
67e40797 | 4235 | if (!ret) { |
cf3af59e | 4236 | exit(EXIT_SUCCESS); |
67e40797 | 4237 | } |
cf3af59e | 4238 | error: |
5e16da05 | 4239 | exit(EXIT_FAILURE); |
fac6795d | 4240 | } |