Commit | Line | Data |
---|---|---|
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> | |
331744e3 | 28 | #include <inttypes.h> |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c | 35 | #include <sys/wait.h> |
5c827ce0 | 36 | #include <urcu/uatomic.h> |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
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" |
7972aab2 | 49 | #include "buffer-registry.h" |
54d01ffb | 50 | #include "channel.h" |
2f77fc4b | 51 | #include "cmd.h" |
00e2e675 | 52 | #include "consumer.h" |
099e26bd | 53 | #include "context.h" |
54d01ffb | 54 | #include "event.h" |
4771f025 | 55 | #include "kernel.h" |
f1e16794 | 56 | #include "kernel-consumer.h" |
096102bd | 57 | #include "modprobe.h" |
0fdd1e2c | 58 | #include "shm.h" |
1e307fab | 59 | #include "ust-ctl.h" |
00e2e675 | 60 | #include "ust-consumer.h" |
8e68d1c8 | 61 | #include "utils.h" |
4063050c | 62 | #include "fd-limit.h" |
44a5e5eb | 63 | #include "health.h" |
8ac94142 | 64 | #include "testpoint.h" |
d0b96690 | 65 | #include "ust-thread.h" |
fac6795d | 66 | |
ebaeda94 MD |
67 | #define CONSUMERD_FILE "lttng-consumerd" |
68 | ||
75462a81 | 69 | /* Const values */ |
bbccc3d2 | 70 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab | 71 | |
fac6795d DG |
72 | const char *progname; |
73 | const char *opt_tracing_group; | |
35f90c40 | 74 | static const char *opt_pidfile; |
5b8719f5 | 75 | static int opt_sig_parent; |
97e19046 | 76 | static int opt_verbose_consumer; |
fac6795d | 77 | static int opt_daemon; |
4fba7219 | 78 | static int opt_no_kernel; |
fac6795d | 79 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 80 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 81 | static char *rundir; |
3bd1e081 | 82 | |
a23ec3a7 DG |
83 | /* |
84 | * Consumer daemon specific control data. Every value not initialized here is | |
85 | * set to 0 by the static definition. | |
86 | */ | |
3bd1e081 MD |
87 | static struct consumer_data kconsumer_data = { |
88 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
89 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
90 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
91 | .err_sock = -1, |
92 | .cmd_sock = -1, | |
331744e3 | 93 | .metadata_sock.fd = -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, | |
331744e3 | 105 | .metadata_sock.fd = -1, |
173af62f DG |
106 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
107 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
108 | .cond = PTHREAD_COND_INITIALIZER, |
109 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
110 | }; |
111 | static struct consumer_data ustconsumer32_data = { | |
112 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
113 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
114 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
115 | .err_sock = -1, |
116 | .cmd_sock = -1, | |
331744e3 | 117 | .metadata_sock.fd = -1, |
173af62f DG |
118 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
119 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
120 | .cond = PTHREAD_COND_INITIALIZER, |
121 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
122 | }; |
123 | ||
26c9d55e | 124 | /* Shared between threads */ |
099e26bd | 125 | static int dispatch_thread_exit; |
fac6795d | 126 | |
54d01ffb DG |
127 | /* Global application Unix socket path */ |
128 | static char apps_unix_sock_path[PATH_MAX]; | |
129 | /* Global client Unix socket path */ | |
130 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
131 | /* global wait shm path for UST */ |
132 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
133 | /* Global health check unix path */ |
134 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 135 | |
1d4b027a | 136 | /* Sockets and FDs */ |
a4b35e07 MD |
137 | static int client_sock = -1; |
138 | static int apps_sock = -1; | |
2f77fc4b | 139 | int kernel_tracer_fd = -1; |
76d7553f | 140 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 141 | |
273ea72c DG |
142 | /* |
143 | * Quit pipe for all threads. This permits a single cancellation point | |
144 | * for all threads when receiving an event on the pipe. | |
145 | */ | |
76d7553f | 146 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 147 | |
099e26bd DG |
148 | /* |
149 | * This pipe is used to inform the thread managing application communication | |
150 | * that a command is queued and ready to be processed. | |
151 | */ | |
76d7553f | 152 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 153 | |
d0b96690 DG |
154 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
155 | ||
1d4b027a | 156 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 157 | static pthread_t apps_thread; |
d0b96690 | 158 | static pthread_t apps_notify_thread; |
099e26bd | 159 | static pthread_t reg_apps_thread; |
1d4b027a | 160 | static pthread_t client_thread; |
7a485870 | 161 | static pthread_t kernel_thread; |
099e26bd | 162 | static pthread_t dispatch_thread; |
44a5e5eb | 163 | static pthread_t health_thread; |
0b2dc8df | 164 | static pthread_t ht_cleanup_thread; |
5eb91c98 | 165 | |
099e26bd DG |
166 | /* |
167 | * UST registration command queue. This queue is tied with a futex and uses a N | |
168 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
169 | * | |
170 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
171 | * this queue and the wait/wake scheme. | |
172 | */ | |
173 | static struct ust_cmd_queue ust_cmd_queue; | |
174 | ||
b5541356 DG |
175 | /* |
176 | * Pointer initialized before thread creation. | |
177 | * | |
178 | * This points to the tracing session list containing the session count and a | |
179 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
180 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 181 | * |
d063d709 | 182 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 183 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
184 | */ |
185 | static struct ltt_session_list *session_list_ptr; | |
186 | ||
7753dea8 MD |
187 | int ust_consumerd64_fd = -1; |
188 | int ust_consumerd32_fd = -1; | |
189 | ||
fb6f1fa2 YB |
190 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
191 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
192 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
193 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 194 | |
2f77fc4b DG |
195 | static const char *module_proc_lttng = "/proc/lttng"; |
196 | ||
5c827ce0 DG |
197 | /* |
198 | * Consumer daemon state which is changed when spawning it, killing it or in | |
199 | * case of a fatal error. | |
200 | */ | |
201 | enum consumerd_state { | |
202 | CONSUMER_STARTED = 1, | |
203 | CONSUMER_STOPPED = 2, | |
204 | CONSUMER_ERROR = 3, | |
205 | }; | |
206 | ||
207 | /* | |
208 | * This consumer daemon state is used to validate if a client command will be | |
209 | * able to reach the consumer. If not, the client is informed. For instance, | |
210 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
211 | * error to the client. | |
212 | * | |
213 | * The following example shows a possible race condition of this scheme: | |
214 | * | |
215 | * consumer thread error happens | |
216 | * client cmd arrives | |
217 | * client cmd checks state -> still OK | |
218 | * consumer thread exit, sets error | |
219 | * client cmd try to talk to consumer | |
220 | * ... | |
221 | * | |
222 | * However, since the consumer is a different daemon, we have no way of making | |
223 | * sure the command will reach it safely even with this state flag. This is why | |
224 | * we consider that up to the state validation during command processing, the | |
225 | * command is safe. After that, we can not guarantee the correctness of the | |
226 | * client request vis-a-vis the consumer. | |
227 | */ | |
228 | static enum consumerd_state ust_consumerd_state; | |
229 | static enum consumerd_state kernel_consumerd_state; | |
230 | ||
ae9e45b3 DG |
231 | /* |
232 | * Socket timeout for receiving and sending in seconds. | |
233 | */ | |
234 | static int app_socket_timeout; | |
235 | ||
12744796 DG |
236 | /* Set in main() with the current page size. */ |
237 | long page_size; | |
238 | ||
fb09408a | 239 | static |
7753dea8 | 240 | void setup_consumerd_path(void) |
fb09408a | 241 | { |
fc7a59ce | 242 | const char *bin, *libdir; |
fb09408a | 243 | |
7753dea8 MD |
244 | /* |
245 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
246 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
247 | * has not been defined. | |
7753dea8 | 248 | */ |
ebaeda94 | 249 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
250 | if (!consumerd32_bin[0]) { |
251 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
252 | } |
253 | if (!consumerd32_libdir[0]) { | |
254 | consumerd32_libdir = INSTALL_LIB_PATH; | |
255 | } | |
256 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
257 | if (!consumerd64_bin[0]) { |
258 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 259 | } |
ebaeda94 MD |
260 | if (!consumerd64_libdir[0]) { |
261 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
262 | } |
263 | #else | |
264 | #error "Unknown bitness" | |
265 | #endif | |
266 | ||
fb09408a MD |
267 | /* |
268 | * runtime env. var. overrides the build default. | |
269 | */ | |
fc7a59ce AM |
270 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
271 | if (bin) { | |
272 | consumerd32_bin = bin; | |
7753dea8 | 273 | } |
fc7a59ce AM |
274 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
275 | if (bin) { | |
276 | consumerd64_bin = bin; | |
ebaeda94 | 277 | } |
72f579ee | 278 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
279 | if (libdir) { |
280 | consumerd32_libdir = libdir; | |
281 | } | |
72f579ee | 282 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
283 | if (libdir) { |
284 | consumerd64_libdir = libdir; | |
fb09408a MD |
285 | } |
286 | } | |
287 | ||
5eb91c98 DG |
288 | /* |
289 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
290 | */ | |
d0b96690 | 291 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
292 | { |
293 | int ret; | |
294 | ||
d0b96690 | 295 | assert(events); |
5eb91c98 DG |
296 | |
297 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
298 | if (ret < 0) { | |
299 | goto error; | |
300 | } | |
301 | ||
302 | /* Add quit pipe */ | |
d0b96690 | 303 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
304 | if (ret < 0) { |
305 | goto error; | |
306 | } | |
307 | ||
308 | return 0; | |
309 | ||
310 | error: | |
311 | return ret; | |
312 | } | |
313 | ||
314 | /* | |
315 | * Check if the thread quit pipe was triggered. | |
316 | * | |
317 | * Return 1 if it was triggered else 0; | |
318 | */ | |
d0b96690 | 319 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
320 | { |
321 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
322 | return 1; | |
323 | } | |
324 | ||
325 | return 0; | |
326 | } | |
327 | ||
0fdd1e2c DG |
328 | /* |
329 | * Return group ID of the tracing group or -1 if not found. | |
330 | */ | |
996b65c8 MD |
331 | static gid_t allowed_group(void) |
332 | { | |
333 | struct group *grp; | |
334 | ||
274e143b MD |
335 | if (opt_tracing_group) { |
336 | grp = getgrnam(opt_tracing_group); | |
337 | } else { | |
338 | grp = getgrnam(default_tracing_group); | |
339 | } | |
996b65c8 MD |
340 | if (!grp) { |
341 | return -1; | |
342 | } else { | |
343 | return grp->gr_gid; | |
344 | } | |
345 | } | |
346 | ||
273ea72c | 347 | /* |
5eb91c98 | 348 | * Init thread quit pipe. |
273ea72c DG |
349 | * |
350 | * Return -1 on error or 0 if all pipes are created. | |
351 | */ | |
352 | static int init_thread_quit_pipe(void) | |
353 | { | |
730389d9 | 354 | int ret, i; |
273ea72c | 355 | |
730389d9 | 356 | ret = pipe(thread_quit_pipe); |
273ea72c | 357 | if (ret < 0) { |
730389d9 | 358 | PERROR("thread quit pipe"); |
273ea72c DG |
359 | goto error; |
360 | } | |
361 | ||
730389d9 DG |
362 | for (i = 0; i < 2; i++) { |
363 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
364 | if (ret < 0) { | |
365 | PERROR("fcntl"); | |
366 | goto error; | |
367 | } | |
368 | } | |
369 | ||
273ea72c DG |
370 | error: |
371 | return ret; | |
372 | } | |
373 | ||
099e26bd DG |
374 | /* |
375 | * Stop all threads by closing the thread quit pipe. | |
376 | */ | |
cf3af59e MD |
377 | static void stop_threads(void) |
378 | { | |
5eb91c98 DG |
379 | int ret; |
380 | ||
cf3af59e MD |
381 | /* Stopping all threads */ |
382 | DBG("Terminating all threads"); | |
54d01ffb | 383 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
384 | if (ret < 0) { |
385 | ERR("write error on thread quit pipe"); | |
386 | } | |
387 | ||
099e26bd | 388 | /* Dispatch thread */ |
26c9d55e | 389 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 390 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
391 | } |
392 | ||
fac6795d | 393 | /* |
d063d709 | 394 | * Cleanup the daemon |
fac6795d | 395 | */ |
cf3af59e | 396 | static void cleanup(void) |
fac6795d | 397 | { |
ef599319 | 398 | int ret; |
6620da75 | 399 | char *cmd = NULL; |
af9737e9 | 400 | struct ltt_session *sess, *stmp; |
fac6795d | 401 | |
1d4b027a | 402 | DBG("Cleaning up"); |
e07ae692 | 403 | |
2f77fc4b DG |
404 | /* First thing first, stop all threads */ |
405 | utils_close_pipe(thread_quit_pipe); | |
406 | ||
35f90c40 DG |
407 | /* |
408 | * If opt_pidfile is undefined, the default file will be wiped when | |
409 | * removing the rundir. | |
410 | */ | |
411 | if (opt_pidfile) { | |
412 | ret = remove(opt_pidfile); | |
413 | if (ret < 0) { | |
414 | PERROR("remove pidfile %s", opt_pidfile); | |
415 | } | |
416 | } | |
417 | ||
67e40797 DG |
418 | DBG("Removing %s directory", rundir); |
419 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
420 | if (ret < 0) { | |
421 | ERR("asprintf failed. Something is really wrong!"); | |
422 | } | |
5461b305 | 423 | |
67e40797 DG |
424 | /* Remove lttng run directory */ |
425 | ret = system(cmd); | |
426 | if (ret < 0) { | |
427 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 428 | } |
67e40797 | 429 | free(cmd); |
bd69add2 | 430 | free(rundir); |
5461b305 | 431 | |
99bab54f | 432 | DBG("Cleaning up all sessions"); |
fac6795d | 433 | |
b5541356 | 434 | /* Destroy session list mutex */ |
273ea72c DG |
435 | if (session_list_ptr != NULL) { |
436 | pthread_mutex_destroy(&session_list_ptr->lock); | |
437 | ||
438 | /* Cleanup ALL session */ | |
54d01ffb DG |
439 | cds_list_for_each_entry_safe(sess, stmp, |
440 | &session_list_ptr->head, list) { | |
2f77fc4b | 441 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
442 | } |
443 | } | |
444 | ||
099e26bd | 445 | DBG("Closing all UST sockets"); |
56fff090 | 446 | ust_app_clean_list(); |
7972aab2 | 447 | buffer_reg_destroy_registries(); |
099e26bd | 448 | |
4fba7219 DG |
449 | if (is_root && !opt_no_kernel) { |
450 | DBG2("Closing kernel fd"); | |
a4b35e07 | 451 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
452 | ret = close(kernel_tracer_fd); |
453 | if (ret) { | |
454 | PERROR("close"); | |
455 | } | |
a4b35e07 | 456 | } |
2f50c8a3 | 457 | DBG("Unloading kernel modules"); |
096102bd | 458 | modprobe_remove_lttng_all(); |
2f50c8a3 | 459 | } |
2f77fc4b | 460 | |
421cb601 | 461 | /* <fun> */ |
f56a39af | 462 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
463 | "Matthew, BEET driven development works!%c[%dm", |
464 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
465 | /* </fun> */ | |
fac6795d DG |
466 | } |
467 | ||
e065084a | 468 | /* |
d063d709 | 469 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 470 | * |
d063d709 | 471 | * Return lttcomm error code. |
e065084a DG |
472 | */ |
473 | static int send_unix_sock(int sock, void *buf, size_t len) | |
474 | { | |
475 | /* Check valid length */ | |
c617c0c6 | 476 | if (len == 0) { |
e065084a DG |
477 | return -1; |
478 | } | |
479 | ||
480 | return lttcomm_send_unix_sock(sock, buf, len); | |
481 | } | |
482 | ||
5461b305 | 483 | /* |
d063d709 | 484 | * Free memory of a command context structure. |
5461b305 | 485 | */ |
a2fb29a5 | 486 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 487 | { |
a2fb29a5 DG |
488 | DBG("Clean command context structure"); |
489 | if (*cmd_ctx) { | |
490 | if ((*cmd_ctx)->llm) { | |
491 | free((*cmd_ctx)->llm); | |
5461b305 | 492 | } |
a2fb29a5 DG |
493 | if ((*cmd_ctx)->lsm) { |
494 | free((*cmd_ctx)->lsm); | |
5461b305 | 495 | } |
a2fb29a5 DG |
496 | free(*cmd_ctx); |
497 | *cmd_ctx = NULL; | |
5461b305 DG |
498 | } |
499 | } | |
500 | ||
fac6795d | 501 | /* |
0fdd1e2c | 502 | * Notify UST applications using the shm mmap futex. |
fac6795d | 503 | */ |
0fdd1e2c | 504 | static int notify_ust_apps(int active) |
fac6795d | 505 | { |
0fdd1e2c | 506 | char *wait_shm_mmap; |
fac6795d | 507 | |
0fdd1e2c | 508 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 509 | |
0fdd1e2c DG |
510 | /* See shm.c for this call implying mmap, shm and futex calls */ |
511 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
512 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
513 | goto error; |
514 | } | |
515 | ||
0fdd1e2c DG |
516 | /* Wake waiting process */ |
517 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
518 | ||
519 | /* Apps notified successfully */ | |
520 | return 0; | |
fac6795d DG |
521 | |
522 | error: | |
0fdd1e2c | 523 | return -1; |
fac6795d DG |
524 | } |
525 | ||
e065084a | 526 | /* |
d063d709 DG |
527 | * Setup the outgoing data buffer for the response (llm) by allocating the |
528 | * right amount of memory and copying the original information from the lsm | |
529 | * structure. | |
ca95a216 | 530 | * |
d063d709 | 531 | * Return total size of the buffer pointed by buf. |
ca95a216 | 532 | */ |
5461b305 | 533 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 534 | { |
f3ed775e | 535 | int ret, buf_size; |
ca95a216 | 536 | |
f3ed775e | 537 | buf_size = size; |
5461b305 | 538 | |
ba7f0ae5 | 539 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 540 | if (cmd_ctx->llm == NULL) { |
76d7553f | 541 | PERROR("zmalloc"); |
5461b305 | 542 | ret = -ENOMEM; |
ca95a216 DG |
543 | goto error; |
544 | } | |
545 | ||
5461b305 DG |
546 | /* Copy common data */ |
547 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 548 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 549 | |
5461b305 DG |
550 | cmd_ctx->llm->data_size = size; |
551 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
552 | ||
ca95a216 DG |
553 | return buf_size; |
554 | ||
555 | error: | |
556 | return ret; | |
557 | } | |
558 | ||
7a485870 | 559 | /* |
5eb91c98 | 560 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 561 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 562 | */ |
5eb91c98 | 563 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 564 | { |
5eb91c98 | 565 | int ret; |
7a485870 DG |
566 | struct ltt_session *session; |
567 | struct ltt_kernel_channel *channel; | |
568 | ||
5eb91c98 | 569 | DBG("Updating kernel poll set"); |
7a485870 | 570 | |
54d01ffb | 571 | session_lock_list(); |
b5541356 | 572 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 573 | session_lock(session); |
7a485870 | 574 | if (session->kernel_session == NULL) { |
54d01ffb | 575 | session_unlock(session); |
7a485870 DG |
576 | continue; |
577 | } | |
7a485870 | 578 | |
54d01ffb DG |
579 | cds_list_for_each_entry(channel, |
580 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
581 | /* Add channel fd to the kernel poll set */ |
582 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
583 | if (ret < 0) { | |
54d01ffb | 584 | session_unlock(session); |
5eb91c98 DG |
585 | goto error; |
586 | } | |
587 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 588 | } |
54d01ffb | 589 | session_unlock(session); |
7a485870 | 590 | } |
54d01ffb | 591 | session_unlock_list(); |
7a485870 | 592 | |
5eb91c98 | 593 | return 0; |
7a485870 DG |
594 | |
595 | error: | |
54d01ffb | 596 | session_unlock_list(); |
7a485870 DG |
597 | return -1; |
598 | } | |
599 | ||
600 | /* | |
54d01ffb | 601 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 602 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 603 | * |
d063d709 | 604 | * Useful for CPU hotplug feature. |
7a485870 | 605 | */ |
2bdd86d4 | 606 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
607 | { |
608 | int ret = 0; | |
609 | struct ltt_session *session; | |
173af62f | 610 | struct ltt_kernel_session *ksess; |
7a485870 DG |
611 | struct ltt_kernel_channel *channel; |
612 | ||
613 | DBG("Updating kernel streams for channel fd %d", fd); | |
614 | ||
54d01ffb | 615 | session_lock_list(); |
b5541356 | 616 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 617 | session_lock(session); |
7a485870 | 618 | if (session->kernel_session == NULL) { |
54d01ffb | 619 | session_unlock(session); |
7a485870 DG |
620 | continue; |
621 | } | |
173af62f | 622 | ksess = session->kernel_session; |
d9800920 | 623 | |
173af62f | 624 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
625 | if (channel->fd == fd) { |
626 | DBG("Channel found, updating kernel streams"); | |
627 | ret = kernel_open_channel_stream(channel); | |
628 | if (ret < 0) { | |
b3c750d2 | 629 | goto error; |
7a485870 | 630 | } |
d9800920 | 631 | |
7a485870 | 632 | /* |
5eb91c98 DG |
633 | * Have we already sent fds to the consumer? If yes, it means |
634 | * that tracing is started so it is safe to send our updated | |
635 | * stream fds. | |
7a485870 | 636 | */ |
173af62f DG |
637 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
638 | struct lttng_ht_iter iter; | |
639 | struct consumer_socket *socket; | |
640 | ||
e7fe706f | 641 | rcu_read_lock(); |
173af62f DG |
642 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
643 | &iter.iter, socket, node.node) { | |
644 | /* Code flow error */ | |
645 | assert(socket->fd >= 0); | |
646 | ||
647 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 648 | ret = kernel_consumer_send_channel_stream(socket, |
173af62f DG |
649 | channel, ksess); |
650 | pthread_mutex_unlock(socket->lock); | |
651 | if (ret < 0) { | |
e7fe706f | 652 | rcu_read_unlock(); |
173af62f DG |
653 | goto error; |
654 | } | |
7a485870 | 655 | } |
e7fe706f | 656 | rcu_read_unlock(); |
7a485870 | 657 | } |
b3c750d2 | 658 | goto error; |
7a485870 DG |
659 | } |
660 | } | |
54d01ffb | 661 | session_unlock(session); |
7a485870 | 662 | } |
54d01ffb | 663 | session_unlock_list(); |
b3c750d2 | 664 | return ret; |
7a485870 | 665 | |
b3c750d2 | 666 | error: |
54d01ffb DG |
667 | session_unlock(session); |
668 | session_unlock_list(); | |
7a485870 DG |
669 | return ret; |
670 | } | |
671 | ||
487cf67c | 672 | /* |
ffe60014 DG |
673 | * For each tracing session, update newly registered apps. The session list |
674 | * lock MUST be acquired before calling this. | |
487cf67c DG |
675 | */ |
676 | static void update_ust_app(int app_sock) | |
677 | { | |
678 | struct ltt_session *sess, *stmp; | |
679 | ||
680 | /* For all tracing session(s) */ | |
681 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 682 | session_lock(sess); |
421cb601 DG |
683 | if (sess->ust_session) { |
684 | ust_app_global_update(sess->ust_session, app_sock); | |
685 | } | |
4ee14516 | 686 | session_unlock(sess); |
487cf67c DG |
687 | } |
688 | } | |
689 | ||
7a485870 | 690 | /* |
d063d709 | 691 | * This thread manage event coming from the kernel. |
7a485870 | 692 | * |
d063d709 DG |
693 | * Features supported in this thread: |
694 | * -) CPU Hotplug | |
7a485870 DG |
695 | */ |
696 | static void *thread_manage_kernel(void *data) | |
697 | { | |
139ac872 | 698 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 699 | uint32_t revents, nb_fd; |
7a485870 | 700 | char tmp; |
5eb91c98 | 701 | struct lttng_poll_event events; |
7a485870 | 702 | |
6993eeb3 | 703 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 704 | |
927ca06a DG |
705 | health_register(HEALTH_TYPE_KERNEL); |
706 | ||
d5d63bf1 DG |
707 | /* |
708 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 709 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 710 | */ |
6d737ce4 | 711 | lttng_poll_init(&events); |
d5d63bf1 | 712 | |
6993eeb3 CB |
713 | if (testpoint(thread_manage_kernel)) { |
714 | goto error_testpoint; | |
715 | } | |
8ac94142 | 716 | |
840cb59c | 717 | health_code_update(); |
44a5e5eb | 718 | |
6993eeb3 | 719 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 720 | goto error_testpoint; |
6993eeb3 CB |
721 | } |
722 | ||
7a485870 | 723 | while (1) { |
840cb59c | 724 | health_code_update(); |
44a5e5eb | 725 | |
7a485870 | 726 | if (update_poll_flag == 1) { |
d21b0d71 DG |
727 | /* Clean events object. We are about to populate it again. */ |
728 | lttng_poll_clean(&events); | |
729 | ||
d0b96690 | 730 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
731 | if (ret < 0) { |
732 | goto error_poll_create; | |
733 | } | |
734 | ||
735 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
736 | if (ret < 0) { | |
737 | goto error; | |
738 | } | |
5f822d0a | 739 | |
d21b0d71 | 740 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
741 | ret = update_kernel_poll(&events); |
742 | if (ret < 0) { | |
7a485870 DG |
743 | goto error; |
744 | } | |
745 | update_poll_flag = 0; | |
746 | } | |
747 | ||
d21b0d71 | 748 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
749 | |
750 | /* Poll infinite value of time */ | |
88f2b785 | 751 | restart: |
a78af745 | 752 | health_poll_entry(); |
5eb91c98 | 753 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 754 | health_poll_exit(); |
7a485870 | 755 | if (ret < 0) { |
88f2b785 MD |
756 | /* |
757 | * Restart interrupted system call. | |
758 | */ | |
759 | if (errno == EINTR) { | |
760 | goto restart; | |
761 | } | |
7a485870 DG |
762 | goto error; |
763 | } else if (ret == 0) { | |
764 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
765 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
766 | "This should not have happened! Continuing..."); | |
7a485870 DG |
767 | continue; |
768 | } | |
769 | ||
0d9c5d77 DG |
770 | nb_fd = ret; |
771 | ||
5eb91c98 DG |
772 | for (i = 0; i < nb_fd; i++) { |
773 | /* Fetch once the poll data */ | |
774 | revents = LTTNG_POLL_GETEV(&events, i); | |
775 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 776 | |
840cb59c | 777 | health_code_update(); |
44a5e5eb | 778 | |
5eb91c98 | 779 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 780 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 781 | if (ret) { |
139ac872 MD |
782 | err = 0; |
783 | goto exit; | |
5eb91c98 | 784 | } |
7a485870 | 785 | |
5eb91c98 DG |
786 | /* Check for data on kernel pipe */ |
787 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
f921c78f DG |
788 | do { |
789 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
790 | } while (ret < 0 && errno == EINTR); | |
791 | /* | |
792 | * Ret value is useless here, if this pipe gets any actions an | |
793 | * update is required anyway. | |
794 | */ | |
5eb91c98 DG |
795 | update_poll_flag = 1; |
796 | continue; | |
797 | } else { | |
798 | /* | |
799 | * New CPU detected by the kernel. Adding kernel stream to | |
800 | * kernel session and updating the kernel consumer | |
801 | */ | |
802 | if (revents & LPOLLIN) { | |
2bdd86d4 | 803 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
804 | if (ret < 0) { |
805 | continue; | |
806 | } | |
807 | break; | |
808 | /* | |
809 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
810 | * and unregister kernel stream at this point. | |
811 | */ | |
7a485870 | 812 | } |
7a485870 DG |
813 | } |
814 | } | |
815 | } | |
816 | ||
139ac872 | 817 | exit: |
7a485870 | 818 | error: |
5eb91c98 | 819 | lttng_poll_clean(&events); |
76d7553f | 820 | error_poll_create: |
6993eeb3 | 821 | error_testpoint: |
6620da75 DG |
822 | utils_close_pipe(kernel_poll_pipe); |
823 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 824 | if (err) { |
840cb59c | 825 | health_error(); |
139ac872 | 826 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
827 | WARN("Kernel thread died unexpectedly. " |
828 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 829 | } |
927ca06a | 830 | health_unregister(); |
76d7553f | 831 | DBG("Kernel thread dying"); |
7a485870 DG |
832 | return NULL; |
833 | } | |
834 | ||
a23ec3a7 DG |
835 | /* |
836 | * Signal pthread condition of the consumer data that the thread. | |
837 | */ | |
838 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
839 | { | |
840 | pthread_mutex_lock(&data->cond_mutex); | |
841 | ||
842 | /* | |
843 | * The state is set before signaling. It can be any value, it's the waiter | |
844 | * job to correctly interpret this condition variable associated to the | |
845 | * consumer pthread_cond. | |
846 | * | |
847 | * A value of 0 means that the corresponding thread of the consumer data | |
848 | * was not started. 1 indicates that the thread has started and is ready | |
849 | * for action. A negative value means that there was an error during the | |
850 | * thread bootstrap. | |
851 | */ | |
852 | data->consumer_thread_is_ready = state; | |
853 | (void) pthread_cond_signal(&data->cond); | |
854 | ||
855 | pthread_mutex_unlock(&data->cond_mutex); | |
856 | } | |
857 | ||
1d4b027a | 858 | /* |
3bd1e081 | 859 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 860 | */ |
3bd1e081 | 861 | static void *thread_manage_consumer(void *data) |
1d4b027a | 862 | { |
139ac872 | 863 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 864 | uint32_t revents, nb_fd; |
1d4b027a | 865 | enum lttcomm_return_code code; |
5eb91c98 | 866 | struct lttng_poll_event events; |
3bd1e081 | 867 | struct consumer_data *consumer_data = data; |
1d4b027a | 868 | |
3bd1e081 | 869 | DBG("[thread] Manage consumer started"); |
1d4b027a | 870 | |
927ca06a DG |
871 | health_register(HEALTH_TYPE_CONSUMER); |
872 | ||
855060f8 | 873 | health_code_update(); |
9449cc75 | 874 | |
5eb91c98 | 875 | /* |
331744e3 JD |
876 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
877 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 878 | */ |
331744e3 | 879 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 880 | if (ret < 0) { |
76d7553f | 881 | goto error_poll; |
5eb91c98 | 882 | } |
273ea72c | 883 | |
edb8b045 DG |
884 | /* |
885 | * The error socket here is already in a listening state which was done | |
886 | * just before spawning this thread to avoid a race between the consumer | |
887 | * daemon exec trying to connect and the listen() call. | |
888 | */ | |
3bd1e081 | 889 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
890 | if (ret < 0) { |
891 | goto error; | |
892 | } | |
893 | ||
840cb59c | 894 | health_code_update(); |
44a5e5eb | 895 | |
331744e3 | 896 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 897 | restart: |
a78af745 | 898 | health_poll_entry(); |
8ac94142 | 899 | |
6993eeb3 CB |
900 | if (testpoint(thread_manage_consumer)) { |
901 | goto error; | |
902 | } | |
8ac94142 | 903 | |
5eb91c98 | 904 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 905 | health_poll_exit(); |
273ea72c | 906 | if (ret < 0) { |
88f2b785 MD |
907 | /* |
908 | * Restart interrupted system call. | |
909 | */ | |
910 | if (errno == EINTR) { | |
911 | goto restart; | |
912 | } | |
273ea72c DG |
913 | goto error; |
914 | } | |
915 | ||
0d9c5d77 DG |
916 | nb_fd = ret; |
917 | ||
5eb91c98 DG |
918 | for (i = 0; i < nb_fd; i++) { |
919 | /* Fetch once the poll data */ | |
920 | revents = LTTNG_POLL_GETEV(&events, i); | |
921 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
922 | ||
840cb59c | 923 | health_code_update(); |
44a5e5eb | 924 | |
5eb91c98 | 925 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 926 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 927 | if (ret) { |
139ac872 MD |
928 | err = 0; |
929 | goto exit; | |
5eb91c98 DG |
930 | } |
931 | ||
932 | /* Event on the registration socket */ | |
3bd1e081 | 933 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 934 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 935 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
936 | goto error; |
937 | } | |
938 | } | |
273ea72c DG |
939 | } |
940 | ||
3bd1e081 | 941 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
942 | if (sock < 0) { |
943 | goto error; | |
944 | } | |
945 | ||
b662582b DG |
946 | /* |
947 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
948 | * show must go on. | |
949 | */ | |
950 | (void) utils_set_fd_cloexec(sock); | |
951 | ||
840cb59c | 952 | health_code_update(); |
44a5e5eb | 953 | |
3bd1e081 | 954 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 955 | |
712ea556 | 956 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
957 | ret = lttcomm_recv_unix_sock(sock, &code, |
958 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
959 | if (ret <= 0) { |
960 | goto error; | |
961 | } | |
962 | ||
840cb59c | 963 | health_code_update(); |
44a5e5eb | 964 | |
f73fabfd | 965 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 966 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
967 | consumer_data->cmd_sock = |
968 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
331744e3 JD |
969 | consumer_data->metadata_sock.fd = |
970 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
971 | if (consumer_data->cmd_sock < 0 || | |
972 | consumer_data->metadata_sock.fd < 0) { | |
973 | PERROR("consumer connect cmd socket"); | |
a23ec3a7 DG |
974 | /* On error, signal condition and quit. */ |
975 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
976 | goto error; |
977 | } | |
331744e3 JD |
978 | /* Create metadata socket lock. */ |
979 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
980 | if (consumer_data->metadata_sock.lock == NULL) { | |
981 | PERROR("zmalloc pthread mutex"); | |
982 | ret = -1; | |
983 | goto error; | |
984 | } | |
985 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
986 | ||
a23ec3a7 | 987 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
988 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
989 | DBG("Consumer metadata socket ready (fd: %d)", | |
990 | consumer_data->metadata_sock.fd); | |
1d4b027a | 991 | } else { |
3bd1e081 | 992 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
993 | lttcomm_get_readable_code(-code)); |
994 | goto error; | |
995 | } | |
996 | ||
331744e3 | 997 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 998 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 999 | if (ret < 0) { |
72079cae DG |
1000 | goto error; |
1001 | } | |
1002 | ||
331744e3 | 1003 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1004 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1005 | if (ret < 0) { | |
72079cae | 1006 | goto error; |
5eb91c98 DG |
1007 | } |
1008 | ||
331744e3 JD |
1009 | /* Add metadata socket that is successfully connected. */ |
1010 | ret = lttng_poll_add(&events, consumer_data->metadata_sock.fd, | |
1011 | LPOLLIN | LPOLLRDHUP); | |
1012 | if (ret < 0) { | |
1013 | goto error; | |
1014 | } | |
1015 | ||
840cb59c | 1016 | health_code_update(); |
44a5e5eb | 1017 | |
331744e3 | 1018 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1019 | restart_poll: |
331744e3 JD |
1020 | while (1) { |
1021 | health_poll_entry(); | |
1022 | ret = lttng_poll_wait(&events, -1); | |
1023 | health_poll_exit(); | |
1024 | if (ret < 0) { | |
1025 | /* | |
1026 | * Restart interrupted system call. | |
1027 | */ | |
1028 | if (errno == EINTR) { | |
1029 | goto restart_poll; | |
1030 | } | |
1031 | goto error; | |
88f2b785 | 1032 | } |
72079cae | 1033 | |
331744e3 | 1034 | nb_fd = ret; |
0d9c5d77 | 1035 | |
331744e3 JD |
1036 | for (i = 0; i < nb_fd; i++) { |
1037 | /* Fetch once the poll data */ | |
1038 | revents = LTTNG_POLL_GETEV(&events, i); | |
1039 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1040 | |
331744e3 | 1041 | health_code_update(); |
44a5e5eb | 1042 | |
331744e3 JD |
1043 | /* Thread quit pipe has been closed. Killing thread. */ |
1044 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1045 | if (ret) { | |
1046 | err = 0; | |
1047 | goto exit; | |
1048 | } | |
5eb91c98 | 1049 | |
331744e3 JD |
1050 | if (pollfd == sock) { |
1051 | /* Event on the consumerd socket */ | |
1052 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1053 | ERR("consumer err socket second poll error"); | |
1054 | goto error; | |
1055 | } | |
1056 | health_code_update(); | |
1057 | /* Wait for any kconsumerd error */ | |
1058 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1059 | sizeof(enum lttcomm_return_code)); | |
1060 | if (ret <= 0) { | |
1061 | ERR("consumer closed the command socket"); | |
1062 | goto error; | |
1063 | } | |
1064 | ||
1065 | ERR("consumer return code : %s", | |
1066 | lttcomm_get_readable_code(-code)); | |
1067 | ||
1068 | goto exit; | |
1069 | } else if (pollfd == consumer_data->metadata_sock.fd) { | |
1070 | /* UST metadata requests */ | |
1071 | ret = ust_consumer_metadata_request( | |
1072 | &consumer_data->metadata_sock); | |
1073 | if (ret < 0) { | |
1074 | ERR("Handling metadata request"); | |
1075 | goto error; | |
1076 | } | |
1077 | break; | |
1078 | } else { | |
1079 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1080 | goto error; |
1081 | } | |
1082 | } | |
331744e3 | 1083 | health_code_update(); |
5eb91c98 DG |
1084 | } |
1085 | ||
139ac872 | 1086 | exit: |
1d4b027a | 1087 | error: |
5c827ce0 DG |
1088 | /* Immediately set the consumerd state to stopped */ |
1089 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1090 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1091 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1092 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1093 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1094 | } else { | |
1095 | /* Code flow error... */ | |
1096 | assert(0); | |
1097 | } | |
1098 | ||
76d7553f MD |
1099 | if (consumer_data->err_sock >= 0) { |
1100 | ret = close(consumer_data->err_sock); | |
1101 | if (ret) { | |
1102 | PERROR("close"); | |
1103 | } | |
1104 | } | |
1105 | if (consumer_data->cmd_sock >= 0) { | |
1106 | ret = close(consumer_data->cmd_sock); | |
1107 | if (ret) { | |
1108 | PERROR("close"); | |
1109 | } | |
1110 | } | |
331744e3 JD |
1111 | if (consumer_data->metadata_sock.fd >= 0) { |
1112 | ret = close(consumer_data->metadata_sock.fd); | |
1113 | if (ret) { | |
1114 | PERROR("close"); | |
1115 | } | |
1116 | } | |
1117 | /* Cleanup metadata socket mutex. */ | |
1118 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1119 | free(consumer_data->metadata_sock.lock); | |
1120 | ||
76d7553f MD |
1121 | if (sock >= 0) { |
1122 | ret = close(sock); | |
1123 | if (ret) { | |
1124 | PERROR("close"); | |
1125 | } | |
1126 | } | |
273ea72c | 1127 | |
3bd1e081 MD |
1128 | unlink(consumer_data->err_unix_sock_path); |
1129 | unlink(consumer_data->cmd_unix_sock_path); | |
1130 | consumer_data->pid = 0; | |
1d4b027a | 1131 | |
5eb91c98 | 1132 | lttng_poll_clean(&events); |
76d7553f | 1133 | error_poll: |
139ac872 | 1134 | if (err) { |
840cb59c | 1135 | health_error(); |
139ac872 MD |
1136 | ERR("Health error occurred in %s", __func__); |
1137 | } | |
927ca06a | 1138 | health_unregister(); |
76d7553f | 1139 | DBG("consumer thread cleanup completed"); |
0177d773 | 1140 | |
5eb91c98 | 1141 | return NULL; |
099e26bd DG |
1142 | } |
1143 | ||
099e26bd DG |
1144 | /* |
1145 | * This thread manage application communication. | |
1d4b027a DG |
1146 | */ |
1147 | static void *thread_manage_apps(void *data) | |
099e26bd | 1148 | { |
139ac872 | 1149 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1150 | uint32_t revents, nb_fd; |
5eb91c98 | 1151 | struct lttng_poll_event events; |
099e26bd DG |
1152 | |
1153 | DBG("[thread] Manage application started"); | |
1154 | ||
f6a9efaa DG |
1155 | rcu_register_thread(); |
1156 | rcu_thread_online(); | |
1157 | ||
927ca06a DG |
1158 | health_register(HEALTH_TYPE_APP_MANAGE); |
1159 | ||
6993eeb3 CB |
1160 | if (testpoint(thread_manage_apps)) { |
1161 | goto error_testpoint; | |
1162 | } | |
1163 | ||
840cb59c | 1164 | health_code_update(); |
44a5e5eb | 1165 | |
d0b96690 | 1166 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1167 | if (ret < 0) { |
76d7553f | 1168 | goto error_poll_create; |
5eb91c98 | 1169 | } |
099e26bd | 1170 | |
5eb91c98 DG |
1171 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1172 | if (ret < 0) { | |
1173 | goto error; | |
1174 | } | |
099e26bd | 1175 | |
6993eeb3 CB |
1176 | if (testpoint(thread_manage_apps_before_loop)) { |
1177 | goto error; | |
1178 | } | |
8ac94142 | 1179 | |
840cb59c | 1180 | health_code_update(); |
44a5e5eb | 1181 | |
5eb91c98 | 1182 | while (1) { |
d21b0d71 | 1183 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1184 | |
1185 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1186 | restart: |
a78af745 | 1187 | health_poll_entry(); |
5eb91c98 | 1188 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1189 | health_poll_exit(); |
099e26bd | 1190 | if (ret < 0) { |
88f2b785 MD |
1191 | /* |
1192 | * Restart interrupted system call. | |
1193 | */ | |
1194 | if (errno == EINTR) { | |
1195 | goto restart; | |
1196 | } | |
099e26bd DG |
1197 | goto error; |
1198 | } | |
1199 | ||
0d9c5d77 DG |
1200 | nb_fd = ret; |
1201 | ||
5eb91c98 DG |
1202 | for (i = 0; i < nb_fd; i++) { |
1203 | /* Fetch once the poll data */ | |
1204 | revents = LTTNG_POLL_GETEV(&events, i); | |
1205 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1206 | ||
840cb59c | 1207 | health_code_update(); |
44a5e5eb | 1208 | |
5eb91c98 | 1209 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1210 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1211 | if (ret) { |
139ac872 MD |
1212 | err = 0; |
1213 | goto exit; | |
5eb91c98 | 1214 | } |
099e26bd | 1215 | |
5eb91c98 DG |
1216 | /* Inspect the apps cmd pipe */ |
1217 | if (pollfd == apps_cmd_pipe[0]) { | |
1218 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1219 | ERR("Apps command pipe error"); | |
0177d773 | 1220 | goto error; |
5eb91c98 | 1221 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1222 | int sock; |
1223 | ||
5eb91c98 | 1224 | /* Empty pipe */ |
f921c78f | 1225 | do { |
d0b96690 | 1226 | ret = read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
f921c78f | 1227 | } while (ret < 0 && errno == EINTR); |
d0b96690 | 1228 | if (ret < 0 || ret < sizeof(sock)) { |
76d7553f | 1229 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1230 | goto error; |
1231 | } | |
099e26bd | 1232 | |
840cb59c | 1233 | health_code_update(); |
44a5e5eb | 1234 | |
ffe60014 | 1235 | /* |
d0b96690 DG |
1236 | * We only monitor the error events of the socket. This |
1237 | * thread does not handle any incoming data from UST | |
1238 | * (POLLIN). | |
ffe60014 | 1239 | */ |
d0b96690 DG |
1240 | ret = lttng_poll_add(&events, sock, |
1241 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1242 | if (ret < 0) { | |
5eb91c98 | 1243 | goto error; |
e0c7ec2b | 1244 | } |
acc7b41b | 1245 | |
d0b96690 DG |
1246 | /* Set socket timeout for both receiving and ending */ |
1247 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1248 | app_socket_timeout); | |
1249 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1250 | app_socket_timeout); | |
ae9e45b3 | 1251 | |
d0b96690 | 1252 | DBG("Apps with sock %d added to poll set", sock); |
487cf67c | 1253 | |
840cb59c | 1254 | health_code_update(); |
44a5e5eb | 1255 | |
5eb91c98 | 1256 | break; |
0177d773 | 1257 | } |
5eb91c98 DG |
1258 | } else { |
1259 | /* | |
54d01ffb DG |
1260 | * At this point, we know that a registered application made |
1261 | * the event at poll_wait. | |
5eb91c98 DG |
1262 | */ |
1263 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1264 | /* Removing from the poll set */ | |
1265 | ret = lttng_poll_del(&events, pollfd); | |
1266 | if (ret < 0) { | |
1267 | goto error; | |
1268 | } | |
099e26bd | 1269 | |
b9d9b220 | 1270 | /* Socket closed on remote end. */ |
56fff090 | 1271 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1272 | break; |
1273 | } | |
099e26bd | 1274 | } |
44a5e5eb | 1275 | |
840cb59c | 1276 | health_code_update(); |
099e26bd | 1277 | } |
099e26bd DG |
1278 | } |
1279 | ||
139ac872 | 1280 | exit: |
099e26bd | 1281 | error: |
5eb91c98 | 1282 | lttng_poll_clean(&events); |
76d7553f | 1283 | error_poll_create: |
6993eeb3 | 1284 | error_testpoint: |
6620da75 DG |
1285 | utils_close_pipe(apps_cmd_pipe); |
1286 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1287 | ||
1288 | /* | |
1289 | * We don't clean the UST app hash table here since already registered | |
1290 | * applications can still be controlled so let them be until the session | |
1291 | * daemon dies or the applications stop. | |
1292 | */ | |
1293 | ||
139ac872 | 1294 | if (err) { |
840cb59c | 1295 | health_error(); |
139ac872 MD |
1296 | ERR("Health error occurred in %s", __func__); |
1297 | } | |
927ca06a | 1298 | health_unregister(); |
76d7553f | 1299 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1300 | rcu_thread_offline(); |
1301 | rcu_unregister_thread(); | |
099e26bd DG |
1302 | return NULL; |
1303 | } | |
1304 | ||
d0b96690 | 1305 | /* |
d88aee68 DG |
1306 | * Send a socket to a thread This is called from the dispatch UST registration |
1307 | * thread once all sockets are set for the application. | |
d0b96690 DG |
1308 | * |
1309 | * On success, return 0 else a negative value being the errno message of the | |
1310 | * write(). | |
1311 | */ | |
d88aee68 | 1312 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 DG |
1313 | { |
1314 | int ret; | |
1315 | ||
d0b96690 | 1316 | /* Sockets MUST be set or else this should not have been called. */ |
d88aee68 DG |
1317 | assert(fd >= 0); |
1318 | assert(sock >= 0); | |
d0b96690 DG |
1319 | |
1320 | do { | |
d88aee68 | 1321 | ret = write(fd, &sock, sizeof(sock)); |
d0b96690 | 1322 | } while (ret < 0 && errno == EINTR); |
d88aee68 DG |
1323 | if (ret < 0 || ret != sizeof(sock)) { |
1324 | PERROR("write apps pipe %d", fd); | |
d0b96690 DG |
1325 | if (ret < 0) { |
1326 | ret = -errno; | |
1327 | } | |
1328 | goto error; | |
1329 | } | |
1330 | ||
1331 | /* All good. Don't send back the write positive ret value. */ | |
1332 | ret = 0; | |
1333 | error: | |
1334 | return ret; | |
1335 | } | |
1336 | ||
099e26bd DG |
1337 | /* |
1338 | * Dispatch request from the registration threads to the application | |
1339 | * communication thread. | |
1340 | */ | |
1341 | static void *thread_dispatch_ust_registration(void *data) | |
1342 | { | |
12e2b881 | 1343 | int ret, err = -1; |
099e26bd DG |
1344 | struct cds_wfq_node *node; |
1345 | struct ust_command *ust_cmd = NULL; | |
d0b96690 DG |
1346 | struct { |
1347 | struct ust_app *app; | |
1348 | struct cds_list_head head; | |
d88aee68 | 1349 | } *wait_node = NULL, *tmp_wait_node; |
d0b96690 | 1350 | |
12e2b881 MD |
1351 | health_register(HEALTH_TYPE_APP_REG_DISPATCH); |
1352 | ||
1353 | health_code_update(); | |
1354 | ||
d0b96690 | 1355 | CDS_LIST_HEAD(wait_queue); |
099e26bd DG |
1356 | |
1357 | DBG("[thread] Dispatch UST command started"); | |
1358 | ||
26c9d55e | 1359 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1360 | health_code_update(); |
1361 | ||
099e26bd DG |
1362 | /* Atomically prepare the queue futex */ |
1363 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1364 | ||
1365 | do { | |
d0b96690 | 1366 | struct ust_app *app = NULL; |
7972aab2 | 1367 | ust_cmd = NULL; |
d0b96690 | 1368 | |
12e2b881 | 1369 | health_code_update(); |
099e26bd DG |
1370 | /* Dequeue command for registration */ |
1371 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1372 | if (node == NULL) { | |
00a17c97 | 1373 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1374 | /* Continue thread execution */ |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1379 | ||
2f50c8a3 DG |
1380 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1381 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1382 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1383 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1384 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1385 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1386 | |
1387 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1388 | wait_node = zmalloc(sizeof(*wait_node)); | |
1389 | if (!wait_node) { | |
1390 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1391 | ret = close(ust_cmd->sock); |
1392 | if (ret < 0) { | |
1393 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1394 | } | |
1395 | lttng_fd_put(1, LTTNG_FD_APPS); | |
7972aab2 | 1396 | free(ust_cmd); |
d0b96690 DG |
1397 | goto error; |
1398 | } | |
1399 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1400 | ||
1401 | /* Create application object if socket is CMD. */ | |
1402 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1403 | ust_cmd->sock); | |
1404 | if (!wait_node->app) { | |
1405 | ret = close(ust_cmd->sock); | |
1406 | if (ret < 0) { | |
1407 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1408 | } |
d88aee68 DG |
1409 | lttng_fd_put(1, LTTNG_FD_APPS); |
1410 | free(wait_node); | |
7972aab2 | 1411 | free(ust_cmd); |
d0b96690 DG |
1412 | continue; |
1413 | } | |
1414 | /* | |
1415 | * Add application to the wait queue so we can set the notify | |
1416 | * socket before putting this object in the global ht. | |
1417 | */ | |
1418 | cds_list_add(&wait_node->head, &wait_queue); | |
1419 | ||
7972aab2 | 1420 | free(ust_cmd); |
d0b96690 DG |
1421 | /* |
1422 | * We have to continue here since we don't have the notify | |
1423 | * socket and the application MUST be added to the hash table | |
1424 | * only at that moment. | |
1425 | */ | |
1426 | continue; | |
1427 | } else { | |
1428 | /* | |
1429 | * Look for the application in the local wait queue and set the | |
1430 | * notify socket if found. | |
1431 | */ | |
d88aee68 DG |
1432 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1433 | &wait_queue, head) { | |
12e2b881 | 1434 | health_code_update(); |
d0b96690 DG |
1435 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1436 | wait_node->app->notify_sock = ust_cmd->sock; | |
1437 | cds_list_del(&wait_node->head); | |
1438 | app = wait_node->app; | |
1439 | free(wait_node); | |
1440 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1441 | break; | |
1442 | } | |
1443 | } | |
020d7f60 DG |
1444 | |
1445 | /* | |
1446 | * With no application at this stage the received socket is | |
1447 | * basically useless so close it before we free the cmd data | |
1448 | * structure for good. | |
1449 | */ | |
1450 | if (!app) { | |
1451 | ret = close(ust_cmd->sock); | |
1452 | if (ret < 0) { | |
1453 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1454 | } | |
1455 | lttng_fd_put(1, LTTNG_FD_APPS); | |
1456 | } | |
7972aab2 | 1457 | free(ust_cmd); |
d0b96690 DG |
1458 | } |
1459 | ||
1460 | if (app) { | |
d0b96690 DG |
1461 | /* |
1462 | * @session_lock_list | |
1463 | * | |
1464 | * Lock the global session list so from the register up to the | |
1465 | * registration done message, no thread can see the application | |
1466 | * and change its state. | |
1467 | */ | |
1468 | session_lock_list(); | |
1469 | rcu_read_lock(); | |
d88aee68 | 1470 | |
d0b96690 DG |
1471 | /* |
1472 | * Add application to the global hash table. This needs to be | |
1473 | * done before the update to the UST registry can locate the | |
1474 | * application. | |
1475 | */ | |
1476 | ust_app_add(app); | |
d88aee68 DG |
1477 | |
1478 | /* Set app version. This call will print an error if needed. */ | |
1479 | (void) ust_app_version(app); | |
1480 | ||
1481 | /* Send notify socket through the notify pipe. */ | |
1482 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1483 | app->notify_sock); | |
1484 | if (ret < 0) { | |
1485 | rcu_read_unlock(); | |
1486 | session_unlock_list(); | |
1487 | /* No notify thread, stop the UST tracing. */ | |
1488 | goto error; | |
6620da75 | 1489 | } |
d88aee68 | 1490 | |
d0b96690 DG |
1491 | /* |
1492 | * Update newly registered application with the tracing | |
1493 | * registry info already enabled information. | |
1494 | */ | |
1495 | update_ust_app(app->sock); | |
d88aee68 DG |
1496 | |
1497 | /* | |
1498 | * Don't care about return value. Let the manage apps threads | |
1499 | * handle app unregistration upon socket close. | |
1500 | */ | |
1501 | (void) ust_app_register_done(app->sock); | |
1502 | ||
1503 | /* | |
1504 | * Even if the application socket has been closed, send the app | |
1505 | * to the thread and unregistration will take place at that | |
1506 | * place. | |
1507 | */ | |
1508 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1509 | if (ret < 0) { |
d88aee68 DG |
1510 | rcu_read_unlock(); |
1511 | session_unlock_list(); | |
1512 | /* No apps. thread, stop the UST tracing. */ | |
1513 | goto error; | |
d0b96690 | 1514 | } |
d88aee68 | 1515 | |
d0b96690 DG |
1516 | rcu_read_unlock(); |
1517 | session_unlock_list(); | |
099e26bd | 1518 | } |
099e26bd DG |
1519 | } while (node != NULL); |
1520 | ||
12e2b881 | 1521 | health_poll_entry(); |
099e26bd DG |
1522 | /* Futex wait on queue. Blocking call on futex() */ |
1523 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1524 | health_poll_exit(); |
099e26bd | 1525 | } |
12e2b881 MD |
1526 | /* Normal exit, no error */ |
1527 | err = 0; | |
099e26bd DG |
1528 | |
1529 | error: | |
d88aee68 DG |
1530 | /* Clean up wait queue. */ |
1531 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1532 | &wait_queue, head) { | |
1533 | cds_list_del(&wait_node->head); | |
1534 | free(wait_node); | |
1535 | } | |
1536 | ||
099e26bd | 1537 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1538 | if (err) { |
1539 | health_error(); | |
1540 | ERR("Health error occurred in %s", __func__); | |
1541 | } | |
1542 | health_unregister(); | |
099e26bd DG |
1543 | return NULL; |
1544 | } | |
1545 | ||
1546 | /* | |
1547 | * This thread manage application registration. | |
1548 | */ | |
1549 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1550 | { |
139ac872 | 1551 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1552 | uint32_t revents, nb_fd; |
1553 | struct lttng_poll_event events; | |
099e26bd DG |
1554 | /* |
1555 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1556 | * freed in the manage apps thread. | |
1557 | */ | |
1558 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1559 | |
099e26bd | 1560 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1561 | |
927ca06a DG |
1562 | health_register(HEALTH_TYPE_APP_REG); |
1563 | ||
6993eeb3 CB |
1564 | if (testpoint(thread_registration_apps)) { |
1565 | goto error_testpoint; | |
1566 | } | |
8ac94142 | 1567 | |
1d4b027a DG |
1568 | ret = lttcomm_listen_unix_sock(apps_sock); |
1569 | if (ret < 0) { | |
76d7553f | 1570 | goto error_listen; |
1d4b027a DG |
1571 | } |
1572 | ||
5eb91c98 DG |
1573 | /* |
1574 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1575 | * more will be added to this poll set. | |
1576 | */ | |
d0b96690 | 1577 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1578 | if (ret < 0) { |
76d7553f | 1579 | goto error_create_poll; |
5eb91c98 | 1580 | } |
273ea72c | 1581 | |
5eb91c98 DG |
1582 | /* Add the application registration socket */ |
1583 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1584 | if (ret < 0) { | |
76d7553f | 1585 | goto error_poll_add; |
5eb91c98 | 1586 | } |
273ea72c | 1587 | |
1d4b027a | 1588 | /* Notify all applications to register */ |
0fdd1e2c DG |
1589 | ret = notify_ust_apps(1); |
1590 | if (ret < 0) { | |
1591 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1592 | "Execution continues but there might be problem for already\n" |
1593 | "running applications that wishes to register."); | |
0fdd1e2c | 1594 | } |
1d4b027a DG |
1595 | |
1596 | while (1) { | |
1597 | DBG("Accepting application registration"); | |
273ea72c DG |
1598 | |
1599 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1600 | restart: |
a78af745 | 1601 | health_poll_entry(); |
5eb91c98 | 1602 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1603 | health_poll_exit(); |
273ea72c | 1604 | if (ret < 0) { |
88f2b785 MD |
1605 | /* |
1606 | * Restart interrupted system call. | |
1607 | */ | |
1608 | if (errno == EINTR) { | |
1609 | goto restart; | |
1610 | } | |
273ea72c DG |
1611 | goto error; |
1612 | } | |
1613 | ||
0d9c5d77 DG |
1614 | nb_fd = ret; |
1615 | ||
5eb91c98 | 1616 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1617 | health_code_update(); |
139ac872 | 1618 | |
5eb91c98 DG |
1619 | /* Fetch once the poll data */ |
1620 | revents = LTTNG_POLL_GETEV(&events, i); | |
1621 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1622 | |
5eb91c98 | 1623 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1624 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1625 | if (ret) { |
139ac872 MD |
1626 | err = 0; |
1627 | goto exit; | |
90014c57 | 1628 | } |
1d4b027a | 1629 | |
5eb91c98 DG |
1630 | /* Event on the registration socket */ |
1631 | if (pollfd == apps_sock) { | |
1632 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1633 | ERR("Register apps socket poll error"); | |
1634 | goto error; | |
1635 | } else if (revents & LPOLLIN) { | |
1636 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1637 | if (sock < 0) { | |
1638 | goto error; | |
1639 | } | |
099e26bd | 1640 | |
b662582b DG |
1641 | /* |
1642 | * Set the CLOEXEC flag. Return code is useless because | |
1643 | * either way, the show must go on. | |
1644 | */ | |
1645 | (void) utils_set_fd_cloexec(sock); | |
1646 | ||
5eb91c98 | 1647 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1648 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1649 | if (ust_cmd == NULL) { |
76d7553f | 1650 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1651 | goto error; |
1652 | } | |
1d4b027a | 1653 | |
5eb91c98 DG |
1654 | /* |
1655 | * Using message-based transmissions to ensure we don't | |
1656 | * have to deal with partially received messages. | |
1657 | */ | |
4063050c MD |
1658 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1659 | if (ret < 0) { | |
1660 | ERR("Exhausted file descriptors allowed for applications."); | |
1661 | free(ust_cmd); | |
1662 | ret = close(sock); | |
1663 | if (ret) { | |
1664 | PERROR("close"); | |
1665 | } | |
1666 | sock = -1; | |
1667 | continue; | |
1668 | } | |
d88aee68 | 1669 | |
840cb59c | 1670 | health_code_update(); |
d0b96690 DG |
1671 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1672 | if (ret < 0) { | |
5eb91c98 | 1673 | free(ust_cmd); |
d0b96690 | 1674 | /* Close socket of the application. */ |
76d7553f MD |
1675 | ret = close(sock); |
1676 | if (ret) { | |
1677 | PERROR("close"); | |
1678 | } | |
4063050c | 1679 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1680 | sock = -1; |
5eb91c98 DG |
1681 | continue; |
1682 | } | |
840cb59c | 1683 | health_code_update(); |
099e26bd | 1684 | |
5eb91c98 | 1685 | ust_cmd->sock = sock; |
34a2494f | 1686 | sock = -1; |
099e26bd | 1687 | |
5eb91c98 DG |
1688 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1689 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1690 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1691 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1692 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1693 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1694 | |
5eb91c98 DG |
1695 | /* |
1696 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1697 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1698 | */ |
1699 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1700 | ||
1701 | /* | |
1702 | * Wake the registration queue futex. Implicit memory | |
1703 | * barrier with the exchange in cds_wfq_enqueue. | |
1704 | */ | |
1705 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1706 | } | |
1707 | } | |
90014c57 | 1708 | } |
1d4b027a DG |
1709 | } |
1710 | ||
139ac872 | 1711 | exit: |
1d4b027a | 1712 | error: |
139ac872 | 1713 | if (err) { |
840cb59c | 1714 | health_error(); |
139ac872 MD |
1715 | ERR("Health error occurred in %s", __func__); |
1716 | } | |
139ac872 | 1717 | |
0fdd1e2c DG |
1718 | /* Notify that the registration thread is gone */ |
1719 | notify_ust_apps(0); | |
1720 | ||
a4b35e07 | 1721 | if (apps_sock >= 0) { |
76d7553f MD |
1722 | ret = close(apps_sock); |
1723 | if (ret) { | |
1724 | PERROR("close"); | |
1725 | } | |
a4b35e07 | 1726 | } |
46c3f085 | 1727 | if (sock >= 0) { |
76d7553f MD |
1728 | ret = close(sock); |
1729 | if (ret) { | |
1730 | PERROR("close"); | |
1731 | } | |
4063050c | 1732 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1733 | } |
273ea72c | 1734 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1735 | |
76d7553f | 1736 | error_poll_add: |
5eb91c98 | 1737 | lttng_poll_clean(&events); |
76d7553f MD |
1738 | error_listen: |
1739 | error_create_poll: | |
6993eeb3 | 1740 | error_testpoint: |
76d7553f | 1741 | DBG("UST Registration thread cleanup complete"); |
927ca06a | 1742 | health_unregister(); |
5eb91c98 | 1743 | |
1d4b027a DG |
1744 | return NULL; |
1745 | } | |
1746 | ||
8c0faa1d | 1747 | /* |
3bd1e081 | 1748 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1749 | * exec or it will fails. |
8c0faa1d | 1750 | */ |
3bd1e081 | 1751 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1752 | { |
a23ec3a7 | 1753 | int ret, clock_ret; |
ee0b0061 DG |
1754 | struct timespec timeout; |
1755 | ||
a23ec3a7 DG |
1756 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1757 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1758 | |
a23ec3a7 DG |
1759 | /* Setup pthread condition */ |
1760 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1761 | if (ret != 0) { | |
1762 | errno = ret; | |
1763 | PERROR("pthread_condattr_init consumer data"); | |
1764 | goto error; | |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1769 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1770 | * for a more details and how we noticed it. | |
1771 | */ | |
1772 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1773 | if (ret != 0) { | |
1774 | errno = ret; | |
1775 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1776 | goto error; |
1777 | } | |
8c0faa1d | 1778 | |
a23ec3a7 DG |
1779 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1780 | if (ret != 0) { | |
1781 | errno = ret; | |
1782 | PERROR("pthread_cond_init consumer data"); | |
1783 | goto error; | |
1784 | } | |
1785 | ||
1786 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1787 | consumer_data); | |
8c0faa1d | 1788 | if (ret != 0) { |
3bd1e081 | 1789 | PERROR("pthread_create consumer"); |
ee0b0061 | 1790 | ret = -1; |
8c0faa1d DG |
1791 | goto error; |
1792 | } | |
1793 | ||
a23ec3a7 DG |
1794 | /* We are about to wait on a pthread condition */ |
1795 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1796 | ||
ee0b0061 | 1797 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1798 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1799 | /* | |
1800 | * Set the timeout for the condition timed wait even if the clock gettime | |
1801 | * call fails since we might loop on that call and we want to avoid to | |
1802 | * increment the timeout too many times. | |
1803 | */ | |
1804 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1805 | ||
1806 | /* | |
1807 | * The following loop COULD be skipped in some conditions so this is why we | |
1808 | * set ret to 0 in order to make sure at least one round of the loop is | |
1809 | * done. | |
1810 | */ | |
1811 | ret = 0; | |
1812 | ||
1813 | /* | |
1814 | * Loop until the condition is reached or when a timeout is reached. Note | |
1815 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1816 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1817 | * possible. This loop does not take any chances and works with both of | |
1818 | * them. | |
1819 | */ | |
1820 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1821 | if (clock_ret < 0) { | |
1822 | PERROR("clock_gettime spawn consumer"); | |
1823 | /* Infinite wait for the consumerd thread to be ready */ | |
1824 | ret = pthread_cond_wait(&consumer_data->cond, | |
1825 | &consumer_data->cond_mutex); | |
1826 | } else { | |
1827 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1828 | &consumer_data->cond_mutex, &timeout); | |
1829 | } | |
ee0b0061 | 1830 | } |
8c0faa1d | 1831 | |
a23ec3a7 DG |
1832 | /* Release the pthread condition */ |
1833 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1834 | ||
1835 | if (ret != 0) { | |
1836 | errno = ret; | |
1837 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1838 | /* |
1839 | * Call has timed out so we kill the kconsumerd_thread and return | |
1840 | * an error. | |
1841 | */ | |
a23ec3a7 DG |
1842 | ERR("Condition timed out. The consumer thread was never ready." |
1843 | " Killing it"); | |
3bd1e081 | 1844 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1845 | if (ret < 0) { |
3bd1e081 | 1846 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1847 | } |
1848 | } else { | |
a23ec3a7 | 1849 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1850 | } |
1851 | goto error; | |
1852 | } | |
1853 | ||
3bd1e081 MD |
1854 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1855 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1856 | ERR("Consumerd did not start"); |
3bd1e081 | 1857 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1858 | goto error; |
1859 | } | |
3bd1e081 | 1860 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1861 | |
8c0faa1d DG |
1862 | return 0; |
1863 | ||
1864 | error: | |
1865 | return ret; | |
1866 | } | |
1867 | ||
d9800920 | 1868 | /* |
3bd1e081 | 1869 | * Join consumer thread |
d9800920 | 1870 | */ |
3bd1e081 | 1871 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1872 | { |
1873 | void *status; | |
cf3af59e | 1874 | |
e8209f6b DG |
1875 | /* Consumer pid must be a real one. */ |
1876 | if (consumer_data->pid > 0) { | |
c617c0c6 | 1877 | int ret; |
3bd1e081 | 1878 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1879 | if (ret) { |
3bd1e081 | 1880 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1881 | return ret; |
1882 | } | |
3bd1e081 | 1883 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1884 | } else { |
1885 | return 0; | |
1886 | } | |
1887 | } | |
1888 | ||
8c0faa1d | 1889 | /* |
3bd1e081 | 1890 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1891 | * |
d063d709 | 1892 | * Return pid if successful else -1. |
8c0faa1d | 1893 | */ |
3bd1e081 | 1894 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1895 | { |
1896 | int ret; | |
1897 | pid_t pid; | |
94c55f17 | 1898 | const char *consumer_to_use; |
53086306 | 1899 | const char *verbosity; |
94c55f17 | 1900 | struct stat st; |
8c0faa1d | 1901 | |
3bd1e081 | 1902 | DBG("Spawning consumerd"); |
c49dc785 | 1903 | |
8c0faa1d DG |
1904 | pid = fork(); |
1905 | if (pid == 0) { | |
1906 | /* | |
3bd1e081 | 1907 | * Exec consumerd. |
8c0faa1d | 1908 | */ |
daee5345 | 1909 | if (opt_verbose_consumer) { |
53086306 DG |
1910 | verbosity = "--verbose"; |
1911 | } else { | |
1912 | verbosity = "--quiet"; | |
1913 | } | |
3bd1e081 MD |
1914 | switch (consumer_data->type) { |
1915 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1916 | /* |
c7704d57 DG |
1917 | * Find out which consumerd to execute. We will first try the |
1918 | * 64-bit path, then the sessiond's installation directory, and | |
1919 | * fallback on the 32-bit one, | |
94c55f17 | 1920 | */ |
63a799e8 AM |
1921 | DBG3("Looking for a kernel consumer at these locations:"); |
1922 | DBG3(" 1) %s", consumerd64_bin); | |
1923 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1924 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1925 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1926 | DBG3("Found location #1"); |
94c55f17 | 1927 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1928 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1929 | DBG3("Found location #2"); |
94c55f17 | 1930 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1931 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1932 | DBG3("Found location #3"); |
eb1e0bd4 | 1933 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1934 | } else { |
63a799e8 | 1935 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1936 | break; |
1937 | } | |
1938 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1939 | execl(consumer_to_use, | |
1940 | "lttng-consumerd", verbosity, "-k", | |
1941 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1942 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1943 | NULL); | |
3bd1e081 | 1944 | break; |
7753dea8 MD |
1945 | case LTTNG_CONSUMER64_UST: |
1946 | { | |
b1e0b6b6 | 1947 | char *tmpnew = NULL; |
8f4905da MD |
1948 | |
1949 | if (consumerd64_libdir[0] != '\0') { | |
1950 | char *tmp; | |
1951 | size_t tmplen; | |
1952 | ||
1953 | tmp = getenv("LD_LIBRARY_PATH"); | |
1954 | if (!tmp) { | |
1955 | tmp = ""; | |
1956 | } | |
1957 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1958 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1959 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1960 | if (!tmpnew) { | |
1961 | ret = -ENOMEM; | |
1962 | goto error; | |
1963 | } | |
1964 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1965 | strcat(tmpnew, consumerd64_libdir); | |
1966 | if (tmp[0] != '\0') { | |
1967 | strcat(tmpnew, ":"); | |
1968 | strcat(tmpnew, tmp); | |
1969 | } | |
1970 | ret = putenv(tmpnew); | |
1971 | if (ret) { | |
1972 | ret = -errno; | |
c6f76da9 | 1973 | free(tmpnew); |
8f4905da MD |
1974 | goto error; |
1975 | } | |
1976 | } | |
94c55f17 | 1977 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1978 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1979 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1980 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1981 | NULL); | |
8f4905da MD |
1982 | if (consumerd64_libdir[0] != '\0') { |
1983 | free(tmpnew); | |
1984 | } | |
1985 | if (ret) { | |
1986 | goto error; | |
1987 | } | |
3bd1e081 | 1988 | break; |
7753dea8 MD |
1989 | } |
1990 | case LTTNG_CONSUMER32_UST: | |
1991 | { | |
937dde8e | 1992 | char *tmpnew = NULL; |
8f4905da MD |
1993 | |
1994 | if (consumerd32_libdir[0] != '\0') { | |
1995 | char *tmp; | |
1996 | size_t tmplen; | |
1997 | ||
1998 | tmp = getenv("LD_LIBRARY_PATH"); | |
1999 | if (!tmp) { | |
2000 | tmp = ""; | |
2001 | } | |
2002 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2003 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2004 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2005 | if (!tmpnew) { | |
2006 | ret = -ENOMEM; | |
2007 | goto error; | |
2008 | } | |
2009 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2010 | strcat(tmpnew, consumerd32_libdir); | |
2011 | if (tmp[0] != '\0') { | |
2012 | strcat(tmpnew, ":"); | |
2013 | strcat(tmpnew, tmp); | |
2014 | } | |
2015 | ret = putenv(tmpnew); | |
2016 | if (ret) { | |
2017 | ret = -errno; | |
c6f76da9 | 2018 | free(tmpnew); |
8f4905da MD |
2019 | goto error; |
2020 | } | |
2021 | } | |
94c55f17 | 2022 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2023 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2024 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2025 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2026 | NULL); | |
8f4905da MD |
2027 | if (consumerd32_libdir[0] != '\0') { |
2028 | free(tmpnew); | |
2029 | } | |
2030 | if (ret) { | |
2031 | goto error; | |
2032 | } | |
7753dea8 MD |
2033 | break; |
2034 | } | |
3bd1e081 | 2035 | default: |
76d7553f | 2036 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2037 | exit(EXIT_FAILURE); |
2038 | } | |
8c0faa1d | 2039 | if (errno != 0) { |
76d7553f | 2040 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2041 | } |
2042 | exit(EXIT_FAILURE); | |
2043 | } else if (pid > 0) { | |
2044 | ret = pid; | |
8c0faa1d | 2045 | } else { |
76d7553f | 2046 | PERROR("start consumer fork"); |
8c0faa1d | 2047 | ret = -errno; |
8c0faa1d | 2048 | } |
8f4905da | 2049 | error: |
8c0faa1d DG |
2050 | return ret; |
2051 | } | |
2052 | ||
693bd40b | 2053 | /* |
3bd1e081 | 2054 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2055 | */ |
3bd1e081 | 2056 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2057 | { |
c617c0c6 | 2058 | int ret; |
edb8b045 DG |
2059 | |
2060 | /* | |
2061 | * Set the listen() state on the socket since there is a possible race | |
2062 | * between the exec() of the consumer daemon and this call if place in the | |
2063 | * consumer thread. See bug #366 for more details. | |
2064 | */ | |
2065 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2066 | if (ret < 0) { | |
2067 | goto error; | |
2068 | } | |
693bd40b | 2069 | |
3bd1e081 MD |
2070 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2071 | if (consumer_data->pid != 0) { | |
2072 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2073 | goto end; |
2074 | } | |
693bd40b | 2075 | |
3bd1e081 | 2076 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2077 | if (ret < 0) { |
3bd1e081 MD |
2078 | ERR("Spawning consumerd failed"); |
2079 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2080 | goto error; |
693bd40b | 2081 | } |
c49dc785 | 2082 | |
3bd1e081 MD |
2083 | /* Setting up the consumer_data pid */ |
2084 | consumer_data->pid = ret; | |
48842b30 | 2085 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2086 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2087 | |
3bd1e081 MD |
2088 | DBG2("Spawning consumer control thread"); |
2089 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2090 | if (ret < 0) { |
3bd1e081 | 2091 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2092 | goto error; |
2093 | } | |
2094 | ||
c49dc785 | 2095 | end: |
693bd40b DG |
2096 | return 0; |
2097 | ||
2098 | error: | |
331744e3 | 2099 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2100 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2101 | int err; |
2102 | ||
edb8b045 DG |
2103 | err = close(consumer_data->err_sock); |
2104 | if (err < 0) { | |
2105 | PERROR("close consumer data error socket"); | |
2106 | } | |
2107 | } | |
693bd40b DG |
2108 | return ret; |
2109 | } | |
2110 | ||
44a5e5eb | 2111 | /* |
139ac872 MD |
2112 | * Compute health status of each consumer. If one of them is zero (bad |
2113 | * state), we return 0. | |
44a5e5eb DG |
2114 | */ |
2115 | static int check_consumer_health(void) | |
2116 | { | |
2117 | int ret; | |
2118 | ||
927ca06a | 2119 | ret = health_check_state(HEALTH_TYPE_CONSUMER); |
44a5e5eb DG |
2120 | |
2121 | DBG3("Health consumer check %d", ret); | |
2122 | ||
2123 | return ret; | |
2124 | } | |
2125 | ||
b73401da | 2126 | /* |
096102bd | 2127 | * Setup necessary data for kernel tracer action. |
b73401da | 2128 | */ |
096102bd | 2129 | static int init_kernel_tracer(void) |
b73401da DG |
2130 | { |
2131 | int ret; | |
b73401da | 2132 | |
096102bd DG |
2133 | /* Modprobe lttng kernel modules */ |
2134 | ret = modprobe_lttng_control(); | |
b73401da | 2135 | if (ret < 0) { |
b73401da DG |
2136 | goto error; |
2137 | } | |
2138 | ||
096102bd DG |
2139 | /* Open debugfs lttng */ |
2140 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2141 | if (kernel_tracer_fd < 0) { | |
2142 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2143 | ret = -1; |
2144 | goto error_open; | |
54d01ffb DG |
2145 | } |
2146 | ||
2f77fc4b DG |
2147 | /* Validate kernel version */ |
2148 | ret = kernel_validate_version(kernel_tracer_fd); | |
2149 | if (ret < 0) { | |
2150 | goto error_version; | |
b551a063 | 2151 | } |
54d01ffb | 2152 | |
2f77fc4b DG |
2153 | ret = modprobe_lttng_data(); |
2154 | if (ret < 0) { | |
2155 | goto error_modules; | |
54d01ffb DG |
2156 | } |
2157 | ||
2f77fc4b DG |
2158 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2159 | return 0; | |
2160 | ||
2161 | error_version: | |
2162 | modprobe_remove_lttng_control(); | |
2163 | ret = close(kernel_tracer_fd); | |
2164 | if (ret) { | |
2165 | PERROR("close"); | |
b551a063 | 2166 | } |
2f77fc4b | 2167 | kernel_tracer_fd = -1; |
f73fabfd | 2168 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2169 | |
2f77fc4b DG |
2170 | error_modules: |
2171 | ret = close(kernel_tracer_fd); | |
2172 | if (ret) { | |
2173 | PERROR("close"); | |
b551a063 | 2174 | } |
54d01ffb | 2175 | |
2f77fc4b DG |
2176 | error_open: |
2177 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2178 | |
2179 | error: | |
2f77fc4b DG |
2180 | WARN("No kernel tracer available"); |
2181 | kernel_tracer_fd = -1; | |
2182 | if (!is_root) { | |
f73fabfd | 2183 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2184 | } else { |
f73fabfd | 2185 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2186 | } |
54d01ffb DG |
2187 | } |
2188 | ||
2f77fc4b | 2189 | |
54d01ffb | 2190 | /* |
2f77fc4b DG |
2191 | * Copy consumer output from the tracing session to the domain session. The |
2192 | * function also applies the right modification on a per domain basis for the | |
2193 | * trace files destination directory. | |
36b588ed MD |
2194 | * |
2195 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2196 | */ |
2f77fc4b | 2197 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2198 | { |
2199 | int ret; | |
2f77fc4b DG |
2200 | const char *dir_name; |
2201 | struct consumer_output *consumer; | |
2202 | ||
2203 | assert(session); | |
2204 | assert(session->consumer); | |
54d01ffb | 2205 | |
b551a063 DG |
2206 | switch (domain) { |
2207 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2208 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2209 | /* |
2210 | * XXX: We should audit the session creation and what this function | |
2211 | * does "extra" in order to avoid a destroy since this function is used | |
2212 | * in the domain session creation (kernel and ust) only. Same for UST | |
2213 | * domain. | |
2214 | */ | |
2215 | if (session->kernel_session->consumer) { | |
2216 | consumer_destroy_output(session->kernel_session->consumer); | |
2217 | } | |
2f77fc4b DG |
2218 | session->kernel_session->consumer = |
2219 | consumer_copy_output(session->consumer); | |
2220 | /* Ease our life a bit for the next part */ | |
2221 | consumer = session->kernel_session->consumer; | |
2222 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2223 | break; |
2224 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2225 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2226 | if (session->ust_session->consumer) { |
2227 | consumer_destroy_output(session->ust_session->consumer); | |
2228 | } | |
2f77fc4b DG |
2229 | session->ust_session->consumer = |
2230 | consumer_copy_output(session->consumer); | |
2231 | /* Ease our life a bit for the next part */ | |
2232 | consumer = session->ust_session->consumer; | |
2233 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2234 | break; |
2235 | default: | |
f73fabfd | 2236 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2237 | goto error; |
2238 | } | |
2239 | ||
2f77fc4b | 2240 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2241 | strncat(consumer->subdir, dir_name, |
2242 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2243 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2244 | ||
f73fabfd | 2245 | ret = LTTNG_OK; |
54d01ffb DG |
2246 | |
2247 | error: | |
2248 | return ret; | |
2249 | } | |
2250 | ||
00e2e675 | 2251 | /* |
2f77fc4b | 2252 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2253 | * |
2254 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2255 | */ |
2f77fc4b DG |
2256 | static int create_ust_session(struct ltt_session *session, |
2257 | struct lttng_domain *domain) | |
00e2e675 DG |
2258 | { |
2259 | int ret; | |
2f77fc4b | 2260 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2261 | |
a4b92340 | 2262 | assert(session); |
2f77fc4b DG |
2263 | assert(domain); |
2264 | assert(session->consumer); | |
a4b92340 | 2265 | |
2f77fc4b DG |
2266 | switch (domain->type) { |
2267 | case LTTNG_DOMAIN_UST: | |
2268 | break; | |
2269 | default: | |
2270 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2271 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2272 | goto error; |
2273 | } | |
2274 | ||
2f77fc4b DG |
2275 | DBG("Creating UST session"); |
2276 | ||
dec56f6c | 2277 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2278 | if (lus == NULL) { |
f73fabfd | 2279 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2280 | goto error; |
2281 | } | |
2282 | ||
2f77fc4b DG |
2283 | lus->uid = session->uid; |
2284 | lus->gid = session->gid; | |
2285 | session->ust_session = lus; | |
00e2e675 | 2286 | |
2f77fc4b DG |
2287 | /* Copy session output to the newly created UST session */ |
2288 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2289 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2290 | goto error; |
2291 | } | |
2292 | ||
f73fabfd | 2293 | return LTTNG_OK; |
00e2e675 DG |
2294 | |
2295 | error: | |
2f77fc4b DG |
2296 | free(lus); |
2297 | session->ust_session = NULL; | |
00e2e675 DG |
2298 | return ret; |
2299 | } | |
2300 | ||
2301 | /* | |
2f77fc4b | 2302 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2303 | */ |
2f77fc4b | 2304 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2305 | { |
2306 | int ret; | |
a4b92340 | 2307 | |
2f77fc4b | 2308 | DBG("Creating kernel session"); |
00e2e675 | 2309 | |
2f77fc4b DG |
2310 | ret = kernel_create_session(session, kernel_tracer_fd); |
2311 | if (ret < 0) { | |
f73fabfd | 2312 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2313 | goto error; |
2314 | } | |
2315 | ||
2f77fc4b DG |
2316 | /* Code flow safety */ |
2317 | assert(session->kernel_session); | |
2318 | ||
2319 | /* Copy session output to the newly created Kernel session */ | |
2320 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2321 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2322 | goto error; |
2323 | } | |
2324 | ||
2f77fc4b DG |
2325 | /* Create directory(ies) on local filesystem. */ |
2326 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2327 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2328 | ret = run_as_mkdir_recursive( | |
2329 | session->kernel_session->consumer->dst.trace_path, | |
2330 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2331 | if (ret < 0) { | |
2332 | if (ret != -EEXIST) { | |
2333 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2334 | goto error; |
2335 | } | |
00e2e675 | 2336 | } |
2f77fc4b | 2337 | } |
00e2e675 | 2338 | |
2f77fc4b DG |
2339 | session->kernel_session->uid = session->uid; |
2340 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2341 | |
f73fabfd | 2342 | return LTTNG_OK; |
00e2e675 | 2343 | |
2f77fc4b DG |
2344 | error: |
2345 | trace_kernel_destroy_session(session->kernel_session); | |
2346 | session->kernel_session = NULL; | |
2347 | return ret; | |
2348 | } | |
00e2e675 | 2349 | |
2f77fc4b DG |
2350 | /* |
2351 | * Count number of session permitted by uid/gid. | |
2352 | */ | |
2353 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2354 | { | |
2355 | unsigned int i = 0; | |
2356 | struct ltt_session *session; | |
07424f16 | 2357 | |
2f77fc4b DG |
2358 | DBG("Counting number of available session for UID %d GID %d", |
2359 | uid, gid); | |
2360 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2361 | /* |
2f77fc4b | 2362 | * Only list the sessions the user can control. |
00e2e675 | 2363 | */ |
2f77fc4b DG |
2364 | if (!session_access_ok(session, uid, gid)) { |
2365 | continue; | |
2366 | } | |
2367 | i++; | |
a4b92340 | 2368 | } |
2f77fc4b | 2369 | return i; |
00e2e675 DG |
2370 | } |
2371 | ||
54d01ffb DG |
2372 | /* |
2373 | * Process the command requested by the lttng client within the command | |
2374 | * context structure. This function make sure that the return structure (llm) | |
2375 | * is set and ready for transmission before returning. | |
2376 | * | |
2377 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2378 | * |
2379 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2380 | * |
2381 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2382 | */ |
53a80697 MD |
2383 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2384 | int *sock_error) | |
54d01ffb | 2385 | { |
f73fabfd | 2386 | int ret = LTTNG_OK; |
44d3bd01 | 2387 | int need_tracing_session = 1; |
2e09ba09 | 2388 | int need_domain; |
54d01ffb DG |
2389 | |
2390 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2391 | ||
53a80697 MD |
2392 | *sock_error = 0; |
2393 | ||
2e09ba09 MD |
2394 | switch (cmd_ctx->lsm->cmd_type) { |
2395 | case LTTNG_CREATE_SESSION: | |
2396 | case LTTNG_DESTROY_SESSION: | |
2397 | case LTTNG_LIST_SESSIONS: | |
2398 | case LTTNG_LIST_DOMAINS: | |
2399 | case LTTNG_START_TRACE: | |
2400 | case LTTNG_STOP_TRACE: | |
6d805429 | 2401 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2402 | need_domain = 0; |
3aace903 | 2403 | break; |
2e09ba09 MD |
2404 | default: |
2405 | need_domain = 1; | |
2406 | } | |
2407 | ||
2408 | if (opt_no_kernel && need_domain | |
2409 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2410 | if (!is_root) { |
f73fabfd | 2411 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2412 | } else { |
f73fabfd | 2413 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2414 | } |
4fba7219 DG |
2415 | goto error; |
2416 | } | |
2417 | ||
8d3113b2 DG |
2418 | /* Deny register consumer if we already have a spawned consumer. */ |
2419 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2420 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2421 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2422 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2423 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2424 | goto error; |
2425 | } | |
2426 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2427 | } | |
2428 | ||
54d01ffb DG |
2429 | /* |
2430 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2431 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2432 | * command. |
2433 | */ | |
2434 | switch(cmd_ctx->lsm->cmd_type) { | |
2435 | case LTTNG_LIST_SESSIONS: | |
2436 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2437 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2438 | case LTTNG_LIST_DOMAINS: |
2439 | case LTTNG_LIST_CHANNELS: | |
2440 | case LTTNG_LIST_EVENTS: | |
2441 | break; | |
2442 | default: | |
2443 | /* Setup lttng message with no payload */ | |
2444 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2445 | if (ret < 0) { | |
2446 | /* This label does not try to unlock the session */ | |
2447 | goto init_setup_error; | |
2448 | } | |
2449 | } | |
2450 | ||
2451 | /* Commands that DO NOT need a session. */ | |
2452 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2453 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2454 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2455 | case LTTNG_LIST_SESSIONS: |
2456 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2457 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2458 | need_tracing_session = 0; |
54d01ffb DG |
2459 | break; |
2460 | default: | |
2461 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2462 | /* |
2463 | * We keep the session list lock across _all_ commands | |
2464 | * for now, because the per-session lock does not | |
2465 | * handle teardown properly. | |
2466 | */ | |
74babd95 | 2467 | session_lock_list(); |
54d01ffb DG |
2468 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2469 | if (cmd_ctx->session == NULL) { | |
2470 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2471 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2472 | } else { |
2473 | /* If no session name specified */ | |
f73fabfd | 2474 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2475 | } |
2476 | goto error; | |
2477 | } else { | |
2478 | /* Acquire lock for the session */ | |
2479 | session_lock(cmd_ctx->session); | |
2480 | } | |
2481 | break; | |
2482 | } | |
b389abbe | 2483 | |
2e09ba09 MD |
2484 | if (!need_domain) { |
2485 | goto skip_domain; | |
2486 | } | |
a4b92340 | 2487 | |
54d01ffb DG |
2488 | /* |
2489 | * Check domain type for specific "pre-action". | |
2490 | */ | |
2491 | switch (cmd_ctx->lsm->domain.type) { | |
2492 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2493 | if (!is_root) { |
f73fabfd | 2494 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2495 | goto error; |
2496 | } | |
2497 | ||
54d01ffb | 2498 | /* Kernel tracer check */ |
a4b35e07 | 2499 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2500 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2501 | ret = init_kernel_tracer(); |
2502 | if (ret != 0) { | |
54d01ffb DG |
2503 | goto error; |
2504 | } | |
2505 | } | |
5eb91c98 | 2506 | |
5c827ce0 DG |
2507 | /* Consumer is in an ERROR state. Report back to client */ |
2508 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2509 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2510 | goto error; |
2511 | } | |
2512 | ||
54d01ffb | 2513 | /* Need a session for kernel command */ |
44d3bd01 | 2514 | if (need_tracing_session) { |
54d01ffb | 2515 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2516 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2517 | if (ret < 0) { |
f73fabfd | 2518 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2519 | goto error; |
2520 | } | |
b389abbe | 2521 | } |
7d29a247 | 2522 | |
54d01ffb | 2523 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2524 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2525 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2526 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2527 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2528 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2529 | if (ret < 0) { |
f73fabfd | 2530 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2531 | goto error; |
950131af | 2532 | } |
5c827ce0 | 2533 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2534 | } else { |
2535 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2536 | } |
173af62f | 2537 | |
a4b92340 DG |
2538 | /* |
2539 | * The consumer was just spawned so we need to add the socket to | |
2540 | * the consumer output of the session if exist. | |
2541 | */ | |
2542 | ret = consumer_create_socket(&kconsumer_data, | |
2543 | cmd_ctx->session->kernel_session->consumer); | |
2544 | if (ret < 0) { | |
2545 | goto error; | |
173af62f | 2546 | } |
0d0c377a | 2547 | } |
5c827ce0 | 2548 | |
54d01ffb | 2549 | break; |
2bdd86d4 | 2550 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2551 | { |
5c827ce0 DG |
2552 | /* Consumer is in an ERROR state. Report back to client */ |
2553 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2554 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2555 | goto error; |
2556 | } | |
2557 | ||
44d3bd01 | 2558 | if (need_tracing_session) { |
a4b92340 | 2559 | /* Create UST session if none exist. */ |
f6a9efaa | 2560 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2561 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2562 | &cmd_ctx->lsm->domain); |
f73fabfd | 2563 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2564 | goto error; |
2565 | } | |
2566 | } | |
00e2e675 | 2567 | |
7753dea8 MD |
2568 | /* Start the UST consumer daemons */ |
2569 | /* 64-bit */ | |
2570 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2571 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2572 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2573 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2574 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2575 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2576 | if (ret < 0) { |
f73fabfd | 2577 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2578 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2579 | goto error; |
2580 | } | |
48842b30 | 2581 | |
173af62f | 2582 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2583 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2584 | } else { |
7753dea8 MD |
2585 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2586 | } | |
173af62f DG |
2587 | |
2588 | /* | |
2589 | * Setup socket for consumer 64 bit. No need for atomic access | |
2590 | * since it was set above and can ONLY be set in this thread. | |
2591 | */ | |
a4b92340 DG |
2592 | ret = consumer_create_socket(&ustconsumer64_data, |
2593 | cmd_ctx->session->ust_session->consumer); | |
2594 | if (ret < 0) { | |
2595 | goto error; | |
173af62f DG |
2596 | } |
2597 | ||
7753dea8 | 2598 | /* 32-bit */ |
fc7a59ce | 2599 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2600 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2601 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2602 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2603 | ret = start_consumerd(&ustconsumer32_data); | |
2604 | if (ret < 0) { | |
f73fabfd | 2605 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2606 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2607 | goto error; |
2608 | } | |
5c827ce0 | 2609 | |
173af62f | 2610 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2611 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2612 | } else { |
2613 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2614 | } |
173af62f DG |
2615 | |
2616 | /* | |
2617 | * Setup socket for consumer 64 bit. No need for atomic access | |
2618 | * since it was set above and can ONLY be set in this thread. | |
2619 | */ | |
a4b92340 DG |
2620 | ret = consumer_create_socket(&ustconsumer32_data, |
2621 | cmd_ctx->session->ust_session->consumer); | |
2622 | if (ret < 0) { | |
2623 | goto error; | |
173af62f | 2624 | } |
44d3bd01 DG |
2625 | } |
2626 | break; | |
48842b30 | 2627 | } |
54d01ffb | 2628 | default: |
54d01ffb DG |
2629 | break; |
2630 | } | |
2e09ba09 | 2631 | skip_domain: |
33a2b854 | 2632 | |
5c827ce0 DG |
2633 | /* Validate consumer daemon state when start/stop trace command */ |
2634 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2635 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2636 | switch (cmd_ctx->lsm->domain.type) { | |
2637 | case LTTNG_DOMAIN_UST: | |
2638 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2639 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2640 | goto error; |
2641 | } | |
2642 | break; | |
2643 | case LTTNG_DOMAIN_KERNEL: | |
2644 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2645 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2646 | goto error; |
2647 | } | |
2648 | break; | |
2649 | } | |
2650 | } | |
2651 | ||
8e0af1b4 MD |
2652 | /* |
2653 | * Check that the UID or GID match that of the tracing session. | |
2654 | * The root user can interact with all sessions. | |
2655 | */ | |
2656 | if (need_tracing_session) { | |
2657 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2658 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2659 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2660 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2661 | goto error; |
2662 | } | |
2663 | } | |
2664 | ||
ffe60014 DG |
2665 | /* |
2666 | * Send relayd information to consumer as soon as we have a domain and a | |
2667 | * session defined. | |
2668 | */ | |
2669 | if (cmd_ctx->session && need_domain) { | |
2670 | /* | |
2671 | * Setup relayd if not done yet. If the relayd information was already | |
2672 | * sent to the consumer, this call will gracefully return. | |
2673 | */ | |
2674 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2675 | if (ret != LTTNG_OK) { | |
2676 | goto error; | |
2677 | } | |
2678 | } | |
2679 | ||
54d01ffb DG |
2680 | /* Process by command type */ |
2681 | switch (cmd_ctx->lsm->cmd_type) { | |
2682 | case LTTNG_ADD_CONTEXT: | |
2683 | { | |
2684 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2685 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2686 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2687 | break; |
2688 | } | |
2689 | case LTTNG_DISABLE_CHANNEL: | |
2690 | { | |
2691 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2692 | cmd_ctx->lsm->u.disable.channel_name); | |
2693 | break; | |
2694 | } | |
2695 | case LTTNG_DISABLE_EVENT: | |
2696 | { | |
2697 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2698 | cmd_ctx->lsm->u.disable.channel_name, | |
2699 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2700 | break; |
2701 | } | |
54d01ffb DG |
2702 | case LTTNG_DISABLE_ALL_EVENT: |
2703 | { | |
2bdd86d4 | 2704 | DBG("Disabling all events"); |
54d01ffb DG |
2705 | |
2706 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2707 | cmd_ctx->lsm->u.disable.channel_name); | |
2708 | break; | |
2709 | } | |
2710 | case LTTNG_ENABLE_CHANNEL: | |
2711 | { | |
7972aab2 | 2712 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2713 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2714 | break; |
2715 | } | |
2716 | case LTTNG_ENABLE_EVENT: | |
2717 | { | |
7972aab2 | 2718 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
54d01ffb | 2719 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2720 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2721 | break; |
2722 | } | |
2723 | case LTTNG_ENABLE_ALL_EVENT: | |
2724 | { | |
2bdd86d4 | 2725 | DBG("Enabling all events"); |
54d01ffb | 2726 | |
7972aab2 | 2727 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 2728 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2729 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2730 | break; |
2731 | } | |
052da939 | 2732 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2733 | { |
9f19cc17 | 2734 | struct lttng_event *events; |
54d01ffb | 2735 | ssize_t nb_events; |
052da939 | 2736 | |
54d01ffb DG |
2737 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2738 | if (nb_events < 0) { | |
f73fabfd | 2739 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2740 | ret = -nb_events; |
2741 | goto error; | |
2ef84c95 DG |
2742 | } |
2743 | ||
2744 | /* | |
2745 | * Setup lttng message with payload size set to the event list size in | |
2746 | * bytes and then copy list into the llm payload. | |
2747 | */ | |
052da939 | 2748 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2749 | if (ret < 0) { |
052da939 | 2750 | free(events); |
2ef84c95 DG |
2751 | goto setup_error; |
2752 | } | |
2753 | ||
2754 | /* Copy event list into message payload */ | |
9f19cc17 | 2755 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2756 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2757 | |
9f19cc17 | 2758 | free(events); |
2ef84c95 | 2759 | |
f73fabfd | 2760 | ret = LTTNG_OK; |
2ef84c95 DG |
2761 | break; |
2762 | } | |
f37d259d MD |
2763 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2764 | { | |
2765 | struct lttng_event_field *fields; | |
2766 | ssize_t nb_fields; | |
2767 | ||
a4b92340 DG |
2768 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2769 | &fields); | |
f37d259d | 2770 | if (nb_fields < 0) { |
f73fabfd | 2771 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2772 | ret = -nb_fields; |
2773 | goto error; | |
2774 | } | |
2775 | ||
2776 | /* | |
2777 | * Setup lttng message with payload size set to the event list size in | |
2778 | * bytes and then copy list into the llm payload. | |
2779 | */ | |
a4b92340 DG |
2780 | ret = setup_lttng_msg(cmd_ctx, |
2781 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2782 | if (ret < 0) { |
2783 | free(fields); | |
2784 | goto setup_error; | |
2785 | } | |
2786 | ||
2787 | /* Copy event list into message payload */ | |
2788 | memcpy(cmd_ctx->llm->payload, fields, | |
2789 | sizeof(struct lttng_event_field) * nb_fields); | |
2790 | ||
2791 | free(fields); | |
2792 | ||
f73fabfd | 2793 | ret = LTTNG_OK; |
f37d259d MD |
2794 | break; |
2795 | } | |
00e2e675 DG |
2796 | case LTTNG_SET_CONSUMER_URI: |
2797 | { | |
a4b92340 DG |
2798 | size_t nb_uri, len; |
2799 | struct lttng_uri *uris; | |
2800 | ||
2801 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2802 | len = nb_uri * sizeof(struct lttng_uri); | |
2803 | ||
2804 | if (nb_uri == 0) { | |
f73fabfd | 2805 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2806 | goto error; |
2807 | } | |
2808 | ||
2809 | uris = zmalloc(len); | |
2810 | if (uris == NULL) { | |
f73fabfd | 2811 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2812 | goto error; |
2813 | } | |
2814 | ||
2815 | /* Receive variable len data */ | |
77c7c900 | 2816 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2817 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2818 | if (ret <= 0) { | |
2819 | DBG("No URIs received from client... continuing"); | |
2820 | *sock_error = 1; | |
f73fabfd | 2821 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2822 | free(uris); |
a4b92340 DG |
2823 | goto error; |
2824 | } | |
2825 | ||
00e2e675 | 2826 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2827 | nb_uri, uris); |
f73fabfd | 2828 | if (ret != LTTNG_OK) { |
b1d41407 | 2829 | free(uris); |
a4b92340 DG |
2830 | goto error; |
2831 | } | |
2832 | ||
2833 | /* | |
2834 | * XXX: 0 means that this URI should be applied on the session. Should | |
2835 | * be a DOMAIN enuam. | |
2836 | */ | |
2837 | if (cmd_ctx->lsm->domain.type == 0) { | |
2838 | /* Add the URI for the UST session if a consumer is present. */ | |
2839 | if (cmd_ctx->session->ust_session && | |
2840 | cmd_ctx->session->ust_session->consumer) { | |
2841 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2842 | nb_uri, uris); | |
2843 | } else if (cmd_ctx->session->kernel_session && | |
2844 | cmd_ctx->session->kernel_session->consumer) { | |
2845 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2846 | cmd_ctx->session, nb_uri, uris); | |
2847 | } | |
2848 | } | |
2849 | ||
b1d41407 DG |
2850 | free(uris); |
2851 | ||
00e2e675 DG |
2852 | break; |
2853 | } | |
f3ed775e | 2854 | case LTTNG_START_TRACE: |
8c0faa1d | 2855 | { |
54d01ffb | 2856 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2857 | break; |
2858 | } | |
f3ed775e | 2859 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2860 | { |
54d01ffb | 2861 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2862 | break; |
2863 | } | |
5e16da05 MD |
2864 | case LTTNG_CREATE_SESSION: |
2865 | { | |
a4b92340 DG |
2866 | size_t nb_uri, len; |
2867 | struct lttng_uri *uris = NULL; | |
2868 | ||
2869 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2870 | len = nb_uri * sizeof(struct lttng_uri); | |
2871 | ||
2872 | if (nb_uri > 0) { | |
2873 | uris = zmalloc(len); | |
2874 | if (uris == NULL) { | |
f73fabfd | 2875 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2876 | goto error; |
2877 | } | |
2878 | ||
2879 | /* Receive variable len data */ | |
77c7c900 | 2880 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2881 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2882 | if (ret <= 0) { | |
2883 | DBG("No URIs received from client... continuing"); | |
2884 | *sock_error = 1; | |
f73fabfd | 2885 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2886 | free(uris); |
a4b92340 DG |
2887 | goto error; |
2888 | } | |
2889 | ||
2890 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2891 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2892 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2893 | free(uris); |
a4b92340 DG |
2894 | goto error; |
2895 | } | |
2896 | } | |
2897 | ||
2898 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2899 | &cmd_ctx->creds); | |
2900 | ||
b1d41407 DG |
2901 | free(uris); |
2902 | ||
00e2e675 DG |
2903 | break; |
2904 | } | |
5e16da05 MD |
2905 | case LTTNG_DESTROY_SESSION: |
2906 | { | |
2f77fc4b | 2907 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2908 | |
2909 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2910 | cmd_ctx->session = NULL; |
5461b305 | 2911 | break; |
5e16da05 | 2912 | } |
9f19cc17 | 2913 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2914 | { |
54d01ffb DG |
2915 | ssize_t nb_dom; |
2916 | struct lttng_domain *domains; | |
5461b305 | 2917 | |
54d01ffb DG |
2918 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2919 | if (nb_dom < 0) { | |
f73fabfd | 2920 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2921 | ret = -nb_dom; |
2922 | goto error; | |
ce3d728c | 2923 | } |
520ff687 | 2924 | |
54d01ffb | 2925 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 2926 | if (ret < 0) { |
ae9c20bc | 2927 | free(domains); |
5461b305 | 2928 | goto setup_error; |
520ff687 | 2929 | } |
57167058 | 2930 | |
54d01ffb DG |
2931 | /* Copy event list into message payload */ |
2932 | memcpy(cmd_ctx->llm->payload, domains, | |
2933 | nb_dom * sizeof(struct lttng_domain)); | |
2934 | ||
2935 | free(domains); | |
5e16da05 | 2936 | |
f73fabfd | 2937 | ret = LTTNG_OK; |
5e16da05 MD |
2938 | break; |
2939 | } | |
9f19cc17 | 2940 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2941 | { |
6775595e | 2942 | int nb_chan; |
54d01ffb DG |
2943 | struct lttng_channel *channels; |
2944 | ||
b551a063 DG |
2945 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2946 | cmd_ctx->session, &channels); | |
54d01ffb | 2947 | if (nb_chan < 0) { |
f73fabfd | 2948 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2949 | ret = -nb_chan; |
2950 | goto error; | |
5461b305 | 2951 | } |
ca95a216 | 2952 | |
54d01ffb | 2953 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 2954 | if (ret < 0) { |
ae9c20bc | 2955 | free(channels); |
5461b305 DG |
2956 | goto setup_error; |
2957 | } | |
9f19cc17 | 2958 | |
54d01ffb DG |
2959 | /* Copy event list into message payload */ |
2960 | memcpy(cmd_ctx->llm->payload, channels, | |
2961 | nb_chan * sizeof(struct lttng_channel)); | |
2962 | ||
2963 | free(channels); | |
9f19cc17 | 2964 | |
f73fabfd | 2965 | ret = LTTNG_OK; |
5461b305 | 2966 | break; |
5e16da05 | 2967 | } |
9f19cc17 | 2968 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2969 | { |
b551a063 | 2970 | ssize_t nb_event; |
684d34d2 | 2971 | struct lttng_event *events = NULL; |
9f19cc17 | 2972 | |
b551a063 | 2973 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2974 | cmd_ctx->lsm->u.list.channel_name, &events); |
2975 | if (nb_event < 0) { | |
f73fabfd | 2976 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2977 | ret = -nb_event; |
2978 | goto error; | |
5461b305 | 2979 | } |
ca95a216 | 2980 | |
54d01ffb | 2981 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 2982 | if (ret < 0) { |
ae9c20bc | 2983 | free(events); |
5461b305 DG |
2984 | goto setup_error; |
2985 | } | |
9f19cc17 | 2986 | |
54d01ffb DG |
2987 | /* Copy event list into message payload */ |
2988 | memcpy(cmd_ctx->llm->payload, events, | |
2989 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2990 | |
54d01ffb | 2991 | free(events); |
9f19cc17 | 2992 | |
f73fabfd | 2993 | ret = LTTNG_OK; |
5461b305 | 2994 | break; |
5e16da05 MD |
2995 | } |
2996 | case LTTNG_LIST_SESSIONS: | |
2997 | { | |
8e0af1b4 | 2998 | unsigned int nr_sessions; |
5461b305 | 2999 | |
8e0af1b4 | 3000 | session_lock_list(); |
730389d9 DG |
3001 | nr_sessions = lttng_sessions_count( |
3002 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3003 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3004 | |
8e0af1b4 | 3005 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3006 | if (ret < 0) { |
54d01ffb | 3007 | session_unlock_list(); |
5461b305 | 3008 | goto setup_error; |
e065084a | 3009 | } |
5e16da05 | 3010 | |
6c9cc2ab | 3011 | /* Filled the session array */ |
2f77fc4b | 3012 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3013 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3014 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3015 | |
54d01ffb | 3016 | session_unlock_list(); |
5e16da05 | 3017 | |
f73fabfd | 3018 | ret = LTTNG_OK; |
5e16da05 MD |
3019 | break; |
3020 | } | |
d0254c7c MD |
3021 | case LTTNG_CALIBRATE: |
3022 | { | |
54d01ffb DG |
3023 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3024 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3025 | break; |
3026 | } | |
d9800920 DG |
3027 | case LTTNG_REGISTER_CONSUMER: |
3028 | { | |
2f77fc4b DG |
3029 | struct consumer_data *cdata; |
3030 | ||
3031 | switch (cmd_ctx->lsm->domain.type) { | |
3032 | case LTTNG_DOMAIN_KERNEL: | |
3033 | cdata = &kconsumer_data; | |
3034 | break; | |
3035 | default: | |
f73fabfd | 3036 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3037 | goto error; |
3038 | } | |
3039 | ||
54d01ffb | 3040 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3041 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3042 | break; |
3043 | } | |
025faf73 | 3044 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
3045 | { |
3046 | struct lttng_filter_bytecode *bytecode; | |
3047 | ||
025faf73 | 3048 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 3049 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3050 | goto error; |
3051 | } | |
52df2401 MD |
3052 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
3053 | ret = LTTNG_ERR_FILTER_INVAL; | |
3054 | goto error; | |
3055 | } | |
025faf73 | 3056 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 3057 | if (!bytecode) { |
f73fabfd | 3058 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
3059 | goto error; |
3060 | } | |
3061 | /* Receive var. len. data */ | |
3062 | DBG("Receiving var len data from client ..."); | |
3063 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 3064 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
3065 | if (ret <= 0) { |
3066 | DBG("Nothing recv() from client var len data... continuing"); | |
3067 | *sock_error = 1; | |
f73fabfd | 3068 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3069 | goto error; |
3070 | } | |
3071 | ||
3072 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 3073 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 3074 | free(bytecode); |
f73fabfd | 3075 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3076 | goto error; |
3077 | } | |
3078 | ||
7972aab2 | 3079 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
025faf73 DG |
3080 | cmd_ctx->lsm->u.enable.channel_name, |
3081 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
3082 | break; |
3083 | } | |
6d805429 | 3084 | case LTTNG_DATA_PENDING: |
806e2684 | 3085 | { |
6d805429 | 3086 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3087 | break; |
3088 | } | |
5e16da05 | 3089 | default: |
f73fabfd | 3090 | ret = LTTNG_ERR_UND; |
5461b305 | 3091 | break; |
fac6795d DG |
3092 | } |
3093 | ||
5461b305 | 3094 | error: |
5461b305 DG |
3095 | if (cmd_ctx->llm == NULL) { |
3096 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3097 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3098 | goto setup_error; |
3099 | } | |
3100 | } | |
54d01ffb | 3101 | /* Set return code */ |
5461b305 | 3102 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3103 | setup_error: |
b5541356 | 3104 | if (cmd_ctx->session) { |
54d01ffb | 3105 | session_unlock(cmd_ctx->session); |
b5541356 | 3106 | } |
256a5576 MD |
3107 | if (need_tracing_session) { |
3108 | session_unlock_list(); | |
3109 | } | |
54d01ffb | 3110 | init_setup_error: |
8028d920 | 3111 | return ret; |
fac6795d DG |
3112 | } |
3113 | ||
44a5e5eb DG |
3114 | /* |
3115 | * Thread managing health check socket. | |
3116 | */ | |
3117 | static void *thread_manage_health(void *data) | |
3118 | { | |
eb4a2943 | 3119 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3120 | uint32_t revents, nb_fd; |
3121 | struct lttng_poll_event events; | |
3122 | struct lttcomm_health_msg msg; | |
3123 | struct lttcomm_health_data reply; | |
3124 | ||
3125 | DBG("[thread] Manage health check started"); | |
3126 | ||
3127 | rcu_register_thread(); | |
3128 | ||
6d737ce4 DG |
3129 | /* We might hit an error path before this is created. */ |
3130 | lttng_poll_init(&events); | |
3cc04881 | 3131 | |
44a5e5eb DG |
3132 | /* Create unix socket */ |
3133 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3134 | if (sock < 0) { | |
3135 | ERR("Unable to create health check Unix socket"); | |
3136 | ret = -1; | |
3137 | goto error; | |
3138 | } | |
3139 | ||
b662582b DG |
3140 | /* |
3141 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3142 | * show must go on. | |
3143 | */ | |
3144 | (void) utils_set_fd_cloexec(sock); | |
3145 | ||
44a5e5eb DG |
3146 | ret = lttcomm_listen_unix_sock(sock); |
3147 | if (ret < 0) { | |
3148 | goto error; | |
3149 | } | |
3150 | ||
3151 | /* | |
3152 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3153 | * more will be added to this poll set. | |
3154 | */ | |
d0b96690 | 3155 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3156 | if (ret < 0) { |
3157 | goto error; | |
3158 | } | |
3159 | ||
3160 | /* Add the application registration socket */ | |
3161 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3162 | if (ret < 0) { | |
3163 | goto error; | |
3164 | } | |
3165 | ||
3166 | while (1) { | |
3167 | DBG("Health check ready"); | |
3168 | ||
44a5e5eb DG |
3169 | /* Inifinite blocking call, waiting for transmission */ |
3170 | restart: | |
3171 | ret = lttng_poll_wait(&events, -1); | |
3172 | if (ret < 0) { | |
3173 | /* | |
3174 | * Restart interrupted system call. | |
3175 | */ | |
3176 | if (errno == EINTR) { | |
3177 | goto restart; | |
3178 | } | |
3179 | goto error; | |
3180 | } | |
3181 | ||
0d9c5d77 DG |
3182 | nb_fd = ret; |
3183 | ||
44a5e5eb DG |
3184 | for (i = 0; i < nb_fd; i++) { |
3185 | /* Fetch once the poll data */ | |
3186 | revents = LTTNG_POLL_GETEV(&events, i); | |
3187 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3188 | ||
3189 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3190 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3191 | if (ret) { |
139ac872 MD |
3192 | err = 0; |
3193 | goto exit; | |
44a5e5eb DG |
3194 | } |
3195 | ||
3196 | /* Event on the registration socket */ | |
3197 | if (pollfd == sock) { | |
3198 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3199 | ERR("Health socket poll error"); | |
3200 | goto error; | |
3201 | } | |
3202 | } | |
3203 | } | |
3204 | ||
3205 | new_sock = lttcomm_accept_unix_sock(sock); | |
3206 | if (new_sock < 0) { | |
3207 | goto error; | |
3208 | } | |
3209 | ||
b662582b DG |
3210 | /* |
3211 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3212 | * show must go on. | |
3213 | */ | |
3214 | (void) utils_set_fd_cloexec(new_sock); | |
3215 | ||
44a5e5eb DG |
3216 | DBG("Receiving data from client for health..."); |
3217 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3218 | if (ret <= 0) { | |
3219 | DBG("Nothing recv() from client... continuing"); | |
3220 | ret = close(new_sock); | |
3221 | if (ret) { | |
3222 | PERROR("close"); | |
3223 | } | |
3224 | new_sock = -1; | |
3225 | continue; | |
3226 | } | |
3227 | ||
3228 | rcu_thread_online(); | |
3229 | ||
3230 | switch (msg.component) { | |
3231 | case LTTNG_HEALTH_CMD: | |
927ca06a | 3232 | reply.ret_code = health_check_state(HEALTH_TYPE_CMD); |
44a5e5eb | 3233 | break; |
139ac872 | 3234 | case LTTNG_HEALTH_APP_MANAGE: |
927ca06a | 3235 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE); |
139ac872 | 3236 | break; |
44a5e5eb | 3237 | case LTTNG_HEALTH_APP_REG: |
927ca06a | 3238 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG); |
44a5e5eb DG |
3239 | break; |
3240 | case LTTNG_HEALTH_KERNEL: | |
927ca06a | 3241 | reply.ret_code = health_check_state(HEALTH_TYPE_KERNEL); |
44a5e5eb DG |
3242 | break; |
3243 | case LTTNG_HEALTH_CONSUMER: | |
3244 | reply.ret_code = check_consumer_health(); | |
3245 | break; | |
0b2dc8df MD |
3246 | case LTTNG_HEALTH_HT_CLEANUP: |
3247 | reply.ret_code = health_check_state(HEALTH_TYPE_HT_CLEANUP); | |
3248 | break; | |
380e8d6f MD |
3249 | case LTTNG_HEALTH_APP_MANAGE_NOTIFY: |
3250 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE_NOTIFY); | |
3251 | break; | |
12e2b881 MD |
3252 | case LTTNG_HEALTH_APP_REG_DISPATCH: |
3253 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG_DISPATCH); | |
3254 | break; | |
44a5e5eb | 3255 | case LTTNG_HEALTH_ALL: |
44a5e5eb | 3256 | reply.ret_code = |
927ca06a DG |
3257 | health_check_state(HEALTH_TYPE_APP_MANAGE) && |
3258 | health_check_state(HEALTH_TYPE_APP_REG) && | |
3259 | health_check_state(HEALTH_TYPE_CMD) && | |
3260 | health_check_state(HEALTH_TYPE_KERNEL) && | |
0b2dc8df | 3261 | check_consumer_health() && |
380e8d6f | 3262 | health_check_state(HEALTH_TYPE_HT_CLEANUP) && |
12e2b881 MD |
3263 | health_check_state(HEALTH_TYPE_APP_MANAGE_NOTIFY) && |
3264 | health_check_state(HEALTH_TYPE_APP_REG_DISPATCH); | |
44a5e5eb DG |
3265 | break; |
3266 | default: | |
f73fabfd | 3267 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3268 | break; |
3269 | } | |
3270 | ||
3271 | /* | |
3272 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3273 | * the client where in the sessiond it is the opposite. Again, this is | |
3274 | * just to make things easier for us poor developer which enjoy a lot | |
3275 | * lazyness. | |
3276 | */ | |
3277 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3278 | reply.ret_code = !reply.ret_code; | |
3279 | } | |
3280 | ||
3281 | DBG2("Health check return value %d", reply.ret_code); | |
3282 | ||
3283 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3284 | if (ret < 0) { | |
3285 | ERR("Failed to send health data back to client"); | |
3286 | } | |
3287 | ||
3288 | /* End of transmission */ | |
3289 | ret = close(new_sock); | |
3290 | if (ret) { | |
3291 | PERROR("close"); | |
3292 | } | |
3293 | new_sock = -1; | |
3294 | } | |
3295 | ||
139ac872 | 3296 | exit: |
44a5e5eb | 3297 | error: |
139ac872 MD |
3298 | if (err) { |
3299 | ERR("Health error occurred in %s", __func__); | |
3300 | } | |
44a5e5eb DG |
3301 | DBG("Health check thread dying"); |
3302 | unlink(health_unix_sock_path); | |
3303 | if (sock >= 0) { | |
3304 | ret = close(sock); | |
3305 | if (ret) { | |
3306 | PERROR("close"); | |
3307 | } | |
3308 | } | |
44a5e5eb DG |
3309 | |
3310 | lttng_poll_clean(&events); | |
3311 | ||
3312 | rcu_unregister_thread(); | |
3313 | return NULL; | |
3314 | } | |
3315 | ||
1d4b027a | 3316 | /* |
d063d709 DG |
3317 | * This thread manage all clients request using the unix client socket for |
3318 | * communication. | |
1d4b027a DG |
3319 | */ |
3320 | static void *thread_manage_clients(void *data) | |
3321 | { | |
139ac872 | 3322 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3323 | int sock_error; |
5eb91c98 | 3324 | uint32_t revents, nb_fd; |
273ea72c | 3325 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3326 | struct lttng_poll_event events; |
1d4b027a DG |
3327 | |
3328 | DBG("[thread] Manage client started"); | |
3329 | ||
f6a9efaa DG |
3330 | rcu_register_thread(); |
3331 | ||
927ca06a DG |
3332 | health_register(HEALTH_TYPE_CMD); |
3333 | ||
6993eeb3 CB |
3334 | if (testpoint(thread_manage_clients)) { |
3335 | goto error_testpoint; | |
3336 | } | |
3337 | ||
840cb59c | 3338 | health_code_update(); |
44a5e5eb | 3339 | |
1d4b027a DG |
3340 | ret = lttcomm_listen_unix_sock(client_sock); |
3341 | if (ret < 0) { | |
35df2755 | 3342 | goto error_listen; |
1d4b027a DG |
3343 | } |
3344 | ||
5eb91c98 DG |
3345 | /* |
3346 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3347 | * more will be added to this poll set. | |
3348 | */ | |
d0b96690 | 3349 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3350 | if (ret < 0) { |
35df2755 | 3351 | goto error_create_poll; |
5eb91c98 | 3352 | } |
273ea72c | 3353 | |
5eb91c98 DG |
3354 | /* Add the application registration socket */ |
3355 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3356 | if (ret < 0) { | |
3357 | goto error; | |
3358 | } | |
273ea72c | 3359 | |
bbd973c2 DG |
3360 | /* |
3361 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3362 | */ |
3363 | if (opt_sig_parent) { | |
8db8d1dc | 3364 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3365 | } |
3366 | ||
6993eeb3 CB |
3367 | if (testpoint(thread_manage_clients_before_loop)) { |
3368 | goto error; | |
3369 | } | |
8ac94142 | 3370 | |
840cb59c | 3371 | health_code_update(); |
44a5e5eb | 3372 | |
1d4b027a | 3373 | while (1) { |
1d4b027a | 3374 | DBG("Accepting client command ..."); |
273ea72c DG |
3375 | |
3376 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3377 | restart: |
a78af745 | 3378 | health_poll_entry(); |
5eb91c98 | 3379 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3380 | health_poll_exit(); |
273ea72c | 3381 | if (ret < 0) { |
88f2b785 MD |
3382 | /* |
3383 | * Restart interrupted system call. | |
3384 | */ | |
3385 | if (errno == EINTR) { | |
3386 | goto restart; | |
3387 | } | |
273ea72c DG |
3388 | goto error; |
3389 | } | |
3390 | ||
0d9c5d77 DG |
3391 | nb_fd = ret; |
3392 | ||
5eb91c98 DG |
3393 | for (i = 0; i < nb_fd; i++) { |
3394 | /* Fetch once the poll data */ | |
3395 | revents = LTTNG_POLL_GETEV(&events, i); | |
3396 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3397 | ||
840cb59c | 3398 | health_code_update(); |
44a5e5eb | 3399 | |
5eb91c98 | 3400 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3401 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3402 | if (ret) { |
139ac872 MD |
3403 | err = 0; |
3404 | goto exit; | |
5eb91c98 DG |
3405 | } |
3406 | ||
3407 | /* Event on the registration socket */ | |
3408 | if (pollfd == client_sock) { | |
3409 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3410 | ERR("Client socket poll error"); | |
3411 | goto error; | |
3412 | } | |
3413 | } | |
3414 | } | |
3415 | ||
3416 | DBG("Wait for client response"); | |
3417 | ||
840cb59c | 3418 | health_code_update(); |
44a5e5eb | 3419 | |
5eb91c98 DG |
3420 | sock = lttcomm_accept_unix_sock(client_sock); |
3421 | if (sock < 0) { | |
273ea72c | 3422 | goto error; |
273ea72c DG |
3423 | } |
3424 | ||
b662582b DG |
3425 | /* |
3426 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3427 | * show must go on. | |
3428 | */ | |
3429 | (void) utils_set_fd_cloexec(sock); | |
3430 | ||
be040666 DG |
3431 | /* Set socket option for credentials retrieval */ |
3432 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3433 | if (ret < 0) { | |
3434 | goto error; | |
3435 | } | |
3436 | ||
5eb91c98 | 3437 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3438 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3439 | if (cmd_ctx == NULL) { |
76d7553f | 3440 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3441 | goto error; |
5eb91c98 | 3442 | } |
1d4b027a | 3443 | |
5eb91c98 | 3444 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3445 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3446 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3447 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3448 | goto error; |
3449 | } | |
1d4b027a | 3450 | |
5eb91c98 DG |
3451 | cmd_ctx->llm = NULL; |
3452 | cmd_ctx->session = NULL; | |
1d4b027a | 3453 | |
840cb59c | 3454 | health_code_update(); |
44a5e5eb | 3455 | |
5eb91c98 DG |
3456 | /* |
3457 | * Data is received from the lttng client. The struct | |
3458 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3459 | * the client. | |
3460 | */ | |
3461 | DBG("Receiving data from client ..."); | |
be040666 DG |
3462 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3463 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3464 | if (ret <= 0) { |
3465 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3466 | ret = close(sock); |
3467 | if (ret) { | |
3468 | PERROR("close"); | |
3469 | } | |
3470 | sock = -1; | |
a2c0da86 | 3471 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3472 | continue; |
3473 | } | |
1d4b027a | 3474 | |
840cb59c | 3475 | health_code_update(); |
44a5e5eb | 3476 | |
5eb91c98 DG |
3477 | // TODO: Validate cmd_ctx including sanity check for |
3478 | // security purpose. | |
f7776ea7 | 3479 | |
f6a9efaa | 3480 | rcu_thread_online(); |
5eb91c98 DG |
3481 | /* |
3482 | * This function dispatch the work to the kernel or userspace tracer | |
3483 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3484 | * informations for the client. The command context struct contains | |
3485 | * everything this function may needs. | |
3486 | */ | |
53a80697 | 3487 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3488 | rcu_thread_offline(); |
5eb91c98 | 3489 | if (ret < 0) { |
36134aa1 DG |
3490 | ret = close(sock); |
3491 | if (ret) { | |
3492 | PERROR("close"); | |
53a80697 | 3493 | } |
36134aa1 | 3494 | sock = -1; |
bbd973c2 | 3495 | /* |
5eb91c98 | 3496 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3497 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3498 | * (ENOMEM). Error detected but still accept |
3499 | * command, unless a socket error has been | |
3500 | * detected. | |
bbd973c2 | 3501 | */ |
bbd973c2 | 3502 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3503 | continue; |
3504 | } | |
d6e4fca4 | 3505 | |
840cb59c | 3506 | health_code_update(); |
44a5e5eb | 3507 | |
54d01ffb DG |
3508 | DBG("Sending response (size: %d, retcode: %s)", |
3509 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3510 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3511 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3512 | if (ret < 0) { |
3513 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3514 | } |
1d4b027a | 3515 | |
5eb91c98 | 3516 | /* End of transmission */ |
76d7553f MD |
3517 | ret = close(sock); |
3518 | if (ret) { | |
3519 | PERROR("close"); | |
3520 | } | |
3521 | sock = -1; | |
be040666 DG |
3522 | |
3523 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3524 | |
840cb59c | 3525 | health_code_update(); |
273ea72c DG |
3526 | } |
3527 | ||
139ac872 | 3528 | exit: |
5eb91c98 | 3529 | error: |
35df2755 CB |
3530 | if (sock >= 0) { |
3531 | ret = close(sock); | |
3532 | if (ret) { | |
3533 | PERROR("close"); | |
3534 | } | |
139ac872 | 3535 | } |
44a5e5eb | 3536 | |
35df2755 CB |
3537 | lttng_poll_clean(&events); |
3538 | clean_command_ctx(&cmd_ctx); | |
3539 | ||
3540 | error_listen: | |
3541 | error_create_poll: | |
6993eeb3 | 3542 | error_testpoint: |
273ea72c | 3543 | unlink(client_unix_sock_path); |
76d7553f MD |
3544 | if (client_sock >= 0) { |
3545 | ret = close(client_sock); | |
3546 | if (ret) { | |
3547 | PERROR("close"); | |
3548 | } | |
a4b35e07 | 3549 | } |
35df2755 CB |
3550 | |
3551 | if (err) { | |
840cb59c | 3552 | health_error(); |
35df2755 | 3553 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3554 | } |
273ea72c | 3555 | |
927ca06a | 3556 | health_unregister(); |
35df2755 CB |
3557 | |
3558 | DBG("Client thread dying"); | |
f6a9efaa DG |
3559 | |
3560 | rcu_unregister_thread(); | |
1d4b027a DG |
3561 | return NULL; |
3562 | } | |
3563 | ||
3564 | ||
fac6795d DG |
3565 | /* |
3566 | * usage function on stderr | |
3567 | */ | |
3568 | static void usage(void) | |
3569 | { | |
b716ce68 | 3570 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3571 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3572 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3573 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3574 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3575 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3576 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3577 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3578 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3579 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3580 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3581 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3582 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3583 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3584 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3585 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3586 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3587 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3588 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3589 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 3590 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 3591 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3592 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3593 | } |
3594 | ||
3595 | /* | |
3596 | * daemon argument parsing | |
3597 | */ | |
3598 | static int parse_args(int argc, char **argv) | |
3599 | { | |
3600 | int c; | |
3601 | ||
3602 | static struct option long_options[] = { | |
3603 | { "client-sock", 1, 0, 'c' }, | |
3604 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3605 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3606 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3607 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3608 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3609 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3610 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3611 | { "consumerd32-path", 1, 0, 'u' }, | |
3612 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3613 | { "consumerd64-path", 1, 0, 't' }, | |
3614 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3615 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3616 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3617 | { "help", 0, 0, 'h' }, |
3618 | { "group", 1, 0, 'g' }, | |
3619 | { "version", 0, 0, 'V' }, | |
75462a81 | 3620 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3621 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3622 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3623 | { "no-kernel", 0, 0, 'N' }, |
35f90c40 | 3624 | { "pidfile", 1, 0, 'p' }, |
fac6795d DG |
3625 | { NULL, 0, 0, 0 } |
3626 | }; | |
3627 | ||
3628 | while (1) { | |
3629 | int option_index = 0; | |
35f90c40 | 3630 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t:p:", |
54d01ffb | 3631 | long_options, &option_index); |
fac6795d DG |
3632 | if (c == -1) { |
3633 | break; | |
3634 | } | |
3635 | ||
3636 | switch (c) { | |
3637 | case 0: | |
3638 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3639 | if (optarg) { | |
3640 | fprintf(stderr, " with arg %s\n", optarg); | |
3641 | } | |
3642 | break; | |
b716ce68 | 3643 | case 'c': |
fac6795d DG |
3644 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3645 | break; | |
3646 | case 'a': | |
3647 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3648 | break; | |
3649 | case 'd': | |
3650 | opt_daemon = 1; | |
3651 | break; | |
3652 | case 'g': | |
fb09408a | 3653 | opt_tracing_group = optarg; |
fac6795d DG |
3654 | break; |
3655 | case 'h': | |
3656 | usage(); | |
3657 | exit(EXIT_FAILURE); | |
3658 | case 'V': | |
3659 | fprintf(stdout, "%s\n", VERSION); | |
3660 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3661 | case 'S': |
3662 | opt_sig_parent = 1; | |
3663 | break; | |
d6f42150 | 3664 | case 'E': |
3bd1e081 | 3665 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3666 | break; |
3667 | case 'C': | |
3bd1e081 MD |
3668 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3669 | break; | |
3670 | case 'F': | |
7753dea8 | 3671 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3672 | break; |
3673 | case 'D': | |
7753dea8 MD |
3674 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3675 | break; | |
3676 | case 'H': | |
3677 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3678 | break; | |
3679 | case 'G': | |
3680 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3681 | break; |
4fba7219 DG |
3682 | case 'N': |
3683 | opt_no_kernel = 1; | |
3684 | break; | |
75462a81 | 3685 | case 'q': |
97e19046 | 3686 | lttng_opt_quiet = 1; |
75462a81 | 3687 | break; |
3f9947db | 3688 | case 'v': |
53086306 | 3689 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3690 | lttng_opt_verbose += 1; |
3f9947db | 3691 | break; |
31f73cc9 | 3692 | case 'Z': |
3bd1e081 | 3693 | opt_verbose_consumer += 1; |
31f73cc9 | 3694 | break; |
fb09408a | 3695 | case 'u': |
fc7a59ce | 3696 | consumerd32_bin= optarg; |
ebaeda94 MD |
3697 | break; |
3698 | case 'U': | |
3699 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3700 | break; |
3701 | case 't': | |
fc7a59ce | 3702 | consumerd64_bin = optarg; |
ebaeda94 MD |
3703 | break; |
3704 | case 'T': | |
3705 | consumerd64_libdir = optarg; | |
fb09408a | 3706 | break; |
35f90c40 DG |
3707 | case 'p': |
3708 | opt_pidfile = optarg; | |
3709 | break; | |
fac6795d DG |
3710 | default: |
3711 | /* Unknown option or other error. | |
3712 | * Error is printed by getopt, just return */ | |
3713 | return -1; | |
3714 | } | |
3715 | } | |
3716 | ||
3717 | return 0; | |
3718 | } | |
3719 | ||
3720 | /* | |
d063d709 | 3721 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3722 | * apps_sock - The communication socket for all UST apps. |
3723 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3724 | */ |
cf3af59e | 3725 | static int init_daemon_socket(void) |
fac6795d DG |
3726 | { |
3727 | int ret = 0; | |
3728 | mode_t old_umask; | |
3729 | ||
3730 | old_umask = umask(0); | |
3731 | ||
3732 | /* Create client tool unix socket */ | |
d6f42150 DG |
3733 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3734 | if (client_sock < 0) { | |
3735 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3736 | ret = -1; |
3737 | goto end; | |
3738 | } | |
3739 | ||
b662582b DG |
3740 | /* Set the cloexec flag */ |
3741 | ret = utils_set_fd_cloexec(client_sock); | |
3742 | if (ret < 0) { | |
3743 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3744 | "Continuing but note that the consumer daemon will have a " | |
3745 | "reference to this socket on exec()", client_sock); | |
3746 | } | |
3747 | ||
fac6795d DG |
3748 | /* File permission MUST be 660 */ |
3749 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3750 | if (ret < 0) { | |
d6f42150 | 3751 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3752 | PERROR("chmod"); |
fac6795d DG |
3753 | goto end; |
3754 | } | |
3755 | ||
3756 | /* Create the application unix socket */ | |
d6f42150 DG |
3757 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3758 | if (apps_sock < 0) { | |
3759 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3760 | ret = -1; |
3761 | goto end; | |
3762 | } | |
3763 | ||
b662582b DG |
3764 | /* Set the cloexec flag */ |
3765 | ret = utils_set_fd_cloexec(apps_sock); | |
3766 | if (ret < 0) { | |
3767 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3768 | "Continuing but note that the consumer daemon will have a " | |
3769 | "reference to this socket on exec()", apps_sock); | |
3770 | } | |
3771 | ||
d6f42150 | 3772 | /* File permission MUST be 666 */ |
54d01ffb DG |
3773 | ret = chmod(apps_unix_sock_path, |
3774 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3775 | if (ret < 0) { |
d6f42150 | 3776 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3777 | PERROR("chmod"); |
fac6795d DG |
3778 | goto end; |
3779 | } | |
3780 | ||
b662582b DG |
3781 | DBG3("Session daemon client socket %d and application socket %d created", |
3782 | client_sock, apps_sock); | |
3783 | ||
fac6795d DG |
3784 | end: |
3785 | umask(old_umask); | |
3786 | return ret; | |
3787 | } | |
3788 | ||
3789 | /* | |
54d01ffb DG |
3790 | * Check if the global socket is available, and if a daemon is answering at the |
3791 | * other side. If yes, error is returned. | |
fac6795d | 3792 | */ |
cf3af59e | 3793 | static int check_existing_daemon(void) |
fac6795d | 3794 | { |
7d8234d9 | 3795 | /* Is there anybody out there ? */ |
099e26bd | 3796 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3797 | return -EEXIST; |
099e26bd | 3798 | } |
b09c7c76 DG |
3799 | |
3800 | return 0; | |
fac6795d DG |
3801 | } |
3802 | ||
fac6795d | 3803 | /* |
d063d709 | 3804 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3805 | * |
d063d709 | 3806 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3807 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3808 | */ |
be040666 | 3809 | static int set_permissions(char *rundir) |
fac6795d DG |
3810 | { |
3811 | int ret; | |
996b65c8 | 3812 | gid_t gid; |
fac6795d | 3813 | |
6775595e DG |
3814 | ret = allowed_group(); |
3815 | if (ret < 0) { | |
be040666 DG |
3816 | WARN("No tracing group detected"); |
3817 | ret = 0; | |
fac6795d DG |
3818 | goto end; |
3819 | } | |
3820 | ||
6775595e DG |
3821 | gid = ret; |
3822 | ||
d6f42150 | 3823 | /* Set lttng run dir */ |
be040666 | 3824 | ret = chown(rundir, 0, gid); |
d6f42150 | 3825 | if (ret < 0) { |
be040666 | 3826 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3827 | PERROR("chown"); |
d6f42150 DG |
3828 | } |
3829 | ||
d1613cf5 | 3830 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3831 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3832 | if (ret < 0) { |
3833 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3834 | PERROR("chmod"); |
d1613cf5 JN |
3835 | } |
3836 | ||
d6f42150 | 3837 | /* lttng client socket path */ |
996b65c8 | 3838 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3839 | if (ret < 0) { |
d6f42150 | 3840 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3841 | PERROR("chown"); |
d6f42150 DG |
3842 | } |
3843 | ||
3bd1e081 MD |
3844 | /* kconsumer error socket path */ |
3845 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3846 | if (ret < 0) { |
3bd1e081 | 3847 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3848 | PERROR("chown"); |
3bd1e081 MD |
3849 | } |
3850 | ||
7753dea8 MD |
3851 | /* 64-bit ustconsumer error socket path */ |
3852 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3853 | if (ret < 0) { | |
3854 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3855 | PERROR("chown"); |
7753dea8 MD |
3856 | } |
3857 | ||
3858 | /* 32-bit ustconsumer compat32 error socket path */ | |
3859 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3860 | if (ret < 0) { |
7753dea8 | 3861 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3862 | PERROR("chown"); |
fac6795d DG |
3863 | } |
3864 | ||
d6f42150 | 3865 | DBG("All permissions are set"); |
e07ae692 | 3866 | |
fac6795d DG |
3867 | end: |
3868 | return ret; | |
3869 | } | |
3870 | ||
d6f42150 | 3871 | /* |
d063d709 | 3872 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3873 | */ |
67e40797 | 3874 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3875 | { |
3876 | int ret; | |
3877 | ||
67e40797 DG |
3878 | DBG3("Creating LTTng run directory: %s", rundir); |
3879 | ||
d1613cf5 | 3880 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3881 | if (ret < 0) { |
b1f11e69 | 3882 | if (errno != EEXIST) { |
67e40797 | 3883 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3884 | goto error; |
3885 | } else { | |
3886 | ret = 0; | |
3887 | } | |
d6f42150 DG |
3888 | } |
3889 | ||
3890 | error: | |
3891 | return ret; | |
3892 | } | |
3893 | ||
3894 | /* | |
d063d709 DG |
3895 | * Setup sockets and directory needed by the kconsumerd communication with the |
3896 | * session daemon. | |
d6f42150 | 3897 | */ |
67e40797 DG |
3898 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3899 | const char *rundir) | |
d6f42150 DG |
3900 | { |
3901 | int ret; | |
67e40797 | 3902 | char path[PATH_MAX]; |
d6f42150 | 3903 | |
67e40797 | 3904 | switch (consumer_data->type) { |
7753dea8 | 3905 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3906 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3907 | break; |
3908 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3909 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3910 | break; |
3911 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3912 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3913 | break; |
3914 | default: | |
3915 | ERR("Consumer type unknown"); | |
3916 | ret = -EINVAL; | |
3917 | goto error; | |
d6f42150 DG |
3918 | } |
3919 | ||
67e40797 DG |
3920 | DBG2("Creating consumer directory: %s", path); |
3921 | ||
d1613cf5 | 3922 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3923 | if (ret < 0) { |
6beb2242 | 3924 | if (errno != EEXIST) { |
f11e84c2 | 3925 | PERROR("mkdir"); |
3bd1e081 | 3926 | ERR("Failed to create %s", path); |
6beb2242 DG |
3927 | goto error; |
3928 | } | |
f11e84c2 | 3929 | ret = -1; |
d6f42150 DG |
3930 | } |
3931 | ||
3932 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3933 | consumer_data->err_sock = |
3934 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3935 | if (consumer_data->err_sock < 0) { | |
3936 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3937 | ret = -1; |
3938 | goto error; | |
3939 | } | |
3940 | ||
3941 | /* File permission MUST be 660 */ | |
3bd1e081 | 3942 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3943 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3944 | if (ret < 0) { |
3bd1e081 | 3945 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3946 | PERROR("chmod"); |
d6f42150 DG |
3947 | goto error; |
3948 | } | |
3949 | ||
3950 | error: | |
3951 | return ret; | |
3952 | } | |
3953 | ||
fac6795d | 3954 | /* |
d063d709 | 3955 | * Signal handler for the daemon |
cf3af59e | 3956 | * |
54d01ffb DG |
3957 | * Simply stop all worker threads, leaving main() return gracefully after |
3958 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3959 | */ |
3960 | static void sighandler(int sig) | |
3961 | { | |
3962 | switch (sig) { | |
cf3af59e | 3963 | case SIGPIPE: |
af87c45a | 3964 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3965 | return; |
3966 | case SIGINT: | |
af87c45a | 3967 | DBG("SIGINT caught"); |
cf3af59e MD |
3968 | stop_threads(); |
3969 | break; | |
3970 | case SIGTERM: | |
af87c45a | 3971 | DBG("SIGTERM caught"); |
cf3af59e MD |
3972 | stop_threads(); |
3973 | break; | |
3974 | default: | |
3975 | break; | |
fac6795d | 3976 | } |
fac6795d DG |
3977 | } |
3978 | ||
3979 | /* | |
d063d709 | 3980 | * Setup signal handler for : |
1d4b027a | 3981 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3982 | */ |
1d4b027a | 3983 | static int set_signal_handler(void) |
fac6795d | 3984 | { |
1d4b027a DG |
3985 | int ret = 0; |
3986 | struct sigaction sa; | |
3987 | sigset_t sigset; | |
fac6795d | 3988 | |
1d4b027a | 3989 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3990 | PERROR("sigemptyset"); |
1d4b027a DG |
3991 | return ret; |
3992 | } | |
d6f42150 | 3993 | |
1d4b027a DG |
3994 | sa.sa_handler = sighandler; |
3995 | sa.sa_mask = sigset; | |
3996 | sa.sa_flags = 0; | |
3997 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3998 | PERROR("sigaction"); |
1d4b027a | 3999 | return ret; |
d6f42150 DG |
4000 | } |
4001 | ||
1d4b027a | 4002 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4003 | PERROR("sigaction"); |
1d4b027a | 4004 | return ret; |
d6f42150 | 4005 | } |
aaf26714 | 4006 | |
1d4b027a | 4007 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4008 | PERROR("sigaction"); |
1d4b027a | 4009 | return ret; |
8c0faa1d DG |
4010 | } |
4011 | ||
1d4b027a DG |
4012 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4013 | ||
4014 | return ret; | |
fac6795d DG |
4015 | } |
4016 | ||
f3ed775e | 4017 | /* |
d063d709 DG |
4018 | * Set open files limit to unlimited. This daemon can open a large number of |
4019 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4020 | */ |
4021 | static void set_ulimit(void) | |
4022 | { | |
4023 | int ret; | |
4024 | struct rlimit lim; | |
4025 | ||
a88df331 | 4026 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4027 | lim.rlim_cur = 65535; |
4028 | lim.rlim_max = 65535; | |
4029 | ||
4030 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4031 | if (ret < 0) { | |
76d7553f | 4032 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4033 | } |
4034 | } | |
4035 | ||
35f90c40 DG |
4036 | /* |
4037 | * Write pidfile using the rundir and opt_pidfile. | |
4038 | */ | |
4039 | static void write_pidfile(void) | |
4040 | { | |
4041 | int ret; | |
4042 | char pidfile_path[PATH_MAX]; | |
4043 | ||
4044 | assert(rundir); | |
4045 | ||
4046 | if (opt_pidfile) { | |
4047 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4048 | } else { | |
4049 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4050 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4051 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4052 | if (ret < 0) { | |
4053 | PERROR("snprintf pidfile path"); | |
4054 | goto error; | |
4055 | } | |
4056 | } | |
4057 | ||
4058 | /* | |
4059 | * Create pid file in rundir. Return value is of no importance. The | |
4060 | * execution will continue even though we are not able to write the file. | |
4061 | */ | |
4062 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4063 | ||
4064 | error: | |
4065 | return; | |
4066 | } | |
4067 | ||
fac6795d DG |
4068 | /* |
4069 | * main | |
4070 | */ | |
4071 | int main(int argc, char **argv) | |
4072 | { | |
fac6795d DG |
4073 | int ret = 0; |
4074 | void *status; | |
ae9e45b3 | 4075 | const char *home_path, *env_app_timeout; |
fac6795d | 4076 | |
335a95b7 MD |
4077 | init_kernel_workarounds(); |
4078 | ||
f6a9efaa DG |
4079 | rcu_register_thread(); |
4080 | ||
7753dea8 | 4081 | setup_consumerd_path(); |
fb09408a | 4082 | |
12744796 DG |
4083 | page_size = sysconf(_SC_PAGESIZE); |
4084 | if (page_size < 0) { | |
4085 | PERROR("sysconf _SC_PAGESIZE"); | |
4086 | page_size = LONG_MAX; | |
4087 | WARN("Fallback page size to %ld", page_size); | |
4088 | } | |
4089 | ||
fac6795d DG |
4090 | /* Parse arguments */ |
4091 | progname = argv[0]; | |
c617c0c6 | 4092 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 4093 | goto error; |
fac6795d DG |
4094 | } |
4095 | ||
4096 | /* Daemonize */ | |
4097 | if (opt_daemon) { | |
ceed52b5 MD |
4098 | int i; |
4099 | ||
4100 | /* | |
4101 | * fork | |
4102 | * child: setsid, close FD 0, 1, 2, chdir / | |
4103 | * parent: exit (if fork is successful) | |
4104 | */ | |
53094c05 DG |
4105 | ret = daemon(0, 0); |
4106 | if (ret < 0) { | |
76d7553f | 4107 | PERROR("daemon"); |
cf3af59e | 4108 | goto error; |
53094c05 | 4109 | } |
ceed52b5 MD |
4110 | /* |
4111 | * We are in the child. Make sure all other file | |
4112 | * descriptors are closed, in case we are called with | |
4113 | * more opened file descriptors than the standard ones. | |
4114 | */ | |
4115 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4116 | (void) close(i); | |
4117 | } | |
4118 | } | |
4119 | ||
4120 | /* Create thread quit pipe */ | |
4121 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4122 | goto error; | |
fac6795d DG |
4123 | } |
4124 | ||
4125 | /* Check if daemon is UID = 0 */ | |
4126 | is_root = !getuid(); | |
4127 | ||
fac6795d | 4128 | if (is_root) { |
990570ed | 4129 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4130 | |
4131 | /* Create global run dir with root access */ | |
4132 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4133 | if (ret < 0) { |
cf3af59e | 4134 | goto error; |
d6f42150 DG |
4135 | } |
4136 | ||
fac6795d | 4137 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4138 | snprintf(apps_unix_sock_path, PATH_MAX, |
4139 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4140 | } |
4141 | ||
4142 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4143 | snprintf(client_unix_sock_path, PATH_MAX, |
4144 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4145 | } | |
0fdd1e2c DG |
4146 | |
4147 | /* Set global SHM for ust */ | |
4148 | if (strlen(wait_shm_path) == 0) { | |
4149 | snprintf(wait_shm_path, PATH_MAX, | |
4150 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4151 | } | |
67e40797 | 4152 | |
44a5e5eb DG |
4153 | if (strlen(health_unix_sock_path) == 0) { |
4154 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4155 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4156 | } | |
4157 | ||
67e40797 DG |
4158 | /* Setup kernel consumerd path */ |
4159 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4160 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4161 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4162 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4163 | |
4164 | DBG2("Kernel consumer err path: %s", | |
4165 | kconsumer_data.err_unix_sock_path); | |
4166 | DBG2("Kernel consumer cmd path: %s", | |
4167 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4168 | } else { |
b082db07 DG |
4169 | home_path = get_home_dir(); |
4170 | if (home_path == NULL) { | |
273ea72c DG |
4171 | /* TODO: Add --socket PATH option */ |
4172 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4173 | ret = -EPERM; |
4174 | goto error; | |
b082db07 DG |
4175 | } |
4176 | ||
67e40797 DG |
4177 | /* |
4178 | * Create rundir from home path. This will create something like | |
4179 | * $HOME/.lttng | |
4180 | */ | |
990570ed | 4181 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4182 | if (ret < 0) { |
4183 | ret = -ENOMEM; | |
4184 | goto error; | |
4185 | } | |
4186 | ||
4187 | ret = create_lttng_rundir(rundir); | |
4188 | if (ret < 0) { | |
4189 | goto error; | |
4190 | } | |
4191 | ||
fac6795d | 4192 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4193 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4194 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4195 | } |
4196 | ||
4197 | /* Set the cli tool unix socket path */ | |
4198 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4199 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4200 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4201 | } |
0fdd1e2c DG |
4202 | |
4203 | /* Set global SHM for ust */ | |
4204 | if (strlen(wait_shm_path) == 0) { | |
4205 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4206 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4207 | } |
44a5e5eb DG |
4208 | |
4209 | /* Set health check Unix path */ | |
4210 | if (strlen(health_unix_sock_path) == 0) { | |
4211 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4212 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4213 | } | |
fac6795d DG |
4214 | } |
4215 | ||
5c827ce0 DG |
4216 | /* Set consumer initial state */ |
4217 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4218 | ust_consumerd_state = CONSUMER_STOPPED; | |
4219 | ||
847177cd DG |
4220 | DBG("Client socket path %s", client_unix_sock_path); |
4221 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4222 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4223 | DBG("LTTng run directory path: %s", rundir); |
4224 | ||
4225 | /* 32 bits consumerd path setup */ | |
4226 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4227 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4228 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4229 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4230 | |
4231 | DBG2("UST consumer 32 bits err path: %s", | |
4232 | ustconsumer32_data.err_unix_sock_path); | |
4233 | DBG2("UST consumer 32 bits cmd path: %s", | |
4234 | ustconsumer32_data.cmd_unix_sock_path); | |
4235 | ||
4236 | /* 64 bits consumerd path setup */ | |
4237 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4238 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4239 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4240 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4241 | |
4242 | DBG2("UST consumer 64 bits err path: %s", | |
4243 | ustconsumer64_data.err_unix_sock_path); | |
4244 | DBG2("UST consumer 64 bits cmd path: %s", | |
4245 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4246 | |
273ea72c | 4247 | /* |
7d8234d9 | 4248 | * See if daemon already exist. |
fac6795d | 4249 | */ |
7d8234d9 | 4250 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4251 | ERR("Already running daemon.\n"); |
273ea72c | 4252 | /* |
cf3af59e MD |
4253 | * We do not goto exit because we must not cleanup() |
4254 | * because a daemon is already running. | |
ab118b20 | 4255 | */ |
cf3af59e | 4256 | goto error; |
a88df331 DG |
4257 | } |
4258 | ||
1427f9b2 DG |
4259 | /* |
4260 | * Init UST app hash table. Alloc hash table before this point since | |
4261 | * cleanup() can get called after that point. | |
4262 | */ | |
4263 | ust_app_ht_alloc(); | |
4264 | ||
54d01ffb | 4265 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4266 | |
4267 | /* | |
4268 | * These actions must be executed as root. We do that *after* setting up | |
4269 | * the sockets path because we MUST make the check for another daemon using | |
4270 | * those paths *before* trying to set the kernel consumer sockets and init | |
4271 | * kernel tracer. | |
4272 | */ | |
4273 | if (is_root) { | |
67e40797 | 4274 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4275 | if (ret < 0) { |
4276 | goto exit; | |
4277 | } | |
4278 | ||
a88df331 | 4279 | /* Setup kernel tracer */ |
4fba7219 DG |
4280 | if (!opt_no_kernel) { |
4281 | init_kernel_tracer(); | |
4282 | } | |
a88df331 DG |
4283 | |
4284 | /* Set ulimit for open files */ | |
4285 | set_ulimit(); | |
fac6795d | 4286 | } |
4063050c MD |
4287 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4288 | lttng_fd_init(); | |
fac6795d | 4289 | |
67e40797 DG |
4290 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4291 | if (ret < 0) { | |
4292 | goto exit; | |
4293 | } | |
4294 | ||
4295 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4296 | if (ret < 0) { | |
4297 | goto exit; | |
4298 | } | |
4299 | ||
cf3af59e MD |
4300 | if ((ret = set_signal_handler()) < 0) { |
4301 | goto exit; | |
fac6795d DG |
4302 | } |
4303 | ||
d6f42150 | 4304 | /* Setup the needed unix socket */ |
cf3af59e MD |
4305 | if ((ret = init_daemon_socket()) < 0) { |
4306 | goto exit; | |
fac6795d DG |
4307 | } |
4308 | ||
4309 | /* Set credentials to socket */ | |
be040666 | 4310 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4311 | goto exit; |
fac6795d DG |
4312 | } |
4313 | ||
5b8719f5 DG |
4314 | /* Get parent pid if -S, --sig-parent is specified. */ |
4315 | if (opt_sig_parent) { | |
4316 | ppid = getppid(); | |
4317 | } | |
4318 | ||
7a485870 | 4319 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4320 | if (is_root && !opt_no_kernel) { |
4321 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4322 | goto exit; | |
4323 | } | |
7a485870 DG |
4324 | } |
4325 | ||
0b2dc8df MD |
4326 | /* Setup the thread ht_cleanup communication pipe. */ |
4327 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
4328 | goto exit; | |
4329 | } | |
4330 | ||
099e26bd | 4331 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4332 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4333 | goto exit; |
4334 | } | |
4335 | ||
d0b96690 DG |
4336 | /* Setup the thread apps notify communication pipe. */ |
4337 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4338 | goto exit; | |
4339 | } | |
4340 | ||
7972aab2 DG |
4341 | /* Initialize global buffer per UID and PID registry. */ |
4342 | buffer_reg_init_uid_registry(); | |
4343 | buffer_reg_init_pid_registry(); | |
4344 | ||
099e26bd DG |
4345 | /* Init UST command queue. */ |
4346 | cds_wfq_init(&ust_cmd_queue.queue); | |
4347 | ||
273ea72c | 4348 | /* |
54d01ffb DG |
4349 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4350 | * statically declared in session.c | |
273ea72c | 4351 | */ |
54d01ffb | 4352 | session_list_ptr = session_get_list(); |
b5541356 | 4353 | |
5eb91c98 DG |
4354 | /* Set up max poll set size */ |
4355 | lttng_poll_set_max_size(); | |
4356 | ||
2f77fc4b | 4357 | cmd_init(); |
00e2e675 | 4358 | |
ae9e45b3 DG |
4359 | /* Check for the application socket timeout env variable. */ |
4360 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4361 | if (env_app_timeout) { | |
4362 | app_socket_timeout = atoi(env_app_timeout); | |
4363 | } else { | |
4364 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4365 | } | |
4366 | ||
35f90c40 DG |
4367 | write_pidfile(); |
4368 | ||
0b2dc8df MD |
4369 | /* Create thread to manage the client socket */ |
4370 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
4371 | thread_ht_cleanup, (void *) NULL); | |
4372 | if (ret != 0) { | |
4373 | PERROR("pthread_create ht_cleanup"); | |
4374 | goto exit_ht_cleanup; | |
4375 | } | |
4376 | ||
44a5e5eb DG |
4377 | /* Create thread to manage the client socket */ |
4378 | ret = pthread_create(&health_thread, NULL, | |
4379 | thread_manage_health, (void *) NULL); | |
4380 | if (ret != 0) { | |
4381 | PERROR("pthread_create health"); | |
4382 | goto exit_health; | |
4383 | } | |
4384 | ||
cf3af59e | 4385 | /* Create thread to manage the client socket */ |
099e26bd DG |
4386 | ret = pthread_create(&client_thread, NULL, |
4387 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4388 | if (ret != 0) { |
76d7553f | 4389 | PERROR("pthread_create clients"); |
cf3af59e MD |
4390 | goto exit_client; |
4391 | } | |
fac6795d | 4392 | |
099e26bd DG |
4393 | /* Create thread to dispatch registration */ |
4394 | ret = pthread_create(&dispatch_thread, NULL, | |
4395 | thread_dispatch_ust_registration, (void *) NULL); | |
4396 | if (ret != 0) { | |
76d7553f | 4397 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4398 | goto exit_dispatch; |
4399 | } | |
4400 | ||
4401 | /* Create thread to manage application registration. */ | |
4402 | ret = pthread_create(®_apps_thread, NULL, | |
4403 | thread_registration_apps, (void *) NULL); | |
4404 | if (ret != 0) { | |
76d7553f | 4405 | PERROR("pthread_create registration"); |
099e26bd DG |
4406 | goto exit_reg_apps; |
4407 | } | |
4408 | ||
cf3af59e | 4409 | /* Create thread to manage application socket */ |
54d01ffb DG |
4410 | ret = pthread_create(&apps_thread, NULL, |
4411 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4412 | if (ret != 0) { |
d0b96690 DG |
4413 | PERROR("pthread_create apps"); |
4414 | goto exit_apps; | |
4415 | } | |
4416 | ||
4417 | /* Create thread to manage application notify socket */ | |
4418 | ret = pthread_create(&apps_notify_thread, NULL, | |
4419 | ust_thread_manage_notify, (void *) NULL); | |
4420 | if (ret != 0) { | |
76d7553f | 4421 | PERROR("pthread_create apps"); |
cf3af59e MD |
4422 | goto exit_apps; |
4423 | } | |
fac6795d | 4424 | |
6620da75 DG |
4425 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4426 | if (is_root && !opt_no_kernel) { | |
4427 | /* Create kernel thread to manage kernel event */ | |
4428 | ret = pthread_create(&kernel_thread, NULL, | |
4429 | thread_manage_kernel, (void *) NULL); | |
4430 | if (ret != 0) { | |
4431 | PERROR("pthread_create kernel"); | |
4432 | goto exit_kernel; | |
4433 | } | |
7a485870 | 4434 | |
6620da75 DG |
4435 | ret = pthread_join(kernel_thread, &status); |
4436 | if (ret != 0) { | |
4437 | PERROR("pthread_join"); | |
4438 | goto error; /* join error, exit without cleanup */ | |
4439 | } | |
fac6795d DG |
4440 | } |
4441 | ||
cf3af59e MD |
4442 | exit_kernel: |
4443 | ret = pthread_join(apps_thread, &status); | |
4444 | if (ret != 0) { | |
76d7553f | 4445 | PERROR("pthread_join"); |
cf3af59e MD |
4446 | goto error; /* join error, exit without cleanup */ |
4447 | } | |
fac6795d | 4448 | |
cf3af59e | 4449 | exit_apps: |
099e26bd DG |
4450 | ret = pthread_join(reg_apps_thread, &status); |
4451 | if (ret != 0) { | |
76d7553f | 4452 | PERROR("pthread_join"); |
099e26bd DG |
4453 | goto error; /* join error, exit without cleanup */ |
4454 | } | |
4455 | ||
4456 | exit_reg_apps: | |
4457 | ret = pthread_join(dispatch_thread, &status); | |
4458 | if (ret != 0) { | |
76d7553f | 4459 | PERROR("pthread_join"); |
099e26bd DG |
4460 | goto error; /* join error, exit without cleanup */ |
4461 | } | |
4462 | ||
4463 | exit_dispatch: | |
cf3af59e MD |
4464 | ret = pthread_join(client_thread, &status); |
4465 | if (ret != 0) { | |
76d7553f | 4466 | PERROR("pthread_join"); |
cf3af59e MD |
4467 | goto error; /* join error, exit without cleanup */ |
4468 | } | |
4469 | ||
3bd1e081 | 4470 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4471 | if (ret != 0) { |
76d7553f | 4472 | PERROR("join_consumer"); |
cf3af59e MD |
4473 | goto error; /* join error, exit without cleanup */ |
4474 | } | |
a88df331 | 4475 | |
06f525de DG |
4476 | ret = join_consumer_thread(&ustconsumer32_data); |
4477 | if (ret != 0) { | |
4478 | PERROR("join_consumer ust32"); | |
4479 | goto error; /* join error, exit without cleanup */ | |
4480 | } | |
4481 | ||
4482 | ret = join_consumer_thread(&ustconsumer64_data); | |
4483 | if (ret != 0) { | |
4484 | PERROR("join_consumer ust64"); | |
4485 | goto error; /* join error, exit without cleanup */ | |
4486 | } | |
4487 | ||
cf3af59e | 4488 | exit_client: |
06f525de DG |
4489 | ret = pthread_join(health_thread, &status); |
4490 | if (ret != 0) { | |
4491 | PERROR("pthread_join health thread"); | |
4492 | goto error; /* join error, exit without cleanup */ | |
4493 | } | |
4494 | ||
44a5e5eb | 4495 | exit_health: |
0b2dc8df MD |
4496 | ret = pthread_join(ht_cleanup_thread, &status); |
4497 | if (ret != 0) { | |
4498 | PERROR("pthread_join ht cleanup thread"); | |
4499 | goto error; /* join error, exit without cleanup */ | |
4500 | } | |
4501 | exit_ht_cleanup: | |
a88df331 | 4502 | exit: |
cf3af59e MD |
4503 | /* |
4504 | * cleanup() is called when no other thread is running. | |
4505 | */ | |
f6a9efaa | 4506 | rcu_thread_online(); |
cf3af59e | 4507 | cleanup(); |
f6a9efaa DG |
4508 | rcu_thread_offline(); |
4509 | rcu_unregister_thread(); | |
67e40797 | 4510 | if (!ret) { |
cf3af59e | 4511 | exit(EXIT_SUCCESS); |
67e40797 | 4512 | } |
cf3af59e | 4513 | error: |
5e16da05 | 4514 | exit(EXIT_FAILURE); |
fac6795d | 4515 | } |