Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
91d76f53 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
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; |
5eb91c98 | 164 | |
099e26bd DG |
165 | /* |
166 | * UST registration command queue. This queue is tied with a futex and uses a N | |
167 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
168 | * | |
169 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
170 | * this queue and the wait/wake scheme. | |
171 | */ | |
172 | static struct ust_cmd_queue ust_cmd_queue; | |
173 | ||
b5541356 DG |
174 | /* |
175 | * Pointer initialized before thread creation. | |
176 | * | |
177 | * This points to the tracing session list containing the session count and a | |
178 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
179 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 180 | * |
d063d709 | 181 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 182 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
183 | */ |
184 | static struct ltt_session_list *session_list_ptr; | |
185 | ||
7753dea8 MD |
186 | int ust_consumerd64_fd = -1; |
187 | int ust_consumerd32_fd = -1; | |
188 | ||
fb6f1fa2 YB |
189 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
190 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
191 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
192 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 193 | |
2f77fc4b DG |
194 | static const char *module_proc_lttng = "/proc/lttng"; |
195 | ||
5c827ce0 DG |
196 | /* |
197 | * Consumer daemon state which is changed when spawning it, killing it or in | |
198 | * case of a fatal error. | |
199 | */ | |
200 | enum consumerd_state { | |
201 | CONSUMER_STARTED = 1, | |
202 | CONSUMER_STOPPED = 2, | |
203 | CONSUMER_ERROR = 3, | |
204 | }; | |
205 | ||
206 | /* | |
207 | * This consumer daemon state is used to validate if a client command will be | |
208 | * able to reach the consumer. If not, the client is informed. For instance, | |
209 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
210 | * error to the client. | |
211 | * | |
212 | * The following example shows a possible race condition of this scheme: | |
213 | * | |
214 | * consumer thread error happens | |
215 | * client cmd arrives | |
216 | * client cmd checks state -> still OK | |
217 | * consumer thread exit, sets error | |
218 | * client cmd try to talk to consumer | |
219 | * ... | |
220 | * | |
221 | * However, since the consumer is a different daemon, we have no way of making | |
222 | * sure the command will reach it safely even with this state flag. This is why | |
223 | * we consider that up to the state validation during command processing, the | |
224 | * command is safe. After that, we can not guarantee the correctness of the | |
225 | * client request vis-a-vis the consumer. | |
226 | */ | |
227 | static enum consumerd_state ust_consumerd_state; | |
228 | static enum consumerd_state kernel_consumerd_state; | |
229 | ||
ae9e45b3 DG |
230 | /* |
231 | * Socket timeout for receiving and sending in seconds. | |
232 | */ | |
233 | static int app_socket_timeout; | |
234 | ||
12744796 DG |
235 | /* Set in main() with the current page size. */ |
236 | long page_size; | |
237 | ||
fb09408a | 238 | static |
7753dea8 | 239 | void setup_consumerd_path(void) |
fb09408a | 240 | { |
fc7a59ce | 241 | const char *bin, *libdir; |
fb09408a | 242 | |
7753dea8 MD |
243 | /* |
244 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
245 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
246 | * has not been defined. | |
7753dea8 | 247 | */ |
ebaeda94 | 248 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
249 | if (!consumerd32_bin[0]) { |
250 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
251 | } |
252 | if (!consumerd32_libdir[0]) { | |
253 | consumerd32_libdir = INSTALL_LIB_PATH; | |
254 | } | |
255 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
256 | if (!consumerd64_bin[0]) { |
257 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 258 | } |
ebaeda94 MD |
259 | if (!consumerd64_libdir[0]) { |
260 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
261 | } |
262 | #else | |
263 | #error "Unknown bitness" | |
264 | #endif | |
265 | ||
fb09408a MD |
266 | /* |
267 | * runtime env. var. overrides the build default. | |
268 | */ | |
fc7a59ce AM |
269 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
270 | if (bin) { | |
271 | consumerd32_bin = bin; | |
7753dea8 | 272 | } |
fc7a59ce AM |
273 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
274 | if (bin) { | |
275 | consumerd64_bin = bin; | |
ebaeda94 | 276 | } |
72f579ee | 277 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
278 | if (libdir) { |
279 | consumerd32_libdir = libdir; | |
280 | } | |
72f579ee | 281 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
282 | if (libdir) { |
283 | consumerd64_libdir = libdir; | |
fb09408a MD |
284 | } |
285 | } | |
286 | ||
5eb91c98 DG |
287 | /* |
288 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
289 | */ | |
d0b96690 | 290 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
291 | { |
292 | int ret; | |
293 | ||
d0b96690 | 294 | assert(events); |
5eb91c98 DG |
295 | |
296 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
297 | if (ret < 0) { | |
298 | goto error; | |
299 | } | |
300 | ||
301 | /* Add quit pipe */ | |
d0b96690 | 302 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
303 | if (ret < 0) { |
304 | goto error; | |
305 | } | |
306 | ||
307 | return 0; | |
308 | ||
309 | error: | |
310 | return ret; | |
311 | } | |
312 | ||
313 | /* | |
314 | * Check if the thread quit pipe was triggered. | |
315 | * | |
316 | * Return 1 if it was triggered else 0; | |
317 | */ | |
d0b96690 | 318 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
319 | { |
320 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
321 | return 1; | |
322 | } | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
0fdd1e2c DG |
327 | /* |
328 | * Return group ID of the tracing group or -1 if not found. | |
329 | */ | |
996b65c8 MD |
330 | static gid_t allowed_group(void) |
331 | { | |
332 | struct group *grp; | |
333 | ||
274e143b MD |
334 | if (opt_tracing_group) { |
335 | grp = getgrnam(opt_tracing_group); | |
336 | } else { | |
337 | grp = getgrnam(default_tracing_group); | |
338 | } | |
996b65c8 MD |
339 | if (!grp) { |
340 | return -1; | |
341 | } else { | |
342 | return grp->gr_gid; | |
343 | } | |
344 | } | |
345 | ||
273ea72c | 346 | /* |
5eb91c98 | 347 | * Init thread quit pipe. |
273ea72c DG |
348 | * |
349 | * Return -1 on error or 0 if all pipes are created. | |
350 | */ | |
351 | static int init_thread_quit_pipe(void) | |
352 | { | |
730389d9 | 353 | int ret, i; |
273ea72c | 354 | |
730389d9 | 355 | ret = pipe(thread_quit_pipe); |
273ea72c | 356 | if (ret < 0) { |
730389d9 | 357 | PERROR("thread quit pipe"); |
273ea72c DG |
358 | goto error; |
359 | } | |
360 | ||
730389d9 DG |
361 | for (i = 0; i < 2; i++) { |
362 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
363 | if (ret < 0) { | |
364 | PERROR("fcntl"); | |
365 | goto error; | |
366 | } | |
367 | } | |
368 | ||
273ea72c DG |
369 | error: |
370 | return ret; | |
371 | } | |
372 | ||
099e26bd DG |
373 | /* |
374 | * Stop all threads by closing the thread quit pipe. | |
375 | */ | |
cf3af59e MD |
376 | static void stop_threads(void) |
377 | { | |
5eb91c98 DG |
378 | int ret; |
379 | ||
cf3af59e MD |
380 | /* Stopping all threads */ |
381 | DBG("Terminating all threads"); | |
54d01ffb | 382 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
383 | if (ret < 0) { |
384 | ERR("write error on thread quit pipe"); | |
385 | } | |
386 | ||
099e26bd | 387 | /* Dispatch thread */ |
26c9d55e | 388 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 389 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
390 | } |
391 | ||
fac6795d | 392 | /* |
d063d709 | 393 | * Cleanup the daemon |
fac6795d | 394 | */ |
cf3af59e | 395 | static void cleanup(void) |
fac6795d | 396 | { |
ef599319 | 397 | int ret; |
6620da75 | 398 | char *cmd = NULL; |
af9737e9 | 399 | struct ltt_session *sess, *stmp; |
fac6795d | 400 | |
1d4b027a | 401 | DBG("Cleaning up"); |
e07ae692 | 402 | |
2f77fc4b DG |
403 | /* First thing first, stop all threads */ |
404 | utils_close_pipe(thread_quit_pipe); | |
405 | ||
35f90c40 DG |
406 | /* |
407 | * If opt_pidfile is undefined, the default file will be wiped when | |
408 | * removing the rundir. | |
409 | */ | |
410 | if (opt_pidfile) { | |
411 | ret = remove(opt_pidfile); | |
412 | if (ret < 0) { | |
413 | PERROR("remove pidfile %s", opt_pidfile); | |
414 | } | |
415 | } | |
416 | ||
67e40797 DG |
417 | DBG("Removing %s directory", rundir); |
418 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
419 | if (ret < 0) { | |
420 | ERR("asprintf failed. Something is really wrong!"); | |
421 | } | |
5461b305 | 422 | |
67e40797 DG |
423 | /* Remove lttng run directory */ |
424 | ret = system(cmd); | |
425 | if (ret < 0) { | |
426 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 427 | } |
67e40797 | 428 | free(cmd); |
bd69add2 | 429 | free(rundir); |
5461b305 | 430 | |
99bab54f | 431 | DBG("Cleaning up all sessions"); |
fac6795d | 432 | |
b5541356 | 433 | /* Destroy session list mutex */ |
273ea72c DG |
434 | if (session_list_ptr != NULL) { |
435 | pthread_mutex_destroy(&session_list_ptr->lock); | |
436 | ||
437 | /* Cleanup ALL session */ | |
54d01ffb DG |
438 | cds_list_for_each_entry_safe(sess, stmp, |
439 | &session_list_ptr->head, list) { | |
2f77fc4b | 440 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
441 | } |
442 | } | |
443 | ||
099e26bd | 444 | DBG("Closing all UST sockets"); |
56fff090 | 445 | ust_app_clean_list(); |
7972aab2 | 446 | buffer_reg_destroy_registries(); |
099e26bd | 447 | |
4fba7219 DG |
448 | if (is_root && !opt_no_kernel) { |
449 | DBG2("Closing kernel fd"); | |
a4b35e07 | 450 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
451 | ret = close(kernel_tracer_fd); |
452 | if (ret) { | |
453 | PERROR("close"); | |
454 | } | |
a4b35e07 | 455 | } |
2f50c8a3 | 456 | DBG("Unloading kernel modules"); |
096102bd | 457 | modprobe_remove_lttng_all(); |
2f50c8a3 | 458 | } |
2f77fc4b | 459 | |
421cb601 | 460 | /* <fun> */ |
f56a39af | 461 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
462 | "Matthew, BEET driven development works!%c[%dm", |
463 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
464 | /* </fun> */ | |
fac6795d DG |
465 | } |
466 | ||
e065084a | 467 | /* |
d063d709 | 468 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 469 | * |
d063d709 | 470 | * Return lttcomm error code. |
e065084a DG |
471 | */ |
472 | static int send_unix_sock(int sock, void *buf, size_t len) | |
473 | { | |
474 | /* Check valid length */ | |
c617c0c6 | 475 | if (len == 0) { |
e065084a DG |
476 | return -1; |
477 | } | |
478 | ||
479 | return lttcomm_send_unix_sock(sock, buf, len); | |
480 | } | |
481 | ||
5461b305 | 482 | /* |
d063d709 | 483 | * Free memory of a command context structure. |
5461b305 | 484 | */ |
a2fb29a5 | 485 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 486 | { |
a2fb29a5 DG |
487 | DBG("Clean command context structure"); |
488 | if (*cmd_ctx) { | |
489 | if ((*cmd_ctx)->llm) { | |
490 | free((*cmd_ctx)->llm); | |
5461b305 | 491 | } |
a2fb29a5 DG |
492 | if ((*cmd_ctx)->lsm) { |
493 | free((*cmd_ctx)->lsm); | |
5461b305 | 494 | } |
a2fb29a5 DG |
495 | free(*cmd_ctx); |
496 | *cmd_ctx = NULL; | |
5461b305 DG |
497 | } |
498 | } | |
499 | ||
fac6795d | 500 | /* |
0fdd1e2c | 501 | * Notify UST applications using the shm mmap futex. |
fac6795d | 502 | */ |
0fdd1e2c | 503 | static int notify_ust_apps(int active) |
fac6795d | 504 | { |
0fdd1e2c | 505 | char *wait_shm_mmap; |
fac6795d | 506 | |
0fdd1e2c | 507 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 508 | |
0fdd1e2c DG |
509 | /* See shm.c for this call implying mmap, shm and futex calls */ |
510 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
511 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
512 | goto error; |
513 | } | |
514 | ||
0fdd1e2c DG |
515 | /* Wake waiting process */ |
516 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
517 | ||
518 | /* Apps notified successfully */ | |
519 | return 0; | |
fac6795d DG |
520 | |
521 | error: | |
0fdd1e2c | 522 | return -1; |
fac6795d DG |
523 | } |
524 | ||
e065084a | 525 | /* |
d063d709 DG |
526 | * Setup the outgoing data buffer for the response (llm) by allocating the |
527 | * right amount of memory and copying the original information from the lsm | |
528 | * structure. | |
ca95a216 | 529 | * |
d063d709 | 530 | * Return total size of the buffer pointed by buf. |
ca95a216 | 531 | */ |
5461b305 | 532 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 533 | { |
f3ed775e | 534 | int ret, buf_size; |
ca95a216 | 535 | |
f3ed775e | 536 | buf_size = size; |
5461b305 | 537 | |
ba7f0ae5 | 538 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 539 | if (cmd_ctx->llm == NULL) { |
76d7553f | 540 | PERROR("zmalloc"); |
5461b305 | 541 | ret = -ENOMEM; |
ca95a216 DG |
542 | goto error; |
543 | } | |
544 | ||
5461b305 DG |
545 | /* Copy common data */ |
546 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 547 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 548 | |
5461b305 DG |
549 | cmd_ctx->llm->data_size = size; |
550 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
551 | ||
ca95a216 DG |
552 | return buf_size; |
553 | ||
554 | error: | |
555 | return ret; | |
556 | } | |
557 | ||
7a485870 | 558 | /* |
5eb91c98 | 559 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 560 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 561 | */ |
5eb91c98 | 562 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 563 | { |
5eb91c98 | 564 | int ret; |
7a485870 DG |
565 | struct ltt_session *session; |
566 | struct ltt_kernel_channel *channel; | |
567 | ||
5eb91c98 | 568 | DBG("Updating kernel poll set"); |
7a485870 | 569 | |
54d01ffb | 570 | session_lock_list(); |
b5541356 | 571 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 572 | session_lock(session); |
7a485870 | 573 | if (session->kernel_session == NULL) { |
54d01ffb | 574 | session_unlock(session); |
7a485870 DG |
575 | continue; |
576 | } | |
7a485870 | 577 | |
54d01ffb DG |
578 | cds_list_for_each_entry(channel, |
579 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
580 | /* Add channel fd to the kernel poll set */ |
581 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
582 | if (ret < 0) { | |
54d01ffb | 583 | session_unlock(session); |
5eb91c98 DG |
584 | goto error; |
585 | } | |
586 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 587 | } |
54d01ffb | 588 | session_unlock(session); |
7a485870 | 589 | } |
54d01ffb | 590 | session_unlock_list(); |
7a485870 | 591 | |
5eb91c98 | 592 | return 0; |
7a485870 DG |
593 | |
594 | error: | |
54d01ffb | 595 | session_unlock_list(); |
7a485870 DG |
596 | return -1; |
597 | } | |
598 | ||
599 | /* | |
54d01ffb | 600 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 601 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 602 | * |
d063d709 | 603 | * Useful for CPU hotplug feature. |
7a485870 | 604 | */ |
2bdd86d4 | 605 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
606 | { |
607 | int ret = 0; | |
608 | struct ltt_session *session; | |
173af62f | 609 | struct ltt_kernel_session *ksess; |
7a485870 DG |
610 | struct ltt_kernel_channel *channel; |
611 | ||
612 | DBG("Updating kernel streams for channel fd %d", fd); | |
613 | ||
54d01ffb | 614 | session_lock_list(); |
b5541356 | 615 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 616 | session_lock(session); |
7a485870 | 617 | if (session->kernel_session == NULL) { |
54d01ffb | 618 | session_unlock(session); |
7a485870 DG |
619 | continue; |
620 | } | |
173af62f | 621 | ksess = session->kernel_session; |
d9800920 | 622 | |
173af62f | 623 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
624 | if (channel->fd == fd) { |
625 | DBG("Channel found, updating kernel streams"); | |
626 | ret = kernel_open_channel_stream(channel); | |
627 | if (ret < 0) { | |
b3c750d2 | 628 | goto error; |
7a485870 | 629 | } |
d9800920 | 630 | |
7a485870 | 631 | /* |
5eb91c98 DG |
632 | * Have we already sent fds to the consumer? If yes, it means |
633 | * that tracing is started so it is safe to send our updated | |
634 | * stream fds. | |
7a485870 | 635 | */ |
173af62f DG |
636 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
637 | struct lttng_ht_iter iter; | |
638 | struct consumer_socket *socket; | |
639 | ||
e7fe706f | 640 | rcu_read_lock(); |
173af62f DG |
641 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
642 | &iter.iter, socket, node.node) { | |
643 | /* Code flow error */ | |
644 | assert(socket->fd >= 0); | |
645 | ||
646 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 647 | ret = kernel_consumer_send_channel_stream(socket, |
173af62f DG |
648 | channel, ksess); |
649 | pthread_mutex_unlock(socket->lock); | |
650 | if (ret < 0) { | |
e7fe706f | 651 | rcu_read_unlock(); |
173af62f DG |
652 | goto error; |
653 | } | |
7a485870 | 654 | } |
e7fe706f | 655 | rcu_read_unlock(); |
7a485870 | 656 | } |
b3c750d2 | 657 | goto error; |
7a485870 DG |
658 | } |
659 | } | |
54d01ffb | 660 | session_unlock(session); |
7a485870 | 661 | } |
54d01ffb | 662 | session_unlock_list(); |
b3c750d2 | 663 | return ret; |
7a485870 | 664 | |
b3c750d2 | 665 | error: |
54d01ffb DG |
666 | session_unlock(session); |
667 | session_unlock_list(); | |
7a485870 DG |
668 | return ret; |
669 | } | |
670 | ||
487cf67c | 671 | /* |
ffe60014 DG |
672 | * For each tracing session, update newly registered apps. The session list |
673 | * lock MUST be acquired before calling this. | |
487cf67c DG |
674 | */ |
675 | static void update_ust_app(int app_sock) | |
676 | { | |
677 | struct ltt_session *sess, *stmp; | |
678 | ||
679 | /* For all tracing session(s) */ | |
680 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 681 | session_lock(sess); |
421cb601 DG |
682 | if (sess->ust_session) { |
683 | ust_app_global_update(sess->ust_session, app_sock); | |
684 | } | |
4ee14516 | 685 | session_unlock(sess); |
487cf67c DG |
686 | } |
687 | } | |
688 | ||
7a485870 | 689 | /* |
d063d709 | 690 | * This thread manage event coming from the kernel. |
7a485870 | 691 | * |
d063d709 DG |
692 | * Features supported in this thread: |
693 | * -) CPU Hotplug | |
7a485870 DG |
694 | */ |
695 | static void *thread_manage_kernel(void *data) | |
696 | { | |
139ac872 | 697 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 698 | uint32_t revents, nb_fd; |
7a485870 | 699 | char tmp; |
5eb91c98 | 700 | struct lttng_poll_event events; |
7a485870 | 701 | |
6993eeb3 | 702 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 703 | |
927ca06a DG |
704 | health_register(HEALTH_TYPE_KERNEL); |
705 | ||
d5d63bf1 DG |
706 | /* |
707 | * This first step of the while is to clean this structure which could free | |
708 | * non NULL pointers so zero it before the loop. | |
709 | */ | |
710 | memset(&events, 0, sizeof(events)); | |
711 | ||
6993eeb3 CB |
712 | if (testpoint(thread_manage_kernel)) { |
713 | goto error_testpoint; | |
714 | } | |
8ac94142 | 715 | |
840cb59c | 716 | health_code_update(); |
44a5e5eb | 717 | |
6993eeb3 | 718 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 719 | goto error_testpoint; |
6993eeb3 CB |
720 | } |
721 | ||
7a485870 | 722 | while (1) { |
840cb59c | 723 | health_code_update(); |
44a5e5eb | 724 | |
7a485870 | 725 | if (update_poll_flag == 1) { |
d21b0d71 DG |
726 | /* Clean events object. We are about to populate it again. */ |
727 | lttng_poll_clean(&events); | |
728 | ||
d0b96690 | 729 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
730 | if (ret < 0) { |
731 | goto error_poll_create; | |
732 | } | |
733 | ||
734 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
735 | if (ret < 0) { | |
736 | goto error; | |
737 | } | |
5f822d0a | 738 | |
d21b0d71 | 739 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
740 | ret = update_kernel_poll(&events); |
741 | if (ret < 0) { | |
7a485870 DG |
742 | goto error; |
743 | } | |
744 | update_poll_flag = 0; | |
745 | } | |
746 | ||
d21b0d71 | 747 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
748 | |
749 | /* Poll infinite value of time */ | |
88f2b785 | 750 | restart: |
a78af745 | 751 | health_poll_entry(); |
5eb91c98 | 752 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 753 | health_poll_exit(); |
7a485870 | 754 | if (ret < 0) { |
88f2b785 MD |
755 | /* |
756 | * Restart interrupted system call. | |
757 | */ | |
758 | if (errno == EINTR) { | |
759 | goto restart; | |
760 | } | |
7a485870 DG |
761 | goto error; |
762 | } else if (ret == 0) { | |
763 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
764 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
765 | "This should not have happened! Continuing..."); | |
7a485870 DG |
766 | continue; |
767 | } | |
768 | ||
0d9c5d77 DG |
769 | nb_fd = ret; |
770 | ||
5eb91c98 DG |
771 | for (i = 0; i < nb_fd; i++) { |
772 | /* Fetch once the poll data */ | |
773 | revents = LTTNG_POLL_GETEV(&events, i); | |
774 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 775 | |
840cb59c | 776 | health_code_update(); |
44a5e5eb | 777 | |
5eb91c98 | 778 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 779 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 780 | if (ret) { |
139ac872 MD |
781 | err = 0; |
782 | goto exit; | |
5eb91c98 | 783 | } |
7a485870 | 784 | |
5eb91c98 DG |
785 | /* Check for data on kernel pipe */ |
786 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
f921c78f DG |
787 | do { |
788 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
789 | } while (ret < 0 && errno == EINTR); | |
790 | /* | |
791 | * Ret value is useless here, if this pipe gets any actions an | |
792 | * update is required anyway. | |
793 | */ | |
5eb91c98 DG |
794 | update_poll_flag = 1; |
795 | continue; | |
796 | } else { | |
797 | /* | |
798 | * New CPU detected by the kernel. Adding kernel stream to | |
799 | * kernel session and updating the kernel consumer | |
800 | */ | |
801 | if (revents & LPOLLIN) { | |
2bdd86d4 | 802 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
803 | if (ret < 0) { |
804 | continue; | |
805 | } | |
806 | break; | |
807 | /* | |
808 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
809 | * and unregister kernel stream at this point. | |
810 | */ | |
7a485870 | 811 | } |
7a485870 DG |
812 | } |
813 | } | |
814 | } | |
815 | ||
139ac872 | 816 | exit: |
7a485870 | 817 | error: |
5eb91c98 | 818 | lttng_poll_clean(&events); |
76d7553f | 819 | error_poll_create: |
6993eeb3 | 820 | error_testpoint: |
6620da75 DG |
821 | utils_close_pipe(kernel_poll_pipe); |
822 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 823 | if (err) { |
840cb59c | 824 | health_error(); |
139ac872 | 825 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
826 | WARN("Kernel thread died unexpectedly. " |
827 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 828 | } |
927ca06a | 829 | health_unregister(); |
76d7553f | 830 | DBG("Kernel thread dying"); |
7a485870 DG |
831 | return NULL; |
832 | } | |
833 | ||
a23ec3a7 DG |
834 | /* |
835 | * Signal pthread condition of the consumer data that the thread. | |
836 | */ | |
837 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
838 | { | |
839 | pthread_mutex_lock(&data->cond_mutex); | |
840 | ||
841 | /* | |
842 | * The state is set before signaling. It can be any value, it's the waiter | |
843 | * job to correctly interpret this condition variable associated to the | |
844 | * consumer pthread_cond. | |
845 | * | |
846 | * A value of 0 means that the corresponding thread of the consumer data | |
847 | * was not started. 1 indicates that the thread has started and is ready | |
848 | * for action. A negative value means that there was an error during the | |
849 | * thread bootstrap. | |
850 | */ | |
851 | data->consumer_thread_is_ready = state; | |
852 | (void) pthread_cond_signal(&data->cond); | |
853 | ||
854 | pthread_mutex_unlock(&data->cond_mutex); | |
855 | } | |
856 | ||
1d4b027a | 857 | /* |
3bd1e081 | 858 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 859 | */ |
3bd1e081 | 860 | static void *thread_manage_consumer(void *data) |
1d4b027a | 861 | { |
139ac872 | 862 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 863 | uint32_t revents, nb_fd; |
1d4b027a | 864 | enum lttcomm_return_code code; |
5eb91c98 | 865 | struct lttng_poll_event events; |
3bd1e081 | 866 | struct consumer_data *consumer_data = data; |
1d4b027a | 867 | |
3bd1e081 | 868 | DBG("[thread] Manage consumer started"); |
1d4b027a | 869 | |
927ca06a DG |
870 | health_register(HEALTH_TYPE_CONSUMER); |
871 | ||
855060f8 | 872 | health_code_update(); |
9449cc75 | 873 | |
5eb91c98 | 874 | /* |
331744e3 JD |
875 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
876 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 877 | */ |
331744e3 | 878 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 879 | if (ret < 0) { |
76d7553f | 880 | goto error_poll; |
5eb91c98 | 881 | } |
273ea72c | 882 | |
edb8b045 DG |
883 | /* |
884 | * The error socket here is already in a listening state which was done | |
885 | * just before spawning this thread to avoid a race between the consumer | |
886 | * daemon exec trying to connect and the listen() call. | |
887 | */ | |
3bd1e081 | 888 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
889 | if (ret < 0) { |
890 | goto error; | |
891 | } | |
892 | ||
840cb59c | 893 | health_code_update(); |
44a5e5eb | 894 | |
331744e3 | 895 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 896 | restart: |
a78af745 | 897 | health_poll_entry(); |
8ac94142 | 898 | |
6993eeb3 CB |
899 | if (testpoint(thread_manage_consumer)) { |
900 | goto error; | |
901 | } | |
8ac94142 | 902 | |
5eb91c98 | 903 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 904 | health_poll_exit(); |
273ea72c | 905 | if (ret < 0) { |
88f2b785 MD |
906 | /* |
907 | * Restart interrupted system call. | |
908 | */ | |
909 | if (errno == EINTR) { | |
910 | goto restart; | |
911 | } | |
273ea72c DG |
912 | goto error; |
913 | } | |
914 | ||
0d9c5d77 DG |
915 | nb_fd = ret; |
916 | ||
5eb91c98 DG |
917 | for (i = 0; i < nb_fd; i++) { |
918 | /* Fetch once the poll data */ | |
919 | revents = LTTNG_POLL_GETEV(&events, i); | |
920 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
921 | ||
840cb59c | 922 | health_code_update(); |
44a5e5eb | 923 | |
5eb91c98 | 924 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 925 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 926 | if (ret) { |
139ac872 MD |
927 | err = 0; |
928 | goto exit; | |
5eb91c98 DG |
929 | } |
930 | ||
931 | /* Event on the registration socket */ | |
3bd1e081 | 932 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 933 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 934 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
935 | goto error; |
936 | } | |
937 | } | |
273ea72c DG |
938 | } |
939 | ||
3bd1e081 | 940 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
941 | if (sock < 0) { |
942 | goto error; | |
943 | } | |
944 | ||
b662582b DG |
945 | /* |
946 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
947 | * show must go on. | |
948 | */ | |
949 | (void) utils_set_fd_cloexec(sock); | |
950 | ||
840cb59c | 951 | health_code_update(); |
44a5e5eb | 952 | |
3bd1e081 | 953 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 954 | |
712ea556 | 955 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
956 | ret = lttcomm_recv_unix_sock(sock, &code, |
957 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
958 | if (ret <= 0) { |
959 | goto error; | |
960 | } | |
961 | ||
840cb59c | 962 | health_code_update(); |
44a5e5eb | 963 | |
f73fabfd | 964 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 965 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
966 | consumer_data->cmd_sock = |
967 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
331744e3 JD |
968 | consumer_data->metadata_sock.fd = |
969 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
970 | if (consumer_data->cmd_sock < 0 || | |
971 | consumer_data->metadata_sock.fd < 0) { | |
972 | PERROR("consumer connect cmd socket"); | |
a23ec3a7 DG |
973 | /* On error, signal condition and quit. */ |
974 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
975 | goto error; |
976 | } | |
331744e3 JD |
977 | /* Create metadata socket lock. */ |
978 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
979 | if (consumer_data->metadata_sock.lock == NULL) { | |
980 | PERROR("zmalloc pthread mutex"); | |
981 | ret = -1; | |
982 | goto error; | |
983 | } | |
984 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
985 | ||
a23ec3a7 | 986 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
987 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
988 | DBG("Consumer metadata socket ready (fd: %d)", | |
989 | consumer_data->metadata_sock.fd); | |
1d4b027a | 990 | } else { |
3bd1e081 | 991 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
992 | lttcomm_get_readable_code(-code)); |
993 | goto error; | |
994 | } | |
995 | ||
331744e3 | 996 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 997 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 998 | if (ret < 0) { |
72079cae DG |
999 | goto error; |
1000 | } | |
1001 | ||
331744e3 | 1002 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1003 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1004 | if (ret < 0) { | |
72079cae | 1005 | goto error; |
5eb91c98 DG |
1006 | } |
1007 | ||
331744e3 JD |
1008 | /* Add metadata socket that is successfully connected. */ |
1009 | ret = lttng_poll_add(&events, consumer_data->metadata_sock.fd, | |
1010 | LPOLLIN | LPOLLRDHUP); | |
1011 | if (ret < 0) { | |
1012 | goto error; | |
1013 | } | |
1014 | ||
840cb59c | 1015 | health_code_update(); |
44a5e5eb | 1016 | |
331744e3 | 1017 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1018 | restart_poll: |
331744e3 JD |
1019 | while (1) { |
1020 | health_poll_entry(); | |
1021 | ret = lttng_poll_wait(&events, -1); | |
1022 | health_poll_exit(); | |
1023 | if (ret < 0) { | |
1024 | /* | |
1025 | * Restart interrupted system call. | |
1026 | */ | |
1027 | if (errno == EINTR) { | |
1028 | goto restart_poll; | |
1029 | } | |
1030 | goto error; | |
88f2b785 | 1031 | } |
72079cae | 1032 | |
331744e3 | 1033 | nb_fd = ret; |
0d9c5d77 | 1034 | |
331744e3 JD |
1035 | for (i = 0; i < nb_fd; i++) { |
1036 | /* Fetch once the poll data */ | |
1037 | revents = LTTNG_POLL_GETEV(&events, i); | |
1038 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1039 | |
331744e3 | 1040 | health_code_update(); |
44a5e5eb | 1041 | |
331744e3 JD |
1042 | /* Thread quit pipe has been closed. Killing thread. */ |
1043 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1044 | if (ret) { | |
1045 | err = 0; | |
1046 | goto exit; | |
1047 | } | |
5eb91c98 | 1048 | |
331744e3 JD |
1049 | if (pollfd == sock) { |
1050 | /* Event on the consumerd socket */ | |
1051 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1052 | ERR("consumer err socket second poll error"); | |
1053 | goto error; | |
1054 | } | |
1055 | health_code_update(); | |
1056 | /* Wait for any kconsumerd error */ | |
1057 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1058 | sizeof(enum lttcomm_return_code)); | |
1059 | if (ret <= 0) { | |
1060 | ERR("consumer closed the command socket"); | |
1061 | goto error; | |
1062 | } | |
1063 | ||
1064 | ERR("consumer return code : %s", | |
1065 | lttcomm_get_readable_code(-code)); | |
1066 | ||
1067 | goto exit; | |
1068 | } else if (pollfd == consumer_data->metadata_sock.fd) { | |
1069 | /* UST metadata requests */ | |
1070 | ret = ust_consumer_metadata_request( | |
1071 | &consumer_data->metadata_sock); | |
1072 | if (ret < 0) { | |
1073 | ERR("Handling metadata request"); | |
1074 | goto error; | |
1075 | } | |
1076 | break; | |
1077 | } else { | |
1078 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1079 | goto error; |
1080 | } | |
1081 | } | |
331744e3 | 1082 | health_code_update(); |
5eb91c98 DG |
1083 | } |
1084 | ||
139ac872 | 1085 | exit: |
1d4b027a | 1086 | error: |
5c827ce0 DG |
1087 | /* Immediately set the consumerd state to stopped */ |
1088 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1089 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1090 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1091 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1092 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1093 | } else { | |
1094 | /* Code flow error... */ | |
1095 | assert(0); | |
1096 | } | |
1097 | ||
76d7553f MD |
1098 | if (consumer_data->err_sock >= 0) { |
1099 | ret = close(consumer_data->err_sock); | |
1100 | if (ret) { | |
1101 | PERROR("close"); | |
1102 | } | |
1103 | } | |
1104 | if (consumer_data->cmd_sock >= 0) { | |
1105 | ret = close(consumer_data->cmd_sock); | |
1106 | if (ret) { | |
1107 | PERROR("close"); | |
1108 | } | |
1109 | } | |
331744e3 JD |
1110 | if (consumer_data->metadata_sock.fd >= 0) { |
1111 | ret = close(consumer_data->metadata_sock.fd); | |
1112 | if (ret) { | |
1113 | PERROR("close"); | |
1114 | } | |
1115 | } | |
1116 | /* Cleanup metadata socket mutex. */ | |
1117 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1118 | free(consumer_data->metadata_sock.lock); | |
1119 | ||
76d7553f MD |
1120 | if (sock >= 0) { |
1121 | ret = close(sock); | |
1122 | if (ret) { | |
1123 | PERROR("close"); | |
1124 | } | |
1125 | } | |
273ea72c | 1126 | |
3bd1e081 MD |
1127 | unlink(consumer_data->err_unix_sock_path); |
1128 | unlink(consumer_data->cmd_unix_sock_path); | |
1129 | consumer_data->pid = 0; | |
1d4b027a | 1130 | |
5eb91c98 | 1131 | lttng_poll_clean(&events); |
76d7553f | 1132 | error_poll: |
139ac872 | 1133 | if (err) { |
840cb59c | 1134 | health_error(); |
139ac872 MD |
1135 | ERR("Health error occurred in %s", __func__); |
1136 | } | |
927ca06a | 1137 | health_unregister(); |
76d7553f | 1138 | DBG("consumer thread cleanup completed"); |
0177d773 | 1139 | |
5eb91c98 | 1140 | return NULL; |
099e26bd DG |
1141 | } |
1142 | ||
099e26bd DG |
1143 | /* |
1144 | * This thread manage application communication. | |
1d4b027a DG |
1145 | */ |
1146 | static void *thread_manage_apps(void *data) | |
099e26bd | 1147 | { |
139ac872 | 1148 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1149 | uint32_t revents, nb_fd; |
5eb91c98 | 1150 | struct lttng_poll_event events; |
099e26bd DG |
1151 | |
1152 | DBG("[thread] Manage application started"); | |
1153 | ||
f6a9efaa DG |
1154 | rcu_register_thread(); |
1155 | rcu_thread_online(); | |
1156 | ||
927ca06a DG |
1157 | health_register(HEALTH_TYPE_APP_MANAGE); |
1158 | ||
6993eeb3 CB |
1159 | if (testpoint(thread_manage_apps)) { |
1160 | goto error_testpoint; | |
1161 | } | |
1162 | ||
840cb59c | 1163 | health_code_update(); |
44a5e5eb | 1164 | |
d0b96690 | 1165 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1166 | if (ret < 0) { |
76d7553f | 1167 | goto error_poll_create; |
5eb91c98 | 1168 | } |
099e26bd | 1169 | |
5eb91c98 DG |
1170 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1171 | if (ret < 0) { | |
1172 | goto error; | |
1173 | } | |
099e26bd | 1174 | |
6993eeb3 CB |
1175 | if (testpoint(thread_manage_apps_before_loop)) { |
1176 | goto error; | |
1177 | } | |
8ac94142 | 1178 | |
840cb59c | 1179 | health_code_update(); |
44a5e5eb | 1180 | |
5eb91c98 | 1181 | while (1) { |
d21b0d71 | 1182 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1183 | |
1184 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1185 | restart: |
a78af745 | 1186 | health_poll_entry(); |
5eb91c98 | 1187 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1188 | health_poll_exit(); |
099e26bd | 1189 | if (ret < 0) { |
88f2b785 MD |
1190 | /* |
1191 | * Restart interrupted system call. | |
1192 | */ | |
1193 | if (errno == EINTR) { | |
1194 | goto restart; | |
1195 | } | |
099e26bd DG |
1196 | goto error; |
1197 | } | |
1198 | ||
0d9c5d77 DG |
1199 | nb_fd = ret; |
1200 | ||
5eb91c98 DG |
1201 | for (i = 0; i < nb_fd; i++) { |
1202 | /* Fetch once the poll data */ | |
1203 | revents = LTTNG_POLL_GETEV(&events, i); | |
1204 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1205 | ||
840cb59c | 1206 | health_code_update(); |
44a5e5eb | 1207 | |
5eb91c98 | 1208 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1209 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1210 | if (ret) { |
139ac872 MD |
1211 | err = 0; |
1212 | goto exit; | |
5eb91c98 | 1213 | } |
099e26bd | 1214 | |
5eb91c98 DG |
1215 | /* Inspect the apps cmd pipe */ |
1216 | if (pollfd == apps_cmd_pipe[0]) { | |
1217 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1218 | ERR("Apps command pipe error"); | |
0177d773 | 1219 | goto error; |
5eb91c98 | 1220 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1221 | int sock; |
1222 | ||
5eb91c98 | 1223 | /* Empty pipe */ |
f921c78f | 1224 | do { |
d0b96690 | 1225 | ret = read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
f921c78f | 1226 | } while (ret < 0 && errno == EINTR); |
d0b96690 | 1227 | if (ret < 0 || ret < sizeof(sock)) { |
76d7553f | 1228 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1229 | goto error; |
1230 | } | |
099e26bd | 1231 | |
840cb59c | 1232 | health_code_update(); |
44a5e5eb | 1233 | |
ffe60014 | 1234 | /* |
d0b96690 DG |
1235 | * We only monitor the error events of the socket. This |
1236 | * thread does not handle any incoming data from UST | |
1237 | * (POLLIN). | |
ffe60014 | 1238 | */ |
d0b96690 DG |
1239 | ret = lttng_poll_add(&events, sock, |
1240 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1241 | if (ret < 0) { | |
5eb91c98 | 1242 | goto error; |
e0c7ec2b | 1243 | } |
acc7b41b | 1244 | |
d0b96690 DG |
1245 | /* Set socket timeout for both receiving and ending */ |
1246 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1247 | app_socket_timeout); | |
1248 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1249 | app_socket_timeout); | |
ae9e45b3 | 1250 | |
d0b96690 | 1251 | DBG("Apps with sock %d added to poll set", sock); |
487cf67c | 1252 | |
840cb59c | 1253 | health_code_update(); |
44a5e5eb | 1254 | |
5eb91c98 | 1255 | break; |
0177d773 | 1256 | } |
5eb91c98 DG |
1257 | } else { |
1258 | /* | |
54d01ffb DG |
1259 | * At this point, we know that a registered application made |
1260 | * the event at poll_wait. | |
5eb91c98 DG |
1261 | */ |
1262 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1263 | /* Removing from the poll set */ | |
1264 | ret = lttng_poll_del(&events, pollfd); | |
1265 | if (ret < 0) { | |
1266 | goto error; | |
1267 | } | |
099e26bd | 1268 | |
b9d9b220 | 1269 | /* Socket closed on remote end. */ |
56fff090 | 1270 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1271 | break; |
1272 | } | |
099e26bd | 1273 | } |
44a5e5eb | 1274 | |
840cb59c | 1275 | health_code_update(); |
099e26bd | 1276 | } |
099e26bd DG |
1277 | } |
1278 | ||
139ac872 | 1279 | exit: |
099e26bd | 1280 | error: |
5eb91c98 | 1281 | lttng_poll_clean(&events); |
76d7553f | 1282 | error_poll_create: |
6993eeb3 | 1283 | error_testpoint: |
6620da75 DG |
1284 | utils_close_pipe(apps_cmd_pipe); |
1285 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1286 | ||
1287 | /* | |
1288 | * We don't clean the UST app hash table here since already registered | |
1289 | * applications can still be controlled so let them be until the session | |
1290 | * daemon dies or the applications stop. | |
1291 | */ | |
1292 | ||
139ac872 | 1293 | if (err) { |
840cb59c | 1294 | health_error(); |
139ac872 MD |
1295 | ERR("Health error occurred in %s", __func__); |
1296 | } | |
927ca06a | 1297 | health_unregister(); |
76d7553f | 1298 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1299 | rcu_thread_offline(); |
1300 | rcu_unregister_thread(); | |
099e26bd DG |
1301 | return NULL; |
1302 | } | |
1303 | ||
d0b96690 | 1304 | /* |
d88aee68 DG |
1305 | * Send a socket to a thread This is called from the dispatch UST registration |
1306 | * thread once all sockets are set for the application. | |
d0b96690 DG |
1307 | * |
1308 | * On success, return 0 else a negative value being the errno message of the | |
1309 | * write(). | |
1310 | */ | |
d88aee68 | 1311 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 DG |
1312 | { |
1313 | int ret; | |
1314 | ||
d0b96690 | 1315 | /* Sockets MUST be set or else this should not have been called. */ |
d88aee68 DG |
1316 | assert(fd >= 0); |
1317 | assert(sock >= 0); | |
d0b96690 DG |
1318 | |
1319 | do { | |
d88aee68 | 1320 | ret = write(fd, &sock, sizeof(sock)); |
d0b96690 | 1321 | } while (ret < 0 && errno == EINTR); |
d88aee68 DG |
1322 | if (ret < 0 || ret != sizeof(sock)) { |
1323 | PERROR("write apps pipe %d", fd); | |
d0b96690 DG |
1324 | if (ret < 0) { |
1325 | ret = -errno; | |
1326 | } | |
1327 | goto error; | |
1328 | } | |
1329 | ||
1330 | /* All good. Don't send back the write positive ret value. */ | |
1331 | ret = 0; | |
1332 | error: | |
1333 | return ret; | |
1334 | } | |
1335 | ||
099e26bd DG |
1336 | /* |
1337 | * Dispatch request from the registration threads to the application | |
1338 | * communication thread. | |
1339 | */ | |
1340 | static void *thread_dispatch_ust_registration(void *data) | |
1341 | { | |
1342 | int ret; | |
1343 | struct cds_wfq_node *node; | |
1344 | struct ust_command *ust_cmd = NULL; | |
d0b96690 DG |
1345 | struct { |
1346 | struct ust_app *app; | |
1347 | struct cds_list_head head; | |
d88aee68 | 1348 | } *wait_node = NULL, *tmp_wait_node; |
d0b96690 DG |
1349 | |
1350 | CDS_LIST_HEAD(wait_queue); | |
099e26bd DG |
1351 | |
1352 | DBG("[thread] Dispatch UST command started"); | |
1353 | ||
26c9d55e | 1354 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1355 | /* Atomically prepare the queue futex */ |
1356 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1357 | ||
1358 | do { | |
d0b96690 | 1359 | struct ust_app *app = NULL; |
7972aab2 | 1360 | ust_cmd = NULL; |
d0b96690 | 1361 | |
099e26bd DG |
1362 | /* Dequeue command for registration */ |
1363 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1364 | if (node == NULL) { | |
00a17c97 | 1365 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1366 | /* Continue thread execution */ |
1367 | break; | |
1368 | } | |
1369 | ||
1370 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1371 | ||
2f50c8a3 DG |
1372 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1373 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1374 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1375 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1376 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1377 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1378 | |
1379 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1380 | wait_node = zmalloc(sizeof(*wait_node)); | |
1381 | if (!wait_node) { | |
1382 | PERROR("zmalloc wait_node dispatch"); | |
7972aab2 | 1383 | free(ust_cmd); |
d0b96690 DG |
1384 | goto error; |
1385 | } | |
1386 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1387 | ||
1388 | /* Create application object if socket is CMD. */ | |
1389 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1390 | ust_cmd->sock); | |
1391 | if (!wait_node->app) { | |
1392 | ret = close(ust_cmd->sock); | |
1393 | if (ret < 0) { | |
1394 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1395 | } |
d88aee68 DG |
1396 | lttng_fd_put(1, LTTNG_FD_APPS); |
1397 | free(wait_node); | |
7972aab2 | 1398 | free(ust_cmd); |
d0b96690 DG |
1399 | continue; |
1400 | } | |
1401 | /* | |
1402 | * Add application to the wait queue so we can set the notify | |
1403 | * socket before putting this object in the global ht. | |
1404 | */ | |
1405 | cds_list_add(&wait_node->head, &wait_queue); | |
1406 | ||
7972aab2 | 1407 | free(ust_cmd); |
d0b96690 DG |
1408 | /* |
1409 | * We have to continue here since we don't have the notify | |
1410 | * socket and the application MUST be added to the hash table | |
1411 | * only at that moment. | |
1412 | */ | |
1413 | continue; | |
1414 | } else { | |
1415 | /* | |
1416 | * Look for the application in the local wait queue and set the | |
1417 | * notify socket if found. | |
1418 | */ | |
d88aee68 DG |
1419 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1420 | &wait_queue, head) { | |
d0b96690 DG |
1421 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1422 | wait_node->app->notify_sock = ust_cmd->sock; | |
1423 | cds_list_del(&wait_node->head); | |
1424 | app = wait_node->app; | |
1425 | free(wait_node); | |
1426 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1427 | break; | |
1428 | } | |
1429 | } | |
7972aab2 | 1430 | free(ust_cmd); |
d0b96690 DG |
1431 | } |
1432 | ||
1433 | if (app) { | |
d0b96690 DG |
1434 | /* |
1435 | * @session_lock_list | |
1436 | * | |
1437 | * Lock the global session list so from the register up to the | |
1438 | * registration done message, no thread can see the application | |
1439 | * and change its state. | |
1440 | */ | |
1441 | session_lock_list(); | |
1442 | rcu_read_lock(); | |
d88aee68 | 1443 | |
d0b96690 DG |
1444 | /* |
1445 | * Add application to the global hash table. This needs to be | |
1446 | * done before the update to the UST registry can locate the | |
1447 | * application. | |
1448 | */ | |
1449 | ust_app_add(app); | |
d88aee68 DG |
1450 | |
1451 | /* Set app version. This call will print an error if needed. */ | |
1452 | (void) ust_app_version(app); | |
1453 | ||
1454 | /* Send notify socket through the notify pipe. */ | |
1455 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1456 | app->notify_sock); | |
1457 | if (ret < 0) { | |
1458 | rcu_read_unlock(); | |
1459 | session_unlock_list(); | |
1460 | /* No notify thread, stop the UST tracing. */ | |
1461 | goto error; | |
6620da75 | 1462 | } |
d88aee68 | 1463 | |
d0b96690 DG |
1464 | /* |
1465 | * Update newly registered application with the tracing | |
1466 | * registry info already enabled information. | |
1467 | */ | |
1468 | update_ust_app(app->sock); | |
d88aee68 DG |
1469 | |
1470 | /* | |
1471 | * Don't care about return value. Let the manage apps threads | |
1472 | * handle app unregistration upon socket close. | |
1473 | */ | |
1474 | (void) ust_app_register_done(app->sock); | |
1475 | ||
1476 | /* | |
1477 | * Even if the application socket has been closed, send the app | |
1478 | * to the thread and unregistration will take place at that | |
1479 | * place. | |
1480 | */ | |
1481 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1482 | if (ret < 0) { |
d88aee68 DG |
1483 | rcu_read_unlock(); |
1484 | session_unlock_list(); | |
1485 | /* No apps. thread, stop the UST tracing. */ | |
1486 | goto error; | |
d0b96690 | 1487 | } |
d88aee68 | 1488 | |
d0b96690 DG |
1489 | rcu_read_unlock(); |
1490 | session_unlock_list(); | |
6620da75 | 1491 | } else { |
d0b96690 | 1492 | /* Application manager threads are not available. */ |
6620da75 DG |
1493 | ret = close(ust_cmd->sock); |
1494 | if (ret < 0) { | |
1495 | PERROR("close ust_cmd sock"); | |
099e26bd | 1496 | } |
d88aee68 | 1497 | lttng_fd_put(1, LTTNG_FD_APPS); |
099e26bd | 1498 | } |
099e26bd DG |
1499 | } while (node != NULL); |
1500 | ||
1501 | /* Futex wait on queue. Blocking call on futex() */ | |
1502 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1503 | } | |
1504 | ||
1505 | error: | |
d88aee68 DG |
1506 | /* Clean up wait queue. */ |
1507 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1508 | &wait_queue, head) { | |
1509 | cds_list_del(&wait_node->head); | |
1510 | free(wait_node); | |
1511 | } | |
1512 | ||
099e26bd DG |
1513 | DBG("Dispatch thread dying"); |
1514 | return NULL; | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * This thread manage application registration. | |
1519 | */ | |
1520 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1521 | { |
139ac872 | 1522 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1523 | uint32_t revents, nb_fd; |
1524 | struct lttng_poll_event events; | |
099e26bd DG |
1525 | /* |
1526 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1527 | * freed in the manage apps thread. | |
1528 | */ | |
1529 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1530 | |
099e26bd | 1531 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1532 | |
927ca06a DG |
1533 | health_register(HEALTH_TYPE_APP_REG); |
1534 | ||
6993eeb3 CB |
1535 | if (testpoint(thread_registration_apps)) { |
1536 | goto error_testpoint; | |
1537 | } | |
8ac94142 | 1538 | |
1d4b027a DG |
1539 | ret = lttcomm_listen_unix_sock(apps_sock); |
1540 | if (ret < 0) { | |
76d7553f | 1541 | goto error_listen; |
1d4b027a DG |
1542 | } |
1543 | ||
5eb91c98 DG |
1544 | /* |
1545 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1546 | * more will be added to this poll set. | |
1547 | */ | |
d0b96690 | 1548 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1549 | if (ret < 0) { |
76d7553f | 1550 | goto error_create_poll; |
5eb91c98 | 1551 | } |
273ea72c | 1552 | |
5eb91c98 DG |
1553 | /* Add the application registration socket */ |
1554 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1555 | if (ret < 0) { | |
76d7553f | 1556 | goto error_poll_add; |
5eb91c98 | 1557 | } |
273ea72c | 1558 | |
1d4b027a | 1559 | /* Notify all applications to register */ |
0fdd1e2c DG |
1560 | ret = notify_ust_apps(1); |
1561 | if (ret < 0) { | |
1562 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1563 | "Execution continues but there might be problem for already\n" |
1564 | "running applications that wishes to register."); | |
0fdd1e2c | 1565 | } |
1d4b027a DG |
1566 | |
1567 | while (1) { | |
1568 | DBG("Accepting application registration"); | |
273ea72c DG |
1569 | |
1570 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1571 | restart: |
a78af745 | 1572 | health_poll_entry(); |
5eb91c98 | 1573 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1574 | health_poll_exit(); |
273ea72c | 1575 | if (ret < 0) { |
88f2b785 MD |
1576 | /* |
1577 | * Restart interrupted system call. | |
1578 | */ | |
1579 | if (errno == EINTR) { | |
1580 | goto restart; | |
1581 | } | |
273ea72c DG |
1582 | goto error; |
1583 | } | |
1584 | ||
0d9c5d77 DG |
1585 | nb_fd = ret; |
1586 | ||
5eb91c98 | 1587 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1588 | health_code_update(); |
139ac872 | 1589 | |
5eb91c98 DG |
1590 | /* Fetch once the poll data */ |
1591 | revents = LTTNG_POLL_GETEV(&events, i); | |
1592 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1593 | |
5eb91c98 | 1594 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1595 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1596 | if (ret) { |
139ac872 MD |
1597 | err = 0; |
1598 | goto exit; | |
90014c57 | 1599 | } |
1d4b027a | 1600 | |
5eb91c98 DG |
1601 | /* Event on the registration socket */ |
1602 | if (pollfd == apps_sock) { | |
1603 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1604 | ERR("Register apps socket poll error"); | |
1605 | goto error; | |
1606 | } else if (revents & LPOLLIN) { | |
1607 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1608 | if (sock < 0) { | |
1609 | goto error; | |
1610 | } | |
099e26bd | 1611 | |
b662582b DG |
1612 | /* |
1613 | * Set the CLOEXEC flag. Return code is useless because | |
1614 | * either way, the show must go on. | |
1615 | */ | |
1616 | (void) utils_set_fd_cloexec(sock); | |
1617 | ||
5eb91c98 | 1618 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1619 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1620 | if (ust_cmd == NULL) { |
76d7553f | 1621 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1622 | goto error; |
1623 | } | |
1d4b027a | 1624 | |
5eb91c98 DG |
1625 | /* |
1626 | * Using message-based transmissions to ensure we don't | |
1627 | * have to deal with partially received messages. | |
1628 | */ | |
4063050c MD |
1629 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1630 | if (ret < 0) { | |
1631 | ERR("Exhausted file descriptors allowed for applications."); | |
1632 | free(ust_cmd); | |
1633 | ret = close(sock); | |
1634 | if (ret) { | |
1635 | PERROR("close"); | |
1636 | } | |
1637 | sock = -1; | |
1638 | continue; | |
1639 | } | |
d88aee68 | 1640 | |
840cb59c | 1641 | health_code_update(); |
d0b96690 DG |
1642 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1643 | if (ret < 0) { | |
5eb91c98 | 1644 | free(ust_cmd); |
d0b96690 | 1645 | /* Close socket of the application. */ |
76d7553f MD |
1646 | ret = close(sock); |
1647 | if (ret) { | |
1648 | PERROR("close"); | |
1649 | } | |
4063050c | 1650 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1651 | sock = -1; |
5eb91c98 DG |
1652 | continue; |
1653 | } | |
840cb59c | 1654 | health_code_update(); |
099e26bd | 1655 | |
5eb91c98 | 1656 | ust_cmd->sock = sock; |
34a2494f | 1657 | sock = -1; |
099e26bd | 1658 | |
5eb91c98 DG |
1659 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1660 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1661 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1662 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1663 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1664 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1665 | |
5eb91c98 DG |
1666 | /* |
1667 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1668 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1669 | */ |
1670 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1671 | ||
1672 | /* | |
1673 | * Wake the registration queue futex. Implicit memory | |
1674 | * barrier with the exchange in cds_wfq_enqueue. | |
1675 | */ | |
1676 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1677 | } | |
1678 | } | |
90014c57 | 1679 | } |
1d4b027a DG |
1680 | } |
1681 | ||
139ac872 | 1682 | exit: |
1d4b027a | 1683 | error: |
139ac872 | 1684 | if (err) { |
840cb59c | 1685 | health_error(); |
139ac872 MD |
1686 | ERR("Health error occurred in %s", __func__); |
1687 | } | |
139ac872 | 1688 | |
0fdd1e2c DG |
1689 | /* Notify that the registration thread is gone */ |
1690 | notify_ust_apps(0); | |
1691 | ||
a4b35e07 | 1692 | if (apps_sock >= 0) { |
76d7553f MD |
1693 | ret = close(apps_sock); |
1694 | if (ret) { | |
1695 | PERROR("close"); | |
1696 | } | |
a4b35e07 | 1697 | } |
46c3f085 | 1698 | if (sock >= 0) { |
76d7553f MD |
1699 | ret = close(sock); |
1700 | if (ret) { | |
1701 | PERROR("close"); | |
1702 | } | |
4063050c | 1703 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1704 | } |
273ea72c | 1705 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1706 | |
76d7553f | 1707 | error_poll_add: |
5eb91c98 | 1708 | lttng_poll_clean(&events); |
76d7553f MD |
1709 | error_listen: |
1710 | error_create_poll: | |
6993eeb3 | 1711 | error_testpoint: |
76d7553f | 1712 | DBG("UST Registration thread cleanup complete"); |
927ca06a | 1713 | health_unregister(); |
5eb91c98 | 1714 | |
1d4b027a DG |
1715 | return NULL; |
1716 | } | |
1717 | ||
8c0faa1d | 1718 | /* |
3bd1e081 | 1719 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1720 | * exec or it will fails. |
8c0faa1d | 1721 | */ |
3bd1e081 | 1722 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1723 | { |
a23ec3a7 | 1724 | int ret, clock_ret; |
ee0b0061 DG |
1725 | struct timespec timeout; |
1726 | ||
a23ec3a7 DG |
1727 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1728 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1729 | |
a23ec3a7 DG |
1730 | /* Setup pthread condition */ |
1731 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1732 | if (ret != 0) { | |
1733 | errno = ret; | |
1734 | PERROR("pthread_condattr_init consumer data"); | |
1735 | goto error; | |
1736 | } | |
1737 | ||
1738 | /* | |
1739 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1740 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1741 | * for a more details and how we noticed it. | |
1742 | */ | |
1743 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1744 | if (ret != 0) { | |
1745 | errno = ret; | |
1746 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1747 | goto error; |
1748 | } | |
8c0faa1d | 1749 | |
a23ec3a7 DG |
1750 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1751 | if (ret != 0) { | |
1752 | errno = ret; | |
1753 | PERROR("pthread_cond_init consumer data"); | |
1754 | goto error; | |
1755 | } | |
1756 | ||
1757 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1758 | consumer_data); | |
8c0faa1d | 1759 | if (ret != 0) { |
3bd1e081 | 1760 | PERROR("pthread_create consumer"); |
ee0b0061 | 1761 | ret = -1; |
8c0faa1d DG |
1762 | goto error; |
1763 | } | |
1764 | ||
a23ec3a7 DG |
1765 | /* We are about to wait on a pthread condition */ |
1766 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1767 | ||
ee0b0061 | 1768 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1769 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1770 | /* | |
1771 | * Set the timeout for the condition timed wait even if the clock gettime | |
1772 | * call fails since we might loop on that call and we want to avoid to | |
1773 | * increment the timeout too many times. | |
1774 | */ | |
1775 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1776 | ||
1777 | /* | |
1778 | * The following loop COULD be skipped in some conditions so this is why we | |
1779 | * set ret to 0 in order to make sure at least one round of the loop is | |
1780 | * done. | |
1781 | */ | |
1782 | ret = 0; | |
1783 | ||
1784 | /* | |
1785 | * Loop until the condition is reached or when a timeout is reached. Note | |
1786 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1787 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1788 | * possible. This loop does not take any chances and works with both of | |
1789 | * them. | |
1790 | */ | |
1791 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1792 | if (clock_ret < 0) { | |
1793 | PERROR("clock_gettime spawn consumer"); | |
1794 | /* Infinite wait for the consumerd thread to be ready */ | |
1795 | ret = pthread_cond_wait(&consumer_data->cond, | |
1796 | &consumer_data->cond_mutex); | |
1797 | } else { | |
1798 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1799 | &consumer_data->cond_mutex, &timeout); | |
1800 | } | |
ee0b0061 | 1801 | } |
8c0faa1d | 1802 | |
a23ec3a7 DG |
1803 | /* Release the pthread condition */ |
1804 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1805 | ||
1806 | if (ret != 0) { | |
1807 | errno = ret; | |
1808 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1809 | /* |
1810 | * Call has timed out so we kill the kconsumerd_thread and return | |
1811 | * an error. | |
1812 | */ | |
a23ec3a7 DG |
1813 | ERR("Condition timed out. The consumer thread was never ready." |
1814 | " Killing it"); | |
3bd1e081 | 1815 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1816 | if (ret < 0) { |
3bd1e081 | 1817 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1818 | } |
1819 | } else { | |
a23ec3a7 | 1820 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1821 | } |
1822 | goto error; | |
1823 | } | |
1824 | ||
3bd1e081 MD |
1825 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1826 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1827 | ERR("Consumerd did not start"); |
3bd1e081 | 1828 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1829 | goto error; |
1830 | } | |
3bd1e081 | 1831 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1832 | |
8c0faa1d DG |
1833 | return 0; |
1834 | ||
1835 | error: | |
1836 | return ret; | |
1837 | } | |
1838 | ||
d9800920 | 1839 | /* |
3bd1e081 | 1840 | * Join consumer thread |
d9800920 | 1841 | */ |
3bd1e081 | 1842 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1843 | { |
1844 | void *status; | |
cf3af59e | 1845 | |
e8209f6b DG |
1846 | /* Consumer pid must be a real one. */ |
1847 | if (consumer_data->pid > 0) { | |
c617c0c6 | 1848 | int ret; |
3bd1e081 | 1849 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1850 | if (ret) { |
3bd1e081 | 1851 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1852 | return ret; |
1853 | } | |
3bd1e081 | 1854 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1855 | } else { |
1856 | return 0; | |
1857 | } | |
1858 | } | |
1859 | ||
8c0faa1d | 1860 | /* |
3bd1e081 | 1861 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1862 | * |
d063d709 | 1863 | * Return pid if successful else -1. |
8c0faa1d | 1864 | */ |
3bd1e081 | 1865 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1866 | { |
1867 | int ret; | |
1868 | pid_t pid; | |
94c55f17 | 1869 | const char *consumer_to_use; |
53086306 | 1870 | const char *verbosity; |
94c55f17 | 1871 | struct stat st; |
8c0faa1d | 1872 | |
3bd1e081 | 1873 | DBG("Spawning consumerd"); |
c49dc785 | 1874 | |
8c0faa1d DG |
1875 | pid = fork(); |
1876 | if (pid == 0) { | |
1877 | /* | |
3bd1e081 | 1878 | * Exec consumerd. |
8c0faa1d | 1879 | */ |
daee5345 | 1880 | if (opt_verbose_consumer) { |
53086306 DG |
1881 | verbosity = "--verbose"; |
1882 | } else { | |
1883 | verbosity = "--quiet"; | |
1884 | } | |
3bd1e081 MD |
1885 | switch (consumer_data->type) { |
1886 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1887 | /* |
c7704d57 DG |
1888 | * Find out which consumerd to execute. We will first try the |
1889 | * 64-bit path, then the sessiond's installation directory, and | |
1890 | * fallback on the 32-bit one, | |
94c55f17 | 1891 | */ |
63a799e8 AM |
1892 | DBG3("Looking for a kernel consumer at these locations:"); |
1893 | DBG3(" 1) %s", consumerd64_bin); | |
1894 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1895 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1896 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1897 | DBG3("Found location #1"); |
94c55f17 | 1898 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1899 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1900 | DBG3("Found location #2"); |
94c55f17 | 1901 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1902 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1903 | DBG3("Found location #3"); |
eb1e0bd4 | 1904 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1905 | } else { |
63a799e8 | 1906 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1907 | break; |
1908 | } | |
1909 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1910 | execl(consumer_to_use, | |
1911 | "lttng-consumerd", verbosity, "-k", | |
1912 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1913 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1914 | NULL); | |
3bd1e081 | 1915 | break; |
7753dea8 MD |
1916 | case LTTNG_CONSUMER64_UST: |
1917 | { | |
b1e0b6b6 | 1918 | char *tmpnew = NULL; |
8f4905da MD |
1919 | |
1920 | if (consumerd64_libdir[0] != '\0') { | |
1921 | char *tmp; | |
1922 | size_t tmplen; | |
1923 | ||
1924 | tmp = getenv("LD_LIBRARY_PATH"); | |
1925 | if (!tmp) { | |
1926 | tmp = ""; | |
1927 | } | |
1928 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1929 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1930 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1931 | if (!tmpnew) { | |
1932 | ret = -ENOMEM; | |
1933 | goto error; | |
1934 | } | |
1935 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1936 | strcat(tmpnew, consumerd64_libdir); | |
1937 | if (tmp[0] != '\0') { | |
1938 | strcat(tmpnew, ":"); | |
1939 | strcat(tmpnew, tmp); | |
1940 | } | |
1941 | ret = putenv(tmpnew); | |
1942 | if (ret) { | |
1943 | ret = -errno; | |
c6f76da9 | 1944 | free(tmpnew); |
8f4905da MD |
1945 | goto error; |
1946 | } | |
1947 | } | |
94c55f17 | 1948 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1949 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1950 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1951 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1952 | NULL); | |
8f4905da MD |
1953 | if (consumerd64_libdir[0] != '\0') { |
1954 | free(tmpnew); | |
1955 | } | |
1956 | if (ret) { | |
1957 | goto error; | |
1958 | } | |
3bd1e081 | 1959 | break; |
7753dea8 MD |
1960 | } |
1961 | case LTTNG_CONSUMER32_UST: | |
1962 | { | |
937dde8e | 1963 | char *tmpnew = NULL; |
8f4905da MD |
1964 | |
1965 | if (consumerd32_libdir[0] != '\0') { | |
1966 | char *tmp; | |
1967 | size_t tmplen; | |
1968 | ||
1969 | tmp = getenv("LD_LIBRARY_PATH"); | |
1970 | if (!tmp) { | |
1971 | tmp = ""; | |
1972 | } | |
1973 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1974 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1975 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1976 | if (!tmpnew) { | |
1977 | ret = -ENOMEM; | |
1978 | goto error; | |
1979 | } | |
1980 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1981 | strcat(tmpnew, consumerd32_libdir); | |
1982 | if (tmp[0] != '\0') { | |
1983 | strcat(tmpnew, ":"); | |
1984 | strcat(tmpnew, tmp); | |
1985 | } | |
1986 | ret = putenv(tmpnew); | |
1987 | if (ret) { | |
1988 | ret = -errno; | |
c6f76da9 | 1989 | free(tmpnew); |
8f4905da MD |
1990 | goto error; |
1991 | } | |
1992 | } | |
94c55f17 | 1993 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1994 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1995 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1996 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1997 | NULL); | |
8f4905da MD |
1998 | if (consumerd32_libdir[0] != '\0') { |
1999 | free(tmpnew); | |
2000 | } | |
2001 | if (ret) { | |
2002 | goto error; | |
2003 | } | |
7753dea8 MD |
2004 | break; |
2005 | } | |
3bd1e081 | 2006 | default: |
76d7553f | 2007 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2008 | exit(EXIT_FAILURE); |
2009 | } | |
8c0faa1d | 2010 | if (errno != 0) { |
76d7553f | 2011 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2012 | } |
2013 | exit(EXIT_FAILURE); | |
2014 | } else if (pid > 0) { | |
2015 | ret = pid; | |
8c0faa1d | 2016 | } else { |
76d7553f | 2017 | PERROR("start consumer fork"); |
8c0faa1d | 2018 | ret = -errno; |
8c0faa1d | 2019 | } |
8f4905da | 2020 | error: |
8c0faa1d DG |
2021 | return ret; |
2022 | } | |
2023 | ||
693bd40b | 2024 | /* |
3bd1e081 | 2025 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2026 | */ |
3bd1e081 | 2027 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2028 | { |
c617c0c6 | 2029 | int ret; |
edb8b045 DG |
2030 | |
2031 | /* | |
2032 | * Set the listen() state on the socket since there is a possible race | |
2033 | * between the exec() of the consumer daemon and this call if place in the | |
2034 | * consumer thread. See bug #366 for more details. | |
2035 | */ | |
2036 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2037 | if (ret < 0) { | |
2038 | goto error; | |
2039 | } | |
693bd40b | 2040 | |
3bd1e081 MD |
2041 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2042 | if (consumer_data->pid != 0) { | |
2043 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2044 | goto end; |
2045 | } | |
693bd40b | 2046 | |
3bd1e081 | 2047 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2048 | if (ret < 0) { |
3bd1e081 MD |
2049 | ERR("Spawning consumerd failed"); |
2050 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2051 | goto error; |
693bd40b | 2052 | } |
c49dc785 | 2053 | |
3bd1e081 MD |
2054 | /* Setting up the consumer_data pid */ |
2055 | consumer_data->pid = ret; | |
48842b30 | 2056 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2057 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2058 | |
3bd1e081 MD |
2059 | DBG2("Spawning consumer control thread"); |
2060 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2061 | if (ret < 0) { |
3bd1e081 | 2062 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2063 | goto error; |
2064 | } | |
2065 | ||
c49dc785 | 2066 | end: |
693bd40b DG |
2067 | return 0; |
2068 | ||
2069 | error: | |
331744e3 | 2070 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2071 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2072 | int err; |
2073 | ||
edb8b045 DG |
2074 | err = close(consumer_data->err_sock); |
2075 | if (err < 0) { | |
2076 | PERROR("close consumer data error socket"); | |
2077 | } | |
2078 | } | |
693bd40b DG |
2079 | return ret; |
2080 | } | |
2081 | ||
44a5e5eb | 2082 | /* |
139ac872 MD |
2083 | * Compute health status of each consumer. If one of them is zero (bad |
2084 | * state), we return 0. | |
44a5e5eb DG |
2085 | */ |
2086 | static int check_consumer_health(void) | |
2087 | { | |
2088 | int ret; | |
2089 | ||
927ca06a | 2090 | ret = health_check_state(HEALTH_TYPE_CONSUMER); |
44a5e5eb DG |
2091 | |
2092 | DBG3("Health consumer check %d", ret); | |
2093 | ||
2094 | return ret; | |
2095 | } | |
2096 | ||
b73401da | 2097 | /* |
096102bd | 2098 | * Setup necessary data for kernel tracer action. |
b73401da | 2099 | */ |
096102bd | 2100 | static int init_kernel_tracer(void) |
b73401da DG |
2101 | { |
2102 | int ret; | |
b73401da | 2103 | |
096102bd DG |
2104 | /* Modprobe lttng kernel modules */ |
2105 | ret = modprobe_lttng_control(); | |
b73401da | 2106 | if (ret < 0) { |
b73401da DG |
2107 | goto error; |
2108 | } | |
2109 | ||
096102bd DG |
2110 | /* Open debugfs lttng */ |
2111 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2112 | if (kernel_tracer_fd < 0) { | |
2113 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2114 | ret = -1; |
2115 | goto error_open; | |
54d01ffb DG |
2116 | } |
2117 | ||
2f77fc4b DG |
2118 | /* Validate kernel version */ |
2119 | ret = kernel_validate_version(kernel_tracer_fd); | |
2120 | if (ret < 0) { | |
2121 | goto error_version; | |
b551a063 | 2122 | } |
54d01ffb | 2123 | |
2f77fc4b DG |
2124 | ret = modprobe_lttng_data(); |
2125 | if (ret < 0) { | |
2126 | goto error_modules; | |
54d01ffb DG |
2127 | } |
2128 | ||
2f77fc4b DG |
2129 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2130 | return 0; | |
2131 | ||
2132 | error_version: | |
2133 | modprobe_remove_lttng_control(); | |
2134 | ret = close(kernel_tracer_fd); | |
2135 | if (ret) { | |
2136 | PERROR("close"); | |
b551a063 | 2137 | } |
2f77fc4b | 2138 | kernel_tracer_fd = -1; |
f73fabfd | 2139 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2140 | |
2f77fc4b DG |
2141 | error_modules: |
2142 | ret = close(kernel_tracer_fd); | |
2143 | if (ret) { | |
2144 | PERROR("close"); | |
b551a063 | 2145 | } |
54d01ffb | 2146 | |
2f77fc4b DG |
2147 | error_open: |
2148 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2149 | |
2150 | error: | |
2f77fc4b DG |
2151 | WARN("No kernel tracer available"); |
2152 | kernel_tracer_fd = -1; | |
2153 | if (!is_root) { | |
f73fabfd | 2154 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2155 | } else { |
f73fabfd | 2156 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2157 | } |
54d01ffb DG |
2158 | } |
2159 | ||
2f77fc4b | 2160 | |
54d01ffb | 2161 | /* |
2f77fc4b DG |
2162 | * Copy consumer output from the tracing session to the domain session. The |
2163 | * function also applies the right modification on a per domain basis for the | |
2164 | * trace files destination directory. | |
36b588ed MD |
2165 | * |
2166 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2167 | */ |
2f77fc4b | 2168 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2169 | { |
2170 | int ret; | |
2f77fc4b DG |
2171 | const char *dir_name; |
2172 | struct consumer_output *consumer; | |
2173 | ||
2174 | assert(session); | |
2175 | assert(session->consumer); | |
54d01ffb | 2176 | |
b551a063 DG |
2177 | switch (domain) { |
2178 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2179 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2180 | /* |
2181 | * XXX: We should audit the session creation and what this function | |
2182 | * does "extra" in order to avoid a destroy since this function is used | |
2183 | * in the domain session creation (kernel and ust) only. Same for UST | |
2184 | * domain. | |
2185 | */ | |
2186 | if (session->kernel_session->consumer) { | |
2187 | consumer_destroy_output(session->kernel_session->consumer); | |
2188 | } | |
2f77fc4b DG |
2189 | session->kernel_session->consumer = |
2190 | consumer_copy_output(session->consumer); | |
2191 | /* Ease our life a bit for the next part */ | |
2192 | consumer = session->kernel_session->consumer; | |
2193 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2194 | break; |
2195 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2196 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2197 | if (session->ust_session->consumer) { |
2198 | consumer_destroy_output(session->ust_session->consumer); | |
2199 | } | |
2f77fc4b DG |
2200 | session->ust_session->consumer = |
2201 | consumer_copy_output(session->consumer); | |
2202 | /* Ease our life a bit for the next part */ | |
2203 | consumer = session->ust_session->consumer; | |
2204 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2205 | break; |
2206 | default: | |
f73fabfd | 2207 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2208 | goto error; |
2209 | } | |
2210 | ||
2f77fc4b | 2211 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2212 | strncat(consumer->subdir, dir_name, |
2213 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2214 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2215 | ||
f73fabfd | 2216 | ret = LTTNG_OK; |
54d01ffb DG |
2217 | |
2218 | error: | |
2219 | return ret; | |
2220 | } | |
2221 | ||
00e2e675 | 2222 | /* |
2f77fc4b | 2223 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2224 | * |
2225 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2226 | */ |
2f77fc4b DG |
2227 | static int create_ust_session(struct ltt_session *session, |
2228 | struct lttng_domain *domain) | |
00e2e675 DG |
2229 | { |
2230 | int ret; | |
2f77fc4b | 2231 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2232 | |
a4b92340 | 2233 | assert(session); |
2f77fc4b DG |
2234 | assert(domain); |
2235 | assert(session->consumer); | |
a4b92340 | 2236 | |
2f77fc4b DG |
2237 | switch (domain->type) { |
2238 | case LTTNG_DOMAIN_UST: | |
2239 | break; | |
2240 | default: | |
2241 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2242 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2243 | goto error; |
2244 | } | |
2245 | ||
2f77fc4b DG |
2246 | DBG("Creating UST session"); |
2247 | ||
dec56f6c | 2248 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2249 | if (lus == NULL) { |
f73fabfd | 2250 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2251 | goto error; |
2252 | } | |
2253 | ||
2f77fc4b DG |
2254 | lus->uid = session->uid; |
2255 | lus->gid = session->gid; | |
2256 | session->ust_session = lus; | |
00e2e675 | 2257 | |
2f77fc4b DG |
2258 | /* Copy session output to the newly created UST session */ |
2259 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2260 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2261 | goto error; |
2262 | } | |
2263 | ||
f73fabfd | 2264 | return LTTNG_OK; |
00e2e675 DG |
2265 | |
2266 | error: | |
2f77fc4b DG |
2267 | free(lus); |
2268 | session->ust_session = NULL; | |
00e2e675 DG |
2269 | return ret; |
2270 | } | |
2271 | ||
2272 | /* | |
2f77fc4b | 2273 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2274 | */ |
2f77fc4b | 2275 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2276 | { |
2277 | int ret; | |
a4b92340 | 2278 | |
2f77fc4b | 2279 | DBG("Creating kernel session"); |
00e2e675 | 2280 | |
2f77fc4b DG |
2281 | ret = kernel_create_session(session, kernel_tracer_fd); |
2282 | if (ret < 0) { | |
f73fabfd | 2283 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2284 | goto error; |
2285 | } | |
2286 | ||
2f77fc4b DG |
2287 | /* Code flow safety */ |
2288 | assert(session->kernel_session); | |
2289 | ||
2290 | /* Copy session output to the newly created Kernel session */ | |
2291 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2292 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2293 | goto error; |
2294 | } | |
2295 | ||
2f77fc4b DG |
2296 | /* Create directory(ies) on local filesystem. */ |
2297 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2298 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2299 | ret = run_as_mkdir_recursive( | |
2300 | session->kernel_session->consumer->dst.trace_path, | |
2301 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2302 | if (ret < 0) { | |
2303 | if (ret != -EEXIST) { | |
2304 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2305 | goto error; |
2306 | } | |
00e2e675 | 2307 | } |
2f77fc4b | 2308 | } |
00e2e675 | 2309 | |
2f77fc4b DG |
2310 | session->kernel_session->uid = session->uid; |
2311 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2312 | |
f73fabfd | 2313 | return LTTNG_OK; |
00e2e675 | 2314 | |
2f77fc4b DG |
2315 | error: |
2316 | trace_kernel_destroy_session(session->kernel_session); | |
2317 | session->kernel_session = NULL; | |
2318 | return ret; | |
2319 | } | |
00e2e675 | 2320 | |
2f77fc4b DG |
2321 | /* |
2322 | * Count number of session permitted by uid/gid. | |
2323 | */ | |
2324 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2325 | { | |
2326 | unsigned int i = 0; | |
2327 | struct ltt_session *session; | |
07424f16 | 2328 | |
2f77fc4b DG |
2329 | DBG("Counting number of available session for UID %d GID %d", |
2330 | uid, gid); | |
2331 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2332 | /* |
2f77fc4b | 2333 | * Only list the sessions the user can control. |
00e2e675 | 2334 | */ |
2f77fc4b DG |
2335 | if (!session_access_ok(session, uid, gid)) { |
2336 | continue; | |
2337 | } | |
2338 | i++; | |
a4b92340 | 2339 | } |
2f77fc4b | 2340 | return i; |
00e2e675 DG |
2341 | } |
2342 | ||
54d01ffb DG |
2343 | /* |
2344 | * Process the command requested by the lttng client within the command | |
2345 | * context structure. This function make sure that the return structure (llm) | |
2346 | * is set and ready for transmission before returning. | |
2347 | * | |
2348 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2349 | * |
2350 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2351 | * |
2352 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2353 | */ |
53a80697 MD |
2354 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2355 | int *sock_error) | |
54d01ffb | 2356 | { |
f73fabfd | 2357 | int ret = LTTNG_OK; |
44d3bd01 | 2358 | int need_tracing_session = 1; |
2e09ba09 | 2359 | int need_domain; |
54d01ffb DG |
2360 | |
2361 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2362 | ||
53a80697 MD |
2363 | *sock_error = 0; |
2364 | ||
2e09ba09 MD |
2365 | switch (cmd_ctx->lsm->cmd_type) { |
2366 | case LTTNG_CREATE_SESSION: | |
2367 | case LTTNG_DESTROY_SESSION: | |
2368 | case LTTNG_LIST_SESSIONS: | |
2369 | case LTTNG_LIST_DOMAINS: | |
2370 | case LTTNG_START_TRACE: | |
2371 | case LTTNG_STOP_TRACE: | |
6d805429 | 2372 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2373 | need_domain = 0; |
3aace903 | 2374 | break; |
2e09ba09 MD |
2375 | default: |
2376 | need_domain = 1; | |
2377 | } | |
2378 | ||
2379 | if (opt_no_kernel && need_domain | |
2380 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2381 | if (!is_root) { |
f73fabfd | 2382 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2383 | } else { |
f73fabfd | 2384 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2385 | } |
4fba7219 DG |
2386 | goto error; |
2387 | } | |
2388 | ||
8d3113b2 DG |
2389 | /* Deny register consumer if we already have a spawned consumer. */ |
2390 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2391 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2392 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2393 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2394 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2395 | goto error; |
2396 | } | |
2397 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2398 | } | |
2399 | ||
54d01ffb DG |
2400 | /* |
2401 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2402 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2403 | * command. |
2404 | */ | |
2405 | switch(cmd_ctx->lsm->cmd_type) { | |
2406 | case LTTNG_LIST_SESSIONS: | |
2407 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2408 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2409 | case LTTNG_LIST_DOMAINS: |
2410 | case LTTNG_LIST_CHANNELS: | |
2411 | case LTTNG_LIST_EVENTS: | |
2412 | break; | |
2413 | default: | |
2414 | /* Setup lttng message with no payload */ | |
2415 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2416 | if (ret < 0) { | |
2417 | /* This label does not try to unlock the session */ | |
2418 | goto init_setup_error; | |
2419 | } | |
2420 | } | |
2421 | ||
2422 | /* Commands that DO NOT need a session. */ | |
2423 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2424 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2425 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2426 | case LTTNG_LIST_SESSIONS: |
2427 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2428 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2429 | need_tracing_session = 0; |
54d01ffb DG |
2430 | break; |
2431 | default: | |
2432 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2433 | /* |
2434 | * We keep the session list lock across _all_ commands | |
2435 | * for now, because the per-session lock does not | |
2436 | * handle teardown properly. | |
2437 | */ | |
74babd95 | 2438 | session_lock_list(); |
54d01ffb DG |
2439 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2440 | if (cmd_ctx->session == NULL) { | |
2441 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2442 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2443 | } else { |
2444 | /* If no session name specified */ | |
f73fabfd | 2445 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2446 | } |
2447 | goto error; | |
2448 | } else { | |
2449 | /* Acquire lock for the session */ | |
2450 | session_lock(cmd_ctx->session); | |
2451 | } | |
2452 | break; | |
2453 | } | |
b389abbe | 2454 | |
2e09ba09 MD |
2455 | if (!need_domain) { |
2456 | goto skip_domain; | |
2457 | } | |
a4b92340 | 2458 | |
54d01ffb DG |
2459 | /* |
2460 | * Check domain type for specific "pre-action". | |
2461 | */ | |
2462 | switch (cmd_ctx->lsm->domain.type) { | |
2463 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2464 | if (!is_root) { |
f73fabfd | 2465 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2466 | goto error; |
2467 | } | |
2468 | ||
54d01ffb | 2469 | /* Kernel tracer check */ |
a4b35e07 | 2470 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2471 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2472 | ret = init_kernel_tracer(); |
2473 | if (ret != 0) { | |
54d01ffb DG |
2474 | goto error; |
2475 | } | |
2476 | } | |
5eb91c98 | 2477 | |
5c827ce0 DG |
2478 | /* Consumer is in an ERROR state. Report back to client */ |
2479 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2480 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2481 | goto error; |
2482 | } | |
2483 | ||
54d01ffb | 2484 | /* Need a session for kernel command */ |
44d3bd01 | 2485 | if (need_tracing_session) { |
54d01ffb | 2486 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2487 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2488 | if (ret < 0) { |
f73fabfd | 2489 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2490 | goto error; |
2491 | } | |
b389abbe | 2492 | } |
7d29a247 | 2493 | |
54d01ffb | 2494 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2495 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2496 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2497 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2498 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2499 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2500 | if (ret < 0) { |
f73fabfd | 2501 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2502 | goto error; |
950131af | 2503 | } |
5c827ce0 | 2504 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2505 | } else { |
2506 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2507 | } |
173af62f | 2508 | |
a4b92340 DG |
2509 | /* |
2510 | * The consumer was just spawned so we need to add the socket to | |
2511 | * the consumer output of the session if exist. | |
2512 | */ | |
2513 | ret = consumer_create_socket(&kconsumer_data, | |
2514 | cmd_ctx->session->kernel_session->consumer); | |
2515 | if (ret < 0) { | |
2516 | goto error; | |
173af62f | 2517 | } |
0d0c377a | 2518 | } |
5c827ce0 | 2519 | |
54d01ffb | 2520 | break; |
2bdd86d4 | 2521 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2522 | { |
5c827ce0 DG |
2523 | /* Consumer is in an ERROR state. Report back to client */ |
2524 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2525 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2526 | goto error; |
2527 | } | |
2528 | ||
44d3bd01 | 2529 | if (need_tracing_session) { |
a4b92340 | 2530 | /* Create UST session if none exist. */ |
f6a9efaa | 2531 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2532 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2533 | &cmd_ctx->lsm->domain); |
f73fabfd | 2534 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2535 | goto error; |
2536 | } | |
2537 | } | |
00e2e675 | 2538 | |
7753dea8 MD |
2539 | /* Start the UST consumer daemons */ |
2540 | /* 64-bit */ | |
2541 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2542 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2543 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2544 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2545 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2546 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2547 | if (ret < 0) { |
f73fabfd | 2548 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2549 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2550 | goto error; |
2551 | } | |
48842b30 | 2552 | |
173af62f | 2553 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2554 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2555 | } else { |
7753dea8 MD |
2556 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2557 | } | |
173af62f DG |
2558 | |
2559 | /* | |
2560 | * Setup socket for consumer 64 bit. No need for atomic access | |
2561 | * since it was set above and can ONLY be set in this thread. | |
2562 | */ | |
a4b92340 DG |
2563 | ret = consumer_create_socket(&ustconsumer64_data, |
2564 | cmd_ctx->session->ust_session->consumer); | |
2565 | if (ret < 0) { | |
2566 | goto error; | |
173af62f DG |
2567 | } |
2568 | ||
7753dea8 | 2569 | /* 32-bit */ |
fc7a59ce | 2570 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2571 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2572 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2573 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2574 | ret = start_consumerd(&ustconsumer32_data); | |
2575 | if (ret < 0) { | |
f73fabfd | 2576 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2577 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2578 | goto error; |
2579 | } | |
5c827ce0 | 2580 | |
173af62f | 2581 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2582 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2583 | } else { |
2584 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2585 | } |
173af62f DG |
2586 | |
2587 | /* | |
2588 | * Setup socket for consumer 64 bit. No need for atomic access | |
2589 | * since it was set above and can ONLY be set in this thread. | |
2590 | */ | |
a4b92340 DG |
2591 | ret = consumer_create_socket(&ustconsumer32_data, |
2592 | cmd_ctx->session->ust_session->consumer); | |
2593 | if (ret < 0) { | |
2594 | goto error; | |
173af62f | 2595 | } |
44d3bd01 DG |
2596 | } |
2597 | break; | |
48842b30 | 2598 | } |
54d01ffb | 2599 | default: |
54d01ffb DG |
2600 | break; |
2601 | } | |
2e09ba09 | 2602 | skip_domain: |
33a2b854 | 2603 | |
5c827ce0 DG |
2604 | /* Validate consumer daemon state when start/stop trace command */ |
2605 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2606 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2607 | switch (cmd_ctx->lsm->domain.type) { | |
2608 | case LTTNG_DOMAIN_UST: | |
2609 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2610 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2611 | goto error; |
2612 | } | |
2613 | break; | |
2614 | case LTTNG_DOMAIN_KERNEL: | |
2615 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2616 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2617 | goto error; |
2618 | } | |
2619 | break; | |
2620 | } | |
2621 | } | |
2622 | ||
8e0af1b4 MD |
2623 | /* |
2624 | * Check that the UID or GID match that of the tracing session. | |
2625 | * The root user can interact with all sessions. | |
2626 | */ | |
2627 | if (need_tracing_session) { | |
2628 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2629 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2630 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2631 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2632 | goto error; |
2633 | } | |
2634 | } | |
2635 | ||
ffe60014 DG |
2636 | /* |
2637 | * Send relayd information to consumer as soon as we have a domain and a | |
2638 | * session defined. | |
2639 | */ | |
2640 | if (cmd_ctx->session && need_domain) { | |
2641 | /* | |
2642 | * Setup relayd if not done yet. If the relayd information was already | |
2643 | * sent to the consumer, this call will gracefully return. | |
2644 | */ | |
2645 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2646 | if (ret != LTTNG_OK) { | |
2647 | goto error; | |
2648 | } | |
2649 | } | |
2650 | ||
54d01ffb DG |
2651 | /* Process by command type */ |
2652 | switch (cmd_ctx->lsm->cmd_type) { | |
2653 | case LTTNG_ADD_CONTEXT: | |
2654 | { | |
2655 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2656 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2657 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2658 | break; |
2659 | } | |
2660 | case LTTNG_DISABLE_CHANNEL: | |
2661 | { | |
2662 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2663 | cmd_ctx->lsm->u.disable.channel_name); | |
2664 | break; | |
2665 | } | |
2666 | case LTTNG_DISABLE_EVENT: | |
2667 | { | |
2668 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2669 | cmd_ctx->lsm->u.disable.channel_name, | |
2670 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2671 | break; |
2672 | } | |
54d01ffb DG |
2673 | case LTTNG_DISABLE_ALL_EVENT: |
2674 | { | |
2bdd86d4 | 2675 | DBG("Disabling all events"); |
54d01ffb DG |
2676 | |
2677 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2678 | cmd_ctx->lsm->u.disable.channel_name); | |
2679 | break; | |
2680 | } | |
2681 | case LTTNG_ENABLE_CHANNEL: | |
2682 | { | |
7972aab2 | 2683 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2684 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2685 | break; |
2686 | } | |
2687 | case LTTNG_ENABLE_EVENT: | |
2688 | { | |
7972aab2 | 2689 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
54d01ffb | 2690 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2691 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2692 | break; |
2693 | } | |
2694 | case LTTNG_ENABLE_ALL_EVENT: | |
2695 | { | |
2bdd86d4 | 2696 | DBG("Enabling all events"); |
54d01ffb | 2697 | |
7972aab2 | 2698 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 2699 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2700 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2701 | break; |
2702 | } | |
052da939 | 2703 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2704 | { |
9f19cc17 | 2705 | struct lttng_event *events; |
54d01ffb | 2706 | ssize_t nb_events; |
052da939 | 2707 | |
54d01ffb DG |
2708 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2709 | if (nb_events < 0) { | |
f73fabfd | 2710 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2711 | ret = -nb_events; |
2712 | goto error; | |
2ef84c95 DG |
2713 | } |
2714 | ||
2715 | /* | |
2716 | * Setup lttng message with payload size set to the event list size in | |
2717 | * bytes and then copy list into the llm payload. | |
2718 | */ | |
052da939 | 2719 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2720 | if (ret < 0) { |
052da939 | 2721 | free(events); |
2ef84c95 DG |
2722 | goto setup_error; |
2723 | } | |
2724 | ||
2725 | /* Copy event list into message payload */ | |
9f19cc17 | 2726 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2727 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2728 | |
9f19cc17 | 2729 | free(events); |
2ef84c95 | 2730 | |
f73fabfd | 2731 | ret = LTTNG_OK; |
2ef84c95 DG |
2732 | break; |
2733 | } | |
f37d259d MD |
2734 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2735 | { | |
2736 | struct lttng_event_field *fields; | |
2737 | ssize_t nb_fields; | |
2738 | ||
a4b92340 DG |
2739 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2740 | &fields); | |
f37d259d | 2741 | if (nb_fields < 0) { |
f73fabfd | 2742 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2743 | ret = -nb_fields; |
2744 | goto error; | |
2745 | } | |
2746 | ||
2747 | /* | |
2748 | * Setup lttng message with payload size set to the event list size in | |
2749 | * bytes and then copy list into the llm payload. | |
2750 | */ | |
a4b92340 DG |
2751 | ret = setup_lttng_msg(cmd_ctx, |
2752 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2753 | if (ret < 0) { |
2754 | free(fields); | |
2755 | goto setup_error; | |
2756 | } | |
2757 | ||
2758 | /* Copy event list into message payload */ | |
2759 | memcpy(cmd_ctx->llm->payload, fields, | |
2760 | sizeof(struct lttng_event_field) * nb_fields); | |
2761 | ||
2762 | free(fields); | |
2763 | ||
f73fabfd | 2764 | ret = LTTNG_OK; |
f37d259d MD |
2765 | break; |
2766 | } | |
00e2e675 DG |
2767 | case LTTNG_SET_CONSUMER_URI: |
2768 | { | |
a4b92340 DG |
2769 | size_t nb_uri, len; |
2770 | struct lttng_uri *uris; | |
2771 | ||
2772 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2773 | len = nb_uri * sizeof(struct lttng_uri); | |
2774 | ||
2775 | if (nb_uri == 0) { | |
f73fabfd | 2776 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2777 | goto error; |
2778 | } | |
2779 | ||
2780 | uris = zmalloc(len); | |
2781 | if (uris == NULL) { | |
f73fabfd | 2782 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2783 | goto error; |
2784 | } | |
2785 | ||
2786 | /* Receive variable len data */ | |
77c7c900 | 2787 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2788 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2789 | if (ret <= 0) { | |
2790 | DBG("No URIs received from client... continuing"); | |
2791 | *sock_error = 1; | |
f73fabfd | 2792 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2793 | free(uris); |
a4b92340 DG |
2794 | goto error; |
2795 | } | |
2796 | ||
00e2e675 | 2797 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2798 | nb_uri, uris); |
f73fabfd | 2799 | if (ret != LTTNG_OK) { |
b1d41407 | 2800 | free(uris); |
a4b92340 DG |
2801 | goto error; |
2802 | } | |
2803 | ||
2804 | /* | |
2805 | * XXX: 0 means that this URI should be applied on the session. Should | |
2806 | * be a DOMAIN enuam. | |
2807 | */ | |
2808 | if (cmd_ctx->lsm->domain.type == 0) { | |
2809 | /* Add the URI for the UST session if a consumer is present. */ | |
2810 | if (cmd_ctx->session->ust_session && | |
2811 | cmd_ctx->session->ust_session->consumer) { | |
2812 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2813 | nb_uri, uris); | |
2814 | } else if (cmd_ctx->session->kernel_session && | |
2815 | cmd_ctx->session->kernel_session->consumer) { | |
2816 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2817 | cmd_ctx->session, nb_uri, uris); | |
2818 | } | |
2819 | } | |
2820 | ||
b1d41407 DG |
2821 | free(uris); |
2822 | ||
00e2e675 DG |
2823 | break; |
2824 | } | |
f3ed775e | 2825 | case LTTNG_START_TRACE: |
8c0faa1d | 2826 | { |
54d01ffb | 2827 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2828 | break; |
2829 | } | |
f3ed775e | 2830 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2831 | { |
54d01ffb | 2832 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2833 | break; |
2834 | } | |
5e16da05 MD |
2835 | case LTTNG_CREATE_SESSION: |
2836 | { | |
a4b92340 DG |
2837 | size_t nb_uri, len; |
2838 | struct lttng_uri *uris = NULL; | |
2839 | ||
2840 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2841 | len = nb_uri * sizeof(struct lttng_uri); | |
2842 | ||
2843 | if (nb_uri > 0) { | |
2844 | uris = zmalloc(len); | |
2845 | if (uris == NULL) { | |
f73fabfd | 2846 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2847 | goto error; |
2848 | } | |
2849 | ||
2850 | /* Receive variable len data */ | |
77c7c900 | 2851 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2852 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2853 | if (ret <= 0) { | |
2854 | DBG("No URIs received from client... continuing"); | |
2855 | *sock_error = 1; | |
f73fabfd | 2856 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2857 | free(uris); |
a4b92340 DG |
2858 | goto error; |
2859 | } | |
2860 | ||
2861 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2862 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2863 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2864 | free(uris); |
a4b92340 DG |
2865 | goto error; |
2866 | } | |
2867 | } | |
2868 | ||
2869 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2870 | &cmd_ctx->creds); | |
2871 | ||
b1d41407 DG |
2872 | free(uris); |
2873 | ||
00e2e675 DG |
2874 | break; |
2875 | } | |
5e16da05 MD |
2876 | case LTTNG_DESTROY_SESSION: |
2877 | { | |
2f77fc4b | 2878 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2879 | |
2880 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2881 | cmd_ctx->session = NULL; |
5461b305 | 2882 | break; |
5e16da05 | 2883 | } |
9f19cc17 | 2884 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2885 | { |
54d01ffb DG |
2886 | ssize_t nb_dom; |
2887 | struct lttng_domain *domains; | |
5461b305 | 2888 | |
54d01ffb DG |
2889 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2890 | if (nb_dom < 0) { | |
f73fabfd | 2891 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2892 | ret = -nb_dom; |
2893 | goto error; | |
ce3d728c | 2894 | } |
520ff687 | 2895 | |
54d01ffb | 2896 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
2897 | if (ret < 0) { |
2898 | goto setup_error; | |
520ff687 | 2899 | } |
57167058 | 2900 | |
54d01ffb DG |
2901 | /* Copy event list into message payload */ |
2902 | memcpy(cmd_ctx->llm->payload, domains, | |
2903 | nb_dom * sizeof(struct lttng_domain)); | |
2904 | ||
2905 | free(domains); | |
5e16da05 | 2906 | |
f73fabfd | 2907 | ret = LTTNG_OK; |
5e16da05 MD |
2908 | break; |
2909 | } | |
9f19cc17 | 2910 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2911 | { |
6775595e | 2912 | int nb_chan; |
54d01ffb DG |
2913 | struct lttng_channel *channels; |
2914 | ||
b551a063 DG |
2915 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2916 | cmd_ctx->session, &channels); | |
54d01ffb | 2917 | if (nb_chan < 0) { |
f73fabfd | 2918 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2919 | ret = -nb_chan; |
2920 | goto error; | |
5461b305 | 2921 | } |
ca95a216 | 2922 | |
54d01ffb | 2923 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
2924 | if (ret < 0) { |
2925 | goto setup_error; | |
2926 | } | |
9f19cc17 | 2927 | |
54d01ffb DG |
2928 | /* Copy event list into message payload */ |
2929 | memcpy(cmd_ctx->llm->payload, channels, | |
2930 | nb_chan * sizeof(struct lttng_channel)); | |
2931 | ||
2932 | free(channels); | |
9f19cc17 | 2933 | |
f73fabfd | 2934 | ret = LTTNG_OK; |
5461b305 | 2935 | break; |
5e16da05 | 2936 | } |
9f19cc17 | 2937 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2938 | { |
b551a063 | 2939 | ssize_t nb_event; |
684d34d2 | 2940 | struct lttng_event *events = NULL; |
9f19cc17 | 2941 | |
b551a063 | 2942 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2943 | cmd_ctx->lsm->u.list.channel_name, &events); |
2944 | if (nb_event < 0) { | |
f73fabfd | 2945 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2946 | ret = -nb_event; |
2947 | goto error; | |
5461b305 | 2948 | } |
ca95a216 | 2949 | |
54d01ffb | 2950 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
2951 | if (ret < 0) { |
2952 | goto setup_error; | |
2953 | } | |
9f19cc17 | 2954 | |
54d01ffb DG |
2955 | /* Copy event list into message payload */ |
2956 | memcpy(cmd_ctx->llm->payload, events, | |
2957 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2958 | |
54d01ffb | 2959 | free(events); |
9f19cc17 | 2960 | |
f73fabfd | 2961 | ret = LTTNG_OK; |
5461b305 | 2962 | break; |
5e16da05 MD |
2963 | } |
2964 | case LTTNG_LIST_SESSIONS: | |
2965 | { | |
8e0af1b4 | 2966 | unsigned int nr_sessions; |
5461b305 | 2967 | |
8e0af1b4 | 2968 | session_lock_list(); |
730389d9 DG |
2969 | nr_sessions = lttng_sessions_count( |
2970 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
2971 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 2972 | |
8e0af1b4 | 2973 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 2974 | if (ret < 0) { |
54d01ffb | 2975 | session_unlock_list(); |
5461b305 | 2976 | goto setup_error; |
e065084a | 2977 | } |
5e16da05 | 2978 | |
6c9cc2ab | 2979 | /* Filled the session array */ |
2f77fc4b | 2980 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
2981 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2982 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 2983 | |
54d01ffb | 2984 | session_unlock_list(); |
5e16da05 | 2985 | |
f73fabfd | 2986 | ret = LTTNG_OK; |
5e16da05 MD |
2987 | break; |
2988 | } | |
d0254c7c MD |
2989 | case LTTNG_CALIBRATE: |
2990 | { | |
54d01ffb DG |
2991 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
2992 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
2993 | break; |
2994 | } | |
d9800920 DG |
2995 | case LTTNG_REGISTER_CONSUMER: |
2996 | { | |
2f77fc4b DG |
2997 | struct consumer_data *cdata; |
2998 | ||
2999 | switch (cmd_ctx->lsm->domain.type) { | |
3000 | case LTTNG_DOMAIN_KERNEL: | |
3001 | cdata = &kconsumer_data; | |
3002 | break; | |
3003 | default: | |
f73fabfd | 3004 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3005 | goto error; |
3006 | } | |
3007 | ||
54d01ffb | 3008 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3009 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3010 | break; |
3011 | } | |
025faf73 | 3012 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
3013 | { |
3014 | struct lttng_filter_bytecode *bytecode; | |
3015 | ||
025faf73 | 3016 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 3017 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3018 | goto error; |
3019 | } | |
52df2401 MD |
3020 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
3021 | ret = LTTNG_ERR_FILTER_INVAL; | |
3022 | goto error; | |
3023 | } | |
025faf73 | 3024 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 3025 | if (!bytecode) { |
f73fabfd | 3026 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
3027 | goto error; |
3028 | } | |
3029 | /* Receive var. len. data */ | |
3030 | DBG("Receiving var len data from client ..."); | |
3031 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 3032 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
3033 | if (ret <= 0) { |
3034 | DBG("Nothing recv() from client var len data... continuing"); | |
3035 | *sock_error = 1; | |
f73fabfd | 3036 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3037 | goto error; |
3038 | } | |
3039 | ||
3040 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 3041 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 3042 | free(bytecode); |
f73fabfd | 3043 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3044 | goto error; |
3045 | } | |
3046 | ||
7972aab2 | 3047 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
025faf73 DG |
3048 | cmd_ctx->lsm->u.enable.channel_name, |
3049 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
3050 | break; |
3051 | } | |
6d805429 | 3052 | case LTTNG_DATA_PENDING: |
806e2684 | 3053 | { |
6d805429 | 3054 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3055 | break; |
3056 | } | |
5e16da05 | 3057 | default: |
f73fabfd | 3058 | ret = LTTNG_ERR_UND; |
5461b305 | 3059 | break; |
fac6795d DG |
3060 | } |
3061 | ||
5461b305 | 3062 | error: |
5461b305 DG |
3063 | if (cmd_ctx->llm == NULL) { |
3064 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3065 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3066 | goto setup_error; |
3067 | } | |
3068 | } | |
54d01ffb | 3069 | /* Set return code */ |
5461b305 | 3070 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3071 | setup_error: |
b5541356 | 3072 | if (cmd_ctx->session) { |
54d01ffb | 3073 | session_unlock(cmd_ctx->session); |
b5541356 | 3074 | } |
256a5576 MD |
3075 | if (need_tracing_session) { |
3076 | session_unlock_list(); | |
3077 | } | |
54d01ffb | 3078 | init_setup_error: |
8028d920 | 3079 | return ret; |
fac6795d DG |
3080 | } |
3081 | ||
44a5e5eb DG |
3082 | /* |
3083 | * Thread managing health check socket. | |
3084 | */ | |
3085 | static void *thread_manage_health(void *data) | |
3086 | { | |
eb4a2943 | 3087 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3088 | uint32_t revents, nb_fd; |
3089 | struct lttng_poll_event events; | |
3090 | struct lttcomm_health_msg msg; | |
3091 | struct lttcomm_health_data reply; | |
3092 | ||
3093 | DBG("[thread] Manage health check started"); | |
3094 | ||
3095 | rcu_register_thread(); | |
3096 | ||
3097 | /* Create unix socket */ | |
3098 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3099 | if (sock < 0) { | |
3100 | ERR("Unable to create health check Unix socket"); | |
3101 | ret = -1; | |
3102 | goto error; | |
3103 | } | |
3104 | ||
b662582b DG |
3105 | /* |
3106 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3107 | * show must go on. | |
3108 | */ | |
3109 | (void) utils_set_fd_cloexec(sock); | |
3110 | ||
44a5e5eb DG |
3111 | ret = lttcomm_listen_unix_sock(sock); |
3112 | if (ret < 0) { | |
3113 | goto error; | |
3114 | } | |
3115 | ||
3116 | /* | |
3117 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3118 | * more will be added to this poll set. | |
3119 | */ | |
d0b96690 | 3120 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3121 | if (ret < 0) { |
3122 | goto error; | |
3123 | } | |
3124 | ||
3125 | /* Add the application registration socket */ | |
3126 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3127 | if (ret < 0) { | |
3128 | goto error; | |
3129 | } | |
3130 | ||
3131 | while (1) { | |
3132 | DBG("Health check ready"); | |
3133 | ||
44a5e5eb DG |
3134 | /* Inifinite blocking call, waiting for transmission */ |
3135 | restart: | |
3136 | ret = lttng_poll_wait(&events, -1); | |
3137 | if (ret < 0) { | |
3138 | /* | |
3139 | * Restart interrupted system call. | |
3140 | */ | |
3141 | if (errno == EINTR) { | |
3142 | goto restart; | |
3143 | } | |
3144 | goto error; | |
3145 | } | |
3146 | ||
0d9c5d77 DG |
3147 | nb_fd = ret; |
3148 | ||
44a5e5eb DG |
3149 | for (i = 0; i < nb_fd; i++) { |
3150 | /* Fetch once the poll data */ | |
3151 | revents = LTTNG_POLL_GETEV(&events, i); | |
3152 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3153 | ||
3154 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3155 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3156 | if (ret) { |
139ac872 MD |
3157 | err = 0; |
3158 | goto exit; | |
44a5e5eb DG |
3159 | } |
3160 | ||
3161 | /* Event on the registration socket */ | |
3162 | if (pollfd == sock) { | |
3163 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3164 | ERR("Health socket poll error"); | |
3165 | goto error; | |
3166 | } | |
3167 | } | |
3168 | } | |
3169 | ||
3170 | new_sock = lttcomm_accept_unix_sock(sock); | |
3171 | if (new_sock < 0) { | |
3172 | goto error; | |
3173 | } | |
3174 | ||
b662582b DG |
3175 | /* |
3176 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3177 | * show must go on. | |
3178 | */ | |
3179 | (void) utils_set_fd_cloexec(new_sock); | |
3180 | ||
44a5e5eb DG |
3181 | DBG("Receiving data from client for health..."); |
3182 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3183 | if (ret <= 0) { | |
3184 | DBG("Nothing recv() from client... continuing"); | |
3185 | ret = close(new_sock); | |
3186 | if (ret) { | |
3187 | PERROR("close"); | |
3188 | } | |
3189 | new_sock = -1; | |
3190 | continue; | |
3191 | } | |
3192 | ||
3193 | rcu_thread_online(); | |
3194 | ||
3195 | switch (msg.component) { | |
3196 | case LTTNG_HEALTH_CMD: | |
927ca06a | 3197 | reply.ret_code = health_check_state(HEALTH_TYPE_CMD); |
44a5e5eb | 3198 | break; |
139ac872 | 3199 | case LTTNG_HEALTH_APP_MANAGE: |
927ca06a | 3200 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE); |
139ac872 | 3201 | break; |
44a5e5eb | 3202 | case LTTNG_HEALTH_APP_REG: |
927ca06a | 3203 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG); |
44a5e5eb DG |
3204 | break; |
3205 | case LTTNG_HEALTH_KERNEL: | |
927ca06a | 3206 | reply.ret_code = health_check_state(HEALTH_TYPE_KERNEL); |
44a5e5eb DG |
3207 | break; |
3208 | case LTTNG_HEALTH_CONSUMER: | |
3209 | reply.ret_code = check_consumer_health(); | |
3210 | break; | |
3211 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 3212 | reply.ret_code = |
927ca06a DG |
3213 | health_check_state(HEALTH_TYPE_APP_MANAGE) && |
3214 | health_check_state(HEALTH_TYPE_APP_REG) && | |
3215 | health_check_state(HEALTH_TYPE_CMD) && | |
3216 | health_check_state(HEALTH_TYPE_KERNEL) && | |
139ac872 | 3217 | check_consumer_health(); |
44a5e5eb DG |
3218 | break; |
3219 | default: | |
f73fabfd | 3220 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3221 | break; |
3222 | } | |
3223 | ||
3224 | /* | |
3225 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3226 | * the client where in the sessiond it is the opposite. Again, this is | |
3227 | * just to make things easier for us poor developer which enjoy a lot | |
3228 | * lazyness. | |
3229 | */ | |
3230 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3231 | reply.ret_code = !reply.ret_code; | |
3232 | } | |
3233 | ||
3234 | DBG2("Health check return value %d", reply.ret_code); | |
3235 | ||
3236 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3237 | if (ret < 0) { | |
3238 | ERR("Failed to send health data back to client"); | |
3239 | } | |
3240 | ||
3241 | /* End of transmission */ | |
3242 | ret = close(new_sock); | |
3243 | if (ret) { | |
3244 | PERROR("close"); | |
3245 | } | |
3246 | new_sock = -1; | |
3247 | } | |
3248 | ||
139ac872 | 3249 | exit: |
44a5e5eb | 3250 | error: |
139ac872 MD |
3251 | if (err) { |
3252 | ERR("Health error occurred in %s", __func__); | |
3253 | } | |
44a5e5eb DG |
3254 | DBG("Health check thread dying"); |
3255 | unlink(health_unix_sock_path); | |
3256 | if (sock >= 0) { | |
3257 | ret = close(sock); | |
3258 | if (ret) { | |
3259 | PERROR("close"); | |
3260 | } | |
3261 | } | |
3262 | if (new_sock >= 0) { | |
3263 | ret = close(new_sock); | |
3264 | if (ret) { | |
3265 | PERROR("close"); | |
3266 | } | |
3267 | } | |
3268 | ||
3269 | lttng_poll_clean(&events); | |
3270 | ||
3271 | rcu_unregister_thread(); | |
3272 | return NULL; | |
3273 | } | |
3274 | ||
1d4b027a | 3275 | /* |
d063d709 DG |
3276 | * This thread manage all clients request using the unix client socket for |
3277 | * communication. | |
1d4b027a DG |
3278 | */ |
3279 | static void *thread_manage_clients(void *data) | |
3280 | { | |
139ac872 | 3281 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3282 | int sock_error; |
5eb91c98 | 3283 | uint32_t revents, nb_fd; |
273ea72c | 3284 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3285 | struct lttng_poll_event events; |
1d4b027a DG |
3286 | |
3287 | DBG("[thread] Manage client started"); | |
3288 | ||
f6a9efaa DG |
3289 | rcu_register_thread(); |
3290 | ||
927ca06a DG |
3291 | health_register(HEALTH_TYPE_CMD); |
3292 | ||
6993eeb3 CB |
3293 | if (testpoint(thread_manage_clients)) { |
3294 | goto error_testpoint; | |
3295 | } | |
3296 | ||
840cb59c | 3297 | health_code_update(); |
44a5e5eb | 3298 | |
1d4b027a DG |
3299 | ret = lttcomm_listen_unix_sock(client_sock); |
3300 | if (ret < 0) { | |
35df2755 | 3301 | goto error_listen; |
1d4b027a DG |
3302 | } |
3303 | ||
5eb91c98 DG |
3304 | /* |
3305 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3306 | * more will be added to this poll set. | |
3307 | */ | |
d0b96690 | 3308 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3309 | if (ret < 0) { |
35df2755 | 3310 | goto error_create_poll; |
5eb91c98 | 3311 | } |
273ea72c | 3312 | |
5eb91c98 DG |
3313 | /* Add the application registration socket */ |
3314 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3315 | if (ret < 0) { | |
3316 | goto error; | |
3317 | } | |
273ea72c | 3318 | |
bbd973c2 DG |
3319 | /* |
3320 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3321 | */ |
3322 | if (opt_sig_parent) { | |
8db8d1dc | 3323 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3324 | } |
3325 | ||
6993eeb3 CB |
3326 | if (testpoint(thread_manage_clients_before_loop)) { |
3327 | goto error; | |
3328 | } | |
8ac94142 | 3329 | |
840cb59c | 3330 | health_code_update(); |
44a5e5eb | 3331 | |
1d4b027a | 3332 | while (1) { |
1d4b027a | 3333 | DBG("Accepting client command ..."); |
273ea72c DG |
3334 | |
3335 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3336 | restart: |
a78af745 | 3337 | health_poll_entry(); |
5eb91c98 | 3338 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3339 | health_poll_exit(); |
273ea72c | 3340 | if (ret < 0) { |
88f2b785 MD |
3341 | /* |
3342 | * Restart interrupted system call. | |
3343 | */ | |
3344 | if (errno == EINTR) { | |
3345 | goto restart; | |
3346 | } | |
273ea72c DG |
3347 | goto error; |
3348 | } | |
3349 | ||
0d9c5d77 DG |
3350 | nb_fd = ret; |
3351 | ||
5eb91c98 DG |
3352 | for (i = 0; i < nb_fd; i++) { |
3353 | /* Fetch once the poll data */ | |
3354 | revents = LTTNG_POLL_GETEV(&events, i); | |
3355 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3356 | ||
840cb59c | 3357 | health_code_update(); |
44a5e5eb | 3358 | |
5eb91c98 | 3359 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3360 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3361 | if (ret) { |
139ac872 MD |
3362 | err = 0; |
3363 | goto exit; | |
5eb91c98 DG |
3364 | } |
3365 | ||
3366 | /* Event on the registration socket */ | |
3367 | if (pollfd == client_sock) { | |
3368 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3369 | ERR("Client socket poll error"); | |
3370 | goto error; | |
3371 | } | |
3372 | } | |
3373 | } | |
3374 | ||
3375 | DBG("Wait for client response"); | |
3376 | ||
840cb59c | 3377 | health_code_update(); |
44a5e5eb | 3378 | |
5eb91c98 DG |
3379 | sock = lttcomm_accept_unix_sock(client_sock); |
3380 | if (sock < 0) { | |
273ea72c | 3381 | goto error; |
273ea72c DG |
3382 | } |
3383 | ||
b662582b DG |
3384 | /* |
3385 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3386 | * show must go on. | |
3387 | */ | |
3388 | (void) utils_set_fd_cloexec(sock); | |
3389 | ||
be040666 DG |
3390 | /* Set socket option for credentials retrieval */ |
3391 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3392 | if (ret < 0) { | |
3393 | goto error; | |
3394 | } | |
3395 | ||
5eb91c98 | 3396 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3397 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3398 | if (cmd_ctx == NULL) { |
76d7553f | 3399 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3400 | goto error; |
5eb91c98 | 3401 | } |
1d4b027a | 3402 | |
5eb91c98 | 3403 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3404 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3405 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3406 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3407 | goto error; |
3408 | } | |
1d4b027a | 3409 | |
5eb91c98 DG |
3410 | cmd_ctx->llm = NULL; |
3411 | cmd_ctx->session = NULL; | |
1d4b027a | 3412 | |
840cb59c | 3413 | health_code_update(); |
44a5e5eb | 3414 | |
5eb91c98 DG |
3415 | /* |
3416 | * Data is received from the lttng client. The struct | |
3417 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3418 | * the client. | |
3419 | */ | |
3420 | DBG("Receiving data from client ..."); | |
be040666 DG |
3421 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3422 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3423 | if (ret <= 0) { |
3424 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3425 | ret = close(sock); |
3426 | if (ret) { | |
3427 | PERROR("close"); | |
3428 | } | |
3429 | sock = -1; | |
a2c0da86 | 3430 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3431 | continue; |
3432 | } | |
1d4b027a | 3433 | |
840cb59c | 3434 | health_code_update(); |
44a5e5eb | 3435 | |
5eb91c98 DG |
3436 | // TODO: Validate cmd_ctx including sanity check for |
3437 | // security purpose. | |
f7776ea7 | 3438 | |
f6a9efaa | 3439 | rcu_thread_online(); |
5eb91c98 DG |
3440 | /* |
3441 | * This function dispatch the work to the kernel or userspace tracer | |
3442 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3443 | * informations for the client. The command context struct contains | |
3444 | * everything this function may needs. | |
3445 | */ | |
53a80697 | 3446 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3447 | rcu_thread_offline(); |
5eb91c98 | 3448 | if (ret < 0) { |
53a80697 MD |
3449 | if (sock_error) { |
3450 | ret = close(sock); | |
3451 | if (ret) { | |
3452 | PERROR("close"); | |
3453 | } | |
3454 | sock = -1; | |
3455 | } | |
bbd973c2 | 3456 | /* |
5eb91c98 | 3457 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3458 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3459 | * (ENOMEM). Error detected but still accept |
3460 | * command, unless a socket error has been | |
3461 | * detected. | |
bbd973c2 | 3462 | */ |
bbd973c2 | 3463 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3464 | continue; |
3465 | } | |
d6e4fca4 | 3466 | |
840cb59c | 3467 | health_code_update(); |
44a5e5eb | 3468 | |
54d01ffb DG |
3469 | DBG("Sending response (size: %d, retcode: %s)", |
3470 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3471 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3472 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3473 | if (ret < 0) { |
3474 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3475 | } |
1d4b027a | 3476 | |
5eb91c98 | 3477 | /* End of transmission */ |
76d7553f MD |
3478 | ret = close(sock); |
3479 | if (ret) { | |
3480 | PERROR("close"); | |
3481 | } | |
3482 | sock = -1; | |
be040666 DG |
3483 | |
3484 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3485 | |
840cb59c | 3486 | health_code_update(); |
273ea72c DG |
3487 | } |
3488 | ||
139ac872 | 3489 | exit: |
5eb91c98 | 3490 | error: |
35df2755 CB |
3491 | if (sock >= 0) { |
3492 | ret = close(sock); | |
3493 | if (ret) { | |
3494 | PERROR("close"); | |
3495 | } | |
139ac872 | 3496 | } |
44a5e5eb | 3497 | |
35df2755 CB |
3498 | lttng_poll_clean(&events); |
3499 | clean_command_ctx(&cmd_ctx); | |
3500 | ||
3501 | error_listen: | |
3502 | error_create_poll: | |
6993eeb3 | 3503 | error_testpoint: |
273ea72c | 3504 | unlink(client_unix_sock_path); |
76d7553f MD |
3505 | if (client_sock >= 0) { |
3506 | ret = close(client_sock); | |
3507 | if (ret) { | |
3508 | PERROR("close"); | |
3509 | } | |
a4b35e07 | 3510 | } |
35df2755 CB |
3511 | |
3512 | if (err) { | |
840cb59c | 3513 | health_error(); |
35df2755 | 3514 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3515 | } |
273ea72c | 3516 | |
927ca06a | 3517 | health_unregister(); |
35df2755 CB |
3518 | |
3519 | DBG("Client thread dying"); | |
f6a9efaa DG |
3520 | |
3521 | rcu_unregister_thread(); | |
1d4b027a DG |
3522 | return NULL; |
3523 | } | |
3524 | ||
3525 | ||
fac6795d DG |
3526 | /* |
3527 | * usage function on stderr | |
3528 | */ | |
3529 | static void usage(void) | |
3530 | { | |
b716ce68 | 3531 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3532 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3533 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3534 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3535 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3536 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3537 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3538 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3539 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3540 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3541 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3542 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3543 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3544 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3545 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3546 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3547 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3548 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3549 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3550 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 3551 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 3552 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3553 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3554 | } |
3555 | ||
3556 | /* | |
3557 | * daemon argument parsing | |
3558 | */ | |
3559 | static int parse_args(int argc, char **argv) | |
3560 | { | |
3561 | int c; | |
3562 | ||
3563 | static struct option long_options[] = { | |
3564 | { "client-sock", 1, 0, 'c' }, | |
3565 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3566 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3567 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3568 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3569 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3570 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3571 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3572 | { "consumerd32-path", 1, 0, 'u' }, | |
3573 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3574 | { "consumerd64-path", 1, 0, 't' }, | |
3575 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3576 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3577 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3578 | { "help", 0, 0, 'h' }, |
3579 | { "group", 1, 0, 'g' }, | |
3580 | { "version", 0, 0, 'V' }, | |
75462a81 | 3581 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3582 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3583 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3584 | { "no-kernel", 0, 0, 'N' }, |
35f90c40 | 3585 | { "pidfile", 1, 0, 'p' }, |
fac6795d DG |
3586 | { NULL, 0, 0, 0 } |
3587 | }; | |
3588 | ||
3589 | while (1) { | |
3590 | int option_index = 0; | |
35f90c40 | 3591 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t:p:", |
54d01ffb | 3592 | long_options, &option_index); |
fac6795d DG |
3593 | if (c == -1) { |
3594 | break; | |
3595 | } | |
3596 | ||
3597 | switch (c) { | |
3598 | case 0: | |
3599 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3600 | if (optarg) { | |
3601 | fprintf(stderr, " with arg %s\n", optarg); | |
3602 | } | |
3603 | break; | |
b716ce68 | 3604 | case 'c': |
fac6795d DG |
3605 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3606 | break; | |
3607 | case 'a': | |
3608 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3609 | break; | |
3610 | case 'd': | |
3611 | opt_daemon = 1; | |
3612 | break; | |
3613 | case 'g': | |
fb09408a | 3614 | opt_tracing_group = optarg; |
fac6795d DG |
3615 | break; |
3616 | case 'h': | |
3617 | usage(); | |
3618 | exit(EXIT_FAILURE); | |
3619 | case 'V': | |
3620 | fprintf(stdout, "%s\n", VERSION); | |
3621 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3622 | case 'S': |
3623 | opt_sig_parent = 1; | |
3624 | break; | |
d6f42150 | 3625 | case 'E': |
3bd1e081 | 3626 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3627 | break; |
3628 | case 'C': | |
3bd1e081 MD |
3629 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3630 | break; | |
3631 | case 'F': | |
7753dea8 | 3632 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3633 | break; |
3634 | case 'D': | |
7753dea8 MD |
3635 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3636 | break; | |
3637 | case 'H': | |
3638 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3639 | break; | |
3640 | case 'G': | |
3641 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3642 | break; |
4fba7219 DG |
3643 | case 'N': |
3644 | opt_no_kernel = 1; | |
3645 | break; | |
75462a81 | 3646 | case 'q': |
97e19046 | 3647 | lttng_opt_quiet = 1; |
75462a81 | 3648 | break; |
3f9947db | 3649 | case 'v': |
53086306 | 3650 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3651 | lttng_opt_verbose += 1; |
3f9947db | 3652 | break; |
31f73cc9 | 3653 | case 'Z': |
3bd1e081 | 3654 | opt_verbose_consumer += 1; |
31f73cc9 | 3655 | break; |
fb09408a | 3656 | case 'u': |
fc7a59ce | 3657 | consumerd32_bin= optarg; |
ebaeda94 MD |
3658 | break; |
3659 | case 'U': | |
3660 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3661 | break; |
3662 | case 't': | |
fc7a59ce | 3663 | consumerd64_bin = optarg; |
ebaeda94 MD |
3664 | break; |
3665 | case 'T': | |
3666 | consumerd64_libdir = optarg; | |
fb09408a | 3667 | break; |
35f90c40 DG |
3668 | case 'p': |
3669 | opt_pidfile = optarg; | |
3670 | break; | |
fac6795d DG |
3671 | default: |
3672 | /* Unknown option or other error. | |
3673 | * Error is printed by getopt, just return */ | |
3674 | return -1; | |
3675 | } | |
3676 | } | |
3677 | ||
3678 | return 0; | |
3679 | } | |
3680 | ||
3681 | /* | |
d063d709 | 3682 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3683 | * apps_sock - The communication socket for all UST apps. |
3684 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3685 | */ |
cf3af59e | 3686 | static int init_daemon_socket(void) |
fac6795d DG |
3687 | { |
3688 | int ret = 0; | |
3689 | mode_t old_umask; | |
3690 | ||
3691 | old_umask = umask(0); | |
3692 | ||
3693 | /* Create client tool unix socket */ | |
d6f42150 DG |
3694 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3695 | if (client_sock < 0) { | |
3696 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3697 | ret = -1; |
3698 | goto end; | |
3699 | } | |
3700 | ||
b662582b DG |
3701 | /* Set the cloexec flag */ |
3702 | ret = utils_set_fd_cloexec(client_sock); | |
3703 | if (ret < 0) { | |
3704 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3705 | "Continuing but note that the consumer daemon will have a " | |
3706 | "reference to this socket on exec()", client_sock); | |
3707 | } | |
3708 | ||
fac6795d DG |
3709 | /* File permission MUST be 660 */ |
3710 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3711 | if (ret < 0) { | |
d6f42150 | 3712 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3713 | PERROR("chmod"); |
fac6795d DG |
3714 | goto end; |
3715 | } | |
3716 | ||
3717 | /* Create the application unix socket */ | |
d6f42150 DG |
3718 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3719 | if (apps_sock < 0) { | |
3720 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3721 | ret = -1; |
3722 | goto end; | |
3723 | } | |
3724 | ||
b662582b DG |
3725 | /* Set the cloexec flag */ |
3726 | ret = utils_set_fd_cloexec(apps_sock); | |
3727 | if (ret < 0) { | |
3728 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3729 | "Continuing but note that the consumer daemon will have a " | |
3730 | "reference to this socket on exec()", apps_sock); | |
3731 | } | |
3732 | ||
d6f42150 | 3733 | /* File permission MUST be 666 */ |
54d01ffb DG |
3734 | ret = chmod(apps_unix_sock_path, |
3735 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3736 | if (ret < 0) { |
d6f42150 | 3737 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3738 | PERROR("chmod"); |
fac6795d DG |
3739 | goto end; |
3740 | } | |
3741 | ||
b662582b DG |
3742 | DBG3("Session daemon client socket %d and application socket %d created", |
3743 | client_sock, apps_sock); | |
3744 | ||
fac6795d DG |
3745 | end: |
3746 | umask(old_umask); | |
3747 | return ret; | |
3748 | } | |
3749 | ||
3750 | /* | |
54d01ffb DG |
3751 | * Check if the global socket is available, and if a daemon is answering at the |
3752 | * other side. If yes, error is returned. | |
fac6795d | 3753 | */ |
cf3af59e | 3754 | static int check_existing_daemon(void) |
fac6795d | 3755 | { |
7d8234d9 | 3756 | /* Is there anybody out there ? */ |
099e26bd | 3757 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3758 | return -EEXIST; |
099e26bd | 3759 | } |
b09c7c76 DG |
3760 | |
3761 | return 0; | |
fac6795d DG |
3762 | } |
3763 | ||
fac6795d | 3764 | /* |
d063d709 | 3765 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3766 | * |
d063d709 | 3767 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3768 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3769 | */ |
be040666 | 3770 | static int set_permissions(char *rundir) |
fac6795d DG |
3771 | { |
3772 | int ret; | |
996b65c8 | 3773 | gid_t gid; |
fac6795d | 3774 | |
6775595e DG |
3775 | ret = allowed_group(); |
3776 | if (ret < 0) { | |
be040666 DG |
3777 | WARN("No tracing group detected"); |
3778 | ret = 0; | |
fac6795d DG |
3779 | goto end; |
3780 | } | |
3781 | ||
6775595e DG |
3782 | gid = ret; |
3783 | ||
d6f42150 | 3784 | /* Set lttng run dir */ |
be040666 | 3785 | ret = chown(rundir, 0, gid); |
d6f42150 | 3786 | if (ret < 0) { |
be040666 | 3787 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3788 | PERROR("chown"); |
d6f42150 DG |
3789 | } |
3790 | ||
d1613cf5 | 3791 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3792 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3793 | if (ret < 0) { |
3794 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3795 | PERROR("chmod"); |
d1613cf5 JN |
3796 | } |
3797 | ||
d6f42150 | 3798 | /* lttng client socket path */ |
996b65c8 | 3799 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3800 | if (ret < 0) { |
d6f42150 | 3801 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3802 | PERROR("chown"); |
d6f42150 DG |
3803 | } |
3804 | ||
3bd1e081 MD |
3805 | /* kconsumer error socket path */ |
3806 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3807 | if (ret < 0) { |
3bd1e081 | 3808 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3809 | PERROR("chown"); |
3bd1e081 MD |
3810 | } |
3811 | ||
7753dea8 MD |
3812 | /* 64-bit ustconsumer error socket path */ |
3813 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3814 | if (ret < 0) { | |
3815 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3816 | PERROR("chown"); |
7753dea8 MD |
3817 | } |
3818 | ||
3819 | /* 32-bit ustconsumer compat32 error socket path */ | |
3820 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3821 | if (ret < 0) { |
7753dea8 | 3822 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3823 | PERROR("chown"); |
fac6795d DG |
3824 | } |
3825 | ||
d6f42150 | 3826 | DBG("All permissions are set"); |
e07ae692 | 3827 | |
fac6795d DG |
3828 | end: |
3829 | return ret; | |
3830 | } | |
3831 | ||
d6f42150 | 3832 | /* |
d063d709 | 3833 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3834 | */ |
67e40797 | 3835 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3836 | { |
3837 | int ret; | |
3838 | ||
67e40797 DG |
3839 | DBG3("Creating LTTng run directory: %s", rundir); |
3840 | ||
d1613cf5 | 3841 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3842 | if (ret < 0) { |
b1f11e69 | 3843 | if (errno != EEXIST) { |
67e40797 | 3844 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3845 | goto error; |
3846 | } else { | |
3847 | ret = 0; | |
3848 | } | |
d6f42150 DG |
3849 | } |
3850 | ||
3851 | error: | |
3852 | return ret; | |
3853 | } | |
3854 | ||
3855 | /* | |
d063d709 DG |
3856 | * Setup sockets and directory needed by the kconsumerd communication with the |
3857 | * session daemon. | |
d6f42150 | 3858 | */ |
67e40797 DG |
3859 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3860 | const char *rundir) | |
d6f42150 DG |
3861 | { |
3862 | int ret; | |
67e40797 | 3863 | char path[PATH_MAX]; |
d6f42150 | 3864 | |
67e40797 | 3865 | switch (consumer_data->type) { |
7753dea8 | 3866 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3867 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3868 | break; |
3869 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3870 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3871 | break; |
3872 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3873 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3874 | break; |
3875 | default: | |
3876 | ERR("Consumer type unknown"); | |
3877 | ret = -EINVAL; | |
3878 | goto error; | |
d6f42150 DG |
3879 | } |
3880 | ||
67e40797 DG |
3881 | DBG2("Creating consumer directory: %s", path); |
3882 | ||
d1613cf5 | 3883 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3884 | if (ret < 0) { |
6beb2242 | 3885 | if (errno != EEXIST) { |
f11e84c2 | 3886 | PERROR("mkdir"); |
3bd1e081 | 3887 | ERR("Failed to create %s", path); |
6beb2242 DG |
3888 | goto error; |
3889 | } | |
f11e84c2 | 3890 | ret = -1; |
d6f42150 DG |
3891 | } |
3892 | ||
3893 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3894 | consumer_data->err_sock = |
3895 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3896 | if (consumer_data->err_sock < 0) { | |
3897 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3898 | ret = -1; |
3899 | goto error; | |
3900 | } | |
3901 | ||
3902 | /* File permission MUST be 660 */ | |
3bd1e081 | 3903 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3904 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3905 | if (ret < 0) { |
3bd1e081 | 3906 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3907 | PERROR("chmod"); |
d6f42150 DG |
3908 | goto error; |
3909 | } | |
3910 | ||
3911 | error: | |
3912 | return ret; | |
3913 | } | |
3914 | ||
fac6795d | 3915 | /* |
d063d709 | 3916 | * Signal handler for the daemon |
cf3af59e | 3917 | * |
54d01ffb DG |
3918 | * Simply stop all worker threads, leaving main() return gracefully after |
3919 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3920 | */ |
3921 | static void sighandler(int sig) | |
3922 | { | |
3923 | switch (sig) { | |
cf3af59e | 3924 | case SIGPIPE: |
af87c45a | 3925 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3926 | return; |
3927 | case SIGINT: | |
af87c45a | 3928 | DBG("SIGINT caught"); |
cf3af59e MD |
3929 | stop_threads(); |
3930 | break; | |
3931 | case SIGTERM: | |
af87c45a | 3932 | DBG("SIGTERM caught"); |
cf3af59e MD |
3933 | stop_threads(); |
3934 | break; | |
3935 | default: | |
3936 | break; | |
fac6795d | 3937 | } |
fac6795d DG |
3938 | } |
3939 | ||
3940 | /* | |
d063d709 | 3941 | * Setup signal handler for : |
1d4b027a | 3942 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3943 | */ |
1d4b027a | 3944 | static int set_signal_handler(void) |
fac6795d | 3945 | { |
1d4b027a DG |
3946 | int ret = 0; |
3947 | struct sigaction sa; | |
3948 | sigset_t sigset; | |
fac6795d | 3949 | |
1d4b027a | 3950 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3951 | PERROR("sigemptyset"); |
1d4b027a DG |
3952 | return ret; |
3953 | } | |
d6f42150 | 3954 | |
1d4b027a DG |
3955 | sa.sa_handler = sighandler; |
3956 | sa.sa_mask = sigset; | |
3957 | sa.sa_flags = 0; | |
3958 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3959 | PERROR("sigaction"); |
1d4b027a | 3960 | return ret; |
d6f42150 DG |
3961 | } |
3962 | ||
1d4b027a | 3963 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 3964 | PERROR("sigaction"); |
1d4b027a | 3965 | return ret; |
d6f42150 | 3966 | } |
aaf26714 | 3967 | |
1d4b027a | 3968 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 3969 | PERROR("sigaction"); |
1d4b027a | 3970 | return ret; |
8c0faa1d DG |
3971 | } |
3972 | ||
1d4b027a DG |
3973 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3974 | ||
3975 | return ret; | |
fac6795d DG |
3976 | } |
3977 | ||
f3ed775e | 3978 | /* |
d063d709 DG |
3979 | * Set open files limit to unlimited. This daemon can open a large number of |
3980 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3981 | */ |
3982 | static void set_ulimit(void) | |
3983 | { | |
3984 | int ret; | |
3985 | struct rlimit lim; | |
3986 | ||
a88df331 | 3987 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3988 | lim.rlim_cur = 65535; |
3989 | lim.rlim_max = 65535; | |
3990 | ||
3991 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3992 | if (ret < 0) { | |
76d7553f | 3993 | PERROR("failed to set open files limit"); |
f3ed775e DG |
3994 | } |
3995 | } | |
3996 | ||
35f90c40 DG |
3997 | /* |
3998 | * Write pidfile using the rundir and opt_pidfile. | |
3999 | */ | |
4000 | static void write_pidfile(void) | |
4001 | { | |
4002 | int ret; | |
4003 | char pidfile_path[PATH_MAX]; | |
4004 | ||
4005 | assert(rundir); | |
4006 | ||
4007 | if (opt_pidfile) { | |
4008 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4009 | } else { | |
4010 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4011 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4012 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4013 | if (ret < 0) { | |
4014 | PERROR("snprintf pidfile path"); | |
4015 | goto error; | |
4016 | } | |
4017 | } | |
4018 | ||
4019 | /* | |
4020 | * Create pid file in rundir. Return value is of no importance. The | |
4021 | * execution will continue even though we are not able to write the file. | |
4022 | */ | |
4023 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4024 | ||
4025 | error: | |
4026 | return; | |
4027 | } | |
4028 | ||
fac6795d DG |
4029 | /* |
4030 | * main | |
4031 | */ | |
4032 | int main(int argc, char **argv) | |
4033 | { | |
fac6795d DG |
4034 | int ret = 0; |
4035 | void *status; | |
ae9e45b3 | 4036 | const char *home_path, *env_app_timeout; |
fac6795d | 4037 | |
335a95b7 MD |
4038 | init_kernel_workarounds(); |
4039 | ||
f6a9efaa DG |
4040 | rcu_register_thread(); |
4041 | ||
7753dea8 | 4042 | setup_consumerd_path(); |
fb09408a | 4043 | |
12744796 DG |
4044 | page_size = sysconf(_SC_PAGESIZE); |
4045 | if (page_size < 0) { | |
4046 | PERROR("sysconf _SC_PAGESIZE"); | |
4047 | page_size = LONG_MAX; | |
4048 | WARN("Fallback page size to %ld", page_size); | |
4049 | } | |
4050 | ||
fac6795d DG |
4051 | /* Parse arguments */ |
4052 | progname = argv[0]; | |
c617c0c6 | 4053 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 4054 | goto error; |
fac6795d DG |
4055 | } |
4056 | ||
4057 | /* Daemonize */ | |
4058 | if (opt_daemon) { | |
ceed52b5 MD |
4059 | int i; |
4060 | ||
4061 | /* | |
4062 | * fork | |
4063 | * child: setsid, close FD 0, 1, 2, chdir / | |
4064 | * parent: exit (if fork is successful) | |
4065 | */ | |
53094c05 DG |
4066 | ret = daemon(0, 0); |
4067 | if (ret < 0) { | |
76d7553f | 4068 | PERROR("daemon"); |
cf3af59e | 4069 | goto error; |
53094c05 | 4070 | } |
ceed52b5 MD |
4071 | /* |
4072 | * We are in the child. Make sure all other file | |
4073 | * descriptors are closed, in case we are called with | |
4074 | * more opened file descriptors than the standard ones. | |
4075 | */ | |
4076 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4077 | (void) close(i); | |
4078 | } | |
4079 | } | |
4080 | ||
4081 | /* Create thread quit pipe */ | |
4082 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4083 | goto error; | |
fac6795d DG |
4084 | } |
4085 | ||
4086 | /* Check if daemon is UID = 0 */ | |
4087 | is_root = !getuid(); | |
4088 | ||
fac6795d | 4089 | if (is_root) { |
990570ed | 4090 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4091 | |
4092 | /* Create global run dir with root access */ | |
4093 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4094 | if (ret < 0) { |
cf3af59e | 4095 | goto error; |
d6f42150 DG |
4096 | } |
4097 | ||
fac6795d | 4098 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4099 | snprintf(apps_unix_sock_path, PATH_MAX, |
4100 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4101 | } |
4102 | ||
4103 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4104 | snprintf(client_unix_sock_path, PATH_MAX, |
4105 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4106 | } | |
0fdd1e2c DG |
4107 | |
4108 | /* Set global SHM for ust */ | |
4109 | if (strlen(wait_shm_path) == 0) { | |
4110 | snprintf(wait_shm_path, PATH_MAX, | |
4111 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4112 | } | |
67e40797 | 4113 | |
44a5e5eb DG |
4114 | if (strlen(health_unix_sock_path) == 0) { |
4115 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4116 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4117 | } | |
4118 | ||
67e40797 DG |
4119 | /* Setup kernel consumerd path */ |
4120 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4121 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4122 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4123 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4124 | |
4125 | DBG2("Kernel consumer err path: %s", | |
4126 | kconsumer_data.err_unix_sock_path); | |
4127 | DBG2("Kernel consumer cmd path: %s", | |
4128 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4129 | } else { |
b082db07 DG |
4130 | home_path = get_home_dir(); |
4131 | if (home_path == NULL) { | |
273ea72c DG |
4132 | /* TODO: Add --socket PATH option */ |
4133 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4134 | ret = -EPERM; |
4135 | goto error; | |
b082db07 DG |
4136 | } |
4137 | ||
67e40797 DG |
4138 | /* |
4139 | * Create rundir from home path. This will create something like | |
4140 | * $HOME/.lttng | |
4141 | */ | |
990570ed | 4142 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4143 | if (ret < 0) { |
4144 | ret = -ENOMEM; | |
4145 | goto error; | |
4146 | } | |
4147 | ||
4148 | ret = create_lttng_rundir(rundir); | |
4149 | if (ret < 0) { | |
4150 | goto error; | |
4151 | } | |
4152 | ||
fac6795d | 4153 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4154 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4155 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4156 | } |
4157 | ||
4158 | /* Set the cli tool unix socket path */ | |
4159 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4160 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4161 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4162 | } |
0fdd1e2c DG |
4163 | |
4164 | /* Set global SHM for ust */ | |
4165 | if (strlen(wait_shm_path) == 0) { | |
4166 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4167 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4168 | } |
44a5e5eb DG |
4169 | |
4170 | /* Set health check Unix path */ | |
4171 | if (strlen(health_unix_sock_path) == 0) { | |
4172 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4173 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4174 | } | |
fac6795d DG |
4175 | } |
4176 | ||
5c827ce0 DG |
4177 | /* Set consumer initial state */ |
4178 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4179 | ust_consumerd_state = CONSUMER_STOPPED; | |
4180 | ||
847177cd DG |
4181 | DBG("Client socket path %s", client_unix_sock_path); |
4182 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4183 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4184 | DBG("LTTng run directory path: %s", rundir); |
4185 | ||
4186 | /* 32 bits consumerd path setup */ | |
4187 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4188 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4189 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4190 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4191 | |
4192 | DBG2("UST consumer 32 bits err path: %s", | |
4193 | ustconsumer32_data.err_unix_sock_path); | |
4194 | DBG2("UST consumer 32 bits cmd path: %s", | |
4195 | ustconsumer32_data.cmd_unix_sock_path); | |
4196 | ||
4197 | /* 64 bits consumerd path setup */ | |
4198 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4199 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4200 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4201 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4202 | |
4203 | DBG2("UST consumer 64 bits err path: %s", | |
4204 | ustconsumer64_data.err_unix_sock_path); | |
4205 | DBG2("UST consumer 64 bits cmd path: %s", | |
4206 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4207 | |
273ea72c | 4208 | /* |
7d8234d9 | 4209 | * See if daemon already exist. |
fac6795d | 4210 | */ |
7d8234d9 | 4211 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4212 | ERR("Already running daemon.\n"); |
273ea72c | 4213 | /* |
cf3af59e MD |
4214 | * We do not goto exit because we must not cleanup() |
4215 | * because a daemon is already running. | |
ab118b20 | 4216 | */ |
cf3af59e | 4217 | goto error; |
a88df331 DG |
4218 | } |
4219 | ||
1427f9b2 DG |
4220 | /* |
4221 | * Init UST app hash table. Alloc hash table before this point since | |
4222 | * cleanup() can get called after that point. | |
4223 | */ | |
4224 | ust_app_ht_alloc(); | |
4225 | ||
54d01ffb | 4226 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4227 | |
4228 | /* | |
4229 | * These actions must be executed as root. We do that *after* setting up | |
4230 | * the sockets path because we MUST make the check for another daemon using | |
4231 | * those paths *before* trying to set the kernel consumer sockets and init | |
4232 | * kernel tracer. | |
4233 | */ | |
4234 | if (is_root) { | |
67e40797 | 4235 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4236 | if (ret < 0) { |
4237 | goto exit; | |
4238 | } | |
4239 | ||
a88df331 | 4240 | /* Setup kernel tracer */ |
4fba7219 DG |
4241 | if (!opt_no_kernel) { |
4242 | init_kernel_tracer(); | |
4243 | } | |
a88df331 DG |
4244 | |
4245 | /* Set ulimit for open files */ | |
4246 | set_ulimit(); | |
fac6795d | 4247 | } |
4063050c MD |
4248 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4249 | lttng_fd_init(); | |
fac6795d | 4250 | |
67e40797 DG |
4251 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4252 | if (ret < 0) { | |
4253 | goto exit; | |
4254 | } | |
4255 | ||
4256 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4257 | if (ret < 0) { | |
4258 | goto exit; | |
4259 | } | |
4260 | ||
cf3af59e MD |
4261 | if ((ret = set_signal_handler()) < 0) { |
4262 | goto exit; | |
fac6795d DG |
4263 | } |
4264 | ||
d6f42150 | 4265 | /* Setup the needed unix socket */ |
cf3af59e MD |
4266 | if ((ret = init_daemon_socket()) < 0) { |
4267 | goto exit; | |
fac6795d DG |
4268 | } |
4269 | ||
4270 | /* Set credentials to socket */ | |
be040666 | 4271 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4272 | goto exit; |
fac6795d DG |
4273 | } |
4274 | ||
5b8719f5 DG |
4275 | /* Get parent pid if -S, --sig-parent is specified. */ |
4276 | if (opt_sig_parent) { | |
4277 | ppid = getppid(); | |
4278 | } | |
4279 | ||
7a485870 | 4280 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4281 | if (is_root && !opt_no_kernel) { |
4282 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4283 | goto exit; | |
4284 | } | |
7a485870 DG |
4285 | } |
4286 | ||
099e26bd | 4287 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4288 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4289 | goto exit; |
4290 | } | |
4291 | ||
d0b96690 DG |
4292 | /* Setup the thread apps notify communication pipe. */ |
4293 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4294 | goto exit; | |
4295 | } | |
4296 | ||
7972aab2 DG |
4297 | /* Initialize global buffer per UID and PID registry. */ |
4298 | buffer_reg_init_uid_registry(); | |
4299 | buffer_reg_init_pid_registry(); | |
4300 | ||
099e26bd DG |
4301 | /* Init UST command queue. */ |
4302 | cds_wfq_init(&ust_cmd_queue.queue); | |
4303 | ||
273ea72c | 4304 | /* |
54d01ffb DG |
4305 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4306 | * statically declared in session.c | |
273ea72c | 4307 | */ |
54d01ffb | 4308 | session_list_ptr = session_get_list(); |
b5541356 | 4309 | |
5eb91c98 DG |
4310 | /* Set up max poll set size */ |
4311 | lttng_poll_set_max_size(); | |
4312 | ||
2f77fc4b | 4313 | cmd_init(); |
00e2e675 | 4314 | |
ae9e45b3 DG |
4315 | /* Check for the application socket timeout env variable. */ |
4316 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4317 | if (env_app_timeout) { | |
4318 | app_socket_timeout = atoi(env_app_timeout); | |
4319 | } else { | |
4320 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4321 | } | |
4322 | ||
35f90c40 DG |
4323 | write_pidfile(); |
4324 | ||
44a5e5eb DG |
4325 | /* Create thread to manage the client socket */ |
4326 | ret = pthread_create(&health_thread, NULL, | |
4327 | thread_manage_health, (void *) NULL); | |
4328 | if (ret != 0) { | |
4329 | PERROR("pthread_create health"); | |
4330 | goto exit_health; | |
4331 | } | |
4332 | ||
cf3af59e | 4333 | /* Create thread to manage the client socket */ |
099e26bd DG |
4334 | ret = pthread_create(&client_thread, NULL, |
4335 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4336 | if (ret != 0) { |
76d7553f | 4337 | PERROR("pthread_create clients"); |
cf3af59e MD |
4338 | goto exit_client; |
4339 | } | |
fac6795d | 4340 | |
099e26bd DG |
4341 | /* Create thread to dispatch registration */ |
4342 | ret = pthread_create(&dispatch_thread, NULL, | |
4343 | thread_dispatch_ust_registration, (void *) NULL); | |
4344 | if (ret != 0) { | |
76d7553f | 4345 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4346 | goto exit_dispatch; |
4347 | } | |
4348 | ||
4349 | /* Create thread to manage application registration. */ | |
4350 | ret = pthread_create(®_apps_thread, NULL, | |
4351 | thread_registration_apps, (void *) NULL); | |
4352 | if (ret != 0) { | |
76d7553f | 4353 | PERROR("pthread_create registration"); |
099e26bd DG |
4354 | goto exit_reg_apps; |
4355 | } | |
4356 | ||
cf3af59e | 4357 | /* Create thread to manage application socket */ |
54d01ffb DG |
4358 | ret = pthread_create(&apps_thread, NULL, |
4359 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4360 | if (ret != 0) { |
d0b96690 DG |
4361 | PERROR("pthread_create apps"); |
4362 | goto exit_apps; | |
4363 | } | |
4364 | ||
4365 | /* Create thread to manage application notify socket */ | |
4366 | ret = pthread_create(&apps_notify_thread, NULL, | |
4367 | ust_thread_manage_notify, (void *) NULL); | |
4368 | if (ret != 0) { | |
76d7553f | 4369 | PERROR("pthread_create apps"); |
cf3af59e MD |
4370 | goto exit_apps; |
4371 | } | |
fac6795d | 4372 | |
6620da75 DG |
4373 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4374 | if (is_root && !opt_no_kernel) { | |
4375 | /* Create kernel thread to manage kernel event */ | |
4376 | ret = pthread_create(&kernel_thread, NULL, | |
4377 | thread_manage_kernel, (void *) NULL); | |
4378 | if (ret != 0) { | |
4379 | PERROR("pthread_create kernel"); | |
4380 | goto exit_kernel; | |
4381 | } | |
7a485870 | 4382 | |
6620da75 DG |
4383 | ret = pthread_join(kernel_thread, &status); |
4384 | if (ret != 0) { | |
4385 | PERROR("pthread_join"); | |
4386 | goto error; /* join error, exit without cleanup */ | |
4387 | } | |
fac6795d DG |
4388 | } |
4389 | ||
cf3af59e MD |
4390 | exit_kernel: |
4391 | ret = pthread_join(apps_thread, &status); | |
4392 | if (ret != 0) { | |
76d7553f | 4393 | PERROR("pthread_join"); |
cf3af59e MD |
4394 | goto error; /* join error, exit without cleanup */ |
4395 | } | |
fac6795d | 4396 | |
cf3af59e | 4397 | exit_apps: |
099e26bd DG |
4398 | ret = pthread_join(reg_apps_thread, &status); |
4399 | if (ret != 0) { | |
76d7553f | 4400 | PERROR("pthread_join"); |
099e26bd DG |
4401 | goto error; /* join error, exit without cleanup */ |
4402 | } | |
4403 | ||
4404 | exit_reg_apps: | |
4405 | ret = pthread_join(dispatch_thread, &status); | |
4406 | if (ret != 0) { | |
76d7553f | 4407 | PERROR("pthread_join"); |
099e26bd DG |
4408 | goto error; /* join error, exit without cleanup */ |
4409 | } | |
4410 | ||
4411 | exit_dispatch: | |
cf3af59e MD |
4412 | ret = pthread_join(client_thread, &status); |
4413 | if (ret != 0) { | |
76d7553f | 4414 | PERROR("pthread_join"); |
cf3af59e MD |
4415 | goto error; /* join error, exit without cleanup */ |
4416 | } | |
4417 | ||
3bd1e081 | 4418 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4419 | if (ret != 0) { |
76d7553f | 4420 | PERROR("join_consumer"); |
cf3af59e MD |
4421 | goto error; /* join error, exit without cleanup */ |
4422 | } | |
a88df331 | 4423 | |
06f525de DG |
4424 | ret = join_consumer_thread(&ustconsumer32_data); |
4425 | if (ret != 0) { | |
4426 | PERROR("join_consumer ust32"); | |
4427 | goto error; /* join error, exit without cleanup */ | |
4428 | } | |
4429 | ||
4430 | ret = join_consumer_thread(&ustconsumer64_data); | |
4431 | if (ret != 0) { | |
4432 | PERROR("join_consumer ust64"); | |
4433 | goto error; /* join error, exit without cleanup */ | |
4434 | } | |
4435 | ||
cf3af59e | 4436 | exit_client: |
06f525de DG |
4437 | ret = pthread_join(health_thread, &status); |
4438 | if (ret != 0) { | |
4439 | PERROR("pthread_join health thread"); | |
4440 | goto error; /* join error, exit without cleanup */ | |
4441 | } | |
4442 | ||
44a5e5eb | 4443 | exit_health: |
a88df331 | 4444 | exit: |
cf3af59e MD |
4445 | /* |
4446 | * cleanup() is called when no other thread is running. | |
4447 | */ | |
f6a9efaa | 4448 | rcu_thread_online(); |
cf3af59e | 4449 | cleanup(); |
f6a9efaa DG |
4450 | rcu_thread_offline(); |
4451 | rcu_unregister_thread(); | |
67e40797 | 4452 | if (!ret) { |
cf3af59e | 4453 | exit(EXIT_SUCCESS); |
67e40797 | 4454 | } |
cf3af59e | 4455 | error: |
5e16da05 | 4456 | exit(EXIT_FAILURE); |
fac6795d | 4457 | } |