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; |
0b2dc8df | 164 | static pthread_t ht_cleanup_thread; |
5eb91c98 | 165 | |
099e26bd DG |
166 | /* |
167 | * UST registration command queue. This queue is tied with a futex and uses a N | |
168 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
169 | * | |
170 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
171 | * this queue and the wait/wake scheme. | |
172 | */ | |
173 | static struct ust_cmd_queue ust_cmd_queue; | |
174 | ||
b5541356 DG |
175 | /* |
176 | * Pointer initialized before thread creation. | |
177 | * | |
178 | * This points to the tracing session list containing the session count and a | |
179 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
180 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 181 | * |
d063d709 | 182 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 183 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
184 | */ |
185 | static struct ltt_session_list *session_list_ptr; | |
186 | ||
7753dea8 MD |
187 | int ust_consumerd64_fd = -1; |
188 | int ust_consumerd32_fd = -1; | |
189 | ||
fb6f1fa2 YB |
190 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
191 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
192 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
193 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 194 | |
2f77fc4b DG |
195 | static const char *module_proc_lttng = "/proc/lttng"; |
196 | ||
5c827ce0 DG |
197 | /* |
198 | * Consumer daemon state which is changed when spawning it, killing it or in | |
199 | * case of a fatal error. | |
200 | */ | |
201 | enum consumerd_state { | |
202 | CONSUMER_STARTED = 1, | |
203 | CONSUMER_STOPPED = 2, | |
204 | CONSUMER_ERROR = 3, | |
205 | }; | |
206 | ||
207 | /* | |
208 | * This consumer daemon state is used to validate if a client command will be | |
209 | * able to reach the consumer. If not, the client is informed. For instance, | |
210 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
211 | * error to the client. | |
212 | * | |
213 | * The following example shows a possible race condition of this scheme: | |
214 | * | |
215 | * consumer thread error happens | |
216 | * client cmd arrives | |
217 | * client cmd checks state -> still OK | |
218 | * consumer thread exit, sets error | |
219 | * client cmd try to talk to consumer | |
220 | * ... | |
221 | * | |
222 | * However, since the consumer is a different daemon, we have no way of making | |
223 | * sure the command will reach it safely even with this state flag. This is why | |
224 | * we consider that up to the state validation during command processing, the | |
225 | * command is safe. After that, we can not guarantee the correctness of the | |
226 | * client request vis-a-vis the consumer. | |
227 | */ | |
228 | static enum consumerd_state ust_consumerd_state; | |
229 | static enum consumerd_state kernel_consumerd_state; | |
230 | ||
ae9e45b3 DG |
231 | /* |
232 | * Socket timeout for receiving and sending in seconds. | |
233 | */ | |
234 | static int app_socket_timeout; | |
235 | ||
12744796 DG |
236 | /* Set in main() with the current page size. */ |
237 | long page_size; | |
238 | ||
76f3e2db DG |
239 | /* If set to nonzero, spawn the consumer with valgrind. */ |
240 | static int consumer_debug_valgrind; | |
241 | ||
fb09408a | 242 | static |
7753dea8 | 243 | void setup_consumerd_path(void) |
fb09408a | 244 | { |
fc7a59ce | 245 | const char *bin, *libdir; |
fb09408a | 246 | |
7753dea8 MD |
247 | /* |
248 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
249 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
250 | * has not been defined. | |
7753dea8 | 251 | */ |
ebaeda94 | 252 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
253 | if (!consumerd32_bin[0]) { |
254 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
255 | } |
256 | if (!consumerd32_libdir[0]) { | |
257 | consumerd32_libdir = INSTALL_LIB_PATH; | |
258 | } | |
259 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
260 | if (!consumerd64_bin[0]) { |
261 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 262 | } |
ebaeda94 MD |
263 | if (!consumerd64_libdir[0]) { |
264 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
265 | } |
266 | #else | |
267 | #error "Unknown bitness" | |
268 | #endif | |
269 | ||
fb09408a MD |
270 | /* |
271 | * runtime env. var. overrides the build default. | |
272 | */ | |
fc7a59ce AM |
273 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
274 | if (bin) { | |
275 | consumerd32_bin = bin; | |
7753dea8 | 276 | } |
fc7a59ce AM |
277 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
278 | if (bin) { | |
279 | consumerd64_bin = bin; | |
ebaeda94 | 280 | } |
72f579ee | 281 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
282 | if (libdir) { |
283 | consumerd32_libdir = libdir; | |
284 | } | |
72f579ee | 285 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
286 | if (libdir) { |
287 | consumerd64_libdir = libdir; | |
fb09408a MD |
288 | } |
289 | } | |
290 | ||
5eb91c98 DG |
291 | /* |
292 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
293 | */ | |
d0b96690 | 294 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
295 | { |
296 | int ret; | |
297 | ||
d0b96690 | 298 | assert(events); |
5eb91c98 DG |
299 | |
300 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
301 | if (ret < 0) { | |
302 | goto error; | |
303 | } | |
304 | ||
305 | /* Add quit pipe */ | |
d0b96690 | 306 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
307 | if (ret < 0) { |
308 | goto error; | |
309 | } | |
310 | ||
311 | return 0; | |
312 | ||
313 | error: | |
314 | return ret; | |
315 | } | |
316 | ||
317 | /* | |
318 | * Check if the thread quit pipe was triggered. | |
319 | * | |
320 | * Return 1 if it was triggered else 0; | |
321 | */ | |
d0b96690 | 322 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
323 | { |
324 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
325 | return 1; | |
326 | } | |
327 | ||
328 | return 0; | |
329 | } | |
330 | ||
0fdd1e2c DG |
331 | /* |
332 | * Return group ID of the tracing group or -1 if not found. | |
333 | */ | |
996b65c8 MD |
334 | static gid_t allowed_group(void) |
335 | { | |
336 | struct group *grp; | |
337 | ||
274e143b MD |
338 | if (opt_tracing_group) { |
339 | grp = getgrnam(opt_tracing_group); | |
340 | } else { | |
341 | grp = getgrnam(default_tracing_group); | |
342 | } | |
996b65c8 MD |
343 | if (!grp) { |
344 | return -1; | |
345 | } else { | |
346 | return grp->gr_gid; | |
347 | } | |
348 | } | |
349 | ||
273ea72c | 350 | /* |
5eb91c98 | 351 | * Init thread quit pipe. |
273ea72c DG |
352 | * |
353 | * Return -1 on error or 0 if all pipes are created. | |
354 | */ | |
355 | static int init_thread_quit_pipe(void) | |
356 | { | |
730389d9 | 357 | int ret, i; |
273ea72c | 358 | |
730389d9 | 359 | ret = pipe(thread_quit_pipe); |
273ea72c | 360 | if (ret < 0) { |
730389d9 | 361 | PERROR("thread quit pipe"); |
273ea72c DG |
362 | goto error; |
363 | } | |
364 | ||
730389d9 DG |
365 | for (i = 0; i < 2; i++) { |
366 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
367 | if (ret < 0) { | |
368 | PERROR("fcntl"); | |
369 | goto error; | |
370 | } | |
371 | } | |
372 | ||
273ea72c DG |
373 | error: |
374 | return ret; | |
375 | } | |
376 | ||
099e26bd DG |
377 | /* |
378 | * Stop all threads by closing the thread quit pipe. | |
379 | */ | |
cf3af59e MD |
380 | static void stop_threads(void) |
381 | { | |
5eb91c98 DG |
382 | int ret; |
383 | ||
cf3af59e MD |
384 | /* Stopping all threads */ |
385 | DBG("Terminating all threads"); | |
54d01ffb | 386 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
387 | if (ret < 0) { |
388 | ERR("write error on thread quit pipe"); | |
389 | } | |
390 | ||
099e26bd | 391 | /* Dispatch thread */ |
26c9d55e | 392 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 393 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
394 | } |
395 | ||
fac6795d | 396 | /* |
d063d709 | 397 | * Cleanup the daemon |
fac6795d | 398 | */ |
cf3af59e | 399 | static void cleanup(void) |
fac6795d | 400 | { |
ef599319 | 401 | int ret; |
6620da75 | 402 | char *cmd = NULL; |
af9737e9 | 403 | struct ltt_session *sess, *stmp; |
fac6795d | 404 | |
1d4b027a | 405 | DBG("Cleaning up"); |
e07ae692 | 406 | |
2f77fc4b DG |
407 | /* First thing first, stop all threads */ |
408 | utils_close_pipe(thread_quit_pipe); | |
409 | ||
35f90c40 DG |
410 | /* |
411 | * If opt_pidfile is undefined, the default file will be wiped when | |
412 | * removing the rundir. | |
413 | */ | |
414 | if (opt_pidfile) { | |
415 | ret = remove(opt_pidfile); | |
416 | if (ret < 0) { | |
417 | PERROR("remove pidfile %s", opt_pidfile); | |
418 | } | |
419 | } | |
420 | ||
67e40797 DG |
421 | DBG("Removing %s directory", rundir); |
422 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
423 | if (ret < 0) { | |
424 | ERR("asprintf failed. Something is really wrong!"); | |
425 | } | |
5461b305 | 426 | |
67e40797 DG |
427 | /* Remove lttng run directory */ |
428 | ret = system(cmd); | |
429 | if (ret < 0) { | |
430 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 431 | } |
67e40797 | 432 | free(cmd); |
bd69add2 | 433 | free(rundir); |
5461b305 | 434 | |
99bab54f | 435 | DBG("Cleaning up all sessions"); |
fac6795d | 436 | |
b5541356 | 437 | /* Destroy session list mutex */ |
273ea72c DG |
438 | if (session_list_ptr != NULL) { |
439 | pthread_mutex_destroy(&session_list_ptr->lock); | |
440 | ||
441 | /* Cleanup ALL session */ | |
54d01ffb DG |
442 | cds_list_for_each_entry_safe(sess, stmp, |
443 | &session_list_ptr->head, list) { | |
2f77fc4b | 444 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
445 | } |
446 | } | |
447 | ||
099e26bd | 448 | DBG("Closing all UST sockets"); |
56fff090 | 449 | ust_app_clean_list(); |
7972aab2 | 450 | buffer_reg_destroy_registries(); |
099e26bd | 451 | |
4fba7219 DG |
452 | if (is_root && !opt_no_kernel) { |
453 | DBG2("Closing kernel fd"); | |
a4b35e07 | 454 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
455 | ret = close(kernel_tracer_fd); |
456 | if (ret) { | |
457 | PERROR("close"); | |
458 | } | |
a4b35e07 | 459 | } |
2f50c8a3 | 460 | DBG("Unloading kernel modules"); |
096102bd | 461 | modprobe_remove_lttng_all(); |
2f50c8a3 | 462 | } |
2f77fc4b | 463 | |
421cb601 | 464 | /* <fun> */ |
f56a39af | 465 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
466 | "Matthew, BEET driven development works!%c[%dm", |
467 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
468 | /* </fun> */ | |
fac6795d DG |
469 | } |
470 | ||
e065084a | 471 | /* |
d063d709 | 472 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 473 | * |
d063d709 | 474 | * Return lttcomm error code. |
e065084a DG |
475 | */ |
476 | static int send_unix_sock(int sock, void *buf, size_t len) | |
477 | { | |
478 | /* Check valid length */ | |
c617c0c6 | 479 | if (len == 0) { |
e065084a DG |
480 | return -1; |
481 | } | |
482 | ||
483 | return lttcomm_send_unix_sock(sock, buf, len); | |
484 | } | |
485 | ||
5461b305 | 486 | /* |
d063d709 | 487 | * Free memory of a command context structure. |
5461b305 | 488 | */ |
a2fb29a5 | 489 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 490 | { |
a2fb29a5 DG |
491 | DBG("Clean command context structure"); |
492 | if (*cmd_ctx) { | |
493 | if ((*cmd_ctx)->llm) { | |
494 | free((*cmd_ctx)->llm); | |
5461b305 | 495 | } |
a2fb29a5 DG |
496 | if ((*cmd_ctx)->lsm) { |
497 | free((*cmd_ctx)->lsm); | |
5461b305 | 498 | } |
a2fb29a5 DG |
499 | free(*cmd_ctx); |
500 | *cmd_ctx = NULL; | |
5461b305 DG |
501 | } |
502 | } | |
503 | ||
fac6795d | 504 | /* |
0fdd1e2c | 505 | * Notify UST applications using the shm mmap futex. |
fac6795d | 506 | */ |
0fdd1e2c | 507 | static int notify_ust_apps(int active) |
fac6795d | 508 | { |
0fdd1e2c | 509 | char *wait_shm_mmap; |
fac6795d | 510 | |
0fdd1e2c | 511 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 512 | |
0fdd1e2c DG |
513 | /* See shm.c for this call implying mmap, shm and futex calls */ |
514 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
515 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
516 | goto error; |
517 | } | |
518 | ||
0fdd1e2c DG |
519 | /* Wake waiting process */ |
520 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
521 | ||
522 | /* Apps notified successfully */ | |
523 | return 0; | |
fac6795d DG |
524 | |
525 | error: | |
0fdd1e2c | 526 | return -1; |
fac6795d DG |
527 | } |
528 | ||
e065084a | 529 | /* |
d063d709 DG |
530 | * Setup the outgoing data buffer for the response (llm) by allocating the |
531 | * right amount of memory and copying the original information from the lsm | |
532 | * structure. | |
ca95a216 | 533 | * |
d063d709 | 534 | * Return total size of the buffer pointed by buf. |
ca95a216 | 535 | */ |
5461b305 | 536 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 537 | { |
f3ed775e | 538 | int ret, buf_size; |
ca95a216 | 539 | |
f3ed775e | 540 | buf_size = size; |
5461b305 | 541 | |
ba7f0ae5 | 542 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 543 | if (cmd_ctx->llm == NULL) { |
76d7553f | 544 | PERROR("zmalloc"); |
5461b305 | 545 | ret = -ENOMEM; |
ca95a216 DG |
546 | goto error; |
547 | } | |
548 | ||
5461b305 DG |
549 | /* Copy common data */ |
550 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 551 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 552 | |
5461b305 DG |
553 | cmd_ctx->llm->data_size = size; |
554 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
555 | ||
ca95a216 DG |
556 | return buf_size; |
557 | ||
558 | error: | |
559 | return ret; | |
560 | } | |
561 | ||
7a485870 | 562 | /* |
5eb91c98 | 563 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 564 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 565 | */ |
5eb91c98 | 566 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 567 | { |
5eb91c98 | 568 | int ret; |
7a485870 DG |
569 | struct ltt_session *session; |
570 | struct ltt_kernel_channel *channel; | |
571 | ||
5eb91c98 | 572 | DBG("Updating kernel poll set"); |
7a485870 | 573 | |
54d01ffb | 574 | session_lock_list(); |
b5541356 | 575 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 576 | session_lock(session); |
7a485870 | 577 | if (session->kernel_session == NULL) { |
54d01ffb | 578 | session_unlock(session); |
7a485870 DG |
579 | continue; |
580 | } | |
7a485870 | 581 | |
54d01ffb DG |
582 | cds_list_for_each_entry(channel, |
583 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
584 | /* Add channel fd to the kernel poll set */ |
585 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
586 | if (ret < 0) { | |
54d01ffb | 587 | session_unlock(session); |
5eb91c98 DG |
588 | goto error; |
589 | } | |
590 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 591 | } |
54d01ffb | 592 | session_unlock(session); |
7a485870 | 593 | } |
54d01ffb | 594 | session_unlock_list(); |
7a485870 | 595 | |
5eb91c98 | 596 | return 0; |
7a485870 DG |
597 | |
598 | error: | |
54d01ffb | 599 | session_unlock_list(); |
7a485870 DG |
600 | return -1; |
601 | } | |
602 | ||
603 | /* | |
54d01ffb | 604 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 605 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 606 | * |
d063d709 | 607 | * Useful for CPU hotplug feature. |
7a485870 | 608 | */ |
2bdd86d4 | 609 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
610 | { |
611 | int ret = 0; | |
612 | struct ltt_session *session; | |
173af62f | 613 | struct ltt_kernel_session *ksess; |
7a485870 DG |
614 | struct ltt_kernel_channel *channel; |
615 | ||
616 | DBG("Updating kernel streams for channel fd %d", fd); | |
617 | ||
54d01ffb | 618 | session_lock_list(); |
b5541356 | 619 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 620 | session_lock(session); |
7a485870 | 621 | if (session->kernel_session == NULL) { |
54d01ffb | 622 | session_unlock(session); |
7a485870 DG |
623 | continue; |
624 | } | |
173af62f | 625 | ksess = session->kernel_session; |
d9800920 | 626 | |
173af62f | 627 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
628 | if (channel->fd == fd) { |
629 | DBG("Channel found, updating kernel streams"); | |
630 | ret = kernel_open_channel_stream(channel); | |
631 | if (ret < 0) { | |
b3c750d2 | 632 | goto error; |
7a485870 | 633 | } |
d9800920 | 634 | |
7a485870 | 635 | /* |
5eb91c98 DG |
636 | * Have we already sent fds to the consumer? If yes, it means |
637 | * that tracing is started so it is safe to send our updated | |
638 | * stream fds. | |
7a485870 | 639 | */ |
173af62f DG |
640 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
641 | struct lttng_ht_iter iter; | |
642 | struct consumer_socket *socket; | |
643 | ||
e7fe706f | 644 | rcu_read_lock(); |
173af62f DG |
645 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
646 | &iter.iter, socket, node.node) { | |
647 | /* Code flow error */ | |
648 | assert(socket->fd >= 0); | |
649 | ||
650 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 651 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
652 | channel, ksess, |
653 | session->output_traces ? 1 : 0); | |
173af62f DG |
654 | pthread_mutex_unlock(socket->lock); |
655 | if (ret < 0) { | |
e7fe706f | 656 | rcu_read_unlock(); |
173af62f DG |
657 | goto error; |
658 | } | |
7a485870 | 659 | } |
e7fe706f | 660 | rcu_read_unlock(); |
7a485870 | 661 | } |
b3c750d2 | 662 | goto error; |
7a485870 DG |
663 | } |
664 | } | |
54d01ffb | 665 | session_unlock(session); |
7a485870 | 666 | } |
54d01ffb | 667 | session_unlock_list(); |
b3c750d2 | 668 | return ret; |
7a485870 | 669 | |
b3c750d2 | 670 | error: |
54d01ffb DG |
671 | session_unlock(session); |
672 | session_unlock_list(); | |
7a485870 DG |
673 | return ret; |
674 | } | |
675 | ||
487cf67c | 676 | /* |
ffe60014 DG |
677 | * For each tracing session, update newly registered apps. The session list |
678 | * lock MUST be acquired before calling this. | |
487cf67c DG |
679 | */ |
680 | static void update_ust_app(int app_sock) | |
681 | { | |
682 | struct ltt_session *sess, *stmp; | |
683 | ||
684 | /* For all tracing session(s) */ | |
685 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 686 | session_lock(sess); |
421cb601 DG |
687 | if (sess->ust_session) { |
688 | ust_app_global_update(sess->ust_session, app_sock); | |
689 | } | |
4ee14516 | 690 | session_unlock(sess); |
487cf67c DG |
691 | } |
692 | } | |
693 | ||
7a485870 | 694 | /* |
d063d709 | 695 | * This thread manage event coming from the kernel. |
7a485870 | 696 | * |
d063d709 DG |
697 | * Features supported in this thread: |
698 | * -) CPU Hotplug | |
7a485870 DG |
699 | */ |
700 | static void *thread_manage_kernel(void *data) | |
701 | { | |
139ac872 | 702 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 703 | uint32_t revents, nb_fd; |
7a485870 | 704 | char tmp; |
5eb91c98 | 705 | struct lttng_poll_event events; |
7a485870 | 706 | |
6993eeb3 | 707 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 708 | |
927ca06a DG |
709 | health_register(HEALTH_TYPE_KERNEL); |
710 | ||
d5d63bf1 DG |
711 | /* |
712 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 713 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 714 | */ |
6d737ce4 | 715 | lttng_poll_init(&events); |
d5d63bf1 | 716 | |
6993eeb3 CB |
717 | if (testpoint(thread_manage_kernel)) { |
718 | goto error_testpoint; | |
719 | } | |
8ac94142 | 720 | |
840cb59c | 721 | health_code_update(); |
44a5e5eb | 722 | |
6993eeb3 | 723 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 724 | goto error_testpoint; |
6993eeb3 CB |
725 | } |
726 | ||
7a485870 | 727 | while (1) { |
840cb59c | 728 | health_code_update(); |
44a5e5eb | 729 | |
7a485870 | 730 | if (update_poll_flag == 1) { |
d21b0d71 DG |
731 | /* Clean events object. We are about to populate it again. */ |
732 | lttng_poll_clean(&events); | |
733 | ||
d0b96690 | 734 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
735 | if (ret < 0) { |
736 | goto error_poll_create; | |
737 | } | |
738 | ||
739 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
740 | if (ret < 0) { | |
741 | goto error; | |
742 | } | |
5f822d0a | 743 | |
d21b0d71 | 744 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
745 | ret = update_kernel_poll(&events); |
746 | if (ret < 0) { | |
7a485870 DG |
747 | goto error; |
748 | } | |
749 | update_poll_flag = 0; | |
750 | } | |
751 | ||
d21b0d71 | 752 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
753 | |
754 | /* Poll infinite value of time */ | |
88f2b785 | 755 | restart: |
a78af745 | 756 | health_poll_entry(); |
5eb91c98 | 757 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 758 | health_poll_exit(); |
7a485870 | 759 | if (ret < 0) { |
88f2b785 MD |
760 | /* |
761 | * Restart interrupted system call. | |
762 | */ | |
763 | if (errno == EINTR) { | |
764 | goto restart; | |
765 | } | |
7a485870 DG |
766 | goto error; |
767 | } else if (ret == 0) { | |
768 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
769 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
770 | "This should not have happened! Continuing..."); | |
7a485870 DG |
771 | continue; |
772 | } | |
773 | ||
0d9c5d77 DG |
774 | nb_fd = ret; |
775 | ||
5eb91c98 DG |
776 | for (i = 0; i < nb_fd; i++) { |
777 | /* Fetch once the poll data */ | |
778 | revents = LTTNG_POLL_GETEV(&events, i); | |
779 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 780 | |
840cb59c | 781 | health_code_update(); |
44a5e5eb | 782 | |
5eb91c98 | 783 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 784 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 785 | if (ret) { |
139ac872 MD |
786 | err = 0; |
787 | goto exit; | |
5eb91c98 | 788 | } |
7a485870 | 789 | |
5eb91c98 DG |
790 | /* Check for data on kernel pipe */ |
791 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
f921c78f DG |
792 | do { |
793 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
794 | } while (ret < 0 && errno == EINTR); | |
795 | /* | |
796 | * Ret value is useless here, if this pipe gets any actions an | |
797 | * update is required anyway. | |
798 | */ | |
5eb91c98 DG |
799 | update_poll_flag = 1; |
800 | continue; | |
801 | } else { | |
802 | /* | |
803 | * New CPU detected by the kernel. Adding kernel stream to | |
804 | * kernel session and updating the kernel consumer | |
805 | */ | |
806 | if (revents & LPOLLIN) { | |
2bdd86d4 | 807 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
808 | if (ret < 0) { |
809 | continue; | |
810 | } | |
811 | break; | |
812 | /* | |
813 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
814 | * and unregister kernel stream at this point. | |
815 | */ | |
7a485870 | 816 | } |
7a485870 DG |
817 | } |
818 | } | |
819 | } | |
820 | ||
139ac872 | 821 | exit: |
7a485870 | 822 | error: |
5eb91c98 | 823 | lttng_poll_clean(&events); |
76d7553f | 824 | error_poll_create: |
6993eeb3 | 825 | error_testpoint: |
6620da75 DG |
826 | utils_close_pipe(kernel_poll_pipe); |
827 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 828 | if (err) { |
840cb59c | 829 | health_error(); |
139ac872 | 830 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
831 | WARN("Kernel thread died unexpectedly. " |
832 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 833 | } |
927ca06a | 834 | health_unregister(); |
76d7553f | 835 | DBG("Kernel thread dying"); |
7a485870 DG |
836 | return NULL; |
837 | } | |
838 | ||
a23ec3a7 DG |
839 | /* |
840 | * Signal pthread condition of the consumer data that the thread. | |
841 | */ | |
842 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
843 | { | |
844 | pthread_mutex_lock(&data->cond_mutex); | |
845 | ||
846 | /* | |
847 | * The state is set before signaling. It can be any value, it's the waiter | |
848 | * job to correctly interpret this condition variable associated to the | |
849 | * consumer pthread_cond. | |
850 | * | |
851 | * A value of 0 means that the corresponding thread of the consumer data | |
852 | * was not started. 1 indicates that the thread has started and is ready | |
853 | * for action. A negative value means that there was an error during the | |
854 | * thread bootstrap. | |
855 | */ | |
856 | data->consumer_thread_is_ready = state; | |
857 | (void) pthread_cond_signal(&data->cond); | |
858 | ||
859 | pthread_mutex_unlock(&data->cond_mutex); | |
860 | } | |
861 | ||
1d4b027a | 862 | /* |
3bd1e081 | 863 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 864 | */ |
3bd1e081 | 865 | static void *thread_manage_consumer(void *data) |
1d4b027a | 866 | { |
139ac872 | 867 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 868 | uint32_t revents, nb_fd; |
1d4b027a | 869 | enum lttcomm_return_code code; |
5eb91c98 | 870 | struct lttng_poll_event events; |
3bd1e081 | 871 | struct consumer_data *consumer_data = data; |
1d4b027a | 872 | |
3bd1e081 | 873 | DBG("[thread] Manage consumer started"); |
1d4b027a | 874 | |
927ca06a DG |
875 | health_register(HEALTH_TYPE_CONSUMER); |
876 | ||
855060f8 | 877 | health_code_update(); |
9449cc75 | 878 | |
5eb91c98 | 879 | /* |
331744e3 JD |
880 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
881 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 882 | */ |
331744e3 | 883 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 884 | if (ret < 0) { |
76d7553f | 885 | goto error_poll; |
5eb91c98 | 886 | } |
273ea72c | 887 | |
edb8b045 DG |
888 | /* |
889 | * The error socket here is already in a listening state which was done | |
890 | * just before spawning this thread to avoid a race between the consumer | |
891 | * daemon exec trying to connect and the listen() call. | |
892 | */ | |
3bd1e081 | 893 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
894 | if (ret < 0) { |
895 | goto error; | |
896 | } | |
897 | ||
840cb59c | 898 | health_code_update(); |
44a5e5eb | 899 | |
331744e3 | 900 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 901 | restart: |
a78af745 | 902 | health_poll_entry(); |
8ac94142 | 903 | |
6993eeb3 CB |
904 | if (testpoint(thread_manage_consumer)) { |
905 | goto error; | |
906 | } | |
8ac94142 | 907 | |
5eb91c98 | 908 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 909 | health_poll_exit(); |
273ea72c | 910 | if (ret < 0) { |
88f2b785 MD |
911 | /* |
912 | * Restart interrupted system call. | |
913 | */ | |
914 | if (errno == EINTR) { | |
915 | goto restart; | |
916 | } | |
273ea72c DG |
917 | goto error; |
918 | } | |
919 | ||
0d9c5d77 DG |
920 | nb_fd = ret; |
921 | ||
5eb91c98 DG |
922 | for (i = 0; i < nb_fd; i++) { |
923 | /* Fetch once the poll data */ | |
924 | revents = LTTNG_POLL_GETEV(&events, i); | |
925 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
926 | ||
840cb59c | 927 | health_code_update(); |
44a5e5eb | 928 | |
5eb91c98 | 929 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 930 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 931 | if (ret) { |
139ac872 MD |
932 | err = 0; |
933 | goto exit; | |
5eb91c98 DG |
934 | } |
935 | ||
936 | /* Event on the registration socket */ | |
3bd1e081 | 937 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 938 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 939 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
940 | goto error; |
941 | } | |
942 | } | |
273ea72c DG |
943 | } |
944 | ||
3bd1e081 | 945 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
946 | if (sock < 0) { |
947 | goto error; | |
948 | } | |
949 | ||
b662582b DG |
950 | /* |
951 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
952 | * show must go on. | |
953 | */ | |
954 | (void) utils_set_fd_cloexec(sock); | |
955 | ||
840cb59c | 956 | health_code_update(); |
44a5e5eb | 957 | |
3bd1e081 | 958 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 959 | |
712ea556 | 960 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
961 | ret = lttcomm_recv_unix_sock(sock, &code, |
962 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
963 | if (ret <= 0) { |
964 | goto error; | |
965 | } | |
966 | ||
840cb59c | 967 | health_code_update(); |
44a5e5eb | 968 | |
f73fabfd | 969 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 970 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
971 | consumer_data->cmd_sock = |
972 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
331744e3 JD |
973 | consumer_data->metadata_sock.fd = |
974 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
975 | if (consumer_data->cmd_sock < 0 || | |
976 | consumer_data->metadata_sock.fd < 0) { | |
977 | PERROR("consumer connect cmd socket"); | |
a23ec3a7 DG |
978 | /* On error, signal condition and quit. */ |
979 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
980 | goto error; |
981 | } | |
331744e3 JD |
982 | /* Create metadata socket lock. */ |
983 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
984 | if (consumer_data->metadata_sock.lock == NULL) { | |
985 | PERROR("zmalloc pthread mutex"); | |
986 | ret = -1; | |
987 | goto error; | |
988 | } | |
989 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
990 | ||
a23ec3a7 | 991 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
992 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
993 | DBG("Consumer metadata socket ready (fd: %d)", | |
994 | consumer_data->metadata_sock.fd); | |
1d4b027a | 995 | } else { |
3bd1e081 | 996 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
997 | lttcomm_get_readable_code(-code)); |
998 | goto error; | |
999 | } | |
1000 | ||
331744e3 | 1001 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1002 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1003 | if (ret < 0) { |
72079cae DG |
1004 | goto error; |
1005 | } | |
1006 | ||
331744e3 | 1007 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1008 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1009 | if (ret < 0) { | |
72079cae | 1010 | goto error; |
5eb91c98 DG |
1011 | } |
1012 | ||
331744e3 JD |
1013 | /* Add metadata socket that is successfully connected. */ |
1014 | ret = lttng_poll_add(&events, consumer_data->metadata_sock.fd, | |
1015 | LPOLLIN | LPOLLRDHUP); | |
1016 | if (ret < 0) { | |
1017 | goto error; | |
1018 | } | |
1019 | ||
840cb59c | 1020 | health_code_update(); |
44a5e5eb | 1021 | |
331744e3 | 1022 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1023 | restart_poll: |
331744e3 JD |
1024 | while (1) { |
1025 | health_poll_entry(); | |
1026 | ret = lttng_poll_wait(&events, -1); | |
1027 | health_poll_exit(); | |
1028 | if (ret < 0) { | |
1029 | /* | |
1030 | * Restart interrupted system call. | |
1031 | */ | |
1032 | if (errno == EINTR) { | |
1033 | goto restart_poll; | |
1034 | } | |
1035 | goto error; | |
88f2b785 | 1036 | } |
72079cae | 1037 | |
331744e3 | 1038 | nb_fd = ret; |
0d9c5d77 | 1039 | |
331744e3 JD |
1040 | for (i = 0; i < nb_fd; i++) { |
1041 | /* Fetch once the poll data */ | |
1042 | revents = LTTNG_POLL_GETEV(&events, i); | |
1043 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1044 | |
331744e3 | 1045 | health_code_update(); |
44a5e5eb | 1046 | |
331744e3 JD |
1047 | /* Thread quit pipe has been closed. Killing thread. */ |
1048 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1049 | if (ret) { | |
1050 | err = 0; | |
1051 | goto exit; | |
1052 | } | |
5eb91c98 | 1053 | |
331744e3 JD |
1054 | if (pollfd == sock) { |
1055 | /* Event on the consumerd socket */ | |
1056 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1057 | ERR("consumer err socket second poll error"); | |
1058 | goto error; | |
1059 | } | |
1060 | health_code_update(); | |
1061 | /* Wait for any kconsumerd error */ | |
1062 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1063 | sizeof(enum lttcomm_return_code)); | |
1064 | if (ret <= 0) { | |
1065 | ERR("consumer closed the command socket"); | |
1066 | goto error; | |
1067 | } | |
1068 | ||
1069 | ERR("consumer return code : %s", | |
1070 | lttcomm_get_readable_code(-code)); | |
1071 | ||
1072 | goto exit; | |
1073 | } else if (pollfd == consumer_data->metadata_sock.fd) { | |
1074 | /* UST metadata requests */ | |
1075 | ret = ust_consumer_metadata_request( | |
1076 | &consumer_data->metadata_sock); | |
1077 | if (ret < 0) { | |
1078 | ERR("Handling metadata request"); | |
1079 | goto error; | |
1080 | } | |
1081 | break; | |
1082 | } else { | |
1083 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1084 | goto error; |
1085 | } | |
1086 | } | |
331744e3 | 1087 | health_code_update(); |
5eb91c98 DG |
1088 | } |
1089 | ||
139ac872 | 1090 | exit: |
1d4b027a | 1091 | error: |
5c827ce0 DG |
1092 | /* Immediately set the consumerd state to stopped */ |
1093 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1094 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1095 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1096 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1097 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1098 | } else { | |
1099 | /* Code flow error... */ | |
1100 | assert(0); | |
1101 | } | |
1102 | ||
76d7553f MD |
1103 | if (consumer_data->err_sock >= 0) { |
1104 | ret = close(consumer_data->err_sock); | |
1105 | if (ret) { | |
1106 | PERROR("close"); | |
1107 | } | |
1108 | } | |
1109 | if (consumer_data->cmd_sock >= 0) { | |
1110 | ret = close(consumer_data->cmd_sock); | |
1111 | if (ret) { | |
1112 | PERROR("close"); | |
1113 | } | |
1114 | } | |
331744e3 JD |
1115 | if (consumer_data->metadata_sock.fd >= 0) { |
1116 | ret = close(consumer_data->metadata_sock.fd); | |
1117 | if (ret) { | |
1118 | PERROR("close"); | |
1119 | } | |
1120 | } | |
1121 | /* Cleanup metadata socket mutex. */ | |
1122 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1123 | free(consumer_data->metadata_sock.lock); | |
1124 | ||
76d7553f MD |
1125 | if (sock >= 0) { |
1126 | ret = close(sock); | |
1127 | if (ret) { | |
1128 | PERROR("close"); | |
1129 | } | |
1130 | } | |
273ea72c | 1131 | |
3bd1e081 MD |
1132 | unlink(consumer_data->err_unix_sock_path); |
1133 | unlink(consumer_data->cmd_unix_sock_path); | |
1134 | consumer_data->pid = 0; | |
1d4b027a | 1135 | |
5eb91c98 | 1136 | lttng_poll_clean(&events); |
76d7553f | 1137 | error_poll: |
139ac872 | 1138 | if (err) { |
840cb59c | 1139 | health_error(); |
139ac872 MD |
1140 | ERR("Health error occurred in %s", __func__); |
1141 | } | |
927ca06a | 1142 | health_unregister(); |
76d7553f | 1143 | DBG("consumer thread cleanup completed"); |
0177d773 | 1144 | |
5eb91c98 | 1145 | return NULL; |
099e26bd DG |
1146 | } |
1147 | ||
099e26bd DG |
1148 | /* |
1149 | * This thread manage application communication. | |
1d4b027a DG |
1150 | */ |
1151 | static void *thread_manage_apps(void *data) | |
099e26bd | 1152 | { |
139ac872 | 1153 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1154 | uint32_t revents, nb_fd; |
5eb91c98 | 1155 | struct lttng_poll_event events; |
099e26bd DG |
1156 | |
1157 | DBG("[thread] Manage application started"); | |
1158 | ||
f6a9efaa DG |
1159 | rcu_register_thread(); |
1160 | rcu_thread_online(); | |
1161 | ||
927ca06a DG |
1162 | health_register(HEALTH_TYPE_APP_MANAGE); |
1163 | ||
6993eeb3 CB |
1164 | if (testpoint(thread_manage_apps)) { |
1165 | goto error_testpoint; | |
1166 | } | |
1167 | ||
840cb59c | 1168 | health_code_update(); |
44a5e5eb | 1169 | |
d0b96690 | 1170 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1171 | if (ret < 0) { |
76d7553f | 1172 | goto error_poll_create; |
5eb91c98 | 1173 | } |
099e26bd | 1174 | |
5eb91c98 DG |
1175 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1176 | if (ret < 0) { | |
1177 | goto error; | |
1178 | } | |
099e26bd | 1179 | |
6993eeb3 CB |
1180 | if (testpoint(thread_manage_apps_before_loop)) { |
1181 | goto error; | |
1182 | } | |
8ac94142 | 1183 | |
840cb59c | 1184 | health_code_update(); |
44a5e5eb | 1185 | |
5eb91c98 | 1186 | while (1) { |
d21b0d71 | 1187 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1188 | |
1189 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1190 | restart: |
a78af745 | 1191 | health_poll_entry(); |
5eb91c98 | 1192 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1193 | health_poll_exit(); |
099e26bd | 1194 | if (ret < 0) { |
88f2b785 MD |
1195 | /* |
1196 | * Restart interrupted system call. | |
1197 | */ | |
1198 | if (errno == EINTR) { | |
1199 | goto restart; | |
1200 | } | |
099e26bd DG |
1201 | goto error; |
1202 | } | |
1203 | ||
0d9c5d77 DG |
1204 | nb_fd = ret; |
1205 | ||
5eb91c98 DG |
1206 | for (i = 0; i < nb_fd; i++) { |
1207 | /* Fetch once the poll data */ | |
1208 | revents = LTTNG_POLL_GETEV(&events, i); | |
1209 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1210 | ||
840cb59c | 1211 | health_code_update(); |
44a5e5eb | 1212 | |
5eb91c98 | 1213 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1214 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1215 | if (ret) { |
139ac872 MD |
1216 | err = 0; |
1217 | goto exit; | |
5eb91c98 | 1218 | } |
099e26bd | 1219 | |
5eb91c98 DG |
1220 | /* Inspect the apps cmd pipe */ |
1221 | if (pollfd == apps_cmd_pipe[0]) { | |
1222 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1223 | ERR("Apps command pipe error"); | |
0177d773 | 1224 | goto error; |
5eb91c98 | 1225 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1226 | int sock; |
1227 | ||
5eb91c98 | 1228 | /* Empty pipe */ |
f921c78f | 1229 | do { |
d0b96690 | 1230 | ret = read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
f921c78f | 1231 | } while (ret < 0 && errno == EINTR); |
d0b96690 | 1232 | if (ret < 0 || ret < sizeof(sock)) { |
76d7553f | 1233 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1234 | goto error; |
1235 | } | |
099e26bd | 1236 | |
840cb59c | 1237 | health_code_update(); |
44a5e5eb | 1238 | |
ffe60014 | 1239 | /* |
d0b96690 DG |
1240 | * We only monitor the error events of the socket. This |
1241 | * thread does not handle any incoming data from UST | |
1242 | * (POLLIN). | |
ffe60014 | 1243 | */ |
d0b96690 DG |
1244 | ret = lttng_poll_add(&events, sock, |
1245 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1246 | if (ret < 0) { | |
5eb91c98 | 1247 | goto error; |
e0c7ec2b | 1248 | } |
acc7b41b | 1249 | |
d0b96690 DG |
1250 | /* Set socket timeout for both receiving and ending */ |
1251 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1252 | app_socket_timeout); | |
1253 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1254 | app_socket_timeout); | |
ae9e45b3 | 1255 | |
d0b96690 | 1256 | DBG("Apps with sock %d added to poll set", sock); |
487cf67c | 1257 | |
840cb59c | 1258 | health_code_update(); |
44a5e5eb | 1259 | |
5eb91c98 | 1260 | break; |
0177d773 | 1261 | } |
5eb91c98 DG |
1262 | } else { |
1263 | /* | |
54d01ffb DG |
1264 | * At this point, we know that a registered application made |
1265 | * the event at poll_wait. | |
5eb91c98 DG |
1266 | */ |
1267 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1268 | /* Removing from the poll set */ | |
1269 | ret = lttng_poll_del(&events, pollfd); | |
1270 | if (ret < 0) { | |
1271 | goto error; | |
1272 | } | |
099e26bd | 1273 | |
b9d9b220 | 1274 | /* Socket closed on remote end. */ |
56fff090 | 1275 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1276 | break; |
1277 | } | |
099e26bd | 1278 | } |
44a5e5eb | 1279 | |
840cb59c | 1280 | health_code_update(); |
099e26bd | 1281 | } |
099e26bd DG |
1282 | } |
1283 | ||
139ac872 | 1284 | exit: |
099e26bd | 1285 | error: |
5eb91c98 | 1286 | lttng_poll_clean(&events); |
76d7553f | 1287 | error_poll_create: |
6993eeb3 | 1288 | error_testpoint: |
6620da75 DG |
1289 | utils_close_pipe(apps_cmd_pipe); |
1290 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1291 | ||
1292 | /* | |
1293 | * We don't clean the UST app hash table here since already registered | |
1294 | * applications can still be controlled so let them be until the session | |
1295 | * daemon dies or the applications stop. | |
1296 | */ | |
1297 | ||
139ac872 | 1298 | if (err) { |
840cb59c | 1299 | health_error(); |
139ac872 MD |
1300 | ERR("Health error occurred in %s", __func__); |
1301 | } | |
927ca06a | 1302 | health_unregister(); |
76d7553f | 1303 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1304 | rcu_thread_offline(); |
1305 | rcu_unregister_thread(); | |
099e26bd DG |
1306 | return NULL; |
1307 | } | |
1308 | ||
d0b96690 | 1309 | /* |
d88aee68 DG |
1310 | * Send a socket to a thread This is called from the dispatch UST registration |
1311 | * thread once all sockets are set for the application. | |
d0b96690 DG |
1312 | * |
1313 | * On success, return 0 else a negative value being the errno message of the | |
1314 | * write(). | |
1315 | */ | |
d88aee68 | 1316 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 DG |
1317 | { |
1318 | int ret; | |
1319 | ||
d0b96690 | 1320 | /* Sockets MUST be set or else this should not have been called. */ |
d88aee68 DG |
1321 | assert(fd >= 0); |
1322 | assert(sock >= 0); | |
d0b96690 DG |
1323 | |
1324 | do { | |
d88aee68 | 1325 | ret = write(fd, &sock, sizeof(sock)); |
d0b96690 | 1326 | } while (ret < 0 && errno == EINTR); |
d88aee68 DG |
1327 | if (ret < 0 || ret != sizeof(sock)) { |
1328 | PERROR("write apps pipe %d", fd); | |
d0b96690 DG |
1329 | if (ret < 0) { |
1330 | ret = -errno; | |
1331 | } | |
1332 | goto error; | |
1333 | } | |
1334 | ||
1335 | /* All good. Don't send back the write positive ret value. */ | |
1336 | ret = 0; | |
1337 | error: | |
1338 | return ret; | |
1339 | } | |
1340 | ||
f45e313d DG |
1341 | /* |
1342 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1343 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1344 | * notify socket is never received. | |
1345 | */ | |
1346 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1347 | { | |
1348 | int ret, nb_fd = 0, i; | |
1349 | unsigned int fd_added = 0; | |
1350 | struct lttng_poll_event events; | |
1351 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1352 | ||
1353 | assert(wait_queue); | |
1354 | ||
1355 | lttng_poll_init(&events); | |
1356 | ||
1357 | /* Just skip everything for an empty queue. */ | |
1358 | if (!wait_queue->count) { | |
1359 | goto end; | |
1360 | } | |
1361 | ||
1362 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1363 | if (ret < 0) { | |
1364 | goto error_create; | |
1365 | } | |
1366 | ||
1367 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1368 | &wait_queue->head, head) { | |
1369 | assert(wait_node->app); | |
1370 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1371 | LPOLLHUP | LPOLLERR); | |
1372 | if (ret < 0) { | |
1373 | goto error; | |
1374 | } | |
1375 | ||
1376 | fd_added = 1; | |
1377 | } | |
1378 | ||
1379 | if (!fd_added) { | |
1380 | goto end; | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * Poll but don't block so we can quickly identify the faulty events and | |
1385 | * clean them afterwards from the wait queue. | |
1386 | */ | |
1387 | ret = lttng_poll_wait(&events, 0); | |
1388 | if (ret < 0) { | |
1389 | goto error; | |
1390 | } | |
1391 | nb_fd = ret; | |
1392 | ||
1393 | for (i = 0; i < nb_fd; i++) { | |
1394 | /* Get faulty FD. */ | |
1395 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1396 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1397 | ||
1398 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1399 | &wait_queue->head, head) { | |
1400 | if (pollfd == wait_node->app->sock && | |
1401 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1402 | cds_list_del(&wait_node->head); | |
1403 | wait_queue->count--; | |
1404 | ust_app_destroy(wait_node->app); | |
1405 | free(wait_node); | |
1406 | break; | |
1407 | } | |
1408 | } | |
1409 | } | |
1410 | ||
1411 | if (nb_fd > 0) { | |
1412 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1413 | } | |
1414 | ||
1415 | end: | |
1416 | lttng_poll_clean(&events); | |
1417 | return; | |
1418 | ||
1419 | error: | |
1420 | lttng_poll_clean(&events); | |
1421 | error_create: | |
1422 | ERR("Unable to sanitize wait queue"); | |
1423 | return; | |
1424 | } | |
1425 | ||
099e26bd DG |
1426 | /* |
1427 | * Dispatch request from the registration threads to the application | |
1428 | * communication thread. | |
1429 | */ | |
1430 | static void *thread_dispatch_ust_registration(void *data) | |
1431 | { | |
12e2b881 | 1432 | int ret, err = -1; |
099e26bd DG |
1433 | struct cds_wfq_node *node; |
1434 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1435 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1436 | struct ust_reg_wait_queue wait_queue = { | |
1437 | .count = 0, | |
1438 | }; | |
d0b96690 | 1439 | |
12e2b881 MD |
1440 | health_register(HEALTH_TYPE_APP_REG_DISPATCH); |
1441 | ||
1442 | health_code_update(); | |
1443 | ||
f45e313d | 1444 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1445 | |
1446 | DBG("[thread] Dispatch UST command started"); | |
1447 | ||
26c9d55e | 1448 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1449 | health_code_update(); |
1450 | ||
099e26bd DG |
1451 | /* Atomically prepare the queue futex */ |
1452 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1453 | ||
1454 | do { | |
d0b96690 | 1455 | struct ust_app *app = NULL; |
7972aab2 | 1456 | ust_cmd = NULL; |
d0b96690 | 1457 | |
f45e313d DG |
1458 | /* |
1459 | * Make sure we don't have node(s) that have hung up before receiving | |
1460 | * the notify socket. This is to clean the list in order to avoid | |
1461 | * memory leaks from notify socket that are never seen. | |
1462 | */ | |
1463 | sanitize_wait_queue(&wait_queue); | |
1464 | ||
12e2b881 | 1465 | health_code_update(); |
099e26bd DG |
1466 | /* Dequeue command for registration */ |
1467 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1468 | if (node == NULL) { | |
00a17c97 | 1469 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1470 | /* Continue thread execution */ |
1471 | break; | |
1472 | } | |
1473 | ||
1474 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1475 | ||
2f50c8a3 DG |
1476 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1477 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1478 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1479 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1480 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1481 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1482 | |
1483 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1484 | wait_node = zmalloc(sizeof(*wait_node)); | |
1485 | if (!wait_node) { | |
1486 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1487 | ret = close(ust_cmd->sock); |
1488 | if (ret < 0) { | |
1489 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1490 | } | |
1491 | lttng_fd_put(1, LTTNG_FD_APPS); | |
7972aab2 | 1492 | free(ust_cmd); |
d0b96690 DG |
1493 | goto error; |
1494 | } | |
1495 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1496 | ||
1497 | /* Create application object if socket is CMD. */ | |
1498 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1499 | ust_cmd->sock); | |
1500 | if (!wait_node->app) { | |
1501 | ret = close(ust_cmd->sock); | |
1502 | if (ret < 0) { | |
1503 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1504 | } |
d88aee68 DG |
1505 | lttng_fd_put(1, LTTNG_FD_APPS); |
1506 | free(wait_node); | |
7972aab2 | 1507 | free(ust_cmd); |
d0b96690 DG |
1508 | continue; |
1509 | } | |
1510 | /* | |
1511 | * Add application to the wait queue so we can set the notify | |
1512 | * socket before putting this object in the global ht. | |
1513 | */ | |
f45e313d DG |
1514 | cds_list_add(&wait_node->head, &wait_queue.head); |
1515 | wait_queue.count++; | |
d0b96690 | 1516 | |
7972aab2 | 1517 | free(ust_cmd); |
d0b96690 DG |
1518 | /* |
1519 | * We have to continue here since we don't have the notify | |
1520 | * socket and the application MUST be added to the hash table | |
1521 | * only at that moment. | |
1522 | */ | |
1523 | continue; | |
1524 | } else { | |
1525 | /* | |
1526 | * Look for the application in the local wait queue and set the | |
1527 | * notify socket if found. | |
1528 | */ | |
d88aee68 | 1529 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1530 | &wait_queue.head, head) { |
12e2b881 | 1531 | health_code_update(); |
d0b96690 DG |
1532 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1533 | wait_node->app->notify_sock = ust_cmd->sock; | |
1534 | cds_list_del(&wait_node->head); | |
f45e313d | 1535 | wait_queue.count--; |
d0b96690 DG |
1536 | app = wait_node->app; |
1537 | free(wait_node); | |
1538 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1539 | break; | |
1540 | } | |
1541 | } | |
020d7f60 DG |
1542 | |
1543 | /* | |
1544 | * With no application at this stage the received socket is | |
1545 | * basically useless so close it before we free the cmd data | |
1546 | * structure for good. | |
1547 | */ | |
1548 | if (!app) { | |
1549 | ret = close(ust_cmd->sock); | |
1550 | if (ret < 0) { | |
1551 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1552 | } | |
1553 | lttng_fd_put(1, LTTNG_FD_APPS); | |
1554 | } | |
7972aab2 | 1555 | free(ust_cmd); |
d0b96690 DG |
1556 | } |
1557 | ||
1558 | if (app) { | |
d0b96690 DG |
1559 | /* |
1560 | * @session_lock_list | |
1561 | * | |
1562 | * Lock the global session list so from the register up to the | |
1563 | * registration done message, no thread can see the application | |
1564 | * and change its state. | |
1565 | */ | |
1566 | session_lock_list(); | |
1567 | rcu_read_lock(); | |
d88aee68 | 1568 | |
d0b96690 DG |
1569 | /* |
1570 | * Add application to the global hash table. This needs to be | |
1571 | * done before the update to the UST registry can locate the | |
1572 | * application. | |
1573 | */ | |
1574 | ust_app_add(app); | |
d88aee68 DG |
1575 | |
1576 | /* Set app version. This call will print an error if needed. */ | |
1577 | (void) ust_app_version(app); | |
1578 | ||
1579 | /* Send notify socket through the notify pipe. */ | |
1580 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1581 | app->notify_sock); | |
1582 | if (ret < 0) { | |
1583 | rcu_read_unlock(); | |
1584 | session_unlock_list(); | |
1585 | /* No notify thread, stop the UST tracing. */ | |
1586 | goto error; | |
6620da75 | 1587 | } |
d88aee68 | 1588 | |
d0b96690 DG |
1589 | /* |
1590 | * Update newly registered application with the tracing | |
1591 | * registry info already enabled information. | |
1592 | */ | |
1593 | update_ust_app(app->sock); | |
d88aee68 DG |
1594 | |
1595 | /* | |
1596 | * Don't care about return value. Let the manage apps threads | |
1597 | * handle app unregistration upon socket close. | |
1598 | */ | |
1599 | (void) ust_app_register_done(app->sock); | |
1600 | ||
1601 | /* | |
1602 | * Even if the application socket has been closed, send the app | |
1603 | * to the thread and unregistration will take place at that | |
1604 | * place. | |
1605 | */ | |
1606 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1607 | if (ret < 0) { |
d88aee68 DG |
1608 | rcu_read_unlock(); |
1609 | session_unlock_list(); | |
1610 | /* No apps. thread, stop the UST tracing. */ | |
1611 | goto error; | |
d0b96690 | 1612 | } |
d88aee68 | 1613 | |
d0b96690 DG |
1614 | rcu_read_unlock(); |
1615 | session_unlock_list(); | |
099e26bd | 1616 | } |
099e26bd DG |
1617 | } while (node != NULL); |
1618 | ||
12e2b881 | 1619 | health_poll_entry(); |
099e26bd DG |
1620 | /* Futex wait on queue. Blocking call on futex() */ |
1621 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1622 | health_poll_exit(); |
099e26bd | 1623 | } |
12e2b881 MD |
1624 | /* Normal exit, no error */ |
1625 | err = 0; | |
099e26bd DG |
1626 | |
1627 | error: | |
d88aee68 DG |
1628 | /* Clean up wait queue. */ |
1629 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1630 | &wait_queue.head, head) { |
d88aee68 | 1631 | cds_list_del(&wait_node->head); |
f45e313d | 1632 | wait_queue.count--; |
d88aee68 DG |
1633 | free(wait_node); |
1634 | } | |
1635 | ||
099e26bd | 1636 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1637 | if (err) { |
1638 | health_error(); | |
1639 | ERR("Health error occurred in %s", __func__); | |
1640 | } | |
1641 | health_unregister(); | |
099e26bd DG |
1642 | return NULL; |
1643 | } | |
1644 | ||
1645 | /* | |
1646 | * This thread manage application registration. | |
1647 | */ | |
1648 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1649 | { |
139ac872 | 1650 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1651 | uint32_t revents, nb_fd; |
1652 | struct lttng_poll_event events; | |
099e26bd DG |
1653 | /* |
1654 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1655 | * freed in the manage apps thread. | |
1656 | */ | |
1657 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1658 | |
099e26bd | 1659 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1660 | |
927ca06a DG |
1661 | health_register(HEALTH_TYPE_APP_REG); |
1662 | ||
6993eeb3 CB |
1663 | if (testpoint(thread_registration_apps)) { |
1664 | goto error_testpoint; | |
1665 | } | |
8ac94142 | 1666 | |
1d4b027a DG |
1667 | ret = lttcomm_listen_unix_sock(apps_sock); |
1668 | if (ret < 0) { | |
76d7553f | 1669 | goto error_listen; |
1d4b027a DG |
1670 | } |
1671 | ||
5eb91c98 DG |
1672 | /* |
1673 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1674 | * more will be added to this poll set. | |
1675 | */ | |
d0b96690 | 1676 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1677 | if (ret < 0) { |
76d7553f | 1678 | goto error_create_poll; |
5eb91c98 | 1679 | } |
273ea72c | 1680 | |
5eb91c98 DG |
1681 | /* Add the application registration socket */ |
1682 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1683 | if (ret < 0) { | |
76d7553f | 1684 | goto error_poll_add; |
5eb91c98 | 1685 | } |
273ea72c | 1686 | |
1d4b027a | 1687 | /* Notify all applications to register */ |
0fdd1e2c DG |
1688 | ret = notify_ust_apps(1); |
1689 | if (ret < 0) { | |
1690 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1691 | "Execution continues but there might be problem for already\n" |
1692 | "running applications that wishes to register."); | |
0fdd1e2c | 1693 | } |
1d4b027a DG |
1694 | |
1695 | while (1) { | |
1696 | DBG("Accepting application registration"); | |
273ea72c DG |
1697 | |
1698 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1699 | restart: |
a78af745 | 1700 | health_poll_entry(); |
5eb91c98 | 1701 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1702 | health_poll_exit(); |
273ea72c | 1703 | if (ret < 0) { |
88f2b785 MD |
1704 | /* |
1705 | * Restart interrupted system call. | |
1706 | */ | |
1707 | if (errno == EINTR) { | |
1708 | goto restart; | |
1709 | } | |
273ea72c DG |
1710 | goto error; |
1711 | } | |
1712 | ||
0d9c5d77 DG |
1713 | nb_fd = ret; |
1714 | ||
5eb91c98 | 1715 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1716 | health_code_update(); |
139ac872 | 1717 | |
5eb91c98 DG |
1718 | /* Fetch once the poll data */ |
1719 | revents = LTTNG_POLL_GETEV(&events, i); | |
1720 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1721 | |
5eb91c98 | 1722 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1723 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1724 | if (ret) { |
139ac872 MD |
1725 | err = 0; |
1726 | goto exit; | |
90014c57 | 1727 | } |
1d4b027a | 1728 | |
5eb91c98 DG |
1729 | /* Event on the registration socket */ |
1730 | if (pollfd == apps_sock) { | |
1731 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1732 | ERR("Register apps socket poll error"); | |
1733 | goto error; | |
1734 | } else if (revents & LPOLLIN) { | |
1735 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1736 | if (sock < 0) { | |
1737 | goto error; | |
1738 | } | |
099e26bd | 1739 | |
b662582b DG |
1740 | /* |
1741 | * Set the CLOEXEC flag. Return code is useless because | |
1742 | * either way, the show must go on. | |
1743 | */ | |
1744 | (void) utils_set_fd_cloexec(sock); | |
1745 | ||
5eb91c98 | 1746 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1747 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1748 | if (ust_cmd == NULL) { |
76d7553f | 1749 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1750 | goto error; |
1751 | } | |
1d4b027a | 1752 | |
5eb91c98 DG |
1753 | /* |
1754 | * Using message-based transmissions to ensure we don't | |
1755 | * have to deal with partially received messages. | |
1756 | */ | |
4063050c MD |
1757 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1758 | if (ret < 0) { | |
1759 | ERR("Exhausted file descriptors allowed for applications."); | |
1760 | free(ust_cmd); | |
1761 | ret = close(sock); | |
1762 | if (ret) { | |
1763 | PERROR("close"); | |
1764 | } | |
1765 | sock = -1; | |
1766 | continue; | |
1767 | } | |
d88aee68 | 1768 | |
840cb59c | 1769 | health_code_update(); |
d0b96690 DG |
1770 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1771 | if (ret < 0) { | |
5eb91c98 | 1772 | free(ust_cmd); |
d0b96690 | 1773 | /* Close socket of the application. */ |
76d7553f MD |
1774 | ret = close(sock); |
1775 | if (ret) { | |
1776 | PERROR("close"); | |
1777 | } | |
4063050c | 1778 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1779 | sock = -1; |
5eb91c98 DG |
1780 | continue; |
1781 | } | |
840cb59c | 1782 | health_code_update(); |
099e26bd | 1783 | |
5eb91c98 | 1784 | ust_cmd->sock = sock; |
34a2494f | 1785 | sock = -1; |
099e26bd | 1786 | |
5eb91c98 DG |
1787 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1788 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1789 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1790 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1791 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1792 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1793 | |
5eb91c98 DG |
1794 | /* |
1795 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1796 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1797 | */ |
1798 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1799 | ||
1800 | /* | |
1801 | * Wake the registration queue futex. Implicit memory | |
1802 | * barrier with the exchange in cds_wfq_enqueue. | |
1803 | */ | |
1804 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1805 | } | |
1806 | } | |
90014c57 | 1807 | } |
1d4b027a DG |
1808 | } |
1809 | ||
139ac872 | 1810 | exit: |
1d4b027a | 1811 | error: |
139ac872 | 1812 | if (err) { |
840cb59c | 1813 | health_error(); |
139ac872 MD |
1814 | ERR("Health error occurred in %s", __func__); |
1815 | } | |
139ac872 | 1816 | |
0fdd1e2c DG |
1817 | /* Notify that the registration thread is gone */ |
1818 | notify_ust_apps(0); | |
1819 | ||
a4b35e07 | 1820 | if (apps_sock >= 0) { |
76d7553f MD |
1821 | ret = close(apps_sock); |
1822 | if (ret) { | |
1823 | PERROR("close"); | |
1824 | } | |
a4b35e07 | 1825 | } |
46c3f085 | 1826 | if (sock >= 0) { |
76d7553f MD |
1827 | ret = close(sock); |
1828 | if (ret) { | |
1829 | PERROR("close"); | |
1830 | } | |
4063050c | 1831 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1832 | } |
273ea72c | 1833 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1834 | |
76d7553f | 1835 | error_poll_add: |
5eb91c98 | 1836 | lttng_poll_clean(&events); |
76d7553f MD |
1837 | error_listen: |
1838 | error_create_poll: | |
6993eeb3 | 1839 | error_testpoint: |
76d7553f | 1840 | DBG("UST Registration thread cleanup complete"); |
927ca06a | 1841 | health_unregister(); |
5eb91c98 | 1842 | |
1d4b027a DG |
1843 | return NULL; |
1844 | } | |
1845 | ||
8c0faa1d | 1846 | /* |
3bd1e081 | 1847 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1848 | * exec or it will fails. |
8c0faa1d | 1849 | */ |
3bd1e081 | 1850 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1851 | { |
a23ec3a7 | 1852 | int ret, clock_ret; |
ee0b0061 DG |
1853 | struct timespec timeout; |
1854 | ||
a23ec3a7 DG |
1855 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1856 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1857 | |
a23ec3a7 DG |
1858 | /* Setup pthread condition */ |
1859 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1860 | if (ret != 0) { | |
1861 | errno = ret; | |
1862 | PERROR("pthread_condattr_init consumer data"); | |
1863 | goto error; | |
1864 | } | |
1865 | ||
1866 | /* | |
1867 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1868 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1869 | * for a more details and how we noticed it. | |
1870 | */ | |
1871 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1872 | if (ret != 0) { | |
1873 | errno = ret; | |
1874 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1875 | goto error; |
1876 | } | |
8c0faa1d | 1877 | |
a23ec3a7 DG |
1878 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1879 | if (ret != 0) { | |
1880 | errno = ret; | |
1881 | PERROR("pthread_cond_init consumer data"); | |
1882 | goto error; | |
1883 | } | |
1884 | ||
1885 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1886 | consumer_data); | |
8c0faa1d | 1887 | if (ret != 0) { |
3bd1e081 | 1888 | PERROR("pthread_create consumer"); |
ee0b0061 | 1889 | ret = -1; |
8c0faa1d DG |
1890 | goto error; |
1891 | } | |
1892 | ||
a23ec3a7 DG |
1893 | /* We are about to wait on a pthread condition */ |
1894 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1895 | ||
ee0b0061 | 1896 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1897 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1898 | /* | |
1899 | * Set the timeout for the condition timed wait even if the clock gettime | |
1900 | * call fails since we might loop on that call and we want to avoid to | |
1901 | * increment the timeout too many times. | |
1902 | */ | |
1903 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1904 | ||
1905 | /* | |
1906 | * The following loop COULD be skipped in some conditions so this is why we | |
1907 | * set ret to 0 in order to make sure at least one round of the loop is | |
1908 | * done. | |
1909 | */ | |
1910 | ret = 0; | |
1911 | ||
1912 | /* | |
1913 | * Loop until the condition is reached or when a timeout is reached. Note | |
1914 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1915 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1916 | * possible. This loop does not take any chances and works with both of | |
1917 | * them. | |
1918 | */ | |
1919 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1920 | if (clock_ret < 0) { | |
1921 | PERROR("clock_gettime spawn consumer"); | |
1922 | /* Infinite wait for the consumerd thread to be ready */ | |
1923 | ret = pthread_cond_wait(&consumer_data->cond, | |
1924 | &consumer_data->cond_mutex); | |
1925 | } else { | |
1926 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1927 | &consumer_data->cond_mutex, &timeout); | |
1928 | } | |
ee0b0061 | 1929 | } |
8c0faa1d | 1930 | |
a23ec3a7 DG |
1931 | /* Release the pthread condition */ |
1932 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1933 | ||
1934 | if (ret != 0) { | |
1935 | errno = ret; | |
1936 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1937 | /* |
1938 | * Call has timed out so we kill the kconsumerd_thread and return | |
1939 | * an error. | |
1940 | */ | |
a23ec3a7 DG |
1941 | ERR("Condition timed out. The consumer thread was never ready." |
1942 | " Killing it"); | |
3bd1e081 | 1943 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1944 | if (ret < 0) { |
3bd1e081 | 1945 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1946 | } |
1947 | } else { | |
a23ec3a7 | 1948 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1949 | } |
1950 | goto error; | |
1951 | } | |
1952 | ||
3bd1e081 MD |
1953 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1954 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1955 | ERR("Consumerd did not start"); |
3bd1e081 | 1956 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1957 | goto error; |
1958 | } | |
3bd1e081 | 1959 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1960 | |
8c0faa1d DG |
1961 | return 0; |
1962 | ||
1963 | error: | |
1964 | return ret; | |
1965 | } | |
1966 | ||
d9800920 | 1967 | /* |
3bd1e081 | 1968 | * Join consumer thread |
d9800920 | 1969 | */ |
3bd1e081 | 1970 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1971 | { |
1972 | void *status; | |
cf3af59e | 1973 | |
e8209f6b DG |
1974 | /* Consumer pid must be a real one. */ |
1975 | if (consumer_data->pid > 0) { | |
c617c0c6 | 1976 | int ret; |
3bd1e081 | 1977 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1978 | if (ret) { |
3bd1e081 | 1979 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1980 | return ret; |
1981 | } | |
3bd1e081 | 1982 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1983 | } else { |
1984 | return 0; | |
1985 | } | |
1986 | } | |
1987 | ||
8c0faa1d | 1988 | /* |
3bd1e081 | 1989 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1990 | * |
d063d709 | 1991 | * Return pid if successful else -1. |
8c0faa1d | 1992 | */ |
3bd1e081 | 1993 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1994 | { |
1995 | int ret; | |
1996 | pid_t pid; | |
94c55f17 | 1997 | const char *consumer_to_use; |
53086306 | 1998 | const char *verbosity; |
94c55f17 | 1999 | struct stat st; |
8c0faa1d | 2000 | |
3bd1e081 | 2001 | DBG("Spawning consumerd"); |
c49dc785 | 2002 | |
8c0faa1d DG |
2003 | pid = fork(); |
2004 | if (pid == 0) { | |
2005 | /* | |
3bd1e081 | 2006 | * Exec consumerd. |
8c0faa1d | 2007 | */ |
daee5345 | 2008 | if (opt_verbose_consumer) { |
53086306 DG |
2009 | verbosity = "--verbose"; |
2010 | } else { | |
2011 | verbosity = "--quiet"; | |
2012 | } | |
3bd1e081 MD |
2013 | switch (consumer_data->type) { |
2014 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2015 | /* |
c7704d57 DG |
2016 | * Find out which consumerd to execute. We will first try the |
2017 | * 64-bit path, then the sessiond's installation directory, and | |
2018 | * fallback on the 32-bit one, | |
94c55f17 | 2019 | */ |
63a799e8 AM |
2020 | DBG3("Looking for a kernel consumer at these locations:"); |
2021 | DBG3(" 1) %s", consumerd64_bin); | |
2022 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2023 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2024 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2025 | DBG3("Found location #1"); |
94c55f17 | 2026 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2027 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2028 | DBG3("Found location #2"); |
94c55f17 | 2029 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2030 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2031 | DBG3("Found location #3"); |
eb1e0bd4 | 2032 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2033 | } else { |
63a799e8 | 2034 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2035 | break; |
2036 | } | |
2037 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
76f3e2db DG |
2038 | if (consumer_debug_valgrind) { |
2039 | execl("/usr/bin/valgrind", | |
2040 | "valgrind", "--leak-check=full", "--show-reachable=yes", | |
2041 | "--tool=memcheck", "--track-fds=yes", | |
2042 | "--log-file=/tmp/valgrind.kconsumer.log", | |
2043 | consumer_to_use, verbosity, "-k", | |
2044 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2045 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2046 | NULL); | |
2047 | } else { | |
2048 | execl(consumer_to_use, "lttng-consumerd", verbosity, "-k", | |
2049 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2050 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2051 | NULL); | |
2052 | } | |
3bd1e081 | 2053 | break; |
7753dea8 MD |
2054 | case LTTNG_CONSUMER64_UST: |
2055 | { | |
b1e0b6b6 | 2056 | char *tmpnew = NULL; |
8f4905da MD |
2057 | |
2058 | if (consumerd64_libdir[0] != '\0') { | |
2059 | char *tmp; | |
2060 | size_t tmplen; | |
2061 | ||
2062 | tmp = getenv("LD_LIBRARY_PATH"); | |
2063 | if (!tmp) { | |
2064 | tmp = ""; | |
2065 | } | |
2066 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2067 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2068 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2069 | if (!tmpnew) { | |
2070 | ret = -ENOMEM; | |
2071 | goto error; | |
2072 | } | |
2073 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2074 | strcat(tmpnew, consumerd64_libdir); | |
2075 | if (tmp[0] != '\0') { | |
2076 | strcat(tmpnew, ":"); | |
2077 | strcat(tmpnew, tmp); | |
2078 | } | |
2079 | ret = putenv(tmpnew); | |
2080 | if (ret) { | |
2081 | ret = -errno; | |
c6f76da9 | 2082 | free(tmpnew); |
8f4905da MD |
2083 | goto error; |
2084 | } | |
2085 | } | |
94c55f17 | 2086 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
76f3e2db DG |
2087 | if (consumer_debug_valgrind) { |
2088 | ret = execl("/usr/bin/valgrind", | |
2089 | "valgrind", "--leak-check=full", "--show-reachable=yes", | |
2090 | "--tool=memcheck", "--track-fds=yes", | |
2091 | "--log-file=/tmp/valgrind.ust64consumer.log", | |
2092 | consumerd64_bin, verbosity, "-u", | |
2093 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2094 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2095 | NULL); | |
2096 | } else { | |
2097 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", | |
2098 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2099 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2100 | NULL); | |
2101 | } | |
8f4905da MD |
2102 | if (consumerd64_libdir[0] != '\0') { |
2103 | free(tmpnew); | |
2104 | } | |
2105 | if (ret) { | |
2106 | goto error; | |
2107 | } | |
3bd1e081 | 2108 | break; |
7753dea8 MD |
2109 | } |
2110 | case LTTNG_CONSUMER32_UST: | |
2111 | { | |
937dde8e | 2112 | char *tmpnew = NULL; |
8f4905da MD |
2113 | |
2114 | if (consumerd32_libdir[0] != '\0') { | |
2115 | char *tmp; | |
2116 | size_t tmplen; | |
2117 | ||
2118 | tmp = getenv("LD_LIBRARY_PATH"); | |
2119 | if (!tmp) { | |
2120 | tmp = ""; | |
2121 | } | |
2122 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2123 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2124 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2125 | if (!tmpnew) { | |
2126 | ret = -ENOMEM; | |
2127 | goto error; | |
2128 | } | |
2129 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2130 | strcat(tmpnew, consumerd32_libdir); | |
2131 | if (tmp[0] != '\0') { | |
2132 | strcat(tmpnew, ":"); | |
2133 | strcat(tmpnew, tmp); | |
2134 | } | |
2135 | ret = putenv(tmpnew); | |
2136 | if (ret) { | |
2137 | ret = -errno; | |
c6f76da9 | 2138 | free(tmpnew); |
8f4905da MD |
2139 | goto error; |
2140 | } | |
2141 | } | |
94c55f17 | 2142 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
76f3e2db DG |
2143 | if (consumer_debug_valgrind) { |
2144 | ret = execl("/usr/bin/valgrind", | |
2145 | "valgrind", "--leak-check=full", "--show-reachable=yes", | |
2146 | "--tool=memcheck", "--track-fds=yes", | |
2147 | "--log-file=/tmp/valgrind.ust32consumer.log", | |
2148 | consumerd32_bin, verbosity, "-u", | |
2149 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2150 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2151 | NULL); | |
2152 | } else { | |
2153 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", | |
2154 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2155 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
2156 | NULL); | |
2157 | } | |
8f4905da MD |
2158 | if (consumerd32_libdir[0] != '\0') { |
2159 | free(tmpnew); | |
2160 | } | |
2161 | if (ret) { | |
2162 | goto error; | |
2163 | } | |
7753dea8 MD |
2164 | break; |
2165 | } | |
3bd1e081 | 2166 | default: |
76d7553f | 2167 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2168 | exit(EXIT_FAILURE); |
2169 | } | |
8c0faa1d | 2170 | if (errno != 0) { |
76d7553f | 2171 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2172 | } |
2173 | exit(EXIT_FAILURE); | |
2174 | } else if (pid > 0) { | |
2175 | ret = pid; | |
8c0faa1d | 2176 | } else { |
76d7553f | 2177 | PERROR("start consumer fork"); |
8c0faa1d | 2178 | ret = -errno; |
8c0faa1d | 2179 | } |
8f4905da | 2180 | error: |
8c0faa1d DG |
2181 | return ret; |
2182 | } | |
2183 | ||
693bd40b | 2184 | /* |
3bd1e081 | 2185 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2186 | */ |
3bd1e081 | 2187 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2188 | { |
c617c0c6 | 2189 | int ret; |
edb8b045 DG |
2190 | |
2191 | /* | |
2192 | * Set the listen() state on the socket since there is a possible race | |
2193 | * between the exec() of the consumer daemon and this call if place in the | |
2194 | * consumer thread. See bug #366 for more details. | |
2195 | */ | |
2196 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2197 | if (ret < 0) { | |
2198 | goto error; | |
2199 | } | |
693bd40b | 2200 | |
3bd1e081 MD |
2201 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2202 | if (consumer_data->pid != 0) { | |
2203 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2204 | goto end; |
2205 | } | |
693bd40b | 2206 | |
3bd1e081 | 2207 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2208 | if (ret < 0) { |
3bd1e081 MD |
2209 | ERR("Spawning consumerd failed"); |
2210 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2211 | goto error; |
693bd40b | 2212 | } |
c49dc785 | 2213 | |
3bd1e081 MD |
2214 | /* Setting up the consumer_data pid */ |
2215 | consumer_data->pid = ret; | |
48842b30 | 2216 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2217 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2218 | |
3bd1e081 MD |
2219 | DBG2("Spawning consumer control thread"); |
2220 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2221 | if (ret < 0) { |
3bd1e081 | 2222 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2223 | goto error; |
2224 | } | |
2225 | ||
c49dc785 | 2226 | end: |
693bd40b DG |
2227 | return 0; |
2228 | ||
2229 | error: | |
331744e3 | 2230 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2231 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2232 | int err; |
2233 | ||
edb8b045 DG |
2234 | err = close(consumer_data->err_sock); |
2235 | if (err < 0) { | |
2236 | PERROR("close consumer data error socket"); | |
2237 | } | |
2238 | } | |
693bd40b DG |
2239 | return ret; |
2240 | } | |
2241 | ||
44a5e5eb | 2242 | /* |
139ac872 MD |
2243 | * Compute health status of each consumer. If one of them is zero (bad |
2244 | * state), we return 0. | |
44a5e5eb DG |
2245 | */ |
2246 | static int check_consumer_health(void) | |
2247 | { | |
2248 | int ret; | |
2249 | ||
927ca06a | 2250 | ret = health_check_state(HEALTH_TYPE_CONSUMER); |
44a5e5eb DG |
2251 | |
2252 | DBG3("Health consumer check %d", ret); | |
2253 | ||
2254 | return ret; | |
2255 | } | |
2256 | ||
b73401da | 2257 | /* |
096102bd | 2258 | * Setup necessary data for kernel tracer action. |
b73401da | 2259 | */ |
096102bd | 2260 | static int init_kernel_tracer(void) |
b73401da DG |
2261 | { |
2262 | int ret; | |
b73401da | 2263 | |
096102bd DG |
2264 | /* Modprobe lttng kernel modules */ |
2265 | ret = modprobe_lttng_control(); | |
b73401da | 2266 | if (ret < 0) { |
b73401da DG |
2267 | goto error; |
2268 | } | |
2269 | ||
096102bd DG |
2270 | /* Open debugfs lttng */ |
2271 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2272 | if (kernel_tracer_fd < 0) { | |
2273 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2274 | ret = -1; |
2275 | goto error_open; | |
54d01ffb DG |
2276 | } |
2277 | ||
2f77fc4b DG |
2278 | /* Validate kernel version */ |
2279 | ret = kernel_validate_version(kernel_tracer_fd); | |
2280 | if (ret < 0) { | |
2281 | goto error_version; | |
b551a063 | 2282 | } |
54d01ffb | 2283 | |
2f77fc4b DG |
2284 | ret = modprobe_lttng_data(); |
2285 | if (ret < 0) { | |
2286 | goto error_modules; | |
54d01ffb DG |
2287 | } |
2288 | ||
2f77fc4b DG |
2289 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2290 | return 0; | |
2291 | ||
2292 | error_version: | |
2293 | modprobe_remove_lttng_control(); | |
2294 | ret = close(kernel_tracer_fd); | |
2295 | if (ret) { | |
2296 | PERROR("close"); | |
b551a063 | 2297 | } |
2f77fc4b | 2298 | kernel_tracer_fd = -1; |
f73fabfd | 2299 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2300 | |
2f77fc4b DG |
2301 | error_modules: |
2302 | ret = close(kernel_tracer_fd); | |
2303 | if (ret) { | |
2304 | PERROR("close"); | |
b551a063 | 2305 | } |
54d01ffb | 2306 | |
2f77fc4b DG |
2307 | error_open: |
2308 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2309 | |
2310 | error: | |
2f77fc4b DG |
2311 | WARN("No kernel tracer available"); |
2312 | kernel_tracer_fd = -1; | |
2313 | if (!is_root) { | |
f73fabfd | 2314 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2315 | } else { |
f73fabfd | 2316 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2317 | } |
54d01ffb DG |
2318 | } |
2319 | ||
2f77fc4b | 2320 | |
54d01ffb | 2321 | /* |
2f77fc4b DG |
2322 | * Copy consumer output from the tracing session to the domain session. The |
2323 | * function also applies the right modification on a per domain basis for the | |
2324 | * trace files destination directory. | |
36b588ed MD |
2325 | * |
2326 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2327 | */ |
2f77fc4b | 2328 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2329 | { |
2330 | int ret; | |
2f77fc4b DG |
2331 | const char *dir_name; |
2332 | struct consumer_output *consumer; | |
2333 | ||
2334 | assert(session); | |
2335 | assert(session->consumer); | |
54d01ffb | 2336 | |
b551a063 DG |
2337 | switch (domain) { |
2338 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2339 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2340 | /* |
2341 | * XXX: We should audit the session creation and what this function | |
2342 | * does "extra" in order to avoid a destroy since this function is used | |
2343 | * in the domain session creation (kernel and ust) only. Same for UST | |
2344 | * domain. | |
2345 | */ | |
2346 | if (session->kernel_session->consumer) { | |
2347 | consumer_destroy_output(session->kernel_session->consumer); | |
2348 | } | |
2f77fc4b DG |
2349 | session->kernel_session->consumer = |
2350 | consumer_copy_output(session->consumer); | |
2351 | /* Ease our life a bit for the next part */ | |
2352 | consumer = session->kernel_session->consumer; | |
2353 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2354 | break; |
2355 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2356 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2357 | if (session->ust_session->consumer) { |
2358 | consumer_destroy_output(session->ust_session->consumer); | |
2359 | } | |
2f77fc4b DG |
2360 | session->ust_session->consumer = |
2361 | consumer_copy_output(session->consumer); | |
2362 | /* Ease our life a bit for the next part */ | |
2363 | consumer = session->ust_session->consumer; | |
2364 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2365 | break; |
2366 | default: | |
f73fabfd | 2367 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2368 | goto error; |
2369 | } | |
2370 | ||
2f77fc4b | 2371 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2372 | strncat(consumer->subdir, dir_name, |
2373 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2374 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2375 | ||
f73fabfd | 2376 | ret = LTTNG_OK; |
54d01ffb DG |
2377 | |
2378 | error: | |
2379 | return ret; | |
2380 | } | |
2381 | ||
00e2e675 | 2382 | /* |
2f77fc4b | 2383 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2384 | * |
2385 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2386 | */ |
2f77fc4b DG |
2387 | static int create_ust_session(struct ltt_session *session, |
2388 | struct lttng_domain *domain) | |
00e2e675 DG |
2389 | { |
2390 | int ret; | |
2f77fc4b | 2391 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2392 | |
a4b92340 | 2393 | assert(session); |
2f77fc4b DG |
2394 | assert(domain); |
2395 | assert(session->consumer); | |
a4b92340 | 2396 | |
2f77fc4b DG |
2397 | switch (domain->type) { |
2398 | case LTTNG_DOMAIN_UST: | |
2399 | break; | |
2400 | default: | |
2401 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2402 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2403 | goto error; |
2404 | } | |
2405 | ||
2f77fc4b DG |
2406 | DBG("Creating UST session"); |
2407 | ||
dec56f6c | 2408 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2409 | if (lus == NULL) { |
f73fabfd | 2410 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2411 | goto error; |
2412 | } | |
2413 | ||
2f77fc4b DG |
2414 | lus->uid = session->uid; |
2415 | lus->gid = session->gid; | |
2bba9e53 | 2416 | lus->output_traces = session->output_traces; |
2f77fc4b | 2417 | session->ust_session = lus; |
00e2e675 | 2418 | |
2f77fc4b DG |
2419 | /* Copy session output to the newly created UST session */ |
2420 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2421 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2422 | goto error; |
2423 | } | |
2424 | ||
f73fabfd | 2425 | return LTTNG_OK; |
00e2e675 DG |
2426 | |
2427 | error: | |
2f77fc4b DG |
2428 | free(lus); |
2429 | session->ust_session = NULL; | |
00e2e675 DG |
2430 | return ret; |
2431 | } | |
2432 | ||
2433 | /* | |
2f77fc4b | 2434 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2435 | */ |
2f77fc4b | 2436 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2437 | { |
2438 | int ret; | |
a4b92340 | 2439 | |
2f77fc4b | 2440 | DBG("Creating kernel session"); |
00e2e675 | 2441 | |
2f77fc4b DG |
2442 | ret = kernel_create_session(session, kernel_tracer_fd); |
2443 | if (ret < 0) { | |
f73fabfd | 2444 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2445 | goto error; |
2446 | } | |
2447 | ||
2f77fc4b DG |
2448 | /* Code flow safety */ |
2449 | assert(session->kernel_session); | |
2450 | ||
2451 | /* Copy session output to the newly created Kernel session */ | |
2452 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2453 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2454 | goto error; |
2455 | } | |
2456 | ||
2f77fc4b DG |
2457 | /* Create directory(ies) on local filesystem. */ |
2458 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2459 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2460 | ret = run_as_mkdir_recursive( | |
2461 | session->kernel_session->consumer->dst.trace_path, | |
2462 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2463 | if (ret < 0) { | |
2464 | if (ret != -EEXIST) { | |
2465 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2466 | goto error; |
2467 | } | |
00e2e675 | 2468 | } |
2f77fc4b | 2469 | } |
00e2e675 | 2470 | |
2f77fc4b DG |
2471 | session->kernel_session->uid = session->uid; |
2472 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2473 | session->kernel_session->output_traces = session->output_traces; |
00e2e675 | 2474 | |
f73fabfd | 2475 | return LTTNG_OK; |
00e2e675 | 2476 | |
2f77fc4b DG |
2477 | error: |
2478 | trace_kernel_destroy_session(session->kernel_session); | |
2479 | session->kernel_session = NULL; | |
2480 | return ret; | |
2481 | } | |
00e2e675 | 2482 | |
2f77fc4b DG |
2483 | /* |
2484 | * Count number of session permitted by uid/gid. | |
2485 | */ | |
2486 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2487 | { | |
2488 | unsigned int i = 0; | |
2489 | struct ltt_session *session; | |
07424f16 | 2490 | |
2f77fc4b DG |
2491 | DBG("Counting number of available session for UID %d GID %d", |
2492 | uid, gid); | |
2493 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2494 | /* |
2f77fc4b | 2495 | * Only list the sessions the user can control. |
00e2e675 | 2496 | */ |
2f77fc4b DG |
2497 | if (!session_access_ok(session, uid, gid)) { |
2498 | continue; | |
2499 | } | |
2500 | i++; | |
a4b92340 | 2501 | } |
2f77fc4b | 2502 | return i; |
00e2e675 DG |
2503 | } |
2504 | ||
54d01ffb DG |
2505 | /* |
2506 | * Process the command requested by the lttng client within the command | |
2507 | * context structure. This function make sure that the return structure (llm) | |
2508 | * is set and ready for transmission before returning. | |
2509 | * | |
2510 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2511 | * |
2512 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2513 | * |
2514 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2515 | */ |
53a80697 MD |
2516 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2517 | int *sock_error) | |
54d01ffb | 2518 | { |
f73fabfd | 2519 | int ret = LTTNG_OK; |
44d3bd01 | 2520 | int need_tracing_session = 1; |
2e09ba09 | 2521 | int need_domain; |
54d01ffb DG |
2522 | |
2523 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2524 | ||
53a80697 MD |
2525 | *sock_error = 0; |
2526 | ||
2e09ba09 MD |
2527 | switch (cmd_ctx->lsm->cmd_type) { |
2528 | case LTTNG_CREATE_SESSION: | |
2529 | case LTTNG_DESTROY_SESSION: | |
2530 | case LTTNG_LIST_SESSIONS: | |
2531 | case LTTNG_LIST_DOMAINS: | |
2532 | case LTTNG_START_TRACE: | |
2533 | case LTTNG_STOP_TRACE: | |
6d805429 | 2534 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2535 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2536 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2537 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2538 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2539 | need_domain = 0; |
3aace903 | 2540 | break; |
2e09ba09 MD |
2541 | default: |
2542 | need_domain = 1; | |
2543 | } | |
2544 | ||
2545 | if (opt_no_kernel && need_domain | |
2546 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2547 | if (!is_root) { |
f73fabfd | 2548 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2549 | } else { |
f73fabfd | 2550 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2551 | } |
4fba7219 DG |
2552 | goto error; |
2553 | } | |
2554 | ||
8d3113b2 DG |
2555 | /* Deny register consumer if we already have a spawned consumer. */ |
2556 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2557 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2558 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2559 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2560 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2561 | goto error; |
2562 | } | |
2563 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2564 | } | |
2565 | ||
54d01ffb DG |
2566 | /* |
2567 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2568 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2569 | * command. |
2570 | */ | |
2571 | switch(cmd_ctx->lsm->cmd_type) { | |
2572 | case LTTNG_LIST_SESSIONS: | |
2573 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2574 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2575 | case LTTNG_LIST_DOMAINS: |
2576 | case LTTNG_LIST_CHANNELS: | |
2577 | case LTTNG_LIST_EVENTS: | |
2578 | break; | |
2579 | default: | |
2580 | /* Setup lttng message with no payload */ | |
2581 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2582 | if (ret < 0) { | |
2583 | /* This label does not try to unlock the session */ | |
2584 | goto init_setup_error; | |
2585 | } | |
2586 | } | |
2587 | ||
2588 | /* Commands that DO NOT need a session. */ | |
2589 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2590 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2591 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2592 | case LTTNG_LIST_SESSIONS: |
2593 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2594 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2595 | need_tracing_session = 0; |
54d01ffb DG |
2596 | break; |
2597 | default: | |
2598 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2599 | /* |
2600 | * We keep the session list lock across _all_ commands | |
2601 | * for now, because the per-session lock does not | |
2602 | * handle teardown properly. | |
2603 | */ | |
74babd95 | 2604 | session_lock_list(); |
54d01ffb DG |
2605 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2606 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2607 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2608 | goto error; |
2609 | } else { | |
2610 | /* Acquire lock for the session */ | |
2611 | session_lock(cmd_ctx->session); | |
2612 | } | |
2613 | break; | |
2614 | } | |
b389abbe | 2615 | |
2e09ba09 MD |
2616 | if (!need_domain) { |
2617 | goto skip_domain; | |
2618 | } | |
a4b92340 | 2619 | |
54d01ffb DG |
2620 | /* |
2621 | * Check domain type for specific "pre-action". | |
2622 | */ | |
2623 | switch (cmd_ctx->lsm->domain.type) { | |
2624 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2625 | if (!is_root) { |
f73fabfd | 2626 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2627 | goto error; |
2628 | } | |
2629 | ||
54d01ffb | 2630 | /* Kernel tracer check */ |
a4b35e07 | 2631 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2632 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2633 | ret = init_kernel_tracer(); |
2634 | if (ret != 0) { | |
54d01ffb DG |
2635 | goto error; |
2636 | } | |
2637 | } | |
5eb91c98 | 2638 | |
5c827ce0 DG |
2639 | /* Consumer is in an ERROR state. Report back to client */ |
2640 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2641 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2642 | goto error; |
2643 | } | |
2644 | ||
54d01ffb | 2645 | /* Need a session for kernel command */ |
44d3bd01 | 2646 | if (need_tracing_session) { |
54d01ffb | 2647 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2648 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2649 | if (ret < 0) { |
f73fabfd | 2650 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2651 | goto error; |
2652 | } | |
b389abbe | 2653 | } |
7d29a247 | 2654 | |
54d01ffb | 2655 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2656 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2657 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2658 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2659 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2660 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2661 | if (ret < 0) { |
f73fabfd | 2662 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2663 | goto error; |
950131af | 2664 | } |
5c827ce0 | 2665 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2666 | } else { |
2667 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2668 | } |
173af62f | 2669 | |
a4b92340 DG |
2670 | /* |
2671 | * The consumer was just spawned so we need to add the socket to | |
2672 | * the consumer output of the session if exist. | |
2673 | */ | |
2674 | ret = consumer_create_socket(&kconsumer_data, | |
2675 | cmd_ctx->session->kernel_session->consumer); | |
2676 | if (ret < 0) { | |
2677 | goto error; | |
173af62f | 2678 | } |
0d0c377a | 2679 | } |
5c827ce0 | 2680 | |
54d01ffb | 2681 | break; |
2bdd86d4 | 2682 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2683 | { |
5c827ce0 DG |
2684 | /* Consumer is in an ERROR state. Report back to client */ |
2685 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2686 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2687 | goto error; |
2688 | } | |
2689 | ||
44d3bd01 | 2690 | if (need_tracing_session) { |
a4b92340 | 2691 | /* Create UST session if none exist. */ |
f6a9efaa | 2692 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2693 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2694 | &cmd_ctx->lsm->domain); |
f73fabfd | 2695 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2696 | goto error; |
2697 | } | |
2698 | } | |
00e2e675 | 2699 | |
7753dea8 MD |
2700 | /* Start the UST consumer daemons */ |
2701 | /* 64-bit */ | |
2702 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2703 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2704 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2705 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2706 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2707 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2708 | if (ret < 0) { |
f73fabfd | 2709 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2710 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2711 | goto error; |
2712 | } | |
48842b30 | 2713 | |
173af62f | 2714 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2715 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2716 | } else { |
7753dea8 MD |
2717 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2718 | } | |
173af62f DG |
2719 | |
2720 | /* | |
2721 | * Setup socket for consumer 64 bit. No need for atomic access | |
2722 | * since it was set above and can ONLY be set in this thread. | |
2723 | */ | |
a4b92340 DG |
2724 | ret = consumer_create_socket(&ustconsumer64_data, |
2725 | cmd_ctx->session->ust_session->consumer); | |
2726 | if (ret < 0) { | |
2727 | goto error; | |
173af62f DG |
2728 | } |
2729 | ||
7753dea8 | 2730 | /* 32-bit */ |
fc7a59ce | 2731 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2732 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2733 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2734 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2735 | ret = start_consumerd(&ustconsumer32_data); | |
2736 | if (ret < 0) { | |
f73fabfd | 2737 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2738 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2739 | goto error; |
2740 | } | |
5c827ce0 | 2741 | |
173af62f | 2742 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2743 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2744 | } else { |
2745 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2746 | } |
173af62f DG |
2747 | |
2748 | /* | |
2749 | * Setup socket for consumer 64 bit. No need for atomic access | |
2750 | * since it was set above and can ONLY be set in this thread. | |
2751 | */ | |
a4b92340 DG |
2752 | ret = consumer_create_socket(&ustconsumer32_data, |
2753 | cmd_ctx->session->ust_session->consumer); | |
2754 | if (ret < 0) { | |
2755 | goto error; | |
173af62f | 2756 | } |
44d3bd01 DG |
2757 | } |
2758 | break; | |
48842b30 | 2759 | } |
54d01ffb | 2760 | default: |
54d01ffb DG |
2761 | break; |
2762 | } | |
2e09ba09 | 2763 | skip_domain: |
33a2b854 | 2764 | |
5c827ce0 DG |
2765 | /* Validate consumer daemon state when start/stop trace command */ |
2766 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2767 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2768 | switch (cmd_ctx->lsm->domain.type) { | |
2769 | case LTTNG_DOMAIN_UST: | |
2770 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2771 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2772 | goto error; |
2773 | } | |
2774 | break; | |
2775 | case LTTNG_DOMAIN_KERNEL: | |
2776 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2777 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2778 | goto error; |
2779 | } | |
2780 | break; | |
2781 | } | |
2782 | } | |
2783 | ||
8e0af1b4 MD |
2784 | /* |
2785 | * Check that the UID or GID match that of the tracing session. | |
2786 | * The root user can interact with all sessions. | |
2787 | */ | |
2788 | if (need_tracing_session) { | |
2789 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2790 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2791 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2792 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2793 | goto error; |
2794 | } | |
2795 | } | |
2796 | ||
ffe60014 DG |
2797 | /* |
2798 | * Send relayd information to consumer as soon as we have a domain and a | |
2799 | * session defined. | |
2800 | */ | |
2801 | if (cmd_ctx->session && need_domain) { | |
2802 | /* | |
2803 | * Setup relayd if not done yet. If the relayd information was already | |
2804 | * sent to the consumer, this call will gracefully return. | |
2805 | */ | |
2806 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2807 | if (ret != LTTNG_OK) { | |
2808 | goto error; | |
2809 | } | |
2810 | } | |
2811 | ||
54d01ffb DG |
2812 | /* Process by command type */ |
2813 | switch (cmd_ctx->lsm->cmd_type) { | |
2814 | case LTTNG_ADD_CONTEXT: | |
2815 | { | |
2816 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2817 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2818 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2819 | break; |
2820 | } | |
2821 | case LTTNG_DISABLE_CHANNEL: | |
2822 | { | |
2823 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2824 | cmd_ctx->lsm->u.disable.channel_name); | |
2825 | break; | |
2826 | } | |
2827 | case LTTNG_DISABLE_EVENT: | |
2828 | { | |
2829 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2830 | cmd_ctx->lsm->u.disable.channel_name, | |
2831 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2832 | break; |
2833 | } | |
54d01ffb DG |
2834 | case LTTNG_DISABLE_ALL_EVENT: |
2835 | { | |
2bdd86d4 | 2836 | DBG("Disabling all events"); |
54d01ffb DG |
2837 | |
2838 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2839 | cmd_ctx->lsm->u.disable.channel_name); | |
2840 | break; | |
2841 | } | |
2842 | case LTTNG_ENABLE_CHANNEL: | |
2843 | { | |
7972aab2 | 2844 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2845 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2846 | break; |
2847 | } | |
2848 | case LTTNG_ENABLE_EVENT: | |
2849 | { | |
7972aab2 | 2850 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
54d01ffb | 2851 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2852 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2853 | break; |
2854 | } | |
2855 | case LTTNG_ENABLE_ALL_EVENT: | |
2856 | { | |
2bdd86d4 | 2857 | DBG("Enabling all events"); |
54d01ffb | 2858 | |
7972aab2 | 2859 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 2860 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2861 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2862 | break; |
2863 | } | |
052da939 | 2864 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2865 | { |
9f19cc17 | 2866 | struct lttng_event *events; |
54d01ffb | 2867 | ssize_t nb_events; |
052da939 | 2868 | |
54d01ffb DG |
2869 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2870 | if (nb_events < 0) { | |
f73fabfd | 2871 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2872 | ret = -nb_events; |
2873 | goto error; | |
2ef84c95 DG |
2874 | } |
2875 | ||
2876 | /* | |
2877 | * Setup lttng message with payload size set to the event list size in | |
2878 | * bytes and then copy list into the llm payload. | |
2879 | */ | |
052da939 | 2880 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2881 | if (ret < 0) { |
052da939 | 2882 | free(events); |
2ef84c95 DG |
2883 | goto setup_error; |
2884 | } | |
2885 | ||
2886 | /* Copy event list into message payload */ | |
9f19cc17 | 2887 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2888 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2889 | |
9f19cc17 | 2890 | free(events); |
2ef84c95 | 2891 | |
f73fabfd | 2892 | ret = LTTNG_OK; |
2ef84c95 DG |
2893 | break; |
2894 | } | |
f37d259d MD |
2895 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2896 | { | |
2897 | struct lttng_event_field *fields; | |
2898 | ssize_t nb_fields; | |
2899 | ||
a4b92340 DG |
2900 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2901 | &fields); | |
f37d259d | 2902 | if (nb_fields < 0) { |
f73fabfd | 2903 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2904 | ret = -nb_fields; |
2905 | goto error; | |
2906 | } | |
2907 | ||
2908 | /* | |
2909 | * Setup lttng message with payload size set to the event list size in | |
2910 | * bytes and then copy list into the llm payload. | |
2911 | */ | |
a4b92340 DG |
2912 | ret = setup_lttng_msg(cmd_ctx, |
2913 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2914 | if (ret < 0) { |
2915 | free(fields); | |
2916 | goto setup_error; | |
2917 | } | |
2918 | ||
2919 | /* Copy event list into message payload */ | |
2920 | memcpy(cmd_ctx->llm->payload, fields, | |
2921 | sizeof(struct lttng_event_field) * nb_fields); | |
2922 | ||
2923 | free(fields); | |
2924 | ||
f73fabfd | 2925 | ret = LTTNG_OK; |
f37d259d MD |
2926 | break; |
2927 | } | |
00e2e675 DG |
2928 | case LTTNG_SET_CONSUMER_URI: |
2929 | { | |
a4b92340 DG |
2930 | size_t nb_uri, len; |
2931 | struct lttng_uri *uris; | |
2932 | ||
2933 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2934 | len = nb_uri * sizeof(struct lttng_uri); | |
2935 | ||
2936 | if (nb_uri == 0) { | |
f73fabfd | 2937 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2938 | goto error; |
2939 | } | |
2940 | ||
2941 | uris = zmalloc(len); | |
2942 | if (uris == NULL) { | |
f73fabfd | 2943 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2944 | goto error; |
2945 | } | |
2946 | ||
2947 | /* Receive variable len data */ | |
77c7c900 | 2948 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2949 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2950 | if (ret <= 0) { | |
2951 | DBG("No URIs received from client... continuing"); | |
2952 | *sock_error = 1; | |
f73fabfd | 2953 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2954 | free(uris); |
a4b92340 DG |
2955 | goto error; |
2956 | } | |
2957 | ||
00e2e675 | 2958 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2959 | nb_uri, uris); |
f73fabfd | 2960 | if (ret != LTTNG_OK) { |
b1d41407 | 2961 | free(uris); |
a4b92340 DG |
2962 | goto error; |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | * XXX: 0 means that this URI should be applied on the session. Should | |
2967 | * be a DOMAIN enuam. | |
2968 | */ | |
2969 | if (cmd_ctx->lsm->domain.type == 0) { | |
2970 | /* Add the URI for the UST session if a consumer is present. */ | |
2971 | if (cmd_ctx->session->ust_session && | |
2972 | cmd_ctx->session->ust_session->consumer) { | |
2973 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2974 | nb_uri, uris); | |
2975 | } else if (cmd_ctx->session->kernel_session && | |
2976 | cmd_ctx->session->kernel_session->consumer) { | |
2977 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2978 | cmd_ctx->session, nb_uri, uris); | |
2979 | } | |
2980 | } | |
2981 | ||
b1d41407 DG |
2982 | free(uris); |
2983 | ||
00e2e675 DG |
2984 | break; |
2985 | } | |
f3ed775e | 2986 | case LTTNG_START_TRACE: |
8c0faa1d | 2987 | { |
54d01ffb | 2988 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2989 | break; |
2990 | } | |
f3ed775e | 2991 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2992 | { |
54d01ffb | 2993 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2994 | break; |
2995 | } | |
5e16da05 MD |
2996 | case LTTNG_CREATE_SESSION: |
2997 | { | |
a4b92340 DG |
2998 | size_t nb_uri, len; |
2999 | struct lttng_uri *uris = NULL; | |
3000 | ||
3001 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3002 | len = nb_uri * sizeof(struct lttng_uri); | |
3003 | ||
3004 | if (nb_uri > 0) { | |
3005 | uris = zmalloc(len); | |
3006 | if (uris == NULL) { | |
f73fabfd | 3007 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3008 | goto error; |
3009 | } | |
3010 | ||
3011 | /* Receive variable len data */ | |
77c7c900 | 3012 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3013 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3014 | if (ret <= 0) { | |
3015 | DBG("No URIs received from client... continuing"); | |
3016 | *sock_error = 1; | |
f73fabfd | 3017 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3018 | free(uris); |
a4b92340 DG |
3019 | goto error; |
3020 | } | |
3021 | ||
3022 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3023 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3024 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3025 | free(uris); |
a4b92340 DG |
3026 | goto error; |
3027 | } | |
3028 | } | |
3029 | ||
3030 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
3031 | &cmd_ctx->creds); | |
3032 | ||
b1d41407 DG |
3033 | free(uris); |
3034 | ||
00e2e675 DG |
3035 | break; |
3036 | } | |
5e16da05 MD |
3037 | case LTTNG_DESTROY_SESSION: |
3038 | { | |
2f77fc4b | 3039 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3040 | |
3041 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3042 | cmd_ctx->session = NULL; |
5461b305 | 3043 | break; |
5e16da05 | 3044 | } |
9f19cc17 | 3045 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3046 | { |
54d01ffb DG |
3047 | ssize_t nb_dom; |
3048 | struct lttng_domain *domains; | |
5461b305 | 3049 | |
54d01ffb DG |
3050 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3051 | if (nb_dom < 0) { | |
f73fabfd | 3052 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3053 | ret = -nb_dom; |
3054 | goto error; | |
ce3d728c | 3055 | } |
520ff687 | 3056 | |
54d01ffb | 3057 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3058 | if (ret < 0) { |
ae9c20bc | 3059 | free(domains); |
5461b305 | 3060 | goto setup_error; |
520ff687 | 3061 | } |
57167058 | 3062 | |
54d01ffb DG |
3063 | /* Copy event list into message payload */ |
3064 | memcpy(cmd_ctx->llm->payload, domains, | |
3065 | nb_dom * sizeof(struct lttng_domain)); | |
3066 | ||
3067 | free(domains); | |
5e16da05 | 3068 | |
f73fabfd | 3069 | ret = LTTNG_OK; |
5e16da05 MD |
3070 | break; |
3071 | } | |
9f19cc17 | 3072 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3073 | { |
6775595e | 3074 | int nb_chan; |
54d01ffb DG |
3075 | struct lttng_channel *channels; |
3076 | ||
b551a063 DG |
3077 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3078 | cmd_ctx->session, &channels); | |
54d01ffb | 3079 | if (nb_chan < 0) { |
f73fabfd | 3080 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3081 | ret = -nb_chan; |
3082 | goto error; | |
5461b305 | 3083 | } |
ca95a216 | 3084 | |
54d01ffb | 3085 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3086 | if (ret < 0) { |
ae9c20bc | 3087 | free(channels); |
5461b305 DG |
3088 | goto setup_error; |
3089 | } | |
9f19cc17 | 3090 | |
54d01ffb DG |
3091 | /* Copy event list into message payload */ |
3092 | memcpy(cmd_ctx->llm->payload, channels, | |
3093 | nb_chan * sizeof(struct lttng_channel)); | |
3094 | ||
3095 | free(channels); | |
9f19cc17 | 3096 | |
f73fabfd | 3097 | ret = LTTNG_OK; |
5461b305 | 3098 | break; |
5e16da05 | 3099 | } |
9f19cc17 | 3100 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3101 | { |
b551a063 | 3102 | ssize_t nb_event; |
684d34d2 | 3103 | struct lttng_event *events = NULL; |
9f19cc17 | 3104 | |
b551a063 | 3105 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3106 | cmd_ctx->lsm->u.list.channel_name, &events); |
3107 | if (nb_event < 0) { | |
f73fabfd | 3108 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3109 | ret = -nb_event; |
3110 | goto error; | |
5461b305 | 3111 | } |
ca95a216 | 3112 | |
54d01ffb | 3113 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3114 | if (ret < 0) { |
ae9c20bc | 3115 | free(events); |
5461b305 DG |
3116 | goto setup_error; |
3117 | } | |
9f19cc17 | 3118 | |
54d01ffb DG |
3119 | /* Copy event list into message payload */ |
3120 | memcpy(cmd_ctx->llm->payload, events, | |
3121 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3122 | |
54d01ffb | 3123 | free(events); |
9f19cc17 | 3124 | |
f73fabfd | 3125 | ret = LTTNG_OK; |
5461b305 | 3126 | break; |
5e16da05 MD |
3127 | } |
3128 | case LTTNG_LIST_SESSIONS: | |
3129 | { | |
8e0af1b4 | 3130 | unsigned int nr_sessions; |
5461b305 | 3131 | |
8e0af1b4 | 3132 | session_lock_list(); |
730389d9 DG |
3133 | nr_sessions = lttng_sessions_count( |
3134 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3135 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3136 | |
8e0af1b4 | 3137 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3138 | if (ret < 0) { |
54d01ffb | 3139 | session_unlock_list(); |
5461b305 | 3140 | goto setup_error; |
e065084a | 3141 | } |
5e16da05 | 3142 | |
6c9cc2ab | 3143 | /* Filled the session array */ |
2f77fc4b | 3144 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3145 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3146 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3147 | |
54d01ffb | 3148 | session_unlock_list(); |
5e16da05 | 3149 | |
f73fabfd | 3150 | ret = LTTNG_OK; |
5e16da05 MD |
3151 | break; |
3152 | } | |
d0254c7c MD |
3153 | case LTTNG_CALIBRATE: |
3154 | { | |
54d01ffb DG |
3155 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3156 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3157 | break; |
3158 | } | |
d9800920 DG |
3159 | case LTTNG_REGISTER_CONSUMER: |
3160 | { | |
2f77fc4b DG |
3161 | struct consumer_data *cdata; |
3162 | ||
3163 | switch (cmd_ctx->lsm->domain.type) { | |
3164 | case LTTNG_DOMAIN_KERNEL: | |
3165 | cdata = &kconsumer_data; | |
3166 | break; | |
3167 | default: | |
f73fabfd | 3168 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3169 | goto error; |
3170 | } | |
3171 | ||
54d01ffb | 3172 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3173 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3174 | break; |
3175 | } | |
025faf73 | 3176 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
3177 | { |
3178 | struct lttng_filter_bytecode *bytecode; | |
3179 | ||
025faf73 | 3180 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 3181 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3182 | goto error; |
3183 | } | |
52df2401 MD |
3184 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
3185 | ret = LTTNG_ERR_FILTER_INVAL; | |
3186 | goto error; | |
3187 | } | |
025faf73 | 3188 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 3189 | if (!bytecode) { |
f73fabfd | 3190 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
3191 | goto error; |
3192 | } | |
3193 | /* Receive var. len. data */ | |
3194 | DBG("Receiving var len data from client ..."); | |
3195 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 3196 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
3197 | if (ret <= 0) { |
3198 | DBG("Nothing recv() from client var len data... continuing"); | |
3199 | *sock_error = 1; | |
f73fabfd | 3200 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3201 | goto error; |
3202 | } | |
3203 | ||
3204 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 3205 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 3206 | free(bytecode); |
f73fabfd | 3207 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3208 | goto error; |
3209 | } | |
3210 | ||
7972aab2 | 3211 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
025faf73 DG |
3212 | cmd_ctx->lsm->u.enable.channel_name, |
3213 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
3214 | break; |
3215 | } | |
6d805429 | 3216 | case LTTNG_DATA_PENDING: |
806e2684 | 3217 | { |
6d805429 | 3218 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3219 | break; |
3220 | } | |
da3c9ec1 DG |
3221 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3222 | { | |
6dc3064a DG |
3223 | struct lttcomm_lttng_output_id reply; |
3224 | ||
3225 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3226 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3227 | if (ret != LTTNG_OK) { | |
3228 | goto error; | |
3229 | } | |
3230 | ||
3231 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3232 | if (ret < 0) { | |
3233 | goto setup_error; | |
3234 | } | |
3235 | ||
3236 | /* Copy output list into message payload */ | |
3237 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3238 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3239 | break; |
3240 | } | |
3241 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3242 | { | |
6dc3064a DG |
3243 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3244 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3245 | break; |
3246 | } | |
3247 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3248 | { | |
6dc3064a DG |
3249 | ssize_t nb_output; |
3250 | struct lttng_snapshot_output *outputs = NULL; | |
3251 | ||
3252 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3253 | if (nb_output < 0) { | |
3254 | ret = -nb_output; | |
3255 | goto error; | |
3256 | } | |
3257 | ||
3258 | ret = setup_lttng_msg(cmd_ctx, | |
3259 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3260 | if (ret < 0) { | |
3261 | free(outputs); | |
3262 | goto setup_error; | |
3263 | } | |
3264 | ||
3265 | if (outputs) { | |
3266 | /* Copy output list into message payload */ | |
3267 | memcpy(cmd_ctx->llm->payload, outputs, | |
3268 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3269 | free(outputs); | |
3270 | } | |
3271 | ||
3272 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3273 | break; |
3274 | } | |
3275 | case LTTNG_SNAPSHOT_RECORD: | |
3276 | { | |
6dc3064a DG |
3277 | ret = cmd_snapshot_record(cmd_ctx->session, |
3278 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3279 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3280 | break; |
3281 | } | |
5e16da05 | 3282 | default: |
f73fabfd | 3283 | ret = LTTNG_ERR_UND; |
5461b305 | 3284 | break; |
fac6795d DG |
3285 | } |
3286 | ||
5461b305 | 3287 | error: |
5461b305 DG |
3288 | if (cmd_ctx->llm == NULL) { |
3289 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3290 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3291 | goto setup_error; |
3292 | } | |
3293 | } | |
54d01ffb | 3294 | /* Set return code */ |
5461b305 | 3295 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3296 | setup_error: |
b5541356 | 3297 | if (cmd_ctx->session) { |
54d01ffb | 3298 | session_unlock(cmd_ctx->session); |
b5541356 | 3299 | } |
256a5576 MD |
3300 | if (need_tracing_session) { |
3301 | session_unlock_list(); | |
3302 | } | |
54d01ffb | 3303 | init_setup_error: |
8028d920 | 3304 | return ret; |
fac6795d DG |
3305 | } |
3306 | ||
44a5e5eb DG |
3307 | /* |
3308 | * Thread managing health check socket. | |
3309 | */ | |
3310 | static void *thread_manage_health(void *data) | |
3311 | { | |
eb4a2943 | 3312 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3313 | uint32_t revents, nb_fd; |
3314 | struct lttng_poll_event events; | |
3315 | struct lttcomm_health_msg msg; | |
3316 | struct lttcomm_health_data reply; | |
3317 | ||
3318 | DBG("[thread] Manage health check started"); | |
3319 | ||
3320 | rcu_register_thread(); | |
3321 | ||
6d737ce4 DG |
3322 | /* We might hit an error path before this is created. */ |
3323 | lttng_poll_init(&events); | |
3cc04881 | 3324 | |
44a5e5eb DG |
3325 | /* Create unix socket */ |
3326 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3327 | if (sock < 0) { | |
3328 | ERR("Unable to create health check Unix socket"); | |
3329 | ret = -1; | |
3330 | goto error; | |
3331 | } | |
3332 | ||
b662582b DG |
3333 | /* |
3334 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3335 | * show must go on. | |
3336 | */ | |
3337 | (void) utils_set_fd_cloexec(sock); | |
3338 | ||
44a5e5eb DG |
3339 | ret = lttcomm_listen_unix_sock(sock); |
3340 | if (ret < 0) { | |
3341 | goto error; | |
3342 | } | |
3343 | ||
3344 | /* | |
3345 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3346 | * more will be added to this poll set. | |
3347 | */ | |
d0b96690 | 3348 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3349 | if (ret < 0) { |
3350 | goto error; | |
3351 | } | |
3352 | ||
3353 | /* Add the application registration socket */ | |
3354 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3355 | if (ret < 0) { | |
3356 | goto error; | |
3357 | } | |
3358 | ||
3359 | while (1) { | |
3360 | DBG("Health check ready"); | |
3361 | ||
44a5e5eb DG |
3362 | /* Inifinite blocking call, waiting for transmission */ |
3363 | restart: | |
3364 | ret = lttng_poll_wait(&events, -1); | |
3365 | if (ret < 0) { | |
3366 | /* | |
3367 | * Restart interrupted system call. | |
3368 | */ | |
3369 | if (errno == EINTR) { | |
3370 | goto restart; | |
3371 | } | |
3372 | goto error; | |
3373 | } | |
3374 | ||
0d9c5d77 DG |
3375 | nb_fd = ret; |
3376 | ||
44a5e5eb DG |
3377 | for (i = 0; i < nb_fd; i++) { |
3378 | /* Fetch once the poll data */ | |
3379 | revents = LTTNG_POLL_GETEV(&events, i); | |
3380 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3381 | ||
3382 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3383 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3384 | if (ret) { |
139ac872 MD |
3385 | err = 0; |
3386 | goto exit; | |
44a5e5eb DG |
3387 | } |
3388 | ||
3389 | /* Event on the registration socket */ | |
3390 | if (pollfd == sock) { | |
3391 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3392 | ERR("Health socket poll error"); | |
3393 | goto error; | |
3394 | } | |
3395 | } | |
3396 | } | |
3397 | ||
3398 | new_sock = lttcomm_accept_unix_sock(sock); | |
3399 | if (new_sock < 0) { | |
3400 | goto error; | |
3401 | } | |
3402 | ||
b662582b DG |
3403 | /* |
3404 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3405 | * show must go on. | |
3406 | */ | |
3407 | (void) utils_set_fd_cloexec(new_sock); | |
3408 | ||
44a5e5eb DG |
3409 | DBG("Receiving data from client for health..."); |
3410 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3411 | if (ret <= 0) { | |
3412 | DBG("Nothing recv() from client... continuing"); | |
3413 | ret = close(new_sock); | |
3414 | if (ret) { | |
3415 | PERROR("close"); | |
3416 | } | |
3417 | new_sock = -1; | |
3418 | continue; | |
3419 | } | |
3420 | ||
3421 | rcu_thread_online(); | |
3422 | ||
3423 | switch (msg.component) { | |
3424 | case LTTNG_HEALTH_CMD: | |
927ca06a | 3425 | reply.ret_code = health_check_state(HEALTH_TYPE_CMD); |
44a5e5eb | 3426 | break; |
139ac872 | 3427 | case LTTNG_HEALTH_APP_MANAGE: |
927ca06a | 3428 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE); |
139ac872 | 3429 | break; |
44a5e5eb | 3430 | case LTTNG_HEALTH_APP_REG: |
927ca06a | 3431 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG); |
44a5e5eb DG |
3432 | break; |
3433 | case LTTNG_HEALTH_KERNEL: | |
927ca06a | 3434 | reply.ret_code = health_check_state(HEALTH_TYPE_KERNEL); |
44a5e5eb DG |
3435 | break; |
3436 | case LTTNG_HEALTH_CONSUMER: | |
3437 | reply.ret_code = check_consumer_health(); | |
3438 | break; | |
0b2dc8df MD |
3439 | case LTTNG_HEALTH_HT_CLEANUP: |
3440 | reply.ret_code = health_check_state(HEALTH_TYPE_HT_CLEANUP); | |
3441 | break; | |
380e8d6f MD |
3442 | case LTTNG_HEALTH_APP_MANAGE_NOTIFY: |
3443 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE_NOTIFY); | |
3444 | break; | |
12e2b881 MD |
3445 | case LTTNG_HEALTH_APP_REG_DISPATCH: |
3446 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG_DISPATCH); | |
3447 | break; | |
44a5e5eb | 3448 | case LTTNG_HEALTH_ALL: |
44a5e5eb | 3449 | reply.ret_code = |
927ca06a DG |
3450 | health_check_state(HEALTH_TYPE_APP_MANAGE) && |
3451 | health_check_state(HEALTH_TYPE_APP_REG) && | |
3452 | health_check_state(HEALTH_TYPE_CMD) && | |
3453 | health_check_state(HEALTH_TYPE_KERNEL) && | |
0b2dc8df | 3454 | check_consumer_health() && |
380e8d6f | 3455 | health_check_state(HEALTH_TYPE_HT_CLEANUP) && |
12e2b881 MD |
3456 | health_check_state(HEALTH_TYPE_APP_MANAGE_NOTIFY) && |
3457 | health_check_state(HEALTH_TYPE_APP_REG_DISPATCH); | |
44a5e5eb DG |
3458 | break; |
3459 | default: | |
f73fabfd | 3460 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3461 | break; |
3462 | } | |
3463 | ||
3464 | /* | |
3465 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3466 | * the client where in the sessiond it is the opposite. Again, this is | |
3467 | * just to make things easier for us poor developer which enjoy a lot | |
3468 | * lazyness. | |
3469 | */ | |
3470 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3471 | reply.ret_code = !reply.ret_code; | |
3472 | } | |
3473 | ||
3474 | DBG2("Health check return value %d", reply.ret_code); | |
3475 | ||
3476 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3477 | if (ret < 0) { | |
3478 | ERR("Failed to send health data back to client"); | |
3479 | } | |
3480 | ||
3481 | /* End of transmission */ | |
3482 | ret = close(new_sock); | |
3483 | if (ret) { | |
3484 | PERROR("close"); | |
3485 | } | |
3486 | new_sock = -1; | |
3487 | } | |
3488 | ||
139ac872 | 3489 | exit: |
44a5e5eb | 3490 | error: |
139ac872 MD |
3491 | if (err) { |
3492 | ERR("Health error occurred in %s", __func__); | |
3493 | } | |
44a5e5eb DG |
3494 | DBG("Health check thread dying"); |
3495 | unlink(health_unix_sock_path); | |
3496 | if (sock >= 0) { | |
3497 | ret = close(sock); | |
3498 | if (ret) { | |
3499 | PERROR("close"); | |
3500 | } | |
3501 | } | |
44a5e5eb DG |
3502 | |
3503 | lttng_poll_clean(&events); | |
3504 | ||
3505 | rcu_unregister_thread(); | |
3506 | return NULL; | |
3507 | } | |
3508 | ||
1d4b027a | 3509 | /* |
d063d709 DG |
3510 | * This thread manage all clients request using the unix client socket for |
3511 | * communication. | |
1d4b027a DG |
3512 | */ |
3513 | static void *thread_manage_clients(void *data) | |
3514 | { | |
139ac872 | 3515 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3516 | int sock_error; |
5eb91c98 | 3517 | uint32_t revents, nb_fd; |
273ea72c | 3518 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3519 | struct lttng_poll_event events; |
1d4b027a DG |
3520 | |
3521 | DBG("[thread] Manage client started"); | |
3522 | ||
f6a9efaa DG |
3523 | rcu_register_thread(); |
3524 | ||
927ca06a DG |
3525 | health_register(HEALTH_TYPE_CMD); |
3526 | ||
6993eeb3 CB |
3527 | if (testpoint(thread_manage_clients)) { |
3528 | goto error_testpoint; | |
3529 | } | |
3530 | ||
840cb59c | 3531 | health_code_update(); |
44a5e5eb | 3532 | |
1d4b027a DG |
3533 | ret = lttcomm_listen_unix_sock(client_sock); |
3534 | if (ret < 0) { | |
35df2755 | 3535 | goto error_listen; |
1d4b027a DG |
3536 | } |
3537 | ||
5eb91c98 DG |
3538 | /* |
3539 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3540 | * more will be added to this poll set. | |
3541 | */ | |
d0b96690 | 3542 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3543 | if (ret < 0) { |
35df2755 | 3544 | goto error_create_poll; |
5eb91c98 | 3545 | } |
273ea72c | 3546 | |
5eb91c98 DG |
3547 | /* Add the application registration socket */ |
3548 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3549 | if (ret < 0) { | |
3550 | goto error; | |
3551 | } | |
273ea72c | 3552 | |
bbd973c2 DG |
3553 | /* |
3554 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3555 | */ |
3556 | if (opt_sig_parent) { | |
8db8d1dc | 3557 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3558 | } |
3559 | ||
6993eeb3 CB |
3560 | if (testpoint(thread_manage_clients_before_loop)) { |
3561 | goto error; | |
3562 | } | |
8ac94142 | 3563 | |
840cb59c | 3564 | health_code_update(); |
44a5e5eb | 3565 | |
1d4b027a | 3566 | while (1) { |
1d4b027a | 3567 | DBG("Accepting client command ..."); |
273ea72c DG |
3568 | |
3569 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3570 | restart: |
a78af745 | 3571 | health_poll_entry(); |
5eb91c98 | 3572 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3573 | health_poll_exit(); |
273ea72c | 3574 | if (ret < 0) { |
88f2b785 MD |
3575 | /* |
3576 | * Restart interrupted system call. | |
3577 | */ | |
3578 | if (errno == EINTR) { | |
3579 | goto restart; | |
3580 | } | |
273ea72c DG |
3581 | goto error; |
3582 | } | |
3583 | ||
0d9c5d77 DG |
3584 | nb_fd = ret; |
3585 | ||
5eb91c98 DG |
3586 | for (i = 0; i < nb_fd; i++) { |
3587 | /* Fetch once the poll data */ | |
3588 | revents = LTTNG_POLL_GETEV(&events, i); | |
3589 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3590 | ||
840cb59c | 3591 | health_code_update(); |
44a5e5eb | 3592 | |
5eb91c98 | 3593 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3594 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3595 | if (ret) { |
139ac872 MD |
3596 | err = 0; |
3597 | goto exit; | |
5eb91c98 DG |
3598 | } |
3599 | ||
3600 | /* Event on the registration socket */ | |
3601 | if (pollfd == client_sock) { | |
3602 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3603 | ERR("Client socket poll error"); | |
3604 | goto error; | |
3605 | } | |
3606 | } | |
3607 | } | |
3608 | ||
3609 | DBG("Wait for client response"); | |
3610 | ||
840cb59c | 3611 | health_code_update(); |
44a5e5eb | 3612 | |
5eb91c98 DG |
3613 | sock = lttcomm_accept_unix_sock(client_sock); |
3614 | if (sock < 0) { | |
273ea72c | 3615 | goto error; |
273ea72c DG |
3616 | } |
3617 | ||
b662582b DG |
3618 | /* |
3619 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3620 | * show must go on. | |
3621 | */ | |
3622 | (void) utils_set_fd_cloexec(sock); | |
3623 | ||
be040666 DG |
3624 | /* Set socket option for credentials retrieval */ |
3625 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3626 | if (ret < 0) { | |
3627 | goto error; | |
3628 | } | |
3629 | ||
5eb91c98 | 3630 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3631 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3632 | if (cmd_ctx == NULL) { |
76d7553f | 3633 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3634 | goto error; |
5eb91c98 | 3635 | } |
1d4b027a | 3636 | |
5eb91c98 | 3637 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3638 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3639 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3640 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3641 | goto error; |
3642 | } | |
1d4b027a | 3643 | |
5eb91c98 DG |
3644 | cmd_ctx->llm = NULL; |
3645 | cmd_ctx->session = NULL; | |
1d4b027a | 3646 | |
840cb59c | 3647 | health_code_update(); |
44a5e5eb | 3648 | |
5eb91c98 DG |
3649 | /* |
3650 | * Data is received from the lttng client. The struct | |
3651 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3652 | * the client. | |
3653 | */ | |
3654 | DBG("Receiving data from client ..."); | |
be040666 DG |
3655 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3656 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3657 | if (ret <= 0) { |
3658 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3659 | ret = close(sock); |
3660 | if (ret) { | |
3661 | PERROR("close"); | |
3662 | } | |
3663 | sock = -1; | |
a2c0da86 | 3664 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3665 | continue; |
3666 | } | |
1d4b027a | 3667 | |
840cb59c | 3668 | health_code_update(); |
44a5e5eb | 3669 | |
5eb91c98 DG |
3670 | // TODO: Validate cmd_ctx including sanity check for |
3671 | // security purpose. | |
f7776ea7 | 3672 | |
f6a9efaa | 3673 | rcu_thread_online(); |
5eb91c98 DG |
3674 | /* |
3675 | * This function dispatch the work to the kernel or userspace tracer | |
3676 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3677 | * informations for the client. The command context struct contains | |
3678 | * everything this function may needs. | |
3679 | */ | |
53a80697 | 3680 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3681 | rcu_thread_offline(); |
5eb91c98 | 3682 | if (ret < 0) { |
36134aa1 DG |
3683 | ret = close(sock); |
3684 | if (ret) { | |
3685 | PERROR("close"); | |
53a80697 | 3686 | } |
36134aa1 | 3687 | sock = -1; |
bbd973c2 | 3688 | /* |
5eb91c98 | 3689 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3690 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3691 | * (ENOMEM). Error detected but still accept |
3692 | * command, unless a socket error has been | |
3693 | * detected. | |
bbd973c2 | 3694 | */ |
bbd973c2 | 3695 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3696 | continue; |
3697 | } | |
d6e4fca4 | 3698 | |
840cb59c | 3699 | health_code_update(); |
44a5e5eb | 3700 | |
54d01ffb DG |
3701 | DBG("Sending response (size: %d, retcode: %s)", |
3702 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3703 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3704 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3705 | if (ret < 0) { |
3706 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3707 | } |
1d4b027a | 3708 | |
5eb91c98 | 3709 | /* End of transmission */ |
76d7553f MD |
3710 | ret = close(sock); |
3711 | if (ret) { | |
3712 | PERROR("close"); | |
3713 | } | |
3714 | sock = -1; | |
be040666 DG |
3715 | |
3716 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3717 | |
840cb59c | 3718 | health_code_update(); |
273ea72c DG |
3719 | } |
3720 | ||
139ac872 | 3721 | exit: |
5eb91c98 | 3722 | error: |
35df2755 CB |
3723 | if (sock >= 0) { |
3724 | ret = close(sock); | |
3725 | if (ret) { | |
3726 | PERROR("close"); | |
3727 | } | |
139ac872 | 3728 | } |
44a5e5eb | 3729 | |
35df2755 CB |
3730 | lttng_poll_clean(&events); |
3731 | clean_command_ctx(&cmd_ctx); | |
3732 | ||
3733 | error_listen: | |
3734 | error_create_poll: | |
6993eeb3 | 3735 | error_testpoint: |
273ea72c | 3736 | unlink(client_unix_sock_path); |
76d7553f MD |
3737 | if (client_sock >= 0) { |
3738 | ret = close(client_sock); | |
3739 | if (ret) { | |
3740 | PERROR("close"); | |
3741 | } | |
a4b35e07 | 3742 | } |
35df2755 CB |
3743 | |
3744 | if (err) { | |
840cb59c | 3745 | health_error(); |
35df2755 | 3746 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3747 | } |
273ea72c | 3748 | |
927ca06a | 3749 | health_unregister(); |
35df2755 CB |
3750 | |
3751 | DBG("Client thread dying"); | |
f6a9efaa DG |
3752 | |
3753 | rcu_unregister_thread(); | |
1d4b027a DG |
3754 | return NULL; |
3755 | } | |
3756 | ||
3757 | ||
fac6795d DG |
3758 | /* |
3759 | * usage function on stderr | |
3760 | */ | |
3761 | static void usage(void) | |
3762 | { | |
b716ce68 | 3763 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3764 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3765 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3766 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3767 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3768 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3769 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3770 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3771 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3772 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3773 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3774 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3775 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3776 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3777 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3778 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3779 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3780 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3781 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3782 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 3783 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 3784 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3785 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3786 | } |
3787 | ||
3788 | /* | |
3789 | * daemon argument parsing | |
3790 | */ | |
3791 | static int parse_args(int argc, char **argv) | |
3792 | { | |
3793 | int c; | |
3794 | ||
3795 | static struct option long_options[] = { | |
3796 | { "client-sock", 1, 0, 'c' }, | |
3797 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3798 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3799 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3800 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3801 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3802 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3803 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3804 | { "consumerd32-path", 1, 0, 'u' }, | |
3805 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3806 | { "consumerd64-path", 1, 0, 't' }, | |
3807 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3808 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3809 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3810 | { "help", 0, 0, 'h' }, |
3811 | { "group", 1, 0, 'g' }, | |
3812 | { "version", 0, 0, 'V' }, | |
75462a81 | 3813 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3814 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3815 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3816 | { "no-kernel", 0, 0, 'N' }, |
35f90c40 | 3817 | { "pidfile", 1, 0, 'p' }, |
fac6795d DG |
3818 | { NULL, 0, 0, 0 } |
3819 | }; | |
3820 | ||
3821 | while (1) { | |
3822 | int option_index = 0; | |
35f90c40 | 3823 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t:p:", |
54d01ffb | 3824 | long_options, &option_index); |
fac6795d DG |
3825 | if (c == -1) { |
3826 | break; | |
3827 | } | |
3828 | ||
3829 | switch (c) { | |
3830 | case 0: | |
3831 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3832 | if (optarg) { | |
3833 | fprintf(stderr, " with arg %s\n", optarg); | |
3834 | } | |
3835 | break; | |
b716ce68 | 3836 | case 'c': |
fac6795d DG |
3837 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3838 | break; | |
3839 | case 'a': | |
3840 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3841 | break; | |
3842 | case 'd': | |
3843 | opt_daemon = 1; | |
3844 | break; | |
3845 | case 'g': | |
fb09408a | 3846 | opt_tracing_group = optarg; |
fac6795d DG |
3847 | break; |
3848 | case 'h': | |
3849 | usage(); | |
3850 | exit(EXIT_FAILURE); | |
3851 | case 'V': | |
3852 | fprintf(stdout, "%s\n", VERSION); | |
3853 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3854 | case 'S': |
3855 | opt_sig_parent = 1; | |
3856 | break; | |
d6f42150 | 3857 | case 'E': |
3bd1e081 | 3858 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3859 | break; |
3860 | case 'C': | |
3bd1e081 MD |
3861 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3862 | break; | |
3863 | case 'F': | |
7753dea8 | 3864 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3865 | break; |
3866 | case 'D': | |
7753dea8 MD |
3867 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3868 | break; | |
3869 | case 'H': | |
3870 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3871 | break; | |
3872 | case 'G': | |
3873 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3874 | break; |
4fba7219 DG |
3875 | case 'N': |
3876 | opt_no_kernel = 1; | |
3877 | break; | |
75462a81 | 3878 | case 'q': |
97e19046 | 3879 | lttng_opt_quiet = 1; |
75462a81 | 3880 | break; |
3f9947db | 3881 | case 'v': |
53086306 | 3882 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3883 | lttng_opt_verbose += 1; |
3f9947db | 3884 | break; |
31f73cc9 | 3885 | case 'Z': |
3bd1e081 | 3886 | opt_verbose_consumer += 1; |
31f73cc9 | 3887 | break; |
fb09408a | 3888 | case 'u': |
fc7a59ce | 3889 | consumerd32_bin= optarg; |
ebaeda94 MD |
3890 | break; |
3891 | case 'U': | |
3892 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3893 | break; |
3894 | case 't': | |
fc7a59ce | 3895 | consumerd64_bin = optarg; |
ebaeda94 MD |
3896 | break; |
3897 | case 'T': | |
3898 | consumerd64_libdir = optarg; | |
fb09408a | 3899 | break; |
35f90c40 DG |
3900 | case 'p': |
3901 | opt_pidfile = optarg; | |
3902 | break; | |
fac6795d DG |
3903 | default: |
3904 | /* Unknown option or other error. | |
3905 | * Error is printed by getopt, just return */ | |
3906 | return -1; | |
3907 | } | |
3908 | } | |
3909 | ||
3910 | return 0; | |
3911 | } | |
3912 | ||
3913 | /* | |
d063d709 | 3914 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3915 | * apps_sock - The communication socket for all UST apps. |
3916 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3917 | */ |
cf3af59e | 3918 | static int init_daemon_socket(void) |
fac6795d DG |
3919 | { |
3920 | int ret = 0; | |
3921 | mode_t old_umask; | |
3922 | ||
3923 | old_umask = umask(0); | |
3924 | ||
3925 | /* Create client tool unix socket */ | |
d6f42150 DG |
3926 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3927 | if (client_sock < 0) { | |
3928 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3929 | ret = -1; |
3930 | goto end; | |
3931 | } | |
3932 | ||
b662582b DG |
3933 | /* Set the cloexec flag */ |
3934 | ret = utils_set_fd_cloexec(client_sock); | |
3935 | if (ret < 0) { | |
3936 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3937 | "Continuing but note that the consumer daemon will have a " | |
3938 | "reference to this socket on exec()", client_sock); | |
3939 | } | |
3940 | ||
fac6795d DG |
3941 | /* File permission MUST be 660 */ |
3942 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3943 | if (ret < 0) { | |
d6f42150 | 3944 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3945 | PERROR("chmod"); |
fac6795d DG |
3946 | goto end; |
3947 | } | |
3948 | ||
3949 | /* Create the application unix socket */ | |
d6f42150 DG |
3950 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3951 | if (apps_sock < 0) { | |
3952 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3953 | ret = -1; |
3954 | goto end; | |
3955 | } | |
3956 | ||
b662582b DG |
3957 | /* Set the cloexec flag */ |
3958 | ret = utils_set_fd_cloexec(apps_sock); | |
3959 | if (ret < 0) { | |
3960 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3961 | "Continuing but note that the consumer daemon will have a " | |
3962 | "reference to this socket on exec()", apps_sock); | |
3963 | } | |
3964 | ||
d6f42150 | 3965 | /* File permission MUST be 666 */ |
54d01ffb DG |
3966 | ret = chmod(apps_unix_sock_path, |
3967 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3968 | if (ret < 0) { |
d6f42150 | 3969 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3970 | PERROR("chmod"); |
fac6795d DG |
3971 | goto end; |
3972 | } | |
3973 | ||
b662582b DG |
3974 | DBG3("Session daemon client socket %d and application socket %d created", |
3975 | client_sock, apps_sock); | |
3976 | ||
fac6795d DG |
3977 | end: |
3978 | umask(old_umask); | |
3979 | return ret; | |
3980 | } | |
3981 | ||
3982 | /* | |
54d01ffb DG |
3983 | * Check if the global socket is available, and if a daemon is answering at the |
3984 | * other side. If yes, error is returned. | |
fac6795d | 3985 | */ |
cf3af59e | 3986 | static int check_existing_daemon(void) |
fac6795d | 3987 | { |
7d8234d9 | 3988 | /* Is there anybody out there ? */ |
099e26bd | 3989 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3990 | return -EEXIST; |
099e26bd | 3991 | } |
b09c7c76 DG |
3992 | |
3993 | return 0; | |
fac6795d DG |
3994 | } |
3995 | ||
fac6795d | 3996 | /* |
d063d709 | 3997 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3998 | * |
d063d709 | 3999 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4000 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4001 | */ |
be040666 | 4002 | static int set_permissions(char *rundir) |
fac6795d DG |
4003 | { |
4004 | int ret; | |
996b65c8 | 4005 | gid_t gid; |
fac6795d | 4006 | |
6775595e DG |
4007 | ret = allowed_group(); |
4008 | if (ret < 0) { | |
be040666 DG |
4009 | WARN("No tracing group detected"); |
4010 | ret = 0; | |
fac6795d DG |
4011 | goto end; |
4012 | } | |
4013 | ||
6775595e DG |
4014 | gid = ret; |
4015 | ||
d6f42150 | 4016 | /* Set lttng run dir */ |
be040666 | 4017 | ret = chown(rundir, 0, gid); |
d6f42150 | 4018 | if (ret < 0) { |
be040666 | 4019 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4020 | PERROR("chown"); |
d6f42150 DG |
4021 | } |
4022 | ||
d1613cf5 | 4023 | /* Ensure tracing group can search the run dir */ |
61076f74 | 4024 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
4025 | if (ret < 0) { |
4026 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4027 | PERROR("chmod"); |
d1613cf5 JN |
4028 | } |
4029 | ||
d6f42150 | 4030 | /* lttng client socket path */ |
996b65c8 | 4031 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4032 | if (ret < 0) { |
d6f42150 | 4033 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4034 | PERROR("chown"); |
d6f42150 DG |
4035 | } |
4036 | ||
3bd1e081 MD |
4037 | /* kconsumer error socket path */ |
4038 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 4039 | if (ret < 0) { |
3bd1e081 | 4040 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4041 | PERROR("chown"); |
3bd1e081 MD |
4042 | } |
4043 | ||
7753dea8 MD |
4044 | /* 64-bit ustconsumer error socket path */ |
4045 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
4046 | if (ret < 0) { | |
4047 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4048 | PERROR("chown"); |
7753dea8 MD |
4049 | } |
4050 | ||
4051 | /* 32-bit ustconsumer compat32 error socket path */ | |
4052 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 4053 | if (ret < 0) { |
7753dea8 | 4054 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4055 | PERROR("chown"); |
fac6795d DG |
4056 | } |
4057 | ||
d6f42150 | 4058 | DBG("All permissions are set"); |
e07ae692 | 4059 | |
fac6795d DG |
4060 | end: |
4061 | return ret; | |
4062 | } | |
4063 | ||
d6f42150 | 4064 | /* |
d063d709 | 4065 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4066 | */ |
67e40797 | 4067 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4068 | { |
4069 | int ret; | |
4070 | ||
67e40797 DG |
4071 | DBG3("Creating LTTng run directory: %s", rundir); |
4072 | ||
d1613cf5 | 4073 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4074 | if (ret < 0) { |
b1f11e69 | 4075 | if (errno != EEXIST) { |
67e40797 | 4076 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4077 | goto error; |
4078 | } else { | |
4079 | ret = 0; | |
4080 | } | |
d6f42150 DG |
4081 | } |
4082 | ||
4083 | error: | |
4084 | return ret; | |
4085 | } | |
4086 | ||
4087 | /* | |
d063d709 DG |
4088 | * Setup sockets and directory needed by the kconsumerd communication with the |
4089 | * session daemon. | |
d6f42150 | 4090 | */ |
67e40797 DG |
4091 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4092 | const char *rundir) | |
d6f42150 DG |
4093 | { |
4094 | int ret; | |
67e40797 | 4095 | char path[PATH_MAX]; |
d6f42150 | 4096 | |
67e40797 | 4097 | switch (consumer_data->type) { |
7753dea8 | 4098 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4099 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4100 | break; |
4101 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4102 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4103 | break; |
4104 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4105 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4106 | break; |
4107 | default: | |
4108 | ERR("Consumer type unknown"); | |
4109 | ret = -EINVAL; | |
4110 | goto error; | |
d6f42150 DG |
4111 | } |
4112 | ||
67e40797 DG |
4113 | DBG2("Creating consumer directory: %s", path); |
4114 | ||
d1613cf5 | 4115 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 4116 | if (ret < 0) { |
6beb2242 | 4117 | if (errno != EEXIST) { |
f11e84c2 | 4118 | PERROR("mkdir"); |
3bd1e081 | 4119 | ERR("Failed to create %s", path); |
6beb2242 DG |
4120 | goto error; |
4121 | } | |
f11e84c2 | 4122 | ret = -1; |
d6f42150 DG |
4123 | } |
4124 | ||
4125 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4126 | consumer_data->err_sock = |
4127 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4128 | if (consumer_data->err_sock < 0) { | |
4129 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4130 | ret = -1; |
4131 | goto error; | |
4132 | } | |
4133 | ||
4134 | /* File permission MUST be 660 */ | |
3bd1e081 | 4135 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4136 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4137 | if (ret < 0) { |
3bd1e081 | 4138 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4139 | PERROR("chmod"); |
d6f42150 DG |
4140 | goto error; |
4141 | } | |
4142 | ||
4143 | error: | |
4144 | return ret; | |
4145 | } | |
4146 | ||
fac6795d | 4147 | /* |
d063d709 | 4148 | * Signal handler for the daemon |
cf3af59e | 4149 | * |
54d01ffb DG |
4150 | * Simply stop all worker threads, leaving main() return gracefully after |
4151 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4152 | */ |
4153 | static void sighandler(int sig) | |
4154 | { | |
4155 | switch (sig) { | |
cf3af59e | 4156 | case SIGPIPE: |
af87c45a | 4157 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4158 | return; |
4159 | case SIGINT: | |
af87c45a | 4160 | DBG("SIGINT caught"); |
cf3af59e MD |
4161 | stop_threads(); |
4162 | break; | |
4163 | case SIGTERM: | |
af87c45a | 4164 | DBG("SIGTERM caught"); |
cf3af59e MD |
4165 | stop_threads(); |
4166 | break; | |
4167 | default: | |
4168 | break; | |
fac6795d | 4169 | } |
fac6795d DG |
4170 | } |
4171 | ||
4172 | /* | |
d063d709 | 4173 | * Setup signal handler for : |
1d4b027a | 4174 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4175 | */ |
1d4b027a | 4176 | static int set_signal_handler(void) |
fac6795d | 4177 | { |
1d4b027a DG |
4178 | int ret = 0; |
4179 | struct sigaction sa; | |
4180 | sigset_t sigset; | |
fac6795d | 4181 | |
1d4b027a | 4182 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4183 | PERROR("sigemptyset"); |
1d4b027a DG |
4184 | return ret; |
4185 | } | |
d6f42150 | 4186 | |
1d4b027a DG |
4187 | sa.sa_handler = sighandler; |
4188 | sa.sa_mask = sigset; | |
4189 | sa.sa_flags = 0; | |
4190 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4191 | PERROR("sigaction"); |
1d4b027a | 4192 | return ret; |
d6f42150 DG |
4193 | } |
4194 | ||
1d4b027a | 4195 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4196 | PERROR("sigaction"); |
1d4b027a | 4197 | return ret; |
d6f42150 | 4198 | } |
aaf26714 | 4199 | |
1d4b027a | 4200 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4201 | PERROR("sigaction"); |
1d4b027a | 4202 | return ret; |
8c0faa1d DG |
4203 | } |
4204 | ||
1d4b027a DG |
4205 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4206 | ||
4207 | return ret; | |
fac6795d DG |
4208 | } |
4209 | ||
f3ed775e | 4210 | /* |
d063d709 DG |
4211 | * Set open files limit to unlimited. This daemon can open a large number of |
4212 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4213 | */ |
4214 | static void set_ulimit(void) | |
4215 | { | |
4216 | int ret; | |
4217 | struct rlimit lim; | |
4218 | ||
a88df331 | 4219 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4220 | lim.rlim_cur = 65535; |
4221 | lim.rlim_max = 65535; | |
4222 | ||
4223 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4224 | if (ret < 0) { | |
76d7553f | 4225 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4226 | } |
4227 | } | |
4228 | ||
35f90c40 DG |
4229 | /* |
4230 | * Write pidfile using the rundir and opt_pidfile. | |
4231 | */ | |
4232 | static void write_pidfile(void) | |
4233 | { | |
4234 | int ret; | |
4235 | char pidfile_path[PATH_MAX]; | |
4236 | ||
4237 | assert(rundir); | |
4238 | ||
4239 | if (opt_pidfile) { | |
4240 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4241 | } else { | |
4242 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4243 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4244 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4245 | if (ret < 0) { | |
4246 | PERROR("snprintf pidfile path"); | |
4247 | goto error; | |
4248 | } | |
4249 | } | |
4250 | ||
4251 | /* | |
4252 | * Create pid file in rundir. Return value is of no importance. The | |
4253 | * execution will continue even though we are not able to write the file. | |
4254 | */ | |
4255 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4256 | ||
4257 | error: | |
4258 | return; | |
4259 | } | |
4260 | ||
fac6795d DG |
4261 | /* |
4262 | * main | |
4263 | */ | |
4264 | int main(int argc, char **argv) | |
4265 | { | |
fac6795d DG |
4266 | int ret = 0; |
4267 | void *status; | |
ae9e45b3 | 4268 | const char *home_path, *env_app_timeout; |
fac6795d | 4269 | |
335a95b7 MD |
4270 | init_kernel_workarounds(); |
4271 | ||
f6a9efaa DG |
4272 | rcu_register_thread(); |
4273 | ||
7753dea8 | 4274 | setup_consumerd_path(); |
fb09408a | 4275 | |
12744796 DG |
4276 | page_size = sysconf(_SC_PAGESIZE); |
4277 | if (page_size < 0) { | |
4278 | PERROR("sysconf _SC_PAGESIZE"); | |
4279 | page_size = LONG_MAX; | |
4280 | WARN("Fallback page size to %ld", page_size); | |
4281 | } | |
4282 | ||
fac6795d DG |
4283 | /* Parse arguments */ |
4284 | progname = argv[0]; | |
c617c0c6 | 4285 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 4286 | goto error; |
fac6795d DG |
4287 | } |
4288 | ||
4289 | /* Daemonize */ | |
4290 | if (opt_daemon) { | |
ceed52b5 MD |
4291 | int i; |
4292 | ||
4293 | /* | |
4294 | * fork | |
4295 | * child: setsid, close FD 0, 1, 2, chdir / | |
4296 | * parent: exit (if fork is successful) | |
4297 | */ | |
53094c05 DG |
4298 | ret = daemon(0, 0); |
4299 | if (ret < 0) { | |
76d7553f | 4300 | PERROR("daemon"); |
cf3af59e | 4301 | goto error; |
53094c05 | 4302 | } |
ceed52b5 MD |
4303 | /* |
4304 | * We are in the child. Make sure all other file | |
4305 | * descriptors are closed, in case we are called with | |
4306 | * more opened file descriptors than the standard ones. | |
4307 | */ | |
4308 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4309 | (void) close(i); | |
4310 | } | |
4311 | } | |
4312 | ||
76f3e2db DG |
4313 | /* Valgrind env. variable setup. */ |
4314 | if (getenv(DEFAULT_CONSUMER_DEBUG_VALGRIND_ENV)) { | |
4315 | consumer_debug_valgrind = 1; | |
4316 | /* Valgrind does not support clone(). */ | |
4317 | setenv("LTTNG_DEBUG_NOCLONE", "1", 1); | |
4318 | } | |
4319 | ||
ceed52b5 MD |
4320 | /* Create thread quit pipe */ |
4321 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4322 | goto error; | |
fac6795d DG |
4323 | } |
4324 | ||
4325 | /* Check if daemon is UID = 0 */ | |
4326 | is_root = !getuid(); | |
4327 | ||
fac6795d | 4328 | if (is_root) { |
990570ed | 4329 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4330 | |
4331 | /* Create global run dir with root access */ | |
4332 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4333 | if (ret < 0) { |
cf3af59e | 4334 | goto error; |
d6f42150 DG |
4335 | } |
4336 | ||
fac6795d | 4337 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4338 | snprintf(apps_unix_sock_path, PATH_MAX, |
4339 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4340 | } |
4341 | ||
4342 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4343 | snprintf(client_unix_sock_path, PATH_MAX, |
4344 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4345 | } | |
0fdd1e2c DG |
4346 | |
4347 | /* Set global SHM for ust */ | |
4348 | if (strlen(wait_shm_path) == 0) { | |
4349 | snprintf(wait_shm_path, PATH_MAX, | |
4350 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4351 | } | |
67e40797 | 4352 | |
44a5e5eb DG |
4353 | if (strlen(health_unix_sock_path) == 0) { |
4354 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4355 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4356 | } | |
4357 | ||
67e40797 DG |
4358 | /* Setup kernel consumerd path */ |
4359 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4360 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4361 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4362 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4363 | |
4364 | DBG2("Kernel consumer err path: %s", | |
4365 | kconsumer_data.err_unix_sock_path); | |
4366 | DBG2("Kernel consumer cmd path: %s", | |
4367 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4368 | } else { |
feb0f3e5 | 4369 | home_path = utils_get_home_dir(); |
b082db07 | 4370 | if (home_path == NULL) { |
273ea72c DG |
4371 | /* TODO: Add --socket PATH option */ |
4372 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4373 | ret = -EPERM; |
4374 | goto error; | |
b082db07 DG |
4375 | } |
4376 | ||
67e40797 DG |
4377 | /* |
4378 | * Create rundir from home path. This will create something like | |
4379 | * $HOME/.lttng | |
4380 | */ | |
990570ed | 4381 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4382 | if (ret < 0) { |
4383 | ret = -ENOMEM; | |
4384 | goto error; | |
4385 | } | |
4386 | ||
4387 | ret = create_lttng_rundir(rundir); | |
4388 | if (ret < 0) { | |
4389 | goto error; | |
4390 | } | |
4391 | ||
fac6795d | 4392 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4393 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4394 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4395 | } |
4396 | ||
4397 | /* Set the cli tool unix socket path */ | |
4398 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4399 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4400 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4401 | } |
0fdd1e2c DG |
4402 | |
4403 | /* Set global SHM for ust */ | |
4404 | if (strlen(wait_shm_path) == 0) { | |
4405 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4406 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4407 | } |
44a5e5eb DG |
4408 | |
4409 | /* Set health check Unix path */ | |
4410 | if (strlen(health_unix_sock_path) == 0) { | |
4411 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4412 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4413 | } | |
fac6795d DG |
4414 | } |
4415 | ||
5c827ce0 DG |
4416 | /* Set consumer initial state */ |
4417 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4418 | ust_consumerd_state = CONSUMER_STOPPED; | |
4419 | ||
847177cd DG |
4420 | DBG("Client socket path %s", client_unix_sock_path); |
4421 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4422 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4423 | DBG("LTTng run directory path: %s", rundir); |
4424 | ||
4425 | /* 32 bits consumerd path setup */ | |
4426 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4427 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4428 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4429 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4430 | |
4431 | DBG2("UST consumer 32 bits err path: %s", | |
4432 | ustconsumer32_data.err_unix_sock_path); | |
4433 | DBG2("UST consumer 32 bits cmd path: %s", | |
4434 | ustconsumer32_data.cmd_unix_sock_path); | |
4435 | ||
4436 | /* 64 bits consumerd path setup */ | |
4437 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4438 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4439 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4440 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4441 | |
4442 | DBG2("UST consumer 64 bits err path: %s", | |
4443 | ustconsumer64_data.err_unix_sock_path); | |
4444 | DBG2("UST consumer 64 bits cmd path: %s", | |
4445 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4446 | |
273ea72c | 4447 | /* |
7d8234d9 | 4448 | * See if daemon already exist. |
fac6795d | 4449 | */ |
7d8234d9 | 4450 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4451 | ERR("Already running daemon.\n"); |
273ea72c | 4452 | /* |
cf3af59e MD |
4453 | * We do not goto exit because we must not cleanup() |
4454 | * because a daemon is already running. | |
ab118b20 | 4455 | */ |
cf3af59e | 4456 | goto error; |
a88df331 DG |
4457 | } |
4458 | ||
1427f9b2 DG |
4459 | /* |
4460 | * Init UST app hash table. Alloc hash table before this point since | |
4461 | * cleanup() can get called after that point. | |
4462 | */ | |
4463 | ust_app_ht_alloc(); | |
4464 | ||
54d01ffb | 4465 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4466 | |
4467 | /* | |
4468 | * These actions must be executed as root. We do that *after* setting up | |
4469 | * the sockets path because we MUST make the check for another daemon using | |
4470 | * those paths *before* trying to set the kernel consumer sockets and init | |
4471 | * kernel tracer. | |
4472 | */ | |
4473 | if (is_root) { | |
67e40797 | 4474 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4475 | if (ret < 0) { |
4476 | goto exit; | |
4477 | } | |
4478 | ||
a88df331 | 4479 | /* Setup kernel tracer */ |
4fba7219 DG |
4480 | if (!opt_no_kernel) { |
4481 | init_kernel_tracer(); | |
4482 | } | |
a88df331 DG |
4483 | |
4484 | /* Set ulimit for open files */ | |
4485 | set_ulimit(); | |
fac6795d | 4486 | } |
4063050c MD |
4487 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4488 | lttng_fd_init(); | |
fac6795d | 4489 | |
67e40797 DG |
4490 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4491 | if (ret < 0) { | |
4492 | goto exit; | |
4493 | } | |
4494 | ||
4495 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4496 | if (ret < 0) { | |
4497 | goto exit; | |
4498 | } | |
4499 | ||
cf3af59e MD |
4500 | if ((ret = set_signal_handler()) < 0) { |
4501 | goto exit; | |
fac6795d DG |
4502 | } |
4503 | ||
d6f42150 | 4504 | /* Setup the needed unix socket */ |
cf3af59e MD |
4505 | if ((ret = init_daemon_socket()) < 0) { |
4506 | goto exit; | |
fac6795d DG |
4507 | } |
4508 | ||
4509 | /* Set credentials to socket */ | |
be040666 | 4510 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4511 | goto exit; |
fac6795d DG |
4512 | } |
4513 | ||
5b8719f5 DG |
4514 | /* Get parent pid if -S, --sig-parent is specified. */ |
4515 | if (opt_sig_parent) { | |
4516 | ppid = getppid(); | |
4517 | } | |
4518 | ||
7a485870 | 4519 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4520 | if (is_root && !opt_no_kernel) { |
4521 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4522 | goto exit; | |
4523 | } | |
7a485870 DG |
4524 | } |
4525 | ||
0b2dc8df MD |
4526 | /* Setup the thread ht_cleanup communication pipe. */ |
4527 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
4528 | goto exit; | |
4529 | } | |
4530 | ||
099e26bd | 4531 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4532 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4533 | goto exit; |
4534 | } | |
4535 | ||
d0b96690 DG |
4536 | /* Setup the thread apps notify communication pipe. */ |
4537 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4538 | goto exit; | |
4539 | } | |
4540 | ||
7972aab2 DG |
4541 | /* Initialize global buffer per UID and PID registry. */ |
4542 | buffer_reg_init_uid_registry(); | |
4543 | buffer_reg_init_pid_registry(); | |
4544 | ||
099e26bd DG |
4545 | /* Init UST command queue. */ |
4546 | cds_wfq_init(&ust_cmd_queue.queue); | |
4547 | ||
273ea72c | 4548 | /* |
54d01ffb DG |
4549 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4550 | * statically declared in session.c | |
273ea72c | 4551 | */ |
54d01ffb | 4552 | session_list_ptr = session_get_list(); |
b5541356 | 4553 | |
5eb91c98 DG |
4554 | /* Set up max poll set size */ |
4555 | lttng_poll_set_max_size(); | |
4556 | ||
2f77fc4b | 4557 | cmd_init(); |
00e2e675 | 4558 | |
ae9e45b3 DG |
4559 | /* Check for the application socket timeout env variable. */ |
4560 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4561 | if (env_app_timeout) { | |
4562 | app_socket_timeout = atoi(env_app_timeout); | |
4563 | } else { | |
4564 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4565 | } | |
4566 | ||
35f90c40 DG |
4567 | write_pidfile(); |
4568 | ||
0b2dc8df MD |
4569 | /* Create thread to manage the client socket */ |
4570 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
4571 | thread_ht_cleanup, (void *) NULL); | |
4572 | if (ret != 0) { | |
4573 | PERROR("pthread_create ht_cleanup"); | |
4574 | goto exit_ht_cleanup; | |
4575 | } | |
4576 | ||
44a5e5eb DG |
4577 | /* Create thread to manage the client socket */ |
4578 | ret = pthread_create(&health_thread, NULL, | |
4579 | thread_manage_health, (void *) NULL); | |
4580 | if (ret != 0) { | |
4581 | PERROR("pthread_create health"); | |
4582 | goto exit_health; | |
4583 | } | |
4584 | ||
cf3af59e | 4585 | /* Create thread to manage the client socket */ |
099e26bd DG |
4586 | ret = pthread_create(&client_thread, NULL, |
4587 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4588 | if (ret != 0) { |
76d7553f | 4589 | PERROR("pthread_create clients"); |
cf3af59e MD |
4590 | goto exit_client; |
4591 | } | |
fac6795d | 4592 | |
099e26bd DG |
4593 | /* Create thread to dispatch registration */ |
4594 | ret = pthread_create(&dispatch_thread, NULL, | |
4595 | thread_dispatch_ust_registration, (void *) NULL); | |
4596 | if (ret != 0) { | |
76d7553f | 4597 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4598 | goto exit_dispatch; |
4599 | } | |
4600 | ||
4601 | /* Create thread to manage application registration. */ | |
4602 | ret = pthread_create(®_apps_thread, NULL, | |
4603 | thread_registration_apps, (void *) NULL); | |
4604 | if (ret != 0) { | |
76d7553f | 4605 | PERROR("pthread_create registration"); |
099e26bd DG |
4606 | goto exit_reg_apps; |
4607 | } | |
4608 | ||
cf3af59e | 4609 | /* Create thread to manage application socket */ |
54d01ffb DG |
4610 | ret = pthread_create(&apps_thread, NULL, |
4611 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4612 | if (ret != 0) { |
d0b96690 DG |
4613 | PERROR("pthread_create apps"); |
4614 | goto exit_apps; | |
4615 | } | |
4616 | ||
4617 | /* Create thread to manage application notify socket */ | |
4618 | ret = pthread_create(&apps_notify_thread, NULL, | |
4619 | ust_thread_manage_notify, (void *) NULL); | |
4620 | if (ret != 0) { | |
76d7553f | 4621 | PERROR("pthread_create apps"); |
cf3af59e MD |
4622 | goto exit_apps; |
4623 | } | |
fac6795d | 4624 | |
6620da75 DG |
4625 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4626 | if (is_root && !opt_no_kernel) { | |
4627 | /* Create kernel thread to manage kernel event */ | |
4628 | ret = pthread_create(&kernel_thread, NULL, | |
4629 | thread_manage_kernel, (void *) NULL); | |
4630 | if (ret != 0) { | |
4631 | PERROR("pthread_create kernel"); | |
4632 | goto exit_kernel; | |
4633 | } | |
7a485870 | 4634 | |
6620da75 DG |
4635 | ret = pthread_join(kernel_thread, &status); |
4636 | if (ret != 0) { | |
4637 | PERROR("pthread_join"); | |
4638 | goto error; /* join error, exit without cleanup */ | |
4639 | } | |
fac6795d DG |
4640 | } |
4641 | ||
cf3af59e MD |
4642 | exit_kernel: |
4643 | ret = pthread_join(apps_thread, &status); | |
4644 | if (ret != 0) { | |
76d7553f | 4645 | PERROR("pthread_join"); |
cf3af59e MD |
4646 | goto error; /* join error, exit without cleanup */ |
4647 | } | |
fac6795d | 4648 | |
cf3af59e | 4649 | exit_apps: |
099e26bd DG |
4650 | ret = pthread_join(reg_apps_thread, &status); |
4651 | if (ret != 0) { | |
76d7553f | 4652 | PERROR("pthread_join"); |
099e26bd DG |
4653 | goto error; /* join error, exit without cleanup */ |
4654 | } | |
4655 | ||
4656 | exit_reg_apps: | |
4657 | ret = pthread_join(dispatch_thread, &status); | |
4658 | if (ret != 0) { | |
76d7553f | 4659 | PERROR("pthread_join"); |
099e26bd DG |
4660 | goto error; /* join error, exit without cleanup */ |
4661 | } | |
4662 | ||
4663 | exit_dispatch: | |
cf3af59e MD |
4664 | ret = pthread_join(client_thread, &status); |
4665 | if (ret != 0) { | |
76d7553f | 4666 | PERROR("pthread_join"); |
cf3af59e MD |
4667 | goto error; /* join error, exit without cleanup */ |
4668 | } | |
4669 | ||
3bd1e081 | 4670 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4671 | if (ret != 0) { |
76d7553f | 4672 | PERROR("join_consumer"); |
cf3af59e MD |
4673 | goto error; /* join error, exit without cleanup */ |
4674 | } | |
a88df331 | 4675 | |
06f525de DG |
4676 | ret = join_consumer_thread(&ustconsumer32_data); |
4677 | if (ret != 0) { | |
4678 | PERROR("join_consumer ust32"); | |
4679 | goto error; /* join error, exit without cleanup */ | |
4680 | } | |
4681 | ||
4682 | ret = join_consumer_thread(&ustconsumer64_data); | |
4683 | if (ret != 0) { | |
4684 | PERROR("join_consumer ust64"); | |
4685 | goto error; /* join error, exit without cleanup */ | |
4686 | } | |
4687 | ||
cf3af59e | 4688 | exit_client: |
06f525de DG |
4689 | ret = pthread_join(health_thread, &status); |
4690 | if (ret != 0) { | |
4691 | PERROR("pthread_join health thread"); | |
4692 | goto error; /* join error, exit without cleanup */ | |
4693 | } | |
4694 | ||
44a5e5eb | 4695 | exit_health: |
0b2dc8df MD |
4696 | ret = pthread_join(ht_cleanup_thread, &status); |
4697 | if (ret != 0) { | |
4698 | PERROR("pthread_join ht cleanup thread"); | |
4699 | goto error; /* join error, exit without cleanup */ | |
4700 | } | |
4701 | exit_ht_cleanup: | |
a88df331 | 4702 | exit: |
cf3af59e MD |
4703 | /* |
4704 | * cleanup() is called when no other thread is running. | |
4705 | */ | |
f6a9efaa | 4706 | rcu_thread_online(); |
cf3af59e | 4707 | cleanup(); |
f6a9efaa DG |
4708 | rcu_thread_offline(); |
4709 | rcu_unregister_thread(); | |
67e40797 | 4710 | if (!ret) { |
cf3af59e | 4711 | exit(EXIT_SUCCESS); |
67e40797 | 4712 | } |
cf3af59e | 4713 | error: |
5e16da05 | 4714 | exit(EXIT_FAILURE); |
fac6795d | 4715 | } |