Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
91d76f53 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
0fdd1e2c | 28 | #include <sys/mman.h> |
b73401da | 29 | #include <sys/mount.h> |
1e307fab | 30 | #include <sys/resource.h> |
fac6795d DG |
31 | #include <sys/socket.h> |
32 | #include <sys/stat.h> | |
33 | #include <sys/types.h> | |
0fdd1e2c | 34 | #include <sys/wait.h> |
5c827ce0 | 35 | #include <urcu/uatomic.h> |
fac6795d | 36 | #include <unistd.h> |
3bd1e081 | 37 | #include <config.h> |
fac6795d | 38 | |
990570ed | 39 | #include <common/common.h> |
0ba98ebc | 40 | #include <common/compat/poll.h> |
d27c42b8 | 41 | #include <common/compat/socket.h> |
db758600 DG |
42 | #include <common/defaults.h> |
43 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 44 | #include <common/futex.h> |
00e2e675 | 45 | #include <common/relayd/relayd.h> |
81b86775 | 46 | #include <common/utils.h> |
fac6795d | 47 | |
10a8a223 | 48 | #include "lttng-sessiond.h" |
54d01ffb | 49 | #include "channel.h" |
2f77fc4b | 50 | #include "cmd.h" |
00e2e675 | 51 | #include "consumer.h" |
099e26bd | 52 | #include "context.h" |
54d01ffb | 53 | #include "event.h" |
4771f025 | 54 | #include "kernel.h" |
f1e16794 | 55 | #include "kernel-consumer.h" |
096102bd | 56 | #include "modprobe.h" |
0fdd1e2c | 57 | #include "shm.h" |
1e307fab | 58 | #include "ust-ctl.h" |
00e2e675 | 59 | #include "ust-consumer.h" |
8e68d1c8 | 60 | #include "utils.h" |
4063050c | 61 | #include "fd-limit.h" |
44a5e5eb | 62 | #include "health.h" |
8ac94142 | 63 | #include "testpoint.h" |
fac6795d | 64 | |
ebaeda94 MD |
65 | #define CONSUMERD_FILE "lttng-consumerd" |
66 | ||
75462a81 | 67 | /* Const values */ |
686204ab | 68 | const char default_home_dir[] = DEFAULT_HOME_DIR; |
bbccc3d2 | 69 | const char default_tracing_group[] = DEFAULT_TRACING_GROUP; |
686204ab MD |
70 | const char default_ust_sock_dir[] = DEFAULT_UST_SOCK_DIR; |
71 | const char default_global_apps_pipe[] = DEFAULT_GLOBAL_APPS_PIPE; | |
72 | ||
fac6795d DG |
73 | const char *progname; |
74 | const char *opt_tracing_group; | |
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, | |
173af62f DG |
93 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
94 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
95 | .cond = PTHREAD_COND_INITIALIZER, |
96 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 97 | }; |
7753dea8 MD |
98 | static struct consumer_data ustconsumer64_data = { |
99 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
100 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
101 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
102 | .err_sock = -1, |
103 | .cmd_sock = -1, | |
173af62f DG |
104 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
105 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
106 | .cond = PTHREAD_COND_INITIALIZER, |
107 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
108 | }; |
109 | static struct consumer_data ustconsumer32_data = { | |
110 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
111 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
112 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
113 | .err_sock = -1, |
114 | .cmd_sock = -1, | |
173af62f DG |
115 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
116 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
117 | .cond = PTHREAD_COND_INITIALIZER, |
118 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
119 | }; |
120 | ||
26c9d55e | 121 | /* Shared between threads */ |
099e26bd | 122 | static int dispatch_thread_exit; |
fac6795d | 123 | |
54d01ffb DG |
124 | /* Global application Unix socket path */ |
125 | static char apps_unix_sock_path[PATH_MAX]; | |
126 | /* Global client Unix socket path */ | |
127 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
128 | /* global wait shm path for UST */ |
129 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
130 | /* Global health check unix path */ |
131 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 132 | |
1d4b027a | 133 | /* Sockets and FDs */ |
a4b35e07 MD |
134 | static int client_sock = -1; |
135 | static int apps_sock = -1; | |
2f77fc4b | 136 | int kernel_tracer_fd = -1; |
76d7553f | 137 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 138 | |
273ea72c DG |
139 | /* |
140 | * Quit pipe for all threads. This permits a single cancellation point | |
141 | * for all threads when receiving an event on the pipe. | |
142 | */ | |
76d7553f | 143 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 144 | |
099e26bd DG |
145 | /* |
146 | * This pipe is used to inform the thread managing application communication | |
147 | * that a command is queued and ready to be processed. | |
148 | */ | |
76d7553f | 149 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 150 | |
1d4b027a | 151 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 152 | static pthread_t apps_thread; |
099e26bd | 153 | static pthread_t reg_apps_thread; |
1d4b027a | 154 | static pthread_t client_thread; |
7a485870 | 155 | static pthread_t kernel_thread; |
099e26bd | 156 | static pthread_t dispatch_thread; |
44a5e5eb | 157 | static pthread_t health_thread; |
5eb91c98 | 158 | |
099e26bd DG |
159 | /* |
160 | * UST registration command queue. This queue is tied with a futex and uses a N | |
161 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
162 | * | |
163 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
164 | * this queue and the wait/wake scheme. | |
165 | */ | |
166 | static struct ust_cmd_queue ust_cmd_queue; | |
167 | ||
b5541356 DG |
168 | /* |
169 | * Pointer initialized before thread creation. | |
170 | * | |
171 | * This points to the tracing session list containing the session count and a | |
172 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
173 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 174 | * |
d063d709 | 175 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 176 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
177 | */ |
178 | static struct ltt_session_list *session_list_ptr; | |
179 | ||
7753dea8 MD |
180 | int ust_consumerd64_fd = -1; |
181 | int ust_consumerd32_fd = -1; | |
182 | ||
fb6f1fa2 YB |
183 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
184 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
185 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
186 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 187 | |
2f77fc4b DG |
188 | static const char *module_proc_lttng = "/proc/lttng"; |
189 | ||
5c827ce0 DG |
190 | /* |
191 | * Consumer daemon state which is changed when spawning it, killing it or in | |
192 | * case of a fatal error. | |
193 | */ | |
194 | enum consumerd_state { | |
195 | CONSUMER_STARTED = 1, | |
196 | CONSUMER_STOPPED = 2, | |
197 | CONSUMER_ERROR = 3, | |
198 | }; | |
199 | ||
200 | /* | |
201 | * This consumer daemon state is used to validate if a client command will be | |
202 | * able to reach the consumer. If not, the client is informed. For instance, | |
203 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
204 | * error to the client. | |
205 | * | |
206 | * The following example shows a possible race condition of this scheme: | |
207 | * | |
208 | * consumer thread error happens | |
209 | * client cmd arrives | |
210 | * client cmd checks state -> still OK | |
211 | * consumer thread exit, sets error | |
212 | * client cmd try to talk to consumer | |
213 | * ... | |
214 | * | |
215 | * However, since the consumer is a different daemon, we have no way of making | |
216 | * sure the command will reach it safely even with this state flag. This is why | |
217 | * we consider that up to the state validation during command processing, the | |
218 | * command is safe. After that, we can not guarantee the correctness of the | |
219 | * client request vis-a-vis the consumer. | |
220 | */ | |
221 | static enum consumerd_state ust_consumerd_state; | |
222 | static enum consumerd_state kernel_consumerd_state; | |
223 | ||
ae9e45b3 DG |
224 | /* |
225 | * Socket timeout for receiving and sending in seconds. | |
226 | */ | |
227 | static int app_socket_timeout; | |
228 | ||
fb09408a | 229 | static |
7753dea8 | 230 | void setup_consumerd_path(void) |
fb09408a | 231 | { |
fc7a59ce | 232 | const char *bin, *libdir; |
fb09408a | 233 | |
7753dea8 MD |
234 | /* |
235 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
236 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
237 | * has not been defined. | |
7753dea8 | 238 | */ |
ebaeda94 | 239 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
240 | if (!consumerd32_bin[0]) { |
241 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
242 | } |
243 | if (!consumerd32_libdir[0]) { | |
244 | consumerd32_libdir = INSTALL_LIB_PATH; | |
245 | } | |
246 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
247 | if (!consumerd64_bin[0]) { |
248 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 249 | } |
ebaeda94 MD |
250 | if (!consumerd64_libdir[0]) { |
251 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
252 | } |
253 | #else | |
254 | #error "Unknown bitness" | |
255 | #endif | |
256 | ||
fb09408a MD |
257 | /* |
258 | * runtime env. var. overrides the build default. | |
259 | */ | |
fc7a59ce AM |
260 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
261 | if (bin) { | |
262 | consumerd32_bin = bin; | |
7753dea8 | 263 | } |
fc7a59ce AM |
264 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
265 | if (bin) { | |
266 | consumerd64_bin = bin; | |
ebaeda94 | 267 | } |
72f579ee | 268 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
269 | if (libdir) { |
270 | consumerd32_libdir = libdir; | |
271 | } | |
72f579ee | 272 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
273 | if (libdir) { |
274 | consumerd64_libdir = libdir; | |
fb09408a MD |
275 | } |
276 | } | |
277 | ||
5eb91c98 DG |
278 | /* |
279 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
280 | */ | |
281 | static int create_thread_poll_set(struct lttng_poll_event *events, | |
282 | unsigned int size) | |
283 | { | |
284 | int ret; | |
285 | ||
286 | if (events == NULL || size == 0) { | |
287 | ret = -1; | |
288 | goto error; | |
289 | } | |
290 | ||
291 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
292 | if (ret < 0) { | |
293 | goto error; | |
294 | } | |
295 | ||
296 | /* Add quit pipe */ | |
297 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN); | |
298 | if (ret < 0) { | |
299 | goto error; | |
300 | } | |
301 | ||
302 | return 0; | |
303 | ||
304 | error: | |
305 | return ret; | |
306 | } | |
307 | ||
308 | /* | |
309 | * Check if the thread quit pipe was triggered. | |
310 | * | |
311 | * Return 1 if it was triggered else 0; | |
312 | */ | |
313 | static int check_thread_quit_pipe(int fd, uint32_t events) | |
314 | { | |
315 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
316 | return 1; | |
317 | } | |
318 | ||
319 | return 0; | |
320 | } | |
321 | ||
0fdd1e2c DG |
322 | /* |
323 | * Return group ID of the tracing group or -1 if not found. | |
324 | */ | |
996b65c8 MD |
325 | static gid_t allowed_group(void) |
326 | { | |
327 | struct group *grp; | |
328 | ||
274e143b MD |
329 | if (opt_tracing_group) { |
330 | grp = getgrnam(opt_tracing_group); | |
331 | } else { | |
332 | grp = getgrnam(default_tracing_group); | |
333 | } | |
996b65c8 MD |
334 | if (!grp) { |
335 | return -1; | |
336 | } else { | |
337 | return grp->gr_gid; | |
338 | } | |
339 | } | |
340 | ||
273ea72c | 341 | /* |
5eb91c98 | 342 | * Init thread quit pipe. |
273ea72c DG |
343 | * |
344 | * Return -1 on error or 0 if all pipes are created. | |
345 | */ | |
346 | static int init_thread_quit_pipe(void) | |
347 | { | |
730389d9 | 348 | int ret, i; |
273ea72c | 349 | |
730389d9 | 350 | ret = pipe(thread_quit_pipe); |
273ea72c | 351 | if (ret < 0) { |
730389d9 | 352 | PERROR("thread quit pipe"); |
273ea72c DG |
353 | goto error; |
354 | } | |
355 | ||
730389d9 DG |
356 | for (i = 0; i < 2; i++) { |
357 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
358 | if (ret < 0) { | |
359 | PERROR("fcntl"); | |
360 | goto error; | |
361 | } | |
362 | } | |
363 | ||
273ea72c DG |
364 | error: |
365 | return ret; | |
366 | } | |
367 | ||
099e26bd DG |
368 | /* |
369 | * Stop all threads by closing the thread quit pipe. | |
370 | */ | |
cf3af59e MD |
371 | static void stop_threads(void) |
372 | { | |
5eb91c98 DG |
373 | int ret; |
374 | ||
cf3af59e MD |
375 | /* Stopping all threads */ |
376 | DBG("Terminating all threads"); | |
54d01ffb | 377 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
378 | if (ret < 0) { |
379 | ERR("write error on thread quit pipe"); | |
380 | } | |
381 | ||
099e26bd | 382 | /* Dispatch thread */ |
26c9d55e | 383 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 384 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
385 | } |
386 | ||
fac6795d | 387 | /* |
d063d709 | 388 | * Cleanup the daemon |
fac6795d | 389 | */ |
cf3af59e | 390 | static void cleanup(void) |
fac6795d | 391 | { |
ef599319 | 392 | int ret; |
6620da75 | 393 | char *cmd = NULL; |
af9737e9 | 394 | struct ltt_session *sess, *stmp; |
fac6795d | 395 | |
1d4b027a | 396 | DBG("Cleaning up"); |
e07ae692 | 397 | |
2f77fc4b DG |
398 | /* First thing first, stop all threads */ |
399 | utils_close_pipe(thread_quit_pipe); | |
400 | ||
67e40797 DG |
401 | DBG("Removing %s directory", rundir); |
402 | ret = asprintf(&cmd, "rm -rf %s", rundir); | |
403 | if (ret < 0) { | |
404 | ERR("asprintf failed. Something is really wrong!"); | |
405 | } | |
5461b305 | 406 | |
67e40797 DG |
407 | /* Remove lttng run directory */ |
408 | ret = system(cmd); | |
409 | if (ret < 0) { | |
410 | ERR("Unable to clean %s", rundir); | |
1d4b027a | 411 | } |
67e40797 | 412 | free(cmd); |
bd69add2 | 413 | free(rundir); |
5461b305 | 414 | |
99bab54f | 415 | DBG("Cleaning up all sessions"); |
fac6795d | 416 | |
b5541356 | 417 | /* Destroy session list mutex */ |
273ea72c DG |
418 | if (session_list_ptr != NULL) { |
419 | pthread_mutex_destroy(&session_list_ptr->lock); | |
420 | ||
421 | /* Cleanup ALL session */ | |
54d01ffb DG |
422 | cds_list_for_each_entry_safe(sess, stmp, |
423 | &session_list_ptr->head, list) { | |
2f77fc4b | 424 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
425 | } |
426 | } | |
427 | ||
099e26bd | 428 | DBG("Closing all UST sockets"); |
56fff090 | 429 | ust_app_clean_list(); |
099e26bd | 430 | |
4fba7219 DG |
431 | if (is_root && !opt_no_kernel) { |
432 | DBG2("Closing kernel fd"); | |
a4b35e07 | 433 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
434 | ret = close(kernel_tracer_fd); |
435 | if (ret) { | |
436 | PERROR("close"); | |
437 | } | |
a4b35e07 | 438 | } |
2f50c8a3 | 439 | DBG("Unloading kernel modules"); |
096102bd | 440 | modprobe_remove_lttng_all(); |
2f50c8a3 | 441 | } |
2f77fc4b | 442 | |
421cb601 | 443 | /* <fun> */ |
f56a39af | 444 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
445 | "Matthew, BEET driven development works!%c[%dm", |
446 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
447 | /* </fun> */ | |
fac6795d DG |
448 | } |
449 | ||
e065084a | 450 | /* |
d063d709 | 451 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 452 | * |
d063d709 | 453 | * Return lttcomm error code. |
e065084a DG |
454 | */ |
455 | static int send_unix_sock(int sock, void *buf, size_t len) | |
456 | { | |
457 | /* Check valid length */ | |
c617c0c6 | 458 | if (len == 0) { |
e065084a DG |
459 | return -1; |
460 | } | |
461 | ||
462 | return lttcomm_send_unix_sock(sock, buf, len); | |
463 | } | |
464 | ||
5461b305 | 465 | /* |
d063d709 | 466 | * Free memory of a command context structure. |
5461b305 | 467 | */ |
a2fb29a5 | 468 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 469 | { |
a2fb29a5 DG |
470 | DBG("Clean command context structure"); |
471 | if (*cmd_ctx) { | |
472 | if ((*cmd_ctx)->llm) { | |
473 | free((*cmd_ctx)->llm); | |
5461b305 | 474 | } |
a2fb29a5 DG |
475 | if ((*cmd_ctx)->lsm) { |
476 | free((*cmd_ctx)->lsm); | |
5461b305 | 477 | } |
a2fb29a5 DG |
478 | free(*cmd_ctx); |
479 | *cmd_ctx = NULL; | |
5461b305 DG |
480 | } |
481 | } | |
482 | ||
fac6795d | 483 | /* |
0fdd1e2c | 484 | * Notify UST applications using the shm mmap futex. |
fac6795d | 485 | */ |
0fdd1e2c | 486 | static int notify_ust_apps(int active) |
fac6795d | 487 | { |
0fdd1e2c | 488 | char *wait_shm_mmap; |
fac6795d | 489 | |
0fdd1e2c | 490 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 491 | |
0fdd1e2c DG |
492 | /* See shm.c for this call implying mmap, shm and futex calls */ |
493 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
494 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
495 | goto error; |
496 | } | |
497 | ||
0fdd1e2c DG |
498 | /* Wake waiting process */ |
499 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
500 | ||
501 | /* Apps notified successfully */ | |
502 | return 0; | |
fac6795d DG |
503 | |
504 | error: | |
0fdd1e2c | 505 | return -1; |
fac6795d DG |
506 | } |
507 | ||
e065084a | 508 | /* |
d063d709 DG |
509 | * Setup the outgoing data buffer for the response (llm) by allocating the |
510 | * right amount of memory and copying the original information from the lsm | |
511 | * structure. | |
ca95a216 | 512 | * |
d063d709 | 513 | * Return total size of the buffer pointed by buf. |
ca95a216 | 514 | */ |
5461b305 | 515 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 516 | { |
f3ed775e | 517 | int ret, buf_size; |
ca95a216 | 518 | |
f3ed775e | 519 | buf_size = size; |
5461b305 | 520 | |
ba7f0ae5 | 521 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 522 | if (cmd_ctx->llm == NULL) { |
76d7553f | 523 | PERROR("zmalloc"); |
5461b305 | 524 | ret = -ENOMEM; |
ca95a216 DG |
525 | goto error; |
526 | } | |
527 | ||
5461b305 DG |
528 | /* Copy common data */ |
529 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 530 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 531 | |
5461b305 DG |
532 | cmd_ctx->llm->data_size = size; |
533 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
534 | ||
ca95a216 DG |
535 | return buf_size; |
536 | ||
537 | error: | |
538 | return ret; | |
539 | } | |
540 | ||
7a485870 | 541 | /* |
5eb91c98 | 542 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 543 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 544 | */ |
5eb91c98 | 545 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 546 | { |
5eb91c98 | 547 | int ret; |
7a485870 DG |
548 | struct ltt_session *session; |
549 | struct ltt_kernel_channel *channel; | |
550 | ||
5eb91c98 | 551 | DBG("Updating kernel poll set"); |
7a485870 | 552 | |
54d01ffb | 553 | session_lock_list(); |
b5541356 | 554 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 555 | session_lock(session); |
7a485870 | 556 | if (session->kernel_session == NULL) { |
54d01ffb | 557 | session_unlock(session); |
7a485870 DG |
558 | continue; |
559 | } | |
7a485870 | 560 | |
54d01ffb DG |
561 | cds_list_for_each_entry(channel, |
562 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
563 | /* Add channel fd to the kernel poll set */ |
564 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
565 | if (ret < 0) { | |
54d01ffb | 566 | session_unlock(session); |
5eb91c98 DG |
567 | goto error; |
568 | } | |
569 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 570 | } |
54d01ffb | 571 | session_unlock(session); |
7a485870 | 572 | } |
54d01ffb | 573 | session_unlock_list(); |
7a485870 | 574 | |
5eb91c98 | 575 | return 0; |
7a485870 DG |
576 | |
577 | error: | |
54d01ffb | 578 | session_unlock_list(); |
7a485870 DG |
579 | return -1; |
580 | } | |
581 | ||
582 | /* | |
54d01ffb | 583 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 584 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 585 | * |
d063d709 | 586 | * Useful for CPU hotplug feature. |
7a485870 | 587 | */ |
2bdd86d4 | 588 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
589 | { |
590 | int ret = 0; | |
591 | struct ltt_session *session; | |
173af62f | 592 | struct ltt_kernel_session *ksess; |
7a485870 DG |
593 | struct ltt_kernel_channel *channel; |
594 | ||
595 | DBG("Updating kernel streams for channel fd %d", fd); | |
596 | ||
54d01ffb | 597 | session_lock_list(); |
b5541356 | 598 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 599 | session_lock(session); |
7a485870 | 600 | if (session->kernel_session == NULL) { |
54d01ffb | 601 | session_unlock(session); |
7a485870 DG |
602 | continue; |
603 | } | |
173af62f | 604 | ksess = session->kernel_session; |
d9800920 | 605 | |
173af62f | 606 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
607 | if (channel->fd == fd) { |
608 | DBG("Channel found, updating kernel streams"); | |
609 | ret = kernel_open_channel_stream(channel); | |
610 | if (ret < 0) { | |
b3c750d2 | 611 | goto error; |
7a485870 | 612 | } |
d9800920 | 613 | |
7a485870 | 614 | /* |
5eb91c98 DG |
615 | * Have we already sent fds to the consumer? If yes, it means |
616 | * that tracing is started so it is safe to send our updated | |
617 | * stream fds. | |
7a485870 | 618 | */ |
173af62f DG |
619 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
620 | struct lttng_ht_iter iter; | |
621 | struct consumer_socket *socket; | |
622 | ||
2219ef35 | 623 | rcu_read_lock(); |
173af62f DG |
624 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
625 | &iter.iter, socket, node.node) { | |
626 | /* Code flow error */ | |
627 | assert(socket->fd >= 0); | |
628 | ||
629 | pthread_mutex_lock(socket->lock); | |
f50f23d9 | 630 | ret = kernel_consumer_send_channel_stream(socket, |
173af62f DG |
631 | channel, ksess); |
632 | pthread_mutex_unlock(socket->lock); | |
633 | if (ret < 0) { | |
2219ef35 | 634 | rcu_read_unlock(); |
173af62f DG |
635 | goto error; |
636 | } | |
7a485870 | 637 | } |
2219ef35 | 638 | rcu_read_unlock(); |
7a485870 | 639 | } |
b3c750d2 | 640 | goto error; |
7a485870 DG |
641 | } |
642 | } | |
54d01ffb | 643 | session_unlock(session); |
7a485870 | 644 | } |
54d01ffb | 645 | session_unlock_list(); |
b3c750d2 | 646 | return ret; |
7a485870 | 647 | |
b3c750d2 | 648 | error: |
54d01ffb DG |
649 | session_unlock(session); |
650 | session_unlock_list(); | |
7a485870 DG |
651 | return ret; |
652 | } | |
653 | ||
487cf67c DG |
654 | /* |
655 | * For each tracing session, update newly registered apps. | |
656 | */ | |
657 | static void update_ust_app(int app_sock) | |
658 | { | |
659 | struct ltt_session *sess, *stmp; | |
660 | ||
4ee14516 DG |
661 | session_lock_list(); |
662 | ||
487cf67c DG |
663 | /* For all tracing session(s) */ |
664 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 665 | session_lock(sess); |
421cb601 DG |
666 | if (sess->ust_session) { |
667 | ust_app_global_update(sess->ust_session, app_sock); | |
668 | } | |
4ee14516 | 669 | session_unlock(sess); |
487cf67c | 670 | } |
4ee14516 DG |
671 | |
672 | session_unlock_list(); | |
487cf67c DG |
673 | } |
674 | ||
7a485870 | 675 | /* |
d063d709 | 676 | * This thread manage event coming from the kernel. |
7a485870 | 677 | * |
d063d709 DG |
678 | * Features supported in this thread: |
679 | * -) CPU Hotplug | |
7a485870 DG |
680 | */ |
681 | static void *thread_manage_kernel(void *data) | |
682 | { | |
139ac872 | 683 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 684 | uint32_t revents, nb_fd; |
7a485870 | 685 | char tmp; |
5eb91c98 | 686 | struct lttng_poll_event events; |
7a485870 | 687 | |
6993eeb3 | 688 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 689 | |
769b7d7e DG |
690 | health_register(HEALTH_TYPE_KERNEL); |
691 | ||
d5d63bf1 DG |
692 | /* |
693 | * This first step of the while is to clean this structure which could free | |
694 | * non NULL pointers so zero it before the loop. | |
695 | */ | |
696 | memset(&events, 0, sizeof(events)); | |
697 | ||
6993eeb3 CB |
698 | if (testpoint(thread_manage_kernel)) { |
699 | goto error_testpoint; | |
700 | } | |
8ac94142 | 701 | |
227e824a | 702 | health_code_update(); |
44a5e5eb | 703 | |
6993eeb3 | 704 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 705 | goto error_testpoint; |
6993eeb3 CB |
706 | } |
707 | ||
7a485870 | 708 | while (1) { |
227e824a | 709 | health_code_update(); |
44a5e5eb | 710 | |
7a485870 | 711 | if (update_poll_flag == 1) { |
d21b0d71 DG |
712 | /* Clean events object. We are about to populate it again. */ |
713 | lttng_poll_clean(&events); | |
714 | ||
715 | ret = create_thread_poll_set(&events, 2); | |
716 | if (ret < 0) { | |
717 | goto error_poll_create; | |
718 | } | |
719 | ||
720 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
721 | if (ret < 0) { | |
722 | goto error; | |
723 | } | |
5f822d0a | 724 | |
d21b0d71 | 725 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
726 | ret = update_kernel_poll(&events); |
727 | if (ret < 0) { | |
7a485870 DG |
728 | goto error; |
729 | } | |
730 | update_poll_flag = 0; | |
731 | } | |
732 | ||
d21b0d71 | 733 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
734 | |
735 | /* Poll infinite value of time */ | |
88f2b785 | 736 | restart: |
227e824a | 737 | health_poll_update(); |
5eb91c98 | 738 | ret = lttng_poll_wait(&events, -1); |
227e824a | 739 | health_poll_update(); |
7a485870 | 740 | if (ret < 0) { |
88f2b785 MD |
741 | /* |
742 | * Restart interrupted system call. | |
743 | */ | |
744 | if (errno == EINTR) { | |
745 | goto restart; | |
746 | } | |
7a485870 DG |
747 | goto error; |
748 | } else if (ret == 0) { | |
749 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
750 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
751 | "This should not have happened! Continuing..."); | |
7a485870 DG |
752 | continue; |
753 | } | |
754 | ||
0d9c5d77 DG |
755 | nb_fd = ret; |
756 | ||
5eb91c98 DG |
757 | for (i = 0; i < nb_fd; i++) { |
758 | /* Fetch once the poll data */ | |
759 | revents = LTTNG_POLL_GETEV(&events, i); | |
760 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 761 | |
227e824a | 762 | health_code_update(); |
44a5e5eb | 763 | |
5eb91c98 DG |
764 | /* Thread quit pipe has been closed. Killing thread. */ |
765 | ret = check_thread_quit_pipe(pollfd, revents); | |
766 | if (ret) { | |
139ac872 MD |
767 | err = 0; |
768 | goto exit; | |
5eb91c98 | 769 | } |
7a485870 | 770 | |
5eb91c98 DG |
771 | /* Check for data on kernel pipe */ |
772 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
f921c78f DG |
773 | do { |
774 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
775 | } while (ret < 0 && errno == EINTR); | |
776 | /* | |
777 | * Ret value is useless here, if this pipe gets any actions an | |
778 | * update is required anyway. | |
779 | */ | |
5eb91c98 DG |
780 | update_poll_flag = 1; |
781 | continue; | |
782 | } else { | |
783 | /* | |
784 | * New CPU detected by the kernel. Adding kernel stream to | |
785 | * kernel session and updating the kernel consumer | |
786 | */ | |
787 | if (revents & LPOLLIN) { | |
2bdd86d4 | 788 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
789 | if (ret < 0) { |
790 | continue; | |
791 | } | |
792 | break; | |
793 | /* | |
794 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
795 | * and unregister kernel stream at this point. | |
796 | */ | |
7a485870 | 797 | } |
7a485870 DG |
798 | } |
799 | } | |
800 | } | |
801 | ||
139ac872 | 802 | exit: |
7a485870 | 803 | error: |
5eb91c98 | 804 | lttng_poll_clean(&events); |
76d7553f | 805 | error_poll_create: |
6993eeb3 | 806 | error_testpoint: |
6620da75 DG |
807 | utils_close_pipe(kernel_poll_pipe); |
808 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 809 | if (err) { |
227e824a | 810 | health_error(); |
139ac872 | 811 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
812 | WARN("Kernel thread died unexpectedly. " |
813 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 814 | } |
769b7d7e | 815 | health_unregister(); |
76d7553f | 816 | DBG("Kernel thread dying"); |
7a485870 DG |
817 | return NULL; |
818 | } | |
819 | ||
a23ec3a7 DG |
820 | /* |
821 | * Signal pthread condition of the consumer data that the thread. | |
822 | */ | |
823 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
824 | { | |
825 | pthread_mutex_lock(&data->cond_mutex); | |
826 | ||
827 | /* | |
828 | * The state is set before signaling. It can be any value, it's the waiter | |
829 | * job to correctly interpret this condition variable associated to the | |
830 | * consumer pthread_cond. | |
831 | * | |
832 | * A value of 0 means that the corresponding thread of the consumer data | |
833 | * was not started. 1 indicates that the thread has started and is ready | |
834 | * for action. A negative value means that there was an error during the | |
835 | * thread bootstrap. | |
836 | */ | |
837 | data->consumer_thread_is_ready = state; | |
838 | (void) pthread_cond_signal(&data->cond); | |
839 | ||
840 | pthread_mutex_unlock(&data->cond_mutex); | |
841 | } | |
842 | ||
1d4b027a | 843 | /* |
3bd1e081 | 844 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 845 | */ |
3bd1e081 | 846 | static void *thread_manage_consumer(void *data) |
1d4b027a | 847 | { |
139ac872 | 848 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 849 | uint32_t revents, nb_fd; |
1d4b027a | 850 | enum lttcomm_return_code code; |
5eb91c98 | 851 | struct lttng_poll_event events; |
3bd1e081 | 852 | struct consumer_data *consumer_data = data; |
1d4b027a | 853 | |
3bd1e081 | 854 | DBG("[thread] Manage consumer started"); |
1d4b027a | 855 | |
769b7d7e DG |
856 | health_register(HEALTH_TYPE_CONSUMER); |
857 | ||
a6eab824 | 858 | health_code_update(); |
9449cc75 | 859 | |
5eb91c98 DG |
860 | /* |
861 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
862 | * Nothing more will be added to this poll set. | |
863 | */ | |
864 | ret = create_thread_poll_set(&events, 2); | |
865 | if (ret < 0) { | |
76d7553f | 866 | goto error_poll; |
5eb91c98 | 867 | } |
273ea72c | 868 | |
edb8b045 DG |
869 | /* |
870 | * The error socket here is already in a listening state which was done | |
871 | * just before spawning this thread to avoid a race between the consumer | |
872 | * daemon exec trying to connect and the listen() call. | |
873 | */ | |
3bd1e081 | 874 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
875 | if (ret < 0) { |
876 | goto error; | |
877 | } | |
878 | ||
227e824a | 879 | health_code_update(); |
44a5e5eb | 880 | |
273ea72c | 881 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 882 | restart: |
227e824a | 883 | health_poll_update(); |
8ac94142 | 884 | |
6993eeb3 CB |
885 | if (testpoint(thread_manage_consumer)) { |
886 | goto error; | |
887 | } | |
8ac94142 | 888 | |
5eb91c98 | 889 | ret = lttng_poll_wait(&events, -1); |
227e824a | 890 | health_poll_update(); |
273ea72c | 891 | if (ret < 0) { |
88f2b785 MD |
892 | /* |
893 | * Restart interrupted system call. | |
894 | */ | |
895 | if (errno == EINTR) { | |
896 | goto restart; | |
897 | } | |
273ea72c DG |
898 | goto error; |
899 | } | |
900 | ||
0d9c5d77 DG |
901 | nb_fd = ret; |
902 | ||
5eb91c98 DG |
903 | for (i = 0; i < nb_fd; i++) { |
904 | /* Fetch once the poll data */ | |
905 | revents = LTTNG_POLL_GETEV(&events, i); | |
906 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
907 | ||
227e824a | 908 | health_code_update(); |
44a5e5eb | 909 | |
5eb91c98 DG |
910 | /* Thread quit pipe has been closed. Killing thread. */ |
911 | ret = check_thread_quit_pipe(pollfd, revents); | |
912 | if (ret) { | |
139ac872 MD |
913 | err = 0; |
914 | goto exit; | |
5eb91c98 DG |
915 | } |
916 | ||
917 | /* Event on the registration socket */ | |
3bd1e081 | 918 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 919 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 920 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
921 | goto error; |
922 | } | |
923 | } | |
273ea72c DG |
924 | } |
925 | ||
3bd1e081 | 926 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
927 | if (sock < 0) { |
928 | goto error; | |
929 | } | |
930 | ||
b662582b DG |
931 | /* |
932 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
933 | * show must go on. | |
934 | */ | |
935 | (void) utils_set_fd_cloexec(sock); | |
936 | ||
227e824a | 937 | health_code_update(); |
44a5e5eb | 938 | |
3bd1e081 | 939 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 940 | |
712ea556 | 941 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
942 | ret = lttcomm_recv_unix_sock(sock, &code, |
943 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
944 | if (ret <= 0) { |
945 | goto error; | |
946 | } | |
947 | ||
227e824a | 948 | health_code_update(); |
44a5e5eb | 949 | |
f73fabfd | 950 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 MD |
951 | consumer_data->cmd_sock = |
952 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
953 | if (consumer_data->cmd_sock < 0) { | |
a23ec3a7 DG |
954 | /* On error, signal condition and quit. */ |
955 | signal_consumer_condition(consumer_data, -1); | |
48842b30 | 956 | PERROR("consumer connect"); |
1d4b027a DG |
957 | goto error; |
958 | } | |
a23ec3a7 DG |
959 | signal_consumer_condition(consumer_data, 1); |
960 | DBG("Consumer command socket ready"); | |
1d4b027a | 961 | } else { |
3bd1e081 | 962 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
963 | lttcomm_get_readable_code(-code)); |
964 | goto error; | |
965 | } | |
966 | ||
54d01ffb | 967 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 968 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 969 | if (ret < 0) { |
72079cae DG |
970 | goto error; |
971 | } | |
972 | ||
5eb91c98 DG |
973 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
974 | if (ret < 0) { | |
72079cae | 975 | goto error; |
5eb91c98 DG |
976 | } |
977 | ||
227e824a | 978 | health_code_update(); |
44a5e5eb | 979 | |
5eb91c98 | 980 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 981 | restart_poll: |
227e824a | 982 | health_poll_update(); |
5eb91c98 | 983 | ret = lttng_poll_wait(&events, -1); |
227e824a | 984 | health_poll_update(); |
5eb91c98 | 985 | if (ret < 0) { |
88f2b785 MD |
986 | /* |
987 | * Restart interrupted system call. | |
988 | */ | |
989 | if (errno == EINTR) { | |
990 | goto restart_poll; | |
991 | } | |
72079cae DG |
992 | goto error; |
993 | } | |
994 | ||
0d9c5d77 DG |
995 | nb_fd = ret; |
996 | ||
5eb91c98 DG |
997 | for (i = 0; i < nb_fd; i++) { |
998 | /* Fetch once the poll data */ | |
999 | revents = LTTNG_POLL_GETEV(&events, i); | |
1000 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1001 | ||
227e824a | 1002 | health_code_update(); |
44a5e5eb | 1003 | |
5eb91c98 DG |
1004 | /* Thread quit pipe has been closed. Killing thread. */ |
1005 | ret = check_thread_quit_pipe(pollfd, revents); | |
1006 | if (ret) { | |
139ac872 MD |
1007 | err = 0; |
1008 | goto exit; | |
5eb91c98 DG |
1009 | } |
1010 | ||
1011 | /* Event on the kconsumerd socket */ | |
1012 | if (pollfd == sock) { | |
1013 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1014 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1015 | goto error; |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
227e824a | 1020 | health_code_update(); |
44a5e5eb | 1021 | |
712ea556 | 1022 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1023 | ret = lttcomm_recv_unix_sock(sock, &code, |
1024 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1025 | if (ret <= 0) { |
3bd1e081 | 1026 | ERR("consumer closed the command socket"); |
712ea556 | 1027 | goto error; |
6f61d021 | 1028 | } |
1d4b027a | 1029 | |
3bd1e081 | 1030 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1031 | |
139ac872 | 1032 | exit: |
1d4b027a | 1033 | error: |
5c827ce0 DG |
1034 | /* Immediately set the consumerd state to stopped */ |
1035 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1036 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1037 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1038 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1039 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1040 | } else { | |
1041 | /* Code flow error... */ | |
1042 | assert(0); | |
1043 | } | |
1044 | ||
76d7553f MD |
1045 | if (consumer_data->err_sock >= 0) { |
1046 | ret = close(consumer_data->err_sock); | |
1047 | if (ret) { | |
1048 | PERROR("close"); | |
1049 | } | |
1050 | } | |
1051 | if (consumer_data->cmd_sock >= 0) { | |
1052 | ret = close(consumer_data->cmd_sock); | |
1053 | if (ret) { | |
1054 | PERROR("close"); | |
1055 | } | |
1056 | } | |
1057 | if (sock >= 0) { | |
1058 | ret = close(sock); | |
1059 | if (ret) { | |
1060 | PERROR("close"); | |
1061 | } | |
1062 | } | |
273ea72c | 1063 | |
3bd1e081 MD |
1064 | unlink(consumer_data->err_unix_sock_path); |
1065 | unlink(consumer_data->cmd_unix_sock_path); | |
1066 | consumer_data->pid = 0; | |
1d4b027a | 1067 | |
5eb91c98 | 1068 | lttng_poll_clean(&events); |
76d7553f | 1069 | error_poll: |
139ac872 | 1070 | if (err) { |
227e824a | 1071 | health_error(); |
139ac872 MD |
1072 | ERR("Health error occurred in %s", __func__); |
1073 | } | |
769b7d7e | 1074 | health_unregister(); |
76d7553f | 1075 | DBG("consumer thread cleanup completed"); |
0177d773 | 1076 | |
5eb91c98 | 1077 | return NULL; |
099e26bd DG |
1078 | } |
1079 | ||
099e26bd DG |
1080 | /* |
1081 | * This thread manage application communication. | |
1d4b027a DG |
1082 | */ |
1083 | static void *thread_manage_apps(void *data) | |
099e26bd | 1084 | { |
139ac872 | 1085 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1086 | uint32_t revents, nb_fd; |
099e26bd | 1087 | struct ust_command ust_cmd; |
5eb91c98 | 1088 | struct lttng_poll_event events; |
099e26bd DG |
1089 | |
1090 | DBG("[thread] Manage application started"); | |
1091 | ||
f6a9efaa DG |
1092 | rcu_register_thread(); |
1093 | rcu_thread_online(); | |
1094 | ||
769b7d7e DG |
1095 | health_register(HEALTH_TYPE_APP_MANAGE); |
1096 | ||
6993eeb3 CB |
1097 | if (testpoint(thread_manage_apps)) { |
1098 | goto error_testpoint; | |
1099 | } | |
1100 | ||
227e824a | 1101 | health_code_update(); |
44a5e5eb | 1102 | |
5eb91c98 DG |
1103 | ret = create_thread_poll_set(&events, 2); |
1104 | if (ret < 0) { | |
76d7553f | 1105 | goto error_poll_create; |
5eb91c98 | 1106 | } |
099e26bd | 1107 | |
5eb91c98 DG |
1108 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1109 | if (ret < 0) { | |
1110 | goto error; | |
1111 | } | |
099e26bd | 1112 | |
6993eeb3 CB |
1113 | if (testpoint(thread_manage_apps_before_loop)) { |
1114 | goto error; | |
1115 | } | |
8ac94142 | 1116 | |
227e824a | 1117 | health_code_update(); |
44a5e5eb | 1118 | |
5eb91c98 | 1119 | while (1) { |
d21b0d71 | 1120 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1121 | |
1122 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1123 | restart: |
227e824a | 1124 | health_poll_update(); |
5eb91c98 | 1125 | ret = lttng_poll_wait(&events, -1); |
227e824a | 1126 | health_poll_update(); |
099e26bd | 1127 | if (ret < 0) { |
88f2b785 MD |
1128 | /* |
1129 | * Restart interrupted system call. | |
1130 | */ | |
1131 | if (errno == EINTR) { | |
1132 | goto restart; | |
1133 | } | |
099e26bd DG |
1134 | goto error; |
1135 | } | |
1136 | ||
0d9c5d77 DG |
1137 | nb_fd = ret; |
1138 | ||
5eb91c98 DG |
1139 | for (i = 0; i < nb_fd; i++) { |
1140 | /* Fetch once the poll data */ | |
1141 | revents = LTTNG_POLL_GETEV(&events, i); | |
1142 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1143 | ||
227e824a | 1144 | health_code_update(); |
44a5e5eb | 1145 | |
5eb91c98 DG |
1146 | /* Thread quit pipe has been closed. Killing thread. */ |
1147 | ret = check_thread_quit_pipe(pollfd, revents); | |
1148 | if (ret) { | |
139ac872 MD |
1149 | err = 0; |
1150 | goto exit; | |
5eb91c98 | 1151 | } |
099e26bd | 1152 | |
5eb91c98 DG |
1153 | /* Inspect the apps cmd pipe */ |
1154 | if (pollfd == apps_cmd_pipe[0]) { | |
1155 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1156 | ERR("Apps command pipe error"); | |
0177d773 | 1157 | goto error; |
5eb91c98 DG |
1158 | } else if (revents & LPOLLIN) { |
1159 | /* Empty pipe */ | |
f921c78f DG |
1160 | do { |
1161 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1162 | } while (ret < 0 && errno == EINTR); | |
5eb91c98 | 1163 | if (ret < 0 || ret < sizeof(ust_cmd)) { |
76d7553f | 1164 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1165 | goto error; |
1166 | } | |
099e26bd | 1167 | |
227e824a | 1168 | health_code_update(); |
44a5e5eb | 1169 | |
5eb91c98 | 1170 | /* Register applicaton to the session daemon */ |
56fff090 | 1171 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1172 | ust_cmd.sock); |
88ff5b7f | 1173 | if (ret == -ENOMEM) { |
5eb91c98 | 1174 | goto error; |
88ff5b7f MD |
1175 | } else if (ret < 0) { |
1176 | break; | |
5eb91c98 DG |
1177 | } |
1178 | ||
227e824a | 1179 | health_code_update(); |
44a5e5eb | 1180 | |
acc7b41b | 1181 | /* |
e0c7ec2b | 1182 | * Validate UST version compatibility. |
acc7b41b | 1183 | */ |
e0c7ec2b DG |
1184 | ret = ust_app_validate_version(ust_cmd.sock); |
1185 | if (ret >= 0) { | |
1186 | /* | |
1187 | * Add channel(s) and event(s) to newly registered apps | |
1188 | * from lttng global UST domain. | |
1189 | */ | |
1190 | update_ust_app(ust_cmd.sock); | |
1191 | } | |
acc7b41b | 1192 | |
227e824a | 1193 | health_code_update(); |
44a5e5eb | 1194 | |
f2ca2e25 | 1195 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1196 | if (ret < 0) { |
1197 | /* | |
1198 | * If the registration is not possible, we simply | |
1199 | * unregister the apps and continue | |
1200 | */ | |
56fff090 | 1201 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1202 | } else { |
1203 | /* | |
622c9ecf DG |
1204 | * We only monitor the error events of the socket. This |
1205 | * thread does not handle any incoming data from UST | |
1206 | * (POLLIN). | |
5eb91c98 | 1207 | */ |
622c9ecf DG |
1208 | ret = lttng_poll_add(&events, ust_cmd.sock, |
1209 | LPOLLERR & LPOLLHUP & LPOLLRDHUP); | |
5eb91c98 DG |
1210 | if (ret < 0) { |
1211 | goto error; | |
1212 | } | |
1213 | ||
ae9e45b3 DG |
1214 | /* Set socket timeout for both receiving and ending */ |
1215 | (void) lttcomm_setsockopt_rcv_timeout(ust_cmd.sock, | |
1216 | app_socket_timeout); | |
1217 | (void) lttcomm_setsockopt_snd_timeout(ust_cmd.sock, | |
1218 | app_socket_timeout); | |
1219 | ||
54d01ffb DG |
1220 | DBG("Apps with sock %d added to poll set", |
1221 | ust_cmd.sock); | |
5eb91c98 | 1222 | } |
487cf67c | 1223 | |
227e824a | 1224 | health_code_update(); |
44a5e5eb | 1225 | |
5eb91c98 | 1226 | break; |
0177d773 | 1227 | } |
5eb91c98 DG |
1228 | } else { |
1229 | /* | |
54d01ffb DG |
1230 | * At this point, we know that a registered application made |
1231 | * the event at poll_wait. | |
5eb91c98 DG |
1232 | */ |
1233 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1234 | /* Removing from the poll set */ | |
1235 | ret = lttng_poll_del(&events, pollfd); | |
1236 | if (ret < 0) { | |
1237 | goto error; | |
1238 | } | |
099e26bd | 1239 | |
b9d9b220 | 1240 | /* Socket closed on remote end. */ |
56fff090 | 1241 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1242 | break; |
1243 | } | |
099e26bd | 1244 | } |
44a5e5eb | 1245 | |
227e824a | 1246 | health_code_update(); |
099e26bd | 1247 | } |
099e26bd DG |
1248 | } |
1249 | ||
139ac872 | 1250 | exit: |
099e26bd | 1251 | error: |
5eb91c98 | 1252 | lttng_poll_clean(&events); |
76d7553f | 1253 | error_poll_create: |
6993eeb3 | 1254 | error_testpoint: |
6620da75 DG |
1255 | utils_close_pipe(apps_cmd_pipe); |
1256 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1257 | ||
1258 | /* | |
1259 | * We don't clean the UST app hash table here since already registered | |
1260 | * applications can still be controlled so let them be until the session | |
1261 | * daemon dies or the applications stop. | |
1262 | */ | |
1263 | ||
139ac872 | 1264 | if (err) { |
227e824a | 1265 | health_error(); |
139ac872 MD |
1266 | ERR("Health error occurred in %s", __func__); |
1267 | } | |
769b7d7e | 1268 | health_unregister(); |
76d7553f | 1269 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1270 | rcu_thread_offline(); |
1271 | rcu_unregister_thread(); | |
099e26bd DG |
1272 | return NULL; |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * Dispatch request from the registration threads to the application | |
1277 | * communication thread. | |
1278 | */ | |
1279 | static void *thread_dispatch_ust_registration(void *data) | |
1280 | { | |
1281 | int ret; | |
1282 | struct cds_wfq_node *node; | |
1283 | struct ust_command *ust_cmd = NULL; | |
1284 | ||
1285 | DBG("[thread] Dispatch UST command started"); | |
1286 | ||
26c9d55e | 1287 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1288 | /* Atomically prepare the queue futex */ |
1289 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1290 | ||
1291 | do { | |
1292 | /* Dequeue command for registration */ | |
1293 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1294 | if (node == NULL) { | |
00a17c97 | 1295 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1296 | /* Continue thread execution */ |
1297 | break; | |
1298 | } | |
1299 | ||
1300 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1301 | ||
2f50c8a3 DG |
1302 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1303 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1304 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1305 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1306 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1307 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1308 | /* |
1309 | * Inform apps thread of the new application registration. This | |
1310 | * call is blocking so we can be assured that the data will be read | |
1311 | * at some point in time or wait to the end of the world :) | |
1312 | */ | |
6620da75 | 1313 | if (apps_cmd_pipe[1] >= 0) { |
fbb3b395 DG |
1314 | do { |
1315 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1316 | sizeof(struct ust_command)); | |
1317 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1318 | if (ret < 0 || ret != sizeof(struct ust_command)) { |
6620da75 DG |
1319 | PERROR("write apps cmd pipe"); |
1320 | if (errno == EBADF) { | |
1321 | /* | |
1322 | * We can't inform the application thread to process | |
1323 | * registration. We will exit or else application | |
1324 | * registration will not occur and tracing will never | |
1325 | * start. | |
1326 | */ | |
1327 | goto error; | |
1328 | } | |
1329 | } | |
1330 | } else { | |
1331 | /* Application manager thread is not available. */ | |
1332 | ret = close(ust_cmd->sock); | |
1333 | if (ret < 0) { | |
1334 | PERROR("close ust_cmd sock"); | |
099e26bd DG |
1335 | } |
1336 | } | |
1337 | free(ust_cmd); | |
1338 | } while (node != NULL); | |
1339 | ||
1340 | /* Futex wait on queue. Blocking call on futex() */ | |
1341 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1342 | } | |
1343 | ||
1344 | error: | |
1345 | DBG("Dispatch thread dying"); | |
1346 | return NULL; | |
1347 | } | |
1348 | ||
1349 | /* | |
1350 | * This thread manage application registration. | |
1351 | */ | |
1352 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1353 | { |
139ac872 | 1354 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1355 | uint32_t revents, nb_fd; |
1356 | struct lttng_poll_event events; | |
099e26bd DG |
1357 | /* |
1358 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1359 | * freed in the manage apps thread. | |
1360 | */ | |
1361 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1362 | |
099e26bd | 1363 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1364 | |
769b7d7e DG |
1365 | health_register(HEALTH_TYPE_APP_REG); |
1366 | ||
6993eeb3 CB |
1367 | if (testpoint(thread_registration_apps)) { |
1368 | goto error_testpoint; | |
1369 | } | |
8ac94142 | 1370 | |
1d4b027a DG |
1371 | ret = lttcomm_listen_unix_sock(apps_sock); |
1372 | if (ret < 0) { | |
76d7553f | 1373 | goto error_listen; |
1d4b027a DG |
1374 | } |
1375 | ||
5eb91c98 DG |
1376 | /* |
1377 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1378 | * more will be added to this poll set. | |
1379 | */ | |
1380 | ret = create_thread_poll_set(&events, 2); | |
1381 | if (ret < 0) { | |
76d7553f | 1382 | goto error_create_poll; |
5eb91c98 | 1383 | } |
273ea72c | 1384 | |
5eb91c98 DG |
1385 | /* Add the application registration socket */ |
1386 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1387 | if (ret < 0) { | |
76d7553f | 1388 | goto error_poll_add; |
5eb91c98 | 1389 | } |
273ea72c | 1390 | |
1d4b027a | 1391 | /* Notify all applications to register */ |
0fdd1e2c DG |
1392 | ret = notify_ust_apps(1); |
1393 | if (ret < 0) { | |
1394 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1395 | "Execution continues but there might be problem for already\n" |
1396 | "running applications that wishes to register."); | |
0fdd1e2c | 1397 | } |
1d4b027a DG |
1398 | |
1399 | while (1) { | |
1400 | DBG("Accepting application registration"); | |
273ea72c DG |
1401 | |
1402 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1403 | restart: |
227e824a | 1404 | health_poll_update(); |
5eb91c98 | 1405 | ret = lttng_poll_wait(&events, -1); |
227e824a | 1406 | health_poll_update(); |
273ea72c | 1407 | if (ret < 0) { |
88f2b785 MD |
1408 | /* |
1409 | * Restart interrupted system call. | |
1410 | */ | |
1411 | if (errno == EINTR) { | |
1412 | goto restart; | |
1413 | } | |
273ea72c DG |
1414 | goto error; |
1415 | } | |
1416 | ||
0d9c5d77 DG |
1417 | nb_fd = ret; |
1418 | ||
5eb91c98 | 1419 | for (i = 0; i < nb_fd; i++) { |
227e824a | 1420 | health_code_update(); |
139ac872 | 1421 | |
5eb91c98 DG |
1422 | /* Fetch once the poll data */ |
1423 | revents = LTTNG_POLL_GETEV(&events, i); | |
1424 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1425 | |
5eb91c98 DG |
1426 | /* Thread quit pipe has been closed. Killing thread. */ |
1427 | ret = check_thread_quit_pipe(pollfd, revents); | |
1428 | if (ret) { | |
139ac872 MD |
1429 | err = 0; |
1430 | goto exit; | |
90014c57 | 1431 | } |
1d4b027a | 1432 | |
5eb91c98 DG |
1433 | /* Event on the registration socket */ |
1434 | if (pollfd == apps_sock) { | |
1435 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1436 | ERR("Register apps socket poll error"); | |
1437 | goto error; | |
1438 | } else if (revents & LPOLLIN) { | |
1439 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1440 | if (sock < 0) { | |
1441 | goto error; | |
1442 | } | |
099e26bd | 1443 | |
b662582b DG |
1444 | /* |
1445 | * Set the CLOEXEC flag. Return code is useless because | |
1446 | * either way, the show must go on. | |
1447 | */ | |
1448 | (void) utils_set_fd_cloexec(sock); | |
1449 | ||
5eb91c98 | 1450 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1451 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1452 | if (ust_cmd == NULL) { |
76d7553f | 1453 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1454 | goto error; |
1455 | } | |
1d4b027a | 1456 | |
5eb91c98 DG |
1457 | /* |
1458 | * Using message-based transmissions to ensure we don't | |
1459 | * have to deal with partially received messages. | |
1460 | */ | |
4063050c MD |
1461 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1462 | if (ret < 0) { | |
1463 | ERR("Exhausted file descriptors allowed for applications."); | |
1464 | free(ust_cmd); | |
1465 | ret = close(sock); | |
1466 | if (ret) { | |
1467 | PERROR("close"); | |
1468 | } | |
1469 | sock = -1; | |
1470 | continue; | |
1471 | } | |
227e824a | 1472 | health_code_update(); |
5eb91c98 DG |
1473 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1474 | sizeof(struct ust_register_msg)); | |
1475 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1476 | if (ret < 0) { | |
76d7553f | 1477 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1478 | } else { |
1479 | ERR("Wrong size received on apps register"); | |
1480 | } | |
1481 | free(ust_cmd); | |
76d7553f MD |
1482 | ret = close(sock); |
1483 | if (ret) { | |
1484 | PERROR("close"); | |
1485 | } | |
4063050c | 1486 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1487 | sock = -1; |
5eb91c98 DG |
1488 | continue; |
1489 | } | |
227e824a | 1490 | health_code_update(); |
099e26bd | 1491 | |
5eb91c98 | 1492 | ust_cmd->sock = sock; |
34a2494f | 1493 | sock = -1; |
099e26bd | 1494 | |
5eb91c98 DG |
1495 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1496 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1497 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1498 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1499 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1500 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1501 | |
5eb91c98 DG |
1502 | /* |
1503 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1504 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1505 | */ |
1506 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1507 | ||
1508 | /* | |
1509 | * Wake the registration queue futex. Implicit memory | |
1510 | * barrier with the exchange in cds_wfq_enqueue. | |
1511 | */ | |
1512 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1513 | } | |
1514 | } | |
90014c57 | 1515 | } |
1d4b027a DG |
1516 | } |
1517 | ||
139ac872 | 1518 | exit: |
1d4b027a | 1519 | error: |
139ac872 | 1520 | if (err) { |
227e824a | 1521 | health_error(); |
139ac872 MD |
1522 | ERR("Health error occurred in %s", __func__); |
1523 | } | |
139ac872 | 1524 | |
0fdd1e2c DG |
1525 | /* Notify that the registration thread is gone */ |
1526 | notify_ust_apps(0); | |
1527 | ||
a4b35e07 | 1528 | if (apps_sock >= 0) { |
76d7553f MD |
1529 | ret = close(apps_sock); |
1530 | if (ret) { | |
1531 | PERROR("close"); | |
1532 | } | |
a4b35e07 | 1533 | } |
46c3f085 | 1534 | if (sock >= 0) { |
76d7553f MD |
1535 | ret = close(sock); |
1536 | if (ret) { | |
1537 | PERROR("close"); | |
1538 | } | |
4063050c | 1539 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1540 | } |
273ea72c | 1541 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1542 | |
76d7553f | 1543 | error_poll_add: |
5eb91c98 | 1544 | lttng_poll_clean(&events); |
76d7553f MD |
1545 | error_listen: |
1546 | error_create_poll: | |
6993eeb3 | 1547 | error_testpoint: |
76d7553f | 1548 | DBG("UST Registration thread cleanup complete"); |
769b7d7e | 1549 | health_unregister(); |
5eb91c98 | 1550 | |
1d4b027a DG |
1551 | return NULL; |
1552 | } | |
1553 | ||
8c0faa1d | 1554 | /* |
3bd1e081 | 1555 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1556 | * exec or it will fails. |
8c0faa1d | 1557 | */ |
3bd1e081 | 1558 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1559 | { |
a23ec3a7 | 1560 | int ret, clock_ret; |
ee0b0061 DG |
1561 | struct timespec timeout; |
1562 | ||
a23ec3a7 DG |
1563 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1564 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1565 | |
a23ec3a7 DG |
1566 | /* Setup pthread condition */ |
1567 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1568 | if (ret != 0) { | |
1569 | errno = ret; | |
1570 | PERROR("pthread_condattr_init consumer data"); | |
1571 | goto error; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1576 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1577 | * for a more details and how we noticed it. | |
1578 | */ | |
1579 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1580 | if (ret != 0) { | |
1581 | errno = ret; | |
1582 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1583 | goto error; |
1584 | } | |
8c0faa1d | 1585 | |
a23ec3a7 DG |
1586 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1587 | if (ret != 0) { | |
1588 | errno = ret; | |
1589 | PERROR("pthread_cond_init consumer data"); | |
1590 | goto error; | |
1591 | } | |
1592 | ||
1593 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1594 | consumer_data); | |
8c0faa1d | 1595 | if (ret != 0) { |
3bd1e081 | 1596 | PERROR("pthread_create consumer"); |
ee0b0061 | 1597 | ret = -1; |
8c0faa1d DG |
1598 | goto error; |
1599 | } | |
1600 | ||
a23ec3a7 DG |
1601 | /* We are about to wait on a pthread condition */ |
1602 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1603 | ||
ee0b0061 | 1604 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1605 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1606 | /* | |
1607 | * Set the timeout for the condition timed wait even if the clock gettime | |
1608 | * call fails since we might loop on that call and we want to avoid to | |
1609 | * increment the timeout too many times. | |
1610 | */ | |
1611 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1612 | ||
1613 | /* | |
1614 | * The following loop COULD be skipped in some conditions so this is why we | |
1615 | * set ret to 0 in order to make sure at least one round of the loop is | |
1616 | * done. | |
1617 | */ | |
1618 | ret = 0; | |
1619 | ||
1620 | /* | |
1621 | * Loop until the condition is reached or when a timeout is reached. Note | |
1622 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1623 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1624 | * possible. This loop does not take any chances and works with both of | |
1625 | * them. | |
1626 | */ | |
1627 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1628 | if (clock_ret < 0) { | |
1629 | PERROR("clock_gettime spawn consumer"); | |
1630 | /* Infinite wait for the consumerd thread to be ready */ | |
1631 | ret = pthread_cond_wait(&consumer_data->cond, | |
1632 | &consumer_data->cond_mutex); | |
1633 | } else { | |
1634 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1635 | &consumer_data->cond_mutex, &timeout); | |
1636 | } | |
ee0b0061 | 1637 | } |
8c0faa1d | 1638 | |
a23ec3a7 DG |
1639 | /* Release the pthread condition */ |
1640 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1641 | ||
1642 | if (ret != 0) { | |
1643 | errno = ret; | |
1644 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1645 | /* |
1646 | * Call has timed out so we kill the kconsumerd_thread and return | |
1647 | * an error. | |
1648 | */ | |
a23ec3a7 DG |
1649 | ERR("Condition timed out. The consumer thread was never ready." |
1650 | " Killing it"); | |
3bd1e081 | 1651 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1652 | if (ret < 0) { |
3bd1e081 | 1653 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1654 | } |
1655 | } else { | |
a23ec3a7 | 1656 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1657 | } |
1658 | goto error; | |
1659 | } | |
1660 | ||
3bd1e081 MD |
1661 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1662 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1663 | ERR("Consumerd did not start"); |
3bd1e081 | 1664 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1665 | goto error; |
1666 | } | |
3bd1e081 | 1667 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1668 | |
8c0faa1d DG |
1669 | return 0; |
1670 | ||
1671 | error: | |
1672 | return ret; | |
1673 | } | |
1674 | ||
d9800920 | 1675 | /* |
3bd1e081 | 1676 | * Join consumer thread |
d9800920 | 1677 | */ |
3bd1e081 | 1678 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1679 | { |
1680 | void *status; | |
cf3af59e | 1681 | |
e8209f6b DG |
1682 | /* Consumer pid must be a real one. */ |
1683 | if (consumer_data->pid > 0) { | |
c617c0c6 | 1684 | int ret; |
3bd1e081 | 1685 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1686 | if (ret) { |
3bd1e081 | 1687 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1688 | return ret; |
1689 | } | |
3bd1e081 | 1690 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1691 | } else { |
1692 | return 0; | |
1693 | } | |
1694 | } | |
1695 | ||
8c0faa1d | 1696 | /* |
3bd1e081 | 1697 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1698 | * |
d063d709 | 1699 | * Return pid if successful else -1. |
8c0faa1d | 1700 | */ |
3bd1e081 | 1701 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1702 | { |
1703 | int ret; | |
1704 | pid_t pid; | |
94c55f17 | 1705 | const char *consumer_to_use; |
53086306 | 1706 | const char *verbosity; |
94c55f17 | 1707 | struct stat st; |
8c0faa1d | 1708 | |
3bd1e081 | 1709 | DBG("Spawning consumerd"); |
c49dc785 | 1710 | |
8c0faa1d DG |
1711 | pid = fork(); |
1712 | if (pid == 0) { | |
1713 | /* | |
3bd1e081 | 1714 | * Exec consumerd. |
8c0faa1d | 1715 | */ |
daee5345 | 1716 | if (opt_verbose_consumer) { |
53086306 DG |
1717 | verbosity = "--verbose"; |
1718 | } else { | |
1719 | verbosity = "--quiet"; | |
1720 | } | |
3bd1e081 MD |
1721 | switch (consumer_data->type) { |
1722 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1723 | /* |
c7704d57 DG |
1724 | * Find out which consumerd to execute. We will first try the |
1725 | * 64-bit path, then the sessiond's installation directory, and | |
1726 | * fallback on the 32-bit one, | |
94c55f17 | 1727 | */ |
63a799e8 AM |
1728 | DBG3("Looking for a kernel consumer at these locations:"); |
1729 | DBG3(" 1) %s", consumerd64_bin); | |
1730 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1731 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1732 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1733 | DBG3("Found location #1"); |
94c55f17 | 1734 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1735 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1736 | DBG3("Found location #2"); |
94c55f17 | 1737 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1738 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1739 | DBG3("Found location #3"); |
eb1e0bd4 | 1740 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1741 | } else { |
63a799e8 | 1742 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1743 | break; |
1744 | } | |
1745 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1746 | execl(consumer_to_use, | |
1747 | "lttng-consumerd", verbosity, "-k", | |
1748 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1749 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1750 | NULL); | |
3bd1e081 | 1751 | break; |
7753dea8 MD |
1752 | case LTTNG_CONSUMER64_UST: |
1753 | { | |
b1e0b6b6 | 1754 | char *tmpnew = NULL; |
8f4905da MD |
1755 | |
1756 | if (consumerd64_libdir[0] != '\0') { | |
1757 | char *tmp; | |
1758 | size_t tmplen; | |
1759 | ||
1760 | tmp = getenv("LD_LIBRARY_PATH"); | |
1761 | if (!tmp) { | |
1762 | tmp = ""; | |
1763 | } | |
1764 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1765 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1766 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1767 | if (!tmpnew) { | |
1768 | ret = -ENOMEM; | |
1769 | goto error; | |
1770 | } | |
1771 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1772 | strcat(tmpnew, consumerd64_libdir); | |
1773 | if (tmp[0] != '\0') { | |
1774 | strcat(tmpnew, ":"); | |
1775 | strcat(tmpnew, tmp); | |
1776 | } | |
1777 | ret = putenv(tmpnew); | |
1778 | if (ret) { | |
1779 | ret = -errno; | |
1780 | goto error; | |
1781 | } | |
1782 | } | |
94c55f17 | 1783 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1784 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1785 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1786 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1787 | NULL); | |
8f4905da MD |
1788 | if (consumerd64_libdir[0] != '\0') { |
1789 | free(tmpnew); | |
1790 | } | |
1791 | if (ret) { | |
1792 | goto error; | |
1793 | } | |
3bd1e081 | 1794 | break; |
7753dea8 MD |
1795 | } |
1796 | case LTTNG_CONSUMER32_UST: | |
1797 | { | |
937dde8e | 1798 | char *tmpnew = NULL; |
8f4905da MD |
1799 | |
1800 | if (consumerd32_libdir[0] != '\0') { | |
1801 | char *tmp; | |
1802 | size_t tmplen; | |
1803 | ||
1804 | tmp = getenv("LD_LIBRARY_PATH"); | |
1805 | if (!tmp) { | |
1806 | tmp = ""; | |
1807 | } | |
1808 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1809 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1810 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1811 | if (!tmpnew) { | |
1812 | ret = -ENOMEM; | |
1813 | goto error; | |
1814 | } | |
1815 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1816 | strcat(tmpnew, consumerd32_libdir); | |
1817 | if (tmp[0] != '\0') { | |
1818 | strcat(tmpnew, ":"); | |
1819 | strcat(tmpnew, tmp); | |
1820 | } | |
1821 | ret = putenv(tmpnew); | |
1822 | if (ret) { | |
1823 | ret = -errno; | |
1824 | goto error; | |
1825 | } | |
1826 | } | |
94c55f17 | 1827 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1828 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1829 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1830 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1831 | NULL); | |
8f4905da MD |
1832 | if (consumerd32_libdir[0] != '\0') { |
1833 | free(tmpnew); | |
1834 | } | |
1835 | if (ret) { | |
1836 | goto error; | |
1837 | } | |
7753dea8 MD |
1838 | break; |
1839 | } | |
3bd1e081 | 1840 | default: |
76d7553f | 1841 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1842 | exit(EXIT_FAILURE); |
1843 | } | |
8c0faa1d | 1844 | if (errno != 0) { |
76d7553f | 1845 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1846 | } |
1847 | exit(EXIT_FAILURE); | |
1848 | } else if (pid > 0) { | |
1849 | ret = pid; | |
8c0faa1d | 1850 | } else { |
76d7553f | 1851 | PERROR("start consumer fork"); |
8c0faa1d | 1852 | ret = -errno; |
8c0faa1d | 1853 | } |
8f4905da | 1854 | error: |
8c0faa1d DG |
1855 | return ret; |
1856 | } | |
1857 | ||
693bd40b | 1858 | /* |
3bd1e081 | 1859 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1860 | */ |
3bd1e081 | 1861 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 1862 | { |
c617c0c6 | 1863 | int ret; |
edb8b045 DG |
1864 | |
1865 | /* | |
1866 | * Set the listen() state on the socket since there is a possible race | |
1867 | * between the exec() of the consumer daemon and this call if place in the | |
1868 | * consumer thread. See bug #366 for more details. | |
1869 | */ | |
1870 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
1871 | if (ret < 0) { | |
1872 | goto error; | |
1873 | } | |
693bd40b | 1874 | |
3bd1e081 MD |
1875 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1876 | if (consumer_data->pid != 0) { | |
1877 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1878 | goto end; |
1879 | } | |
693bd40b | 1880 | |
3bd1e081 | 1881 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1882 | if (ret < 0) { |
3bd1e081 MD |
1883 | ERR("Spawning consumerd failed"); |
1884 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1885 | goto error; |
693bd40b | 1886 | } |
c49dc785 | 1887 | |
3bd1e081 MD |
1888 | /* Setting up the consumer_data pid */ |
1889 | consumer_data->pid = ret; | |
48842b30 | 1890 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1891 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1892 | |
3bd1e081 MD |
1893 | DBG2("Spawning consumer control thread"); |
1894 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1895 | if (ret < 0) { |
3bd1e081 | 1896 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1897 | goto error; |
1898 | } | |
1899 | ||
c49dc785 | 1900 | end: |
693bd40b DG |
1901 | return 0; |
1902 | ||
1903 | error: | |
edb8b045 DG |
1904 | /* Cleanup already created socket on error. */ |
1905 | if (consumer_data->err_sock >= 0) { | |
c617c0c6 MD |
1906 | int err; |
1907 | ||
edb8b045 DG |
1908 | err = close(consumer_data->err_sock); |
1909 | if (err < 0) { | |
1910 | PERROR("close consumer data error socket"); | |
1911 | } | |
1912 | } | |
693bd40b DG |
1913 | return ret; |
1914 | } | |
1915 | ||
44a5e5eb | 1916 | /* |
139ac872 MD |
1917 | * Compute health status of each consumer. If one of them is zero (bad |
1918 | * state), we return 0. | |
44a5e5eb DG |
1919 | */ |
1920 | static int check_consumer_health(void) | |
1921 | { | |
1922 | int ret; | |
1923 | ||
769b7d7e | 1924 | ret = health_check_state(HEALTH_TYPE_CONSUMER); |
44a5e5eb DG |
1925 | |
1926 | DBG3("Health consumer check %d", ret); | |
1927 | ||
1928 | return ret; | |
1929 | } | |
1930 | ||
b73401da | 1931 | /* |
096102bd | 1932 | * Setup necessary data for kernel tracer action. |
b73401da | 1933 | */ |
096102bd | 1934 | static int init_kernel_tracer(void) |
b73401da DG |
1935 | { |
1936 | int ret; | |
b73401da | 1937 | |
096102bd DG |
1938 | /* Modprobe lttng kernel modules */ |
1939 | ret = modprobe_lttng_control(); | |
b73401da | 1940 | if (ret < 0) { |
b73401da DG |
1941 | goto error; |
1942 | } | |
1943 | ||
096102bd DG |
1944 | /* Open debugfs lttng */ |
1945 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1946 | if (kernel_tracer_fd < 0) { | |
1947 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
1948 | ret = -1; |
1949 | goto error_open; | |
54d01ffb DG |
1950 | } |
1951 | ||
2f77fc4b DG |
1952 | /* Validate kernel version */ |
1953 | ret = kernel_validate_version(kernel_tracer_fd); | |
1954 | if (ret < 0) { | |
1955 | goto error_version; | |
b551a063 | 1956 | } |
54d01ffb | 1957 | |
2f77fc4b DG |
1958 | ret = modprobe_lttng_data(); |
1959 | if (ret < 0) { | |
1960 | goto error_modules; | |
54d01ffb DG |
1961 | } |
1962 | ||
2f77fc4b DG |
1963 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1964 | return 0; | |
1965 | ||
1966 | error_version: | |
1967 | modprobe_remove_lttng_control(); | |
1968 | ret = close(kernel_tracer_fd); | |
1969 | if (ret) { | |
1970 | PERROR("close"); | |
b551a063 | 1971 | } |
2f77fc4b | 1972 | kernel_tracer_fd = -1; |
f73fabfd | 1973 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1974 | |
2f77fc4b DG |
1975 | error_modules: |
1976 | ret = close(kernel_tracer_fd); | |
1977 | if (ret) { | |
1978 | PERROR("close"); | |
b551a063 | 1979 | } |
54d01ffb | 1980 | |
2f77fc4b DG |
1981 | error_open: |
1982 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1983 | |
1984 | error: | |
2f77fc4b DG |
1985 | WARN("No kernel tracer available"); |
1986 | kernel_tracer_fd = -1; | |
1987 | if (!is_root) { | |
f73fabfd | 1988 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1989 | } else { |
f73fabfd | 1990 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1991 | } |
54d01ffb DG |
1992 | } |
1993 | ||
2f77fc4b | 1994 | |
54d01ffb | 1995 | /* |
2f77fc4b DG |
1996 | * Copy consumer output from the tracing session to the domain session. The |
1997 | * function also applies the right modification on a per domain basis for the | |
1998 | * trace files destination directory. | |
54d01ffb | 1999 | */ |
2f77fc4b | 2000 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2001 | { |
2002 | int ret; | |
2f77fc4b DG |
2003 | const char *dir_name; |
2004 | struct consumer_output *consumer; | |
2005 | ||
2006 | assert(session); | |
2007 | assert(session->consumer); | |
54d01ffb | 2008 | |
b551a063 DG |
2009 | switch (domain) { |
2010 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2011 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2012 | /* |
2013 | * XXX: We should audit the session creation and what this function | |
2014 | * does "extra" in order to avoid a destroy since this function is used | |
2015 | * in the domain session creation (kernel and ust) only. Same for UST | |
2016 | * domain. | |
2017 | */ | |
2018 | if (session->kernel_session->consumer) { | |
2019 | consumer_destroy_output(session->kernel_session->consumer); | |
2020 | } | |
2f77fc4b DG |
2021 | session->kernel_session->consumer = |
2022 | consumer_copy_output(session->consumer); | |
2023 | /* Ease our life a bit for the next part */ | |
2024 | consumer = session->kernel_session->consumer; | |
2025 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2026 | break; |
2027 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2028 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2029 | if (session->ust_session->consumer) { |
2030 | consumer_destroy_output(session->ust_session->consumer); | |
2031 | } | |
2f77fc4b DG |
2032 | session->ust_session->consumer = |
2033 | consumer_copy_output(session->consumer); | |
2034 | /* Ease our life a bit for the next part */ | |
2035 | consumer = session->ust_session->consumer; | |
2036 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2037 | break; |
2038 | default: | |
f73fabfd | 2039 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2040 | goto error; |
2041 | } | |
2042 | ||
2f77fc4b | 2043 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2044 | strncat(consumer->subdir, dir_name, |
2045 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2046 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2047 | ||
f73fabfd | 2048 | ret = LTTNG_OK; |
54d01ffb DG |
2049 | |
2050 | error: | |
2051 | return ret; | |
2052 | } | |
2053 | ||
00e2e675 | 2054 | /* |
2f77fc4b | 2055 | * Create an UST session and add it to the session ust list. |
00e2e675 | 2056 | */ |
2f77fc4b DG |
2057 | static int create_ust_session(struct ltt_session *session, |
2058 | struct lttng_domain *domain) | |
00e2e675 DG |
2059 | { |
2060 | int ret; | |
2f77fc4b | 2061 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2062 | |
a4b92340 | 2063 | assert(session); |
2f77fc4b DG |
2064 | assert(domain); |
2065 | assert(session->consumer); | |
a4b92340 | 2066 | |
2f77fc4b DG |
2067 | switch (domain->type) { |
2068 | case LTTNG_DOMAIN_UST: | |
2069 | break; | |
2070 | default: | |
2071 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2072 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2073 | goto error; |
2074 | } | |
2075 | ||
2f77fc4b DG |
2076 | DBG("Creating UST session"); |
2077 | ||
2078 | lus = trace_ust_create_session(session->path, session->id, domain); | |
2079 | if (lus == NULL) { | |
f73fabfd | 2080 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2081 | goto error; |
2082 | } | |
2083 | ||
2f77fc4b DG |
2084 | lus->uid = session->uid; |
2085 | lus->gid = session->gid; | |
2086 | session->ust_session = lus; | |
00e2e675 | 2087 | |
2f77fc4b DG |
2088 | /* Copy session output to the newly created UST session */ |
2089 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2090 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2091 | goto error; |
2092 | } | |
2093 | ||
f73fabfd | 2094 | return LTTNG_OK; |
00e2e675 DG |
2095 | |
2096 | error: | |
2f77fc4b DG |
2097 | free(lus); |
2098 | session->ust_session = NULL; | |
00e2e675 DG |
2099 | return ret; |
2100 | } | |
2101 | ||
2102 | /* | |
2f77fc4b | 2103 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2104 | */ |
2f77fc4b | 2105 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2106 | { |
2107 | int ret; | |
a4b92340 | 2108 | |
2f77fc4b | 2109 | DBG("Creating kernel session"); |
00e2e675 | 2110 | |
2f77fc4b DG |
2111 | ret = kernel_create_session(session, kernel_tracer_fd); |
2112 | if (ret < 0) { | |
f73fabfd | 2113 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2114 | goto error; |
2115 | } | |
2116 | ||
2f77fc4b DG |
2117 | /* Code flow safety */ |
2118 | assert(session->kernel_session); | |
2119 | ||
2120 | /* Copy session output to the newly created Kernel session */ | |
2121 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2122 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2123 | goto error; |
2124 | } | |
2125 | ||
2f77fc4b DG |
2126 | /* Create directory(ies) on local filesystem. */ |
2127 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2128 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2129 | ret = run_as_mkdir_recursive( | |
2130 | session->kernel_session->consumer->dst.trace_path, | |
2131 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2132 | if (ret < 0) { | |
2133 | if (ret != -EEXIST) { | |
2134 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2135 | goto error; |
2136 | } | |
00e2e675 | 2137 | } |
2f77fc4b | 2138 | } |
00e2e675 | 2139 | |
2f77fc4b DG |
2140 | session->kernel_session->uid = session->uid; |
2141 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2142 | |
f73fabfd | 2143 | return LTTNG_OK; |
00e2e675 | 2144 | |
2f77fc4b DG |
2145 | error: |
2146 | trace_kernel_destroy_session(session->kernel_session); | |
2147 | session->kernel_session = NULL; | |
2148 | return ret; | |
2149 | } | |
00e2e675 | 2150 | |
2f77fc4b DG |
2151 | /* |
2152 | * Count number of session permitted by uid/gid. | |
2153 | */ | |
2154 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2155 | { | |
2156 | unsigned int i = 0; | |
2157 | struct ltt_session *session; | |
07424f16 | 2158 | |
2f77fc4b DG |
2159 | DBG("Counting number of available session for UID %d GID %d", |
2160 | uid, gid); | |
2161 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2162 | /* |
2f77fc4b | 2163 | * Only list the sessions the user can control. |
00e2e675 | 2164 | */ |
2f77fc4b DG |
2165 | if (!session_access_ok(session, uid, gid)) { |
2166 | continue; | |
2167 | } | |
2168 | i++; | |
a4b92340 | 2169 | } |
2f77fc4b | 2170 | return i; |
00e2e675 DG |
2171 | } |
2172 | ||
54d01ffb DG |
2173 | /* |
2174 | * Process the command requested by the lttng client within the command | |
2175 | * context structure. This function make sure that the return structure (llm) | |
2176 | * is set and ready for transmission before returning. | |
2177 | * | |
2178 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2179 | * |
2180 | * "sock" is only used for special-case var. len data. | |
54d01ffb | 2181 | */ |
53a80697 MD |
2182 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2183 | int *sock_error) | |
54d01ffb | 2184 | { |
f73fabfd | 2185 | int ret = LTTNG_OK; |
44d3bd01 | 2186 | int need_tracing_session = 1; |
2e09ba09 | 2187 | int need_domain; |
54d01ffb DG |
2188 | |
2189 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2190 | ||
53a80697 MD |
2191 | *sock_error = 0; |
2192 | ||
2e09ba09 MD |
2193 | switch (cmd_ctx->lsm->cmd_type) { |
2194 | case LTTNG_CREATE_SESSION: | |
2195 | case LTTNG_DESTROY_SESSION: | |
2196 | case LTTNG_LIST_SESSIONS: | |
2197 | case LTTNG_LIST_DOMAINS: | |
2198 | case LTTNG_START_TRACE: | |
2199 | case LTTNG_STOP_TRACE: | |
6d805429 | 2200 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2201 | need_domain = 0; |
3aace903 | 2202 | break; |
2e09ba09 MD |
2203 | default: |
2204 | need_domain = 1; | |
2205 | } | |
2206 | ||
2207 | if (opt_no_kernel && need_domain | |
2208 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2209 | if (!is_root) { |
f73fabfd | 2210 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2211 | } else { |
f73fabfd | 2212 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2213 | } |
4fba7219 DG |
2214 | goto error; |
2215 | } | |
2216 | ||
8d3113b2 DG |
2217 | /* Deny register consumer if we already have a spawned consumer. */ |
2218 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2219 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2220 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2221 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2222 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2223 | goto error; |
2224 | } | |
2225 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2226 | } | |
2227 | ||
54d01ffb DG |
2228 | /* |
2229 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2230 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2231 | * command. |
2232 | */ | |
2233 | switch(cmd_ctx->lsm->cmd_type) { | |
2234 | case LTTNG_LIST_SESSIONS: | |
2235 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2236 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2237 | case LTTNG_LIST_DOMAINS: |
2238 | case LTTNG_LIST_CHANNELS: | |
2239 | case LTTNG_LIST_EVENTS: | |
2240 | break; | |
2241 | default: | |
2242 | /* Setup lttng message with no payload */ | |
2243 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2244 | if (ret < 0) { | |
2245 | /* This label does not try to unlock the session */ | |
2246 | goto init_setup_error; | |
2247 | } | |
2248 | } | |
2249 | ||
2250 | /* Commands that DO NOT need a session. */ | |
2251 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2252 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2253 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2254 | case LTTNG_LIST_SESSIONS: |
2255 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2256 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2257 | need_tracing_session = 0; |
54d01ffb DG |
2258 | break; |
2259 | default: | |
2260 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2261 | /* |
2262 | * We keep the session list lock across _all_ commands | |
2263 | * for now, because the per-session lock does not | |
2264 | * handle teardown properly. | |
2265 | */ | |
74babd95 | 2266 | session_lock_list(); |
54d01ffb DG |
2267 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2268 | if (cmd_ctx->session == NULL) { | |
2269 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2270 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2271 | } else { |
2272 | /* If no session name specified */ | |
f73fabfd | 2273 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2274 | } |
2275 | goto error; | |
2276 | } else { | |
2277 | /* Acquire lock for the session */ | |
2278 | session_lock(cmd_ctx->session); | |
2279 | } | |
2280 | break; | |
2281 | } | |
b389abbe | 2282 | |
2e09ba09 MD |
2283 | if (!need_domain) { |
2284 | goto skip_domain; | |
2285 | } | |
a4b92340 | 2286 | |
54d01ffb DG |
2287 | /* |
2288 | * Check domain type for specific "pre-action". | |
2289 | */ | |
2290 | switch (cmd_ctx->lsm->domain.type) { | |
2291 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2292 | if (!is_root) { |
f73fabfd | 2293 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2294 | goto error; |
2295 | } | |
2296 | ||
54d01ffb | 2297 | /* Kernel tracer check */ |
a4b35e07 | 2298 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2299 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2300 | ret = init_kernel_tracer(); |
2301 | if (ret != 0) { | |
54d01ffb DG |
2302 | goto error; |
2303 | } | |
2304 | } | |
5eb91c98 | 2305 | |
5c827ce0 DG |
2306 | /* Consumer is in an ERROR state. Report back to client */ |
2307 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2308 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2309 | goto error; |
2310 | } | |
2311 | ||
54d01ffb | 2312 | /* Need a session for kernel command */ |
44d3bd01 | 2313 | if (need_tracing_session) { |
54d01ffb | 2314 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2315 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2316 | if (ret < 0) { |
f73fabfd | 2317 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2318 | goto error; |
2319 | } | |
b389abbe | 2320 | } |
7d29a247 | 2321 | |
54d01ffb | 2322 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2323 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2324 | if (kconsumer_data.pid == 0 && | |
a4b92340 DG |
2325 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2326 | cmd_ctx->session->start_consumer) { | |
3bd1e081 MD |
2327 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2328 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2329 | if (ret < 0) { |
f73fabfd | 2330 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2331 | goto error; |
950131af | 2332 | } |
5c827ce0 | 2333 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2334 | } else { |
2335 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2336 | } |
173af62f | 2337 | |
a4b92340 DG |
2338 | /* |
2339 | * The consumer was just spawned so we need to add the socket to | |
2340 | * the consumer output of the session if exist. | |
2341 | */ | |
2342 | ret = consumer_create_socket(&kconsumer_data, | |
2343 | cmd_ctx->session->kernel_session->consumer); | |
2344 | if (ret < 0) { | |
2345 | goto error; | |
173af62f | 2346 | } |
0d0c377a | 2347 | } |
5c827ce0 | 2348 | |
54d01ffb | 2349 | break; |
2bdd86d4 | 2350 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2351 | { |
5c827ce0 DG |
2352 | /* Consumer is in an ERROR state. Report back to client */ |
2353 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2354 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2355 | goto error; |
2356 | } | |
2357 | ||
44d3bd01 | 2358 | if (need_tracing_session) { |
a4b92340 | 2359 | /* Create UST session if none exist. */ |
f6a9efaa | 2360 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2361 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2362 | &cmd_ctx->lsm->domain); |
f73fabfd | 2363 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2364 | goto error; |
2365 | } | |
2366 | } | |
00e2e675 | 2367 | |
7753dea8 MD |
2368 | /* Start the UST consumer daemons */ |
2369 | /* 64-bit */ | |
2370 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2371 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2372 | ustconsumer64_data.pid == 0 && |
a4b92340 DG |
2373 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2374 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2375 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2376 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2377 | if (ret < 0) { |
f73fabfd | 2378 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2379 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2380 | goto error; |
2381 | } | |
48842b30 | 2382 | |
173af62f | 2383 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2384 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2385 | } else { |
7753dea8 MD |
2386 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2387 | } | |
173af62f DG |
2388 | |
2389 | /* | |
2390 | * Setup socket for consumer 64 bit. No need for atomic access | |
2391 | * since it was set above and can ONLY be set in this thread. | |
2392 | */ | |
a4b92340 DG |
2393 | ret = consumer_create_socket(&ustconsumer64_data, |
2394 | cmd_ctx->session->ust_session->consumer); | |
2395 | if (ret < 0) { | |
2396 | goto error; | |
173af62f DG |
2397 | } |
2398 | ||
7753dea8 | 2399 | /* 32-bit */ |
fc7a59ce | 2400 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2401 | ustconsumer32_data.pid == 0 && |
a4b92340 DG |
2402 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2403 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2404 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2405 | ret = start_consumerd(&ustconsumer32_data); | |
2406 | if (ret < 0) { | |
f73fabfd | 2407 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2408 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2409 | goto error; |
2410 | } | |
5c827ce0 | 2411 | |
173af62f | 2412 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2413 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2414 | } else { |
2415 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2416 | } |
173af62f DG |
2417 | |
2418 | /* | |
2419 | * Setup socket for consumer 64 bit. No need for atomic access | |
2420 | * since it was set above and can ONLY be set in this thread. | |
2421 | */ | |
a4b92340 DG |
2422 | ret = consumer_create_socket(&ustconsumer32_data, |
2423 | cmd_ctx->session->ust_session->consumer); | |
2424 | if (ret < 0) { | |
2425 | goto error; | |
173af62f | 2426 | } |
44d3bd01 DG |
2427 | } |
2428 | break; | |
48842b30 | 2429 | } |
54d01ffb | 2430 | default: |
54d01ffb DG |
2431 | break; |
2432 | } | |
2e09ba09 | 2433 | skip_domain: |
33a2b854 | 2434 | |
5c827ce0 DG |
2435 | /* Validate consumer daemon state when start/stop trace command */ |
2436 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2437 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2438 | switch (cmd_ctx->lsm->domain.type) { | |
2439 | case LTTNG_DOMAIN_UST: | |
2440 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2441 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2442 | goto error; |
2443 | } | |
2444 | break; | |
2445 | case LTTNG_DOMAIN_KERNEL: | |
2446 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2447 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2448 | goto error; |
2449 | } | |
2450 | break; | |
2451 | } | |
2452 | } | |
2453 | ||
8e0af1b4 MD |
2454 | /* |
2455 | * Check that the UID or GID match that of the tracing session. | |
2456 | * The root user can interact with all sessions. | |
2457 | */ | |
2458 | if (need_tracing_session) { | |
2459 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2460 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2461 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2462 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2463 | goto error; |
2464 | } | |
2465 | } | |
2466 | ||
54d01ffb DG |
2467 | /* Process by command type */ |
2468 | switch (cmd_ctx->lsm->cmd_type) { | |
2469 | case LTTNG_ADD_CONTEXT: | |
2470 | { | |
2471 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2472 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2473 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2474 | break; |
2475 | } | |
2476 | case LTTNG_DISABLE_CHANNEL: | |
2477 | { | |
2478 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2479 | cmd_ctx->lsm->u.disable.channel_name); | |
2480 | break; | |
2481 | } | |
2482 | case LTTNG_DISABLE_EVENT: | |
2483 | { | |
2484 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2485 | cmd_ctx->lsm->u.disable.channel_name, | |
2486 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2487 | break; |
2488 | } | |
54d01ffb DG |
2489 | case LTTNG_DISABLE_ALL_EVENT: |
2490 | { | |
2bdd86d4 | 2491 | DBG("Disabling all events"); |
54d01ffb DG |
2492 | |
2493 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2494 | cmd_ctx->lsm->u.disable.channel_name); | |
2495 | break; | |
2496 | } | |
00e2e675 DG |
2497 | case LTTNG_DISABLE_CONSUMER: |
2498 | { | |
2499 | ret = cmd_disable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); | |
2500 | break; | |
2501 | } | |
54d01ffb DG |
2502 | case LTTNG_ENABLE_CHANNEL: |
2503 | { | |
aea829b3 | 2504 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2505 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2506 | break; |
2507 | } | |
00e2e675 DG |
2508 | case LTTNG_ENABLE_CONSUMER: |
2509 | { | |
a4b92340 DG |
2510 | /* |
2511 | * XXX: 0 means that this URI should be applied on the session. Should | |
2512 | * be a DOMAIN enuam. | |
2513 | */ | |
00e2e675 | 2514 | ret = cmd_enable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); |
f73fabfd | 2515 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2516 | goto error; |
2517 | } | |
2518 | ||
2519 | if (cmd_ctx->lsm->domain.type == 0) { | |
2520 | /* Add the URI for the UST session if a consumer is present. */ | |
2521 | if (cmd_ctx->session->ust_session && | |
2522 | cmd_ctx->session->ust_session->consumer) { | |
2523 | ret = cmd_enable_consumer(LTTNG_DOMAIN_UST, cmd_ctx->session); | |
2524 | } else if (cmd_ctx->session->kernel_session && | |
2525 | cmd_ctx->session->kernel_session->consumer) { | |
2526 | ret = cmd_enable_consumer(LTTNG_DOMAIN_KERNEL, | |
2527 | cmd_ctx->session); | |
2528 | } | |
2529 | } | |
00e2e675 DG |
2530 | break; |
2531 | } | |
54d01ffb DG |
2532 | case LTTNG_ENABLE_EVENT: |
2533 | { | |
2534 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2535 | cmd_ctx->lsm->u.enable.channel_name, | |
025faf73 | 2536 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2537 | break; |
2538 | } | |
2539 | case LTTNG_ENABLE_ALL_EVENT: | |
2540 | { | |
2bdd86d4 | 2541 | DBG("Enabling all events"); |
54d01ffb DG |
2542 | |
2543 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 | 2544 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2545 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2546 | break; |
2547 | } | |
052da939 | 2548 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2549 | { |
9f19cc17 | 2550 | struct lttng_event *events; |
54d01ffb | 2551 | ssize_t nb_events; |
052da939 | 2552 | |
54d01ffb DG |
2553 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2554 | if (nb_events < 0) { | |
f73fabfd | 2555 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2556 | ret = -nb_events; |
2557 | goto error; | |
2ef84c95 DG |
2558 | } |
2559 | ||
2560 | /* | |
2561 | * Setup lttng message with payload size set to the event list size in | |
2562 | * bytes and then copy list into the llm payload. | |
2563 | */ | |
052da939 | 2564 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2565 | if (ret < 0) { |
052da939 | 2566 | free(events); |
2ef84c95 DG |
2567 | goto setup_error; |
2568 | } | |
2569 | ||
2570 | /* Copy event list into message payload */ | |
9f19cc17 | 2571 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2572 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2573 | |
9f19cc17 | 2574 | free(events); |
2ef84c95 | 2575 | |
f73fabfd | 2576 | ret = LTTNG_OK; |
2ef84c95 DG |
2577 | break; |
2578 | } | |
f37d259d MD |
2579 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2580 | { | |
2581 | struct lttng_event_field *fields; | |
2582 | ssize_t nb_fields; | |
2583 | ||
a4b92340 DG |
2584 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2585 | &fields); | |
f37d259d | 2586 | if (nb_fields < 0) { |
f73fabfd | 2587 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2588 | ret = -nb_fields; |
2589 | goto error; | |
2590 | } | |
2591 | ||
2592 | /* | |
2593 | * Setup lttng message with payload size set to the event list size in | |
2594 | * bytes and then copy list into the llm payload. | |
2595 | */ | |
a4b92340 DG |
2596 | ret = setup_lttng_msg(cmd_ctx, |
2597 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2598 | if (ret < 0) { |
2599 | free(fields); | |
2600 | goto setup_error; | |
2601 | } | |
2602 | ||
2603 | /* Copy event list into message payload */ | |
2604 | memcpy(cmd_ctx->llm->payload, fields, | |
2605 | sizeof(struct lttng_event_field) * nb_fields); | |
2606 | ||
2607 | free(fields); | |
2608 | ||
f73fabfd | 2609 | ret = LTTNG_OK; |
f37d259d MD |
2610 | break; |
2611 | } | |
00e2e675 DG |
2612 | case LTTNG_SET_CONSUMER_URI: |
2613 | { | |
a4b92340 DG |
2614 | size_t nb_uri, len; |
2615 | struct lttng_uri *uris; | |
2616 | ||
2617 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2618 | len = nb_uri * sizeof(struct lttng_uri); | |
2619 | ||
2620 | if (nb_uri == 0) { | |
f73fabfd | 2621 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2622 | goto error; |
2623 | } | |
2624 | ||
2625 | uris = zmalloc(len); | |
2626 | if (uris == NULL) { | |
f73fabfd | 2627 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2628 | goto error; |
2629 | } | |
2630 | ||
2631 | /* Receive variable len data */ | |
77c7c900 | 2632 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2633 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2634 | if (ret <= 0) { | |
2635 | DBG("No URIs received from client... continuing"); | |
2636 | *sock_error = 1; | |
f73fabfd | 2637 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2638 | free(uris); |
a4b92340 DG |
2639 | goto error; |
2640 | } | |
2641 | ||
00e2e675 | 2642 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2643 | nb_uri, uris); |
f73fabfd | 2644 | if (ret != LTTNG_OK) { |
b1d41407 | 2645 | free(uris); |
a4b92340 DG |
2646 | goto error; |
2647 | } | |
2648 | ||
2649 | /* | |
2650 | * XXX: 0 means that this URI should be applied on the session. Should | |
2651 | * be a DOMAIN enuam. | |
2652 | */ | |
2653 | if (cmd_ctx->lsm->domain.type == 0) { | |
2654 | /* Add the URI for the UST session if a consumer is present. */ | |
2655 | if (cmd_ctx->session->ust_session && | |
2656 | cmd_ctx->session->ust_session->consumer) { | |
2657 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2658 | nb_uri, uris); | |
2659 | } else if (cmd_ctx->session->kernel_session && | |
2660 | cmd_ctx->session->kernel_session->consumer) { | |
2661 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2662 | cmd_ctx->session, nb_uri, uris); | |
2663 | } | |
2664 | } | |
2665 | ||
b1d41407 DG |
2666 | free(uris); |
2667 | ||
00e2e675 DG |
2668 | break; |
2669 | } | |
f3ed775e | 2670 | case LTTNG_START_TRACE: |
8c0faa1d | 2671 | { |
54d01ffb | 2672 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2673 | break; |
2674 | } | |
f3ed775e | 2675 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2676 | { |
54d01ffb | 2677 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2678 | break; |
2679 | } | |
5e16da05 MD |
2680 | case LTTNG_CREATE_SESSION: |
2681 | { | |
a4b92340 DG |
2682 | size_t nb_uri, len; |
2683 | struct lttng_uri *uris = NULL; | |
2684 | ||
2685 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2686 | len = nb_uri * sizeof(struct lttng_uri); | |
2687 | ||
2688 | if (nb_uri > 0) { | |
2689 | uris = zmalloc(len); | |
2690 | if (uris == NULL) { | |
f73fabfd | 2691 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2692 | goto error; |
2693 | } | |
2694 | ||
2695 | /* Receive variable len data */ | |
77c7c900 | 2696 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2697 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2698 | if (ret <= 0) { | |
2699 | DBG("No URIs received from client... continuing"); | |
2700 | *sock_error = 1; | |
f73fabfd | 2701 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2702 | free(uris); |
a4b92340 DG |
2703 | goto error; |
2704 | } | |
2705 | ||
2706 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2707 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2708 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2709 | free(uris); |
a4b92340 DG |
2710 | goto error; |
2711 | } | |
2712 | } | |
2713 | ||
2714 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2715 | &cmd_ctx->creds); | |
2716 | ||
b1d41407 DG |
2717 | free(uris); |
2718 | ||
00e2e675 DG |
2719 | break; |
2720 | } | |
5e16da05 MD |
2721 | case LTTNG_DESTROY_SESSION: |
2722 | { | |
2f77fc4b | 2723 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2724 | |
2725 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2726 | cmd_ctx->session = NULL; |
5461b305 | 2727 | break; |
5e16da05 | 2728 | } |
9f19cc17 | 2729 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2730 | { |
54d01ffb DG |
2731 | ssize_t nb_dom; |
2732 | struct lttng_domain *domains; | |
5461b305 | 2733 | |
54d01ffb DG |
2734 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2735 | if (nb_dom < 0) { | |
f73fabfd | 2736 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2737 | ret = -nb_dom; |
2738 | goto error; | |
ce3d728c | 2739 | } |
520ff687 | 2740 | |
54d01ffb | 2741 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
2742 | if (ret < 0) { |
2743 | goto setup_error; | |
520ff687 | 2744 | } |
57167058 | 2745 | |
54d01ffb DG |
2746 | /* Copy event list into message payload */ |
2747 | memcpy(cmd_ctx->llm->payload, domains, | |
2748 | nb_dom * sizeof(struct lttng_domain)); | |
2749 | ||
2750 | free(domains); | |
5e16da05 | 2751 | |
f73fabfd | 2752 | ret = LTTNG_OK; |
5e16da05 MD |
2753 | break; |
2754 | } | |
9f19cc17 | 2755 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2756 | { |
6775595e | 2757 | int nb_chan; |
54d01ffb DG |
2758 | struct lttng_channel *channels; |
2759 | ||
b551a063 DG |
2760 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2761 | cmd_ctx->session, &channels); | |
54d01ffb | 2762 | if (nb_chan < 0) { |
f73fabfd | 2763 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2764 | ret = -nb_chan; |
2765 | goto error; | |
5461b305 | 2766 | } |
ca95a216 | 2767 | |
54d01ffb | 2768 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
2769 | if (ret < 0) { |
2770 | goto setup_error; | |
2771 | } | |
9f19cc17 | 2772 | |
54d01ffb DG |
2773 | /* Copy event list into message payload */ |
2774 | memcpy(cmd_ctx->llm->payload, channels, | |
2775 | nb_chan * sizeof(struct lttng_channel)); | |
2776 | ||
2777 | free(channels); | |
9f19cc17 | 2778 | |
f73fabfd | 2779 | ret = LTTNG_OK; |
5461b305 | 2780 | break; |
5e16da05 | 2781 | } |
9f19cc17 | 2782 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2783 | { |
b551a063 | 2784 | ssize_t nb_event; |
684d34d2 | 2785 | struct lttng_event *events = NULL; |
9f19cc17 | 2786 | |
b551a063 | 2787 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2788 | cmd_ctx->lsm->u.list.channel_name, &events); |
2789 | if (nb_event < 0) { | |
f73fabfd | 2790 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2791 | ret = -nb_event; |
2792 | goto error; | |
5461b305 | 2793 | } |
ca95a216 | 2794 | |
54d01ffb | 2795 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
2796 | if (ret < 0) { |
2797 | goto setup_error; | |
2798 | } | |
9f19cc17 | 2799 | |
54d01ffb DG |
2800 | /* Copy event list into message payload */ |
2801 | memcpy(cmd_ctx->llm->payload, events, | |
2802 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2803 | |
54d01ffb | 2804 | free(events); |
9f19cc17 | 2805 | |
f73fabfd | 2806 | ret = LTTNG_OK; |
5461b305 | 2807 | break; |
5e16da05 MD |
2808 | } |
2809 | case LTTNG_LIST_SESSIONS: | |
2810 | { | |
8e0af1b4 | 2811 | unsigned int nr_sessions; |
5461b305 | 2812 | |
8e0af1b4 | 2813 | session_lock_list(); |
730389d9 DG |
2814 | nr_sessions = lttng_sessions_count( |
2815 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
2816 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 2817 | |
8e0af1b4 | 2818 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 2819 | if (ret < 0) { |
54d01ffb | 2820 | session_unlock_list(); |
5461b305 | 2821 | goto setup_error; |
e065084a | 2822 | } |
5e16da05 | 2823 | |
6c9cc2ab | 2824 | /* Filled the session array */ |
2f77fc4b | 2825 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
2826 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2827 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 2828 | |
54d01ffb | 2829 | session_unlock_list(); |
5e16da05 | 2830 | |
f73fabfd | 2831 | ret = LTTNG_OK; |
5e16da05 MD |
2832 | break; |
2833 | } | |
d0254c7c MD |
2834 | case LTTNG_CALIBRATE: |
2835 | { | |
54d01ffb DG |
2836 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
2837 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
2838 | break; |
2839 | } | |
d9800920 DG |
2840 | case LTTNG_REGISTER_CONSUMER: |
2841 | { | |
2f77fc4b DG |
2842 | struct consumer_data *cdata; |
2843 | ||
2844 | switch (cmd_ctx->lsm->domain.type) { | |
2845 | case LTTNG_DOMAIN_KERNEL: | |
2846 | cdata = &kconsumer_data; | |
2847 | break; | |
2848 | default: | |
f73fabfd | 2849 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2850 | goto error; |
2851 | } | |
2852 | ||
54d01ffb | 2853 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2854 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
2855 | break; |
2856 | } | |
025faf73 | 2857 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
2858 | { |
2859 | struct lttng_filter_bytecode *bytecode; | |
2860 | ||
025faf73 | 2861 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 2862 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2863 | goto error; |
2864 | } | |
52df2401 MD |
2865 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
2866 | ret = LTTNG_ERR_FILTER_INVAL; | |
2867 | goto error; | |
2868 | } | |
025faf73 | 2869 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 2870 | if (!bytecode) { |
f73fabfd | 2871 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
2872 | goto error; |
2873 | } | |
2874 | /* Receive var. len. data */ | |
2875 | DBG("Receiving var len data from client ..."); | |
2876 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 2877 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
2878 | if (ret <= 0) { |
2879 | DBG("Nothing recv() from client var len data... continuing"); | |
2880 | *sock_error = 1; | |
f73fabfd | 2881 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2882 | goto error; |
2883 | } | |
2884 | ||
2885 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 2886 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 2887 | free(bytecode); |
f73fabfd | 2888 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2889 | goto error; |
2890 | } | |
2891 | ||
025faf73 DG |
2892 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2893 | cmd_ctx->lsm->u.enable.channel_name, | |
2894 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
2895 | break; |
2896 | } | |
6d805429 | 2897 | case LTTNG_DATA_PENDING: |
806e2684 | 2898 | { |
6d805429 | 2899 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
2900 | break; |
2901 | } | |
5e16da05 | 2902 | default: |
f73fabfd | 2903 | ret = LTTNG_ERR_UND; |
5461b305 | 2904 | break; |
fac6795d DG |
2905 | } |
2906 | ||
5461b305 | 2907 | error: |
5461b305 DG |
2908 | if (cmd_ctx->llm == NULL) { |
2909 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 2910 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
2911 | goto setup_error; |
2912 | } | |
2913 | } | |
54d01ffb | 2914 | /* Set return code */ |
5461b305 | 2915 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 2916 | setup_error: |
b5541356 | 2917 | if (cmd_ctx->session) { |
54d01ffb | 2918 | session_unlock(cmd_ctx->session); |
b5541356 | 2919 | } |
256a5576 MD |
2920 | if (need_tracing_session) { |
2921 | session_unlock_list(); | |
2922 | } | |
54d01ffb | 2923 | init_setup_error: |
8028d920 | 2924 | return ret; |
fac6795d DG |
2925 | } |
2926 | ||
44a5e5eb DG |
2927 | /* |
2928 | * Thread managing health check socket. | |
2929 | */ | |
2930 | static void *thread_manage_health(void *data) | |
2931 | { | |
eb4a2943 | 2932 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
2933 | uint32_t revents, nb_fd; |
2934 | struct lttng_poll_event events; | |
2935 | struct lttcomm_health_msg msg; | |
2936 | struct lttcomm_health_data reply; | |
2937 | ||
2938 | DBG("[thread] Manage health check started"); | |
2939 | ||
2940 | rcu_register_thread(); | |
2941 | ||
2942 | /* Create unix socket */ | |
2943 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
2944 | if (sock < 0) { | |
2945 | ERR("Unable to create health check Unix socket"); | |
2946 | ret = -1; | |
2947 | goto error; | |
2948 | } | |
2949 | ||
b662582b DG |
2950 | /* |
2951 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2952 | * show must go on. | |
2953 | */ | |
2954 | (void) utils_set_fd_cloexec(sock); | |
2955 | ||
44a5e5eb DG |
2956 | ret = lttcomm_listen_unix_sock(sock); |
2957 | if (ret < 0) { | |
2958 | goto error; | |
2959 | } | |
2960 | ||
2961 | /* | |
2962 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
2963 | * more will be added to this poll set. | |
2964 | */ | |
2965 | ret = create_thread_poll_set(&events, 2); | |
2966 | if (ret < 0) { | |
2967 | goto error; | |
2968 | } | |
2969 | ||
2970 | /* Add the application registration socket */ | |
2971 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
2972 | if (ret < 0) { | |
2973 | goto error; | |
2974 | } | |
2975 | ||
2976 | while (1) { | |
2977 | DBG("Health check ready"); | |
2978 | ||
44a5e5eb DG |
2979 | /* Inifinite blocking call, waiting for transmission */ |
2980 | restart: | |
2981 | ret = lttng_poll_wait(&events, -1); | |
2982 | if (ret < 0) { | |
2983 | /* | |
2984 | * Restart interrupted system call. | |
2985 | */ | |
2986 | if (errno == EINTR) { | |
2987 | goto restart; | |
2988 | } | |
2989 | goto error; | |
2990 | } | |
2991 | ||
0d9c5d77 DG |
2992 | nb_fd = ret; |
2993 | ||
44a5e5eb DG |
2994 | for (i = 0; i < nb_fd; i++) { |
2995 | /* Fetch once the poll data */ | |
2996 | revents = LTTNG_POLL_GETEV(&events, i); | |
2997 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
2998 | ||
2999 | /* Thread quit pipe has been closed. Killing thread. */ | |
3000 | ret = check_thread_quit_pipe(pollfd, revents); | |
3001 | if (ret) { | |
139ac872 MD |
3002 | err = 0; |
3003 | goto exit; | |
44a5e5eb DG |
3004 | } |
3005 | ||
3006 | /* Event on the registration socket */ | |
3007 | if (pollfd == sock) { | |
3008 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3009 | ERR("Health socket poll error"); | |
3010 | goto error; | |
3011 | } | |
3012 | } | |
3013 | } | |
3014 | ||
3015 | new_sock = lttcomm_accept_unix_sock(sock); | |
3016 | if (new_sock < 0) { | |
3017 | goto error; | |
3018 | } | |
3019 | ||
b662582b DG |
3020 | /* |
3021 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3022 | * show must go on. | |
3023 | */ | |
3024 | (void) utils_set_fd_cloexec(new_sock); | |
3025 | ||
44a5e5eb DG |
3026 | DBG("Receiving data from client for health..."); |
3027 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3028 | if (ret <= 0) { | |
3029 | DBG("Nothing recv() from client... continuing"); | |
3030 | ret = close(new_sock); | |
3031 | if (ret) { | |
3032 | PERROR("close"); | |
3033 | } | |
3034 | new_sock = -1; | |
3035 | continue; | |
3036 | } | |
3037 | ||
3038 | rcu_thread_online(); | |
3039 | ||
3040 | switch (msg.component) { | |
3041 | case LTTNG_HEALTH_CMD: | |
769b7d7e | 3042 | reply.ret_code = health_check_state(HEALTH_TYPE_CMD); |
44a5e5eb | 3043 | break; |
139ac872 | 3044 | case LTTNG_HEALTH_APP_MANAGE: |
769b7d7e | 3045 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE); |
139ac872 | 3046 | break; |
44a5e5eb | 3047 | case LTTNG_HEALTH_APP_REG: |
769b7d7e | 3048 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG); |
44a5e5eb DG |
3049 | break; |
3050 | case LTTNG_HEALTH_KERNEL: | |
769b7d7e | 3051 | reply.ret_code = health_check_state(HEALTH_TYPE_KERNEL); |
44a5e5eb DG |
3052 | break; |
3053 | case LTTNG_HEALTH_CONSUMER: | |
3054 | reply.ret_code = check_consumer_health(); | |
3055 | break; | |
3056 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 3057 | reply.ret_code = |
769b7d7e DG |
3058 | health_check_state(HEALTH_TYPE_APP_MANAGE) && |
3059 | health_check_state(HEALTH_TYPE_APP_REG) && | |
3060 | health_check_state(HEALTH_TYPE_CMD) && | |
3061 | health_check_state(HEALTH_TYPE_KERNEL) && | |
139ac872 | 3062 | check_consumer_health(); |
44a5e5eb DG |
3063 | break; |
3064 | default: | |
f73fabfd | 3065 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3066 | break; |
3067 | } | |
3068 | ||
3069 | /* | |
3070 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3071 | * the client where in the sessiond it is the opposite. Again, this is | |
3072 | * just to make things easier for us poor developer which enjoy a lot | |
3073 | * lazyness. | |
3074 | */ | |
3075 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3076 | reply.ret_code = !reply.ret_code; | |
3077 | } | |
3078 | ||
3079 | DBG2("Health check return value %d", reply.ret_code); | |
3080 | ||
3081 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3082 | if (ret < 0) { | |
3083 | ERR("Failed to send health data back to client"); | |
3084 | } | |
3085 | ||
3086 | /* End of transmission */ | |
3087 | ret = close(new_sock); | |
3088 | if (ret) { | |
3089 | PERROR("close"); | |
3090 | } | |
3091 | new_sock = -1; | |
3092 | } | |
3093 | ||
139ac872 | 3094 | exit: |
44a5e5eb | 3095 | error: |
139ac872 MD |
3096 | if (err) { |
3097 | ERR("Health error occurred in %s", __func__); | |
3098 | } | |
44a5e5eb DG |
3099 | DBG("Health check thread dying"); |
3100 | unlink(health_unix_sock_path); | |
3101 | if (sock >= 0) { | |
3102 | ret = close(sock); | |
3103 | if (ret) { | |
3104 | PERROR("close"); | |
3105 | } | |
3106 | } | |
3107 | if (new_sock >= 0) { | |
3108 | ret = close(new_sock); | |
3109 | if (ret) { | |
3110 | PERROR("close"); | |
3111 | } | |
3112 | } | |
3113 | ||
3114 | lttng_poll_clean(&events); | |
3115 | ||
3116 | rcu_unregister_thread(); | |
3117 | return NULL; | |
3118 | } | |
3119 | ||
1d4b027a | 3120 | /* |
d063d709 DG |
3121 | * This thread manage all clients request using the unix client socket for |
3122 | * communication. | |
1d4b027a DG |
3123 | */ |
3124 | static void *thread_manage_clients(void *data) | |
3125 | { | |
139ac872 | 3126 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3127 | int sock_error; |
5eb91c98 | 3128 | uint32_t revents, nb_fd; |
273ea72c | 3129 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3130 | struct lttng_poll_event events; |
1d4b027a DG |
3131 | |
3132 | DBG("[thread] Manage client started"); | |
3133 | ||
f6a9efaa DG |
3134 | rcu_register_thread(); |
3135 | ||
769b7d7e DG |
3136 | health_register(HEALTH_TYPE_CMD); |
3137 | ||
6993eeb3 CB |
3138 | if (testpoint(thread_manage_clients)) { |
3139 | goto error_testpoint; | |
3140 | } | |
3141 | ||
227e824a | 3142 | health_code_update(); |
44a5e5eb | 3143 | |
1d4b027a DG |
3144 | ret = lttcomm_listen_unix_sock(client_sock); |
3145 | if (ret < 0) { | |
35df2755 | 3146 | goto error_listen; |
1d4b027a DG |
3147 | } |
3148 | ||
5eb91c98 DG |
3149 | /* |
3150 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3151 | * more will be added to this poll set. | |
3152 | */ | |
3153 | ret = create_thread_poll_set(&events, 2); | |
3154 | if (ret < 0) { | |
35df2755 | 3155 | goto error_create_poll; |
5eb91c98 | 3156 | } |
273ea72c | 3157 | |
5eb91c98 DG |
3158 | /* Add the application registration socket */ |
3159 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3160 | if (ret < 0) { | |
3161 | goto error; | |
3162 | } | |
273ea72c | 3163 | |
bbd973c2 DG |
3164 | /* |
3165 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3166 | */ |
3167 | if (opt_sig_parent) { | |
8db8d1dc | 3168 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3169 | } |
3170 | ||
6993eeb3 CB |
3171 | if (testpoint(thread_manage_clients_before_loop)) { |
3172 | goto error; | |
3173 | } | |
8ac94142 | 3174 | |
227e824a | 3175 | health_code_update(); |
44a5e5eb | 3176 | |
1d4b027a | 3177 | while (1) { |
1d4b027a | 3178 | DBG("Accepting client command ..."); |
273ea72c DG |
3179 | |
3180 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3181 | restart: |
227e824a | 3182 | health_poll_update(); |
5eb91c98 | 3183 | ret = lttng_poll_wait(&events, -1); |
227e824a | 3184 | health_poll_update(); |
273ea72c | 3185 | if (ret < 0) { |
88f2b785 MD |
3186 | /* |
3187 | * Restart interrupted system call. | |
3188 | */ | |
3189 | if (errno == EINTR) { | |
3190 | goto restart; | |
3191 | } | |
273ea72c DG |
3192 | goto error; |
3193 | } | |
3194 | ||
0d9c5d77 DG |
3195 | nb_fd = ret; |
3196 | ||
5eb91c98 DG |
3197 | for (i = 0; i < nb_fd; i++) { |
3198 | /* Fetch once the poll data */ | |
3199 | revents = LTTNG_POLL_GETEV(&events, i); | |
3200 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3201 | ||
227e824a | 3202 | health_code_update(); |
44a5e5eb | 3203 | |
5eb91c98 DG |
3204 | /* Thread quit pipe has been closed. Killing thread. */ |
3205 | ret = check_thread_quit_pipe(pollfd, revents); | |
3206 | if (ret) { | |
139ac872 MD |
3207 | err = 0; |
3208 | goto exit; | |
5eb91c98 DG |
3209 | } |
3210 | ||
3211 | /* Event on the registration socket */ | |
3212 | if (pollfd == client_sock) { | |
3213 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3214 | ERR("Client socket poll error"); | |
3215 | goto error; | |
3216 | } | |
3217 | } | |
3218 | } | |
3219 | ||
3220 | DBG("Wait for client response"); | |
3221 | ||
227e824a | 3222 | health_code_update(); |
44a5e5eb | 3223 | |
5eb91c98 DG |
3224 | sock = lttcomm_accept_unix_sock(client_sock); |
3225 | if (sock < 0) { | |
273ea72c | 3226 | goto error; |
273ea72c DG |
3227 | } |
3228 | ||
b662582b DG |
3229 | /* |
3230 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3231 | * show must go on. | |
3232 | */ | |
3233 | (void) utils_set_fd_cloexec(sock); | |
3234 | ||
be040666 DG |
3235 | /* Set socket option for credentials retrieval */ |
3236 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3237 | if (ret < 0) { | |
3238 | goto error; | |
3239 | } | |
3240 | ||
5eb91c98 | 3241 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3242 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3243 | if (cmd_ctx == NULL) { |
76d7553f | 3244 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3245 | goto error; |
5eb91c98 | 3246 | } |
1d4b027a | 3247 | |
5eb91c98 | 3248 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3249 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3250 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3251 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3252 | goto error; |
3253 | } | |
1d4b027a | 3254 | |
5eb91c98 DG |
3255 | cmd_ctx->llm = NULL; |
3256 | cmd_ctx->session = NULL; | |
1d4b027a | 3257 | |
227e824a | 3258 | health_code_update(); |
44a5e5eb | 3259 | |
5eb91c98 DG |
3260 | /* |
3261 | * Data is received from the lttng client. The struct | |
3262 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3263 | * the client. | |
3264 | */ | |
3265 | DBG("Receiving data from client ..."); | |
be040666 DG |
3266 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3267 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3268 | if (ret <= 0) { |
3269 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3270 | ret = close(sock); |
3271 | if (ret) { | |
3272 | PERROR("close"); | |
3273 | } | |
3274 | sock = -1; | |
a2c0da86 | 3275 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3276 | continue; |
3277 | } | |
1d4b027a | 3278 | |
227e824a | 3279 | health_code_update(); |
44a5e5eb | 3280 | |
5eb91c98 DG |
3281 | // TODO: Validate cmd_ctx including sanity check for |
3282 | // security purpose. | |
f7776ea7 | 3283 | |
f6a9efaa | 3284 | rcu_thread_online(); |
5eb91c98 DG |
3285 | /* |
3286 | * This function dispatch the work to the kernel or userspace tracer | |
3287 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3288 | * informations for the client. The command context struct contains | |
3289 | * everything this function may needs. | |
3290 | */ | |
53a80697 | 3291 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3292 | rcu_thread_offline(); |
5eb91c98 | 3293 | if (ret < 0) { |
53a80697 MD |
3294 | if (sock_error) { |
3295 | ret = close(sock); | |
3296 | if (ret) { | |
3297 | PERROR("close"); | |
3298 | } | |
3299 | sock = -1; | |
3300 | } | |
bbd973c2 | 3301 | /* |
5eb91c98 | 3302 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3303 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3304 | * (ENOMEM). Error detected but still accept |
3305 | * command, unless a socket error has been | |
3306 | * detected. | |
bbd973c2 | 3307 | */ |
bbd973c2 | 3308 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3309 | continue; |
3310 | } | |
d6e4fca4 | 3311 | |
227e824a | 3312 | health_code_update(); |
44a5e5eb | 3313 | |
54d01ffb DG |
3314 | DBG("Sending response (size: %d, retcode: %s)", |
3315 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3316 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3317 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3318 | if (ret < 0) { |
3319 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3320 | } |
1d4b027a | 3321 | |
5eb91c98 | 3322 | /* End of transmission */ |
76d7553f MD |
3323 | ret = close(sock); |
3324 | if (ret) { | |
3325 | PERROR("close"); | |
3326 | } | |
3327 | sock = -1; | |
be040666 DG |
3328 | |
3329 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3330 | |
227e824a | 3331 | health_code_update(); |
273ea72c DG |
3332 | } |
3333 | ||
139ac872 | 3334 | exit: |
5eb91c98 | 3335 | error: |
35df2755 CB |
3336 | if (sock >= 0) { |
3337 | ret = close(sock); | |
3338 | if (ret) { | |
3339 | PERROR("close"); | |
3340 | } | |
139ac872 | 3341 | } |
44a5e5eb | 3342 | |
35df2755 CB |
3343 | lttng_poll_clean(&events); |
3344 | clean_command_ctx(&cmd_ctx); | |
3345 | ||
3346 | error_listen: | |
3347 | error_create_poll: | |
6993eeb3 | 3348 | error_testpoint: |
273ea72c | 3349 | unlink(client_unix_sock_path); |
76d7553f MD |
3350 | if (client_sock >= 0) { |
3351 | ret = close(client_sock); | |
3352 | if (ret) { | |
3353 | PERROR("close"); | |
3354 | } | |
a4b35e07 | 3355 | } |
35df2755 CB |
3356 | |
3357 | if (err) { | |
227e824a | 3358 | health_error(); |
35df2755 | 3359 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3360 | } |
273ea72c | 3361 | |
769b7d7e | 3362 | health_unregister(); |
35df2755 CB |
3363 | |
3364 | DBG("Client thread dying"); | |
f6a9efaa DG |
3365 | |
3366 | rcu_unregister_thread(); | |
1d4b027a DG |
3367 | return NULL; |
3368 | } | |
3369 | ||
3370 | ||
fac6795d DG |
3371 | /* |
3372 | * usage function on stderr | |
3373 | */ | |
3374 | static void usage(void) | |
3375 | { | |
b716ce68 | 3376 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3377 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3378 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3379 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3380 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3381 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3382 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3383 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3384 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3385 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3386 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3387 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3388 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3389 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3390 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3391 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3392 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3393 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3394 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3395 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3396 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3397 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3398 | } |
3399 | ||
3400 | /* | |
3401 | * daemon argument parsing | |
3402 | */ | |
3403 | static int parse_args(int argc, char **argv) | |
3404 | { | |
3405 | int c; | |
3406 | ||
3407 | static struct option long_options[] = { | |
3408 | { "client-sock", 1, 0, 'c' }, | |
3409 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3410 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3411 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3412 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3413 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3414 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3415 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3416 | { "consumerd32-path", 1, 0, 'u' }, | |
3417 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3418 | { "consumerd64-path", 1, 0, 't' }, | |
3419 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3420 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3421 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3422 | { "help", 0, 0, 'h' }, |
3423 | { "group", 1, 0, 'g' }, | |
3424 | { "version", 0, 0, 'V' }, | |
75462a81 | 3425 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3426 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3427 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3428 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3429 | { NULL, 0, 0, 0 } |
3430 | }; | |
3431 | ||
3432 | while (1) { | |
3433 | int option_index = 0; | |
4fba7219 | 3434 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3435 | long_options, &option_index); |
fac6795d DG |
3436 | if (c == -1) { |
3437 | break; | |
3438 | } | |
3439 | ||
3440 | switch (c) { | |
3441 | case 0: | |
3442 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3443 | if (optarg) { | |
3444 | fprintf(stderr, " with arg %s\n", optarg); | |
3445 | } | |
3446 | break; | |
b716ce68 | 3447 | case 'c': |
fac6795d DG |
3448 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3449 | break; | |
3450 | case 'a': | |
3451 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3452 | break; | |
3453 | case 'd': | |
3454 | opt_daemon = 1; | |
3455 | break; | |
3456 | case 'g': | |
fb09408a | 3457 | opt_tracing_group = optarg; |
fac6795d DG |
3458 | break; |
3459 | case 'h': | |
3460 | usage(); | |
3461 | exit(EXIT_FAILURE); | |
3462 | case 'V': | |
3463 | fprintf(stdout, "%s\n", VERSION); | |
3464 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3465 | case 'S': |
3466 | opt_sig_parent = 1; | |
3467 | break; | |
d6f42150 | 3468 | case 'E': |
3bd1e081 | 3469 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3470 | break; |
3471 | case 'C': | |
3bd1e081 MD |
3472 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3473 | break; | |
3474 | case 'F': | |
7753dea8 | 3475 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3476 | break; |
3477 | case 'D': | |
7753dea8 MD |
3478 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3479 | break; | |
3480 | case 'H': | |
3481 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3482 | break; | |
3483 | case 'G': | |
3484 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3485 | break; |
4fba7219 DG |
3486 | case 'N': |
3487 | opt_no_kernel = 1; | |
3488 | break; | |
75462a81 | 3489 | case 'q': |
97e19046 | 3490 | lttng_opt_quiet = 1; |
75462a81 | 3491 | break; |
3f9947db | 3492 | case 'v': |
53086306 | 3493 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3494 | lttng_opt_verbose += 1; |
3f9947db | 3495 | break; |
31f73cc9 | 3496 | case 'Z': |
3bd1e081 | 3497 | opt_verbose_consumer += 1; |
31f73cc9 | 3498 | break; |
fb09408a | 3499 | case 'u': |
fc7a59ce | 3500 | consumerd32_bin= optarg; |
ebaeda94 MD |
3501 | break; |
3502 | case 'U': | |
3503 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3504 | break; |
3505 | case 't': | |
fc7a59ce | 3506 | consumerd64_bin = optarg; |
ebaeda94 MD |
3507 | break; |
3508 | case 'T': | |
3509 | consumerd64_libdir = optarg; | |
fb09408a | 3510 | break; |
fac6795d DG |
3511 | default: |
3512 | /* Unknown option or other error. | |
3513 | * Error is printed by getopt, just return */ | |
3514 | return -1; | |
3515 | } | |
3516 | } | |
3517 | ||
3518 | return 0; | |
3519 | } | |
3520 | ||
3521 | /* | |
d063d709 | 3522 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3523 | * apps_sock - The communication socket for all UST apps. |
3524 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3525 | */ |
cf3af59e | 3526 | static int init_daemon_socket(void) |
fac6795d DG |
3527 | { |
3528 | int ret = 0; | |
3529 | mode_t old_umask; | |
3530 | ||
3531 | old_umask = umask(0); | |
3532 | ||
3533 | /* Create client tool unix socket */ | |
d6f42150 DG |
3534 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3535 | if (client_sock < 0) { | |
3536 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3537 | ret = -1; |
3538 | goto end; | |
3539 | } | |
3540 | ||
b662582b DG |
3541 | /* Set the cloexec flag */ |
3542 | ret = utils_set_fd_cloexec(client_sock); | |
3543 | if (ret < 0) { | |
3544 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3545 | "Continuing but note that the consumer daemon will have a " | |
3546 | "reference to this socket on exec()", client_sock); | |
3547 | } | |
3548 | ||
fac6795d DG |
3549 | /* File permission MUST be 660 */ |
3550 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3551 | if (ret < 0) { | |
d6f42150 | 3552 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3553 | PERROR("chmod"); |
fac6795d DG |
3554 | goto end; |
3555 | } | |
3556 | ||
3557 | /* Create the application unix socket */ | |
d6f42150 DG |
3558 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3559 | if (apps_sock < 0) { | |
3560 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3561 | ret = -1; |
3562 | goto end; | |
3563 | } | |
3564 | ||
b662582b DG |
3565 | /* Set the cloexec flag */ |
3566 | ret = utils_set_fd_cloexec(apps_sock); | |
3567 | if (ret < 0) { | |
3568 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3569 | "Continuing but note that the consumer daemon will have a " | |
3570 | "reference to this socket on exec()", apps_sock); | |
3571 | } | |
3572 | ||
d6f42150 | 3573 | /* File permission MUST be 666 */ |
54d01ffb DG |
3574 | ret = chmod(apps_unix_sock_path, |
3575 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3576 | if (ret < 0) { |
d6f42150 | 3577 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3578 | PERROR("chmod"); |
fac6795d DG |
3579 | goto end; |
3580 | } | |
3581 | ||
b662582b DG |
3582 | DBG3("Session daemon client socket %d and application socket %d created", |
3583 | client_sock, apps_sock); | |
3584 | ||
fac6795d DG |
3585 | end: |
3586 | umask(old_umask); | |
3587 | return ret; | |
3588 | } | |
3589 | ||
3590 | /* | |
54d01ffb DG |
3591 | * Check if the global socket is available, and if a daemon is answering at the |
3592 | * other side. If yes, error is returned. | |
fac6795d | 3593 | */ |
cf3af59e | 3594 | static int check_existing_daemon(void) |
fac6795d | 3595 | { |
7d8234d9 | 3596 | /* Is there anybody out there ? */ |
099e26bd | 3597 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3598 | return -EEXIST; |
099e26bd | 3599 | } |
b09c7c76 DG |
3600 | |
3601 | return 0; | |
fac6795d DG |
3602 | } |
3603 | ||
fac6795d | 3604 | /* |
d063d709 | 3605 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3606 | * |
d063d709 | 3607 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3608 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3609 | */ |
be040666 | 3610 | static int set_permissions(char *rundir) |
fac6795d DG |
3611 | { |
3612 | int ret; | |
996b65c8 | 3613 | gid_t gid; |
fac6795d | 3614 | |
6775595e DG |
3615 | ret = allowed_group(); |
3616 | if (ret < 0) { | |
be040666 DG |
3617 | WARN("No tracing group detected"); |
3618 | ret = 0; | |
fac6795d DG |
3619 | goto end; |
3620 | } | |
3621 | ||
6775595e DG |
3622 | gid = ret; |
3623 | ||
d6f42150 | 3624 | /* Set lttng run dir */ |
be040666 | 3625 | ret = chown(rundir, 0, gid); |
d6f42150 | 3626 | if (ret < 0) { |
be040666 | 3627 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3628 | PERROR("chown"); |
d6f42150 DG |
3629 | } |
3630 | ||
d1613cf5 | 3631 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3632 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3633 | if (ret < 0) { |
3634 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3635 | PERROR("chmod"); |
d1613cf5 JN |
3636 | } |
3637 | ||
d6f42150 | 3638 | /* lttng client socket path */ |
996b65c8 | 3639 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3640 | if (ret < 0) { |
d6f42150 | 3641 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3642 | PERROR("chown"); |
d6f42150 DG |
3643 | } |
3644 | ||
3bd1e081 MD |
3645 | /* kconsumer error socket path */ |
3646 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3647 | if (ret < 0) { |
3bd1e081 | 3648 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3649 | PERROR("chown"); |
3bd1e081 MD |
3650 | } |
3651 | ||
7753dea8 MD |
3652 | /* 64-bit ustconsumer error socket path */ |
3653 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3654 | if (ret < 0) { | |
3655 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3656 | PERROR("chown"); |
7753dea8 MD |
3657 | } |
3658 | ||
3659 | /* 32-bit ustconsumer compat32 error socket path */ | |
3660 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3661 | if (ret < 0) { |
7753dea8 | 3662 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3663 | PERROR("chown"); |
fac6795d DG |
3664 | } |
3665 | ||
d6f42150 | 3666 | DBG("All permissions are set"); |
e07ae692 | 3667 | |
fac6795d DG |
3668 | end: |
3669 | return ret; | |
3670 | } | |
3671 | ||
d6f42150 | 3672 | /* |
d063d709 | 3673 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3674 | */ |
67e40797 | 3675 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3676 | { |
3677 | int ret; | |
3678 | ||
67e40797 DG |
3679 | DBG3("Creating LTTng run directory: %s", rundir); |
3680 | ||
d1613cf5 | 3681 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3682 | if (ret < 0) { |
b1f11e69 | 3683 | if (errno != EEXIST) { |
67e40797 | 3684 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3685 | goto error; |
3686 | } else { | |
3687 | ret = 0; | |
3688 | } | |
d6f42150 DG |
3689 | } |
3690 | ||
3691 | error: | |
3692 | return ret; | |
3693 | } | |
3694 | ||
3695 | /* | |
d063d709 DG |
3696 | * Setup sockets and directory needed by the kconsumerd communication with the |
3697 | * session daemon. | |
d6f42150 | 3698 | */ |
67e40797 DG |
3699 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3700 | const char *rundir) | |
d6f42150 DG |
3701 | { |
3702 | int ret; | |
67e40797 | 3703 | char path[PATH_MAX]; |
d6f42150 | 3704 | |
67e40797 | 3705 | switch (consumer_data->type) { |
7753dea8 | 3706 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3707 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3708 | break; |
3709 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3710 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3711 | break; |
3712 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3713 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3714 | break; |
3715 | default: | |
3716 | ERR("Consumer type unknown"); | |
3717 | ret = -EINVAL; | |
3718 | goto error; | |
d6f42150 DG |
3719 | } |
3720 | ||
67e40797 DG |
3721 | DBG2("Creating consumer directory: %s", path); |
3722 | ||
d1613cf5 | 3723 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3724 | if (ret < 0) { |
6beb2242 | 3725 | if (errno != EEXIST) { |
f11e84c2 | 3726 | PERROR("mkdir"); |
3bd1e081 | 3727 | ERR("Failed to create %s", path); |
6beb2242 DG |
3728 | goto error; |
3729 | } | |
f11e84c2 | 3730 | ret = -1; |
d6f42150 DG |
3731 | } |
3732 | ||
3733 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3734 | consumer_data->err_sock = |
3735 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3736 | if (consumer_data->err_sock < 0) { | |
3737 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3738 | ret = -1; |
3739 | goto error; | |
3740 | } | |
3741 | ||
3742 | /* File permission MUST be 660 */ | |
3bd1e081 | 3743 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3744 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3745 | if (ret < 0) { |
3bd1e081 | 3746 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3747 | PERROR("chmod"); |
d6f42150 DG |
3748 | goto error; |
3749 | } | |
3750 | ||
3751 | error: | |
3752 | return ret; | |
3753 | } | |
3754 | ||
fac6795d | 3755 | /* |
d063d709 | 3756 | * Signal handler for the daemon |
cf3af59e | 3757 | * |
54d01ffb DG |
3758 | * Simply stop all worker threads, leaving main() return gracefully after |
3759 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3760 | */ |
3761 | static void sighandler(int sig) | |
3762 | { | |
3763 | switch (sig) { | |
cf3af59e | 3764 | case SIGPIPE: |
af87c45a | 3765 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3766 | return; |
3767 | case SIGINT: | |
af87c45a | 3768 | DBG("SIGINT caught"); |
cf3af59e MD |
3769 | stop_threads(); |
3770 | break; | |
3771 | case SIGTERM: | |
af87c45a | 3772 | DBG("SIGTERM caught"); |
cf3af59e MD |
3773 | stop_threads(); |
3774 | break; | |
3775 | default: | |
3776 | break; | |
fac6795d | 3777 | } |
fac6795d DG |
3778 | } |
3779 | ||
3780 | /* | |
d063d709 | 3781 | * Setup signal handler for : |
1d4b027a | 3782 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3783 | */ |
1d4b027a | 3784 | static int set_signal_handler(void) |
fac6795d | 3785 | { |
1d4b027a DG |
3786 | int ret = 0; |
3787 | struct sigaction sa; | |
3788 | sigset_t sigset; | |
fac6795d | 3789 | |
1d4b027a | 3790 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3791 | PERROR("sigemptyset"); |
1d4b027a DG |
3792 | return ret; |
3793 | } | |
d6f42150 | 3794 | |
1d4b027a DG |
3795 | sa.sa_handler = sighandler; |
3796 | sa.sa_mask = sigset; | |
3797 | sa.sa_flags = 0; | |
3798 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3799 | PERROR("sigaction"); |
1d4b027a | 3800 | return ret; |
d6f42150 DG |
3801 | } |
3802 | ||
1d4b027a | 3803 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 3804 | PERROR("sigaction"); |
1d4b027a | 3805 | return ret; |
d6f42150 | 3806 | } |
aaf26714 | 3807 | |
1d4b027a | 3808 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 3809 | PERROR("sigaction"); |
1d4b027a | 3810 | return ret; |
8c0faa1d DG |
3811 | } |
3812 | ||
1d4b027a DG |
3813 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3814 | ||
3815 | return ret; | |
fac6795d DG |
3816 | } |
3817 | ||
f3ed775e | 3818 | /* |
d063d709 DG |
3819 | * Set open files limit to unlimited. This daemon can open a large number of |
3820 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3821 | */ |
3822 | static void set_ulimit(void) | |
3823 | { | |
3824 | int ret; | |
3825 | struct rlimit lim; | |
3826 | ||
a88df331 | 3827 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3828 | lim.rlim_cur = 65535; |
3829 | lim.rlim_max = 65535; | |
3830 | ||
3831 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3832 | if (ret < 0) { | |
76d7553f | 3833 | PERROR("failed to set open files limit"); |
f3ed775e DG |
3834 | } |
3835 | } | |
3836 | ||
fac6795d DG |
3837 | /* |
3838 | * main | |
3839 | */ | |
3840 | int main(int argc, char **argv) | |
3841 | { | |
fac6795d DG |
3842 | int ret = 0; |
3843 | void *status; | |
ae9e45b3 | 3844 | const char *home_path, *env_app_timeout; |
fac6795d | 3845 | |
335a95b7 MD |
3846 | init_kernel_workarounds(); |
3847 | ||
f6a9efaa DG |
3848 | rcu_register_thread(); |
3849 | ||
7753dea8 | 3850 | setup_consumerd_path(); |
fb09408a | 3851 | |
fac6795d DG |
3852 | /* Parse arguments */ |
3853 | progname = argv[0]; | |
c617c0c6 | 3854 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 3855 | goto error; |
fac6795d DG |
3856 | } |
3857 | ||
3858 | /* Daemonize */ | |
3859 | if (opt_daemon) { | |
ceed52b5 MD |
3860 | int i; |
3861 | ||
3862 | /* | |
3863 | * fork | |
3864 | * child: setsid, close FD 0, 1, 2, chdir / | |
3865 | * parent: exit (if fork is successful) | |
3866 | */ | |
53094c05 DG |
3867 | ret = daemon(0, 0); |
3868 | if (ret < 0) { | |
76d7553f | 3869 | PERROR("daemon"); |
cf3af59e | 3870 | goto error; |
53094c05 | 3871 | } |
ceed52b5 MD |
3872 | /* |
3873 | * We are in the child. Make sure all other file | |
3874 | * descriptors are closed, in case we are called with | |
3875 | * more opened file descriptors than the standard ones. | |
3876 | */ | |
3877 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3878 | (void) close(i); | |
3879 | } | |
3880 | } | |
3881 | ||
3882 | /* Create thread quit pipe */ | |
3883 | if ((ret = init_thread_quit_pipe()) < 0) { | |
3884 | goto error; | |
fac6795d DG |
3885 | } |
3886 | ||
3887 | /* Check if daemon is UID = 0 */ | |
3888 | is_root = !getuid(); | |
3889 | ||
fac6795d | 3890 | if (is_root) { |
990570ed | 3891 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
3892 | |
3893 | /* Create global run dir with root access */ | |
3894 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 3895 | if (ret < 0) { |
cf3af59e | 3896 | goto error; |
d6f42150 DG |
3897 | } |
3898 | ||
fac6795d | 3899 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
3900 | snprintf(apps_unix_sock_path, PATH_MAX, |
3901 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
3902 | } |
3903 | ||
3904 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
3905 | snprintf(client_unix_sock_path, PATH_MAX, |
3906 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
3907 | } | |
0fdd1e2c DG |
3908 | |
3909 | /* Set global SHM for ust */ | |
3910 | if (strlen(wait_shm_path) == 0) { | |
3911 | snprintf(wait_shm_path, PATH_MAX, | |
3912 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
3913 | } | |
67e40797 | 3914 | |
44a5e5eb DG |
3915 | if (strlen(health_unix_sock_path) == 0) { |
3916 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3917 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
3918 | } | |
3919 | ||
67e40797 DG |
3920 | /* Setup kernel consumerd path */ |
3921 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3922 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 3923 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3924 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3925 | |
3926 | DBG2("Kernel consumer err path: %s", | |
3927 | kconsumer_data.err_unix_sock_path); | |
3928 | DBG2("Kernel consumer cmd path: %s", | |
3929 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 3930 | } else { |
b082db07 DG |
3931 | home_path = get_home_dir(); |
3932 | if (home_path == NULL) { | |
273ea72c DG |
3933 | /* TODO: Add --socket PATH option */ |
3934 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
3935 | ret = -EPERM; |
3936 | goto error; | |
b082db07 DG |
3937 | } |
3938 | ||
67e40797 DG |
3939 | /* |
3940 | * Create rundir from home path. This will create something like | |
3941 | * $HOME/.lttng | |
3942 | */ | |
990570ed | 3943 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
3944 | if (ret < 0) { |
3945 | ret = -ENOMEM; | |
3946 | goto error; | |
3947 | } | |
3948 | ||
3949 | ret = create_lttng_rundir(rundir); | |
3950 | if (ret < 0) { | |
3951 | goto error; | |
3952 | } | |
3953 | ||
fac6795d | 3954 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 3955 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 3956 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
3957 | } |
3958 | ||
3959 | /* Set the cli tool unix socket path */ | |
3960 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 3961 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 3962 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 3963 | } |
0fdd1e2c DG |
3964 | |
3965 | /* Set global SHM for ust */ | |
3966 | if (strlen(wait_shm_path) == 0) { | |
3967 | snprintf(wait_shm_path, PATH_MAX, | |
3968 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
3969 | } | |
44a5e5eb DG |
3970 | |
3971 | /* Set health check Unix path */ | |
3972 | if (strlen(health_unix_sock_path) == 0) { | |
3973 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3974 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
3975 | } | |
fac6795d DG |
3976 | } |
3977 | ||
5c827ce0 DG |
3978 | /* Set consumer initial state */ |
3979 | kernel_consumerd_state = CONSUMER_STOPPED; | |
3980 | ust_consumerd_state = CONSUMER_STOPPED; | |
3981 | ||
847177cd DG |
3982 | DBG("Client socket path %s", client_unix_sock_path); |
3983 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
3984 | DBG("LTTng run directory path: %s", rundir); |
3985 | ||
3986 | /* 32 bits consumerd path setup */ | |
3987 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3988 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 3989 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3990 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3991 | |
3992 | DBG2("UST consumer 32 bits err path: %s", | |
3993 | ustconsumer32_data.err_unix_sock_path); | |
3994 | DBG2("UST consumer 32 bits cmd path: %s", | |
3995 | ustconsumer32_data.cmd_unix_sock_path); | |
3996 | ||
3997 | /* 64 bits consumerd path setup */ | |
3998 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3999 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4000 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4001 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4002 | |
4003 | DBG2("UST consumer 64 bits err path: %s", | |
4004 | ustconsumer64_data.err_unix_sock_path); | |
4005 | DBG2("UST consumer 64 bits cmd path: %s", | |
4006 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4007 | |
273ea72c | 4008 | /* |
7d8234d9 | 4009 | * See if daemon already exist. |
fac6795d | 4010 | */ |
7d8234d9 | 4011 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4012 | ERR("Already running daemon.\n"); |
273ea72c | 4013 | /* |
cf3af59e MD |
4014 | * We do not goto exit because we must not cleanup() |
4015 | * because a daemon is already running. | |
ab118b20 | 4016 | */ |
cf3af59e | 4017 | goto error; |
a88df331 DG |
4018 | } |
4019 | ||
1427f9b2 DG |
4020 | /* |
4021 | * Init UST app hash table. Alloc hash table before this point since | |
4022 | * cleanup() can get called after that point. | |
4023 | */ | |
4024 | ust_app_ht_alloc(); | |
4025 | ||
54d01ffb | 4026 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4027 | |
4028 | /* | |
4029 | * These actions must be executed as root. We do that *after* setting up | |
4030 | * the sockets path because we MUST make the check for another daemon using | |
4031 | * those paths *before* trying to set the kernel consumer sockets and init | |
4032 | * kernel tracer. | |
4033 | */ | |
4034 | if (is_root) { | |
67e40797 | 4035 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4036 | if (ret < 0) { |
4037 | goto exit; | |
4038 | } | |
4039 | ||
a88df331 | 4040 | /* Setup kernel tracer */ |
4fba7219 DG |
4041 | if (!opt_no_kernel) { |
4042 | init_kernel_tracer(); | |
4043 | } | |
a88df331 DG |
4044 | |
4045 | /* Set ulimit for open files */ | |
4046 | set_ulimit(); | |
fac6795d | 4047 | } |
4063050c MD |
4048 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4049 | lttng_fd_init(); | |
fac6795d | 4050 | |
67e40797 DG |
4051 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4052 | if (ret < 0) { | |
4053 | goto exit; | |
4054 | } | |
4055 | ||
4056 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4057 | if (ret < 0) { | |
4058 | goto exit; | |
4059 | } | |
4060 | ||
cf3af59e MD |
4061 | if ((ret = set_signal_handler()) < 0) { |
4062 | goto exit; | |
fac6795d DG |
4063 | } |
4064 | ||
d6f42150 | 4065 | /* Setup the needed unix socket */ |
cf3af59e MD |
4066 | if ((ret = init_daemon_socket()) < 0) { |
4067 | goto exit; | |
fac6795d DG |
4068 | } |
4069 | ||
4070 | /* Set credentials to socket */ | |
be040666 | 4071 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4072 | goto exit; |
fac6795d DG |
4073 | } |
4074 | ||
5b8719f5 DG |
4075 | /* Get parent pid if -S, --sig-parent is specified. */ |
4076 | if (opt_sig_parent) { | |
4077 | ppid = getppid(); | |
4078 | } | |
4079 | ||
7a485870 | 4080 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4081 | if (is_root && !opt_no_kernel) { |
4082 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4083 | goto exit; | |
4084 | } | |
7a485870 DG |
4085 | } |
4086 | ||
099e26bd | 4087 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4088 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4089 | goto exit; |
4090 | } | |
4091 | ||
4092 | /* Init UST command queue. */ | |
4093 | cds_wfq_init(&ust_cmd_queue.queue); | |
4094 | ||
273ea72c | 4095 | /* |
54d01ffb DG |
4096 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4097 | * statically declared in session.c | |
273ea72c | 4098 | */ |
54d01ffb | 4099 | session_list_ptr = session_get_list(); |
b5541356 | 4100 | |
5eb91c98 DG |
4101 | /* Set up max poll set size */ |
4102 | lttng_poll_set_max_size(); | |
4103 | ||
2f77fc4b | 4104 | cmd_init(); |
00e2e675 | 4105 | |
ae9e45b3 DG |
4106 | /* Check for the application socket timeout env variable. */ |
4107 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4108 | if (env_app_timeout) { | |
4109 | app_socket_timeout = atoi(env_app_timeout); | |
4110 | } else { | |
4111 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4112 | } | |
4113 | ||
44a5e5eb DG |
4114 | /* Create thread to manage the client socket */ |
4115 | ret = pthread_create(&health_thread, NULL, | |
4116 | thread_manage_health, (void *) NULL); | |
4117 | if (ret != 0) { | |
4118 | PERROR("pthread_create health"); | |
4119 | goto exit_health; | |
4120 | } | |
4121 | ||
cf3af59e | 4122 | /* Create thread to manage the client socket */ |
099e26bd DG |
4123 | ret = pthread_create(&client_thread, NULL, |
4124 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4125 | if (ret != 0) { |
76d7553f | 4126 | PERROR("pthread_create clients"); |
cf3af59e MD |
4127 | goto exit_client; |
4128 | } | |
fac6795d | 4129 | |
099e26bd DG |
4130 | /* Create thread to dispatch registration */ |
4131 | ret = pthread_create(&dispatch_thread, NULL, | |
4132 | thread_dispatch_ust_registration, (void *) NULL); | |
4133 | if (ret != 0) { | |
76d7553f | 4134 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4135 | goto exit_dispatch; |
4136 | } | |
4137 | ||
4138 | /* Create thread to manage application registration. */ | |
4139 | ret = pthread_create(®_apps_thread, NULL, | |
4140 | thread_registration_apps, (void *) NULL); | |
4141 | if (ret != 0) { | |
76d7553f | 4142 | PERROR("pthread_create registration"); |
099e26bd DG |
4143 | goto exit_reg_apps; |
4144 | } | |
4145 | ||
cf3af59e | 4146 | /* Create thread to manage application socket */ |
54d01ffb DG |
4147 | ret = pthread_create(&apps_thread, NULL, |
4148 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4149 | if (ret != 0) { |
76d7553f | 4150 | PERROR("pthread_create apps"); |
cf3af59e MD |
4151 | goto exit_apps; |
4152 | } | |
fac6795d | 4153 | |
6620da75 DG |
4154 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4155 | if (is_root && !opt_no_kernel) { | |
4156 | /* Create kernel thread to manage kernel event */ | |
4157 | ret = pthread_create(&kernel_thread, NULL, | |
4158 | thread_manage_kernel, (void *) NULL); | |
4159 | if (ret != 0) { | |
4160 | PERROR("pthread_create kernel"); | |
4161 | goto exit_kernel; | |
4162 | } | |
7a485870 | 4163 | |
6620da75 DG |
4164 | ret = pthread_join(kernel_thread, &status); |
4165 | if (ret != 0) { | |
4166 | PERROR("pthread_join"); | |
4167 | goto error; /* join error, exit without cleanup */ | |
4168 | } | |
fac6795d DG |
4169 | } |
4170 | ||
cf3af59e MD |
4171 | exit_kernel: |
4172 | ret = pthread_join(apps_thread, &status); | |
4173 | if (ret != 0) { | |
76d7553f | 4174 | PERROR("pthread_join"); |
cf3af59e MD |
4175 | goto error; /* join error, exit without cleanup */ |
4176 | } | |
fac6795d | 4177 | |
cf3af59e | 4178 | exit_apps: |
099e26bd DG |
4179 | ret = pthread_join(reg_apps_thread, &status); |
4180 | if (ret != 0) { | |
76d7553f | 4181 | PERROR("pthread_join"); |
099e26bd DG |
4182 | goto error; /* join error, exit without cleanup */ |
4183 | } | |
4184 | ||
4185 | exit_reg_apps: | |
4186 | ret = pthread_join(dispatch_thread, &status); | |
4187 | if (ret != 0) { | |
76d7553f | 4188 | PERROR("pthread_join"); |
099e26bd DG |
4189 | goto error; /* join error, exit without cleanup */ |
4190 | } | |
4191 | ||
4192 | exit_dispatch: | |
cf3af59e MD |
4193 | ret = pthread_join(client_thread, &status); |
4194 | if (ret != 0) { | |
76d7553f | 4195 | PERROR("pthread_join"); |
cf3af59e MD |
4196 | goto error; /* join error, exit without cleanup */ |
4197 | } | |
4198 | ||
3bd1e081 | 4199 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4200 | if (ret != 0) { |
76d7553f | 4201 | PERROR("join_consumer"); |
cf3af59e MD |
4202 | goto error; /* join error, exit without cleanup */ |
4203 | } | |
a88df331 | 4204 | |
06f525de DG |
4205 | ret = join_consumer_thread(&ustconsumer32_data); |
4206 | if (ret != 0) { | |
4207 | PERROR("join_consumer ust32"); | |
4208 | goto error; /* join error, exit without cleanup */ | |
4209 | } | |
4210 | ||
4211 | ret = join_consumer_thread(&ustconsumer64_data); | |
4212 | if (ret != 0) { | |
4213 | PERROR("join_consumer ust64"); | |
4214 | goto error; /* join error, exit without cleanup */ | |
4215 | } | |
4216 | ||
cf3af59e | 4217 | exit_client: |
06f525de DG |
4218 | ret = pthread_join(health_thread, &status); |
4219 | if (ret != 0) { | |
4220 | PERROR("pthread_join health thread"); | |
4221 | goto error; /* join error, exit without cleanup */ | |
4222 | } | |
4223 | ||
44a5e5eb | 4224 | exit_health: |
a88df331 | 4225 | exit: |
cf3af59e MD |
4226 | /* |
4227 | * cleanup() is called when no other thread is running. | |
4228 | */ | |
f6a9efaa | 4229 | rcu_thread_online(); |
cf3af59e | 4230 | cleanup(); |
f6a9efaa DG |
4231 | rcu_thread_offline(); |
4232 | rcu_unregister_thread(); | |
67e40797 | 4233 | if (!ret) { |
cf3af59e | 4234 | exit(EXIT_SUCCESS); |
67e40797 | 4235 | } |
cf3af59e | 4236 | error: |
5e16da05 | 4237 | exit(EXIT_FAILURE); |
fac6795d | 4238 | } |