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 | ||
9449cc75 DG |
858 | /* |
859 | * Since the consumer thread can be spawned at any moment in time, we init | |
860 | * the health to a poll status (1, which is a valid health over time). | |
861 | * When the thread starts, we update here the health to a "code" path being | |
862 | * an even value so this thread, when reaching a poll wait, does not | |
863 | * trigger an error with an even value. | |
864 | * | |
865 | * Here is the use case we avoid. | |
866 | * | |
867 | * +1: the first poll update during initialization (main()) | |
868 | * +2 * x: multiple code update once in this thread. | |
869 | * +1: poll wait in this thread (being a good health state). | |
870 | * == even number which after the wait period shows as a bad health. | |
871 | * | |
872 | * In a nutshell, the following poll update to the health state brings back | |
873 | * the state to an even value meaning a code path. | |
874 | */ | |
227e824a | 875 | health_poll_update(); |
9449cc75 | 876 | |
5eb91c98 DG |
877 | /* |
878 | * Pass 2 as size here for the thread quit pipe and kconsumerd_err_sock. | |
879 | * Nothing more will be added to this poll set. | |
880 | */ | |
881 | ret = create_thread_poll_set(&events, 2); | |
882 | if (ret < 0) { | |
76d7553f | 883 | goto error_poll; |
5eb91c98 | 884 | } |
273ea72c | 885 | |
edb8b045 DG |
886 | /* |
887 | * The error socket here is already in a listening state which was done | |
888 | * just before spawning this thread to avoid a race between the consumer | |
889 | * daemon exec trying to connect and the listen() call. | |
890 | */ | |
3bd1e081 | 891 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
892 | if (ret < 0) { |
893 | goto error; | |
894 | } | |
895 | ||
227e824a | 896 | health_code_update(); |
44a5e5eb | 897 | |
273ea72c | 898 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 899 | restart: |
227e824a | 900 | health_poll_update(); |
8ac94142 | 901 | |
6993eeb3 CB |
902 | if (testpoint(thread_manage_consumer)) { |
903 | goto error; | |
904 | } | |
8ac94142 | 905 | |
5eb91c98 | 906 | ret = lttng_poll_wait(&events, -1); |
227e824a | 907 | health_poll_update(); |
273ea72c | 908 | if (ret < 0) { |
88f2b785 MD |
909 | /* |
910 | * Restart interrupted system call. | |
911 | */ | |
912 | if (errno == EINTR) { | |
913 | goto restart; | |
914 | } | |
273ea72c DG |
915 | goto error; |
916 | } | |
917 | ||
0d9c5d77 DG |
918 | nb_fd = ret; |
919 | ||
5eb91c98 DG |
920 | for (i = 0; i < nb_fd; i++) { |
921 | /* Fetch once the poll data */ | |
922 | revents = LTTNG_POLL_GETEV(&events, i); | |
923 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
924 | ||
227e824a | 925 | health_code_update(); |
44a5e5eb | 926 | |
5eb91c98 DG |
927 | /* Thread quit pipe has been closed. Killing thread. */ |
928 | ret = check_thread_quit_pipe(pollfd, revents); | |
929 | if (ret) { | |
139ac872 MD |
930 | err = 0; |
931 | goto exit; | |
5eb91c98 DG |
932 | } |
933 | ||
934 | /* Event on the registration socket */ | |
3bd1e081 | 935 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 936 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 937 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
938 | goto error; |
939 | } | |
940 | } | |
273ea72c DG |
941 | } |
942 | ||
3bd1e081 | 943 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
944 | if (sock < 0) { |
945 | goto error; | |
946 | } | |
947 | ||
b662582b DG |
948 | /* |
949 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
950 | * show must go on. | |
951 | */ | |
952 | (void) utils_set_fd_cloexec(sock); | |
953 | ||
227e824a | 954 | health_code_update(); |
44a5e5eb | 955 | |
3bd1e081 | 956 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 957 | |
712ea556 | 958 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
959 | ret = lttcomm_recv_unix_sock(sock, &code, |
960 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
961 | if (ret <= 0) { |
962 | goto error; | |
963 | } | |
964 | ||
227e824a | 965 | health_code_update(); |
44a5e5eb | 966 | |
f73fabfd | 967 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 MD |
968 | consumer_data->cmd_sock = |
969 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
970 | if (consumer_data->cmd_sock < 0) { | |
a23ec3a7 DG |
971 | /* On error, signal condition and quit. */ |
972 | signal_consumer_condition(consumer_data, -1); | |
48842b30 | 973 | PERROR("consumer connect"); |
1d4b027a DG |
974 | goto error; |
975 | } | |
a23ec3a7 DG |
976 | signal_consumer_condition(consumer_data, 1); |
977 | DBG("Consumer command socket ready"); | |
1d4b027a | 978 | } else { |
3bd1e081 | 979 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
980 | lttcomm_get_readable_code(-code)); |
981 | goto error; | |
982 | } | |
983 | ||
54d01ffb | 984 | /* Remove the kconsumerd error sock since we've established a connexion */ |
3bd1e081 | 985 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 986 | if (ret < 0) { |
72079cae DG |
987 | goto error; |
988 | } | |
989 | ||
5eb91c98 DG |
990 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
991 | if (ret < 0) { | |
72079cae | 992 | goto error; |
5eb91c98 DG |
993 | } |
994 | ||
227e824a | 995 | health_code_update(); |
44a5e5eb | 996 | |
5eb91c98 | 997 | /* Inifinite blocking call, waiting for transmission */ |
88f2b785 | 998 | restart_poll: |
227e824a | 999 | health_poll_update(); |
5eb91c98 | 1000 | ret = lttng_poll_wait(&events, -1); |
227e824a | 1001 | health_poll_update(); |
5eb91c98 | 1002 | if (ret < 0) { |
88f2b785 MD |
1003 | /* |
1004 | * Restart interrupted system call. | |
1005 | */ | |
1006 | if (errno == EINTR) { | |
1007 | goto restart_poll; | |
1008 | } | |
72079cae DG |
1009 | goto error; |
1010 | } | |
1011 | ||
0d9c5d77 DG |
1012 | nb_fd = ret; |
1013 | ||
5eb91c98 DG |
1014 | for (i = 0; i < nb_fd; i++) { |
1015 | /* Fetch once the poll data */ | |
1016 | revents = LTTNG_POLL_GETEV(&events, i); | |
1017 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1018 | ||
227e824a | 1019 | health_code_update(); |
44a5e5eb | 1020 | |
5eb91c98 DG |
1021 | /* Thread quit pipe has been closed. Killing thread. */ |
1022 | ret = check_thread_quit_pipe(pollfd, revents); | |
1023 | if (ret) { | |
139ac872 MD |
1024 | err = 0; |
1025 | goto exit; | |
5eb91c98 DG |
1026 | } |
1027 | ||
1028 | /* Event on the kconsumerd socket */ | |
1029 | if (pollfd == sock) { | |
1030 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1031 | ERR("consumer err socket second poll error"); |
5eb91c98 DG |
1032 | goto error; |
1033 | } | |
1034 | } | |
1035 | } | |
1036 | ||
227e824a | 1037 | health_code_update(); |
44a5e5eb | 1038 | |
712ea556 | 1039 | /* Wait for any kconsumerd error */ |
54d01ffb DG |
1040 | ret = lttcomm_recv_unix_sock(sock, &code, |
1041 | sizeof(enum lttcomm_return_code)); | |
712ea556 | 1042 | if (ret <= 0) { |
3bd1e081 | 1043 | ERR("consumer closed the command socket"); |
712ea556 | 1044 | goto error; |
6f61d021 | 1045 | } |
1d4b027a | 1046 | |
3bd1e081 | 1047 | ERR("consumer return code : %s", lttcomm_get_readable_code(-code)); |
712ea556 | 1048 | |
139ac872 | 1049 | exit: |
1d4b027a | 1050 | error: |
5c827ce0 DG |
1051 | /* Immediately set the consumerd state to stopped */ |
1052 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1053 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1054 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1055 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1056 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1057 | } else { | |
1058 | /* Code flow error... */ | |
1059 | assert(0); | |
1060 | } | |
1061 | ||
76d7553f MD |
1062 | if (consumer_data->err_sock >= 0) { |
1063 | ret = close(consumer_data->err_sock); | |
1064 | if (ret) { | |
1065 | PERROR("close"); | |
1066 | } | |
1067 | } | |
1068 | if (consumer_data->cmd_sock >= 0) { | |
1069 | ret = close(consumer_data->cmd_sock); | |
1070 | if (ret) { | |
1071 | PERROR("close"); | |
1072 | } | |
1073 | } | |
1074 | if (sock >= 0) { | |
1075 | ret = close(sock); | |
1076 | if (ret) { | |
1077 | PERROR("close"); | |
1078 | } | |
1079 | } | |
273ea72c | 1080 | |
3bd1e081 MD |
1081 | unlink(consumer_data->err_unix_sock_path); |
1082 | unlink(consumer_data->cmd_unix_sock_path); | |
1083 | consumer_data->pid = 0; | |
1d4b027a | 1084 | |
5eb91c98 | 1085 | lttng_poll_clean(&events); |
76d7553f | 1086 | error_poll: |
139ac872 | 1087 | if (err) { |
227e824a | 1088 | health_error(); |
139ac872 MD |
1089 | ERR("Health error occurred in %s", __func__); |
1090 | } | |
769b7d7e | 1091 | health_unregister(); |
76d7553f | 1092 | DBG("consumer thread cleanup completed"); |
0177d773 | 1093 | |
5eb91c98 | 1094 | return NULL; |
099e26bd DG |
1095 | } |
1096 | ||
099e26bd DG |
1097 | /* |
1098 | * This thread manage application communication. | |
1d4b027a DG |
1099 | */ |
1100 | static void *thread_manage_apps(void *data) | |
099e26bd | 1101 | { |
139ac872 | 1102 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1103 | uint32_t revents, nb_fd; |
099e26bd | 1104 | struct ust_command ust_cmd; |
5eb91c98 | 1105 | struct lttng_poll_event events; |
099e26bd DG |
1106 | |
1107 | DBG("[thread] Manage application started"); | |
1108 | ||
f6a9efaa DG |
1109 | rcu_register_thread(); |
1110 | rcu_thread_online(); | |
1111 | ||
769b7d7e DG |
1112 | health_register(HEALTH_TYPE_APP_MANAGE); |
1113 | ||
6993eeb3 CB |
1114 | if (testpoint(thread_manage_apps)) { |
1115 | goto error_testpoint; | |
1116 | } | |
1117 | ||
227e824a | 1118 | health_code_update(); |
44a5e5eb | 1119 | |
5eb91c98 DG |
1120 | ret = create_thread_poll_set(&events, 2); |
1121 | if (ret < 0) { | |
76d7553f | 1122 | goto error_poll_create; |
5eb91c98 | 1123 | } |
099e26bd | 1124 | |
5eb91c98 DG |
1125 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1126 | if (ret < 0) { | |
1127 | goto error; | |
1128 | } | |
099e26bd | 1129 | |
6993eeb3 CB |
1130 | if (testpoint(thread_manage_apps_before_loop)) { |
1131 | goto error; | |
1132 | } | |
8ac94142 | 1133 | |
227e824a | 1134 | health_code_update(); |
44a5e5eb | 1135 | |
5eb91c98 | 1136 | while (1) { |
d21b0d71 | 1137 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1138 | |
1139 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1140 | restart: |
227e824a | 1141 | health_poll_update(); |
5eb91c98 | 1142 | ret = lttng_poll_wait(&events, -1); |
227e824a | 1143 | health_poll_update(); |
099e26bd | 1144 | if (ret < 0) { |
88f2b785 MD |
1145 | /* |
1146 | * Restart interrupted system call. | |
1147 | */ | |
1148 | if (errno == EINTR) { | |
1149 | goto restart; | |
1150 | } | |
099e26bd DG |
1151 | goto error; |
1152 | } | |
1153 | ||
0d9c5d77 DG |
1154 | nb_fd = ret; |
1155 | ||
5eb91c98 DG |
1156 | for (i = 0; i < nb_fd; i++) { |
1157 | /* Fetch once the poll data */ | |
1158 | revents = LTTNG_POLL_GETEV(&events, i); | |
1159 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1160 | ||
227e824a | 1161 | health_code_update(); |
44a5e5eb | 1162 | |
5eb91c98 DG |
1163 | /* Thread quit pipe has been closed. Killing thread. */ |
1164 | ret = check_thread_quit_pipe(pollfd, revents); | |
1165 | if (ret) { | |
139ac872 MD |
1166 | err = 0; |
1167 | goto exit; | |
5eb91c98 | 1168 | } |
099e26bd | 1169 | |
5eb91c98 DG |
1170 | /* Inspect the apps cmd pipe */ |
1171 | if (pollfd == apps_cmd_pipe[0]) { | |
1172 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1173 | ERR("Apps command pipe error"); | |
0177d773 | 1174 | goto error; |
5eb91c98 DG |
1175 | } else if (revents & LPOLLIN) { |
1176 | /* Empty pipe */ | |
f921c78f DG |
1177 | do { |
1178 | ret = read(apps_cmd_pipe[0], &ust_cmd, sizeof(ust_cmd)); | |
1179 | } while (ret < 0 && errno == EINTR); | |
5eb91c98 | 1180 | if (ret < 0 || ret < sizeof(ust_cmd)) { |
76d7553f | 1181 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1182 | goto error; |
1183 | } | |
099e26bd | 1184 | |
227e824a | 1185 | health_code_update(); |
44a5e5eb | 1186 | |
5eb91c98 | 1187 | /* Register applicaton to the session daemon */ |
56fff090 | 1188 | ret = ust_app_register(&ust_cmd.reg_msg, |
54d01ffb | 1189 | ust_cmd.sock); |
88ff5b7f | 1190 | if (ret == -ENOMEM) { |
5eb91c98 | 1191 | goto error; |
88ff5b7f MD |
1192 | } else if (ret < 0) { |
1193 | break; | |
5eb91c98 DG |
1194 | } |
1195 | ||
227e824a | 1196 | health_code_update(); |
44a5e5eb | 1197 | |
acc7b41b | 1198 | /* |
e0c7ec2b | 1199 | * Validate UST version compatibility. |
acc7b41b | 1200 | */ |
e0c7ec2b DG |
1201 | ret = ust_app_validate_version(ust_cmd.sock); |
1202 | if (ret >= 0) { | |
1203 | /* | |
1204 | * Add channel(s) and event(s) to newly registered apps | |
1205 | * from lttng global UST domain. | |
1206 | */ | |
1207 | update_ust_app(ust_cmd.sock); | |
1208 | } | |
acc7b41b | 1209 | |
227e824a | 1210 | health_code_update(); |
44a5e5eb | 1211 | |
f2ca2e25 | 1212 | ret = ust_app_register_done(ust_cmd.sock); |
5eb91c98 DG |
1213 | if (ret < 0) { |
1214 | /* | |
1215 | * If the registration is not possible, we simply | |
1216 | * unregister the apps and continue | |
1217 | */ | |
56fff090 | 1218 | ust_app_unregister(ust_cmd.sock); |
5eb91c98 DG |
1219 | } else { |
1220 | /* | |
622c9ecf DG |
1221 | * We only monitor the error events of the socket. This |
1222 | * thread does not handle any incoming data from UST | |
1223 | * (POLLIN). | |
5eb91c98 | 1224 | */ |
622c9ecf DG |
1225 | ret = lttng_poll_add(&events, ust_cmd.sock, |
1226 | LPOLLERR & LPOLLHUP & LPOLLRDHUP); | |
5eb91c98 DG |
1227 | if (ret < 0) { |
1228 | goto error; | |
1229 | } | |
1230 | ||
ae9e45b3 DG |
1231 | /* Set socket timeout for both receiving and ending */ |
1232 | (void) lttcomm_setsockopt_rcv_timeout(ust_cmd.sock, | |
1233 | app_socket_timeout); | |
1234 | (void) lttcomm_setsockopt_snd_timeout(ust_cmd.sock, | |
1235 | app_socket_timeout); | |
1236 | ||
54d01ffb DG |
1237 | DBG("Apps with sock %d added to poll set", |
1238 | ust_cmd.sock); | |
5eb91c98 | 1239 | } |
487cf67c | 1240 | |
227e824a | 1241 | health_code_update(); |
44a5e5eb | 1242 | |
5eb91c98 | 1243 | break; |
0177d773 | 1244 | } |
5eb91c98 DG |
1245 | } else { |
1246 | /* | |
54d01ffb DG |
1247 | * At this point, we know that a registered application made |
1248 | * the event at poll_wait. | |
5eb91c98 DG |
1249 | */ |
1250 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1251 | /* Removing from the poll set */ | |
1252 | ret = lttng_poll_del(&events, pollfd); | |
1253 | if (ret < 0) { | |
1254 | goto error; | |
1255 | } | |
099e26bd | 1256 | |
b9d9b220 | 1257 | /* Socket closed on remote end. */ |
56fff090 | 1258 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1259 | break; |
1260 | } | |
099e26bd | 1261 | } |
44a5e5eb | 1262 | |
227e824a | 1263 | health_code_update(); |
099e26bd | 1264 | } |
099e26bd DG |
1265 | } |
1266 | ||
139ac872 | 1267 | exit: |
099e26bd | 1268 | error: |
5eb91c98 | 1269 | lttng_poll_clean(&events); |
76d7553f | 1270 | error_poll_create: |
6993eeb3 | 1271 | error_testpoint: |
6620da75 DG |
1272 | utils_close_pipe(apps_cmd_pipe); |
1273 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1274 | ||
1275 | /* | |
1276 | * We don't clean the UST app hash table here since already registered | |
1277 | * applications can still be controlled so let them be until the session | |
1278 | * daemon dies or the applications stop. | |
1279 | */ | |
1280 | ||
139ac872 | 1281 | if (err) { |
227e824a | 1282 | health_error(); |
139ac872 MD |
1283 | ERR("Health error occurred in %s", __func__); |
1284 | } | |
769b7d7e | 1285 | health_unregister(); |
76d7553f | 1286 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1287 | rcu_thread_offline(); |
1288 | rcu_unregister_thread(); | |
099e26bd DG |
1289 | return NULL; |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Dispatch request from the registration threads to the application | |
1294 | * communication thread. | |
1295 | */ | |
1296 | static void *thread_dispatch_ust_registration(void *data) | |
1297 | { | |
1298 | int ret; | |
1299 | struct cds_wfq_node *node; | |
1300 | struct ust_command *ust_cmd = NULL; | |
1301 | ||
1302 | DBG("[thread] Dispatch UST command started"); | |
1303 | ||
26c9d55e | 1304 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
099e26bd DG |
1305 | /* Atomically prepare the queue futex */ |
1306 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1307 | ||
1308 | do { | |
1309 | /* Dequeue command for registration */ | |
1310 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1311 | if (node == NULL) { | |
00a17c97 | 1312 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1313 | /* Continue thread execution */ |
1314 | break; | |
1315 | } | |
1316 | ||
1317 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1318 | ||
2f50c8a3 DG |
1319 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1320 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1321 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1322 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1323 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1324 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
099e26bd DG |
1325 | /* |
1326 | * Inform apps thread of the new application registration. This | |
1327 | * call is blocking so we can be assured that the data will be read | |
1328 | * at some point in time or wait to the end of the world :) | |
1329 | */ | |
6620da75 | 1330 | if (apps_cmd_pipe[1] >= 0) { |
fbb3b395 DG |
1331 | do { |
1332 | ret = write(apps_cmd_pipe[1], ust_cmd, | |
1333 | sizeof(struct ust_command)); | |
1334 | } while (ret < 0 && errno == EINTR); | |
4cec016f | 1335 | if (ret < 0 || ret != sizeof(struct ust_command)) { |
6620da75 DG |
1336 | PERROR("write apps cmd pipe"); |
1337 | if (errno == EBADF) { | |
1338 | /* | |
1339 | * We can't inform the application thread to process | |
1340 | * registration. We will exit or else application | |
1341 | * registration will not occur and tracing will never | |
1342 | * start. | |
1343 | */ | |
1344 | goto error; | |
1345 | } | |
1346 | } | |
1347 | } else { | |
1348 | /* Application manager thread is not available. */ | |
1349 | ret = close(ust_cmd->sock); | |
1350 | if (ret < 0) { | |
1351 | PERROR("close ust_cmd sock"); | |
099e26bd DG |
1352 | } |
1353 | } | |
1354 | free(ust_cmd); | |
1355 | } while (node != NULL); | |
1356 | ||
1357 | /* Futex wait on queue. Blocking call on futex() */ | |
1358 | futex_nto1_wait(&ust_cmd_queue.futex); | |
1359 | } | |
1360 | ||
1361 | error: | |
1362 | DBG("Dispatch thread dying"); | |
1363 | return NULL; | |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | * This thread manage application registration. | |
1368 | */ | |
1369 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1370 | { |
139ac872 | 1371 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1372 | uint32_t revents, nb_fd; |
1373 | struct lttng_poll_event events; | |
099e26bd DG |
1374 | /* |
1375 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1376 | * freed in the manage apps thread. | |
1377 | */ | |
1378 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1379 | |
099e26bd | 1380 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1381 | |
769b7d7e DG |
1382 | health_register(HEALTH_TYPE_APP_REG); |
1383 | ||
6993eeb3 CB |
1384 | if (testpoint(thread_registration_apps)) { |
1385 | goto error_testpoint; | |
1386 | } | |
8ac94142 | 1387 | |
1d4b027a DG |
1388 | ret = lttcomm_listen_unix_sock(apps_sock); |
1389 | if (ret < 0) { | |
76d7553f | 1390 | goto error_listen; |
1d4b027a DG |
1391 | } |
1392 | ||
5eb91c98 DG |
1393 | /* |
1394 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1395 | * more will be added to this poll set. | |
1396 | */ | |
1397 | ret = create_thread_poll_set(&events, 2); | |
1398 | if (ret < 0) { | |
76d7553f | 1399 | goto error_create_poll; |
5eb91c98 | 1400 | } |
273ea72c | 1401 | |
5eb91c98 DG |
1402 | /* Add the application registration socket */ |
1403 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1404 | if (ret < 0) { | |
76d7553f | 1405 | goto error_poll_add; |
5eb91c98 | 1406 | } |
273ea72c | 1407 | |
1d4b027a | 1408 | /* Notify all applications to register */ |
0fdd1e2c DG |
1409 | ret = notify_ust_apps(1); |
1410 | if (ret < 0) { | |
1411 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1412 | "Execution continues but there might be problem for already\n" |
1413 | "running applications that wishes to register."); | |
0fdd1e2c | 1414 | } |
1d4b027a DG |
1415 | |
1416 | while (1) { | |
1417 | DBG("Accepting application registration"); | |
273ea72c DG |
1418 | |
1419 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1420 | restart: |
227e824a | 1421 | health_poll_update(); |
5eb91c98 | 1422 | ret = lttng_poll_wait(&events, -1); |
227e824a | 1423 | health_poll_update(); |
273ea72c | 1424 | if (ret < 0) { |
88f2b785 MD |
1425 | /* |
1426 | * Restart interrupted system call. | |
1427 | */ | |
1428 | if (errno == EINTR) { | |
1429 | goto restart; | |
1430 | } | |
273ea72c DG |
1431 | goto error; |
1432 | } | |
1433 | ||
0d9c5d77 DG |
1434 | nb_fd = ret; |
1435 | ||
5eb91c98 | 1436 | for (i = 0; i < nb_fd; i++) { |
227e824a | 1437 | health_code_update(); |
139ac872 | 1438 | |
5eb91c98 DG |
1439 | /* Fetch once the poll data */ |
1440 | revents = LTTNG_POLL_GETEV(&events, i); | |
1441 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1442 | |
5eb91c98 DG |
1443 | /* Thread quit pipe has been closed. Killing thread. */ |
1444 | ret = check_thread_quit_pipe(pollfd, revents); | |
1445 | if (ret) { | |
139ac872 MD |
1446 | err = 0; |
1447 | goto exit; | |
90014c57 | 1448 | } |
1d4b027a | 1449 | |
5eb91c98 DG |
1450 | /* Event on the registration socket */ |
1451 | if (pollfd == apps_sock) { | |
1452 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1453 | ERR("Register apps socket poll error"); | |
1454 | goto error; | |
1455 | } else if (revents & LPOLLIN) { | |
1456 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1457 | if (sock < 0) { | |
1458 | goto error; | |
1459 | } | |
099e26bd | 1460 | |
b662582b DG |
1461 | /* |
1462 | * Set the CLOEXEC flag. Return code is useless because | |
1463 | * either way, the show must go on. | |
1464 | */ | |
1465 | (void) utils_set_fd_cloexec(sock); | |
1466 | ||
5eb91c98 | 1467 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1468 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1469 | if (ust_cmd == NULL) { |
76d7553f | 1470 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1471 | goto error; |
1472 | } | |
1d4b027a | 1473 | |
5eb91c98 DG |
1474 | /* |
1475 | * Using message-based transmissions to ensure we don't | |
1476 | * have to deal with partially received messages. | |
1477 | */ | |
4063050c MD |
1478 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1479 | if (ret < 0) { | |
1480 | ERR("Exhausted file descriptors allowed for applications."); | |
1481 | free(ust_cmd); | |
1482 | ret = close(sock); | |
1483 | if (ret) { | |
1484 | PERROR("close"); | |
1485 | } | |
1486 | sock = -1; | |
1487 | continue; | |
1488 | } | |
227e824a | 1489 | health_code_update(); |
5eb91c98 DG |
1490 | ret = lttcomm_recv_unix_sock(sock, &ust_cmd->reg_msg, |
1491 | sizeof(struct ust_register_msg)); | |
1492 | if (ret < 0 || ret < sizeof(struct ust_register_msg)) { | |
1493 | if (ret < 0) { | |
76d7553f | 1494 | PERROR("lttcomm_recv_unix_sock register apps"); |
5eb91c98 DG |
1495 | } else { |
1496 | ERR("Wrong size received on apps register"); | |
1497 | } | |
1498 | free(ust_cmd); | |
76d7553f MD |
1499 | ret = close(sock); |
1500 | if (ret) { | |
1501 | PERROR("close"); | |
1502 | } | |
4063050c | 1503 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1504 | sock = -1; |
5eb91c98 DG |
1505 | continue; |
1506 | } | |
227e824a | 1507 | health_code_update(); |
099e26bd | 1508 | |
5eb91c98 | 1509 | ust_cmd->sock = sock; |
34a2494f | 1510 | sock = -1; |
099e26bd | 1511 | |
5eb91c98 DG |
1512 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1513 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1514 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1515 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1516 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1517 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1518 | |
5eb91c98 DG |
1519 | /* |
1520 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1521 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1522 | */ |
1523 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1524 | ||
1525 | /* | |
1526 | * Wake the registration queue futex. Implicit memory | |
1527 | * barrier with the exchange in cds_wfq_enqueue. | |
1528 | */ | |
1529 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1530 | } | |
1531 | } | |
90014c57 | 1532 | } |
1d4b027a DG |
1533 | } |
1534 | ||
139ac872 | 1535 | exit: |
1d4b027a | 1536 | error: |
139ac872 | 1537 | if (err) { |
227e824a | 1538 | health_error(); |
139ac872 MD |
1539 | ERR("Health error occurred in %s", __func__); |
1540 | } | |
139ac872 | 1541 | |
0fdd1e2c DG |
1542 | /* Notify that the registration thread is gone */ |
1543 | notify_ust_apps(0); | |
1544 | ||
a4b35e07 | 1545 | if (apps_sock >= 0) { |
76d7553f MD |
1546 | ret = close(apps_sock); |
1547 | if (ret) { | |
1548 | PERROR("close"); | |
1549 | } | |
a4b35e07 | 1550 | } |
46c3f085 | 1551 | if (sock >= 0) { |
76d7553f MD |
1552 | ret = close(sock); |
1553 | if (ret) { | |
1554 | PERROR("close"); | |
1555 | } | |
4063050c | 1556 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1557 | } |
273ea72c | 1558 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1559 | |
76d7553f | 1560 | error_poll_add: |
5eb91c98 | 1561 | lttng_poll_clean(&events); |
76d7553f MD |
1562 | error_listen: |
1563 | error_create_poll: | |
6993eeb3 | 1564 | error_testpoint: |
76d7553f | 1565 | DBG("UST Registration thread cleanup complete"); |
769b7d7e | 1566 | health_unregister(); |
5eb91c98 | 1567 | |
1d4b027a DG |
1568 | return NULL; |
1569 | } | |
1570 | ||
8c0faa1d | 1571 | /* |
3bd1e081 | 1572 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1573 | * exec or it will fails. |
8c0faa1d | 1574 | */ |
3bd1e081 | 1575 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1576 | { |
a23ec3a7 | 1577 | int ret, clock_ret; |
ee0b0061 DG |
1578 | struct timespec timeout; |
1579 | ||
a23ec3a7 DG |
1580 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1581 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1582 | |
a23ec3a7 DG |
1583 | /* Setup pthread condition */ |
1584 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1585 | if (ret != 0) { | |
1586 | errno = ret; | |
1587 | PERROR("pthread_condattr_init consumer data"); | |
1588 | goto error; | |
1589 | } | |
1590 | ||
1591 | /* | |
1592 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1593 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1594 | * for a more details and how we noticed it. | |
1595 | */ | |
1596 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1597 | if (ret != 0) { | |
1598 | errno = ret; | |
1599 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1600 | goto error; |
1601 | } | |
8c0faa1d | 1602 | |
a23ec3a7 DG |
1603 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1604 | if (ret != 0) { | |
1605 | errno = ret; | |
1606 | PERROR("pthread_cond_init consumer data"); | |
1607 | goto error; | |
1608 | } | |
1609 | ||
1610 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1611 | consumer_data); | |
8c0faa1d | 1612 | if (ret != 0) { |
3bd1e081 | 1613 | PERROR("pthread_create consumer"); |
ee0b0061 | 1614 | ret = -1; |
8c0faa1d DG |
1615 | goto error; |
1616 | } | |
1617 | ||
a23ec3a7 DG |
1618 | /* We are about to wait on a pthread condition */ |
1619 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
1620 | ||
ee0b0061 | 1621 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
1622 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
1623 | /* | |
1624 | * Set the timeout for the condition timed wait even if the clock gettime | |
1625 | * call fails since we might loop on that call and we want to avoid to | |
1626 | * increment the timeout too many times. | |
1627 | */ | |
1628 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
1629 | ||
1630 | /* | |
1631 | * The following loop COULD be skipped in some conditions so this is why we | |
1632 | * set ret to 0 in order to make sure at least one round of the loop is | |
1633 | * done. | |
1634 | */ | |
1635 | ret = 0; | |
1636 | ||
1637 | /* | |
1638 | * Loop until the condition is reached or when a timeout is reached. Note | |
1639 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
1640 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
1641 | * possible. This loop does not take any chances and works with both of | |
1642 | * them. | |
1643 | */ | |
1644 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
1645 | if (clock_ret < 0) { | |
1646 | PERROR("clock_gettime spawn consumer"); | |
1647 | /* Infinite wait for the consumerd thread to be ready */ | |
1648 | ret = pthread_cond_wait(&consumer_data->cond, | |
1649 | &consumer_data->cond_mutex); | |
1650 | } else { | |
1651 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
1652 | &consumer_data->cond_mutex, &timeout); | |
1653 | } | |
ee0b0061 | 1654 | } |
8c0faa1d | 1655 | |
a23ec3a7 DG |
1656 | /* Release the pthread condition */ |
1657 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
1658 | ||
1659 | if (ret != 0) { | |
1660 | errno = ret; | |
1661 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
1662 | /* |
1663 | * Call has timed out so we kill the kconsumerd_thread and return | |
1664 | * an error. | |
1665 | */ | |
a23ec3a7 DG |
1666 | ERR("Condition timed out. The consumer thread was never ready." |
1667 | " Killing it"); | |
3bd1e081 | 1668 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 1669 | if (ret < 0) { |
3bd1e081 | 1670 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
1671 | } |
1672 | } else { | |
a23ec3a7 | 1673 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
1674 | } |
1675 | goto error; | |
1676 | } | |
1677 | ||
3bd1e081 MD |
1678 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1679 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 1680 | ERR("Consumerd did not start"); |
3bd1e081 | 1681 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
1682 | goto error; |
1683 | } | |
3bd1e081 | 1684 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 1685 | |
8c0faa1d DG |
1686 | return 0; |
1687 | ||
1688 | error: | |
1689 | return ret; | |
1690 | } | |
1691 | ||
d9800920 | 1692 | /* |
3bd1e081 | 1693 | * Join consumer thread |
d9800920 | 1694 | */ |
3bd1e081 | 1695 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
1696 | { |
1697 | void *status; | |
cf3af59e | 1698 | |
e8209f6b DG |
1699 | /* Consumer pid must be a real one. */ |
1700 | if (consumer_data->pid > 0) { | |
c617c0c6 | 1701 | int ret; |
3bd1e081 | 1702 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 1703 | if (ret) { |
3bd1e081 | 1704 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
1705 | return ret; |
1706 | } | |
3bd1e081 | 1707 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
1708 | } else { |
1709 | return 0; | |
1710 | } | |
1711 | } | |
1712 | ||
8c0faa1d | 1713 | /* |
3bd1e081 | 1714 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 1715 | * |
d063d709 | 1716 | * Return pid if successful else -1. |
8c0faa1d | 1717 | */ |
3bd1e081 | 1718 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
1719 | { |
1720 | int ret; | |
1721 | pid_t pid; | |
94c55f17 | 1722 | const char *consumer_to_use; |
53086306 | 1723 | const char *verbosity; |
94c55f17 | 1724 | struct stat st; |
8c0faa1d | 1725 | |
3bd1e081 | 1726 | DBG("Spawning consumerd"); |
c49dc785 | 1727 | |
8c0faa1d DG |
1728 | pid = fork(); |
1729 | if (pid == 0) { | |
1730 | /* | |
3bd1e081 | 1731 | * Exec consumerd. |
8c0faa1d | 1732 | */ |
daee5345 | 1733 | if (opt_verbose_consumer) { |
53086306 DG |
1734 | verbosity = "--verbose"; |
1735 | } else { | |
1736 | verbosity = "--quiet"; | |
1737 | } | |
3bd1e081 MD |
1738 | switch (consumer_data->type) { |
1739 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 1740 | /* |
c7704d57 DG |
1741 | * Find out which consumerd to execute. We will first try the |
1742 | * 64-bit path, then the sessiond's installation directory, and | |
1743 | * fallback on the 32-bit one, | |
94c55f17 | 1744 | */ |
63a799e8 AM |
1745 | DBG3("Looking for a kernel consumer at these locations:"); |
1746 | DBG3(" 1) %s", consumerd64_bin); | |
1747 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
1748 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 1749 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 1750 | DBG3("Found location #1"); |
94c55f17 | 1751 | consumer_to_use = consumerd64_bin; |
94c55f17 | 1752 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 1753 | DBG3("Found location #2"); |
94c55f17 | 1754 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 1755 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 1756 | DBG3("Found location #3"); |
eb1e0bd4 | 1757 | consumer_to_use = consumerd32_bin; |
94c55f17 | 1758 | } else { |
63a799e8 | 1759 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
1760 | break; |
1761 | } | |
1762 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
1763 | execl(consumer_to_use, | |
1764 | "lttng-consumerd", verbosity, "-k", | |
1765 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
1766 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1767 | NULL); | |
3bd1e081 | 1768 | break; |
7753dea8 MD |
1769 | case LTTNG_CONSUMER64_UST: |
1770 | { | |
b1e0b6b6 | 1771 | char *tmpnew = NULL; |
8f4905da MD |
1772 | |
1773 | if (consumerd64_libdir[0] != '\0') { | |
1774 | char *tmp; | |
1775 | size_t tmplen; | |
1776 | ||
1777 | tmp = getenv("LD_LIBRARY_PATH"); | |
1778 | if (!tmp) { | |
1779 | tmp = ""; | |
1780 | } | |
1781 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1782 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
1783 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1784 | if (!tmpnew) { | |
1785 | ret = -ENOMEM; | |
1786 | goto error; | |
1787 | } | |
1788 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1789 | strcat(tmpnew, consumerd64_libdir); | |
1790 | if (tmp[0] != '\0') { | |
1791 | strcat(tmpnew, ":"); | |
1792 | strcat(tmpnew, tmp); | |
1793 | } | |
1794 | ret = putenv(tmpnew); | |
1795 | if (ret) { | |
1796 | ret = -errno; | |
1797 | goto error; | |
1798 | } | |
1799 | } | |
94c55f17 | 1800 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 1801 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1802 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1803 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1804 | NULL); | |
8f4905da MD |
1805 | if (consumerd64_libdir[0] != '\0') { |
1806 | free(tmpnew); | |
1807 | } | |
1808 | if (ret) { | |
1809 | goto error; | |
1810 | } | |
3bd1e081 | 1811 | break; |
7753dea8 MD |
1812 | } |
1813 | case LTTNG_CONSUMER32_UST: | |
1814 | { | |
937dde8e | 1815 | char *tmpnew = NULL; |
8f4905da MD |
1816 | |
1817 | if (consumerd32_libdir[0] != '\0') { | |
1818 | char *tmp; | |
1819 | size_t tmplen; | |
1820 | ||
1821 | tmp = getenv("LD_LIBRARY_PATH"); | |
1822 | if (!tmp) { | |
1823 | tmp = ""; | |
1824 | } | |
1825 | tmplen = strlen("LD_LIBRARY_PATH=") | |
1826 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
1827 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
1828 | if (!tmpnew) { | |
1829 | ret = -ENOMEM; | |
1830 | goto error; | |
1831 | } | |
1832 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
1833 | strcat(tmpnew, consumerd32_libdir); | |
1834 | if (tmp[0] != '\0') { | |
1835 | strcat(tmpnew, ":"); | |
1836 | strcat(tmpnew, tmp); | |
1837 | } | |
1838 | ret = putenv(tmpnew); | |
1839 | if (ret) { | |
1840 | ret = -errno; | |
1841 | goto error; | |
1842 | } | |
1843 | } | |
94c55f17 | 1844 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 1845 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
1846 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
1847 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
1848 | NULL); | |
8f4905da MD |
1849 | if (consumerd32_libdir[0] != '\0') { |
1850 | free(tmpnew); | |
1851 | } | |
1852 | if (ret) { | |
1853 | goto error; | |
1854 | } | |
7753dea8 MD |
1855 | break; |
1856 | } | |
3bd1e081 | 1857 | default: |
76d7553f | 1858 | PERROR("unknown consumer type"); |
3bd1e081 MD |
1859 | exit(EXIT_FAILURE); |
1860 | } | |
8c0faa1d | 1861 | if (errno != 0) { |
76d7553f | 1862 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
1863 | } |
1864 | exit(EXIT_FAILURE); | |
1865 | } else if (pid > 0) { | |
1866 | ret = pid; | |
8c0faa1d | 1867 | } else { |
76d7553f | 1868 | PERROR("start consumer fork"); |
8c0faa1d | 1869 | ret = -errno; |
8c0faa1d | 1870 | } |
8f4905da | 1871 | error: |
8c0faa1d DG |
1872 | return ret; |
1873 | } | |
1874 | ||
693bd40b | 1875 | /* |
3bd1e081 | 1876 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 1877 | */ |
3bd1e081 | 1878 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 1879 | { |
c617c0c6 | 1880 | int ret; |
edb8b045 DG |
1881 | |
1882 | /* | |
1883 | * Set the listen() state on the socket since there is a possible race | |
1884 | * between the exec() of the consumer daemon and this call if place in the | |
1885 | * consumer thread. See bug #366 for more details. | |
1886 | */ | |
1887 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
1888 | if (ret < 0) { | |
1889 | goto error; | |
1890 | } | |
693bd40b | 1891 | |
3bd1e081 MD |
1892 | pthread_mutex_lock(&consumer_data->pid_mutex); |
1893 | if (consumer_data->pid != 0) { | |
1894 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
1895 | goto end; |
1896 | } | |
693bd40b | 1897 | |
3bd1e081 | 1898 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 1899 | if (ret < 0) { |
3bd1e081 MD |
1900 | ERR("Spawning consumerd failed"); |
1901 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 1902 | goto error; |
693bd40b | 1903 | } |
c49dc785 | 1904 | |
3bd1e081 MD |
1905 | /* Setting up the consumer_data pid */ |
1906 | consumer_data->pid = ret; | |
48842b30 | 1907 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 1908 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 1909 | |
3bd1e081 MD |
1910 | DBG2("Spawning consumer control thread"); |
1911 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 1912 | if (ret < 0) { |
3bd1e081 | 1913 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
1914 | goto error; |
1915 | } | |
1916 | ||
c49dc785 | 1917 | end: |
693bd40b DG |
1918 | return 0; |
1919 | ||
1920 | error: | |
edb8b045 DG |
1921 | /* Cleanup already created socket on error. */ |
1922 | if (consumer_data->err_sock >= 0) { | |
c617c0c6 MD |
1923 | int err; |
1924 | ||
edb8b045 DG |
1925 | err = close(consumer_data->err_sock); |
1926 | if (err < 0) { | |
1927 | PERROR("close consumer data error socket"); | |
1928 | } | |
1929 | } | |
693bd40b DG |
1930 | return ret; |
1931 | } | |
1932 | ||
44a5e5eb | 1933 | /* |
139ac872 MD |
1934 | * Compute health status of each consumer. If one of them is zero (bad |
1935 | * state), we return 0. | |
44a5e5eb DG |
1936 | */ |
1937 | static int check_consumer_health(void) | |
1938 | { | |
1939 | int ret; | |
1940 | ||
769b7d7e | 1941 | ret = health_check_state(HEALTH_TYPE_CONSUMER); |
44a5e5eb DG |
1942 | |
1943 | DBG3("Health consumer check %d", ret); | |
1944 | ||
1945 | return ret; | |
1946 | } | |
1947 | ||
b73401da | 1948 | /* |
096102bd | 1949 | * Setup necessary data for kernel tracer action. |
b73401da | 1950 | */ |
096102bd | 1951 | static int init_kernel_tracer(void) |
b73401da DG |
1952 | { |
1953 | int ret; | |
b73401da | 1954 | |
096102bd DG |
1955 | /* Modprobe lttng kernel modules */ |
1956 | ret = modprobe_lttng_control(); | |
b73401da | 1957 | if (ret < 0) { |
b73401da DG |
1958 | goto error; |
1959 | } | |
1960 | ||
096102bd DG |
1961 | /* Open debugfs lttng */ |
1962 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1963 | if (kernel_tracer_fd < 0) { | |
1964 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
1965 | ret = -1; |
1966 | goto error_open; | |
54d01ffb DG |
1967 | } |
1968 | ||
2f77fc4b DG |
1969 | /* Validate kernel version */ |
1970 | ret = kernel_validate_version(kernel_tracer_fd); | |
1971 | if (ret < 0) { | |
1972 | goto error_version; | |
b551a063 | 1973 | } |
54d01ffb | 1974 | |
2f77fc4b DG |
1975 | ret = modprobe_lttng_data(); |
1976 | if (ret < 0) { | |
1977 | goto error_modules; | |
54d01ffb DG |
1978 | } |
1979 | ||
2f77fc4b DG |
1980 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1981 | return 0; | |
1982 | ||
1983 | error_version: | |
1984 | modprobe_remove_lttng_control(); | |
1985 | ret = close(kernel_tracer_fd); | |
1986 | if (ret) { | |
1987 | PERROR("close"); | |
b551a063 | 1988 | } |
2f77fc4b | 1989 | kernel_tracer_fd = -1; |
f73fabfd | 1990 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1991 | |
2f77fc4b DG |
1992 | error_modules: |
1993 | ret = close(kernel_tracer_fd); | |
1994 | if (ret) { | |
1995 | PERROR("close"); | |
b551a063 | 1996 | } |
54d01ffb | 1997 | |
2f77fc4b DG |
1998 | error_open: |
1999 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2000 | |
2001 | error: | |
2f77fc4b DG |
2002 | WARN("No kernel tracer available"); |
2003 | kernel_tracer_fd = -1; | |
2004 | if (!is_root) { | |
f73fabfd | 2005 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2006 | } else { |
f73fabfd | 2007 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2008 | } |
54d01ffb DG |
2009 | } |
2010 | ||
2f77fc4b | 2011 | |
54d01ffb | 2012 | /* |
2f77fc4b DG |
2013 | * Copy consumer output from the tracing session to the domain session. The |
2014 | * function also applies the right modification on a per domain basis for the | |
2015 | * trace files destination directory. | |
54d01ffb | 2016 | */ |
2f77fc4b | 2017 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2018 | { |
2019 | int ret; | |
2f77fc4b DG |
2020 | const char *dir_name; |
2021 | struct consumer_output *consumer; | |
2022 | ||
2023 | assert(session); | |
2024 | assert(session->consumer); | |
54d01ffb | 2025 | |
b551a063 DG |
2026 | switch (domain) { |
2027 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2028 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2029 | /* |
2030 | * XXX: We should audit the session creation and what this function | |
2031 | * does "extra" in order to avoid a destroy since this function is used | |
2032 | * in the domain session creation (kernel and ust) only. Same for UST | |
2033 | * domain. | |
2034 | */ | |
2035 | if (session->kernel_session->consumer) { | |
2036 | consumer_destroy_output(session->kernel_session->consumer); | |
2037 | } | |
2f77fc4b DG |
2038 | session->kernel_session->consumer = |
2039 | consumer_copy_output(session->consumer); | |
2040 | /* Ease our life a bit for the next part */ | |
2041 | consumer = session->kernel_session->consumer; | |
2042 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 DG |
2043 | break; |
2044 | case LTTNG_DOMAIN_UST: | |
2f77fc4b | 2045 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2046 | if (session->ust_session->consumer) { |
2047 | consumer_destroy_output(session->ust_session->consumer); | |
2048 | } | |
2f77fc4b DG |
2049 | session->ust_session->consumer = |
2050 | consumer_copy_output(session->consumer); | |
2051 | /* Ease our life a bit for the next part */ | |
2052 | consumer = session->ust_session->consumer; | |
2053 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2054 | break; |
2055 | default: | |
f73fabfd | 2056 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2057 | goto error; |
2058 | } | |
2059 | ||
2f77fc4b | 2060 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2061 | strncat(consumer->subdir, dir_name, |
2062 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2063 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2064 | ||
f73fabfd | 2065 | ret = LTTNG_OK; |
54d01ffb DG |
2066 | |
2067 | error: | |
2068 | return ret; | |
2069 | } | |
2070 | ||
00e2e675 | 2071 | /* |
2f77fc4b | 2072 | * Create an UST session and add it to the session ust list. |
00e2e675 | 2073 | */ |
2f77fc4b DG |
2074 | static int create_ust_session(struct ltt_session *session, |
2075 | struct lttng_domain *domain) | |
00e2e675 DG |
2076 | { |
2077 | int ret; | |
2f77fc4b | 2078 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2079 | |
a4b92340 | 2080 | assert(session); |
2f77fc4b DG |
2081 | assert(domain); |
2082 | assert(session->consumer); | |
a4b92340 | 2083 | |
2f77fc4b DG |
2084 | switch (domain->type) { |
2085 | case LTTNG_DOMAIN_UST: | |
2086 | break; | |
2087 | default: | |
2088 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2089 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2090 | goto error; |
2091 | } | |
2092 | ||
2f77fc4b DG |
2093 | DBG("Creating UST session"); |
2094 | ||
2095 | lus = trace_ust_create_session(session->path, session->id, domain); | |
2096 | if (lus == NULL) { | |
f73fabfd | 2097 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2098 | goto error; |
2099 | } | |
2100 | ||
2f77fc4b DG |
2101 | lus->uid = session->uid; |
2102 | lus->gid = session->gid; | |
2103 | session->ust_session = lus; | |
00e2e675 | 2104 | |
2f77fc4b DG |
2105 | /* Copy session output to the newly created UST session */ |
2106 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2107 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2108 | goto error; |
2109 | } | |
2110 | ||
f73fabfd | 2111 | return LTTNG_OK; |
00e2e675 DG |
2112 | |
2113 | error: | |
2f77fc4b DG |
2114 | free(lus); |
2115 | session->ust_session = NULL; | |
00e2e675 DG |
2116 | return ret; |
2117 | } | |
2118 | ||
2119 | /* | |
2f77fc4b | 2120 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2121 | */ |
2f77fc4b | 2122 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2123 | { |
2124 | int ret; | |
a4b92340 | 2125 | |
2f77fc4b | 2126 | DBG("Creating kernel session"); |
00e2e675 | 2127 | |
2f77fc4b DG |
2128 | ret = kernel_create_session(session, kernel_tracer_fd); |
2129 | if (ret < 0) { | |
f73fabfd | 2130 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2131 | goto error; |
2132 | } | |
2133 | ||
2f77fc4b DG |
2134 | /* Code flow safety */ |
2135 | assert(session->kernel_session); | |
2136 | ||
2137 | /* Copy session output to the newly created Kernel session */ | |
2138 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2139 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2140 | goto error; |
2141 | } | |
2142 | ||
2f77fc4b DG |
2143 | /* Create directory(ies) on local filesystem. */ |
2144 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2145 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2146 | ret = run_as_mkdir_recursive( | |
2147 | session->kernel_session->consumer->dst.trace_path, | |
2148 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2149 | if (ret < 0) { | |
2150 | if (ret != -EEXIST) { | |
2151 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2152 | goto error; |
2153 | } | |
00e2e675 | 2154 | } |
2f77fc4b | 2155 | } |
00e2e675 | 2156 | |
2f77fc4b DG |
2157 | session->kernel_session->uid = session->uid; |
2158 | session->kernel_session->gid = session->gid; | |
00e2e675 | 2159 | |
f73fabfd | 2160 | return LTTNG_OK; |
00e2e675 | 2161 | |
2f77fc4b DG |
2162 | error: |
2163 | trace_kernel_destroy_session(session->kernel_session); | |
2164 | session->kernel_session = NULL; | |
2165 | return ret; | |
2166 | } | |
00e2e675 | 2167 | |
2f77fc4b DG |
2168 | /* |
2169 | * Count number of session permitted by uid/gid. | |
2170 | */ | |
2171 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2172 | { | |
2173 | unsigned int i = 0; | |
2174 | struct ltt_session *session; | |
07424f16 | 2175 | |
2f77fc4b DG |
2176 | DBG("Counting number of available session for UID %d GID %d", |
2177 | uid, gid); | |
2178 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2179 | /* |
2f77fc4b | 2180 | * Only list the sessions the user can control. |
00e2e675 | 2181 | */ |
2f77fc4b DG |
2182 | if (!session_access_ok(session, uid, gid)) { |
2183 | continue; | |
2184 | } | |
2185 | i++; | |
a4b92340 | 2186 | } |
2f77fc4b | 2187 | return i; |
00e2e675 DG |
2188 | } |
2189 | ||
54d01ffb DG |
2190 | /* |
2191 | * Process the command requested by the lttng client within the command | |
2192 | * context structure. This function make sure that the return structure (llm) | |
2193 | * is set and ready for transmission before returning. | |
2194 | * | |
2195 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2196 | * |
2197 | * "sock" is only used for special-case var. len data. | |
54d01ffb | 2198 | */ |
53a80697 MD |
2199 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2200 | int *sock_error) | |
54d01ffb | 2201 | { |
f73fabfd | 2202 | int ret = LTTNG_OK; |
44d3bd01 | 2203 | int need_tracing_session = 1; |
2e09ba09 | 2204 | int need_domain; |
54d01ffb DG |
2205 | |
2206 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2207 | ||
53a80697 MD |
2208 | *sock_error = 0; |
2209 | ||
2e09ba09 MD |
2210 | switch (cmd_ctx->lsm->cmd_type) { |
2211 | case LTTNG_CREATE_SESSION: | |
2212 | case LTTNG_DESTROY_SESSION: | |
2213 | case LTTNG_LIST_SESSIONS: | |
2214 | case LTTNG_LIST_DOMAINS: | |
2215 | case LTTNG_START_TRACE: | |
2216 | case LTTNG_STOP_TRACE: | |
6d805429 | 2217 | case LTTNG_DATA_PENDING: |
2e09ba09 | 2218 | need_domain = 0; |
3aace903 | 2219 | break; |
2e09ba09 MD |
2220 | default: |
2221 | need_domain = 1; | |
2222 | } | |
2223 | ||
2224 | if (opt_no_kernel && need_domain | |
2225 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2226 | if (!is_root) { |
f73fabfd | 2227 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2228 | } else { |
f73fabfd | 2229 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2230 | } |
4fba7219 DG |
2231 | goto error; |
2232 | } | |
2233 | ||
8d3113b2 DG |
2234 | /* Deny register consumer if we already have a spawned consumer. */ |
2235 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2236 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2237 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2238 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2239 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2240 | goto error; |
2241 | } | |
2242 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2243 | } | |
2244 | ||
54d01ffb DG |
2245 | /* |
2246 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2247 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2248 | * command. |
2249 | */ | |
2250 | switch(cmd_ctx->lsm->cmd_type) { | |
2251 | case LTTNG_LIST_SESSIONS: | |
2252 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2253 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2254 | case LTTNG_LIST_DOMAINS: |
2255 | case LTTNG_LIST_CHANNELS: | |
2256 | case LTTNG_LIST_EVENTS: | |
2257 | break; | |
2258 | default: | |
2259 | /* Setup lttng message with no payload */ | |
2260 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2261 | if (ret < 0) { | |
2262 | /* This label does not try to unlock the session */ | |
2263 | goto init_setup_error; | |
2264 | } | |
2265 | } | |
2266 | ||
2267 | /* Commands that DO NOT need a session. */ | |
2268 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2269 | case LTTNG_CREATE_SESSION: |
2e09ba09 | 2270 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2271 | case LTTNG_LIST_SESSIONS: |
2272 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2273 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2274 | need_tracing_session = 0; |
54d01ffb DG |
2275 | break; |
2276 | default: | |
2277 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2278 | /* |
2279 | * We keep the session list lock across _all_ commands | |
2280 | * for now, because the per-session lock does not | |
2281 | * handle teardown properly. | |
2282 | */ | |
74babd95 | 2283 | session_lock_list(); |
54d01ffb DG |
2284 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2285 | if (cmd_ctx->session == NULL) { | |
2286 | if (cmd_ctx->lsm->session.name != NULL) { | |
f73fabfd | 2287 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2288 | } else { |
2289 | /* If no session name specified */ | |
f73fabfd | 2290 | ret = LTTNG_ERR_SELECT_SESS; |
54d01ffb DG |
2291 | } |
2292 | goto error; | |
2293 | } else { | |
2294 | /* Acquire lock for the session */ | |
2295 | session_lock(cmd_ctx->session); | |
2296 | } | |
2297 | break; | |
2298 | } | |
b389abbe | 2299 | |
2e09ba09 MD |
2300 | if (!need_domain) { |
2301 | goto skip_domain; | |
2302 | } | |
a4b92340 | 2303 | |
54d01ffb DG |
2304 | /* |
2305 | * Check domain type for specific "pre-action". | |
2306 | */ | |
2307 | switch (cmd_ctx->lsm->domain.type) { | |
2308 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2309 | if (!is_root) { |
f73fabfd | 2310 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2311 | goto error; |
2312 | } | |
2313 | ||
54d01ffb | 2314 | /* Kernel tracer check */ |
a4b35e07 | 2315 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2316 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2317 | ret = init_kernel_tracer(); |
2318 | if (ret != 0) { | |
54d01ffb DG |
2319 | goto error; |
2320 | } | |
2321 | } | |
5eb91c98 | 2322 | |
5c827ce0 DG |
2323 | /* Consumer is in an ERROR state. Report back to client */ |
2324 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2325 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2326 | goto error; |
2327 | } | |
2328 | ||
54d01ffb | 2329 | /* Need a session for kernel command */ |
44d3bd01 | 2330 | if (need_tracing_session) { |
54d01ffb | 2331 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2332 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2333 | if (ret < 0) { |
f73fabfd | 2334 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2335 | goto error; |
2336 | } | |
b389abbe | 2337 | } |
7d29a247 | 2338 | |
54d01ffb | 2339 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2340 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2341 | if (kconsumer_data.pid == 0 && | |
a4b92340 DG |
2342 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2343 | cmd_ctx->session->start_consumer) { | |
3bd1e081 MD |
2344 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2345 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2346 | if (ret < 0) { |
f73fabfd | 2347 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2348 | goto error; |
950131af | 2349 | } |
5c827ce0 | 2350 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2351 | } else { |
2352 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2353 | } |
173af62f | 2354 | |
a4b92340 DG |
2355 | /* |
2356 | * The consumer was just spawned so we need to add the socket to | |
2357 | * the consumer output of the session if exist. | |
2358 | */ | |
2359 | ret = consumer_create_socket(&kconsumer_data, | |
2360 | cmd_ctx->session->kernel_session->consumer); | |
2361 | if (ret < 0) { | |
2362 | goto error; | |
173af62f | 2363 | } |
0d0c377a | 2364 | } |
5c827ce0 | 2365 | |
54d01ffb | 2366 | break; |
2bdd86d4 | 2367 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2368 | { |
5c827ce0 DG |
2369 | /* Consumer is in an ERROR state. Report back to client */ |
2370 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2371 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2372 | goto error; |
2373 | } | |
2374 | ||
44d3bd01 | 2375 | if (need_tracing_session) { |
a4b92340 | 2376 | /* Create UST session if none exist. */ |
f6a9efaa | 2377 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2378 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2379 | &cmd_ctx->lsm->domain); |
f73fabfd | 2380 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2381 | goto error; |
2382 | } | |
2383 | } | |
00e2e675 | 2384 | |
7753dea8 MD |
2385 | /* Start the UST consumer daemons */ |
2386 | /* 64-bit */ | |
2387 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2388 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2389 | ustconsumer64_data.pid == 0 && |
a4b92340 DG |
2390 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2391 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2392 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2393 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2394 | if (ret < 0) { |
f73fabfd | 2395 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2396 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2397 | goto error; |
2398 | } | |
48842b30 | 2399 | |
173af62f | 2400 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2401 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2402 | } else { |
7753dea8 MD |
2403 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2404 | } | |
173af62f DG |
2405 | |
2406 | /* | |
2407 | * Setup socket for consumer 64 bit. No need for atomic access | |
2408 | * since it was set above and can ONLY be set in this thread. | |
2409 | */ | |
a4b92340 DG |
2410 | ret = consumer_create_socket(&ustconsumer64_data, |
2411 | cmd_ctx->session->ust_session->consumer); | |
2412 | if (ret < 0) { | |
2413 | goto error; | |
173af62f DG |
2414 | } |
2415 | ||
7753dea8 | 2416 | /* 32-bit */ |
fc7a59ce | 2417 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2418 | ustconsumer32_data.pid == 0 && |
a4b92340 DG |
2419 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER && |
2420 | cmd_ctx->session->start_consumer) { | |
7753dea8 MD |
2421 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2422 | ret = start_consumerd(&ustconsumer32_data); | |
2423 | if (ret < 0) { | |
f73fabfd | 2424 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2425 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2426 | goto error; |
2427 | } | |
5c827ce0 | 2428 | |
173af62f | 2429 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2430 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2431 | } else { |
2432 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2433 | } |
173af62f DG |
2434 | |
2435 | /* | |
2436 | * Setup socket for consumer 64 bit. No need for atomic access | |
2437 | * since it was set above and can ONLY be set in this thread. | |
2438 | */ | |
a4b92340 DG |
2439 | ret = consumer_create_socket(&ustconsumer32_data, |
2440 | cmd_ctx->session->ust_session->consumer); | |
2441 | if (ret < 0) { | |
2442 | goto error; | |
173af62f | 2443 | } |
44d3bd01 DG |
2444 | } |
2445 | break; | |
48842b30 | 2446 | } |
54d01ffb | 2447 | default: |
54d01ffb DG |
2448 | break; |
2449 | } | |
2e09ba09 | 2450 | skip_domain: |
33a2b854 | 2451 | |
5c827ce0 DG |
2452 | /* Validate consumer daemon state when start/stop trace command */ |
2453 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2454 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2455 | switch (cmd_ctx->lsm->domain.type) { | |
2456 | case LTTNG_DOMAIN_UST: | |
2457 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2458 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2459 | goto error; |
2460 | } | |
2461 | break; | |
2462 | case LTTNG_DOMAIN_KERNEL: | |
2463 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2464 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2465 | goto error; |
2466 | } | |
2467 | break; | |
2468 | } | |
2469 | } | |
2470 | ||
8e0af1b4 MD |
2471 | /* |
2472 | * Check that the UID or GID match that of the tracing session. | |
2473 | * The root user can interact with all sessions. | |
2474 | */ | |
2475 | if (need_tracing_session) { | |
2476 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2477 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2478 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2479 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2480 | goto error; |
2481 | } | |
2482 | } | |
2483 | ||
54d01ffb DG |
2484 | /* Process by command type */ |
2485 | switch (cmd_ctx->lsm->cmd_type) { | |
2486 | case LTTNG_ADD_CONTEXT: | |
2487 | { | |
2488 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2489 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2490 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2491 | break; |
2492 | } | |
2493 | case LTTNG_DISABLE_CHANNEL: | |
2494 | { | |
2495 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2496 | cmd_ctx->lsm->u.disable.channel_name); | |
2497 | break; | |
2498 | } | |
2499 | case LTTNG_DISABLE_EVENT: | |
2500 | { | |
2501 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2502 | cmd_ctx->lsm->u.disable.channel_name, | |
2503 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2504 | break; |
2505 | } | |
54d01ffb DG |
2506 | case LTTNG_DISABLE_ALL_EVENT: |
2507 | { | |
2bdd86d4 | 2508 | DBG("Disabling all events"); |
54d01ffb DG |
2509 | |
2510 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2511 | cmd_ctx->lsm->u.disable.channel_name); | |
2512 | break; | |
2513 | } | |
00e2e675 DG |
2514 | case LTTNG_DISABLE_CONSUMER: |
2515 | { | |
2516 | ret = cmd_disable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); | |
2517 | break; | |
2518 | } | |
54d01ffb DG |
2519 | case LTTNG_ENABLE_CHANNEL: |
2520 | { | |
aea829b3 | 2521 | ret = cmd_enable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2522 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2523 | break; |
2524 | } | |
00e2e675 DG |
2525 | case LTTNG_ENABLE_CONSUMER: |
2526 | { | |
a4b92340 DG |
2527 | /* |
2528 | * XXX: 0 means that this URI should be applied on the session. Should | |
2529 | * be a DOMAIN enuam. | |
2530 | */ | |
00e2e675 | 2531 | ret = cmd_enable_consumer(cmd_ctx->lsm->domain.type, cmd_ctx->session); |
f73fabfd | 2532 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2533 | goto error; |
2534 | } | |
2535 | ||
2536 | if (cmd_ctx->lsm->domain.type == 0) { | |
2537 | /* Add the URI for the UST session if a consumer is present. */ | |
2538 | if (cmd_ctx->session->ust_session && | |
2539 | cmd_ctx->session->ust_session->consumer) { | |
2540 | ret = cmd_enable_consumer(LTTNG_DOMAIN_UST, cmd_ctx->session); | |
2541 | } else if (cmd_ctx->session->kernel_session && | |
2542 | cmd_ctx->session->kernel_session->consumer) { | |
2543 | ret = cmd_enable_consumer(LTTNG_DOMAIN_KERNEL, | |
2544 | cmd_ctx->session); | |
2545 | } | |
2546 | } | |
00e2e675 DG |
2547 | break; |
2548 | } | |
54d01ffb DG |
2549 | case LTTNG_ENABLE_EVENT: |
2550 | { | |
2551 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2552 | cmd_ctx->lsm->u.enable.channel_name, | |
025faf73 | 2553 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2554 | break; |
2555 | } | |
2556 | case LTTNG_ENABLE_ALL_EVENT: | |
2557 | { | |
2bdd86d4 | 2558 | DBG("Enabling all events"); |
54d01ffb DG |
2559 | |
2560 | ret = cmd_enable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
8c9ae521 | 2561 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2562 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2563 | break; |
2564 | } | |
052da939 | 2565 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2566 | { |
9f19cc17 | 2567 | struct lttng_event *events; |
54d01ffb | 2568 | ssize_t nb_events; |
052da939 | 2569 | |
54d01ffb DG |
2570 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2571 | if (nb_events < 0) { | |
f73fabfd | 2572 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2573 | ret = -nb_events; |
2574 | goto error; | |
2ef84c95 DG |
2575 | } |
2576 | ||
2577 | /* | |
2578 | * Setup lttng message with payload size set to the event list size in | |
2579 | * bytes and then copy list into the llm payload. | |
2580 | */ | |
052da939 | 2581 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2582 | if (ret < 0) { |
052da939 | 2583 | free(events); |
2ef84c95 DG |
2584 | goto setup_error; |
2585 | } | |
2586 | ||
2587 | /* Copy event list into message payload */ | |
9f19cc17 | 2588 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2589 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2590 | |
9f19cc17 | 2591 | free(events); |
2ef84c95 | 2592 | |
f73fabfd | 2593 | ret = LTTNG_OK; |
2ef84c95 DG |
2594 | break; |
2595 | } | |
f37d259d MD |
2596 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2597 | { | |
2598 | struct lttng_event_field *fields; | |
2599 | ssize_t nb_fields; | |
2600 | ||
a4b92340 DG |
2601 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2602 | &fields); | |
f37d259d | 2603 | if (nb_fields < 0) { |
f73fabfd | 2604 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2605 | ret = -nb_fields; |
2606 | goto error; | |
2607 | } | |
2608 | ||
2609 | /* | |
2610 | * Setup lttng message with payload size set to the event list size in | |
2611 | * bytes and then copy list into the llm payload. | |
2612 | */ | |
a4b92340 DG |
2613 | ret = setup_lttng_msg(cmd_ctx, |
2614 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2615 | if (ret < 0) { |
2616 | free(fields); | |
2617 | goto setup_error; | |
2618 | } | |
2619 | ||
2620 | /* Copy event list into message payload */ | |
2621 | memcpy(cmd_ctx->llm->payload, fields, | |
2622 | sizeof(struct lttng_event_field) * nb_fields); | |
2623 | ||
2624 | free(fields); | |
2625 | ||
f73fabfd | 2626 | ret = LTTNG_OK; |
f37d259d MD |
2627 | break; |
2628 | } | |
00e2e675 DG |
2629 | case LTTNG_SET_CONSUMER_URI: |
2630 | { | |
a4b92340 DG |
2631 | size_t nb_uri, len; |
2632 | struct lttng_uri *uris; | |
2633 | ||
2634 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2635 | len = nb_uri * sizeof(struct lttng_uri); | |
2636 | ||
2637 | if (nb_uri == 0) { | |
f73fabfd | 2638 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
2639 | goto error; |
2640 | } | |
2641 | ||
2642 | uris = zmalloc(len); | |
2643 | if (uris == NULL) { | |
f73fabfd | 2644 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2645 | goto error; |
2646 | } | |
2647 | ||
2648 | /* Receive variable len data */ | |
77c7c900 | 2649 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
2650 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2651 | if (ret <= 0) { | |
2652 | DBG("No URIs received from client... continuing"); | |
2653 | *sock_error = 1; | |
f73fabfd | 2654 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2655 | free(uris); |
a4b92340 DG |
2656 | goto error; |
2657 | } | |
2658 | ||
00e2e675 | 2659 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 2660 | nb_uri, uris); |
f73fabfd | 2661 | if (ret != LTTNG_OK) { |
b1d41407 | 2662 | free(uris); |
a4b92340 DG |
2663 | goto error; |
2664 | } | |
2665 | ||
2666 | /* | |
2667 | * XXX: 0 means that this URI should be applied on the session. Should | |
2668 | * be a DOMAIN enuam. | |
2669 | */ | |
2670 | if (cmd_ctx->lsm->domain.type == 0) { | |
2671 | /* Add the URI for the UST session if a consumer is present. */ | |
2672 | if (cmd_ctx->session->ust_session && | |
2673 | cmd_ctx->session->ust_session->consumer) { | |
2674 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
2675 | nb_uri, uris); | |
2676 | } else if (cmd_ctx->session->kernel_session && | |
2677 | cmd_ctx->session->kernel_session->consumer) { | |
2678 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
2679 | cmd_ctx->session, nb_uri, uris); | |
2680 | } | |
2681 | } | |
2682 | ||
b1d41407 DG |
2683 | free(uris); |
2684 | ||
00e2e675 DG |
2685 | break; |
2686 | } | |
f3ed775e | 2687 | case LTTNG_START_TRACE: |
8c0faa1d | 2688 | { |
54d01ffb | 2689 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
2690 | break; |
2691 | } | |
f3ed775e | 2692 | case LTTNG_STOP_TRACE: |
8c0faa1d | 2693 | { |
54d01ffb | 2694 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
2695 | break; |
2696 | } | |
5e16da05 MD |
2697 | case LTTNG_CREATE_SESSION: |
2698 | { | |
a4b92340 DG |
2699 | size_t nb_uri, len; |
2700 | struct lttng_uri *uris = NULL; | |
2701 | ||
2702 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
2703 | len = nb_uri * sizeof(struct lttng_uri); | |
2704 | ||
2705 | if (nb_uri > 0) { | |
2706 | uris = zmalloc(len); | |
2707 | if (uris == NULL) { | |
f73fabfd | 2708 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
2709 | goto error; |
2710 | } | |
2711 | ||
2712 | /* Receive variable len data */ | |
77c7c900 | 2713 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
2714 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
2715 | if (ret <= 0) { | |
2716 | DBG("No URIs received from client... continuing"); | |
2717 | *sock_error = 1; | |
f73fabfd | 2718 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2719 | free(uris); |
a4b92340 DG |
2720 | goto error; |
2721 | } | |
2722 | ||
2723 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
2724 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 2725 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 2726 | free(uris); |
a4b92340 DG |
2727 | goto error; |
2728 | } | |
2729 | } | |
2730 | ||
2731 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
2732 | &cmd_ctx->creds); | |
2733 | ||
b1d41407 DG |
2734 | free(uris); |
2735 | ||
00e2e675 DG |
2736 | break; |
2737 | } | |
5e16da05 MD |
2738 | case LTTNG_DESTROY_SESSION: |
2739 | { | |
2f77fc4b | 2740 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
2741 | |
2742 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 2743 | cmd_ctx->session = NULL; |
5461b305 | 2744 | break; |
5e16da05 | 2745 | } |
9f19cc17 | 2746 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 2747 | { |
54d01ffb DG |
2748 | ssize_t nb_dom; |
2749 | struct lttng_domain *domains; | |
5461b305 | 2750 | |
54d01ffb DG |
2751 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
2752 | if (nb_dom < 0) { | |
f73fabfd | 2753 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2754 | ret = -nb_dom; |
2755 | goto error; | |
ce3d728c | 2756 | } |
520ff687 | 2757 | |
54d01ffb | 2758 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 DG |
2759 | if (ret < 0) { |
2760 | goto setup_error; | |
520ff687 | 2761 | } |
57167058 | 2762 | |
54d01ffb DG |
2763 | /* Copy event list into message payload */ |
2764 | memcpy(cmd_ctx->llm->payload, domains, | |
2765 | nb_dom * sizeof(struct lttng_domain)); | |
2766 | ||
2767 | free(domains); | |
5e16da05 | 2768 | |
f73fabfd | 2769 | ret = LTTNG_OK; |
5e16da05 MD |
2770 | break; |
2771 | } | |
9f19cc17 | 2772 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 2773 | { |
6775595e | 2774 | int nb_chan; |
54d01ffb DG |
2775 | struct lttng_channel *channels; |
2776 | ||
b551a063 DG |
2777 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
2778 | cmd_ctx->session, &channels); | |
54d01ffb | 2779 | if (nb_chan < 0) { |
f73fabfd | 2780 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2781 | ret = -nb_chan; |
2782 | goto error; | |
5461b305 | 2783 | } |
ca95a216 | 2784 | |
54d01ffb | 2785 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 DG |
2786 | if (ret < 0) { |
2787 | goto setup_error; | |
2788 | } | |
9f19cc17 | 2789 | |
54d01ffb DG |
2790 | /* Copy event list into message payload */ |
2791 | memcpy(cmd_ctx->llm->payload, channels, | |
2792 | nb_chan * sizeof(struct lttng_channel)); | |
2793 | ||
2794 | free(channels); | |
9f19cc17 | 2795 | |
f73fabfd | 2796 | ret = LTTNG_OK; |
5461b305 | 2797 | break; |
5e16da05 | 2798 | } |
9f19cc17 | 2799 | case LTTNG_LIST_EVENTS: |
5e16da05 | 2800 | { |
b551a063 | 2801 | ssize_t nb_event; |
684d34d2 | 2802 | struct lttng_event *events = NULL; |
9f19cc17 | 2803 | |
b551a063 | 2804 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
2805 | cmd_ctx->lsm->u.list.channel_name, &events); |
2806 | if (nb_event < 0) { | |
f73fabfd | 2807 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2808 | ret = -nb_event; |
2809 | goto error; | |
5461b305 | 2810 | } |
ca95a216 | 2811 | |
54d01ffb | 2812 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 DG |
2813 | if (ret < 0) { |
2814 | goto setup_error; | |
2815 | } | |
9f19cc17 | 2816 | |
54d01ffb DG |
2817 | /* Copy event list into message payload */ |
2818 | memcpy(cmd_ctx->llm->payload, events, | |
2819 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 2820 | |
54d01ffb | 2821 | free(events); |
9f19cc17 | 2822 | |
f73fabfd | 2823 | ret = LTTNG_OK; |
5461b305 | 2824 | break; |
5e16da05 MD |
2825 | } |
2826 | case LTTNG_LIST_SESSIONS: | |
2827 | { | |
8e0af1b4 | 2828 | unsigned int nr_sessions; |
5461b305 | 2829 | |
8e0af1b4 | 2830 | session_lock_list(); |
730389d9 DG |
2831 | nr_sessions = lttng_sessions_count( |
2832 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
2833 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 2834 | |
8e0af1b4 | 2835 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 2836 | if (ret < 0) { |
54d01ffb | 2837 | session_unlock_list(); |
5461b305 | 2838 | goto setup_error; |
e065084a | 2839 | } |
5e16da05 | 2840 | |
6c9cc2ab | 2841 | /* Filled the session array */ |
2f77fc4b | 2842 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
2843 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2844 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 2845 | |
54d01ffb | 2846 | session_unlock_list(); |
5e16da05 | 2847 | |
f73fabfd | 2848 | ret = LTTNG_OK; |
5e16da05 MD |
2849 | break; |
2850 | } | |
d0254c7c MD |
2851 | case LTTNG_CALIBRATE: |
2852 | { | |
54d01ffb DG |
2853 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
2854 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
2855 | break; |
2856 | } | |
d9800920 DG |
2857 | case LTTNG_REGISTER_CONSUMER: |
2858 | { | |
2f77fc4b DG |
2859 | struct consumer_data *cdata; |
2860 | ||
2861 | switch (cmd_ctx->lsm->domain.type) { | |
2862 | case LTTNG_DOMAIN_KERNEL: | |
2863 | cdata = &kconsumer_data; | |
2864 | break; | |
2865 | default: | |
f73fabfd | 2866 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
2867 | goto error; |
2868 | } | |
2869 | ||
54d01ffb | 2870 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 2871 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
2872 | break; |
2873 | } | |
025faf73 | 2874 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
2875 | { |
2876 | struct lttng_filter_bytecode *bytecode; | |
2877 | ||
025faf73 | 2878 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 2879 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2880 | goto error; |
2881 | } | |
52df2401 MD |
2882 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
2883 | ret = LTTNG_ERR_FILTER_INVAL; | |
2884 | goto error; | |
2885 | } | |
025faf73 | 2886 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 2887 | if (!bytecode) { |
f73fabfd | 2888 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
2889 | goto error; |
2890 | } | |
2891 | /* Receive var. len. data */ | |
2892 | DBG("Receiving var len data from client ..."); | |
2893 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 2894 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
2895 | if (ret <= 0) { |
2896 | DBG("Nothing recv() from client var len data... continuing"); | |
2897 | *sock_error = 1; | |
f73fabfd | 2898 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2899 | goto error; |
2900 | } | |
2901 | ||
2902 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 2903 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 2904 | free(bytecode); |
f73fabfd | 2905 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
2906 | goto error; |
2907 | } | |
2908 | ||
025faf73 DG |
2909 | ret = cmd_enable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2910 | cmd_ctx->lsm->u.enable.channel_name, | |
2911 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
2912 | break; |
2913 | } | |
6d805429 | 2914 | case LTTNG_DATA_PENDING: |
806e2684 | 2915 | { |
6d805429 | 2916 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
2917 | break; |
2918 | } | |
5e16da05 | 2919 | default: |
f73fabfd | 2920 | ret = LTTNG_ERR_UND; |
5461b305 | 2921 | break; |
fac6795d DG |
2922 | } |
2923 | ||
5461b305 | 2924 | error: |
5461b305 DG |
2925 | if (cmd_ctx->llm == NULL) { |
2926 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 2927 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
2928 | goto setup_error; |
2929 | } | |
2930 | } | |
54d01ffb | 2931 | /* Set return code */ |
5461b305 | 2932 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 2933 | setup_error: |
b5541356 | 2934 | if (cmd_ctx->session) { |
54d01ffb | 2935 | session_unlock(cmd_ctx->session); |
b5541356 | 2936 | } |
256a5576 MD |
2937 | if (need_tracing_session) { |
2938 | session_unlock_list(); | |
2939 | } | |
54d01ffb | 2940 | init_setup_error: |
8028d920 | 2941 | return ret; |
fac6795d DG |
2942 | } |
2943 | ||
44a5e5eb DG |
2944 | /* |
2945 | * Thread managing health check socket. | |
2946 | */ | |
2947 | static void *thread_manage_health(void *data) | |
2948 | { | |
eb4a2943 | 2949 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
2950 | uint32_t revents, nb_fd; |
2951 | struct lttng_poll_event events; | |
2952 | struct lttcomm_health_msg msg; | |
2953 | struct lttcomm_health_data reply; | |
2954 | ||
2955 | DBG("[thread] Manage health check started"); | |
2956 | ||
2957 | rcu_register_thread(); | |
2958 | ||
2959 | /* Create unix socket */ | |
2960 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
2961 | if (sock < 0) { | |
2962 | ERR("Unable to create health check Unix socket"); | |
2963 | ret = -1; | |
2964 | goto error; | |
2965 | } | |
2966 | ||
b662582b DG |
2967 | /* |
2968 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2969 | * show must go on. | |
2970 | */ | |
2971 | (void) utils_set_fd_cloexec(sock); | |
2972 | ||
44a5e5eb DG |
2973 | ret = lttcomm_listen_unix_sock(sock); |
2974 | if (ret < 0) { | |
2975 | goto error; | |
2976 | } | |
2977 | ||
2978 | /* | |
2979 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
2980 | * more will be added to this poll set. | |
2981 | */ | |
2982 | ret = create_thread_poll_set(&events, 2); | |
2983 | if (ret < 0) { | |
2984 | goto error; | |
2985 | } | |
2986 | ||
2987 | /* Add the application registration socket */ | |
2988 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
2989 | if (ret < 0) { | |
2990 | goto error; | |
2991 | } | |
2992 | ||
2993 | while (1) { | |
2994 | DBG("Health check ready"); | |
2995 | ||
44a5e5eb DG |
2996 | /* Inifinite blocking call, waiting for transmission */ |
2997 | restart: | |
2998 | ret = lttng_poll_wait(&events, -1); | |
2999 | if (ret < 0) { | |
3000 | /* | |
3001 | * Restart interrupted system call. | |
3002 | */ | |
3003 | if (errno == EINTR) { | |
3004 | goto restart; | |
3005 | } | |
3006 | goto error; | |
3007 | } | |
3008 | ||
0d9c5d77 DG |
3009 | nb_fd = ret; |
3010 | ||
44a5e5eb DG |
3011 | for (i = 0; i < nb_fd; i++) { |
3012 | /* Fetch once the poll data */ | |
3013 | revents = LTTNG_POLL_GETEV(&events, i); | |
3014 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3015 | ||
3016 | /* Thread quit pipe has been closed. Killing thread. */ | |
3017 | ret = check_thread_quit_pipe(pollfd, revents); | |
3018 | if (ret) { | |
139ac872 MD |
3019 | err = 0; |
3020 | goto exit; | |
44a5e5eb DG |
3021 | } |
3022 | ||
3023 | /* Event on the registration socket */ | |
3024 | if (pollfd == sock) { | |
3025 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3026 | ERR("Health socket poll error"); | |
3027 | goto error; | |
3028 | } | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | new_sock = lttcomm_accept_unix_sock(sock); | |
3033 | if (new_sock < 0) { | |
3034 | goto error; | |
3035 | } | |
3036 | ||
b662582b DG |
3037 | /* |
3038 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3039 | * show must go on. | |
3040 | */ | |
3041 | (void) utils_set_fd_cloexec(new_sock); | |
3042 | ||
44a5e5eb DG |
3043 | DBG("Receiving data from client for health..."); |
3044 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3045 | if (ret <= 0) { | |
3046 | DBG("Nothing recv() from client... continuing"); | |
3047 | ret = close(new_sock); | |
3048 | if (ret) { | |
3049 | PERROR("close"); | |
3050 | } | |
3051 | new_sock = -1; | |
3052 | continue; | |
3053 | } | |
3054 | ||
3055 | rcu_thread_online(); | |
3056 | ||
3057 | switch (msg.component) { | |
3058 | case LTTNG_HEALTH_CMD: | |
769b7d7e | 3059 | reply.ret_code = health_check_state(HEALTH_TYPE_CMD); |
44a5e5eb | 3060 | break; |
139ac872 | 3061 | case LTTNG_HEALTH_APP_MANAGE: |
769b7d7e | 3062 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_MANAGE); |
139ac872 | 3063 | break; |
44a5e5eb | 3064 | case LTTNG_HEALTH_APP_REG: |
769b7d7e | 3065 | reply.ret_code = health_check_state(HEALTH_TYPE_APP_REG); |
44a5e5eb DG |
3066 | break; |
3067 | case LTTNG_HEALTH_KERNEL: | |
769b7d7e | 3068 | reply.ret_code = health_check_state(HEALTH_TYPE_KERNEL); |
44a5e5eb DG |
3069 | break; |
3070 | case LTTNG_HEALTH_CONSUMER: | |
3071 | reply.ret_code = check_consumer_health(); | |
3072 | break; | |
3073 | case LTTNG_HEALTH_ALL: | |
44a5e5eb | 3074 | reply.ret_code = |
769b7d7e DG |
3075 | health_check_state(HEALTH_TYPE_APP_MANAGE) && |
3076 | health_check_state(HEALTH_TYPE_APP_REG) && | |
3077 | health_check_state(HEALTH_TYPE_CMD) && | |
3078 | health_check_state(HEALTH_TYPE_KERNEL) && | |
139ac872 | 3079 | check_consumer_health(); |
44a5e5eb DG |
3080 | break; |
3081 | default: | |
f73fabfd | 3082 | reply.ret_code = LTTNG_ERR_UND; |
44a5e5eb DG |
3083 | break; |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | * Flip ret value since 0 is a success and 1 indicates a bad health for | |
3088 | * the client where in the sessiond it is the opposite. Again, this is | |
3089 | * just to make things easier for us poor developer which enjoy a lot | |
3090 | * lazyness. | |
3091 | */ | |
3092 | if (reply.ret_code == 0 || reply.ret_code == 1) { | |
3093 | reply.ret_code = !reply.ret_code; | |
3094 | } | |
3095 | ||
3096 | DBG2("Health check return value %d", reply.ret_code); | |
3097 | ||
3098 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3099 | if (ret < 0) { | |
3100 | ERR("Failed to send health data back to client"); | |
3101 | } | |
3102 | ||
3103 | /* End of transmission */ | |
3104 | ret = close(new_sock); | |
3105 | if (ret) { | |
3106 | PERROR("close"); | |
3107 | } | |
3108 | new_sock = -1; | |
3109 | } | |
3110 | ||
139ac872 | 3111 | exit: |
44a5e5eb | 3112 | error: |
139ac872 MD |
3113 | if (err) { |
3114 | ERR("Health error occurred in %s", __func__); | |
3115 | } | |
44a5e5eb DG |
3116 | DBG("Health check thread dying"); |
3117 | unlink(health_unix_sock_path); | |
3118 | if (sock >= 0) { | |
3119 | ret = close(sock); | |
3120 | if (ret) { | |
3121 | PERROR("close"); | |
3122 | } | |
3123 | } | |
3124 | if (new_sock >= 0) { | |
3125 | ret = close(new_sock); | |
3126 | if (ret) { | |
3127 | PERROR("close"); | |
3128 | } | |
3129 | } | |
3130 | ||
3131 | lttng_poll_clean(&events); | |
3132 | ||
3133 | rcu_unregister_thread(); | |
3134 | return NULL; | |
3135 | } | |
3136 | ||
1d4b027a | 3137 | /* |
d063d709 DG |
3138 | * This thread manage all clients request using the unix client socket for |
3139 | * communication. | |
1d4b027a DG |
3140 | */ |
3141 | static void *thread_manage_clients(void *data) | |
3142 | { | |
139ac872 | 3143 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3144 | int sock_error; |
5eb91c98 | 3145 | uint32_t revents, nb_fd; |
273ea72c | 3146 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3147 | struct lttng_poll_event events; |
1d4b027a DG |
3148 | |
3149 | DBG("[thread] Manage client started"); | |
3150 | ||
f6a9efaa DG |
3151 | rcu_register_thread(); |
3152 | ||
769b7d7e DG |
3153 | health_register(HEALTH_TYPE_CMD); |
3154 | ||
6993eeb3 CB |
3155 | if (testpoint(thread_manage_clients)) { |
3156 | goto error_testpoint; | |
3157 | } | |
3158 | ||
227e824a | 3159 | health_code_update(); |
44a5e5eb | 3160 | |
1d4b027a DG |
3161 | ret = lttcomm_listen_unix_sock(client_sock); |
3162 | if (ret < 0) { | |
35df2755 | 3163 | goto error_listen; |
1d4b027a DG |
3164 | } |
3165 | ||
5eb91c98 DG |
3166 | /* |
3167 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3168 | * more will be added to this poll set. | |
3169 | */ | |
3170 | ret = create_thread_poll_set(&events, 2); | |
3171 | if (ret < 0) { | |
35df2755 | 3172 | goto error_create_poll; |
5eb91c98 | 3173 | } |
273ea72c | 3174 | |
5eb91c98 DG |
3175 | /* Add the application registration socket */ |
3176 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3177 | if (ret < 0) { | |
3178 | goto error; | |
3179 | } | |
273ea72c | 3180 | |
bbd973c2 DG |
3181 | /* |
3182 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3183 | */ |
3184 | if (opt_sig_parent) { | |
8db8d1dc | 3185 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3186 | } |
3187 | ||
6993eeb3 CB |
3188 | if (testpoint(thread_manage_clients_before_loop)) { |
3189 | goto error; | |
3190 | } | |
8ac94142 | 3191 | |
227e824a | 3192 | health_code_update(); |
44a5e5eb | 3193 | |
1d4b027a | 3194 | while (1) { |
1d4b027a | 3195 | DBG("Accepting client command ..."); |
273ea72c DG |
3196 | |
3197 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3198 | restart: |
227e824a | 3199 | health_poll_update(); |
5eb91c98 | 3200 | ret = lttng_poll_wait(&events, -1); |
227e824a | 3201 | health_poll_update(); |
273ea72c | 3202 | if (ret < 0) { |
88f2b785 MD |
3203 | /* |
3204 | * Restart interrupted system call. | |
3205 | */ | |
3206 | if (errno == EINTR) { | |
3207 | goto restart; | |
3208 | } | |
273ea72c DG |
3209 | goto error; |
3210 | } | |
3211 | ||
0d9c5d77 DG |
3212 | nb_fd = ret; |
3213 | ||
5eb91c98 DG |
3214 | for (i = 0; i < nb_fd; i++) { |
3215 | /* Fetch once the poll data */ | |
3216 | revents = LTTNG_POLL_GETEV(&events, i); | |
3217 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3218 | ||
227e824a | 3219 | health_code_update(); |
44a5e5eb | 3220 | |
5eb91c98 DG |
3221 | /* Thread quit pipe has been closed. Killing thread. */ |
3222 | ret = check_thread_quit_pipe(pollfd, revents); | |
3223 | if (ret) { | |
139ac872 MD |
3224 | err = 0; |
3225 | goto exit; | |
5eb91c98 DG |
3226 | } |
3227 | ||
3228 | /* Event on the registration socket */ | |
3229 | if (pollfd == client_sock) { | |
3230 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3231 | ERR("Client socket poll error"); | |
3232 | goto error; | |
3233 | } | |
3234 | } | |
3235 | } | |
3236 | ||
3237 | DBG("Wait for client response"); | |
3238 | ||
227e824a | 3239 | health_code_update(); |
44a5e5eb | 3240 | |
5eb91c98 DG |
3241 | sock = lttcomm_accept_unix_sock(client_sock); |
3242 | if (sock < 0) { | |
273ea72c | 3243 | goto error; |
273ea72c DG |
3244 | } |
3245 | ||
b662582b DG |
3246 | /* |
3247 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3248 | * show must go on. | |
3249 | */ | |
3250 | (void) utils_set_fd_cloexec(sock); | |
3251 | ||
be040666 DG |
3252 | /* Set socket option for credentials retrieval */ |
3253 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3254 | if (ret < 0) { | |
3255 | goto error; | |
3256 | } | |
3257 | ||
5eb91c98 | 3258 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3259 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3260 | if (cmd_ctx == NULL) { |
76d7553f | 3261 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3262 | goto error; |
5eb91c98 | 3263 | } |
1d4b027a | 3264 | |
5eb91c98 | 3265 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3266 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3267 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3268 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3269 | goto error; |
3270 | } | |
1d4b027a | 3271 | |
5eb91c98 DG |
3272 | cmd_ctx->llm = NULL; |
3273 | cmd_ctx->session = NULL; | |
1d4b027a | 3274 | |
227e824a | 3275 | health_code_update(); |
44a5e5eb | 3276 | |
5eb91c98 DG |
3277 | /* |
3278 | * Data is received from the lttng client. The struct | |
3279 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3280 | * the client. | |
3281 | */ | |
3282 | DBG("Receiving data from client ..."); | |
be040666 DG |
3283 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3284 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3285 | if (ret <= 0) { |
3286 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3287 | ret = close(sock); |
3288 | if (ret) { | |
3289 | PERROR("close"); | |
3290 | } | |
3291 | sock = -1; | |
a2c0da86 | 3292 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3293 | continue; |
3294 | } | |
1d4b027a | 3295 | |
227e824a | 3296 | health_code_update(); |
44a5e5eb | 3297 | |
5eb91c98 DG |
3298 | // TODO: Validate cmd_ctx including sanity check for |
3299 | // security purpose. | |
f7776ea7 | 3300 | |
f6a9efaa | 3301 | rcu_thread_online(); |
5eb91c98 DG |
3302 | /* |
3303 | * This function dispatch the work to the kernel or userspace tracer | |
3304 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3305 | * informations for the client. The command context struct contains | |
3306 | * everything this function may needs. | |
3307 | */ | |
53a80697 | 3308 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3309 | rcu_thread_offline(); |
5eb91c98 | 3310 | if (ret < 0) { |
53a80697 MD |
3311 | if (sock_error) { |
3312 | ret = close(sock); | |
3313 | if (ret) { | |
3314 | PERROR("close"); | |
3315 | } | |
3316 | sock = -1; | |
3317 | } | |
bbd973c2 | 3318 | /* |
5eb91c98 | 3319 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3320 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3321 | * (ENOMEM). Error detected but still accept |
3322 | * command, unless a socket error has been | |
3323 | * detected. | |
bbd973c2 | 3324 | */ |
bbd973c2 | 3325 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3326 | continue; |
3327 | } | |
d6e4fca4 | 3328 | |
227e824a | 3329 | health_code_update(); |
44a5e5eb | 3330 | |
54d01ffb DG |
3331 | DBG("Sending response (size: %d, retcode: %s)", |
3332 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3333 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3334 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3335 | if (ret < 0) { |
3336 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3337 | } |
1d4b027a | 3338 | |
5eb91c98 | 3339 | /* End of transmission */ |
76d7553f MD |
3340 | ret = close(sock); |
3341 | if (ret) { | |
3342 | PERROR("close"); | |
3343 | } | |
3344 | sock = -1; | |
be040666 DG |
3345 | |
3346 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3347 | |
227e824a | 3348 | health_code_update(); |
273ea72c DG |
3349 | } |
3350 | ||
139ac872 | 3351 | exit: |
5eb91c98 | 3352 | error: |
35df2755 CB |
3353 | if (sock >= 0) { |
3354 | ret = close(sock); | |
3355 | if (ret) { | |
3356 | PERROR("close"); | |
3357 | } | |
139ac872 | 3358 | } |
44a5e5eb | 3359 | |
35df2755 CB |
3360 | lttng_poll_clean(&events); |
3361 | clean_command_ctx(&cmd_ctx); | |
3362 | ||
3363 | error_listen: | |
3364 | error_create_poll: | |
6993eeb3 | 3365 | error_testpoint: |
273ea72c | 3366 | unlink(client_unix_sock_path); |
76d7553f MD |
3367 | if (client_sock >= 0) { |
3368 | ret = close(client_sock); | |
3369 | if (ret) { | |
3370 | PERROR("close"); | |
3371 | } | |
a4b35e07 | 3372 | } |
35df2755 CB |
3373 | |
3374 | if (err) { | |
227e824a | 3375 | health_error(); |
35df2755 | 3376 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3377 | } |
273ea72c | 3378 | |
769b7d7e | 3379 | health_unregister(); |
35df2755 CB |
3380 | |
3381 | DBG("Client thread dying"); | |
f6a9efaa DG |
3382 | |
3383 | rcu_unregister_thread(); | |
1d4b027a DG |
3384 | return NULL; |
3385 | } | |
3386 | ||
3387 | ||
fac6795d DG |
3388 | /* |
3389 | * usage function on stderr | |
3390 | */ | |
3391 | static void usage(void) | |
3392 | { | |
b716ce68 | 3393 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3394 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3395 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3396 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3397 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3398 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3399 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3400 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3401 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3402 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3403 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3404 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3405 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3406 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3407 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3408 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3409 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3410 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3411 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3412 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
3bd1e081 | 3413 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3414 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
fac6795d DG |
3415 | } |
3416 | ||
3417 | /* | |
3418 | * daemon argument parsing | |
3419 | */ | |
3420 | static int parse_args(int argc, char **argv) | |
3421 | { | |
3422 | int c; | |
3423 | ||
3424 | static struct option long_options[] = { | |
3425 | { "client-sock", 1, 0, 'c' }, | |
3426 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3427 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3428 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3429 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3430 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3431 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3432 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3433 | { "consumerd32-path", 1, 0, 'u' }, | |
3434 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3435 | { "consumerd64-path", 1, 0, 't' }, | |
3436 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3437 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3438 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3439 | { "help", 0, 0, 'h' }, |
3440 | { "group", 1, 0, 'g' }, | |
3441 | { "version", 0, 0, 'V' }, | |
75462a81 | 3442 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3443 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3444 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3445 | { "no-kernel", 0, 0, 'N' }, |
fac6795d DG |
3446 | { NULL, 0, 0, 0 } |
3447 | }; | |
3448 | ||
3449 | while (1) { | |
3450 | int option_index = 0; | |
4fba7219 | 3451 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t", |
54d01ffb | 3452 | long_options, &option_index); |
fac6795d DG |
3453 | if (c == -1) { |
3454 | break; | |
3455 | } | |
3456 | ||
3457 | switch (c) { | |
3458 | case 0: | |
3459 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3460 | if (optarg) { | |
3461 | fprintf(stderr, " with arg %s\n", optarg); | |
3462 | } | |
3463 | break; | |
b716ce68 | 3464 | case 'c': |
fac6795d DG |
3465 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3466 | break; | |
3467 | case 'a': | |
3468 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3469 | break; | |
3470 | case 'd': | |
3471 | opt_daemon = 1; | |
3472 | break; | |
3473 | case 'g': | |
fb09408a | 3474 | opt_tracing_group = optarg; |
fac6795d DG |
3475 | break; |
3476 | case 'h': | |
3477 | usage(); | |
3478 | exit(EXIT_FAILURE); | |
3479 | case 'V': | |
3480 | fprintf(stdout, "%s\n", VERSION); | |
3481 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3482 | case 'S': |
3483 | opt_sig_parent = 1; | |
3484 | break; | |
d6f42150 | 3485 | case 'E': |
3bd1e081 | 3486 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
3487 | break; |
3488 | case 'C': | |
3bd1e081 MD |
3489 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3490 | break; | |
3491 | case 'F': | |
7753dea8 | 3492 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
3493 | break; |
3494 | case 'D': | |
7753dea8 MD |
3495 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
3496 | break; | |
3497 | case 'H': | |
3498 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
3499 | break; | |
3500 | case 'G': | |
3501 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 3502 | break; |
4fba7219 DG |
3503 | case 'N': |
3504 | opt_no_kernel = 1; | |
3505 | break; | |
75462a81 | 3506 | case 'q': |
97e19046 | 3507 | lttng_opt_quiet = 1; |
75462a81 | 3508 | break; |
3f9947db | 3509 | case 'v': |
53086306 | 3510 | /* Verbose level can increase using multiple -v */ |
97e19046 | 3511 | lttng_opt_verbose += 1; |
3f9947db | 3512 | break; |
31f73cc9 | 3513 | case 'Z': |
3bd1e081 | 3514 | opt_verbose_consumer += 1; |
31f73cc9 | 3515 | break; |
fb09408a | 3516 | case 'u': |
fc7a59ce | 3517 | consumerd32_bin= optarg; |
ebaeda94 MD |
3518 | break; |
3519 | case 'U': | |
3520 | consumerd32_libdir = optarg; | |
7753dea8 MD |
3521 | break; |
3522 | case 't': | |
fc7a59ce | 3523 | consumerd64_bin = optarg; |
ebaeda94 MD |
3524 | break; |
3525 | case 'T': | |
3526 | consumerd64_libdir = optarg; | |
fb09408a | 3527 | break; |
fac6795d DG |
3528 | default: |
3529 | /* Unknown option or other error. | |
3530 | * Error is printed by getopt, just return */ | |
3531 | return -1; | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | return 0; | |
3536 | } | |
3537 | ||
3538 | /* | |
d063d709 | 3539 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
3540 | * apps_sock - The communication socket for all UST apps. |
3541 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 3542 | */ |
cf3af59e | 3543 | static int init_daemon_socket(void) |
fac6795d DG |
3544 | { |
3545 | int ret = 0; | |
3546 | mode_t old_umask; | |
3547 | ||
3548 | old_umask = umask(0); | |
3549 | ||
3550 | /* Create client tool unix socket */ | |
d6f42150 DG |
3551 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
3552 | if (client_sock < 0) { | |
3553 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
3554 | ret = -1; |
3555 | goto end; | |
3556 | } | |
3557 | ||
b662582b DG |
3558 | /* Set the cloexec flag */ |
3559 | ret = utils_set_fd_cloexec(client_sock); | |
3560 | if (ret < 0) { | |
3561 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
3562 | "Continuing but note that the consumer daemon will have a " | |
3563 | "reference to this socket on exec()", client_sock); | |
3564 | } | |
3565 | ||
fac6795d DG |
3566 | /* File permission MUST be 660 */ |
3567 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3568 | if (ret < 0) { | |
d6f42150 | 3569 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 3570 | PERROR("chmod"); |
fac6795d DG |
3571 | goto end; |
3572 | } | |
3573 | ||
3574 | /* Create the application unix socket */ | |
d6f42150 DG |
3575 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
3576 | if (apps_sock < 0) { | |
3577 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
3578 | ret = -1; |
3579 | goto end; | |
3580 | } | |
3581 | ||
b662582b DG |
3582 | /* Set the cloexec flag */ |
3583 | ret = utils_set_fd_cloexec(apps_sock); | |
3584 | if (ret < 0) { | |
3585 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
3586 | "Continuing but note that the consumer daemon will have a " | |
3587 | "reference to this socket on exec()", apps_sock); | |
3588 | } | |
3589 | ||
d6f42150 | 3590 | /* File permission MUST be 666 */ |
54d01ffb DG |
3591 | ret = chmod(apps_unix_sock_path, |
3592 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 3593 | if (ret < 0) { |
d6f42150 | 3594 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 3595 | PERROR("chmod"); |
fac6795d DG |
3596 | goto end; |
3597 | } | |
3598 | ||
b662582b DG |
3599 | DBG3("Session daemon client socket %d and application socket %d created", |
3600 | client_sock, apps_sock); | |
3601 | ||
fac6795d DG |
3602 | end: |
3603 | umask(old_umask); | |
3604 | return ret; | |
3605 | } | |
3606 | ||
3607 | /* | |
54d01ffb DG |
3608 | * Check if the global socket is available, and if a daemon is answering at the |
3609 | * other side. If yes, error is returned. | |
fac6795d | 3610 | */ |
cf3af59e | 3611 | static int check_existing_daemon(void) |
fac6795d | 3612 | { |
7d8234d9 | 3613 | /* Is there anybody out there ? */ |
099e26bd | 3614 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 3615 | return -EEXIST; |
099e26bd | 3616 | } |
b09c7c76 DG |
3617 | |
3618 | return 0; | |
fac6795d DG |
3619 | } |
3620 | ||
fac6795d | 3621 | /* |
d063d709 | 3622 | * Set the tracing group gid onto the client socket. |
5e16da05 | 3623 | * |
d063d709 | 3624 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 3625 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 3626 | */ |
be040666 | 3627 | static int set_permissions(char *rundir) |
fac6795d DG |
3628 | { |
3629 | int ret; | |
996b65c8 | 3630 | gid_t gid; |
fac6795d | 3631 | |
6775595e DG |
3632 | ret = allowed_group(); |
3633 | if (ret < 0) { | |
be040666 DG |
3634 | WARN("No tracing group detected"); |
3635 | ret = 0; | |
fac6795d DG |
3636 | goto end; |
3637 | } | |
3638 | ||
6775595e DG |
3639 | gid = ret; |
3640 | ||
d6f42150 | 3641 | /* Set lttng run dir */ |
be040666 | 3642 | ret = chown(rundir, 0, gid); |
d6f42150 | 3643 | if (ret < 0) { |
be040666 | 3644 | ERR("Unable to set group on %s", rundir); |
76d7553f | 3645 | PERROR("chown"); |
d6f42150 DG |
3646 | } |
3647 | ||
d1613cf5 | 3648 | /* Ensure tracing group can search the run dir */ |
61076f74 | 3649 | ret = chmod(rundir, S_IRWXU | S_IXGRP | S_IXOTH); |
d1613cf5 JN |
3650 | if (ret < 0) { |
3651 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 3652 | PERROR("chmod"); |
d1613cf5 JN |
3653 | } |
3654 | ||
d6f42150 | 3655 | /* lttng client socket path */ |
996b65c8 | 3656 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 3657 | if (ret < 0) { |
d6f42150 | 3658 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 3659 | PERROR("chown"); |
d6f42150 DG |
3660 | } |
3661 | ||
3bd1e081 MD |
3662 | /* kconsumer error socket path */ |
3663 | ret = chown(kconsumer_data.err_unix_sock_path, 0, gid); | |
d6f42150 | 3664 | if (ret < 0) { |
3bd1e081 | 3665 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 3666 | PERROR("chown"); |
3bd1e081 MD |
3667 | } |
3668 | ||
7753dea8 MD |
3669 | /* 64-bit ustconsumer error socket path */ |
3670 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, gid); | |
3671 | if (ret < 0) { | |
3672 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 3673 | PERROR("chown"); |
7753dea8 MD |
3674 | } |
3675 | ||
3676 | /* 32-bit ustconsumer compat32 error socket path */ | |
3677 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, gid); | |
3bd1e081 | 3678 | if (ret < 0) { |
7753dea8 | 3679 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 3680 | PERROR("chown"); |
fac6795d DG |
3681 | } |
3682 | ||
d6f42150 | 3683 | DBG("All permissions are set"); |
e07ae692 | 3684 | |
fac6795d DG |
3685 | end: |
3686 | return ret; | |
3687 | } | |
3688 | ||
d6f42150 | 3689 | /* |
d063d709 | 3690 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 3691 | */ |
67e40797 | 3692 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
3693 | { |
3694 | int ret; | |
3695 | ||
67e40797 DG |
3696 | DBG3("Creating LTTng run directory: %s", rundir); |
3697 | ||
d1613cf5 | 3698 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 3699 | if (ret < 0) { |
b1f11e69 | 3700 | if (errno != EEXIST) { |
67e40797 | 3701 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
3702 | goto error; |
3703 | } else { | |
3704 | ret = 0; | |
3705 | } | |
d6f42150 DG |
3706 | } |
3707 | ||
3708 | error: | |
3709 | return ret; | |
3710 | } | |
3711 | ||
3712 | /* | |
d063d709 DG |
3713 | * Setup sockets and directory needed by the kconsumerd communication with the |
3714 | * session daemon. | |
d6f42150 | 3715 | */ |
67e40797 DG |
3716 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
3717 | const char *rundir) | |
d6f42150 DG |
3718 | { |
3719 | int ret; | |
67e40797 | 3720 | char path[PATH_MAX]; |
d6f42150 | 3721 | |
67e40797 | 3722 | switch (consumer_data->type) { |
7753dea8 | 3723 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 3724 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
3725 | break; |
3726 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 3727 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
3728 | break; |
3729 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 3730 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
3731 | break; |
3732 | default: | |
3733 | ERR("Consumer type unknown"); | |
3734 | ret = -EINVAL; | |
3735 | goto error; | |
d6f42150 DG |
3736 | } |
3737 | ||
67e40797 DG |
3738 | DBG2("Creating consumer directory: %s", path); |
3739 | ||
d1613cf5 | 3740 | ret = mkdir(path, S_IRWXU); |
d6f42150 | 3741 | if (ret < 0) { |
6beb2242 | 3742 | if (errno != EEXIST) { |
f11e84c2 | 3743 | PERROR("mkdir"); |
3bd1e081 | 3744 | ERR("Failed to create %s", path); |
6beb2242 DG |
3745 | goto error; |
3746 | } | |
f11e84c2 | 3747 | ret = -1; |
d6f42150 DG |
3748 | } |
3749 | ||
3750 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
3751 | consumer_data->err_sock = |
3752 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
3753 | if (consumer_data->err_sock < 0) { | |
3754 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
3755 | ret = -1; |
3756 | goto error; | |
3757 | } | |
3758 | ||
3759 | /* File permission MUST be 660 */ | |
3bd1e081 | 3760 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 3761 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 3762 | if (ret < 0) { |
3bd1e081 | 3763 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 3764 | PERROR("chmod"); |
d6f42150 DG |
3765 | goto error; |
3766 | } | |
3767 | ||
3768 | error: | |
3769 | return ret; | |
3770 | } | |
3771 | ||
fac6795d | 3772 | /* |
d063d709 | 3773 | * Signal handler for the daemon |
cf3af59e | 3774 | * |
54d01ffb DG |
3775 | * Simply stop all worker threads, leaving main() return gracefully after |
3776 | * joining all threads and calling cleanup(). | |
fac6795d DG |
3777 | */ |
3778 | static void sighandler(int sig) | |
3779 | { | |
3780 | switch (sig) { | |
cf3af59e | 3781 | case SIGPIPE: |
af87c45a | 3782 | DBG("SIGPIPE caught"); |
cf3af59e MD |
3783 | return; |
3784 | case SIGINT: | |
af87c45a | 3785 | DBG("SIGINT caught"); |
cf3af59e MD |
3786 | stop_threads(); |
3787 | break; | |
3788 | case SIGTERM: | |
af87c45a | 3789 | DBG("SIGTERM caught"); |
cf3af59e MD |
3790 | stop_threads(); |
3791 | break; | |
3792 | default: | |
3793 | break; | |
fac6795d | 3794 | } |
fac6795d DG |
3795 | } |
3796 | ||
3797 | /* | |
d063d709 | 3798 | * Setup signal handler for : |
1d4b027a | 3799 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 3800 | */ |
1d4b027a | 3801 | static int set_signal_handler(void) |
fac6795d | 3802 | { |
1d4b027a DG |
3803 | int ret = 0; |
3804 | struct sigaction sa; | |
3805 | sigset_t sigset; | |
fac6795d | 3806 | |
1d4b027a | 3807 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 3808 | PERROR("sigemptyset"); |
1d4b027a DG |
3809 | return ret; |
3810 | } | |
d6f42150 | 3811 | |
1d4b027a DG |
3812 | sa.sa_handler = sighandler; |
3813 | sa.sa_mask = sigset; | |
3814 | sa.sa_flags = 0; | |
3815 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 3816 | PERROR("sigaction"); |
1d4b027a | 3817 | return ret; |
d6f42150 DG |
3818 | } |
3819 | ||
1d4b027a | 3820 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 3821 | PERROR("sigaction"); |
1d4b027a | 3822 | return ret; |
d6f42150 | 3823 | } |
aaf26714 | 3824 | |
1d4b027a | 3825 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 3826 | PERROR("sigaction"); |
1d4b027a | 3827 | return ret; |
8c0faa1d DG |
3828 | } |
3829 | ||
1d4b027a DG |
3830 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
3831 | ||
3832 | return ret; | |
fac6795d DG |
3833 | } |
3834 | ||
f3ed775e | 3835 | /* |
d063d709 DG |
3836 | * Set open files limit to unlimited. This daemon can open a large number of |
3837 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
3838 | */ |
3839 | static void set_ulimit(void) | |
3840 | { | |
3841 | int ret; | |
3842 | struct rlimit lim; | |
3843 | ||
a88df331 | 3844 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
3845 | lim.rlim_cur = 65535; |
3846 | lim.rlim_max = 65535; | |
3847 | ||
3848 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
3849 | if (ret < 0) { | |
76d7553f | 3850 | PERROR("failed to set open files limit"); |
f3ed775e DG |
3851 | } |
3852 | } | |
3853 | ||
fac6795d DG |
3854 | /* |
3855 | * main | |
3856 | */ | |
3857 | int main(int argc, char **argv) | |
3858 | { | |
fac6795d DG |
3859 | int ret = 0; |
3860 | void *status; | |
ae9e45b3 | 3861 | const char *home_path, *env_app_timeout; |
fac6795d | 3862 | |
335a95b7 MD |
3863 | init_kernel_workarounds(); |
3864 | ||
f6a9efaa DG |
3865 | rcu_register_thread(); |
3866 | ||
7753dea8 | 3867 | setup_consumerd_path(); |
fb09408a | 3868 | |
fac6795d DG |
3869 | /* Parse arguments */ |
3870 | progname = argv[0]; | |
c617c0c6 | 3871 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 3872 | goto error; |
fac6795d DG |
3873 | } |
3874 | ||
3875 | /* Daemonize */ | |
3876 | if (opt_daemon) { | |
ceed52b5 MD |
3877 | int i; |
3878 | ||
3879 | /* | |
3880 | * fork | |
3881 | * child: setsid, close FD 0, 1, 2, chdir / | |
3882 | * parent: exit (if fork is successful) | |
3883 | */ | |
53094c05 DG |
3884 | ret = daemon(0, 0); |
3885 | if (ret < 0) { | |
76d7553f | 3886 | PERROR("daemon"); |
cf3af59e | 3887 | goto error; |
53094c05 | 3888 | } |
ceed52b5 MD |
3889 | /* |
3890 | * We are in the child. Make sure all other file | |
3891 | * descriptors are closed, in case we are called with | |
3892 | * more opened file descriptors than the standard ones. | |
3893 | */ | |
3894 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
3895 | (void) close(i); | |
3896 | } | |
3897 | } | |
3898 | ||
3899 | /* Create thread quit pipe */ | |
3900 | if ((ret = init_thread_quit_pipe()) < 0) { | |
3901 | goto error; | |
fac6795d DG |
3902 | } |
3903 | ||
3904 | /* Check if daemon is UID = 0 */ | |
3905 | is_root = !getuid(); | |
3906 | ||
fac6795d | 3907 | if (is_root) { |
990570ed | 3908 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
3909 | |
3910 | /* Create global run dir with root access */ | |
3911 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 3912 | if (ret < 0) { |
cf3af59e | 3913 | goto error; |
d6f42150 DG |
3914 | } |
3915 | ||
fac6795d | 3916 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
3917 | snprintf(apps_unix_sock_path, PATH_MAX, |
3918 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
3919 | } |
3920 | ||
3921 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
3922 | snprintf(client_unix_sock_path, PATH_MAX, |
3923 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
3924 | } | |
0fdd1e2c DG |
3925 | |
3926 | /* Set global SHM for ust */ | |
3927 | if (strlen(wait_shm_path) == 0) { | |
3928 | snprintf(wait_shm_path, PATH_MAX, | |
3929 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
3930 | } | |
67e40797 | 3931 | |
44a5e5eb DG |
3932 | if (strlen(health_unix_sock_path) == 0) { |
3933 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3934 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
3935 | } | |
3936 | ||
67e40797 DG |
3937 | /* Setup kernel consumerd path */ |
3938 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 3939 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 3940 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 3941 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
3942 | |
3943 | DBG2("Kernel consumer err path: %s", | |
3944 | kconsumer_data.err_unix_sock_path); | |
3945 | DBG2("Kernel consumer cmd path: %s", | |
3946 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 3947 | } else { |
b082db07 DG |
3948 | home_path = get_home_dir(); |
3949 | if (home_path == NULL) { | |
273ea72c DG |
3950 | /* TODO: Add --socket PATH option */ |
3951 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
3952 | ret = -EPERM; |
3953 | goto error; | |
b082db07 DG |
3954 | } |
3955 | ||
67e40797 DG |
3956 | /* |
3957 | * Create rundir from home path. This will create something like | |
3958 | * $HOME/.lttng | |
3959 | */ | |
990570ed | 3960 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
3961 | if (ret < 0) { |
3962 | ret = -ENOMEM; | |
3963 | goto error; | |
3964 | } | |
3965 | ||
3966 | ret = create_lttng_rundir(rundir); | |
3967 | if (ret < 0) { | |
3968 | goto error; | |
3969 | } | |
3970 | ||
fac6795d | 3971 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 3972 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 3973 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
3974 | } |
3975 | ||
3976 | /* Set the cli tool unix socket path */ | |
3977 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 3978 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 3979 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 3980 | } |
0fdd1e2c DG |
3981 | |
3982 | /* Set global SHM for ust */ | |
3983 | if (strlen(wait_shm_path) == 0) { | |
3984 | snprintf(wait_shm_path, PATH_MAX, | |
3985 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, geteuid()); | |
3986 | } | |
44a5e5eb DG |
3987 | |
3988 | /* Set health check Unix path */ | |
3989 | if (strlen(health_unix_sock_path) == 0) { | |
3990 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
3991 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
3992 | } | |
fac6795d DG |
3993 | } |
3994 | ||
5c827ce0 DG |
3995 | /* Set consumer initial state */ |
3996 | kernel_consumerd_state = CONSUMER_STOPPED; | |
3997 | ust_consumerd_state = CONSUMER_STOPPED; | |
3998 | ||
847177cd DG |
3999 | DBG("Client socket path %s", client_unix_sock_path); |
4000 | DBG("Application socket path %s", apps_unix_sock_path); | |
67e40797 DG |
4001 | DBG("LTTng run directory path: %s", rundir); |
4002 | ||
4003 | /* 32 bits consumerd path setup */ | |
4004 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4005 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4006 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4007 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4008 | |
4009 | DBG2("UST consumer 32 bits err path: %s", | |
4010 | ustconsumer32_data.err_unix_sock_path); | |
4011 | DBG2("UST consumer 32 bits cmd path: %s", | |
4012 | ustconsumer32_data.cmd_unix_sock_path); | |
4013 | ||
4014 | /* 64 bits consumerd path setup */ | |
4015 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4016 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4017 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4018 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4019 | |
4020 | DBG2("UST consumer 64 bits err path: %s", | |
4021 | ustconsumer64_data.err_unix_sock_path); | |
4022 | DBG2("UST consumer 64 bits cmd path: %s", | |
4023 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4024 | |
273ea72c | 4025 | /* |
7d8234d9 | 4026 | * See if daemon already exist. |
fac6795d | 4027 | */ |
7d8234d9 | 4028 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4029 | ERR("Already running daemon.\n"); |
273ea72c | 4030 | /* |
cf3af59e MD |
4031 | * We do not goto exit because we must not cleanup() |
4032 | * because a daemon is already running. | |
ab118b20 | 4033 | */ |
cf3af59e | 4034 | goto error; |
a88df331 DG |
4035 | } |
4036 | ||
1427f9b2 DG |
4037 | /* |
4038 | * Init UST app hash table. Alloc hash table before this point since | |
4039 | * cleanup() can get called after that point. | |
4040 | */ | |
4041 | ust_app_ht_alloc(); | |
4042 | ||
54d01ffb | 4043 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4044 | |
4045 | /* | |
4046 | * These actions must be executed as root. We do that *after* setting up | |
4047 | * the sockets path because we MUST make the check for another daemon using | |
4048 | * those paths *before* trying to set the kernel consumer sockets and init | |
4049 | * kernel tracer. | |
4050 | */ | |
4051 | if (is_root) { | |
67e40797 | 4052 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4053 | if (ret < 0) { |
4054 | goto exit; | |
4055 | } | |
4056 | ||
a88df331 | 4057 | /* Setup kernel tracer */ |
4fba7219 DG |
4058 | if (!opt_no_kernel) { |
4059 | init_kernel_tracer(); | |
4060 | } | |
a88df331 DG |
4061 | |
4062 | /* Set ulimit for open files */ | |
4063 | set_ulimit(); | |
fac6795d | 4064 | } |
4063050c MD |
4065 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4066 | lttng_fd_init(); | |
fac6795d | 4067 | |
67e40797 DG |
4068 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4069 | if (ret < 0) { | |
4070 | goto exit; | |
4071 | } | |
4072 | ||
4073 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4074 | if (ret < 0) { | |
4075 | goto exit; | |
4076 | } | |
4077 | ||
cf3af59e MD |
4078 | if ((ret = set_signal_handler()) < 0) { |
4079 | goto exit; | |
fac6795d DG |
4080 | } |
4081 | ||
d6f42150 | 4082 | /* Setup the needed unix socket */ |
cf3af59e MD |
4083 | if ((ret = init_daemon_socket()) < 0) { |
4084 | goto exit; | |
fac6795d DG |
4085 | } |
4086 | ||
4087 | /* Set credentials to socket */ | |
be040666 | 4088 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4089 | goto exit; |
fac6795d DG |
4090 | } |
4091 | ||
5b8719f5 DG |
4092 | /* Get parent pid if -S, --sig-parent is specified. */ |
4093 | if (opt_sig_parent) { | |
4094 | ppid = getppid(); | |
4095 | } | |
4096 | ||
7a485870 | 4097 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4098 | if (is_root && !opt_no_kernel) { |
4099 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4100 | goto exit; | |
4101 | } | |
7a485870 DG |
4102 | } |
4103 | ||
099e26bd | 4104 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4105 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4106 | goto exit; |
4107 | } | |
4108 | ||
4109 | /* Init UST command queue. */ | |
4110 | cds_wfq_init(&ust_cmd_queue.queue); | |
4111 | ||
273ea72c | 4112 | /* |
54d01ffb DG |
4113 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4114 | * statically declared in session.c | |
273ea72c | 4115 | */ |
54d01ffb | 4116 | session_list_ptr = session_get_list(); |
b5541356 | 4117 | |
5eb91c98 DG |
4118 | /* Set up max poll set size */ |
4119 | lttng_poll_set_max_size(); | |
4120 | ||
2f77fc4b | 4121 | cmd_init(); |
00e2e675 | 4122 | |
ae9e45b3 DG |
4123 | /* Check for the application socket timeout env variable. */ |
4124 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4125 | if (env_app_timeout) { | |
4126 | app_socket_timeout = atoi(env_app_timeout); | |
4127 | } else { | |
4128 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4129 | } | |
4130 | ||
44a5e5eb DG |
4131 | /* Create thread to manage the client socket */ |
4132 | ret = pthread_create(&health_thread, NULL, | |
4133 | thread_manage_health, (void *) NULL); | |
4134 | if (ret != 0) { | |
4135 | PERROR("pthread_create health"); | |
4136 | goto exit_health; | |
4137 | } | |
4138 | ||
cf3af59e | 4139 | /* Create thread to manage the client socket */ |
099e26bd DG |
4140 | ret = pthread_create(&client_thread, NULL, |
4141 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4142 | if (ret != 0) { |
76d7553f | 4143 | PERROR("pthread_create clients"); |
cf3af59e MD |
4144 | goto exit_client; |
4145 | } | |
fac6795d | 4146 | |
099e26bd DG |
4147 | /* Create thread to dispatch registration */ |
4148 | ret = pthread_create(&dispatch_thread, NULL, | |
4149 | thread_dispatch_ust_registration, (void *) NULL); | |
4150 | if (ret != 0) { | |
76d7553f | 4151 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4152 | goto exit_dispatch; |
4153 | } | |
4154 | ||
4155 | /* Create thread to manage application registration. */ | |
4156 | ret = pthread_create(®_apps_thread, NULL, | |
4157 | thread_registration_apps, (void *) NULL); | |
4158 | if (ret != 0) { | |
76d7553f | 4159 | PERROR("pthread_create registration"); |
099e26bd DG |
4160 | goto exit_reg_apps; |
4161 | } | |
4162 | ||
cf3af59e | 4163 | /* Create thread to manage application socket */ |
54d01ffb DG |
4164 | ret = pthread_create(&apps_thread, NULL, |
4165 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4166 | if (ret != 0) { |
76d7553f | 4167 | PERROR("pthread_create apps"); |
cf3af59e MD |
4168 | goto exit_apps; |
4169 | } | |
fac6795d | 4170 | |
6620da75 DG |
4171 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4172 | if (is_root && !opt_no_kernel) { | |
4173 | /* Create kernel thread to manage kernel event */ | |
4174 | ret = pthread_create(&kernel_thread, NULL, | |
4175 | thread_manage_kernel, (void *) NULL); | |
4176 | if (ret != 0) { | |
4177 | PERROR("pthread_create kernel"); | |
4178 | goto exit_kernel; | |
4179 | } | |
7a485870 | 4180 | |
6620da75 DG |
4181 | ret = pthread_join(kernel_thread, &status); |
4182 | if (ret != 0) { | |
4183 | PERROR("pthread_join"); | |
4184 | goto error; /* join error, exit without cleanup */ | |
4185 | } | |
fac6795d DG |
4186 | } |
4187 | ||
cf3af59e MD |
4188 | exit_kernel: |
4189 | ret = pthread_join(apps_thread, &status); | |
4190 | if (ret != 0) { | |
76d7553f | 4191 | PERROR("pthread_join"); |
cf3af59e MD |
4192 | goto error; /* join error, exit without cleanup */ |
4193 | } | |
fac6795d | 4194 | |
cf3af59e | 4195 | exit_apps: |
099e26bd DG |
4196 | ret = pthread_join(reg_apps_thread, &status); |
4197 | if (ret != 0) { | |
76d7553f | 4198 | PERROR("pthread_join"); |
099e26bd DG |
4199 | goto error; /* join error, exit without cleanup */ |
4200 | } | |
4201 | ||
4202 | exit_reg_apps: | |
4203 | ret = pthread_join(dispatch_thread, &status); | |
4204 | if (ret != 0) { | |
76d7553f | 4205 | PERROR("pthread_join"); |
099e26bd DG |
4206 | goto error; /* join error, exit without cleanup */ |
4207 | } | |
4208 | ||
4209 | exit_dispatch: | |
cf3af59e MD |
4210 | ret = pthread_join(client_thread, &status); |
4211 | if (ret != 0) { | |
76d7553f | 4212 | PERROR("pthread_join"); |
cf3af59e MD |
4213 | goto error; /* join error, exit without cleanup */ |
4214 | } | |
4215 | ||
3bd1e081 | 4216 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4217 | if (ret != 0) { |
76d7553f | 4218 | PERROR("join_consumer"); |
cf3af59e MD |
4219 | goto error; /* join error, exit without cleanup */ |
4220 | } | |
a88df331 | 4221 | |
06f525de DG |
4222 | ret = join_consumer_thread(&ustconsumer32_data); |
4223 | if (ret != 0) { | |
4224 | PERROR("join_consumer ust32"); | |
4225 | goto error; /* join error, exit without cleanup */ | |
4226 | } | |
4227 | ||
4228 | ret = join_consumer_thread(&ustconsumer64_data); | |
4229 | if (ret != 0) { | |
4230 | PERROR("join_consumer ust64"); | |
4231 | goto error; /* join error, exit without cleanup */ | |
4232 | } | |
4233 | ||
cf3af59e | 4234 | exit_client: |
06f525de DG |
4235 | ret = pthread_join(health_thread, &status); |
4236 | if (ret != 0) { | |
4237 | PERROR("pthread_join health thread"); | |
4238 | goto error; /* join error, exit without cleanup */ | |
4239 | } | |
4240 | ||
44a5e5eb | 4241 | exit_health: |
a88df331 | 4242 | exit: |
cf3af59e MD |
4243 | /* |
4244 | * cleanup() is called when no other thread is running. | |
4245 | */ | |
f6a9efaa | 4246 | rcu_thread_online(); |
cf3af59e | 4247 | cleanup(); |
f6a9efaa DG |
4248 | rcu_thread_offline(); |
4249 | rcu_unregister_thread(); | |
67e40797 | 4250 | if (!ret) { |
cf3af59e | 4251 | exit(EXIT_SUCCESS); |
67e40797 | 4252 | } |
cf3af59e | 4253 | error: |
5e16da05 | 4254 | exit(EXIT_FAILURE); |
fac6795d | 4255 | } |