Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
3bd1e081 | 40 | #include <config.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
db758600 DG |
44 | #include <common/defaults.h> |
45 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 46 | #include <common/futex.h> |
00e2e675 | 47 | #include <common/relayd/relayd.h> |
81b86775 | 48 | #include <common/utils.h> |
3ccdf997 | 49 | #include <common/daemonize.h> |
26296c48 | 50 | #include <common/config/config.h> |
fac6795d | 51 | |
10a8a223 | 52 | #include "lttng-sessiond.h" |
7972aab2 | 53 | #include "buffer-registry.h" |
54d01ffb | 54 | #include "channel.h" |
2f77fc4b | 55 | #include "cmd.h" |
00e2e675 | 56 | #include "consumer.h" |
099e26bd | 57 | #include "context.h" |
54d01ffb | 58 | #include "event.h" |
4771f025 | 59 | #include "kernel.h" |
f1e16794 | 60 | #include "kernel-consumer.h" |
096102bd | 61 | #include "modprobe.h" |
0fdd1e2c | 62 | #include "shm.h" |
1e307fab | 63 | #include "ust-ctl.h" |
00e2e675 | 64 | #include "ust-consumer.h" |
8e68d1c8 | 65 | #include "utils.h" |
4063050c | 66 | #include "fd-limit.h" |
8782cc74 | 67 | #include "health-sessiond.h" |
8ac94142 | 68 | #include "testpoint.h" |
d0b96690 | 69 | #include "ust-thread.h" |
4d076222 | 70 | #include "jul-thread.h" |
fac6795d | 71 | |
ebaeda94 MD |
72 | #define CONSUMERD_FILE "lttng-consumerd" |
73 | ||
fac6795d | 74 | const char *progname; |
6c71277b | 75 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
76 | static int tracing_group_name_override; |
77 | static char *opt_pidfile; | |
5b8719f5 | 78 | static int opt_sig_parent; |
97e19046 | 79 | static int opt_verbose_consumer; |
72dd7491 | 80 | static int opt_daemon, opt_background; |
4fba7219 | 81 | static int opt_no_kernel; |
fac6795d | 82 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 83 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 84 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 85 | static char *rundir; |
3bd1e081 | 86 | |
0bb7724a DG |
87 | /* Set to 1 when a SIGUSR1 signal is received. */ |
88 | static int recv_child_signal; | |
89 | ||
a23ec3a7 DG |
90 | /* |
91 | * Consumer daemon specific control data. Every value not initialized here is | |
92 | * set to 0 by the static definition. | |
93 | */ | |
3bd1e081 MD |
94 | static struct consumer_data kconsumer_data = { |
95 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
96 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
97 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
98 | .err_sock = -1, |
99 | .cmd_sock = -1, | |
173af62f DG |
100 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
101 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
102 | .cond = PTHREAD_COND_INITIALIZER, |
103 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 104 | }; |
7753dea8 MD |
105 | static struct consumer_data ustconsumer64_data = { |
106 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
107 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
108 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
109 | .err_sock = -1, |
110 | .cmd_sock = -1, | |
173af62f DG |
111 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
112 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
113 | .cond = PTHREAD_COND_INITIALIZER, |
114 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
115 | }; |
116 | static struct consumer_data ustconsumer32_data = { | |
117 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
118 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
119 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
120 | .err_sock = -1, |
121 | .cmd_sock = -1, | |
173af62f DG |
122 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
123 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
124 | .cond = PTHREAD_COND_INITIALIZER, |
125 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
126 | }; |
127 | ||
26296c48 JG |
128 | /* Command line options */ |
129 | static const struct option long_options[] = { | |
130 | { "client-sock", 1, 0, 'c' }, | |
131 | { "apps-sock", 1, 0, 'a' }, | |
132 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, | |
133 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
134 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, | |
135 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
136 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, | |
137 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
138 | { "consumerd32-path", 1, 0, 'u' }, | |
139 | { "consumerd32-libdir", 1, 0, 'U' }, | |
140 | { "consumerd64-path", 1, 0, 't' }, | |
141 | { "consumerd64-libdir", 1, 0, 'T' }, | |
142 | { "daemonize", 0, 0, 'd' }, | |
72dd7491 | 143 | { "background", 0, 0, 'b' }, |
26296c48 JG |
144 | { "sig-parent", 0, 0, 'S' }, |
145 | { "help", 0, 0, 'h' }, | |
146 | { "group", 1, 0, 'g' }, | |
147 | { "version", 0, 0, 'V' }, | |
148 | { "quiet", 0, 0, 'q' }, | |
149 | { "verbose", 0, 0, 'v' }, | |
150 | { "verbose-consumer", 0, 0, 'Z' }, | |
151 | { "no-kernel", 0, 0, 'N' }, | |
152 | { "pidfile", 1, 0, 'p' }, | |
153 | { "jul-tcp-port", 1, 0, 'J' }, | |
154 | { "config", 1, 0, 'f' }, | |
155 | { NULL, 0, 0, 0 } | |
156 | }; | |
157 | ||
158 | /* Command line options to ignore from configuration file */ | |
159 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
160 | ||
26c9d55e | 161 | /* Shared between threads */ |
099e26bd | 162 | static int dispatch_thread_exit; |
fac6795d | 163 | |
54d01ffb DG |
164 | /* Global application Unix socket path */ |
165 | static char apps_unix_sock_path[PATH_MAX]; | |
166 | /* Global client Unix socket path */ | |
167 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
168 | /* global wait shm path for UST */ |
169 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
170 | /* Global health check unix path */ |
171 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 172 | |
1d4b027a | 173 | /* Sockets and FDs */ |
a4b35e07 MD |
174 | static int client_sock = -1; |
175 | static int apps_sock = -1; | |
2f77fc4b | 176 | int kernel_tracer_fd = -1; |
76d7553f | 177 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 178 | |
273ea72c DG |
179 | /* |
180 | * Quit pipe for all threads. This permits a single cancellation point | |
181 | * for all threads when receiving an event on the pipe. | |
182 | */ | |
76d7553f | 183 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 184 | |
099e26bd DG |
185 | /* |
186 | * This pipe is used to inform the thread managing application communication | |
187 | * that a command is queued and ready to be processed. | |
188 | */ | |
76d7553f | 189 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 190 | |
d0b96690 DG |
191 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
192 | ||
1d4b027a | 193 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 194 | static pthread_t apps_thread; |
d0b96690 | 195 | static pthread_t apps_notify_thread; |
099e26bd | 196 | static pthread_t reg_apps_thread; |
1d4b027a | 197 | static pthread_t client_thread; |
7a485870 | 198 | static pthread_t kernel_thread; |
099e26bd | 199 | static pthread_t dispatch_thread; |
44a5e5eb | 200 | static pthread_t health_thread; |
0b2dc8df | 201 | static pthread_t ht_cleanup_thread; |
4d076222 | 202 | static pthread_t jul_reg_thread; |
5eb91c98 | 203 | |
099e26bd DG |
204 | /* |
205 | * UST registration command queue. This queue is tied with a futex and uses a N | |
206 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
207 | * | |
208 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
209 | * this queue and the wait/wake scheme. | |
210 | */ | |
211 | static struct ust_cmd_queue ust_cmd_queue; | |
212 | ||
b5541356 DG |
213 | /* |
214 | * Pointer initialized before thread creation. | |
215 | * | |
216 | * This points to the tracing session list containing the session count and a | |
217 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
218 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 219 | * |
d063d709 | 220 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 221 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
222 | */ |
223 | static struct ltt_session_list *session_list_ptr; | |
224 | ||
7753dea8 MD |
225 | int ust_consumerd64_fd = -1; |
226 | int ust_consumerd32_fd = -1; | |
227 | ||
fb6f1fa2 YB |
228 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
229 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
230 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
231 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
232 | static int consumerd32_bin_override; |
233 | static int consumerd64_bin_override; | |
234 | static int consumerd32_libdir_override; | |
235 | static int consumerd64_libdir_override; | |
fb09408a | 236 | |
2f77fc4b DG |
237 | static const char *module_proc_lttng = "/proc/lttng"; |
238 | ||
5c827ce0 DG |
239 | /* |
240 | * Consumer daemon state which is changed when spawning it, killing it or in | |
241 | * case of a fatal error. | |
242 | */ | |
243 | enum consumerd_state { | |
244 | CONSUMER_STARTED = 1, | |
245 | CONSUMER_STOPPED = 2, | |
246 | CONSUMER_ERROR = 3, | |
247 | }; | |
248 | ||
249 | /* | |
250 | * This consumer daemon state is used to validate if a client command will be | |
251 | * able to reach the consumer. If not, the client is informed. For instance, | |
252 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
253 | * error to the client. | |
254 | * | |
255 | * The following example shows a possible race condition of this scheme: | |
256 | * | |
257 | * consumer thread error happens | |
258 | * client cmd arrives | |
259 | * client cmd checks state -> still OK | |
260 | * consumer thread exit, sets error | |
261 | * client cmd try to talk to consumer | |
262 | * ... | |
263 | * | |
264 | * However, since the consumer is a different daemon, we have no way of making | |
265 | * sure the command will reach it safely even with this state flag. This is why | |
266 | * we consider that up to the state validation during command processing, the | |
267 | * command is safe. After that, we can not guarantee the correctness of the | |
268 | * client request vis-a-vis the consumer. | |
269 | */ | |
270 | static enum consumerd_state ust_consumerd_state; | |
271 | static enum consumerd_state kernel_consumerd_state; | |
272 | ||
ae9e45b3 DG |
273 | /* |
274 | * Socket timeout for receiving and sending in seconds. | |
275 | */ | |
276 | static int app_socket_timeout; | |
277 | ||
12744796 DG |
278 | /* Set in main() with the current page size. */ |
279 | long page_size; | |
280 | ||
8782cc74 MD |
281 | /* Application health monitoring */ |
282 | struct health_app *health_sessiond; | |
283 | ||
4d076222 DG |
284 | /* JUL TCP port for registration. Used by the JUL thread. */ |
285 | unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT; | |
286 | ||
26296c48 JG |
287 | const char * const config_section_name = "sessiond"; |
288 | ||
97bc1426 MD |
289 | /* |
290 | * Whether sessiond is ready for commands/health check requests. | |
291 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
292 | * lttng_sessiond_notify_ready(). | |
293 | */ | |
294 | #define NR_LTTNG_SESSIOND_READY 2 | |
295 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; | |
296 | ||
297 | /* Notify parents that we are ready for cmd and health check */ | |
298 | static | |
299 | void lttng_sessiond_notify_ready(void) | |
300 | { | |
301 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
302 | /* | |
303 | * Notify parent pid that we are ready to accept command | |
304 | * for client side. This ppid is the one from the | |
305 | * external process that spawned us. | |
306 | */ | |
307 | if (opt_sig_parent) { | |
308 | kill(ppid, SIGUSR1); | |
309 | } | |
310 | ||
311 | /* | |
312 | * Notify the parent of the fork() process that we are | |
313 | * ready. | |
314 | */ | |
72dd7491 | 315 | if (opt_daemon || opt_background) { |
97bc1426 MD |
316 | kill(child_ppid, SIGUSR1); |
317 | } | |
318 | } | |
319 | } | |
320 | ||
fb09408a | 321 | static |
7753dea8 | 322 | void setup_consumerd_path(void) |
fb09408a | 323 | { |
fc7a59ce | 324 | const char *bin, *libdir; |
fb09408a | 325 | |
7753dea8 MD |
326 | /* |
327 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
328 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
329 | * has not been defined. | |
7753dea8 | 330 | */ |
ebaeda94 | 331 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
332 | if (!consumerd32_bin[0]) { |
333 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
334 | } |
335 | if (!consumerd32_libdir[0]) { | |
336 | consumerd32_libdir = INSTALL_LIB_PATH; | |
337 | } | |
338 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
339 | if (!consumerd64_bin[0]) { |
340 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 341 | } |
ebaeda94 MD |
342 | if (!consumerd64_libdir[0]) { |
343 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
344 | } |
345 | #else | |
346 | #error "Unknown bitness" | |
347 | #endif | |
348 | ||
fb09408a MD |
349 | /* |
350 | * runtime env. var. overrides the build default. | |
351 | */ | |
fc7a59ce AM |
352 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
353 | if (bin) { | |
354 | consumerd32_bin = bin; | |
7753dea8 | 355 | } |
fc7a59ce AM |
356 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
357 | if (bin) { | |
358 | consumerd64_bin = bin; | |
ebaeda94 | 359 | } |
72f579ee | 360 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
361 | if (libdir) { |
362 | consumerd32_libdir = libdir; | |
363 | } | |
72f579ee | 364 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
365 | if (libdir) { |
366 | consumerd64_libdir = libdir; | |
fb09408a MD |
367 | } |
368 | } | |
369 | ||
5eb91c98 DG |
370 | /* |
371 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
372 | */ | |
d0b96690 | 373 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
374 | { |
375 | int ret; | |
376 | ||
d0b96690 | 377 | assert(events); |
5eb91c98 DG |
378 | |
379 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
380 | if (ret < 0) { | |
381 | goto error; | |
382 | } | |
383 | ||
384 | /* Add quit pipe */ | |
d0b96690 | 385 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
386 | if (ret < 0) { |
387 | goto error; | |
388 | } | |
389 | ||
390 | return 0; | |
391 | ||
392 | error: | |
393 | return ret; | |
394 | } | |
395 | ||
396 | /* | |
397 | * Check if the thread quit pipe was triggered. | |
398 | * | |
399 | * Return 1 if it was triggered else 0; | |
400 | */ | |
d0b96690 | 401 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
402 | { |
403 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
404 | return 1; | |
405 | } | |
406 | ||
407 | return 0; | |
408 | } | |
409 | ||
273ea72c | 410 | /* |
5eb91c98 | 411 | * Init thread quit pipe. |
273ea72c DG |
412 | * |
413 | * Return -1 on error or 0 if all pipes are created. | |
414 | */ | |
415 | static int init_thread_quit_pipe(void) | |
416 | { | |
730389d9 | 417 | int ret, i; |
273ea72c | 418 | |
730389d9 | 419 | ret = pipe(thread_quit_pipe); |
273ea72c | 420 | if (ret < 0) { |
730389d9 | 421 | PERROR("thread quit pipe"); |
273ea72c DG |
422 | goto error; |
423 | } | |
424 | ||
730389d9 DG |
425 | for (i = 0; i < 2; i++) { |
426 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
427 | if (ret < 0) { | |
428 | PERROR("fcntl"); | |
429 | goto error; | |
430 | } | |
431 | } | |
432 | ||
273ea72c DG |
433 | error: |
434 | return ret; | |
435 | } | |
436 | ||
099e26bd DG |
437 | /* |
438 | * Stop all threads by closing the thread quit pipe. | |
439 | */ | |
cf3af59e MD |
440 | static void stop_threads(void) |
441 | { | |
5eb91c98 DG |
442 | int ret; |
443 | ||
cf3af59e MD |
444 | /* Stopping all threads */ |
445 | DBG("Terminating all threads"); | |
54d01ffb | 446 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
447 | if (ret < 0) { |
448 | ERR("write error on thread quit pipe"); | |
449 | } | |
450 | ||
099e26bd | 451 | /* Dispatch thread */ |
26c9d55e | 452 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 453 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
454 | } |
455 | ||
e975f9f8 DG |
456 | /* |
457 | * Close every consumer sockets. | |
458 | */ | |
459 | static void close_consumer_sockets(void) | |
460 | { | |
461 | int ret; | |
462 | ||
463 | if (kconsumer_data.err_sock >= 0) { | |
464 | ret = close(kconsumer_data.err_sock); | |
465 | if (ret < 0) { | |
466 | PERROR("kernel consumer err_sock close"); | |
467 | } | |
468 | } | |
469 | if (ustconsumer32_data.err_sock >= 0) { | |
470 | ret = close(ustconsumer32_data.err_sock); | |
471 | if (ret < 0) { | |
a76cbd9f | 472 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
473 | } |
474 | } | |
475 | if (ustconsumer64_data.err_sock >= 0) { | |
476 | ret = close(ustconsumer64_data.err_sock); | |
477 | if (ret < 0) { | |
a76cbd9f | 478 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
479 | } |
480 | } | |
481 | if (kconsumer_data.cmd_sock >= 0) { | |
482 | ret = close(kconsumer_data.cmd_sock); | |
483 | if (ret < 0) { | |
484 | PERROR("kernel consumer cmd_sock close"); | |
485 | } | |
486 | } | |
487 | if (ustconsumer32_data.cmd_sock >= 0) { | |
488 | ret = close(ustconsumer32_data.cmd_sock); | |
489 | if (ret < 0) { | |
a76cbd9f | 490 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
491 | } |
492 | } | |
493 | if (ustconsumer64_data.cmd_sock >= 0) { | |
494 | ret = close(ustconsumer64_data.cmd_sock); | |
495 | if (ret < 0) { | |
a76cbd9f | 496 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
497 | } |
498 | } | |
499 | } | |
500 | ||
fac6795d | 501 | /* |
d063d709 | 502 | * Cleanup the daemon |
fac6795d | 503 | */ |
cf3af59e | 504 | static void cleanup(void) |
fac6795d | 505 | { |
ef599319 | 506 | int ret; |
af9737e9 | 507 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 508 | char path[PATH_MAX]; |
fac6795d | 509 | |
1d4b027a | 510 | DBG("Cleaning up"); |
e07ae692 | 511 | |
4e449f3f MD |
512 | /* |
513 | * Close the thread quit pipe. It has already done its job, | |
514 | * since we are now called. | |
515 | */ | |
2f77fc4b DG |
516 | utils_close_pipe(thread_quit_pipe); |
517 | ||
35f90c40 DG |
518 | /* |
519 | * If opt_pidfile is undefined, the default file will be wiped when | |
520 | * removing the rundir. | |
521 | */ | |
522 | if (opt_pidfile) { | |
523 | ret = remove(opt_pidfile); | |
524 | if (ret < 0) { | |
525 | PERROR("remove pidfile %s", opt_pidfile); | |
526 | } | |
527 | } | |
528 | ||
8c6c56c2 MD |
529 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
530 | ||
531 | /* sessiond */ | |
532 | snprintf(path, PATH_MAX, | |
533 | "%s/%s", | |
534 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
535 | DBG("Removing %s", path); | |
536 | (void) unlink(path); | |
537 | ||
cd9290dd DG |
538 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
539 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE); | |
540 | DBG("Removing %s", path); | |
541 | (void) unlink(path); | |
542 | ||
8c6c56c2 MD |
543 | /* kconsumerd */ |
544 | snprintf(path, PATH_MAX, | |
545 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
546 | rundir); | |
547 | DBG("Removing %s", path); | |
548 | (void) unlink(path); | |
549 | ||
550 | snprintf(path, PATH_MAX, | |
551 | DEFAULT_KCONSUMERD_PATH, | |
552 | rundir); | |
553 | DBG("Removing directory %s", path); | |
554 | (void) rmdir(path); | |
555 | ||
556 | /* ust consumerd 32 */ | |
557 | snprintf(path, PATH_MAX, | |
558 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
559 | rundir); | |
560 | DBG("Removing %s", path); | |
561 | (void) unlink(path); | |
562 | ||
563 | snprintf(path, PATH_MAX, | |
564 | DEFAULT_USTCONSUMERD32_PATH, | |
565 | rundir); | |
566 | DBG("Removing directory %s", path); | |
567 | (void) rmdir(path); | |
568 | ||
569 | /* ust consumerd 64 */ | |
570 | snprintf(path, PATH_MAX, | |
571 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
572 | rundir); | |
573 | DBG("Removing %s", path); | |
574 | (void) unlink(path); | |
575 | ||
576 | snprintf(path, PATH_MAX, | |
577 | DEFAULT_USTCONSUMERD64_PATH, | |
578 | rundir); | |
579 | DBG("Removing directory %s", path); | |
580 | (void) rmdir(path); | |
5461b305 | 581 | |
dcbcae3e MD |
582 | /* |
583 | * We do NOT rmdir rundir because there are other processes | |
584 | * using it, for instance lttng-relayd, which can start in | |
585 | * parallel with this teardown. | |
586 | */ | |
587 | ||
bd69add2 | 588 | free(rundir); |
5461b305 | 589 | |
99bab54f | 590 | DBG("Cleaning up all sessions"); |
fac6795d | 591 | |
b5541356 | 592 | /* Destroy session list mutex */ |
273ea72c DG |
593 | if (session_list_ptr != NULL) { |
594 | pthread_mutex_destroy(&session_list_ptr->lock); | |
595 | ||
596 | /* Cleanup ALL session */ | |
54d01ffb DG |
597 | cds_list_for_each_entry_safe(sess, stmp, |
598 | &session_list_ptr->head, list) { | |
2f77fc4b | 599 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
600 | } |
601 | } | |
602 | ||
099e26bd | 603 | DBG("Closing all UST sockets"); |
56fff090 | 604 | ust_app_clean_list(); |
7972aab2 | 605 | buffer_reg_destroy_registries(); |
099e26bd | 606 | |
4fba7219 DG |
607 | if (is_root && !opt_no_kernel) { |
608 | DBG2("Closing kernel fd"); | |
a4b35e07 | 609 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
610 | ret = close(kernel_tracer_fd); |
611 | if (ret) { | |
612 | PERROR("close"); | |
613 | } | |
a4b35e07 | 614 | } |
2f50c8a3 | 615 | DBG("Unloading kernel modules"); |
096102bd | 616 | modprobe_remove_lttng_all(); |
2f50c8a3 | 617 | } |
2f77fc4b | 618 | |
e975f9f8 DG |
619 | close_consumer_sockets(); |
620 | ||
26296c48 JG |
621 | /* |
622 | * If the override option is set, the pointer points to a *non* const thus | |
623 | * freeing it even though the variable type is set to const. | |
624 | */ | |
625 | if (tracing_group_name_override) { | |
626 | free((void *) tracing_group_name); | |
627 | } | |
628 | if (consumerd32_bin_override) { | |
629 | free((void *) consumerd32_bin); | |
630 | } | |
631 | if (consumerd64_bin_override) { | |
632 | free((void *) consumerd64_bin); | |
633 | } | |
634 | if (consumerd32_libdir_override) { | |
635 | free((void *) consumerd32_libdir); | |
636 | } | |
637 | if (consumerd64_libdir_override) { | |
638 | free((void *) consumerd64_libdir); | |
639 | } | |
640 | ||
641 | if (opt_pidfile) { | |
642 | free(opt_pidfile); | |
643 | } | |
644 | ||
421cb601 | 645 | /* <fun> */ |
f56a39af | 646 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
647 | "Matthew, BEET driven development works!%c[%dm", |
648 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
649 | /* </fun> */ | |
fac6795d DG |
650 | } |
651 | ||
e065084a | 652 | /* |
d063d709 | 653 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 654 | * |
d063d709 | 655 | * Return lttcomm error code. |
e065084a DG |
656 | */ |
657 | static int send_unix_sock(int sock, void *buf, size_t len) | |
658 | { | |
659 | /* Check valid length */ | |
c617c0c6 | 660 | if (len == 0) { |
e065084a DG |
661 | return -1; |
662 | } | |
663 | ||
664 | return lttcomm_send_unix_sock(sock, buf, len); | |
665 | } | |
666 | ||
5461b305 | 667 | /* |
d063d709 | 668 | * Free memory of a command context structure. |
5461b305 | 669 | */ |
a2fb29a5 | 670 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 671 | { |
a2fb29a5 DG |
672 | DBG("Clean command context structure"); |
673 | if (*cmd_ctx) { | |
674 | if ((*cmd_ctx)->llm) { | |
675 | free((*cmd_ctx)->llm); | |
5461b305 | 676 | } |
a2fb29a5 DG |
677 | if ((*cmd_ctx)->lsm) { |
678 | free((*cmd_ctx)->lsm); | |
5461b305 | 679 | } |
a2fb29a5 DG |
680 | free(*cmd_ctx); |
681 | *cmd_ctx = NULL; | |
5461b305 DG |
682 | } |
683 | } | |
684 | ||
fac6795d | 685 | /* |
0fdd1e2c | 686 | * Notify UST applications using the shm mmap futex. |
fac6795d | 687 | */ |
0fdd1e2c | 688 | static int notify_ust_apps(int active) |
fac6795d | 689 | { |
0fdd1e2c | 690 | char *wait_shm_mmap; |
fac6795d | 691 | |
0fdd1e2c | 692 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 693 | |
0fdd1e2c DG |
694 | /* See shm.c for this call implying mmap, shm and futex calls */ |
695 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
696 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
697 | goto error; |
698 | } | |
699 | ||
0fdd1e2c DG |
700 | /* Wake waiting process */ |
701 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
702 | ||
703 | /* Apps notified successfully */ | |
704 | return 0; | |
fac6795d DG |
705 | |
706 | error: | |
0fdd1e2c | 707 | return -1; |
fac6795d DG |
708 | } |
709 | ||
e065084a | 710 | /* |
d063d709 DG |
711 | * Setup the outgoing data buffer for the response (llm) by allocating the |
712 | * right amount of memory and copying the original information from the lsm | |
713 | * structure. | |
ca95a216 | 714 | * |
d063d709 | 715 | * Return total size of the buffer pointed by buf. |
ca95a216 | 716 | */ |
5461b305 | 717 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 718 | { |
f3ed775e | 719 | int ret, buf_size; |
ca95a216 | 720 | |
f3ed775e | 721 | buf_size = size; |
5461b305 | 722 | |
ba7f0ae5 | 723 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 724 | if (cmd_ctx->llm == NULL) { |
76d7553f | 725 | PERROR("zmalloc"); |
5461b305 | 726 | ret = -ENOMEM; |
ca95a216 DG |
727 | goto error; |
728 | } | |
729 | ||
5461b305 DG |
730 | /* Copy common data */ |
731 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 732 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 733 | |
5461b305 DG |
734 | cmd_ctx->llm->data_size = size; |
735 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
736 | ||
ca95a216 DG |
737 | return buf_size; |
738 | ||
739 | error: | |
740 | return ret; | |
741 | } | |
742 | ||
7a485870 | 743 | /* |
5eb91c98 | 744 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 745 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 746 | */ |
5eb91c98 | 747 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 748 | { |
5eb91c98 | 749 | int ret; |
7a485870 DG |
750 | struct ltt_session *session; |
751 | struct ltt_kernel_channel *channel; | |
752 | ||
5eb91c98 | 753 | DBG("Updating kernel poll set"); |
7a485870 | 754 | |
54d01ffb | 755 | session_lock_list(); |
b5541356 | 756 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 757 | session_lock(session); |
7a485870 | 758 | if (session->kernel_session == NULL) { |
54d01ffb | 759 | session_unlock(session); |
7a485870 DG |
760 | continue; |
761 | } | |
7a485870 | 762 | |
54d01ffb DG |
763 | cds_list_for_each_entry(channel, |
764 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
765 | /* Add channel fd to the kernel poll set */ |
766 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
767 | if (ret < 0) { | |
54d01ffb | 768 | session_unlock(session); |
5eb91c98 DG |
769 | goto error; |
770 | } | |
771 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 772 | } |
54d01ffb | 773 | session_unlock(session); |
7a485870 | 774 | } |
54d01ffb | 775 | session_unlock_list(); |
7a485870 | 776 | |
5eb91c98 | 777 | return 0; |
7a485870 DG |
778 | |
779 | error: | |
54d01ffb | 780 | session_unlock_list(); |
7a485870 DG |
781 | return -1; |
782 | } | |
783 | ||
784 | /* | |
54d01ffb | 785 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 786 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 787 | * |
d063d709 | 788 | * Useful for CPU hotplug feature. |
7a485870 | 789 | */ |
2bdd86d4 | 790 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
791 | { |
792 | int ret = 0; | |
793 | struct ltt_session *session; | |
173af62f | 794 | struct ltt_kernel_session *ksess; |
7a485870 DG |
795 | struct ltt_kernel_channel *channel; |
796 | ||
797 | DBG("Updating kernel streams for channel fd %d", fd); | |
798 | ||
54d01ffb | 799 | session_lock_list(); |
b5541356 | 800 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 801 | session_lock(session); |
7a485870 | 802 | if (session->kernel_session == NULL) { |
54d01ffb | 803 | session_unlock(session); |
7a485870 DG |
804 | continue; |
805 | } | |
173af62f | 806 | ksess = session->kernel_session; |
d9800920 | 807 | |
173af62f | 808 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
809 | if (channel->fd == fd) { |
810 | DBG("Channel found, updating kernel streams"); | |
811 | ret = kernel_open_channel_stream(channel); | |
812 | if (ret < 0) { | |
b3c750d2 | 813 | goto error; |
7a485870 | 814 | } |
5c786ded JD |
815 | /* Update the stream global counter */ |
816 | ksess->stream_count_global += ret; | |
d9800920 | 817 | |
7a485870 | 818 | /* |
5eb91c98 DG |
819 | * Have we already sent fds to the consumer? If yes, it means |
820 | * that tracing is started so it is safe to send our updated | |
821 | * stream fds. | |
7a485870 | 822 | */ |
173af62f DG |
823 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
824 | struct lttng_ht_iter iter; | |
825 | struct consumer_socket *socket; | |
826 | ||
e7fe706f | 827 | rcu_read_lock(); |
173af62f DG |
828 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
829 | &iter.iter, socket, node.node) { | |
173af62f | 830 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 831 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
832 | channel, ksess, |
833 | session->output_traces ? 1 : 0); | |
173af62f DG |
834 | pthread_mutex_unlock(socket->lock); |
835 | if (ret < 0) { | |
e7fe706f | 836 | rcu_read_unlock(); |
173af62f DG |
837 | goto error; |
838 | } | |
7a485870 | 839 | } |
e7fe706f | 840 | rcu_read_unlock(); |
7a485870 | 841 | } |
b3c750d2 | 842 | goto error; |
7a485870 DG |
843 | } |
844 | } | |
54d01ffb | 845 | session_unlock(session); |
7a485870 | 846 | } |
54d01ffb | 847 | session_unlock_list(); |
b3c750d2 | 848 | return ret; |
7a485870 | 849 | |
b3c750d2 | 850 | error: |
54d01ffb DG |
851 | session_unlock(session); |
852 | session_unlock_list(); | |
7a485870 DG |
853 | return ret; |
854 | } | |
855 | ||
487cf67c | 856 | /* |
ffe60014 DG |
857 | * For each tracing session, update newly registered apps. The session list |
858 | * lock MUST be acquired before calling this. | |
487cf67c DG |
859 | */ |
860 | static void update_ust_app(int app_sock) | |
861 | { | |
862 | struct ltt_session *sess, *stmp; | |
863 | ||
fdadac08 DG |
864 | /* Consumer is in an ERROR state. Stop any application update. */ |
865 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
866 | /* Stop the update process since the consumer is dead. */ | |
867 | return; | |
868 | } | |
869 | ||
487cf67c DG |
870 | /* For all tracing session(s) */ |
871 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 872 | session_lock(sess); |
421cb601 DG |
873 | if (sess->ust_session) { |
874 | ust_app_global_update(sess->ust_session, app_sock); | |
875 | } | |
4ee14516 | 876 | session_unlock(sess); |
487cf67c DG |
877 | } |
878 | } | |
879 | ||
7a485870 | 880 | /* |
d063d709 | 881 | * This thread manage event coming from the kernel. |
7a485870 | 882 | * |
d063d709 DG |
883 | * Features supported in this thread: |
884 | * -) CPU Hotplug | |
7a485870 DG |
885 | */ |
886 | static void *thread_manage_kernel(void *data) | |
887 | { | |
139ac872 | 888 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 889 | uint32_t revents, nb_fd; |
7a485870 | 890 | char tmp; |
5eb91c98 | 891 | struct lttng_poll_event events; |
7a485870 | 892 | |
6993eeb3 | 893 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 894 | |
6c71277b | 895 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 896 | |
d5d63bf1 DG |
897 | /* |
898 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 899 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 900 | */ |
6d737ce4 | 901 | lttng_poll_init(&events); |
d5d63bf1 | 902 | |
e547b070 | 903 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
904 | goto error_testpoint; |
905 | } | |
8ac94142 | 906 | |
840cb59c | 907 | health_code_update(); |
44a5e5eb | 908 | |
e547b070 | 909 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 910 | goto error_testpoint; |
6993eeb3 CB |
911 | } |
912 | ||
7a485870 | 913 | while (1) { |
840cb59c | 914 | health_code_update(); |
44a5e5eb | 915 | |
7a485870 | 916 | if (update_poll_flag == 1) { |
d21b0d71 DG |
917 | /* Clean events object. We are about to populate it again. */ |
918 | lttng_poll_clean(&events); | |
919 | ||
d0b96690 | 920 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
921 | if (ret < 0) { |
922 | goto error_poll_create; | |
923 | } | |
924 | ||
925 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
926 | if (ret < 0) { | |
927 | goto error; | |
928 | } | |
5f822d0a | 929 | |
d21b0d71 | 930 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
931 | ret = update_kernel_poll(&events); |
932 | if (ret < 0) { | |
7a485870 DG |
933 | goto error; |
934 | } | |
935 | update_poll_flag = 0; | |
936 | } | |
937 | ||
d21b0d71 | 938 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
939 | |
940 | /* Poll infinite value of time */ | |
88f2b785 | 941 | restart: |
a78af745 | 942 | health_poll_entry(); |
5eb91c98 | 943 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 944 | health_poll_exit(); |
7a485870 | 945 | if (ret < 0) { |
88f2b785 MD |
946 | /* |
947 | * Restart interrupted system call. | |
948 | */ | |
949 | if (errno == EINTR) { | |
950 | goto restart; | |
951 | } | |
7a485870 DG |
952 | goto error; |
953 | } else if (ret == 0) { | |
954 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
955 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
956 | "This should not have happened! Continuing..."); | |
7a485870 DG |
957 | continue; |
958 | } | |
959 | ||
0d9c5d77 DG |
960 | nb_fd = ret; |
961 | ||
5eb91c98 DG |
962 | for (i = 0; i < nb_fd; i++) { |
963 | /* Fetch once the poll data */ | |
964 | revents = LTTNG_POLL_GETEV(&events, i); | |
965 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 966 | |
840cb59c | 967 | health_code_update(); |
44a5e5eb | 968 | |
5eb91c98 | 969 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 970 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 971 | if (ret) { |
139ac872 MD |
972 | err = 0; |
973 | goto exit; | |
5eb91c98 | 974 | } |
7a485870 | 975 | |
5eb91c98 DG |
976 | /* Check for data on kernel pipe */ |
977 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
978 | (void) lttng_read(kernel_poll_pipe[0], |
979 | &tmp, 1); | |
f921c78f DG |
980 | /* |
981 | * Ret value is useless here, if this pipe gets any actions an | |
982 | * update is required anyway. | |
983 | */ | |
5eb91c98 DG |
984 | update_poll_flag = 1; |
985 | continue; | |
986 | } else { | |
987 | /* | |
988 | * New CPU detected by the kernel. Adding kernel stream to | |
989 | * kernel session and updating the kernel consumer | |
990 | */ | |
991 | if (revents & LPOLLIN) { | |
2bdd86d4 | 992 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
993 | if (ret < 0) { |
994 | continue; | |
995 | } | |
996 | break; | |
997 | /* | |
998 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
999 | * and unregister kernel stream at this point. | |
1000 | */ | |
7a485870 | 1001 | } |
7a485870 DG |
1002 | } |
1003 | } | |
1004 | } | |
1005 | ||
139ac872 | 1006 | exit: |
7a485870 | 1007 | error: |
5eb91c98 | 1008 | lttng_poll_clean(&events); |
76d7553f | 1009 | error_poll_create: |
6993eeb3 | 1010 | error_testpoint: |
6620da75 DG |
1011 | utils_close_pipe(kernel_poll_pipe); |
1012 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1013 | if (err) { |
840cb59c | 1014 | health_error(); |
139ac872 | 1015 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1016 | WARN("Kernel thread died unexpectedly. " |
1017 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1018 | } |
8782cc74 | 1019 | health_unregister(health_sessiond); |
76d7553f | 1020 | DBG("Kernel thread dying"); |
7a485870 DG |
1021 | return NULL; |
1022 | } | |
1023 | ||
a23ec3a7 DG |
1024 | /* |
1025 | * Signal pthread condition of the consumer data that the thread. | |
1026 | */ | |
1027 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1028 | { | |
1029 | pthread_mutex_lock(&data->cond_mutex); | |
1030 | ||
1031 | /* | |
1032 | * The state is set before signaling. It can be any value, it's the waiter | |
1033 | * job to correctly interpret this condition variable associated to the | |
1034 | * consumer pthread_cond. | |
1035 | * | |
1036 | * A value of 0 means that the corresponding thread of the consumer data | |
1037 | * was not started. 1 indicates that the thread has started and is ready | |
1038 | * for action. A negative value means that there was an error during the | |
1039 | * thread bootstrap. | |
1040 | */ | |
1041 | data->consumer_thread_is_ready = state; | |
1042 | (void) pthread_cond_signal(&data->cond); | |
1043 | ||
1044 | pthread_mutex_unlock(&data->cond_mutex); | |
1045 | } | |
1046 | ||
1d4b027a | 1047 | /* |
3bd1e081 | 1048 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1049 | */ |
3bd1e081 | 1050 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1051 | { |
139ac872 | 1052 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 1053 | uint32_t revents, nb_fd; |
1d4b027a | 1054 | enum lttcomm_return_code code; |
5eb91c98 | 1055 | struct lttng_poll_event events; |
3bd1e081 | 1056 | struct consumer_data *consumer_data = data; |
1d4b027a | 1057 | |
3bd1e081 | 1058 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1059 | |
6c71277b | 1060 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1061 | |
855060f8 | 1062 | health_code_update(); |
9449cc75 | 1063 | |
5eb91c98 | 1064 | /* |
331744e3 JD |
1065 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1066 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1067 | */ |
331744e3 | 1068 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1069 | if (ret < 0) { |
76d7553f | 1070 | goto error_poll; |
5eb91c98 | 1071 | } |
273ea72c | 1072 | |
edb8b045 DG |
1073 | /* |
1074 | * The error socket here is already in a listening state which was done | |
1075 | * just before spawning this thread to avoid a race between the consumer | |
1076 | * daemon exec trying to connect and the listen() call. | |
1077 | */ | |
3bd1e081 | 1078 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1079 | if (ret < 0) { |
1080 | goto error; | |
1081 | } | |
1082 | ||
840cb59c | 1083 | health_code_update(); |
44a5e5eb | 1084 | |
331744e3 | 1085 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1086 | restart: |
a78af745 | 1087 | health_poll_entry(); |
8ac94142 | 1088 | |
e547b070 | 1089 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1090 | goto error; |
1091 | } | |
8ac94142 | 1092 | |
5eb91c98 | 1093 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1094 | health_poll_exit(); |
273ea72c | 1095 | if (ret < 0) { |
88f2b785 MD |
1096 | /* |
1097 | * Restart interrupted system call. | |
1098 | */ | |
1099 | if (errno == EINTR) { | |
1100 | goto restart; | |
1101 | } | |
273ea72c DG |
1102 | goto error; |
1103 | } | |
1104 | ||
0d9c5d77 DG |
1105 | nb_fd = ret; |
1106 | ||
5eb91c98 DG |
1107 | for (i = 0; i < nb_fd; i++) { |
1108 | /* Fetch once the poll data */ | |
1109 | revents = LTTNG_POLL_GETEV(&events, i); | |
1110 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1111 | ||
840cb59c | 1112 | health_code_update(); |
44a5e5eb | 1113 | |
5eb91c98 | 1114 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1115 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1116 | if (ret) { |
139ac872 MD |
1117 | err = 0; |
1118 | goto exit; | |
5eb91c98 DG |
1119 | } |
1120 | ||
1121 | /* Event on the registration socket */ | |
3bd1e081 | 1122 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1123 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1124 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1125 | goto error; |
1126 | } | |
1127 | } | |
273ea72c DG |
1128 | } |
1129 | ||
3bd1e081 | 1130 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1131 | if (sock < 0) { |
1132 | goto error; | |
1133 | } | |
1134 | ||
b662582b DG |
1135 | /* |
1136 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1137 | * show must go on. | |
1138 | */ | |
1139 | (void) utils_set_fd_cloexec(sock); | |
1140 | ||
840cb59c | 1141 | health_code_update(); |
44a5e5eb | 1142 | |
3bd1e081 | 1143 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1144 | |
712ea556 | 1145 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1146 | ret = lttcomm_recv_unix_sock(sock, &code, |
1147 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1148 | if (ret <= 0) { |
1149 | goto error; | |
1150 | } | |
1151 | ||
840cb59c | 1152 | health_code_update(); |
44a5e5eb | 1153 | |
f73fabfd | 1154 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1155 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1156 | consumer_data->cmd_sock = |
1157 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1158 | consumer_data->metadata_fd = |
331744e3 | 1159 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1160 | if (consumer_data->cmd_sock < 0 |
1161 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1162 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1163 | /* On error, signal condition and quit. */ |
1164 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1165 | goto error; |
1166 | } | |
9363801e | 1167 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1168 | /* Create metadata socket lock. */ |
1169 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1170 | if (consumer_data->metadata_sock.lock == NULL) { | |
1171 | PERROR("zmalloc pthread mutex"); | |
1172 | ret = -1; | |
1173 | goto error; | |
1174 | } | |
1175 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1176 | ||
a23ec3a7 | 1177 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1178 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1179 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1180 | consumer_data->metadata_fd); |
1d4b027a | 1181 | } else { |
3bd1e081 | 1182 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1183 | lttcomm_get_readable_code(-code)); |
1184 | goto error; | |
1185 | } | |
1186 | ||
331744e3 | 1187 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1188 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1189 | if (ret < 0) { |
72079cae DG |
1190 | goto error; |
1191 | } | |
1192 | ||
331744e3 | 1193 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1194 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1195 | if (ret < 0) { | |
72079cae | 1196 | goto error; |
5eb91c98 DG |
1197 | } |
1198 | ||
331744e3 | 1199 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1200 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1201 | LPOLLIN | LPOLLRDHUP); |
1202 | if (ret < 0) { | |
1203 | goto error; | |
1204 | } | |
1205 | ||
840cb59c | 1206 | health_code_update(); |
44a5e5eb | 1207 | |
331744e3 | 1208 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1209 | restart_poll: |
331744e3 JD |
1210 | while (1) { |
1211 | health_poll_entry(); | |
1212 | ret = lttng_poll_wait(&events, -1); | |
1213 | health_poll_exit(); | |
1214 | if (ret < 0) { | |
1215 | /* | |
1216 | * Restart interrupted system call. | |
1217 | */ | |
1218 | if (errno == EINTR) { | |
1219 | goto restart_poll; | |
1220 | } | |
1221 | goto error; | |
88f2b785 | 1222 | } |
72079cae | 1223 | |
331744e3 | 1224 | nb_fd = ret; |
0d9c5d77 | 1225 | |
331744e3 JD |
1226 | for (i = 0; i < nb_fd; i++) { |
1227 | /* Fetch once the poll data */ | |
1228 | revents = LTTNG_POLL_GETEV(&events, i); | |
1229 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1230 | |
331744e3 | 1231 | health_code_update(); |
44a5e5eb | 1232 | |
331744e3 JD |
1233 | /* Thread quit pipe has been closed. Killing thread. */ |
1234 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1235 | if (ret) { | |
1236 | err = 0; | |
1237 | goto exit; | |
1238 | } | |
5eb91c98 | 1239 | |
331744e3 JD |
1240 | if (pollfd == sock) { |
1241 | /* Event on the consumerd socket */ | |
1242 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1243 | ERR("consumer err socket second poll error"); | |
1244 | goto error; | |
1245 | } | |
1246 | health_code_update(); | |
1247 | /* Wait for any kconsumerd error */ | |
1248 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1249 | sizeof(enum lttcomm_return_code)); | |
1250 | if (ret <= 0) { | |
1251 | ERR("consumer closed the command socket"); | |
1252 | goto error; | |
1253 | } | |
1254 | ||
1255 | ERR("consumer return code : %s", | |
1256 | lttcomm_get_readable_code(-code)); | |
1257 | ||
1258 | goto exit; | |
4ce514c4 | 1259 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1260 | /* UST metadata requests */ |
1261 | ret = ust_consumer_metadata_request( | |
1262 | &consumer_data->metadata_sock); | |
1263 | if (ret < 0) { | |
1264 | ERR("Handling metadata request"); | |
1265 | goto error; | |
1266 | } | |
1267 | break; | |
1268 | } else { | |
1269 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1270 | goto error; |
1271 | } | |
1272 | } | |
331744e3 | 1273 | health_code_update(); |
5eb91c98 DG |
1274 | } |
1275 | ||
139ac872 | 1276 | exit: |
1d4b027a | 1277 | error: |
fdadac08 DG |
1278 | /* |
1279 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1280 | * thread might be using them so get exclusive access which will abort all |
1281 | * other consumer command by other threads. | |
fdadac08 DG |
1282 | */ |
1283 | pthread_mutex_lock(&consumer_data->lock); | |
1284 | ||
5c827ce0 DG |
1285 | /* Immediately set the consumerd state to stopped */ |
1286 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1287 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1288 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1289 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1290 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1291 | } else { | |
1292 | /* Code flow error... */ | |
1293 | assert(0); | |
1294 | } | |
1295 | ||
76d7553f MD |
1296 | if (consumer_data->err_sock >= 0) { |
1297 | ret = close(consumer_data->err_sock); | |
1298 | if (ret) { | |
1299 | PERROR("close"); | |
1300 | } | |
a76cbd9f | 1301 | consumer_data->err_sock = -1; |
76d7553f MD |
1302 | } |
1303 | if (consumer_data->cmd_sock >= 0) { | |
1304 | ret = close(consumer_data->cmd_sock); | |
1305 | if (ret) { | |
1306 | PERROR("close"); | |
1307 | } | |
a76cbd9f | 1308 | consumer_data->cmd_sock = -1; |
76d7553f | 1309 | } |
9363801e DG |
1310 | if (*consumer_data->metadata_sock.fd_ptr >= 0) { |
1311 | ret = close(*consumer_data->metadata_sock.fd_ptr); | |
331744e3 JD |
1312 | if (ret) { |
1313 | PERROR("close"); | |
1314 | } | |
1315 | } | |
331744e3 | 1316 | |
76d7553f MD |
1317 | if (sock >= 0) { |
1318 | ret = close(sock); | |
1319 | if (ret) { | |
1320 | PERROR("close"); | |
1321 | } | |
1322 | } | |
273ea72c | 1323 | |
3bd1e081 MD |
1324 | unlink(consumer_data->err_unix_sock_path); |
1325 | unlink(consumer_data->cmd_unix_sock_path); | |
1326 | consumer_data->pid = 0; | |
fdadac08 | 1327 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1328 | |
fdadac08 DG |
1329 | /* Cleanup metadata socket mutex. */ |
1330 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1331 | free(consumer_data->metadata_sock.lock); | |
1d4b027a | 1332 | |
5eb91c98 | 1333 | lttng_poll_clean(&events); |
76d7553f | 1334 | error_poll: |
139ac872 | 1335 | if (err) { |
840cb59c | 1336 | health_error(); |
139ac872 MD |
1337 | ERR("Health error occurred in %s", __func__); |
1338 | } | |
8782cc74 | 1339 | health_unregister(health_sessiond); |
76d7553f | 1340 | DBG("consumer thread cleanup completed"); |
0177d773 | 1341 | |
5eb91c98 | 1342 | return NULL; |
099e26bd DG |
1343 | } |
1344 | ||
099e26bd DG |
1345 | /* |
1346 | * This thread manage application communication. | |
1d4b027a DG |
1347 | */ |
1348 | static void *thread_manage_apps(void *data) | |
099e26bd | 1349 | { |
139ac872 | 1350 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1351 | ssize_t size_ret; |
5eb91c98 | 1352 | uint32_t revents, nb_fd; |
5eb91c98 | 1353 | struct lttng_poll_event events; |
099e26bd DG |
1354 | |
1355 | DBG("[thread] Manage application started"); | |
1356 | ||
f6a9efaa DG |
1357 | rcu_register_thread(); |
1358 | rcu_thread_online(); | |
1359 | ||
6c71277b | 1360 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1361 | |
e547b070 | 1362 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1363 | goto error_testpoint; |
1364 | } | |
1365 | ||
840cb59c | 1366 | health_code_update(); |
44a5e5eb | 1367 | |
d0b96690 | 1368 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1369 | if (ret < 0) { |
76d7553f | 1370 | goto error_poll_create; |
5eb91c98 | 1371 | } |
099e26bd | 1372 | |
5eb91c98 DG |
1373 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1374 | if (ret < 0) { | |
1375 | goto error; | |
1376 | } | |
099e26bd | 1377 | |
e547b070 | 1378 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1379 | goto error; |
1380 | } | |
8ac94142 | 1381 | |
840cb59c | 1382 | health_code_update(); |
44a5e5eb | 1383 | |
5eb91c98 | 1384 | while (1) { |
d21b0d71 | 1385 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1386 | |
1387 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1388 | restart: |
a78af745 | 1389 | health_poll_entry(); |
5eb91c98 | 1390 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1391 | health_poll_exit(); |
099e26bd | 1392 | if (ret < 0) { |
88f2b785 MD |
1393 | /* |
1394 | * Restart interrupted system call. | |
1395 | */ | |
1396 | if (errno == EINTR) { | |
1397 | goto restart; | |
1398 | } | |
099e26bd DG |
1399 | goto error; |
1400 | } | |
1401 | ||
0d9c5d77 DG |
1402 | nb_fd = ret; |
1403 | ||
5eb91c98 DG |
1404 | for (i = 0; i < nb_fd; i++) { |
1405 | /* Fetch once the poll data */ | |
1406 | revents = LTTNG_POLL_GETEV(&events, i); | |
1407 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1408 | ||
840cb59c | 1409 | health_code_update(); |
44a5e5eb | 1410 | |
5eb91c98 | 1411 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1412 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1413 | if (ret) { |
139ac872 MD |
1414 | err = 0; |
1415 | goto exit; | |
5eb91c98 | 1416 | } |
099e26bd | 1417 | |
5eb91c98 DG |
1418 | /* Inspect the apps cmd pipe */ |
1419 | if (pollfd == apps_cmd_pipe[0]) { | |
1420 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1421 | ERR("Apps command pipe error"); | |
0177d773 | 1422 | goto error; |
5eb91c98 | 1423 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1424 | int sock; |
1425 | ||
5eb91c98 | 1426 | /* Empty pipe */ |
6cd525e8 MD |
1427 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1428 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1429 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1430 | goto error; |
1431 | } | |
099e26bd | 1432 | |
840cb59c | 1433 | health_code_update(); |
44a5e5eb | 1434 | |
ffe60014 | 1435 | /* |
d0b96690 DG |
1436 | * We only monitor the error events of the socket. This |
1437 | * thread does not handle any incoming data from UST | |
1438 | * (POLLIN). | |
ffe60014 | 1439 | */ |
d0b96690 DG |
1440 | ret = lttng_poll_add(&events, sock, |
1441 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1442 | if (ret < 0) { | |
5eb91c98 | 1443 | goto error; |
e0c7ec2b | 1444 | } |
acc7b41b | 1445 | |
d0b96690 | 1446 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1447 | } |
5eb91c98 DG |
1448 | } else { |
1449 | /* | |
54d01ffb DG |
1450 | * At this point, we know that a registered application made |
1451 | * the event at poll_wait. | |
5eb91c98 DG |
1452 | */ |
1453 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1454 | /* Removing from the poll set */ | |
1455 | ret = lttng_poll_del(&events, pollfd); | |
1456 | if (ret < 0) { | |
1457 | goto error; | |
1458 | } | |
099e26bd | 1459 | |
b9d9b220 | 1460 | /* Socket closed on remote end. */ |
56fff090 | 1461 | ust_app_unregister(pollfd); |
5eb91c98 | 1462 | } |
099e26bd | 1463 | } |
44a5e5eb | 1464 | |
840cb59c | 1465 | health_code_update(); |
099e26bd | 1466 | } |
099e26bd DG |
1467 | } |
1468 | ||
139ac872 | 1469 | exit: |
099e26bd | 1470 | error: |
5eb91c98 | 1471 | lttng_poll_clean(&events); |
76d7553f | 1472 | error_poll_create: |
6993eeb3 | 1473 | error_testpoint: |
6620da75 DG |
1474 | utils_close_pipe(apps_cmd_pipe); |
1475 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1476 | ||
1477 | /* | |
1478 | * We don't clean the UST app hash table here since already registered | |
1479 | * applications can still be controlled so let them be until the session | |
1480 | * daemon dies or the applications stop. | |
1481 | */ | |
1482 | ||
139ac872 | 1483 | if (err) { |
840cb59c | 1484 | health_error(); |
139ac872 MD |
1485 | ERR("Health error occurred in %s", __func__); |
1486 | } | |
8782cc74 | 1487 | health_unregister(health_sessiond); |
76d7553f | 1488 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1489 | rcu_thread_offline(); |
1490 | rcu_unregister_thread(); | |
099e26bd DG |
1491 | return NULL; |
1492 | } | |
1493 | ||
d0b96690 | 1494 | /* |
d88aee68 DG |
1495 | * Send a socket to a thread This is called from the dispatch UST registration |
1496 | * thread once all sockets are set for the application. | |
d0b96690 | 1497 | * |
b85dc84c DG |
1498 | * The sock value can be invalid, we don't really care, the thread will handle |
1499 | * it and make the necessary cleanup if so. | |
1500 | * | |
d0b96690 DG |
1501 | * On success, return 0 else a negative value being the errno message of the |
1502 | * write(). | |
1503 | */ | |
d88aee68 | 1504 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1505 | { |
6cd525e8 | 1506 | ssize_t ret; |
d0b96690 | 1507 | |
b85dc84c DG |
1508 | /* |
1509 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1510 | * before calling this function being a shutdown state of the thread. | |
1511 | */ | |
1512 | if (fd < 0) { | |
1513 | ret = -EBADF; | |
1514 | goto error; | |
1515 | } | |
d0b96690 | 1516 | |
6cd525e8 MD |
1517 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1518 | if (ret < sizeof(sock)) { | |
d88aee68 | 1519 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1520 | if (ret < 0) { |
1521 | ret = -errno; | |
1522 | } | |
1523 | goto error; | |
1524 | } | |
1525 | ||
1526 | /* All good. Don't send back the write positive ret value. */ | |
1527 | ret = 0; | |
1528 | error: | |
6cd525e8 | 1529 | return (int) ret; |
d0b96690 DG |
1530 | } |
1531 | ||
f45e313d DG |
1532 | /* |
1533 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1534 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1535 | * notify socket is never received. | |
1536 | */ | |
1537 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1538 | { | |
1539 | int ret, nb_fd = 0, i; | |
1540 | unsigned int fd_added = 0; | |
1541 | struct lttng_poll_event events; | |
1542 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1543 | ||
1544 | assert(wait_queue); | |
1545 | ||
1546 | lttng_poll_init(&events); | |
1547 | ||
1548 | /* Just skip everything for an empty queue. */ | |
1549 | if (!wait_queue->count) { | |
1550 | goto end; | |
1551 | } | |
1552 | ||
1553 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1554 | if (ret < 0) { | |
1555 | goto error_create; | |
1556 | } | |
1557 | ||
1558 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1559 | &wait_queue->head, head) { | |
1560 | assert(wait_node->app); | |
1561 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1562 | LPOLLHUP | LPOLLERR); | |
1563 | if (ret < 0) { | |
1564 | goto error; | |
1565 | } | |
1566 | ||
1567 | fd_added = 1; | |
1568 | } | |
1569 | ||
1570 | if (!fd_added) { | |
1571 | goto end; | |
1572 | } | |
1573 | ||
1574 | /* | |
1575 | * Poll but don't block so we can quickly identify the faulty events and | |
1576 | * clean them afterwards from the wait queue. | |
1577 | */ | |
1578 | ret = lttng_poll_wait(&events, 0); | |
1579 | if (ret < 0) { | |
1580 | goto error; | |
1581 | } | |
1582 | nb_fd = ret; | |
1583 | ||
1584 | for (i = 0; i < nb_fd; i++) { | |
1585 | /* Get faulty FD. */ | |
1586 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1587 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1588 | ||
1589 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1590 | &wait_queue->head, head) { | |
1591 | if (pollfd == wait_node->app->sock && | |
1592 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1593 | cds_list_del(&wait_node->head); | |
1594 | wait_queue->count--; | |
1595 | ust_app_destroy(wait_node->app); | |
1596 | free(wait_node); | |
1597 | break; | |
1598 | } | |
1599 | } | |
1600 | } | |
1601 | ||
1602 | if (nb_fd > 0) { | |
1603 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1604 | } | |
1605 | ||
1606 | end: | |
1607 | lttng_poll_clean(&events); | |
1608 | return; | |
1609 | ||
1610 | error: | |
1611 | lttng_poll_clean(&events); | |
1612 | error_create: | |
1613 | ERR("Unable to sanitize wait queue"); | |
1614 | return; | |
1615 | } | |
1616 | ||
099e26bd DG |
1617 | /* |
1618 | * Dispatch request from the registration threads to the application | |
1619 | * communication thread. | |
1620 | */ | |
1621 | static void *thread_dispatch_ust_registration(void *data) | |
1622 | { | |
12e2b881 | 1623 | int ret, err = -1; |
099e26bd DG |
1624 | struct cds_wfq_node *node; |
1625 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1626 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1627 | struct ust_reg_wait_queue wait_queue = { | |
1628 | .count = 0, | |
1629 | }; | |
d0b96690 | 1630 | |
6c71277b | 1631 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1632 | |
9ad42ec1 MD |
1633 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1634 | goto error_testpoint; | |
1635 | } | |
1636 | ||
12e2b881 MD |
1637 | health_code_update(); |
1638 | ||
f45e313d | 1639 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1640 | |
1641 | DBG("[thread] Dispatch UST command started"); | |
1642 | ||
26c9d55e | 1643 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1644 | health_code_update(); |
1645 | ||
099e26bd DG |
1646 | /* Atomically prepare the queue futex */ |
1647 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1648 | ||
1649 | do { | |
d0b96690 | 1650 | struct ust_app *app = NULL; |
7972aab2 | 1651 | ust_cmd = NULL; |
d0b96690 | 1652 | |
f45e313d DG |
1653 | /* |
1654 | * Make sure we don't have node(s) that have hung up before receiving | |
1655 | * the notify socket. This is to clean the list in order to avoid | |
1656 | * memory leaks from notify socket that are never seen. | |
1657 | */ | |
1658 | sanitize_wait_queue(&wait_queue); | |
1659 | ||
12e2b881 | 1660 | health_code_update(); |
099e26bd DG |
1661 | /* Dequeue command for registration */ |
1662 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1663 | if (node == NULL) { | |
00a17c97 | 1664 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1665 | /* Continue thread execution */ |
1666 | break; | |
1667 | } | |
1668 | ||
1669 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1670 | ||
2f50c8a3 DG |
1671 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1672 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1673 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1674 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1675 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1676 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1677 | |
1678 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1679 | wait_node = zmalloc(sizeof(*wait_node)); | |
1680 | if (!wait_node) { | |
1681 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1682 | ret = close(ust_cmd->sock); |
1683 | if (ret < 0) { | |
1684 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1685 | } | |
51dec90d | 1686 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1687 | free(ust_cmd); |
d0b96690 DG |
1688 | goto error; |
1689 | } | |
1690 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1691 | ||
1692 | /* Create application object if socket is CMD. */ | |
1693 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1694 | ust_cmd->sock); | |
1695 | if (!wait_node->app) { | |
1696 | ret = close(ust_cmd->sock); | |
1697 | if (ret < 0) { | |
1698 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1699 | } |
51dec90d | 1700 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1701 | free(wait_node); |
7972aab2 | 1702 | free(ust_cmd); |
d0b96690 DG |
1703 | continue; |
1704 | } | |
1705 | /* | |
1706 | * Add application to the wait queue so we can set the notify | |
1707 | * socket before putting this object in the global ht. | |
1708 | */ | |
f45e313d DG |
1709 | cds_list_add(&wait_node->head, &wait_queue.head); |
1710 | wait_queue.count++; | |
d0b96690 | 1711 | |
7972aab2 | 1712 | free(ust_cmd); |
d0b96690 DG |
1713 | /* |
1714 | * We have to continue here since we don't have the notify | |
1715 | * socket and the application MUST be added to the hash table | |
1716 | * only at that moment. | |
1717 | */ | |
1718 | continue; | |
1719 | } else { | |
1720 | /* | |
1721 | * Look for the application in the local wait queue and set the | |
1722 | * notify socket if found. | |
1723 | */ | |
d88aee68 | 1724 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1725 | &wait_queue.head, head) { |
12e2b881 | 1726 | health_code_update(); |
d0b96690 DG |
1727 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1728 | wait_node->app->notify_sock = ust_cmd->sock; | |
1729 | cds_list_del(&wait_node->head); | |
f45e313d | 1730 | wait_queue.count--; |
d0b96690 DG |
1731 | app = wait_node->app; |
1732 | free(wait_node); | |
1733 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1734 | break; | |
1735 | } | |
1736 | } | |
020d7f60 DG |
1737 | |
1738 | /* | |
1739 | * With no application at this stage the received socket is | |
1740 | * basically useless so close it before we free the cmd data | |
1741 | * structure for good. | |
1742 | */ | |
1743 | if (!app) { | |
1744 | ret = close(ust_cmd->sock); | |
1745 | if (ret < 0) { | |
1746 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1747 | } | |
51dec90d | 1748 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1749 | } |
7972aab2 | 1750 | free(ust_cmd); |
d0b96690 DG |
1751 | } |
1752 | ||
1753 | if (app) { | |
d0b96690 DG |
1754 | /* |
1755 | * @session_lock_list | |
1756 | * | |
1757 | * Lock the global session list so from the register up to the | |
1758 | * registration done message, no thread can see the application | |
1759 | * and change its state. | |
1760 | */ | |
1761 | session_lock_list(); | |
1762 | rcu_read_lock(); | |
d88aee68 | 1763 | |
d0b96690 DG |
1764 | /* |
1765 | * Add application to the global hash table. This needs to be | |
1766 | * done before the update to the UST registry can locate the | |
1767 | * application. | |
1768 | */ | |
1769 | ust_app_add(app); | |
d88aee68 DG |
1770 | |
1771 | /* Set app version. This call will print an error if needed. */ | |
1772 | (void) ust_app_version(app); | |
1773 | ||
1774 | /* Send notify socket through the notify pipe. */ | |
1775 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1776 | app->notify_sock); | |
1777 | if (ret < 0) { | |
1778 | rcu_read_unlock(); | |
1779 | session_unlock_list(); | |
b85dc84c DG |
1780 | /* |
1781 | * No notify thread, stop the UST tracing. However, this is | |
1782 | * not an internal error of the this thread thus setting | |
1783 | * the health error code to a normal exit. | |
1784 | */ | |
1785 | err = 0; | |
d88aee68 | 1786 | goto error; |
6620da75 | 1787 | } |
d88aee68 | 1788 | |
d0b96690 DG |
1789 | /* |
1790 | * Update newly registered application with the tracing | |
1791 | * registry info already enabled information. | |
1792 | */ | |
1793 | update_ust_app(app->sock); | |
d88aee68 DG |
1794 | |
1795 | /* | |
1796 | * Don't care about return value. Let the manage apps threads | |
1797 | * handle app unregistration upon socket close. | |
1798 | */ | |
1799 | (void) ust_app_register_done(app->sock); | |
1800 | ||
1801 | /* | |
1802 | * Even if the application socket has been closed, send the app | |
1803 | * to the thread and unregistration will take place at that | |
1804 | * place. | |
1805 | */ | |
1806 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1807 | if (ret < 0) { |
d88aee68 DG |
1808 | rcu_read_unlock(); |
1809 | session_unlock_list(); | |
b85dc84c DG |
1810 | /* |
1811 | * No apps. thread, stop the UST tracing. However, this is | |
1812 | * not an internal error of the this thread thus setting | |
1813 | * the health error code to a normal exit. | |
1814 | */ | |
1815 | err = 0; | |
d88aee68 | 1816 | goto error; |
d0b96690 | 1817 | } |
d88aee68 | 1818 | |
d0b96690 DG |
1819 | rcu_read_unlock(); |
1820 | session_unlock_list(); | |
099e26bd | 1821 | } |
099e26bd DG |
1822 | } while (node != NULL); |
1823 | ||
12e2b881 | 1824 | health_poll_entry(); |
099e26bd DG |
1825 | /* Futex wait on queue. Blocking call on futex() */ |
1826 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1827 | health_poll_exit(); |
099e26bd | 1828 | } |
12e2b881 MD |
1829 | /* Normal exit, no error */ |
1830 | err = 0; | |
099e26bd DG |
1831 | |
1832 | error: | |
d88aee68 DG |
1833 | /* Clean up wait queue. */ |
1834 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1835 | &wait_queue.head, head) { |
d88aee68 | 1836 | cds_list_del(&wait_node->head); |
f45e313d | 1837 | wait_queue.count--; |
d88aee68 DG |
1838 | free(wait_node); |
1839 | } | |
1840 | ||
9ad42ec1 | 1841 | error_testpoint: |
099e26bd | 1842 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1843 | if (err) { |
1844 | health_error(); | |
1845 | ERR("Health error occurred in %s", __func__); | |
1846 | } | |
8782cc74 | 1847 | health_unregister(health_sessiond); |
099e26bd DG |
1848 | return NULL; |
1849 | } | |
1850 | ||
1851 | /* | |
1852 | * This thread manage application registration. | |
1853 | */ | |
1854 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1855 | { |
139ac872 | 1856 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1857 | uint32_t revents, nb_fd; |
1858 | struct lttng_poll_event events; | |
099e26bd DG |
1859 | /* |
1860 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1861 | * freed in the manage apps thread. | |
1862 | */ | |
1863 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1864 | |
099e26bd | 1865 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1866 | |
6c71277b | 1867 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1868 | |
e547b070 | 1869 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
1870 | goto error_testpoint; |
1871 | } | |
8ac94142 | 1872 | |
1d4b027a DG |
1873 | ret = lttcomm_listen_unix_sock(apps_sock); |
1874 | if (ret < 0) { | |
76d7553f | 1875 | goto error_listen; |
1d4b027a DG |
1876 | } |
1877 | ||
5eb91c98 DG |
1878 | /* |
1879 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1880 | * more will be added to this poll set. | |
1881 | */ | |
d0b96690 | 1882 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1883 | if (ret < 0) { |
76d7553f | 1884 | goto error_create_poll; |
5eb91c98 | 1885 | } |
273ea72c | 1886 | |
5eb91c98 DG |
1887 | /* Add the application registration socket */ |
1888 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1889 | if (ret < 0) { | |
76d7553f | 1890 | goto error_poll_add; |
5eb91c98 | 1891 | } |
273ea72c | 1892 | |
1d4b027a | 1893 | /* Notify all applications to register */ |
0fdd1e2c DG |
1894 | ret = notify_ust_apps(1); |
1895 | if (ret < 0) { | |
1896 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1897 | "Execution continues but there might be problem for already\n" |
1898 | "running applications that wishes to register."); | |
0fdd1e2c | 1899 | } |
1d4b027a DG |
1900 | |
1901 | while (1) { | |
1902 | DBG("Accepting application registration"); | |
273ea72c DG |
1903 | |
1904 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1905 | restart: |
a78af745 | 1906 | health_poll_entry(); |
5eb91c98 | 1907 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1908 | health_poll_exit(); |
273ea72c | 1909 | if (ret < 0) { |
88f2b785 MD |
1910 | /* |
1911 | * Restart interrupted system call. | |
1912 | */ | |
1913 | if (errno == EINTR) { | |
1914 | goto restart; | |
1915 | } | |
273ea72c DG |
1916 | goto error; |
1917 | } | |
1918 | ||
0d9c5d77 DG |
1919 | nb_fd = ret; |
1920 | ||
5eb91c98 | 1921 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1922 | health_code_update(); |
139ac872 | 1923 | |
5eb91c98 DG |
1924 | /* Fetch once the poll data */ |
1925 | revents = LTTNG_POLL_GETEV(&events, i); | |
1926 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1927 | |
5eb91c98 | 1928 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1929 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1930 | if (ret) { |
139ac872 MD |
1931 | err = 0; |
1932 | goto exit; | |
90014c57 | 1933 | } |
1d4b027a | 1934 | |
5eb91c98 DG |
1935 | /* Event on the registration socket */ |
1936 | if (pollfd == apps_sock) { | |
1937 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1938 | ERR("Register apps socket poll error"); | |
1939 | goto error; | |
1940 | } else if (revents & LPOLLIN) { | |
1941 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1942 | if (sock < 0) { | |
1943 | goto error; | |
1944 | } | |
099e26bd | 1945 | |
16c5c8fa DG |
1946 | /* |
1947 | * Set socket timeout for both receiving and ending. | |
1948 | * app_socket_timeout is in seconds, whereas | |
1949 | * lttcomm_setsockopt_rcv_timeout and | |
1950 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1951 | * parameter. | |
1952 | */ | |
1953 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1954 | app_socket_timeout * 1000); | |
1955 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1956 | app_socket_timeout * 1000); | |
1957 | ||
b662582b DG |
1958 | /* |
1959 | * Set the CLOEXEC flag. Return code is useless because | |
1960 | * either way, the show must go on. | |
1961 | */ | |
1962 | (void) utils_set_fd_cloexec(sock); | |
1963 | ||
5eb91c98 | 1964 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1965 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1966 | if (ust_cmd == NULL) { |
76d7553f | 1967 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1968 | goto error; |
1969 | } | |
1d4b027a | 1970 | |
5eb91c98 DG |
1971 | /* |
1972 | * Using message-based transmissions to ensure we don't | |
1973 | * have to deal with partially received messages. | |
1974 | */ | |
4063050c MD |
1975 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1976 | if (ret < 0) { | |
1977 | ERR("Exhausted file descriptors allowed for applications."); | |
1978 | free(ust_cmd); | |
1979 | ret = close(sock); | |
1980 | if (ret) { | |
1981 | PERROR("close"); | |
1982 | } | |
1983 | sock = -1; | |
1984 | continue; | |
1985 | } | |
d88aee68 | 1986 | |
840cb59c | 1987 | health_code_update(); |
d0b96690 DG |
1988 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1989 | if (ret < 0) { | |
5eb91c98 | 1990 | free(ust_cmd); |
d0b96690 | 1991 | /* Close socket of the application. */ |
76d7553f MD |
1992 | ret = close(sock); |
1993 | if (ret) { | |
1994 | PERROR("close"); | |
1995 | } | |
4063050c | 1996 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1997 | sock = -1; |
5eb91c98 DG |
1998 | continue; |
1999 | } | |
840cb59c | 2000 | health_code_update(); |
099e26bd | 2001 | |
5eb91c98 | 2002 | ust_cmd->sock = sock; |
34a2494f | 2003 | sock = -1; |
099e26bd | 2004 | |
5eb91c98 DG |
2005 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2006 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2007 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2008 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2009 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2010 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2011 | |
5eb91c98 DG |
2012 | /* |
2013 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2014 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
2015 | */ |
2016 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
2017 | ||
2018 | /* | |
2019 | * Wake the registration queue futex. Implicit memory | |
2020 | * barrier with the exchange in cds_wfq_enqueue. | |
2021 | */ | |
2022 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2023 | } | |
2024 | } | |
90014c57 | 2025 | } |
1d4b027a DG |
2026 | } |
2027 | ||
139ac872 | 2028 | exit: |
1d4b027a | 2029 | error: |
0fdd1e2c DG |
2030 | /* Notify that the registration thread is gone */ |
2031 | notify_ust_apps(0); | |
2032 | ||
a4b35e07 | 2033 | if (apps_sock >= 0) { |
76d7553f MD |
2034 | ret = close(apps_sock); |
2035 | if (ret) { | |
2036 | PERROR("close"); | |
2037 | } | |
a4b35e07 | 2038 | } |
46c3f085 | 2039 | if (sock >= 0) { |
76d7553f MD |
2040 | ret = close(sock); |
2041 | if (ret) { | |
2042 | PERROR("close"); | |
2043 | } | |
4063050c | 2044 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2045 | } |
273ea72c | 2046 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2047 | |
76d7553f | 2048 | error_poll_add: |
5eb91c98 | 2049 | lttng_poll_clean(&events); |
76d7553f MD |
2050 | error_listen: |
2051 | error_create_poll: | |
6993eeb3 | 2052 | error_testpoint: |
76d7553f | 2053 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2054 | if (err) { |
2055 | health_error(); | |
2056 | ERR("Health error occurred in %s", __func__); | |
2057 | } | |
8782cc74 | 2058 | health_unregister(health_sessiond); |
5eb91c98 | 2059 | |
1d4b027a DG |
2060 | return NULL; |
2061 | } | |
2062 | ||
8c0faa1d | 2063 | /* |
3bd1e081 | 2064 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2065 | * exec or it will fails. |
8c0faa1d | 2066 | */ |
3bd1e081 | 2067 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2068 | { |
a23ec3a7 | 2069 | int ret, clock_ret; |
ee0b0061 DG |
2070 | struct timespec timeout; |
2071 | ||
a23ec3a7 DG |
2072 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2073 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2074 | |
a23ec3a7 DG |
2075 | /* Setup pthread condition */ |
2076 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2077 | if (ret != 0) { | |
2078 | errno = ret; | |
2079 | PERROR("pthread_condattr_init consumer data"); | |
2080 | goto error; | |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2085 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2086 | * for a more details and how we noticed it. | |
2087 | */ | |
2088 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2089 | if (ret != 0) { | |
2090 | errno = ret; | |
2091 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2092 | goto error; |
2093 | } | |
8c0faa1d | 2094 | |
a23ec3a7 DG |
2095 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2096 | if (ret != 0) { | |
2097 | errno = ret; | |
2098 | PERROR("pthread_cond_init consumer data"); | |
2099 | goto error; | |
2100 | } | |
2101 | ||
2102 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2103 | consumer_data); | |
8c0faa1d | 2104 | if (ret != 0) { |
3bd1e081 | 2105 | PERROR("pthread_create consumer"); |
ee0b0061 | 2106 | ret = -1; |
8c0faa1d DG |
2107 | goto error; |
2108 | } | |
2109 | ||
a23ec3a7 DG |
2110 | /* We are about to wait on a pthread condition */ |
2111 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2112 | ||
ee0b0061 | 2113 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2114 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2115 | /* | |
2116 | * Set the timeout for the condition timed wait even if the clock gettime | |
2117 | * call fails since we might loop on that call and we want to avoid to | |
2118 | * increment the timeout too many times. | |
2119 | */ | |
2120 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2121 | ||
2122 | /* | |
2123 | * The following loop COULD be skipped in some conditions so this is why we | |
2124 | * set ret to 0 in order to make sure at least one round of the loop is | |
2125 | * done. | |
2126 | */ | |
2127 | ret = 0; | |
2128 | ||
2129 | /* | |
2130 | * Loop until the condition is reached or when a timeout is reached. Note | |
2131 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2132 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2133 | * possible. This loop does not take any chances and works with both of | |
2134 | * them. | |
2135 | */ | |
2136 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2137 | if (clock_ret < 0) { | |
2138 | PERROR("clock_gettime spawn consumer"); | |
2139 | /* Infinite wait for the consumerd thread to be ready */ | |
2140 | ret = pthread_cond_wait(&consumer_data->cond, | |
2141 | &consumer_data->cond_mutex); | |
2142 | } else { | |
2143 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2144 | &consumer_data->cond_mutex, &timeout); | |
2145 | } | |
ee0b0061 | 2146 | } |
8c0faa1d | 2147 | |
a23ec3a7 DG |
2148 | /* Release the pthread condition */ |
2149 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2150 | ||
2151 | if (ret != 0) { | |
2152 | errno = ret; | |
2153 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
2154 | /* |
2155 | * Call has timed out so we kill the kconsumerd_thread and return | |
2156 | * an error. | |
2157 | */ | |
a23ec3a7 DG |
2158 | ERR("Condition timed out. The consumer thread was never ready." |
2159 | " Killing it"); | |
3bd1e081 | 2160 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 2161 | if (ret < 0) { |
3bd1e081 | 2162 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2163 | } |
2164 | } else { | |
a23ec3a7 | 2165 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
2166 | } |
2167 | goto error; | |
2168 | } | |
2169 | ||
3bd1e081 MD |
2170 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2171 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2172 | ERR("Consumerd did not start"); |
3bd1e081 | 2173 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2174 | goto error; |
2175 | } | |
3bd1e081 | 2176 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2177 | |
8c0faa1d DG |
2178 | return 0; |
2179 | ||
2180 | error: | |
2181 | return ret; | |
2182 | } | |
2183 | ||
d9800920 | 2184 | /* |
3bd1e081 | 2185 | * Join consumer thread |
d9800920 | 2186 | */ |
3bd1e081 | 2187 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2188 | { |
2189 | void *status; | |
cf3af59e | 2190 | |
e8209f6b DG |
2191 | /* Consumer pid must be a real one. */ |
2192 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2193 | int ret; |
3bd1e081 | 2194 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2195 | if (ret) { |
3bd1e081 | 2196 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2197 | return ret; |
2198 | } | |
3bd1e081 | 2199 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2200 | } else { |
2201 | return 0; | |
2202 | } | |
2203 | } | |
2204 | ||
8c0faa1d | 2205 | /* |
3bd1e081 | 2206 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2207 | * |
d063d709 | 2208 | * Return pid if successful else -1. |
8c0faa1d | 2209 | */ |
3bd1e081 | 2210 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2211 | { |
2212 | int ret; | |
2213 | pid_t pid; | |
94c55f17 | 2214 | const char *consumer_to_use; |
53086306 | 2215 | const char *verbosity; |
94c55f17 | 2216 | struct stat st; |
8c0faa1d | 2217 | |
3bd1e081 | 2218 | DBG("Spawning consumerd"); |
c49dc785 | 2219 | |
8c0faa1d DG |
2220 | pid = fork(); |
2221 | if (pid == 0) { | |
2222 | /* | |
3bd1e081 | 2223 | * Exec consumerd. |
8c0faa1d | 2224 | */ |
daee5345 | 2225 | if (opt_verbose_consumer) { |
53086306 DG |
2226 | verbosity = "--verbose"; |
2227 | } else { | |
2228 | verbosity = "--quiet"; | |
2229 | } | |
3bd1e081 MD |
2230 | switch (consumer_data->type) { |
2231 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2232 | /* |
c7704d57 DG |
2233 | * Find out which consumerd to execute. We will first try the |
2234 | * 64-bit path, then the sessiond's installation directory, and | |
2235 | * fallback on the 32-bit one, | |
94c55f17 | 2236 | */ |
63a799e8 AM |
2237 | DBG3("Looking for a kernel consumer at these locations:"); |
2238 | DBG3(" 1) %s", consumerd64_bin); | |
2239 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2240 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2241 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2242 | DBG3("Found location #1"); |
94c55f17 | 2243 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2244 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2245 | DBG3("Found location #2"); |
94c55f17 | 2246 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2247 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2248 | DBG3("Found location #3"); |
eb1e0bd4 | 2249 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2250 | } else { |
63a799e8 | 2251 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2252 | break; |
2253 | } | |
2254 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
2255 | execl(consumer_to_use, | |
2256 | "lttng-consumerd", verbosity, "-k", | |
2257 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2258 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2259 | "--group", tracing_group_name, |
94c55f17 | 2260 | NULL); |
3bd1e081 | 2261 | break; |
7753dea8 MD |
2262 | case LTTNG_CONSUMER64_UST: |
2263 | { | |
b1e0b6b6 | 2264 | char *tmpnew = NULL; |
8f4905da MD |
2265 | |
2266 | if (consumerd64_libdir[0] != '\0') { | |
2267 | char *tmp; | |
2268 | size_t tmplen; | |
2269 | ||
2270 | tmp = getenv("LD_LIBRARY_PATH"); | |
2271 | if (!tmp) { | |
2272 | tmp = ""; | |
2273 | } | |
2274 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2275 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2276 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2277 | if (!tmpnew) { | |
2278 | ret = -ENOMEM; | |
2279 | goto error; | |
2280 | } | |
2281 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2282 | strcat(tmpnew, consumerd64_libdir); | |
2283 | if (tmp[0] != '\0') { | |
2284 | strcat(tmpnew, ":"); | |
2285 | strcat(tmpnew, tmp); | |
2286 | } | |
2287 | ret = putenv(tmpnew); | |
2288 | if (ret) { | |
2289 | ret = -errno; | |
c6f76da9 | 2290 | free(tmpnew); |
8f4905da MD |
2291 | goto error; |
2292 | } | |
2293 | } | |
94c55f17 | 2294 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2295 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2296 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2297 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2298 | "--group", tracing_group_name, |
7753dea8 | 2299 | NULL); |
8f4905da MD |
2300 | if (consumerd64_libdir[0] != '\0') { |
2301 | free(tmpnew); | |
2302 | } | |
2303 | if (ret) { | |
2304 | goto error; | |
2305 | } | |
3bd1e081 | 2306 | break; |
7753dea8 MD |
2307 | } |
2308 | case LTTNG_CONSUMER32_UST: | |
2309 | { | |
937dde8e | 2310 | char *tmpnew = NULL; |
8f4905da MD |
2311 | |
2312 | if (consumerd32_libdir[0] != '\0') { | |
2313 | char *tmp; | |
2314 | size_t tmplen; | |
2315 | ||
2316 | tmp = getenv("LD_LIBRARY_PATH"); | |
2317 | if (!tmp) { | |
2318 | tmp = ""; | |
2319 | } | |
2320 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2321 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2322 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2323 | if (!tmpnew) { | |
2324 | ret = -ENOMEM; | |
2325 | goto error; | |
2326 | } | |
2327 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2328 | strcat(tmpnew, consumerd32_libdir); | |
2329 | if (tmp[0] != '\0') { | |
2330 | strcat(tmpnew, ":"); | |
2331 | strcat(tmpnew, tmp); | |
2332 | } | |
2333 | ret = putenv(tmpnew); | |
2334 | if (ret) { | |
2335 | ret = -errno; | |
c6f76da9 | 2336 | free(tmpnew); |
8f4905da MD |
2337 | goto error; |
2338 | } | |
2339 | } | |
94c55f17 | 2340 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2341 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2342 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2343 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2344 | "--group", tracing_group_name, |
7753dea8 | 2345 | NULL); |
8f4905da MD |
2346 | if (consumerd32_libdir[0] != '\0') { |
2347 | free(tmpnew); | |
2348 | } | |
2349 | if (ret) { | |
2350 | goto error; | |
2351 | } | |
7753dea8 MD |
2352 | break; |
2353 | } | |
3bd1e081 | 2354 | default: |
76d7553f | 2355 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2356 | exit(EXIT_FAILURE); |
2357 | } | |
8c0faa1d | 2358 | if (errno != 0) { |
76d7553f | 2359 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2360 | } |
2361 | exit(EXIT_FAILURE); | |
2362 | } else if (pid > 0) { | |
2363 | ret = pid; | |
8c0faa1d | 2364 | } else { |
76d7553f | 2365 | PERROR("start consumer fork"); |
8c0faa1d | 2366 | ret = -errno; |
8c0faa1d | 2367 | } |
8f4905da | 2368 | error: |
8c0faa1d DG |
2369 | return ret; |
2370 | } | |
2371 | ||
693bd40b | 2372 | /* |
3bd1e081 | 2373 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2374 | */ |
3bd1e081 | 2375 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2376 | { |
c617c0c6 | 2377 | int ret; |
edb8b045 DG |
2378 | |
2379 | /* | |
2380 | * Set the listen() state on the socket since there is a possible race | |
2381 | * between the exec() of the consumer daemon and this call if place in the | |
2382 | * consumer thread. See bug #366 for more details. | |
2383 | */ | |
2384 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2385 | if (ret < 0) { | |
2386 | goto error; | |
2387 | } | |
693bd40b | 2388 | |
3bd1e081 MD |
2389 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2390 | if (consumer_data->pid != 0) { | |
2391 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2392 | goto end; |
2393 | } | |
693bd40b | 2394 | |
3bd1e081 | 2395 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2396 | if (ret < 0) { |
3bd1e081 MD |
2397 | ERR("Spawning consumerd failed"); |
2398 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2399 | goto error; |
693bd40b | 2400 | } |
c49dc785 | 2401 | |
3bd1e081 MD |
2402 | /* Setting up the consumer_data pid */ |
2403 | consumer_data->pid = ret; | |
48842b30 | 2404 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2405 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2406 | |
3bd1e081 MD |
2407 | DBG2("Spawning consumer control thread"); |
2408 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2409 | if (ret < 0) { |
3bd1e081 | 2410 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2411 | goto error; |
2412 | } | |
2413 | ||
c49dc785 | 2414 | end: |
693bd40b DG |
2415 | return 0; |
2416 | ||
2417 | error: | |
331744e3 | 2418 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2419 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2420 | int err; |
2421 | ||
edb8b045 DG |
2422 | err = close(consumer_data->err_sock); |
2423 | if (err < 0) { | |
2424 | PERROR("close consumer data error socket"); | |
2425 | } | |
2426 | } | |
693bd40b DG |
2427 | return ret; |
2428 | } | |
2429 | ||
b73401da | 2430 | /* |
096102bd | 2431 | * Setup necessary data for kernel tracer action. |
b73401da | 2432 | */ |
096102bd | 2433 | static int init_kernel_tracer(void) |
b73401da DG |
2434 | { |
2435 | int ret; | |
b73401da | 2436 | |
096102bd DG |
2437 | /* Modprobe lttng kernel modules */ |
2438 | ret = modprobe_lttng_control(); | |
b73401da | 2439 | if (ret < 0) { |
b73401da DG |
2440 | goto error; |
2441 | } | |
2442 | ||
096102bd DG |
2443 | /* Open debugfs lttng */ |
2444 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2445 | if (kernel_tracer_fd < 0) { | |
2446 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2447 | ret = -1; |
2448 | goto error_open; | |
54d01ffb DG |
2449 | } |
2450 | ||
2f77fc4b DG |
2451 | /* Validate kernel version */ |
2452 | ret = kernel_validate_version(kernel_tracer_fd); | |
2453 | if (ret < 0) { | |
2454 | goto error_version; | |
b551a063 | 2455 | } |
54d01ffb | 2456 | |
2f77fc4b DG |
2457 | ret = modprobe_lttng_data(); |
2458 | if (ret < 0) { | |
2459 | goto error_modules; | |
54d01ffb DG |
2460 | } |
2461 | ||
2f77fc4b DG |
2462 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2463 | return 0; | |
2464 | ||
2465 | error_version: | |
2466 | modprobe_remove_lttng_control(); | |
2467 | ret = close(kernel_tracer_fd); | |
2468 | if (ret) { | |
2469 | PERROR("close"); | |
b551a063 | 2470 | } |
2f77fc4b | 2471 | kernel_tracer_fd = -1; |
f73fabfd | 2472 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2473 | |
2f77fc4b DG |
2474 | error_modules: |
2475 | ret = close(kernel_tracer_fd); | |
2476 | if (ret) { | |
2477 | PERROR("close"); | |
b551a063 | 2478 | } |
54d01ffb | 2479 | |
2f77fc4b DG |
2480 | error_open: |
2481 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2482 | |
2483 | error: | |
2f77fc4b DG |
2484 | WARN("No kernel tracer available"); |
2485 | kernel_tracer_fd = -1; | |
2486 | if (!is_root) { | |
f73fabfd | 2487 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2488 | } else { |
f73fabfd | 2489 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2490 | } |
54d01ffb DG |
2491 | } |
2492 | ||
2f77fc4b | 2493 | |
54d01ffb | 2494 | /* |
2f77fc4b DG |
2495 | * Copy consumer output from the tracing session to the domain session. The |
2496 | * function also applies the right modification on a per domain basis for the | |
2497 | * trace files destination directory. | |
36b588ed MD |
2498 | * |
2499 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2500 | */ |
2f77fc4b | 2501 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2502 | { |
2503 | int ret; | |
2f77fc4b DG |
2504 | const char *dir_name; |
2505 | struct consumer_output *consumer; | |
2506 | ||
2507 | assert(session); | |
2508 | assert(session->consumer); | |
54d01ffb | 2509 | |
b551a063 DG |
2510 | switch (domain) { |
2511 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2512 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2513 | /* |
2514 | * XXX: We should audit the session creation and what this function | |
2515 | * does "extra" in order to avoid a destroy since this function is used | |
2516 | * in the domain session creation (kernel and ust) only. Same for UST | |
2517 | * domain. | |
2518 | */ | |
2519 | if (session->kernel_session->consumer) { | |
2520 | consumer_destroy_output(session->kernel_session->consumer); | |
2521 | } | |
2f77fc4b DG |
2522 | session->kernel_session->consumer = |
2523 | consumer_copy_output(session->consumer); | |
2524 | /* Ease our life a bit for the next part */ | |
2525 | consumer = session->kernel_session->consumer; | |
2526 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2527 | break; |
f20baf8e | 2528 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2529 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2530 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2531 | if (session->ust_session->consumer) { |
2532 | consumer_destroy_output(session->ust_session->consumer); | |
2533 | } | |
2f77fc4b DG |
2534 | session->ust_session->consumer = |
2535 | consumer_copy_output(session->consumer); | |
2536 | /* Ease our life a bit for the next part */ | |
2537 | consumer = session->ust_session->consumer; | |
2538 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2539 | break; |
2540 | default: | |
f73fabfd | 2541 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2542 | goto error; |
2543 | } | |
2544 | ||
2f77fc4b | 2545 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2546 | strncat(consumer->subdir, dir_name, |
2547 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2548 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2549 | ||
f73fabfd | 2550 | ret = LTTNG_OK; |
54d01ffb DG |
2551 | |
2552 | error: | |
2553 | return ret; | |
2554 | } | |
2555 | ||
00e2e675 | 2556 | /* |
2f77fc4b | 2557 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2558 | * |
2559 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2560 | */ |
2f77fc4b DG |
2561 | static int create_ust_session(struct ltt_session *session, |
2562 | struct lttng_domain *domain) | |
00e2e675 DG |
2563 | { |
2564 | int ret; | |
2f77fc4b | 2565 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2566 | |
a4b92340 | 2567 | assert(session); |
2f77fc4b DG |
2568 | assert(domain); |
2569 | assert(session->consumer); | |
a4b92340 | 2570 | |
2f77fc4b | 2571 | switch (domain->type) { |
f20baf8e | 2572 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2573 | case LTTNG_DOMAIN_UST: |
2574 | break; | |
2575 | default: | |
2576 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2577 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2578 | goto error; |
2579 | } | |
2580 | ||
2f77fc4b DG |
2581 | DBG("Creating UST session"); |
2582 | ||
dec56f6c | 2583 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2584 | if (lus == NULL) { |
f73fabfd | 2585 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2586 | goto error; |
2587 | } | |
2588 | ||
2f77fc4b DG |
2589 | lus->uid = session->uid; |
2590 | lus->gid = session->gid; | |
2bba9e53 | 2591 | lus->output_traces = session->output_traces; |
27babd3a | 2592 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2593 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2594 | session->ust_session = lus; |
00e2e675 | 2595 | |
2f77fc4b DG |
2596 | /* Copy session output to the newly created UST session */ |
2597 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2598 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2599 | goto error; |
2600 | } | |
2601 | ||
f73fabfd | 2602 | return LTTNG_OK; |
00e2e675 DG |
2603 | |
2604 | error: | |
2f77fc4b DG |
2605 | free(lus); |
2606 | session->ust_session = NULL; | |
00e2e675 DG |
2607 | return ret; |
2608 | } | |
2609 | ||
2610 | /* | |
2f77fc4b | 2611 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2612 | */ |
2f77fc4b | 2613 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2614 | { |
2615 | int ret; | |
a4b92340 | 2616 | |
2f77fc4b | 2617 | DBG("Creating kernel session"); |
00e2e675 | 2618 | |
2f77fc4b DG |
2619 | ret = kernel_create_session(session, kernel_tracer_fd); |
2620 | if (ret < 0) { | |
f73fabfd | 2621 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2622 | goto error; |
2623 | } | |
2624 | ||
2f77fc4b DG |
2625 | /* Code flow safety */ |
2626 | assert(session->kernel_session); | |
2627 | ||
2628 | /* Copy session output to the newly created Kernel session */ | |
2629 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2630 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2631 | goto error; |
2632 | } | |
2633 | ||
2f77fc4b DG |
2634 | /* Create directory(ies) on local filesystem. */ |
2635 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2636 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2637 | ret = run_as_mkdir_recursive( | |
2638 | session->kernel_session->consumer->dst.trace_path, | |
2639 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2640 | if (ret < 0) { | |
2641 | if (ret != -EEXIST) { | |
2642 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2643 | goto error; |
2644 | } | |
00e2e675 | 2645 | } |
2f77fc4b | 2646 | } |
00e2e675 | 2647 | |
2f77fc4b DG |
2648 | session->kernel_session->uid = session->uid; |
2649 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2650 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2651 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2652 | |
f73fabfd | 2653 | return LTTNG_OK; |
00e2e675 | 2654 | |
2f77fc4b DG |
2655 | error: |
2656 | trace_kernel_destroy_session(session->kernel_session); | |
2657 | session->kernel_session = NULL; | |
2658 | return ret; | |
2659 | } | |
00e2e675 | 2660 | |
2f77fc4b DG |
2661 | /* |
2662 | * Count number of session permitted by uid/gid. | |
2663 | */ | |
2664 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2665 | { | |
2666 | unsigned int i = 0; | |
2667 | struct ltt_session *session; | |
07424f16 | 2668 | |
2f77fc4b DG |
2669 | DBG("Counting number of available session for UID %d GID %d", |
2670 | uid, gid); | |
2671 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2672 | /* |
2f77fc4b | 2673 | * Only list the sessions the user can control. |
00e2e675 | 2674 | */ |
2f77fc4b DG |
2675 | if (!session_access_ok(session, uid, gid)) { |
2676 | continue; | |
2677 | } | |
2678 | i++; | |
a4b92340 | 2679 | } |
2f77fc4b | 2680 | return i; |
00e2e675 DG |
2681 | } |
2682 | ||
54d01ffb DG |
2683 | /* |
2684 | * Process the command requested by the lttng client within the command | |
2685 | * context structure. This function make sure that the return structure (llm) | |
2686 | * is set and ready for transmission before returning. | |
2687 | * | |
2688 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2689 | * |
2690 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2691 | * |
2692 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2693 | */ |
53a80697 MD |
2694 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2695 | int *sock_error) | |
54d01ffb | 2696 | { |
f73fabfd | 2697 | int ret = LTTNG_OK; |
44d3bd01 | 2698 | int need_tracing_session = 1; |
2e09ba09 | 2699 | int need_domain; |
54d01ffb DG |
2700 | |
2701 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2702 | ||
53a80697 MD |
2703 | *sock_error = 0; |
2704 | ||
2e09ba09 MD |
2705 | switch (cmd_ctx->lsm->cmd_type) { |
2706 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2707 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2708 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2709 | case LTTNG_DESTROY_SESSION: |
2710 | case LTTNG_LIST_SESSIONS: | |
2711 | case LTTNG_LIST_DOMAINS: | |
2712 | case LTTNG_START_TRACE: | |
2713 | case LTTNG_STOP_TRACE: | |
6d805429 | 2714 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2715 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2716 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2717 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2718 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2719 | need_domain = 0; |
3aace903 | 2720 | break; |
2e09ba09 MD |
2721 | default: |
2722 | need_domain = 1; | |
2723 | } | |
2724 | ||
2725 | if (opt_no_kernel && need_domain | |
2726 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2727 | if (!is_root) { |
f73fabfd | 2728 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2729 | } else { |
f73fabfd | 2730 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2731 | } |
4fba7219 DG |
2732 | goto error; |
2733 | } | |
2734 | ||
8d3113b2 DG |
2735 | /* Deny register consumer if we already have a spawned consumer. */ |
2736 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2737 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2738 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2739 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2740 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2741 | goto error; |
2742 | } | |
2743 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2744 | } | |
2745 | ||
54d01ffb DG |
2746 | /* |
2747 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2748 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2749 | * command. |
2750 | */ | |
2751 | switch(cmd_ctx->lsm->cmd_type) { | |
2752 | case LTTNG_LIST_SESSIONS: | |
2753 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2754 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2755 | case LTTNG_LIST_DOMAINS: |
2756 | case LTTNG_LIST_CHANNELS: | |
2757 | case LTTNG_LIST_EVENTS: | |
2758 | break; | |
2759 | default: | |
2760 | /* Setup lttng message with no payload */ | |
2761 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2762 | if (ret < 0) { | |
2763 | /* This label does not try to unlock the session */ | |
2764 | goto init_setup_error; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | /* Commands that DO NOT need a session. */ | |
2769 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2770 | case LTTNG_CREATE_SESSION: |
27babd3a | 2771 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2772 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2773 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2774 | case LTTNG_LIST_SESSIONS: |
2775 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2776 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2777 | need_tracing_session = 0; |
54d01ffb DG |
2778 | break; |
2779 | default: | |
2780 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2781 | /* |
2782 | * We keep the session list lock across _all_ commands | |
2783 | * for now, because the per-session lock does not | |
2784 | * handle teardown properly. | |
2785 | */ | |
74babd95 | 2786 | session_lock_list(); |
54d01ffb DG |
2787 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2788 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2789 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2790 | goto error; |
2791 | } else { | |
2792 | /* Acquire lock for the session */ | |
2793 | session_lock(cmd_ctx->session); | |
2794 | } | |
2795 | break; | |
2796 | } | |
b389abbe | 2797 | |
2e09ba09 MD |
2798 | if (!need_domain) { |
2799 | goto skip_domain; | |
2800 | } | |
a4b92340 | 2801 | |
54d01ffb DG |
2802 | /* |
2803 | * Check domain type for specific "pre-action". | |
2804 | */ | |
2805 | switch (cmd_ctx->lsm->domain.type) { | |
2806 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2807 | if (!is_root) { |
f73fabfd | 2808 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2809 | goto error; |
2810 | } | |
2811 | ||
54d01ffb | 2812 | /* Kernel tracer check */ |
a4b35e07 | 2813 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2814 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2815 | ret = init_kernel_tracer(); |
2816 | if (ret != 0) { | |
54d01ffb DG |
2817 | goto error; |
2818 | } | |
2819 | } | |
5eb91c98 | 2820 | |
5c827ce0 DG |
2821 | /* Consumer is in an ERROR state. Report back to client */ |
2822 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2823 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2824 | goto error; |
2825 | } | |
2826 | ||
54d01ffb | 2827 | /* Need a session for kernel command */ |
44d3bd01 | 2828 | if (need_tracing_session) { |
54d01ffb | 2829 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2830 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2831 | if (ret < 0) { |
f73fabfd | 2832 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2833 | goto error; |
2834 | } | |
b389abbe | 2835 | } |
7d29a247 | 2836 | |
54d01ffb | 2837 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2838 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2839 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2840 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2841 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2842 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2843 | if (ret < 0) { |
f73fabfd | 2844 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2845 | goto error; |
950131af | 2846 | } |
5c827ce0 | 2847 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2848 | } else { |
2849 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2850 | } |
173af62f | 2851 | |
a4b92340 DG |
2852 | /* |
2853 | * The consumer was just spawned so we need to add the socket to | |
2854 | * the consumer output of the session if exist. | |
2855 | */ | |
2856 | ret = consumer_create_socket(&kconsumer_data, | |
2857 | cmd_ctx->session->kernel_session->consumer); | |
2858 | if (ret < 0) { | |
2859 | goto error; | |
173af62f | 2860 | } |
0d0c377a | 2861 | } |
5c827ce0 | 2862 | |
54d01ffb | 2863 | break; |
b9dfb167 | 2864 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2865 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2866 | { |
b51ec5b4 MD |
2867 | if (!ust_app_supported()) { |
2868 | ret = LTTNG_ERR_NO_UST; | |
2869 | goto error; | |
2870 | } | |
5c827ce0 DG |
2871 | /* Consumer is in an ERROR state. Report back to client */ |
2872 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2873 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2874 | goto error; |
2875 | } | |
2876 | ||
44d3bd01 | 2877 | if (need_tracing_session) { |
a4b92340 | 2878 | /* Create UST session if none exist. */ |
f6a9efaa | 2879 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2880 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2881 | &cmd_ctx->lsm->domain); |
f73fabfd | 2882 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2883 | goto error; |
2884 | } | |
2885 | } | |
00e2e675 | 2886 | |
7753dea8 MD |
2887 | /* Start the UST consumer daemons */ |
2888 | /* 64-bit */ | |
2889 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2890 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2891 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2892 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2893 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2894 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2895 | if (ret < 0) { |
f73fabfd | 2896 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2897 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2898 | goto error; |
2899 | } | |
48842b30 | 2900 | |
173af62f | 2901 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2902 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2903 | } else { |
7753dea8 MD |
2904 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2905 | } | |
173af62f DG |
2906 | |
2907 | /* | |
2908 | * Setup socket for consumer 64 bit. No need for atomic access | |
2909 | * since it was set above and can ONLY be set in this thread. | |
2910 | */ | |
a4b92340 DG |
2911 | ret = consumer_create_socket(&ustconsumer64_data, |
2912 | cmd_ctx->session->ust_session->consumer); | |
2913 | if (ret < 0) { | |
2914 | goto error; | |
173af62f DG |
2915 | } |
2916 | ||
7753dea8 | 2917 | /* 32-bit */ |
fc7a59ce | 2918 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2919 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2920 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2921 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2922 | ret = start_consumerd(&ustconsumer32_data); | |
2923 | if (ret < 0) { | |
f73fabfd | 2924 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2925 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2926 | goto error; |
2927 | } | |
5c827ce0 | 2928 | |
173af62f | 2929 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2930 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2931 | } else { |
2932 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2933 | } |
173af62f DG |
2934 | |
2935 | /* | |
2936 | * Setup socket for consumer 64 bit. No need for atomic access | |
2937 | * since it was set above and can ONLY be set in this thread. | |
2938 | */ | |
a4b92340 DG |
2939 | ret = consumer_create_socket(&ustconsumer32_data, |
2940 | cmd_ctx->session->ust_session->consumer); | |
2941 | if (ret < 0) { | |
2942 | goto error; | |
173af62f | 2943 | } |
44d3bd01 DG |
2944 | } |
2945 | break; | |
48842b30 | 2946 | } |
54d01ffb | 2947 | default: |
54d01ffb DG |
2948 | break; |
2949 | } | |
2e09ba09 | 2950 | skip_domain: |
33a2b854 | 2951 | |
5c827ce0 DG |
2952 | /* Validate consumer daemon state when start/stop trace command */ |
2953 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2954 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2955 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 2956 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
2957 | case LTTNG_DOMAIN_UST: |
2958 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2959 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2960 | goto error; |
2961 | } | |
2962 | break; | |
2963 | case LTTNG_DOMAIN_KERNEL: | |
2964 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2965 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2966 | goto error; |
2967 | } | |
2968 | break; | |
2969 | } | |
2970 | } | |
2971 | ||
8e0af1b4 MD |
2972 | /* |
2973 | * Check that the UID or GID match that of the tracing session. | |
2974 | * The root user can interact with all sessions. | |
2975 | */ | |
2976 | if (need_tracing_session) { | |
2977 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2978 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2979 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2980 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2981 | goto error; |
2982 | } | |
2983 | } | |
2984 | ||
ffe60014 DG |
2985 | /* |
2986 | * Send relayd information to consumer as soon as we have a domain and a | |
2987 | * session defined. | |
2988 | */ | |
2989 | if (cmd_ctx->session && need_domain) { | |
2990 | /* | |
2991 | * Setup relayd if not done yet. If the relayd information was already | |
2992 | * sent to the consumer, this call will gracefully return. | |
2993 | */ | |
2994 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2995 | if (ret != LTTNG_OK) { | |
2996 | goto error; | |
2997 | } | |
2998 | } | |
2999 | ||
54d01ffb DG |
3000 | /* Process by command type */ |
3001 | switch (cmd_ctx->lsm->cmd_type) { | |
3002 | case LTTNG_ADD_CONTEXT: | |
3003 | { | |
3004 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3005 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3006 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3007 | break; |
3008 | } | |
3009 | case LTTNG_DISABLE_CHANNEL: | |
3010 | { | |
3011 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3012 | cmd_ctx->lsm->u.disable.channel_name); | |
3013 | break; | |
3014 | } | |
3015 | case LTTNG_DISABLE_EVENT: | |
3016 | { | |
3017 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3018 | cmd_ctx->lsm->u.disable.channel_name, | |
3019 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3020 | break; |
3021 | } | |
54d01ffb DG |
3022 | case LTTNG_DISABLE_ALL_EVENT: |
3023 | { | |
2bdd86d4 | 3024 | DBG("Disabling all events"); |
54d01ffb DG |
3025 | |
3026 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3027 | cmd_ctx->lsm->u.disable.channel_name); | |
3028 | break; | |
3029 | } | |
3030 | case LTTNG_ENABLE_CHANNEL: | |
3031 | { | |
7972aab2 | 3032 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3033 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3034 | break; |
3035 | } | |
3036 | case LTTNG_ENABLE_EVENT: | |
3037 | { | |
882ef835 JI |
3038 | struct lttng_event_exclusion *exclusion = NULL; |
3039 | struct lttng_filter_bytecode *bytecode = NULL; | |
3040 | ||
67676bd8 DG |
3041 | /* Handle exclusion events and receive it from the client. */ |
3042 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3043 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3044 | ||
3045 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3046 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3047 | if (!exclusion) { | |
3048 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3049 | goto error; | |
882ef835 | 3050 | } |
882ef835 | 3051 | |
67676bd8 DG |
3052 | DBG("Receiving var len exclusion event list from client ..."); |
3053 | exclusion->count = count; | |
3054 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3055 | count * LTTNG_SYMBOL_NAME_LEN); | |
3056 | if (ret <= 0) { | |
3057 | DBG("Nothing recv() from client var len data... continuing"); | |
3058 | *sock_error = 1; | |
3059 | free(exclusion); | |
3060 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3061 | goto error; | |
3062 | } | |
3063 | } | |
3064 | ||
3065 | /* Handle filter and get bytecode from client. */ | |
3066 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3067 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3068 | ||
3069 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3070 | ret = LTTNG_ERR_FILTER_INVAL; | |
3071 | free(exclusion); | |
3072 | goto error; | |
3073 | } | |
3074 | ||
3075 | bytecode = zmalloc(bytecode_len); | |
3076 | if (!bytecode) { | |
3077 | free(exclusion); | |
3078 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3079 | goto error; | |
882ef835 JI |
3080 | } |
3081 | ||
67676bd8 DG |
3082 | /* Receive var. len. data */ |
3083 | DBG("Receiving var len filter's bytecode from client ..."); | |
3084 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3085 | if (ret <= 0) { | |
3086 | DBG("Nothing recv() from client car len data... continuing"); | |
3087 | *sock_error = 1; | |
3088 | free(bytecode); | |
3089 | free(exclusion); | |
3090 | ret = LTTNG_ERR_FILTER_INVAL; | |
3091 | goto error; | |
3092 | } | |
3093 | ||
3094 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
3095 | free(bytecode); | |
3096 | free(exclusion); | |
3097 | ret = LTTNG_ERR_FILTER_INVAL; | |
3098 | goto error; | |
3099 | } | |
882ef835 | 3100 | } |
67676bd8 DG |
3101 | |
3102 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3103 | cmd_ctx->lsm->u.enable.channel_name, | |
3104 | &cmd_ctx->lsm->u.enable.event, bytecode, exclusion, | |
3105 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3106 | break; |
3107 | } | |
3108 | case LTTNG_ENABLE_ALL_EVENT: | |
3109 | { | |
2bdd86d4 | 3110 | DBG("Enabling all events"); |
54d01ffb | 3111 | |
7972aab2 | 3112 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3113 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 3114 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
3115 | break; |
3116 | } | |
052da939 | 3117 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3118 | { |
9f19cc17 | 3119 | struct lttng_event *events; |
54d01ffb | 3120 | ssize_t nb_events; |
052da939 | 3121 | |
54d01ffb DG |
3122 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3123 | if (nb_events < 0) { | |
f73fabfd | 3124 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3125 | ret = -nb_events; |
3126 | goto error; | |
2ef84c95 DG |
3127 | } |
3128 | ||
3129 | /* | |
3130 | * Setup lttng message with payload size set to the event list size in | |
3131 | * bytes and then copy list into the llm payload. | |
3132 | */ | |
052da939 | 3133 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3134 | if (ret < 0) { |
052da939 | 3135 | free(events); |
2ef84c95 DG |
3136 | goto setup_error; |
3137 | } | |
3138 | ||
3139 | /* Copy event list into message payload */ | |
9f19cc17 | 3140 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3141 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3142 | |
9f19cc17 | 3143 | free(events); |
2ef84c95 | 3144 | |
f73fabfd | 3145 | ret = LTTNG_OK; |
2ef84c95 DG |
3146 | break; |
3147 | } | |
f37d259d MD |
3148 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3149 | { | |
3150 | struct lttng_event_field *fields; | |
3151 | ssize_t nb_fields; | |
3152 | ||
a4b92340 DG |
3153 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3154 | &fields); | |
f37d259d | 3155 | if (nb_fields < 0) { |
f73fabfd | 3156 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3157 | ret = -nb_fields; |
3158 | goto error; | |
3159 | } | |
3160 | ||
3161 | /* | |
3162 | * Setup lttng message with payload size set to the event list size in | |
3163 | * bytes and then copy list into the llm payload. | |
3164 | */ | |
a4b92340 DG |
3165 | ret = setup_lttng_msg(cmd_ctx, |
3166 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3167 | if (ret < 0) { |
3168 | free(fields); | |
3169 | goto setup_error; | |
3170 | } | |
3171 | ||
3172 | /* Copy event list into message payload */ | |
3173 | memcpy(cmd_ctx->llm->payload, fields, | |
3174 | sizeof(struct lttng_event_field) * nb_fields); | |
3175 | ||
3176 | free(fields); | |
3177 | ||
f73fabfd | 3178 | ret = LTTNG_OK; |
f37d259d MD |
3179 | break; |
3180 | } | |
00e2e675 DG |
3181 | case LTTNG_SET_CONSUMER_URI: |
3182 | { | |
a4b92340 DG |
3183 | size_t nb_uri, len; |
3184 | struct lttng_uri *uris; | |
3185 | ||
3186 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3187 | len = nb_uri * sizeof(struct lttng_uri); | |
3188 | ||
3189 | if (nb_uri == 0) { | |
f73fabfd | 3190 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3191 | goto error; |
3192 | } | |
3193 | ||
3194 | uris = zmalloc(len); | |
3195 | if (uris == NULL) { | |
f73fabfd | 3196 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3197 | goto error; |
3198 | } | |
3199 | ||
3200 | /* Receive variable len data */ | |
77c7c900 | 3201 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3202 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3203 | if (ret <= 0) { | |
3204 | DBG("No URIs received from client... continuing"); | |
3205 | *sock_error = 1; | |
f73fabfd | 3206 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3207 | free(uris); |
a4b92340 DG |
3208 | goto error; |
3209 | } | |
3210 | ||
00e2e675 | 3211 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3212 | nb_uri, uris); |
f73fabfd | 3213 | if (ret != LTTNG_OK) { |
b1d41407 | 3214 | free(uris); |
a4b92340 DG |
3215 | goto error; |
3216 | } | |
3217 | ||
3218 | /* | |
3219 | * XXX: 0 means that this URI should be applied on the session. Should | |
3220 | * be a DOMAIN enuam. | |
3221 | */ | |
3222 | if (cmd_ctx->lsm->domain.type == 0) { | |
3223 | /* Add the URI for the UST session if a consumer is present. */ | |
3224 | if (cmd_ctx->session->ust_session && | |
3225 | cmd_ctx->session->ust_session->consumer) { | |
3226 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3227 | nb_uri, uris); | |
3228 | } else if (cmd_ctx->session->kernel_session && | |
3229 | cmd_ctx->session->kernel_session->consumer) { | |
3230 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3231 | cmd_ctx->session, nb_uri, uris); | |
3232 | } | |
3233 | } | |
3234 | ||
b1d41407 DG |
3235 | free(uris); |
3236 | ||
00e2e675 DG |
3237 | break; |
3238 | } | |
f3ed775e | 3239 | case LTTNG_START_TRACE: |
8c0faa1d | 3240 | { |
54d01ffb | 3241 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3242 | break; |
3243 | } | |
f3ed775e | 3244 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3245 | { |
54d01ffb | 3246 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3247 | break; |
3248 | } | |
5e16da05 MD |
3249 | case LTTNG_CREATE_SESSION: |
3250 | { | |
a4b92340 DG |
3251 | size_t nb_uri, len; |
3252 | struct lttng_uri *uris = NULL; | |
3253 | ||
3254 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3255 | len = nb_uri * sizeof(struct lttng_uri); | |
3256 | ||
3257 | if (nb_uri > 0) { | |
3258 | uris = zmalloc(len); | |
3259 | if (uris == NULL) { | |
f73fabfd | 3260 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3261 | goto error; |
3262 | } | |
3263 | ||
3264 | /* Receive variable len data */ | |
77c7c900 | 3265 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3266 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3267 | if (ret <= 0) { | |
3268 | DBG("No URIs received from client... continuing"); | |
3269 | *sock_error = 1; | |
f73fabfd | 3270 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3271 | free(uris); |
a4b92340 DG |
3272 | goto error; |
3273 | } | |
3274 | ||
3275 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3276 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3277 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3278 | free(uris); |
a4b92340 DG |
3279 | goto error; |
3280 | } | |
3281 | } | |
3282 | ||
3283 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3284 | &cmd_ctx->creds, 0); |
a4b92340 | 3285 | |
b1d41407 DG |
3286 | free(uris); |
3287 | ||
00e2e675 DG |
3288 | break; |
3289 | } | |
5e16da05 MD |
3290 | case LTTNG_DESTROY_SESSION: |
3291 | { | |
2f77fc4b | 3292 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3293 | |
3294 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3295 | cmd_ctx->session = NULL; |
5461b305 | 3296 | break; |
5e16da05 | 3297 | } |
9f19cc17 | 3298 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3299 | { |
54d01ffb DG |
3300 | ssize_t nb_dom; |
3301 | struct lttng_domain *domains; | |
5461b305 | 3302 | |
54d01ffb DG |
3303 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3304 | if (nb_dom < 0) { | |
f73fabfd | 3305 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3306 | ret = -nb_dom; |
3307 | goto error; | |
ce3d728c | 3308 | } |
520ff687 | 3309 | |
54d01ffb | 3310 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3311 | if (ret < 0) { |
ae9c20bc | 3312 | free(domains); |
5461b305 | 3313 | goto setup_error; |
520ff687 | 3314 | } |
57167058 | 3315 | |
54d01ffb DG |
3316 | /* Copy event list into message payload */ |
3317 | memcpy(cmd_ctx->llm->payload, domains, | |
3318 | nb_dom * sizeof(struct lttng_domain)); | |
3319 | ||
3320 | free(domains); | |
5e16da05 | 3321 | |
f73fabfd | 3322 | ret = LTTNG_OK; |
5e16da05 MD |
3323 | break; |
3324 | } | |
9f19cc17 | 3325 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3326 | { |
6775595e | 3327 | int nb_chan; |
54d01ffb DG |
3328 | struct lttng_channel *channels; |
3329 | ||
b551a063 DG |
3330 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3331 | cmd_ctx->session, &channels); | |
54d01ffb | 3332 | if (nb_chan < 0) { |
f73fabfd | 3333 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3334 | ret = -nb_chan; |
3335 | goto error; | |
5461b305 | 3336 | } |
ca95a216 | 3337 | |
54d01ffb | 3338 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3339 | if (ret < 0) { |
ae9c20bc | 3340 | free(channels); |
5461b305 DG |
3341 | goto setup_error; |
3342 | } | |
9f19cc17 | 3343 | |
54d01ffb DG |
3344 | /* Copy event list into message payload */ |
3345 | memcpy(cmd_ctx->llm->payload, channels, | |
3346 | nb_chan * sizeof(struct lttng_channel)); | |
3347 | ||
3348 | free(channels); | |
9f19cc17 | 3349 | |
f73fabfd | 3350 | ret = LTTNG_OK; |
5461b305 | 3351 | break; |
5e16da05 | 3352 | } |
9f19cc17 | 3353 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3354 | { |
b551a063 | 3355 | ssize_t nb_event; |
684d34d2 | 3356 | struct lttng_event *events = NULL; |
9f19cc17 | 3357 | |
b551a063 | 3358 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3359 | cmd_ctx->lsm->u.list.channel_name, &events); |
3360 | if (nb_event < 0) { | |
f73fabfd | 3361 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3362 | ret = -nb_event; |
3363 | goto error; | |
5461b305 | 3364 | } |
ca95a216 | 3365 | |
54d01ffb | 3366 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3367 | if (ret < 0) { |
ae9c20bc | 3368 | free(events); |
5461b305 DG |
3369 | goto setup_error; |
3370 | } | |
9f19cc17 | 3371 | |
54d01ffb DG |
3372 | /* Copy event list into message payload */ |
3373 | memcpy(cmd_ctx->llm->payload, events, | |
3374 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3375 | |
54d01ffb | 3376 | free(events); |
9f19cc17 | 3377 | |
f73fabfd | 3378 | ret = LTTNG_OK; |
5461b305 | 3379 | break; |
5e16da05 MD |
3380 | } |
3381 | case LTTNG_LIST_SESSIONS: | |
3382 | { | |
8e0af1b4 | 3383 | unsigned int nr_sessions; |
5461b305 | 3384 | |
8e0af1b4 | 3385 | session_lock_list(); |
730389d9 DG |
3386 | nr_sessions = lttng_sessions_count( |
3387 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3388 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3389 | |
8e0af1b4 | 3390 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3391 | if (ret < 0) { |
54d01ffb | 3392 | session_unlock_list(); |
5461b305 | 3393 | goto setup_error; |
e065084a | 3394 | } |
5e16da05 | 3395 | |
6c9cc2ab | 3396 | /* Filled the session array */ |
2f77fc4b | 3397 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3398 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3399 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3400 | |
54d01ffb | 3401 | session_unlock_list(); |
5e16da05 | 3402 | |
f73fabfd | 3403 | ret = LTTNG_OK; |
5e16da05 MD |
3404 | break; |
3405 | } | |
d0254c7c MD |
3406 | case LTTNG_CALIBRATE: |
3407 | { | |
54d01ffb DG |
3408 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3409 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3410 | break; |
3411 | } | |
d9800920 DG |
3412 | case LTTNG_REGISTER_CONSUMER: |
3413 | { | |
2f77fc4b DG |
3414 | struct consumer_data *cdata; |
3415 | ||
3416 | switch (cmd_ctx->lsm->domain.type) { | |
3417 | case LTTNG_DOMAIN_KERNEL: | |
3418 | cdata = &kconsumer_data; | |
3419 | break; | |
3420 | default: | |
f73fabfd | 3421 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3422 | goto error; |
3423 | } | |
3424 | ||
54d01ffb | 3425 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3426 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3427 | break; |
3428 | } | |
6d805429 | 3429 | case LTTNG_DATA_PENDING: |
806e2684 | 3430 | { |
6d805429 | 3431 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3432 | break; |
3433 | } | |
da3c9ec1 DG |
3434 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3435 | { | |
6dc3064a DG |
3436 | struct lttcomm_lttng_output_id reply; |
3437 | ||
3438 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3439 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3440 | if (ret != LTTNG_OK) { | |
3441 | goto error; | |
3442 | } | |
3443 | ||
3444 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3445 | if (ret < 0) { | |
3446 | goto setup_error; | |
3447 | } | |
3448 | ||
3449 | /* Copy output list into message payload */ | |
3450 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3451 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3452 | break; |
3453 | } | |
3454 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3455 | { | |
6dc3064a DG |
3456 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3457 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3458 | break; |
3459 | } | |
3460 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3461 | { | |
6dc3064a DG |
3462 | ssize_t nb_output; |
3463 | struct lttng_snapshot_output *outputs = NULL; | |
3464 | ||
3465 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3466 | if (nb_output < 0) { | |
3467 | ret = -nb_output; | |
3468 | goto error; | |
3469 | } | |
3470 | ||
3471 | ret = setup_lttng_msg(cmd_ctx, | |
3472 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3473 | if (ret < 0) { | |
3474 | free(outputs); | |
3475 | goto setup_error; | |
3476 | } | |
3477 | ||
3478 | if (outputs) { | |
3479 | /* Copy output list into message payload */ | |
3480 | memcpy(cmd_ctx->llm->payload, outputs, | |
3481 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3482 | free(outputs); | |
3483 | } | |
3484 | ||
3485 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3486 | break; |
3487 | } | |
3488 | case LTTNG_SNAPSHOT_RECORD: | |
3489 | { | |
6dc3064a DG |
3490 | ret = cmd_snapshot_record(cmd_ctx->session, |
3491 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3492 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3493 | break; |
3494 | } | |
27babd3a DG |
3495 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3496 | { | |
3497 | size_t nb_uri, len; | |
3498 | struct lttng_uri *uris = NULL; | |
3499 | ||
3500 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3501 | len = nb_uri * sizeof(struct lttng_uri); | |
3502 | ||
3503 | if (nb_uri > 0) { | |
3504 | uris = zmalloc(len); | |
3505 | if (uris == NULL) { | |
3506 | ret = LTTNG_ERR_FATAL; | |
3507 | goto error; | |
3508 | } | |
3509 | ||
3510 | /* Receive variable len data */ | |
3511 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3512 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3513 | if (ret <= 0) { | |
3514 | DBG("No URIs received from client... continuing"); | |
3515 | *sock_error = 1; | |
3516 | ret = LTTNG_ERR_SESSION_FAIL; | |
3517 | free(uris); | |
3518 | goto error; | |
3519 | } | |
3520 | ||
3521 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3522 | DBG("Creating session with ONE network URI is a bad call"); | |
3523 | ret = LTTNG_ERR_SESSION_FAIL; | |
3524 | free(uris); | |
3525 | goto error; | |
3526 | } | |
3527 | } | |
3528 | ||
3529 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3530 | nb_uri, &cmd_ctx->creds); | |
3531 | free(uris); | |
3532 | break; | |
3533 | } | |
ecc48a90 JD |
3534 | case LTTNG_CREATE_SESSION_LIVE: |
3535 | { | |
3536 | size_t nb_uri, len; | |
3537 | struct lttng_uri *uris = NULL; | |
3538 | ||
3539 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3540 | len = nb_uri * sizeof(struct lttng_uri); | |
3541 | ||
3542 | if (nb_uri > 0) { | |
3543 | uris = zmalloc(len); | |
3544 | if (uris == NULL) { | |
3545 | ret = LTTNG_ERR_FATAL; | |
3546 | goto error; | |
3547 | } | |
3548 | ||
3549 | /* Receive variable len data */ | |
3550 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3551 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3552 | if (ret <= 0) { | |
3553 | DBG("No URIs received from client... continuing"); | |
3554 | *sock_error = 1; | |
3555 | ret = LTTNG_ERR_SESSION_FAIL; | |
3556 | free(uris); | |
3557 | goto error; | |
3558 | } | |
3559 | ||
3560 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3561 | DBG("Creating session with ONE network URI is a bad call"); | |
3562 | ret = LTTNG_ERR_SESSION_FAIL; | |
3563 | free(uris); | |
3564 | goto error; | |
3565 | } | |
3566 | } | |
3567 | ||
3568 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3569 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3570 | free(uris); | |
3571 | break; | |
3572 | } | |
5e16da05 | 3573 | default: |
f73fabfd | 3574 | ret = LTTNG_ERR_UND; |
5461b305 | 3575 | break; |
fac6795d DG |
3576 | } |
3577 | ||
5461b305 | 3578 | error: |
5461b305 DG |
3579 | if (cmd_ctx->llm == NULL) { |
3580 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3581 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3582 | goto setup_error; |
3583 | } | |
3584 | } | |
54d01ffb | 3585 | /* Set return code */ |
5461b305 | 3586 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3587 | setup_error: |
b5541356 | 3588 | if (cmd_ctx->session) { |
54d01ffb | 3589 | session_unlock(cmd_ctx->session); |
b5541356 | 3590 | } |
256a5576 MD |
3591 | if (need_tracing_session) { |
3592 | session_unlock_list(); | |
3593 | } | |
54d01ffb | 3594 | init_setup_error: |
8028d920 | 3595 | return ret; |
fac6795d DG |
3596 | } |
3597 | ||
44a5e5eb DG |
3598 | /* |
3599 | * Thread managing health check socket. | |
3600 | */ | |
3601 | static void *thread_manage_health(void *data) | |
3602 | { | |
eb4a2943 | 3603 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3604 | uint32_t revents, nb_fd; |
3605 | struct lttng_poll_event events; | |
0c89d795 MD |
3606 | struct health_comm_msg msg; |
3607 | struct health_comm_reply reply; | |
44a5e5eb DG |
3608 | |
3609 | DBG("[thread] Manage health check started"); | |
3610 | ||
3611 | rcu_register_thread(); | |
3612 | ||
6d737ce4 DG |
3613 | /* We might hit an error path before this is created. */ |
3614 | lttng_poll_init(&events); | |
3cc04881 | 3615 | |
44a5e5eb DG |
3616 | /* Create unix socket */ |
3617 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3618 | if (sock < 0) { | |
3619 | ERR("Unable to create health check Unix socket"); | |
3620 | ret = -1; | |
3621 | goto error; | |
3622 | } | |
3623 | ||
6c71277b MD |
3624 | if (is_root) { |
3625 | /* lttng health client socket path permissions */ | |
3626 | ret = chown(health_unix_sock_path, 0, | |
3627 | utils_get_group_id(tracing_group_name)); | |
3628 | if (ret < 0) { | |
3629 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3630 | PERROR("chown"); | |
3631 | ret = -1; | |
3632 | goto error; | |
3633 | } | |
3634 | ||
3635 | ret = chmod(health_unix_sock_path, | |
3636 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3637 | if (ret < 0) { | |
3638 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3639 | PERROR("chmod"); | |
3640 | ret = -1; | |
3641 | goto error; | |
3642 | } | |
3643 | } | |
3644 | ||
b662582b DG |
3645 | /* |
3646 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3647 | * show must go on. | |
3648 | */ | |
3649 | (void) utils_set_fd_cloexec(sock); | |
3650 | ||
44a5e5eb DG |
3651 | ret = lttcomm_listen_unix_sock(sock); |
3652 | if (ret < 0) { | |
3653 | goto error; | |
3654 | } | |
3655 | ||
3656 | /* | |
3657 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3658 | * more will be added to this poll set. | |
3659 | */ | |
d0b96690 | 3660 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3661 | if (ret < 0) { |
3662 | goto error; | |
3663 | } | |
3664 | ||
3665 | /* Add the application registration socket */ | |
3666 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3667 | if (ret < 0) { | |
3668 | goto error; | |
3669 | } | |
3670 | ||
97bc1426 MD |
3671 | lttng_sessiond_notify_ready(); |
3672 | ||
44a5e5eb DG |
3673 | while (1) { |
3674 | DBG("Health check ready"); | |
3675 | ||
44a5e5eb DG |
3676 | /* Inifinite blocking call, waiting for transmission */ |
3677 | restart: | |
3678 | ret = lttng_poll_wait(&events, -1); | |
3679 | if (ret < 0) { | |
3680 | /* | |
3681 | * Restart interrupted system call. | |
3682 | */ | |
3683 | if (errno == EINTR) { | |
3684 | goto restart; | |
3685 | } | |
3686 | goto error; | |
3687 | } | |
3688 | ||
0d9c5d77 DG |
3689 | nb_fd = ret; |
3690 | ||
44a5e5eb DG |
3691 | for (i = 0; i < nb_fd; i++) { |
3692 | /* Fetch once the poll data */ | |
3693 | revents = LTTNG_POLL_GETEV(&events, i); | |
3694 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3695 | ||
3696 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3697 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3698 | if (ret) { |
139ac872 MD |
3699 | err = 0; |
3700 | goto exit; | |
44a5e5eb DG |
3701 | } |
3702 | ||
3703 | /* Event on the registration socket */ | |
3704 | if (pollfd == sock) { | |
3705 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3706 | ERR("Health socket poll error"); | |
3707 | goto error; | |
3708 | } | |
3709 | } | |
3710 | } | |
3711 | ||
3712 | new_sock = lttcomm_accept_unix_sock(sock); | |
3713 | if (new_sock < 0) { | |
3714 | goto error; | |
3715 | } | |
3716 | ||
b662582b DG |
3717 | /* |
3718 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3719 | * show must go on. | |
3720 | */ | |
3721 | (void) utils_set_fd_cloexec(new_sock); | |
3722 | ||
44a5e5eb DG |
3723 | DBG("Receiving data from client for health..."); |
3724 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3725 | if (ret <= 0) { | |
3726 | DBG("Nothing recv() from client... continuing"); | |
3727 | ret = close(new_sock); | |
3728 | if (ret) { | |
3729 | PERROR("close"); | |
3730 | } | |
3731 | new_sock = -1; | |
3732 | continue; | |
3733 | } | |
3734 | ||
3735 | rcu_thread_online(); | |
3736 | ||
6c71277b MD |
3737 | reply.ret_code = 0; |
3738 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { | |
3739 | /* | |
3740 | * health_check_state returns 0 if health is | |
3741 | * bad. | |
3742 | */ | |
3743 | if (!health_check_state(health_sessiond, i)) { | |
3744 | reply.ret_code |= 1ULL << i; | |
3745 | } | |
44a5e5eb DG |
3746 | } |
3747 | ||
6c71277b | 3748 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3749 | |
3750 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3751 | if (ret < 0) { | |
3752 | ERR("Failed to send health data back to client"); | |
3753 | } | |
3754 | ||
3755 | /* End of transmission */ | |
3756 | ret = close(new_sock); | |
3757 | if (ret) { | |
3758 | PERROR("close"); | |
3759 | } | |
3760 | new_sock = -1; | |
3761 | } | |
3762 | ||
139ac872 | 3763 | exit: |
44a5e5eb | 3764 | error: |
139ac872 MD |
3765 | if (err) { |
3766 | ERR("Health error occurred in %s", __func__); | |
3767 | } | |
44a5e5eb DG |
3768 | DBG("Health check thread dying"); |
3769 | unlink(health_unix_sock_path); | |
3770 | if (sock >= 0) { | |
3771 | ret = close(sock); | |
3772 | if (ret) { | |
3773 | PERROR("close"); | |
3774 | } | |
3775 | } | |
44a5e5eb DG |
3776 | |
3777 | lttng_poll_clean(&events); | |
3778 | ||
3779 | rcu_unregister_thread(); | |
3780 | return NULL; | |
3781 | } | |
3782 | ||
1d4b027a | 3783 | /* |
d063d709 DG |
3784 | * This thread manage all clients request using the unix client socket for |
3785 | * communication. | |
1d4b027a DG |
3786 | */ |
3787 | static void *thread_manage_clients(void *data) | |
3788 | { | |
139ac872 | 3789 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3790 | int sock_error; |
5eb91c98 | 3791 | uint32_t revents, nb_fd; |
273ea72c | 3792 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3793 | struct lttng_poll_event events; |
1d4b027a DG |
3794 | |
3795 | DBG("[thread] Manage client started"); | |
3796 | ||
f6a9efaa DG |
3797 | rcu_register_thread(); |
3798 | ||
6c71277b | 3799 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3800 | |
840cb59c | 3801 | health_code_update(); |
44a5e5eb | 3802 | |
1d4b027a DG |
3803 | ret = lttcomm_listen_unix_sock(client_sock); |
3804 | if (ret < 0) { | |
35df2755 | 3805 | goto error_listen; |
1d4b027a DG |
3806 | } |
3807 | ||
5eb91c98 DG |
3808 | /* |
3809 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3810 | * more will be added to this poll set. | |
3811 | */ | |
d0b96690 | 3812 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3813 | if (ret < 0) { |
35df2755 | 3814 | goto error_create_poll; |
5eb91c98 | 3815 | } |
273ea72c | 3816 | |
5eb91c98 DG |
3817 | /* Add the application registration socket */ |
3818 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3819 | if (ret < 0) { | |
3820 | goto error; | |
3821 | } | |
273ea72c | 3822 | |
97bc1426 | 3823 | lttng_sessiond_notify_ready(); |
0bb7724a | 3824 | |
72453c8c MD |
3825 | /* This testpoint is after we signal readiness to the parent. */ |
3826 | if (testpoint(sessiond_thread_manage_clients)) { | |
3827 | goto error; | |
3828 | } | |
3829 | ||
e547b070 | 3830 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
3831 | goto error; |
3832 | } | |
8ac94142 | 3833 | |
840cb59c | 3834 | health_code_update(); |
44a5e5eb | 3835 | |
1d4b027a | 3836 | while (1) { |
1d4b027a | 3837 | DBG("Accepting client command ..."); |
273ea72c DG |
3838 | |
3839 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3840 | restart: |
a78af745 | 3841 | health_poll_entry(); |
5eb91c98 | 3842 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3843 | health_poll_exit(); |
273ea72c | 3844 | if (ret < 0) { |
88f2b785 MD |
3845 | /* |
3846 | * Restart interrupted system call. | |
3847 | */ | |
3848 | if (errno == EINTR) { | |
3849 | goto restart; | |
3850 | } | |
273ea72c DG |
3851 | goto error; |
3852 | } | |
3853 | ||
0d9c5d77 DG |
3854 | nb_fd = ret; |
3855 | ||
5eb91c98 DG |
3856 | for (i = 0; i < nb_fd; i++) { |
3857 | /* Fetch once the poll data */ | |
3858 | revents = LTTNG_POLL_GETEV(&events, i); | |
3859 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3860 | ||
840cb59c | 3861 | health_code_update(); |
44a5e5eb | 3862 | |
5eb91c98 | 3863 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3864 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3865 | if (ret) { |
139ac872 MD |
3866 | err = 0; |
3867 | goto exit; | |
5eb91c98 DG |
3868 | } |
3869 | ||
3870 | /* Event on the registration socket */ | |
3871 | if (pollfd == client_sock) { | |
3872 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3873 | ERR("Client socket poll error"); | |
3874 | goto error; | |
3875 | } | |
3876 | } | |
3877 | } | |
3878 | ||
3879 | DBG("Wait for client response"); | |
3880 | ||
840cb59c | 3881 | health_code_update(); |
44a5e5eb | 3882 | |
5eb91c98 DG |
3883 | sock = lttcomm_accept_unix_sock(client_sock); |
3884 | if (sock < 0) { | |
273ea72c | 3885 | goto error; |
273ea72c DG |
3886 | } |
3887 | ||
b662582b DG |
3888 | /* |
3889 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3890 | * show must go on. | |
3891 | */ | |
3892 | (void) utils_set_fd_cloexec(sock); | |
3893 | ||
be040666 DG |
3894 | /* Set socket option for credentials retrieval */ |
3895 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3896 | if (ret < 0) { | |
3897 | goto error; | |
3898 | } | |
3899 | ||
5eb91c98 | 3900 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3901 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3902 | if (cmd_ctx == NULL) { |
76d7553f | 3903 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3904 | goto error; |
5eb91c98 | 3905 | } |
1d4b027a | 3906 | |
5eb91c98 | 3907 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3908 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3909 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3910 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3911 | goto error; |
3912 | } | |
1d4b027a | 3913 | |
5eb91c98 DG |
3914 | cmd_ctx->llm = NULL; |
3915 | cmd_ctx->session = NULL; | |
1d4b027a | 3916 | |
840cb59c | 3917 | health_code_update(); |
44a5e5eb | 3918 | |
5eb91c98 DG |
3919 | /* |
3920 | * Data is received from the lttng client. The struct | |
3921 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3922 | * the client. | |
3923 | */ | |
3924 | DBG("Receiving data from client ..."); | |
be040666 DG |
3925 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3926 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3927 | if (ret <= 0) { |
3928 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3929 | ret = close(sock); |
3930 | if (ret) { | |
3931 | PERROR("close"); | |
3932 | } | |
3933 | sock = -1; | |
a2c0da86 | 3934 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3935 | continue; |
3936 | } | |
1d4b027a | 3937 | |
840cb59c | 3938 | health_code_update(); |
44a5e5eb | 3939 | |
5eb91c98 DG |
3940 | // TODO: Validate cmd_ctx including sanity check for |
3941 | // security purpose. | |
f7776ea7 | 3942 | |
f6a9efaa | 3943 | rcu_thread_online(); |
5eb91c98 DG |
3944 | /* |
3945 | * This function dispatch the work to the kernel or userspace tracer | |
3946 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3947 | * informations for the client. The command context struct contains | |
3948 | * everything this function may needs. | |
3949 | */ | |
53a80697 | 3950 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3951 | rcu_thread_offline(); |
5eb91c98 | 3952 | if (ret < 0) { |
36134aa1 DG |
3953 | ret = close(sock); |
3954 | if (ret) { | |
3955 | PERROR("close"); | |
53a80697 | 3956 | } |
36134aa1 | 3957 | sock = -1; |
bbd973c2 | 3958 | /* |
5eb91c98 | 3959 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3960 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3961 | * (ENOMEM). Error detected but still accept |
3962 | * command, unless a socket error has been | |
3963 | * detected. | |
bbd973c2 | 3964 | */ |
bbd973c2 | 3965 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3966 | continue; |
3967 | } | |
d6e4fca4 | 3968 | |
840cb59c | 3969 | health_code_update(); |
44a5e5eb | 3970 | |
54d01ffb DG |
3971 | DBG("Sending response (size: %d, retcode: %s)", |
3972 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3973 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3974 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3975 | if (ret < 0) { |
3976 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3977 | } |
1d4b027a | 3978 | |
5eb91c98 | 3979 | /* End of transmission */ |
76d7553f MD |
3980 | ret = close(sock); |
3981 | if (ret) { | |
3982 | PERROR("close"); | |
3983 | } | |
3984 | sock = -1; | |
be040666 DG |
3985 | |
3986 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3987 | |
840cb59c | 3988 | health_code_update(); |
273ea72c DG |
3989 | } |
3990 | ||
139ac872 | 3991 | exit: |
5eb91c98 | 3992 | error: |
35df2755 CB |
3993 | if (sock >= 0) { |
3994 | ret = close(sock); | |
3995 | if (ret) { | |
3996 | PERROR("close"); | |
3997 | } | |
139ac872 | 3998 | } |
44a5e5eb | 3999 | |
35df2755 CB |
4000 | lttng_poll_clean(&events); |
4001 | clean_command_ctx(&cmd_ctx); | |
4002 | ||
4003 | error_listen: | |
4004 | error_create_poll: | |
273ea72c | 4005 | unlink(client_unix_sock_path); |
76d7553f MD |
4006 | if (client_sock >= 0) { |
4007 | ret = close(client_sock); | |
4008 | if (ret) { | |
4009 | PERROR("close"); | |
4010 | } | |
a4b35e07 | 4011 | } |
35df2755 CB |
4012 | |
4013 | if (err) { | |
840cb59c | 4014 | health_error(); |
35df2755 | 4015 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4016 | } |
273ea72c | 4017 | |
8782cc74 | 4018 | health_unregister(health_sessiond); |
35df2755 CB |
4019 | |
4020 | DBG("Client thread dying"); | |
f6a9efaa DG |
4021 | |
4022 | rcu_unregister_thread(); | |
1d4b027a DG |
4023 | return NULL; |
4024 | } | |
4025 | ||
4026 | ||
fac6795d DG |
4027 | /* |
4028 | * usage function on stderr | |
4029 | */ | |
4030 | static void usage(void) | |
4031 | { | |
b716ce68 | 4032 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4033 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4034 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4035 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4036 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4037 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4038 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4039 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4040 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4041 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4042 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4043 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4044 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4045 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4046 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4047 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4048 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4049 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4050 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4051 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4052 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4053 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4054 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4055 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 4056 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
26296c48 | 4057 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
fac6795d DG |
4058 | } |
4059 | ||
4060 | /* | |
26296c48 JG |
4061 | * Take an option from the getopt output and set it in the right variable to be |
4062 | * used later. | |
4063 | * | |
4064 | * Return 0 on success else a negative value. | |
fac6795d | 4065 | */ |
26296c48 | 4066 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4067 | { |
26296c48 | 4068 | int ret = 0; |
fac6795d | 4069 | |
26296c48 JG |
4070 | switch (opt) { |
4071 | case 0: | |
4072 | fprintf(stderr, "option %s", optname); | |
4073 | if (arg) { | |
4074 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4075 | } |
26296c48 JG |
4076 | break; |
4077 | case 'c': | |
4078 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4079 | break; | |
4080 | case 'a': | |
4081 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4082 | break; | |
4083 | case 'd': | |
4084 | opt_daemon = 1; | |
4085 | break; | |
72dd7491 MD |
4086 | case 'b': |
4087 | opt_background = 1; | |
4088 | break; | |
26296c48 JG |
4089 | case 'g': |
4090 | tracing_group_name = strdup(arg); | |
4091 | break; | |
4092 | case 'h': | |
4093 | usage(); | |
4094 | exit(EXIT_FAILURE); | |
4095 | case 'V': | |
4096 | fprintf(stdout, "%s\n", VERSION); | |
4097 | exit(EXIT_SUCCESS); | |
4098 | case 'S': | |
4099 | opt_sig_parent = 1; | |
4100 | break; | |
4101 | case 'E': | |
4102 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4103 | break; | |
4104 | case 'C': | |
4105 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4106 | break; | |
4107 | case 'F': | |
4108 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4109 | break; | |
4110 | case 'D': | |
4111 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4112 | break; | |
4113 | case 'H': | |
4114 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4115 | break; | |
4116 | case 'G': | |
4117 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4118 | break; | |
4119 | case 'N': | |
4120 | opt_no_kernel = 1; | |
4121 | break; | |
4122 | case 'q': | |
4123 | lttng_opt_quiet = 1; | |
4124 | break; | |
4125 | case 'v': | |
4126 | /* Verbose level can increase using multiple -v */ | |
4127 | if (arg) { | |
4128 | lttng_opt_verbose = config_parse_value(arg); | |
4129 | } else { | |
97e19046 | 4130 | lttng_opt_verbose += 1; |
26296c48 JG |
4131 | } |
4132 | break; | |
4133 | case 'Z': | |
4134 | if (arg) { | |
4135 | opt_verbose_consumer = config_parse_value(arg); | |
4136 | } else { | |
3bd1e081 | 4137 | opt_verbose_consumer += 1; |
26296c48 JG |
4138 | } |
4139 | break; | |
4140 | case 'u': | |
4141 | consumerd32_bin = strdup(arg); | |
4142 | consumerd32_bin_override = 1; | |
4143 | break; | |
4144 | case 'U': | |
4145 | consumerd32_libdir = strdup(arg); | |
4146 | consumerd32_libdir_override = 1; | |
4147 | break; | |
4148 | case 't': | |
4149 | consumerd64_bin = strdup(arg); | |
4150 | consumerd64_bin_override = 1; | |
4151 | break; | |
4152 | case 'T': | |
4153 | consumerd64_libdir = strdup(arg); | |
4154 | consumerd64_libdir_override = 1; | |
4155 | break; | |
4156 | case 'p': | |
4157 | opt_pidfile = strdup(arg); | |
4158 | break; | |
4159 | case 'J': /* JUL TCP port. */ | |
4160 | { | |
4161 | unsigned long v; | |
4d076222 | 4162 | |
26296c48 JG |
4163 | errno = 0; |
4164 | v = strtoul(arg, NULL, 0); | |
4165 | if (errno != 0 || !isdigit(arg[0])) { | |
4166 | ERR("Wrong value in --jul-tcp-port parameter: %s", arg); | |
4167 | return -1; | |
4168 | } | |
4169 | if (v == 0 || v >= 65535) { | |
4170 | ERR("Port overflow in --jul-tcp-port parameter: %s", arg); | |
4171 | return -1; | |
4172 | } | |
4173 | jul_tcp_port = (uint32_t) v; | |
4174 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4175 | break; | |
4176 | } | |
4177 | default: | |
4178 | /* Unknown option or other error. | |
4179 | * Error is printed by getopt, just return */ | |
4180 | ret = -1; | |
4181 | } | |
4182 | ||
4183 | return ret; | |
4184 | } | |
4185 | ||
4186 | /* | |
4187 | * config_entry_handler_cb used to handle options read from a config file. | |
4188 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4189 | * return value conventions. | |
4190 | */ | |
4191 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4192 | { | |
4193 | int ret = 0, i; | |
4194 | ||
4195 | if (!entry || !entry->name || !entry->value) { | |
4196 | ret = -EINVAL; | |
4197 | goto end; | |
4198 | } | |
4199 | ||
4200 | /* Check if the option is to be ignored */ | |
4201 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4202 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4203 | goto end; | |
4204 | } | |
4205 | } | |
4206 | ||
4207 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4208 | i++) { | |
4209 | ||
4210 | /* Ignore if not fully matched. */ | |
4211 | if (strcmp(entry->name, long_options[i].name)) { | |
4212 | continue; | |
4213 | } | |
4214 | ||
4215 | /* | |
4216 | * If the option takes no argument on the command line, we have to | |
4217 | * check if the value is "true". We support non-zero numeric values, | |
4218 | * true, on and yes. | |
4219 | */ | |
4220 | if (!long_options[i].has_arg) { | |
4221 | ret = config_parse_value(entry->value); | |
4222 | if (ret <= 0) { | |
4223 | if (ret) { | |
4224 | WARN("Invalid configuration value \"%s\" for option %s", | |
4225 | entry->value, entry->name); | |
4226 | } | |
4227 | /* False, skip boolean config option. */ | |
4228 | goto end; | |
4d076222 | 4229 | } |
26296c48 JG |
4230 | } |
4231 | ||
4232 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4233 | goto end; | |
4234 | } | |
4235 | ||
4236 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4237 | ||
4238 | end: | |
4239 | return ret; | |
4240 | } | |
4241 | ||
4242 | /* | |
4243 | * daemon configuration loading and argument parsing | |
4244 | */ | |
4245 | static int set_options(int argc, char **argv) | |
4246 | { | |
4247 | int ret = 0, c = 0, option_index = 0; | |
4248 | int orig_optopt = optopt, orig_optind = optind; | |
4249 | char *optstring; | |
4250 | const char *config_path = NULL; | |
4251 | ||
4252 | optstring = utils_generate_optstring(long_options, | |
4253 | sizeof(long_options) / sizeof(struct option)); | |
4254 | if (!optstring) { | |
4255 | ret = -ENOMEM; | |
4256 | goto end; | |
4257 | } | |
4258 | ||
4259 | /* Check for the --config option */ | |
4260 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4261 | &option_index)) != -1) { | |
4262 | if (c == '?') { | |
4263 | ret = -EINVAL; | |
4264 | goto end; | |
4265 | } else if (c != 'f') { | |
4266 | /* if not equal to --config option. */ | |
4267 | continue; | |
4268 | } | |
4269 | ||
4270 | config_path = utils_expand_path(optarg); | |
4271 | if (!config_path) { | |
4272 | ERR("Failed to resolve path: %s", optarg); | |
4273 | } | |
4274 | } | |
4275 | ||
4276 | ret = config_get_section_entries(config_path, config_section_name, | |
4277 | config_entry_handler, NULL); | |
4278 | if (ret) { | |
4279 | if (ret > 0) { | |
4280 | ERR("Invalid configuration option at line %i", ret); | |
4281 | ret = -1; | |
4282 | } | |
4283 | goto end; | |
4284 | } | |
4285 | ||
4286 | /* Reset getopt's global state */ | |
4287 | optopt = orig_optopt; | |
4288 | optind = orig_optind; | |
4289 | while (1) { | |
4290 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4291 | if (c == -1) { | |
4d076222 DG |
4292 | break; |
4293 | } | |
26296c48 JG |
4294 | |
4295 | ret = set_option(c, optarg, long_options[option_index].name); | |
4296 | if (ret < 0) { | |
4297 | break; | |
fac6795d DG |
4298 | } |
4299 | } | |
4300 | ||
26296c48 JG |
4301 | end: |
4302 | free(optstring); | |
4303 | return ret; | |
fac6795d DG |
4304 | } |
4305 | ||
4306 | /* | |
d063d709 | 4307 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4308 | * apps_sock - The communication socket for all UST apps. |
4309 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4310 | */ |
cf3af59e | 4311 | static int init_daemon_socket(void) |
fac6795d DG |
4312 | { |
4313 | int ret = 0; | |
4314 | mode_t old_umask; | |
4315 | ||
4316 | old_umask = umask(0); | |
4317 | ||
4318 | /* Create client tool unix socket */ | |
d6f42150 DG |
4319 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4320 | if (client_sock < 0) { | |
4321 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4322 | ret = -1; |
4323 | goto end; | |
4324 | } | |
4325 | ||
b662582b DG |
4326 | /* Set the cloexec flag */ |
4327 | ret = utils_set_fd_cloexec(client_sock); | |
4328 | if (ret < 0) { | |
4329 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4330 | "Continuing but note that the consumer daemon will have a " | |
4331 | "reference to this socket on exec()", client_sock); | |
4332 | } | |
4333 | ||
fac6795d DG |
4334 | /* File permission MUST be 660 */ |
4335 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4336 | if (ret < 0) { | |
d6f42150 | 4337 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4338 | PERROR("chmod"); |
fac6795d DG |
4339 | goto end; |
4340 | } | |
4341 | ||
4342 | /* Create the application unix socket */ | |
d6f42150 DG |
4343 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4344 | if (apps_sock < 0) { | |
4345 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4346 | ret = -1; |
4347 | goto end; | |
4348 | } | |
4349 | ||
b662582b DG |
4350 | /* Set the cloexec flag */ |
4351 | ret = utils_set_fd_cloexec(apps_sock); | |
4352 | if (ret < 0) { | |
4353 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4354 | "Continuing but note that the consumer daemon will have a " | |
4355 | "reference to this socket on exec()", apps_sock); | |
4356 | } | |
4357 | ||
d6f42150 | 4358 | /* File permission MUST be 666 */ |
54d01ffb DG |
4359 | ret = chmod(apps_unix_sock_path, |
4360 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4361 | if (ret < 0) { |
d6f42150 | 4362 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4363 | PERROR("chmod"); |
fac6795d DG |
4364 | goto end; |
4365 | } | |
4366 | ||
b662582b DG |
4367 | DBG3("Session daemon client socket %d and application socket %d created", |
4368 | client_sock, apps_sock); | |
4369 | ||
fac6795d DG |
4370 | end: |
4371 | umask(old_umask); | |
4372 | return ret; | |
4373 | } | |
4374 | ||
4375 | /* | |
54d01ffb DG |
4376 | * Check if the global socket is available, and if a daemon is answering at the |
4377 | * other side. If yes, error is returned. | |
fac6795d | 4378 | */ |
cf3af59e | 4379 | static int check_existing_daemon(void) |
fac6795d | 4380 | { |
7d8234d9 | 4381 | /* Is there anybody out there ? */ |
099e26bd | 4382 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4383 | return -EEXIST; |
099e26bd | 4384 | } |
b09c7c76 DG |
4385 | |
4386 | return 0; | |
fac6795d DG |
4387 | } |
4388 | ||
fac6795d | 4389 | /* |
d063d709 | 4390 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4391 | * |
d063d709 | 4392 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4393 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4394 | */ |
be040666 | 4395 | static int set_permissions(char *rundir) |
fac6795d DG |
4396 | { |
4397 | int ret; | |
996b65c8 | 4398 | gid_t gid; |
fac6795d | 4399 | |
6c71277b | 4400 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4401 | |
d6f42150 | 4402 | /* Set lttng run dir */ |
be040666 | 4403 | ret = chown(rundir, 0, gid); |
d6f42150 | 4404 | if (ret < 0) { |
be040666 | 4405 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4406 | PERROR("chown"); |
d6f42150 DG |
4407 | } |
4408 | ||
6c71277b MD |
4409 | /* |
4410 | * Ensure all applications and tracing group can search the run | |
4411 | * dir. Allow everyone to read the directory, since it does not | |
4412 | * buy us anything to hide its content. | |
4413 | */ | |
4414 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4415 | if (ret < 0) { |
4416 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4417 | PERROR("chmod"); |
d1613cf5 JN |
4418 | } |
4419 | ||
d6f42150 | 4420 | /* lttng client socket path */ |
996b65c8 | 4421 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4422 | if (ret < 0) { |
d6f42150 | 4423 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4424 | PERROR("chown"); |
d6f42150 DG |
4425 | } |
4426 | ||
3bd1e081 | 4427 | /* kconsumer error socket path */ |
6c71277b | 4428 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4429 | if (ret < 0) { |
3bd1e081 | 4430 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4431 | PERROR("chown"); |
3bd1e081 MD |
4432 | } |
4433 | ||
7753dea8 | 4434 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4435 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4436 | if (ret < 0) { |
4437 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4438 | PERROR("chown"); |
7753dea8 MD |
4439 | } |
4440 | ||
4441 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4442 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4443 | if (ret < 0) { |
7753dea8 | 4444 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4445 | PERROR("chown"); |
fac6795d DG |
4446 | } |
4447 | ||
d6f42150 | 4448 | DBG("All permissions are set"); |
e07ae692 | 4449 | |
fac6795d DG |
4450 | return ret; |
4451 | } | |
4452 | ||
d6f42150 | 4453 | /* |
d063d709 | 4454 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4455 | */ |
67e40797 | 4456 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4457 | { |
4458 | int ret; | |
4459 | ||
67e40797 DG |
4460 | DBG3("Creating LTTng run directory: %s", rundir); |
4461 | ||
d1613cf5 | 4462 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4463 | if (ret < 0) { |
b1f11e69 | 4464 | if (errno != EEXIST) { |
67e40797 | 4465 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4466 | goto error; |
4467 | } else { | |
4468 | ret = 0; | |
4469 | } | |
d6f42150 DG |
4470 | } |
4471 | ||
4472 | error: | |
4473 | return ret; | |
4474 | } | |
4475 | ||
4476 | /* | |
d063d709 DG |
4477 | * Setup sockets and directory needed by the kconsumerd communication with the |
4478 | * session daemon. | |
d6f42150 | 4479 | */ |
67e40797 DG |
4480 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4481 | const char *rundir) | |
d6f42150 DG |
4482 | { |
4483 | int ret; | |
67e40797 | 4484 | char path[PATH_MAX]; |
d6f42150 | 4485 | |
6c71277b | 4486 | switch (consumer_data->type) { |
7753dea8 | 4487 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4488 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4489 | break; |
4490 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4491 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4492 | break; |
4493 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4494 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4495 | break; |
4496 | default: | |
4497 | ERR("Consumer type unknown"); | |
4498 | ret = -EINVAL; | |
4499 | goto error; | |
d6f42150 DG |
4500 | } |
4501 | ||
67e40797 DG |
4502 | DBG2("Creating consumer directory: %s", path); |
4503 | ||
6c71277b | 4504 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4505 | if (ret < 0) { |
6beb2242 | 4506 | if (errno != EEXIST) { |
f11e84c2 | 4507 | PERROR("mkdir"); |
3bd1e081 | 4508 | ERR("Failed to create %s", path); |
6beb2242 DG |
4509 | goto error; |
4510 | } | |
f11e84c2 | 4511 | ret = -1; |
d6f42150 | 4512 | } |
6c71277b MD |
4513 | if (is_root) { |
4514 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4515 | if (ret < 0) { | |
4516 | ERR("Unable to set group on %s", path); | |
4517 | PERROR("chown"); | |
4518 | goto error; | |
4519 | } | |
4520 | } | |
d6f42150 DG |
4521 | |
4522 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4523 | consumer_data->err_sock = |
4524 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4525 | if (consumer_data->err_sock < 0) { | |
4526 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4527 | ret = -1; |
4528 | goto error; | |
4529 | } | |
4530 | ||
a24f05ab MD |
4531 | /* |
4532 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4533 | * show must go on. | |
4534 | */ | |
4535 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4536 | if (ret < 0) { | |
4537 | PERROR("utils_set_fd_cloexec"); | |
4538 | /* continue anyway */ | |
4539 | } | |
4540 | ||
d6f42150 | 4541 | /* File permission MUST be 660 */ |
3bd1e081 | 4542 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4543 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4544 | if (ret < 0) { |
3bd1e081 | 4545 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4546 | PERROR("chmod"); |
d6f42150 DG |
4547 | goto error; |
4548 | } | |
4549 | ||
4550 | error: | |
4551 | return ret; | |
4552 | } | |
4553 | ||
fac6795d | 4554 | /* |
d063d709 | 4555 | * Signal handler for the daemon |
cf3af59e | 4556 | * |
54d01ffb DG |
4557 | * Simply stop all worker threads, leaving main() return gracefully after |
4558 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4559 | */ |
4560 | static void sighandler(int sig) | |
4561 | { | |
4562 | switch (sig) { | |
cf3af59e | 4563 | case SIGPIPE: |
af87c45a | 4564 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4565 | return; |
4566 | case SIGINT: | |
af87c45a | 4567 | DBG("SIGINT caught"); |
cf3af59e MD |
4568 | stop_threads(); |
4569 | break; | |
4570 | case SIGTERM: | |
af87c45a | 4571 | DBG("SIGTERM caught"); |
cf3af59e MD |
4572 | stop_threads(); |
4573 | break; | |
0bb7724a DG |
4574 | case SIGUSR1: |
4575 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4576 | break; | |
cf3af59e MD |
4577 | default: |
4578 | break; | |
fac6795d | 4579 | } |
fac6795d DG |
4580 | } |
4581 | ||
4582 | /* | |
d063d709 | 4583 | * Setup signal handler for : |
1d4b027a | 4584 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4585 | */ |
1d4b027a | 4586 | static int set_signal_handler(void) |
fac6795d | 4587 | { |
1d4b027a DG |
4588 | int ret = 0; |
4589 | struct sigaction sa; | |
4590 | sigset_t sigset; | |
fac6795d | 4591 | |
1d4b027a | 4592 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4593 | PERROR("sigemptyset"); |
1d4b027a DG |
4594 | return ret; |
4595 | } | |
d6f42150 | 4596 | |
1d4b027a DG |
4597 | sa.sa_handler = sighandler; |
4598 | sa.sa_mask = sigset; | |
4599 | sa.sa_flags = 0; | |
4600 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4601 | PERROR("sigaction"); |
1d4b027a | 4602 | return ret; |
d6f42150 DG |
4603 | } |
4604 | ||
1d4b027a | 4605 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4606 | PERROR("sigaction"); |
1d4b027a | 4607 | return ret; |
d6f42150 | 4608 | } |
aaf26714 | 4609 | |
1d4b027a | 4610 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4611 | PERROR("sigaction"); |
1d4b027a | 4612 | return ret; |
8c0faa1d DG |
4613 | } |
4614 | ||
0bb7724a DG |
4615 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4616 | PERROR("sigaction"); | |
4617 | return ret; | |
4618 | } | |
4619 | ||
4620 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4621 | |
4622 | return ret; | |
fac6795d DG |
4623 | } |
4624 | ||
f3ed775e | 4625 | /* |
d063d709 DG |
4626 | * Set open files limit to unlimited. This daemon can open a large number of |
4627 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4628 | */ |
4629 | static void set_ulimit(void) | |
4630 | { | |
4631 | int ret; | |
4632 | struct rlimit lim; | |
4633 | ||
a88df331 | 4634 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4635 | lim.rlim_cur = 65535; |
4636 | lim.rlim_max = 65535; | |
4637 | ||
4638 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4639 | if (ret < 0) { | |
76d7553f | 4640 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4641 | } |
4642 | } | |
4643 | ||
35f90c40 DG |
4644 | /* |
4645 | * Write pidfile using the rundir and opt_pidfile. | |
4646 | */ | |
4647 | static void write_pidfile(void) | |
4648 | { | |
4649 | int ret; | |
4650 | char pidfile_path[PATH_MAX]; | |
4651 | ||
4652 | assert(rundir); | |
4653 | ||
4654 | if (opt_pidfile) { | |
4655 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4656 | } else { | |
4657 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4658 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4659 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4660 | if (ret < 0) { | |
4661 | PERROR("snprintf pidfile path"); | |
4662 | goto error; | |
4663 | } | |
4664 | } | |
4665 | ||
4666 | /* | |
4667 | * Create pid file in rundir. Return value is of no importance. The | |
4668 | * execution will continue even though we are not able to write the file. | |
4669 | */ | |
4670 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4671 | ||
4672 | error: | |
4673 | return; | |
4674 | } | |
4675 | ||
cd9290dd DG |
4676 | /* |
4677 | * Write JUL TCP port using the rundir. | |
4678 | */ | |
4679 | static void write_julport(void) | |
4680 | { | |
4681 | int ret; | |
4682 | char path[PATH_MAX]; | |
4683 | ||
4684 | assert(rundir); | |
4685 | ||
4686 | ret = snprintf(path, sizeof(path), "%s/" | |
4687 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4688 | if (ret < 0) { | |
4689 | PERROR("snprintf julport path"); | |
4690 | goto error; | |
4691 | } | |
4692 | ||
4693 | /* | |
4694 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4695 | * The execution will continue even though we are not able to write the | |
4696 | * file. | |
4697 | */ | |
4698 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4699 | ||
4700 | error: | |
4701 | return; | |
4702 | } | |
4703 | ||
fac6795d DG |
4704 | /* |
4705 | * main | |
4706 | */ | |
4707 | int main(int argc, char **argv) | |
4708 | { | |
fac6795d DG |
4709 | int ret = 0; |
4710 | void *status; | |
ae9e45b3 | 4711 | const char *home_path, *env_app_timeout; |
fac6795d | 4712 | |
335a95b7 MD |
4713 | init_kernel_workarounds(); |
4714 | ||
f6a9efaa DG |
4715 | rcu_register_thread(); |
4716 | ||
0bb7724a DG |
4717 | if ((ret = set_signal_handler()) < 0) { |
4718 | goto error; | |
4719 | } | |
4720 | ||
7753dea8 | 4721 | setup_consumerd_path(); |
fb09408a | 4722 | |
12744796 DG |
4723 | page_size = sysconf(_SC_PAGESIZE); |
4724 | if (page_size < 0) { | |
4725 | PERROR("sysconf _SC_PAGESIZE"); | |
4726 | page_size = LONG_MAX; | |
4727 | WARN("Fallback page size to %ld", page_size); | |
4728 | } | |
4729 | ||
26296c48 | 4730 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 4731 | progname = argv[0]; |
26296c48 | 4732 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 4733 | goto error; |
fac6795d DG |
4734 | } |
4735 | ||
4736 | /* Daemonize */ | |
72dd7491 | 4737 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
4738 | int i; |
4739 | ||
72dd7491 MD |
4740 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
4741 | !opt_background); | |
53094c05 | 4742 | if (ret < 0) { |
cf3af59e | 4743 | goto error; |
53094c05 | 4744 | } |
0bb7724a | 4745 | |
ceed52b5 | 4746 | /* |
0bb7724a DG |
4747 | * We are in the child. Make sure all other file descriptors are |
4748 | * closed, in case we are called with more opened file descriptors than | |
4749 | * the standard ones. | |
ceed52b5 MD |
4750 | */ |
4751 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4752 | (void) close(i); | |
4753 | } | |
4754 | } | |
4755 | ||
4756 | /* Create thread quit pipe */ | |
4757 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4758 | goto error; | |
fac6795d DG |
4759 | } |
4760 | ||
4761 | /* Check if daemon is UID = 0 */ | |
4762 | is_root = !getuid(); | |
4763 | ||
fac6795d | 4764 | if (is_root) { |
990570ed | 4765 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4766 | |
4767 | /* Create global run dir with root access */ | |
4768 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4769 | if (ret < 0) { |
cf3af59e | 4770 | goto error; |
d6f42150 DG |
4771 | } |
4772 | ||
fac6795d | 4773 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4774 | snprintf(apps_unix_sock_path, PATH_MAX, |
4775 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4776 | } |
4777 | ||
4778 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4779 | snprintf(client_unix_sock_path, PATH_MAX, |
4780 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4781 | } | |
0fdd1e2c DG |
4782 | |
4783 | /* Set global SHM for ust */ | |
4784 | if (strlen(wait_shm_path) == 0) { | |
4785 | snprintf(wait_shm_path, PATH_MAX, | |
4786 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4787 | } | |
67e40797 | 4788 | |
44a5e5eb DG |
4789 | if (strlen(health_unix_sock_path) == 0) { |
4790 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4791 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4792 | } | |
4793 | ||
67e40797 DG |
4794 | /* Setup kernel consumerd path */ |
4795 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4796 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4797 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4798 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4799 | |
4800 | DBG2("Kernel consumer err path: %s", | |
4801 | kconsumer_data.err_unix_sock_path); | |
4802 | DBG2("Kernel consumer cmd path: %s", | |
4803 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4804 | } else { |
feb0f3e5 | 4805 | home_path = utils_get_home_dir(); |
b082db07 | 4806 | if (home_path == NULL) { |
273ea72c DG |
4807 | /* TODO: Add --socket PATH option */ |
4808 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4809 | ret = -EPERM; |
4810 | goto error; | |
b082db07 DG |
4811 | } |
4812 | ||
67e40797 DG |
4813 | /* |
4814 | * Create rundir from home path. This will create something like | |
4815 | * $HOME/.lttng | |
4816 | */ | |
990570ed | 4817 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4818 | if (ret < 0) { |
4819 | ret = -ENOMEM; | |
4820 | goto error; | |
4821 | } | |
4822 | ||
4823 | ret = create_lttng_rundir(rundir); | |
4824 | if (ret < 0) { | |
4825 | goto error; | |
4826 | } | |
4827 | ||
fac6795d | 4828 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4829 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4830 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4831 | } |
4832 | ||
4833 | /* Set the cli tool unix socket path */ | |
4834 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4835 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4836 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4837 | } |
0fdd1e2c DG |
4838 | |
4839 | /* Set global SHM for ust */ | |
4840 | if (strlen(wait_shm_path) == 0) { | |
4841 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4842 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4843 | } |
44a5e5eb DG |
4844 | |
4845 | /* Set health check Unix path */ | |
4846 | if (strlen(health_unix_sock_path) == 0) { | |
4847 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4848 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4849 | } | |
fac6795d DG |
4850 | } |
4851 | ||
5c827ce0 DG |
4852 | /* Set consumer initial state */ |
4853 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4854 | ust_consumerd_state = CONSUMER_STOPPED; | |
4855 | ||
847177cd DG |
4856 | DBG("Client socket path %s", client_unix_sock_path); |
4857 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4858 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4859 | DBG("LTTng run directory path: %s", rundir); |
4860 | ||
4861 | /* 32 bits consumerd path setup */ | |
4862 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4863 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4864 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4865 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4866 | |
4867 | DBG2("UST consumer 32 bits err path: %s", | |
4868 | ustconsumer32_data.err_unix_sock_path); | |
4869 | DBG2("UST consumer 32 bits cmd path: %s", | |
4870 | ustconsumer32_data.cmd_unix_sock_path); | |
4871 | ||
4872 | /* 64 bits consumerd path setup */ | |
4873 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4874 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4875 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4876 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4877 | |
4878 | DBG2("UST consumer 64 bits err path: %s", | |
4879 | ustconsumer64_data.err_unix_sock_path); | |
4880 | DBG2("UST consumer 64 bits cmd path: %s", | |
4881 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4882 | |
273ea72c | 4883 | /* |
7d8234d9 | 4884 | * See if daemon already exist. |
fac6795d | 4885 | */ |
7d8234d9 | 4886 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4887 | ERR("Already running daemon.\n"); |
273ea72c | 4888 | /* |
cf3af59e MD |
4889 | * We do not goto exit because we must not cleanup() |
4890 | * because a daemon is already running. | |
ab118b20 | 4891 | */ |
cf3af59e | 4892 | goto error; |
a88df331 DG |
4893 | } |
4894 | ||
1427f9b2 DG |
4895 | /* |
4896 | * Init UST app hash table. Alloc hash table before this point since | |
4897 | * cleanup() can get called after that point. | |
4898 | */ | |
4899 | ust_app_ht_alloc(); | |
4900 | ||
f20baf8e DG |
4901 | /* Initialize JUL domain subsystem. */ |
4902 | if ((ret = jul_init()) < 0) { | |
4903 | /* ENOMEM at this point. */ | |
4904 | goto error; | |
4905 | } | |
4906 | ||
54d01ffb | 4907 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4908 | |
4909 | /* | |
4910 | * These actions must be executed as root. We do that *after* setting up | |
4911 | * the sockets path because we MUST make the check for another daemon using | |
4912 | * those paths *before* trying to set the kernel consumer sockets and init | |
4913 | * kernel tracer. | |
4914 | */ | |
4915 | if (is_root) { | |
67e40797 | 4916 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4917 | if (ret < 0) { |
4918 | goto exit; | |
4919 | } | |
4920 | ||
a88df331 | 4921 | /* Setup kernel tracer */ |
4fba7219 DG |
4922 | if (!opt_no_kernel) { |
4923 | init_kernel_tracer(); | |
4924 | } | |
a88df331 DG |
4925 | |
4926 | /* Set ulimit for open files */ | |
4927 | set_ulimit(); | |
fac6795d | 4928 | } |
4063050c MD |
4929 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4930 | lttng_fd_init(); | |
fac6795d | 4931 | |
67e40797 DG |
4932 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4933 | if (ret < 0) { | |
4934 | goto exit; | |
4935 | } | |
4936 | ||
4937 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4938 | if (ret < 0) { | |
4939 | goto exit; | |
4940 | } | |
4941 | ||
d6f42150 | 4942 | /* Setup the needed unix socket */ |
cf3af59e MD |
4943 | if ((ret = init_daemon_socket()) < 0) { |
4944 | goto exit; | |
fac6795d DG |
4945 | } |
4946 | ||
4947 | /* Set credentials to socket */ | |
be040666 | 4948 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4949 | goto exit; |
fac6795d DG |
4950 | } |
4951 | ||
5b8719f5 DG |
4952 | /* Get parent pid if -S, --sig-parent is specified. */ |
4953 | if (opt_sig_parent) { | |
4954 | ppid = getppid(); | |
4955 | } | |
4956 | ||
7a485870 | 4957 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4958 | if (is_root && !opt_no_kernel) { |
4959 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4960 | goto exit; | |
4961 | } | |
7a485870 DG |
4962 | } |
4963 | ||
0b2dc8df MD |
4964 | /* Setup the thread ht_cleanup communication pipe. */ |
4965 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
4966 | goto exit; | |
4967 | } | |
4968 | ||
099e26bd | 4969 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4970 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4971 | goto exit; |
4972 | } | |
4973 | ||
d0b96690 DG |
4974 | /* Setup the thread apps notify communication pipe. */ |
4975 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4976 | goto exit; | |
4977 | } | |
4978 | ||
7972aab2 DG |
4979 | /* Initialize global buffer per UID and PID registry. */ |
4980 | buffer_reg_init_uid_registry(); | |
4981 | buffer_reg_init_pid_registry(); | |
4982 | ||
099e26bd DG |
4983 | /* Init UST command queue. */ |
4984 | cds_wfq_init(&ust_cmd_queue.queue); | |
4985 | ||
273ea72c | 4986 | /* |
54d01ffb DG |
4987 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4988 | * statically declared in session.c | |
273ea72c | 4989 | */ |
54d01ffb | 4990 | session_list_ptr = session_get_list(); |
b5541356 | 4991 | |
5eb91c98 DG |
4992 | /* Set up max poll set size */ |
4993 | lttng_poll_set_max_size(); | |
4994 | ||
2f77fc4b | 4995 | cmd_init(); |
00e2e675 | 4996 | |
ae9e45b3 DG |
4997 | /* Check for the application socket timeout env variable. */ |
4998 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4999 | if (env_app_timeout) { | |
5000 | app_socket_timeout = atoi(env_app_timeout); | |
5001 | } else { | |
5002 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5003 | } | |
5004 | ||
35f90c40 | 5005 | write_pidfile(); |
cd9290dd | 5006 | write_julport(); |
35f90c40 | 5007 | |
554831e7 MD |
5008 | /* Initialize communication library */ |
5009 | lttcomm_init(); | |
d831c249 DG |
5010 | /* This is to get the TCP timeout value. */ |
5011 | lttcomm_inet_init(); | |
554831e7 | 5012 | |
67e05644 DG |
5013 | /* |
5014 | * Initialize the health check subsystem. This call should set the | |
5015 | * appropriate time values. | |
5016 | */ | |
6c71277b | 5017 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5018 | if (!health_sessiond) { |
5019 | PERROR("health_app_create error"); | |
5020 | goto exit_health_sessiond_cleanup; | |
5021 | } | |
67e05644 | 5022 | |
d5b9fd2f | 5023 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5024 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5025 | thread_ht_cleanup, (void *) NULL); | |
5026 | if (ret != 0) { | |
5027 | PERROR("pthread_create ht_cleanup"); | |
5028 | goto exit_ht_cleanup; | |
5029 | } | |
5030 | ||
d5b9fd2f | 5031 | /* Create health-check thread */ |
44a5e5eb DG |
5032 | ret = pthread_create(&health_thread, NULL, |
5033 | thread_manage_health, (void *) NULL); | |
5034 | if (ret != 0) { | |
5035 | PERROR("pthread_create health"); | |
5036 | goto exit_health; | |
5037 | } | |
5038 | ||
cf3af59e | 5039 | /* Create thread to manage the client socket */ |
099e26bd DG |
5040 | ret = pthread_create(&client_thread, NULL, |
5041 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5042 | if (ret != 0) { |
76d7553f | 5043 | PERROR("pthread_create clients"); |
cf3af59e MD |
5044 | goto exit_client; |
5045 | } | |
fac6795d | 5046 | |
099e26bd DG |
5047 | /* Create thread to dispatch registration */ |
5048 | ret = pthread_create(&dispatch_thread, NULL, | |
5049 | thread_dispatch_ust_registration, (void *) NULL); | |
5050 | if (ret != 0) { | |
76d7553f | 5051 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5052 | goto exit_dispatch; |
5053 | } | |
5054 | ||
5055 | /* Create thread to manage application registration. */ | |
5056 | ret = pthread_create(®_apps_thread, NULL, | |
5057 | thread_registration_apps, (void *) NULL); | |
5058 | if (ret != 0) { | |
76d7553f | 5059 | PERROR("pthread_create registration"); |
099e26bd DG |
5060 | goto exit_reg_apps; |
5061 | } | |
5062 | ||
cf3af59e | 5063 | /* Create thread to manage application socket */ |
54d01ffb DG |
5064 | ret = pthread_create(&apps_thread, NULL, |
5065 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5066 | if (ret != 0) { |
d0b96690 DG |
5067 | PERROR("pthread_create apps"); |
5068 | goto exit_apps; | |
5069 | } | |
5070 | ||
5071 | /* Create thread to manage application notify socket */ | |
5072 | ret = pthread_create(&apps_notify_thread, NULL, | |
5073 | ust_thread_manage_notify, (void *) NULL); | |
5074 | if (ret != 0) { | |
76d7553f | 5075 | PERROR("pthread_create apps"); |
9563b0ad | 5076 | goto exit_apps_notify; |
cf3af59e | 5077 | } |
fac6795d | 5078 | |
4d076222 DG |
5079 | /* Create JUL registration thread. */ |
5080 | ret = pthread_create(&jul_reg_thread, NULL, | |
5081 | jul_thread_manage_registration, (void *) NULL); | |
5082 | if (ret != 0) { | |
5083 | PERROR("pthread_create apps"); | |
5084 | goto exit_jul_reg; | |
5085 | } | |
5086 | ||
6620da75 DG |
5087 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5088 | if (is_root && !opt_no_kernel) { | |
5089 | /* Create kernel thread to manage kernel event */ | |
5090 | ret = pthread_create(&kernel_thread, NULL, | |
5091 | thread_manage_kernel, (void *) NULL); | |
5092 | if (ret != 0) { | |
5093 | PERROR("pthread_create kernel"); | |
5094 | goto exit_kernel; | |
5095 | } | |
7a485870 | 5096 | |
6620da75 DG |
5097 | ret = pthread_join(kernel_thread, &status); |
5098 | if (ret != 0) { | |
5099 | PERROR("pthread_join"); | |
5100 | goto error; /* join error, exit without cleanup */ | |
5101 | } | |
fac6795d DG |
5102 | } |
5103 | ||
cf3af59e | 5104 | exit_kernel: |
4d076222 DG |
5105 | ret = pthread_join(jul_reg_thread, &status); |
5106 | if (ret != 0) { | |
5107 | PERROR("pthread_join JUL"); | |
5108 | goto error; /* join error, exit without cleanup */ | |
5109 | } | |
5110 | ||
5111 | exit_jul_reg: | |
9563b0ad DG |
5112 | ret = pthread_join(apps_notify_thread, &status); |
5113 | if (ret != 0) { | |
5114 | PERROR("pthread_join apps notify"); | |
5115 | goto error; /* join error, exit without cleanup */ | |
5116 | } | |
5117 | ||
5118 | exit_apps_notify: | |
cf3af59e MD |
5119 | ret = pthread_join(apps_thread, &status); |
5120 | if (ret != 0) { | |
9563b0ad | 5121 | PERROR("pthread_join apps"); |
cf3af59e MD |
5122 | goto error; /* join error, exit without cleanup */ |
5123 | } | |
fac6795d | 5124 | |
4ccd8c8f | 5125 | |
cf3af59e | 5126 | exit_apps: |
099e26bd DG |
5127 | ret = pthread_join(reg_apps_thread, &status); |
5128 | if (ret != 0) { | |
76d7553f | 5129 | PERROR("pthread_join"); |
099e26bd DG |
5130 | goto error; /* join error, exit without cleanup */ |
5131 | } | |
5132 | ||
5133 | exit_reg_apps: | |
5134 | ret = pthread_join(dispatch_thread, &status); | |
5135 | if (ret != 0) { | |
76d7553f | 5136 | PERROR("pthread_join"); |
099e26bd DG |
5137 | goto error; /* join error, exit without cleanup */ |
5138 | } | |
5139 | ||
5140 | exit_dispatch: | |
cf3af59e MD |
5141 | ret = pthread_join(client_thread, &status); |
5142 | if (ret != 0) { | |
76d7553f | 5143 | PERROR("pthread_join"); |
cf3af59e MD |
5144 | goto error; /* join error, exit without cleanup */ |
5145 | } | |
5146 | ||
3bd1e081 | 5147 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5148 | if (ret != 0) { |
76d7553f | 5149 | PERROR("join_consumer"); |
cf3af59e MD |
5150 | goto error; /* join error, exit without cleanup */ |
5151 | } | |
a88df331 | 5152 | |
06f525de DG |
5153 | ret = join_consumer_thread(&ustconsumer32_data); |
5154 | if (ret != 0) { | |
5155 | PERROR("join_consumer ust32"); | |
5156 | goto error; /* join error, exit without cleanup */ | |
5157 | } | |
5158 | ||
5159 | ret = join_consumer_thread(&ustconsumer64_data); | |
5160 | if (ret != 0) { | |
5161 | PERROR("join_consumer ust64"); | |
5162 | goto error; /* join error, exit without cleanup */ | |
5163 | } | |
5164 | ||
cf3af59e | 5165 | exit_client: |
06f525de DG |
5166 | ret = pthread_join(health_thread, &status); |
5167 | if (ret != 0) { | |
5168 | PERROR("pthread_join health thread"); | |
5169 | goto error; /* join error, exit without cleanup */ | |
5170 | } | |
5171 | ||
44a5e5eb | 5172 | exit_health: |
0b2dc8df MD |
5173 | ret = pthread_join(ht_cleanup_thread, &status); |
5174 | if (ret != 0) { | |
5175 | PERROR("pthread_join ht cleanup thread"); | |
5176 | goto error; /* join error, exit without cleanup */ | |
5177 | } | |
5178 | exit_ht_cleanup: | |
8782cc74 MD |
5179 | health_app_destroy(health_sessiond); |
5180 | exit_health_sessiond_cleanup: | |
a88df331 | 5181 | exit: |
cf3af59e MD |
5182 | /* |
5183 | * cleanup() is called when no other thread is running. | |
5184 | */ | |
f6a9efaa | 5185 | rcu_thread_online(); |
cf3af59e | 5186 | cleanup(); |
f6a9efaa DG |
5187 | rcu_thread_offline(); |
5188 | rcu_unregister_thread(); | |
67e40797 | 5189 | if (!ret) { |
cf3af59e | 5190 | exit(EXIT_SUCCESS); |
67e40797 | 5191 | } |
cf3af59e | 5192 | error: |
5e16da05 | 5193 | exit(EXIT_FAILURE); |
fac6795d | 5194 | } |