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" |
fb198a11 | 71 | #include "save.h" |
ef367a93 | 72 | #include "load-session-thread.h" |
fac6795d | 73 | |
ebaeda94 MD |
74 | #define CONSUMERD_FILE "lttng-consumerd" |
75 | ||
fac6795d | 76 | const char *progname; |
6c71277b | 77 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
78 | static int tracing_group_name_override; |
79 | static char *opt_pidfile; | |
5b8719f5 | 80 | static int opt_sig_parent; |
97e19046 | 81 | static int opt_verbose_consumer; |
72dd7491 | 82 | static int opt_daemon, opt_background; |
4fba7219 | 83 | static int opt_no_kernel; |
ef367a93 | 84 | static char *opt_load_session_path; |
1d4b027a | 85 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 86 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 87 | static char *rundir; |
4ef4b5a2 | 88 | static int lockfile_fd = -1; |
3bd1e081 | 89 | |
0bb7724a DG |
90 | /* Set to 1 when a SIGUSR1 signal is received. */ |
91 | static int recv_child_signal; | |
92 | ||
a23ec3a7 DG |
93 | /* |
94 | * Consumer daemon specific control data. Every value not initialized here is | |
95 | * set to 0 by the static definition. | |
96 | */ | |
3bd1e081 MD |
97 | static struct consumer_data kconsumer_data = { |
98 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
99 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
100 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
101 | .err_sock = -1, |
102 | .cmd_sock = -1, | |
173af62f DG |
103 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
104 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
105 | .cond = PTHREAD_COND_INITIALIZER, |
106 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 107 | }; |
7753dea8 MD |
108 | static struct consumer_data ustconsumer64_data = { |
109 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
110 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
111 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
112 | .err_sock = -1, |
113 | .cmd_sock = -1, | |
173af62f DG |
114 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
115 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
116 | .cond = PTHREAD_COND_INITIALIZER, |
117 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
118 | }; |
119 | static struct consumer_data ustconsumer32_data = { | |
120 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
121 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
122 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
123 | .err_sock = -1, |
124 | .cmd_sock = -1, | |
173af62f DG |
125 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
126 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
127 | .cond = PTHREAD_COND_INITIALIZER, |
128 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
129 | }; |
130 | ||
26296c48 JG |
131 | /* Command line options */ |
132 | static const struct option long_options[] = { | |
133 | { "client-sock", 1, 0, 'c' }, | |
134 | { "apps-sock", 1, 0, 'a' }, | |
135 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, | |
136 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
137 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, | |
138 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
139 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, | |
140 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
141 | { "consumerd32-path", 1, 0, 'u' }, | |
142 | { "consumerd32-libdir", 1, 0, 'U' }, | |
143 | { "consumerd64-path", 1, 0, 't' }, | |
144 | { "consumerd64-libdir", 1, 0, 'T' }, | |
145 | { "daemonize", 0, 0, 'd' }, | |
72dd7491 | 146 | { "background", 0, 0, 'b' }, |
26296c48 JG |
147 | { "sig-parent", 0, 0, 'S' }, |
148 | { "help", 0, 0, 'h' }, | |
149 | { "group", 1, 0, 'g' }, | |
150 | { "version", 0, 0, 'V' }, | |
151 | { "quiet", 0, 0, 'q' }, | |
152 | { "verbose", 0, 0, 'v' }, | |
153 | { "verbose-consumer", 0, 0, 'Z' }, | |
154 | { "no-kernel", 0, 0, 'N' }, | |
155 | { "pidfile", 1, 0, 'p' }, | |
156 | { "jul-tcp-port", 1, 0, 'J' }, | |
157 | { "config", 1, 0, 'f' }, | |
ef367a93 | 158 | { "load", 1, 0, 'l' }, |
fbb9748b | 159 | { "kmod-probes", 1, 0, 'P' }, |
26296c48 JG |
160 | { NULL, 0, 0, 0 } |
161 | }; | |
162 | ||
163 | /* Command line options to ignore from configuration file */ | |
164 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
165 | ||
26c9d55e | 166 | /* Shared between threads */ |
099e26bd | 167 | static int dispatch_thread_exit; |
fac6795d | 168 | |
54d01ffb DG |
169 | /* Global application Unix socket path */ |
170 | static char apps_unix_sock_path[PATH_MAX]; | |
171 | /* Global client Unix socket path */ | |
172 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
173 | /* global wait shm path for UST */ |
174 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
175 | /* Global health check unix path */ |
176 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 177 | |
1d4b027a | 178 | /* Sockets and FDs */ |
a4b35e07 MD |
179 | static int client_sock = -1; |
180 | static int apps_sock = -1; | |
2f77fc4b | 181 | int kernel_tracer_fd = -1; |
76d7553f | 182 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 183 | |
273ea72c DG |
184 | /* |
185 | * Quit pipe for all threads. This permits a single cancellation point | |
186 | * for all threads when receiving an event on the pipe. | |
187 | */ | |
76d7553f | 188 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 189 | |
099e26bd DG |
190 | /* |
191 | * This pipe is used to inform the thread managing application communication | |
192 | * that a command is queued and ready to be processed. | |
193 | */ | |
76d7553f | 194 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 195 | |
d0b96690 DG |
196 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
197 | ||
1d4b027a | 198 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 199 | static pthread_t apps_thread; |
d0b96690 | 200 | static pthread_t apps_notify_thread; |
099e26bd | 201 | static pthread_t reg_apps_thread; |
1d4b027a | 202 | static pthread_t client_thread; |
7a485870 | 203 | static pthread_t kernel_thread; |
099e26bd | 204 | static pthread_t dispatch_thread; |
44a5e5eb | 205 | static pthread_t health_thread; |
0b2dc8df | 206 | static pthread_t ht_cleanup_thread; |
4d076222 | 207 | static pthread_t jul_reg_thread; |
ef367a93 | 208 | static pthread_t load_session_thread; |
5eb91c98 | 209 | |
099e26bd DG |
210 | /* |
211 | * UST registration command queue. This queue is tied with a futex and uses a N | |
212 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
213 | * | |
b22c5da8 DG |
214 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
215 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
216 | * the line new application socket and monitors it for any I/O error or clean | |
217 | * close that triggers an unregistration of the application. | |
099e26bd DG |
218 | */ |
219 | static struct ust_cmd_queue ust_cmd_queue; | |
220 | ||
b5541356 DG |
221 | /* |
222 | * Pointer initialized before thread creation. | |
223 | * | |
224 | * This points to the tracing session list containing the session count and a | |
225 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
226 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 227 | * |
d063d709 | 228 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 229 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
230 | */ |
231 | static struct ltt_session_list *session_list_ptr; | |
232 | ||
7753dea8 MD |
233 | int ust_consumerd64_fd = -1; |
234 | int ust_consumerd32_fd = -1; | |
235 | ||
fb6f1fa2 YB |
236 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
237 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
238 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
239 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
240 | static int consumerd32_bin_override; |
241 | static int consumerd64_bin_override; | |
242 | static int consumerd32_libdir_override; | |
243 | static int consumerd64_libdir_override; | |
fb09408a | 244 | |
2f77fc4b DG |
245 | static const char *module_proc_lttng = "/proc/lttng"; |
246 | ||
5c827ce0 DG |
247 | /* |
248 | * Consumer daemon state which is changed when spawning it, killing it or in | |
249 | * case of a fatal error. | |
250 | */ | |
251 | enum consumerd_state { | |
252 | CONSUMER_STARTED = 1, | |
253 | CONSUMER_STOPPED = 2, | |
254 | CONSUMER_ERROR = 3, | |
255 | }; | |
256 | ||
257 | /* | |
258 | * This consumer daemon state is used to validate if a client command will be | |
259 | * able to reach the consumer. If not, the client is informed. For instance, | |
260 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
261 | * error to the client. | |
262 | * | |
263 | * The following example shows a possible race condition of this scheme: | |
264 | * | |
265 | * consumer thread error happens | |
266 | * client cmd arrives | |
267 | * client cmd checks state -> still OK | |
268 | * consumer thread exit, sets error | |
269 | * client cmd try to talk to consumer | |
270 | * ... | |
271 | * | |
272 | * However, since the consumer is a different daemon, we have no way of making | |
273 | * sure the command will reach it safely even with this state flag. This is why | |
274 | * we consider that up to the state validation during command processing, the | |
275 | * command is safe. After that, we can not guarantee the correctness of the | |
276 | * client request vis-a-vis the consumer. | |
277 | */ | |
278 | static enum consumerd_state ust_consumerd_state; | |
279 | static enum consumerd_state kernel_consumerd_state; | |
280 | ||
ae9e45b3 DG |
281 | /* |
282 | * Socket timeout for receiving and sending in seconds. | |
283 | */ | |
284 | static int app_socket_timeout; | |
285 | ||
12744796 DG |
286 | /* Set in main() with the current page size. */ |
287 | long page_size; | |
288 | ||
8782cc74 MD |
289 | /* Application health monitoring */ |
290 | struct health_app *health_sessiond; | |
291 | ||
4d076222 DG |
292 | /* JUL TCP port for registration. Used by the JUL thread. */ |
293 | unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT; | |
294 | ||
f43f95a9 DG |
295 | /* Am I root or not. */ |
296 | int is_root; /* Set to 1 if the daemon is running as root */ | |
297 | ||
26296c48 JG |
298 | const char * const config_section_name = "sessiond"; |
299 | ||
ef367a93 JG |
300 | /* Load session thread information to operate. */ |
301 | struct load_session_thread_data *load_info; | |
302 | ||
97bc1426 MD |
303 | /* |
304 | * Whether sessiond is ready for commands/health check requests. | |
305 | * NR_LTTNG_SESSIOND_READY must match the number of calls to | |
ef367a93 | 306 | * sessiond_notify_ready(). |
97bc1426 | 307 | */ |
ef367a93 | 308 | #define NR_LTTNG_SESSIOND_READY 3 |
97bc1426 MD |
309 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
310 | ||
311 | /* Notify parents that we are ready for cmd and health check */ | |
ef367a93 JG |
312 | LTTNG_HIDDEN |
313 | void sessiond_notify_ready(void) | |
97bc1426 MD |
314 | { |
315 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
316 | /* | |
317 | * Notify parent pid that we are ready to accept command | |
318 | * for client side. This ppid is the one from the | |
319 | * external process that spawned us. | |
320 | */ | |
321 | if (opt_sig_parent) { | |
322 | kill(ppid, SIGUSR1); | |
323 | } | |
324 | ||
325 | /* | |
326 | * Notify the parent of the fork() process that we are | |
327 | * ready. | |
328 | */ | |
72dd7491 | 329 | if (opt_daemon || opt_background) { |
97bc1426 MD |
330 | kill(child_ppid, SIGUSR1); |
331 | } | |
332 | } | |
333 | } | |
334 | ||
fb09408a | 335 | static |
7753dea8 | 336 | void setup_consumerd_path(void) |
fb09408a | 337 | { |
fc7a59ce | 338 | const char *bin, *libdir; |
fb09408a | 339 | |
7753dea8 MD |
340 | /* |
341 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
342 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
343 | * has not been defined. | |
7753dea8 | 344 | */ |
ebaeda94 | 345 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
346 | if (!consumerd32_bin[0]) { |
347 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
348 | } |
349 | if (!consumerd32_libdir[0]) { | |
350 | consumerd32_libdir = INSTALL_LIB_PATH; | |
351 | } | |
352 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
353 | if (!consumerd64_bin[0]) { |
354 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 355 | } |
ebaeda94 MD |
356 | if (!consumerd64_libdir[0]) { |
357 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
358 | } |
359 | #else | |
360 | #error "Unknown bitness" | |
361 | #endif | |
362 | ||
fb09408a MD |
363 | /* |
364 | * runtime env. var. overrides the build default. | |
365 | */ | |
fc7a59ce AM |
366 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
367 | if (bin) { | |
368 | consumerd32_bin = bin; | |
7753dea8 | 369 | } |
fc7a59ce AM |
370 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
371 | if (bin) { | |
372 | consumerd64_bin = bin; | |
ebaeda94 | 373 | } |
72f579ee | 374 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
375 | if (libdir) { |
376 | consumerd32_libdir = libdir; | |
377 | } | |
72f579ee | 378 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
379 | if (libdir) { |
380 | consumerd64_libdir = libdir; | |
fb09408a MD |
381 | } |
382 | } | |
383 | ||
5eb91c98 DG |
384 | /* |
385 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
386 | */ | |
d0b96690 | 387 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
388 | { |
389 | int ret; | |
390 | ||
d0b96690 | 391 | assert(events); |
5eb91c98 DG |
392 | |
393 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
394 | if (ret < 0) { | |
395 | goto error; | |
396 | } | |
397 | ||
398 | /* Add quit pipe */ | |
d0b96690 | 399 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
400 | if (ret < 0) { |
401 | goto error; | |
402 | } | |
403 | ||
404 | return 0; | |
405 | ||
406 | error: | |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
411 | * Check if the thread quit pipe was triggered. | |
412 | * | |
413 | * Return 1 if it was triggered else 0; | |
414 | */ | |
d0b96690 | 415 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
416 | { |
417 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
418 | return 1; | |
419 | } | |
420 | ||
421 | return 0; | |
422 | } | |
423 | ||
273ea72c | 424 | /* |
5eb91c98 | 425 | * Init thread quit pipe. |
273ea72c DG |
426 | * |
427 | * Return -1 on error or 0 if all pipes are created. | |
428 | */ | |
429 | static int init_thread_quit_pipe(void) | |
430 | { | |
730389d9 | 431 | int ret, i; |
273ea72c | 432 | |
730389d9 | 433 | ret = pipe(thread_quit_pipe); |
273ea72c | 434 | if (ret < 0) { |
730389d9 | 435 | PERROR("thread quit pipe"); |
273ea72c DG |
436 | goto error; |
437 | } | |
438 | ||
730389d9 DG |
439 | for (i = 0; i < 2; i++) { |
440 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
441 | if (ret < 0) { | |
442 | PERROR("fcntl"); | |
443 | goto error; | |
444 | } | |
445 | } | |
446 | ||
273ea72c DG |
447 | error: |
448 | return ret; | |
449 | } | |
450 | ||
099e26bd DG |
451 | /* |
452 | * Stop all threads by closing the thread quit pipe. | |
453 | */ | |
cf3af59e MD |
454 | static void stop_threads(void) |
455 | { | |
5eb91c98 DG |
456 | int ret; |
457 | ||
cf3af59e MD |
458 | /* Stopping all threads */ |
459 | DBG("Terminating all threads"); | |
54d01ffb | 460 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
461 | if (ret < 0) { |
462 | ERR("write error on thread quit pipe"); | |
463 | } | |
464 | ||
099e26bd | 465 | /* Dispatch thread */ |
26c9d55e | 466 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 467 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
468 | } |
469 | ||
e975f9f8 DG |
470 | /* |
471 | * Close every consumer sockets. | |
472 | */ | |
473 | static void close_consumer_sockets(void) | |
474 | { | |
475 | int ret; | |
476 | ||
477 | if (kconsumer_data.err_sock >= 0) { | |
478 | ret = close(kconsumer_data.err_sock); | |
479 | if (ret < 0) { | |
480 | PERROR("kernel consumer err_sock close"); | |
481 | } | |
482 | } | |
483 | if (ustconsumer32_data.err_sock >= 0) { | |
484 | ret = close(ustconsumer32_data.err_sock); | |
485 | if (ret < 0) { | |
a76cbd9f | 486 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
487 | } |
488 | } | |
489 | if (ustconsumer64_data.err_sock >= 0) { | |
490 | ret = close(ustconsumer64_data.err_sock); | |
491 | if (ret < 0) { | |
a76cbd9f | 492 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
493 | } |
494 | } | |
495 | if (kconsumer_data.cmd_sock >= 0) { | |
496 | ret = close(kconsumer_data.cmd_sock); | |
497 | if (ret < 0) { | |
498 | PERROR("kernel consumer cmd_sock close"); | |
499 | } | |
500 | } | |
501 | if (ustconsumer32_data.cmd_sock >= 0) { | |
502 | ret = close(ustconsumer32_data.cmd_sock); | |
503 | if (ret < 0) { | |
a76cbd9f | 504 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
505 | } |
506 | } | |
507 | if (ustconsumer64_data.cmd_sock >= 0) { | |
508 | ret = close(ustconsumer64_data.cmd_sock); | |
509 | if (ret < 0) { | |
a76cbd9f | 510 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
511 | } |
512 | } | |
513 | } | |
514 | ||
4ef4b5a2 JG |
515 | /* |
516 | * Generate the full lock file path using the rundir. | |
517 | * | |
518 | * Return the snprintf() return value thus a negative value is an error. | |
519 | */ | |
520 | static int generate_lock_file_path(char *path, size_t len) | |
521 | { | |
522 | int ret; | |
523 | ||
524 | assert(path); | |
525 | assert(rundir); | |
526 | ||
527 | /* Build lockfile path from rundir. */ | |
528 | ret = snprintf(path, len, "%s/" DEFAULT_LTTNG_SESSIOND_LOCKFILE, rundir); | |
529 | if (ret < 0) { | |
530 | PERROR("snprintf lockfile path"); | |
531 | } | |
532 | ||
533 | return ret; | |
534 | } | |
535 | ||
fac6795d | 536 | /* |
d063d709 | 537 | * Cleanup the daemon |
fac6795d | 538 | */ |
cf3af59e | 539 | static void cleanup(void) |
fac6795d | 540 | { |
ef599319 | 541 | int ret; |
af9737e9 | 542 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 543 | char path[PATH_MAX]; |
fac6795d | 544 | |
1d4b027a | 545 | DBG("Cleaning up"); |
e07ae692 | 546 | |
4e449f3f MD |
547 | /* |
548 | * Close the thread quit pipe. It has already done its job, | |
549 | * since we are now called. | |
550 | */ | |
2f77fc4b DG |
551 | utils_close_pipe(thread_quit_pipe); |
552 | ||
35f90c40 DG |
553 | /* |
554 | * If opt_pidfile is undefined, the default file will be wiped when | |
555 | * removing the rundir. | |
556 | */ | |
557 | if (opt_pidfile) { | |
558 | ret = remove(opt_pidfile); | |
559 | if (ret < 0) { | |
560 | PERROR("remove pidfile %s", opt_pidfile); | |
561 | } | |
562 | } | |
563 | ||
8c6c56c2 MD |
564 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
565 | ||
566 | /* sessiond */ | |
567 | snprintf(path, PATH_MAX, | |
568 | "%s/%s", | |
569 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
570 | DBG("Removing %s", path); | |
571 | (void) unlink(path); | |
572 | ||
cd9290dd DG |
573 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
574 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE); | |
575 | DBG("Removing %s", path); | |
576 | (void) unlink(path); | |
577 | ||
8c6c56c2 MD |
578 | /* kconsumerd */ |
579 | snprintf(path, PATH_MAX, | |
580 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
581 | rundir); | |
582 | DBG("Removing %s", path); | |
583 | (void) unlink(path); | |
584 | ||
585 | snprintf(path, PATH_MAX, | |
586 | DEFAULT_KCONSUMERD_PATH, | |
587 | rundir); | |
588 | DBG("Removing directory %s", path); | |
589 | (void) rmdir(path); | |
590 | ||
591 | /* ust consumerd 32 */ | |
592 | snprintf(path, PATH_MAX, | |
593 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
594 | rundir); | |
595 | DBG("Removing %s", path); | |
596 | (void) unlink(path); | |
597 | ||
598 | snprintf(path, PATH_MAX, | |
599 | DEFAULT_USTCONSUMERD32_PATH, | |
600 | rundir); | |
601 | DBG("Removing directory %s", path); | |
602 | (void) rmdir(path); | |
603 | ||
604 | /* ust consumerd 64 */ | |
605 | snprintf(path, PATH_MAX, | |
606 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
607 | rundir); | |
608 | DBG("Removing %s", path); | |
609 | (void) unlink(path); | |
610 | ||
611 | snprintf(path, PATH_MAX, | |
612 | DEFAULT_USTCONSUMERD64_PATH, | |
613 | rundir); | |
614 | DBG("Removing directory %s", path); | |
615 | (void) rmdir(path); | |
5461b305 | 616 | |
99bab54f | 617 | DBG("Cleaning up all sessions"); |
fac6795d | 618 | |
b5541356 | 619 | /* Destroy session list mutex */ |
273ea72c DG |
620 | if (session_list_ptr != NULL) { |
621 | pthread_mutex_destroy(&session_list_ptr->lock); | |
622 | ||
623 | /* Cleanup ALL session */ | |
54d01ffb DG |
624 | cds_list_for_each_entry_safe(sess, stmp, |
625 | &session_list_ptr->head, list) { | |
2f77fc4b | 626 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
627 | } |
628 | } | |
629 | ||
099e26bd | 630 | DBG("Closing all UST sockets"); |
56fff090 | 631 | ust_app_clean_list(); |
7972aab2 | 632 | buffer_reg_destroy_registries(); |
099e26bd | 633 | |
4fba7219 DG |
634 | if (is_root && !opt_no_kernel) { |
635 | DBG2("Closing kernel fd"); | |
a4b35e07 | 636 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
637 | ret = close(kernel_tracer_fd); |
638 | if (ret) { | |
639 | PERROR("close"); | |
640 | } | |
a4b35e07 | 641 | } |
2f50c8a3 | 642 | DBG("Unloading kernel modules"); |
096102bd | 643 | modprobe_remove_lttng_all(); |
2f50c8a3 | 644 | } |
2f77fc4b | 645 | |
e975f9f8 DG |
646 | close_consumer_sockets(); |
647 | ||
26296c48 JG |
648 | /* |
649 | * If the override option is set, the pointer points to a *non* const thus | |
650 | * freeing it even though the variable type is set to const. | |
651 | */ | |
652 | if (tracing_group_name_override) { | |
653 | free((void *) tracing_group_name); | |
654 | } | |
655 | if (consumerd32_bin_override) { | |
656 | free((void *) consumerd32_bin); | |
657 | } | |
658 | if (consumerd64_bin_override) { | |
659 | free((void *) consumerd64_bin); | |
660 | } | |
661 | if (consumerd32_libdir_override) { | |
662 | free((void *) consumerd32_libdir); | |
663 | } | |
664 | if (consumerd64_libdir_override) { | |
665 | free((void *) consumerd64_libdir); | |
666 | } | |
667 | ||
668 | if (opt_pidfile) { | |
669 | free(opt_pidfile); | |
670 | } | |
671 | ||
ef367a93 JG |
672 | if (opt_load_session_path) { |
673 | free(opt_load_session_path); | |
674 | } | |
675 | ||
676 | if (load_info) { | |
677 | load_session_destroy_data(load_info); | |
678 | free(load_info); | |
679 | } | |
680 | ||
4ef4b5a2 JG |
681 | /* |
682 | * Cleanup lock file by deleting it and finaly closing it which will | |
683 | * release the file system lock. | |
684 | */ | |
685 | if (lockfile_fd >= 0) { | |
686 | char lockfile_path[PATH_MAX]; | |
687 | ||
688 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
689 | if (ret > 0) { | |
690 | ret = remove(lockfile_path); | |
691 | if (ret < 0) { | |
692 | PERROR("remove lock file"); | |
693 | } | |
694 | ret = close(lockfile_fd); | |
695 | if (ret < 0) { | |
696 | PERROR("close lock file"); | |
697 | } | |
698 | } | |
699 | } | |
700 | ||
701 | /* | |
702 | * We do NOT rmdir rundir because there are other processes | |
703 | * using it, for instance lttng-relayd, which can start in | |
704 | * parallel with this teardown. | |
705 | */ | |
706 | ||
707 | free(rundir); | |
708 | ||
421cb601 | 709 | /* <fun> */ |
f56a39af | 710 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
711 | "Matthew, BEET driven development works!%c[%dm", |
712 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
713 | /* </fun> */ | |
fac6795d DG |
714 | } |
715 | ||
e065084a | 716 | /* |
d063d709 | 717 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 718 | * |
d063d709 | 719 | * Return lttcomm error code. |
e065084a DG |
720 | */ |
721 | static int send_unix_sock(int sock, void *buf, size_t len) | |
722 | { | |
723 | /* Check valid length */ | |
c617c0c6 | 724 | if (len == 0) { |
e065084a DG |
725 | return -1; |
726 | } | |
727 | ||
728 | return lttcomm_send_unix_sock(sock, buf, len); | |
729 | } | |
730 | ||
5461b305 | 731 | /* |
d063d709 | 732 | * Free memory of a command context structure. |
5461b305 | 733 | */ |
a2fb29a5 | 734 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 735 | { |
a2fb29a5 DG |
736 | DBG("Clean command context structure"); |
737 | if (*cmd_ctx) { | |
738 | if ((*cmd_ctx)->llm) { | |
739 | free((*cmd_ctx)->llm); | |
5461b305 | 740 | } |
a2fb29a5 DG |
741 | if ((*cmd_ctx)->lsm) { |
742 | free((*cmd_ctx)->lsm); | |
5461b305 | 743 | } |
a2fb29a5 DG |
744 | free(*cmd_ctx); |
745 | *cmd_ctx = NULL; | |
5461b305 DG |
746 | } |
747 | } | |
748 | ||
fac6795d | 749 | /* |
0fdd1e2c | 750 | * Notify UST applications using the shm mmap futex. |
fac6795d | 751 | */ |
0fdd1e2c | 752 | static int notify_ust_apps(int active) |
fac6795d | 753 | { |
0fdd1e2c | 754 | char *wait_shm_mmap; |
fac6795d | 755 | |
0fdd1e2c | 756 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 757 | |
0fdd1e2c DG |
758 | /* See shm.c for this call implying mmap, shm and futex calls */ |
759 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
760 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
761 | goto error; |
762 | } | |
763 | ||
0fdd1e2c DG |
764 | /* Wake waiting process */ |
765 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
766 | ||
767 | /* Apps notified successfully */ | |
768 | return 0; | |
fac6795d DG |
769 | |
770 | error: | |
0fdd1e2c | 771 | return -1; |
fac6795d DG |
772 | } |
773 | ||
e065084a | 774 | /* |
d063d709 DG |
775 | * Setup the outgoing data buffer for the response (llm) by allocating the |
776 | * right amount of memory and copying the original information from the lsm | |
777 | * structure. | |
ca95a216 | 778 | * |
d063d709 | 779 | * Return total size of the buffer pointed by buf. |
ca95a216 | 780 | */ |
5461b305 | 781 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 782 | { |
f3ed775e | 783 | int ret, buf_size; |
ca95a216 | 784 | |
f3ed775e | 785 | buf_size = size; |
5461b305 | 786 | |
ba7f0ae5 | 787 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 788 | if (cmd_ctx->llm == NULL) { |
76d7553f | 789 | PERROR("zmalloc"); |
5461b305 | 790 | ret = -ENOMEM; |
ca95a216 DG |
791 | goto error; |
792 | } | |
793 | ||
5461b305 DG |
794 | /* Copy common data */ |
795 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 796 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 797 | |
5461b305 DG |
798 | cmd_ctx->llm->data_size = size; |
799 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
800 | ||
ca95a216 DG |
801 | return buf_size; |
802 | ||
803 | error: | |
804 | return ret; | |
805 | } | |
806 | ||
7a485870 | 807 | /* |
5eb91c98 | 808 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 809 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 810 | */ |
5eb91c98 | 811 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 812 | { |
5eb91c98 | 813 | int ret; |
7a485870 DG |
814 | struct ltt_session *session; |
815 | struct ltt_kernel_channel *channel; | |
816 | ||
5eb91c98 | 817 | DBG("Updating kernel poll set"); |
7a485870 | 818 | |
54d01ffb | 819 | session_lock_list(); |
b5541356 | 820 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 821 | session_lock(session); |
7a485870 | 822 | if (session->kernel_session == NULL) { |
54d01ffb | 823 | session_unlock(session); |
7a485870 DG |
824 | continue; |
825 | } | |
7a485870 | 826 | |
54d01ffb DG |
827 | cds_list_for_each_entry(channel, |
828 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
829 | /* Add channel fd to the kernel poll set */ |
830 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
831 | if (ret < 0) { | |
54d01ffb | 832 | session_unlock(session); |
5eb91c98 DG |
833 | goto error; |
834 | } | |
835 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 836 | } |
54d01ffb | 837 | session_unlock(session); |
7a485870 | 838 | } |
54d01ffb | 839 | session_unlock_list(); |
7a485870 | 840 | |
5eb91c98 | 841 | return 0; |
7a485870 DG |
842 | |
843 | error: | |
54d01ffb | 844 | session_unlock_list(); |
7a485870 DG |
845 | return -1; |
846 | } | |
847 | ||
848 | /* | |
54d01ffb | 849 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 850 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 851 | * |
d063d709 | 852 | * Useful for CPU hotplug feature. |
7a485870 | 853 | */ |
2bdd86d4 | 854 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
855 | { |
856 | int ret = 0; | |
857 | struct ltt_session *session; | |
173af62f | 858 | struct ltt_kernel_session *ksess; |
7a485870 DG |
859 | struct ltt_kernel_channel *channel; |
860 | ||
861 | DBG("Updating kernel streams for channel fd %d", fd); | |
862 | ||
54d01ffb | 863 | session_lock_list(); |
b5541356 | 864 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 865 | session_lock(session); |
7a485870 | 866 | if (session->kernel_session == NULL) { |
54d01ffb | 867 | session_unlock(session); |
7a485870 DG |
868 | continue; |
869 | } | |
173af62f | 870 | ksess = session->kernel_session; |
d9800920 | 871 | |
173af62f | 872 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
873 | if (channel->fd == fd) { |
874 | DBG("Channel found, updating kernel streams"); | |
875 | ret = kernel_open_channel_stream(channel); | |
876 | if (ret < 0) { | |
b3c750d2 | 877 | goto error; |
7a485870 | 878 | } |
5c786ded JD |
879 | /* Update the stream global counter */ |
880 | ksess->stream_count_global += ret; | |
d9800920 | 881 | |
7a485870 | 882 | /* |
5eb91c98 DG |
883 | * Have we already sent fds to the consumer? If yes, it means |
884 | * that tracing is started so it is safe to send our updated | |
885 | * stream fds. | |
7a485870 | 886 | */ |
173af62f DG |
887 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
888 | struct lttng_ht_iter iter; | |
889 | struct consumer_socket *socket; | |
890 | ||
e7fe706f | 891 | rcu_read_lock(); |
173af62f DG |
892 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
893 | &iter.iter, socket, node.node) { | |
173af62f | 894 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 895 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
896 | channel, ksess, |
897 | session->output_traces ? 1 : 0); | |
173af62f DG |
898 | pthread_mutex_unlock(socket->lock); |
899 | if (ret < 0) { | |
e7fe706f | 900 | rcu_read_unlock(); |
173af62f DG |
901 | goto error; |
902 | } | |
7a485870 | 903 | } |
e7fe706f | 904 | rcu_read_unlock(); |
7a485870 | 905 | } |
b3c750d2 | 906 | goto error; |
7a485870 DG |
907 | } |
908 | } | |
54d01ffb | 909 | session_unlock(session); |
7a485870 | 910 | } |
54d01ffb | 911 | session_unlock_list(); |
b3c750d2 | 912 | return ret; |
7a485870 | 913 | |
b3c750d2 | 914 | error: |
54d01ffb DG |
915 | session_unlock(session); |
916 | session_unlock_list(); | |
7a485870 DG |
917 | return ret; |
918 | } | |
919 | ||
487cf67c | 920 | /* |
ffe60014 DG |
921 | * For each tracing session, update newly registered apps. The session list |
922 | * lock MUST be acquired before calling this. | |
487cf67c DG |
923 | */ |
924 | static void update_ust_app(int app_sock) | |
925 | { | |
926 | struct ltt_session *sess, *stmp; | |
927 | ||
fdadac08 DG |
928 | /* Consumer is in an ERROR state. Stop any application update. */ |
929 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
930 | /* Stop the update process since the consumer is dead. */ | |
931 | return; | |
932 | } | |
933 | ||
487cf67c DG |
934 | /* For all tracing session(s) */ |
935 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 936 | session_lock(sess); |
421cb601 DG |
937 | if (sess->ust_session) { |
938 | ust_app_global_update(sess->ust_session, app_sock); | |
939 | } | |
4ee14516 | 940 | session_unlock(sess); |
487cf67c DG |
941 | } |
942 | } | |
943 | ||
7a485870 | 944 | /* |
d063d709 | 945 | * This thread manage event coming from the kernel. |
7a485870 | 946 | * |
d063d709 DG |
947 | * Features supported in this thread: |
948 | * -) CPU Hotplug | |
7a485870 DG |
949 | */ |
950 | static void *thread_manage_kernel(void *data) | |
951 | { | |
139ac872 | 952 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 953 | uint32_t revents, nb_fd; |
7a485870 | 954 | char tmp; |
5eb91c98 | 955 | struct lttng_poll_event events; |
7a485870 | 956 | |
6993eeb3 | 957 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 958 | |
6c71277b | 959 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 960 | |
d5d63bf1 DG |
961 | /* |
962 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 963 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 964 | */ |
6d737ce4 | 965 | lttng_poll_init(&events); |
d5d63bf1 | 966 | |
e547b070 | 967 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
968 | goto error_testpoint; |
969 | } | |
8ac94142 | 970 | |
840cb59c | 971 | health_code_update(); |
44a5e5eb | 972 | |
e547b070 | 973 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 974 | goto error_testpoint; |
6993eeb3 CB |
975 | } |
976 | ||
7a485870 | 977 | while (1) { |
840cb59c | 978 | health_code_update(); |
44a5e5eb | 979 | |
7a485870 | 980 | if (update_poll_flag == 1) { |
d21b0d71 DG |
981 | /* Clean events object. We are about to populate it again. */ |
982 | lttng_poll_clean(&events); | |
983 | ||
d0b96690 | 984 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
985 | if (ret < 0) { |
986 | goto error_poll_create; | |
987 | } | |
988 | ||
989 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
990 | if (ret < 0) { | |
991 | goto error; | |
992 | } | |
5f822d0a | 993 | |
d21b0d71 | 994 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
995 | ret = update_kernel_poll(&events); |
996 | if (ret < 0) { | |
7a485870 DG |
997 | goto error; |
998 | } | |
999 | update_poll_flag = 0; | |
1000 | } | |
1001 | ||
d21b0d71 | 1002 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
1003 | |
1004 | /* Poll infinite value of time */ | |
88f2b785 | 1005 | restart: |
a78af745 | 1006 | health_poll_entry(); |
5eb91c98 | 1007 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1008 | health_poll_exit(); |
7a485870 | 1009 | if (ret < 0) { |
88f2b785 MD |
1010 | /* |
1011 | * Restart interrupted system call. | |
1012 | */ | |
1013 | if (errno == EINTR) { | |
1014 | goto restart; | |
1015 | } | |
7a485870 DG |
1016 | goto error; |
1017 | } else if (ret == 0) { | |
1018 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1019 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1020 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1021 | continue; |
1022 | } | |
1023 | ||
0d9c5d77 DG |
1024 | nb_fd = ret; |
1025 | ||
5eb91c98 DG |
1026 | for (i = 0; i < nb_fd; i++) { |
1027 | /* Fetch once the poll data */ | |
1028 | revents = LTTNG_POLL_GETEV(&events, i); | |
1029 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1030 | |
840cb59c | 1031 | health_code_update(); |
44a5e5eb | 1032 | |
5eb91c98 | 1033 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1034 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1035 | if (ret) { |
139ac872 MD |
1036 | err = 0; |
1037 | goto exit; | |
5eb91c98 | 1038 | } |
7a485870 | 1039 | |
5eb91c98 DG |
1040 | /* Check for data on kernel pipe */ |
1041 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
1042 | (void) lttng_read(kernel_poll_pipe[0], |
1043 | &tmp, 1); | |
f921c78f DG |
1044 | /* |
1045 | * Ret value is useless here, if this pipe gets any actions an | |
1046 | * update is required anyway. | |
1047 | */ | |
5eb91c98 DG |
1048 | update_poll_flag = 1; |
1049 | continue; | |
1050 | } else { | |
1051 | /* | |
1052 | * New CPU detected by the kernel. Adding kernel stream to | |
1053 | * kernel session and updating the kernel consumer | |
1054 | */ | |
1055 | if (revents & LPOLLIN) { | |
2bdd86d4 | 1056 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1057 | if (ret < 0) { |
1058 | continue; | |
1059 | } | |
1060 | break; | |
1061 | /* | |
1062 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
1063 | * and unregister kernel stream at this point. | |
1064 | */ | |
7a485870 | 1065 | } |
7a485870 DG |
1066 | } |
1067 | } | |
1068 | } | |
1069 | ||
139ac872 | 1070 | exit: |
7a485870 | 1071 | error: |
5eb91c98 | 1072 | lttng_poll_clean(&events); |
76d7553f | 1073 | error_poll_create: |
6993eeb3 | 1074 | error_testpoint: |
6620da75 DG |
1075 | utils_close_pipe(kernel_poll_pipe); |
1076 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1077 | if (err) { |
840cb59c | 1078 | health_error(); |
139ac872 | 1079 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1080 | WARN("Kernel thread died unexpectedly. " |
1081 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1082 | } |
8782cc74 | 1083 | health_unregister(health_sessiond); |
76d7553f | 1084 | DBG("Kernel thread dying"); |
7a485870 DG |
1085 | return NULL; |
1086 | } | |
1087 | ||
a23ec3a7 DG |
1088 | /* |
1089 | * Signal pthread condition of the consumer data that the thread. | |
1090 | */ | |
1091 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1092 | { | |
1093 | pthread_mutex_lock(&data->cond_mutex); | |
1094 | ||
1095 | /* | |
1096 | * The state is set before signaling. It can be any value, it's the waiter | |
1097 | * job to correctly interpret this condition variable associated to the | |
1098 | * consumer pthread_cond. | |
1099 | * | |
1100 | * A value of 0 means that the corresponding thread of the consumer data | |
1101 | * was not started. 1 indicates that the thread has started and is ready | |
1102 | * for action. A negative value means that there was an error during the | |
1103 | * thread bootstrap. | |
1104 | */ | |
1105 | data->consumer_thread_is_ready = state; | |
1106 | (void) pthread_cond_signal(&data->cond); | |
1107 | ||
1108 | pthread_mutex_unlock(&data->cond_mutex); | |
1109 | } | |
1110 | ||
1d4b027a | 1111 | /* |
3bd1e081 | 1112 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1113 | */ |
3bd1e081 | 1114 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1115 | { |
659d22db | 1116 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1117 | uint32_t revents, nb_fd; |
1d4b027a | 1118 | enum lttcomm_return_code code; |
5eb91c98 | 1119 | struct lttng_poll_event events; |
3bd1e081 | 1120 | struct consumer_data *consumer_data = data; |
1d4b027a | 1121 | |
3bd1e081 | 1122 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1123 | |
6c71277b | 1124 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1125 | |
855060f8 | 1126 | health_code_update(); |
9449cc75 | 1127 | |
5eb91c98 | 1128 | /* |
331744e3 JD |
1129 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1130 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1131 | */ |
331744e3 | 1132 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1133 | if (ret < 0) { |
76d7553f | 1134 | goto error_poll; |
5eb91c98 | 1135 | } |
273ea72c | 1136 | |
edb8b045 DG |
1137 | /* |
1138 | * The error socket here is already in a listening state which was done | |
1139 | * just before spawning this thread to avoid a race between the consumer | |
1140 | * daemon exec trying to connect and the listen() call. | |
1141 | */ | |
3bd1e081 | 1142 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1143 | if (ret < 0) { |
1144 | goto error; | |
1145 | } | |
1146 | ||
840cb59c | 1147 | health_code_update(); |
44a5e5eb | 1148 | |
331744e3 | 1149 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1150 | restart: |
a78af745 | 1151 | health_poll_entry(); |
8ac94142 | 1152 | |
e547b070 | 1153 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1154 | goto error; |
1155 | } | |
8ac94142 | 1156 | |
5eb91c98 | 1157 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1158 | health_poll_exit(); |
273ea72c | 1159 | if (ret < 0) { |
88f2b785 MD |
1160 | /* |
1161 | * Restart interrupted system call. | |
1162 | */ | |
1163 | if (errno == EINTR) { | |
1164 | goto restart; | |
1165 | } | |
273ea72c DG |
1166 | goto error; |
1167 | } | |
1168 | ||
0d9c5d77 DG |
1169 | nb_fd = ret; |
1170 | ||
5eb91c98 DG |
1171 | for (i = 0; i < nb_fd; i++) { |
1172 | /* Fetch once the poll data */ | |
1173 | revents = LTTNG_POLL_GETEV(&events, i); | |
1174 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1175 | ||
840cb59c | 1176 | health_code_update(); |
44a5e5eb | 1177 | |
5eb91c98 | 1178 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1179 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1180 | if (ret) { |
139ac872 MD |
1181 | err = 0; |
1182 | goto exit; | |
5eb91c98 DG |
1183 | } |
1184 | ||
1185 | /* Event on the registration socket */ | |
3bd1e081 | 1186 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1187 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1188 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1189 | goto error; |
1190 | } | |
1191 | } | |
273ea72c DG |
1192 | } |
1193 | ||
3bd1e081 | 1194 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1195 | if (sock < 0) { |
1196 | goto error; | |
1197 | } | |
1198 | ||
b662582b DG |
1199 | /* |
1200 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1201 | * show must go on. | |
1202 | */ | |
1203 | (void) utils_set_fd_cloexec(sock); | |
1204 | ||
840cb59c | 1205 | health_code_update(); |
44a5e5eb | 1206 | |
3bd1e081 | 1207 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1208 | |
712ea556 | 1209 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1210 | ret = lttcomm_recv_unix_sock(sock, &code, |
1211 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1212 | if (ret <= 0) { |
1213 | goto error; | |
1214 | } | |
1215 | ||
840cb59c | 1216 | health_code_update(); |
f73fabfd | 1217 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1218 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1219 | consumer_data->cmd_sock = |
1220 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1221 | consumer_data->metadata_fd = |
331744e3 | 1222 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1223 | if (consumer_data->cmd_sock < 0 |
1224 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1225 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1226 | /* On error, signal condition and quit. */ |
1227 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1228 | goto error; |
1229 | } | |
9363801e | 1230 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1231 | /* Create metadata socket lock. */ |
1232 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1233 | if (consumer_data->metadata_sock.lock == NULL) { | |
1234 | PERROR("zmalloc pthread mutex"); | |
1235 | ret = -1; | |
1236 | goto error; | |
1237 | } | |
1238 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1239 | ||
a23ec3a7 | 1240 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1241 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1242 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1243 | consumer_data->metadata_fd); |
1d4b027a | 1244 | } else { |
3bd1e081 | 1245 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1246 | lttcomm_get_readable_code(-code)); |
1247 | goto error; | |
1248 | } | |
1249 | ||
331744e3 | 1250 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1251 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1252 | if (ret < 0) { |
72079cae DG |
1253 | goto error; |
1254 | } | |
1255 | ||
331744e3 | 1256 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1257 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1258 | if (ret < 0) { | |
72079cae | 1259 | goto error; |
5eb91c98 DG |
1260 | } |
1261 | ||
331744e3 | 1262 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1263 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1264 | LPOLLIN | LPOLLRDHUP); |
1265 | if (ret < 0) { | |
1266 | goto error; | |
1267 | } | |
1268 | ||
840cb59c | 1269 | health_code_update(); |
44a5e5eb | 1270 | |
331744e3 | 1271 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1272 | restart_poll: |
331744e3 | 1273 | while (1) { |
659d22db DG |
1274 | health_code_update(); |
1275 | ||
1276 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1277 | if (should_quit) { | |
1278 | /* Not a health error. */ | |
1279 | err = 0; | |
1280 | goto exit; | |
1281 | } | |
1282 | ||
331744e3 JD |
1283 | health_poll_entry(); |
1284 | ret = lttng_poll_wait(&events, -1); | |
1285 | health_poll_exit(); | |
1286 | if (ret < 0) { | |
1287 | /* | |
1288 | * Restart interrupted system call. | |
1289 | */ | |
1290 | if (errno == EINTR) { | |
1291 | goto restart_poll; | |
1292 | } | |
1293 | goto error; | |
88f2b785 | 1294 | } |
72079cae | 1295 | |
331744e3 | 1296 | nb_fd = ret; |
0d9c5d77 | 1297 | |
331744e3 JD |
1298 | for (i = 0; i < nb_fd; i++) { |
1299 | /* Fetch once the poll data */ | |
1300 | revents = LTTNG_POLL_GETEV(&events, i); | |
1301 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1302 | |
331744e3 | 1303 | health_code_update(); |
44a5e5eb | 1304 | |
659d22db DG |
1305 | /* |
1306 | * Thread quit pipe has been triggered, flag that we should stop | |
1307 | * but continue the current loop to handle potential data from | |
1308 | * consumer. | |
1309 | */ | |
1310 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1311 | |
331744e3 JD |
1312 | if (pollfd == sock) { |
1313 | /* Event on the consumerd socket */ | |
1314 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1315 | ERR("consumer err socket second poll error"); | |
1316 | goto error; | |
1317 | } | |
1318 | health_code_update(); | |
1319 | /* Wait for any kconsumerd error */ | |
1320 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1321 | sizeof(enum lttcomm_return_code)); | |
1322 | if (ret <= 0) { | |
1323 | ERR("consumer closed the command socket"); | |
1324 | goto error; | |
1325 | } | |
1326 | ||
1327 | ERR("consumer return code : %s", | |
1328 | lttcomm_get_readable_code(-code)); | |
1329 | ||
1330 | goto exit; | |
4ce514c4 | 1331 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1332 | /* UST metadata requests */ |
1333 | ret = ust_consumer_metadata_request( | |
1334 | &consumer_data->metadata_sock); | |
1335 | if (ret < 0) { | |
1336 | ERR("Handling metadata request"); | |
1337 | goto error; | |
1338 | } | |
5eb91c98 | 1339 | } |
659d22db | 1340 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1341 | } |
331744e3 | 1342 | health_code_update(); |
5eb91c98 DG |
1343 | } |
1344 | ||
139ac872 | 1345 | exit: |
1d4b027a | 1346 | error: |
fdadac08 DG |
1347 | /* |
1348 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1349 | * thread might be using them so get exclusive access which will abort all |
1350 | * other consumer command by other threads. | |
fdadac08 DG |
1351 | */ |
1352 | pthread_mutex_lock(&consumer_data->lock); | |
1353 | ||
5c827ce0 DG |
1354 | /* Immediately set the consumerd state to stopped */ |
1355 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1356 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1357 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1358 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1359 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1360 | } else { | |
1361 | /* Code flow error... */ | |
1362 | assert(0); | |
1363 | } | |
1364 | ||
76d7553f MD |
1365 | if (consumer_data->err_sock >= 0) { |
1366 | ret = close(consumer_data->err_sock); | |
1367 | if (ret) { | |
1368 | PERROR("close"); | |
1369 | } | |
a76cbd9f | 1370 | consumer_data->err_sock = -1; |
76d7553f MD |
1371 | } |
1372 | if (consumer_data->cmd_sock >= 0) { | |
1373 | ret = close(consumer_data->cmd_sock); | |
1374 | if (ret) { | |
1375 | PERROR("close"); | |
1376 | } | |
a76cbd9f | 1377 | consumer_data->cmd_sock = -1; |
76d7553f | 1378 | } |
96544455 SS |
1379 | if (consumer_data->metadata_sock.fd_ptr && |
1380 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1381 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1382 | if (ret) { |
1383 | PERROR("close"); | |
1384 | } | |
1385 | } | |
76d7553f MD |
1386 | if (sock >= 0) { |
1387 | ret = close(sock); | |
1388 | if (ret) { | |
1389 | PERROR("close"); | |
1390 | } | |
1391 | } | |
273ea72c | 1392 | |
3bd1e081 MD |
1393 | unlink(consumer_data->err_unix_sock_path); |
1394 | unlink(consumer_data->cmd_unix_sock_path); | |
1395 | consumer_data->pid = 0; | |
fdadac08 | 1396 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1397 | |
fdadac08 | 1398 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1399 | if (consumer_data->metadata_sock.lock) { |
1400 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1401 | free(consumer_data->metadata_sock.lock); | |
1402 | } | |
5eb91c98 | 1403 | lttng_poll_clean(&events); |
76d7553f | 1404 | error_poll: |
139ac872 | 1405 | if (err) { |
840cb59c | 1406 | health_error(); |
139ac872 MD |
1407 | ERR("Health error occurred in %s", __func__); |
1408 | } | |
8782cc74 | 1409 | health_unregister(health_sessiond); |
76d7553f | 1410 | DBG("consumer thread cleanup completed"); |
0177d773 | 1411 | |
5eb91c98 | 1412 | return NULL; |
099e26bd DG |
1413 | } |
1414 | ||
099e26bd DG |
1415 | /* |
1416 | * This thread manage application communication. | |
1d4b027a DG |
1417 | */ |
1418 | static void *thread_manage_apps(void *data) | |
099e26bd | 1419 | { |
139ac872 | 1420 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1421 | ssize_t size_ret; |
5eb91c98 | 1422 | uint32_t revents, nb_fd; |
5eb91c98 | 1423 | struct lttng_poll_event events; |
099e26bd DG |
1424 | |
1425 | DBG("[thread] Manage application started"); | |
1426 | ||
f6a9efaa DG |
1427 | rcu_register_thread(); |
1428 | rcu_thread_online(); | |
1429 | ||
6c71277b | 1430 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1431 | |
e547b070 | 1432 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1433 | goto error_testpoint; |
1434 | } | |
1435 | ||
840cb59c | 1436 | health_code_update(); |
44a5e5eb | 1437 | |
d0b96690 | 1438 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1439 | if (ret < 0) { |
76d7553f | 1440 | goto error_poll_create; |
5eb91c98 | 1441 | } |
099e26bd | 1442 | |
5eb91c98 DG |
1443 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1444 | if (ret < 0) { | |
1445 | goto error; | |
1446 | } | |
099e26bd | 1447 | |
e547b070 | 1448 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1449 | goto error; |
1450 | } | |
8ac94142 | 1451 | |
840cb59c | 1452 | health_code_update(); |
44a5e5eb | 1453 | |
5eb91c98 | 1454 | while (1) { |
d21b0d71 | 1455 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1456 | |
1457 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1458 | restart: |
a78af745 | 1459 | health_poll_entry(); |
5eb91c98 | 1460 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1461 | health_poll_exit(); |
099e26bd | 1462 | if (ret < 0) { |
88f2b785 MD |
1463 | /* |
1464 | * Restart interrupted system call. | |
1465 | */ | |
1466 | if (errno == EINTR) { | |
1467 | goto restart; | |
1468 | } | |
099e26bd DG |
1469 | goto error; |
1470 | } | |
1471 | ||
0d9c5d77 DG |
1472 | nb_fd = ret; |
1473 | ||
5eb91c98 DG |
1474 | for (i = 0; i < nb_fd; i++) { |
1475 | /* Fetch once the poll data */ | |
1476 | revents = LTTNG_POLL_GETEV(&events, i); | |
1477 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1478 | ||
840cb59c | 1479 | health_code_update(); |
44a5e5eb | 1480 | |
5eb91c98 | 1481 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1482 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1483 | if (ret) { |
139ac872 MD |
1484 | err = 0; |
1485 | goto exit; | |
5eb91c98 | 1486 | } |
099e26bd | 1487 | |
5eb91c98 DG |
1488 | /* Inspect the apps cmd pipe */ |
1489 | if (pollfd == apps_cmd_pipe[0]) { | |
1490 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1491 | ERR("Apps command pipe error"); | |
0177d773 | 1492 | goto error; |
5eb91c98 | 1493 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1494 | int sock; |
1495 | ||
5eb91c98 | 1496 | /* Empty pipe */ |
6cd525e8 MD |
1497 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1498 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1499 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1500 | goto error; |
1501 | } | |
099e26bd | 1502 | |
840cb59c | 1503 | health_code_update(); |
44a5e5eb | 1504 | |
ffe60014 | 1505 | /* |
d0b96690 DG |
1506 | * We only monitor the error events of the socket. This |
1507 | * thread does not handle any incoming data from UST | |
1508 | * (POLLIN). | |
ffe60014 | 1509 | */ |
d0b96690 DG |
1510 | ret = lttng_poll_add(&events, sock, |
1511 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1512 | if (ret < 0) { | |
5eb91c98 | 1513 | goto error; |
e0c7ec2b | 1514 | } |
acc7b41b | 1515 | |
d0b96690 | 1516 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1517 | } |
5eb91c98 DG |
1518 | } else { |
1519 | /* | |
54d01ffb DG |
1520 | * At this point, we know that a registered application made |
1521 | * the event at poll_wait. | |
5eb91c98 DG |
1522 | */ |
1523 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1524 | /* Removing from the poll set */ | |
1525 | ret = lttng_poll_del(&events, pollfd); | |
1526 | if (ret < 0) { | |
1527 | goto error; | |
1528 | } | |
099e26bd | 1529 | |
b9d9b220 | 1530 | /* Socket closed on remote end. */ |
56fff090 | 1531 | ust_app_unregister(pollfd); |
5eb91c98 | 1532 | } |
099e26bd | 1533 | } |
44a5e5eb | 1534 | |
840cb59c | 1535 | health_code_update(); |
099e26bd | 1536 | } |
099e26bd DG |
1537 | } |
1538 | ||
139ac872 | 1539 | exit: |
099e26bd | 1540 | error: |
5eb91c98 | 1541 | lttng_poll_clean(&events); |
76d7553f | 1542 | error_poll_create: |
6993eeb3 | 1543 | error_testpoint: |
6620da75 DG |
1544 | utils_close_pipe(apps_cmd_pipe); |
1545 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1546 | ||
1547 | /* | |
1548 | * We don't clean the UST app hash table here since already registered | |
1549 | * applications can still be controlled so let them be until the session | |
1550 | * daemon dies or the applications stop. | |
1551 | */ | |
1552 | ||
139ac872 | 1553 | if (err) { |
840cb59c | 1554 | health_error(); |
139ac872 MD |
1555 | ERR("Health error occurred in %s", __func__); |
1556 | } | |
8782cc74 | 1557 | health_unregister(health_sessiond); |
76d7553f | 1558 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1559 | rcu_thread_offline(); |
1560 | rcu_unregister_thread(); | |
099e26bd DG |
1561 | return NULL; |
1562 | } | |
1563 | ||
d0b96690 | 1564 | /* |
d88aee68 DG |
1565 | * Send a socket to a thread This is called from the dispatch UST registration |
1566 | * thread once all sockets are set for the application. | |
d0b96690 | 1567 | * |
b85dc84c DG |
1568 | * The sock value can be invalid, we don't really care, the thread will handle |
1569 | * it and make the necessary cleanup if so. | |
1570 | * | |
d0b96690 DG |
1571 | * On success, return 0 else a negative value being the errno message of the |
1572 | * write(). | |
1573 | */ | |
d88aee68 | 1574 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1575 | { |
6cd525e8 | 1576 | ssize_t ret; |
d0b96690 | 1577 | |
b85dc84c DG |
1578 | /* |
1579 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1580 | * before calling this function being a shutdown state of the thread. | |
1581 | */ | |
1582 | if (fd < 0) { | |
1583 | ret = -EBADF; | |
1584 | goto error; | |
1585 | } | |
d0b96690 | 1586 | |
6cd525e8 MD |
1587 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1588 | if (ret < sizeof(sock)) { | |
d88aee68 | 1589 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1590 | if (ret < 0) { |
1591 | ret = -errno; | |
1592 | } | |
1593 | goto error; | |
1594 | } | |
1595 | ||
1596 | /* All good. Don't send back the write positive ret value. */ | |
1597 | ret = 0; | |
1598 | error: | |
6cd525e8 | 1599 | return (int) ret; |
d0b96690 DG |
1600 | } |
1601 | ||
f45e313d DG |
1602 | /* |
1603 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1604 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1605 | * notify socket is never received. | |
1606 | */ | |
1607 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1608 | { | |
1609 | int ret, nb_fd = 0, i; | |
1610 | unsigned int fd_added = 0; | |
1611 | struct lttng_poll_event events; | |
1612 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1613 | ||
1614 | assert(wait_queue); | |
1615 | ||
1616 | lttng_poll_init(&events); | |
1617 | ||
1618 | /* Just skip everything for an empty queue. */ | |
1619 | if (!wait_queue->count) { | |
1620 | goto end; | |
1621 | } | |
1622 | ||
1623 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1624 | if (ret < 0) { | |
1625 | goto error_create; | |
1626 | } | |
1627 | ||
1628 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1629 | &wait_queue->head, head) { | |
1630 | assert(wait_node->app); | |
1631 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1632 | LPOLLHUP | LPOLLERR); | |
1633 | if (ret < 0) { | |
1634 | goto error; | |
1635 | } | |
1636 | ||
1637 | fd_added = 1; | |
1638 | } | |
1639 | ||
1640 | if (!fd_added) { | |
1641 | goto end; | |
1642 | } | |
1643 | ||
1644 | /* | |
1645 | * Poll but don't block so we can quickly identify the faulty events and | |
1646 | * clean them afterwards from the wait queue. | |
1647 | */ | |
1648 | ret = lttng_poll_wait(&events, 0); | |
1649 | if (ret < 0) { | |
1650 | goto error; | |
1651 | } | |
1652 | nb_fd = ret; | |
1653 | ||
1654 | for (i = 0; i < nb_fd; i++) { | |
1655 | /* Get faulty FD. */ | |
1656 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1657 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1658 | ||
1659 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1660 | &wait_queue->head, head) { | |
1661 | if (pollfd == wait_node->app->sock && | |
1662 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1663 | cds_list_del(&wait_node->head); | |
1664 | wait_queue->count--; | |
1665 | ust_app_destroy(wait_node->app); | |
1666 | free(wait_node); | |
1667 | break; | |
1668 | } | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | if (nb_fd > 0) { | |
1673 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1674 | } | |
1675 | ||
1676 | end: | |
1677 | lttng_poll_clean(&events); | |
1678 | return; | |
1679 | ||
1680 | error: | |
1681 | lttng_poll_clean(&events); | |
1682 | error_create: | |
1683 | ERR("Unable to sanitize wait queue"); | |
1684 | return; | |
1685 | } | |
1686 | ||
099e26bd DG |
1687 | /* |
1688 | * Dispatch request from the registration threads to the application | |
1689 | * communication thread. | |
1690 | */ | |
1691 | static void *thread_dispatch_ust_registration(void *data) | |
1692 | { | |
12e2b881 | 1693 | int ret, err = -1; |
099e26bd DG |
1694 | struct cds_wfq_node *node; |
1695 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1696 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1697 | struct ust_reg_wait_queue wait_queue = { | |
1698 | .count = 0, | |
1699 | }; | |
d0b96690 | 1700 | |
6c71277b | 1701 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1702 | |
9ad42ec1 MD |
1703 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1704 | goto error_testpoint; | |
1705 | } | |
1706 | ||
12e2b881 MD |
1707 | health_code_update(); |
1708 | ||
f45e313d | 1709 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1710 | |
1711 | DBG("[thread] Dispatch UST command started"); | |
1712 | ||
26c9d55e | 1713 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1714 | health_code_update(); |
1715 | ||
099e26bd DG |
1716 | /* Atomically prepare the queue futex */ |
1717 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1718 | ||
1719 | do { | |
d0b96690 | 1720 | struct ust_app *app = NULL; |
7972aab2 | 1721 | ust_cmd = NULL; |
d0b96690 | 1722 | |
f45e313d DG |
1723 | /* |
1724 | * Make sure we don't have node(s) that have hung up before receiving | |
1725 | * the notify socket. This is to clean the list in order to avoid | |
1726 | * memory leaks from notify socket that are never seen. | |
1727 | */ | |
1728 | sanitize_wait_queue(&wait_queue); | |
1729 | ||
12e2b881 | 1730 | health_code_update(); |
099e26bd DG |
1731 | /* Dequeue command for registration */ |
1732 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1733 | if (node == NULL) { | |
00a17c97 | 1734 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1735 | /* Continue thread execution */ |
1736 | break; | |
1737 | } | |
1738 | ||
1739 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1740 | ||
2f50c8a3 DG |
1741 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1742 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1743 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1744 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1745 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1746 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1747 | |
1748 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1749 | wait_node = zmalloc(sizeof(*wait_node)); | |
1750 | if (!wait_node) { | |
1751 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1752 | ret = close(ust_cmd->sock); |
1753 | if (ret < 0) { | |
1754 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1755 | } | |
51dec90d | 1756 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1757 | free(ust_cmd); |
d0b96690 DG |
1758 | goto error; |
1759 | } | |
1760 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1761 | ||
1762 | /* Create application object if socket is CMD. */ | |
1763 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1764 | ust_cmd->sock); | |
1765 | if (!wait_node->app) { | |
1766 | ret = close(ust_cmd->sock); | |
1767 | if (ret < 0) { | |
1768 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1769 | } |
51dec90d | 1770 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1771 | free(wait_node); |
7972aab2 | 1772 | free(ust_cmd); |
d0b96690 DG |
1773 | continue; |
1774 | } | |
1775 | /* | |
1776 | * Add application to the wait queue so we can set the notify | |
1777 | * socket before putting this object in the global ht. | |
1778 | */ | |
f45e313d DG |
1779 | cds_list_add(&wait_node->head, &wait_queue.head); |
1780 | wait_queue.count++; | |
d0b96690 | 1781 | |
7972aab2 | 1782 | free(ust_cmd); |
d0b96690 DG |
1783 | /* |
1784 | * We have to continue here since we don't have the notify | |
1785 | * socket and the application MUST be added to the hash table | |
1786 | * only at that moment. | |
1787 | */ | |
1788 | continue; | |
1789 | } else { | |
1790 | /* | |
1791 | * Look for the application in the local wait queue and set the | |
1792 | * notify socket if found. | |
1793 | */ | |
d88aee68 | 1794 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1795 | &wait_queue.head, head) { |
12e2b881 | 1796 | health_code_update(); |
d0b96690 DG |
1797 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1798 | wait_node->app->notify_sock = ust_cmd->sock; | |
1799 | cds_list_del(&wait_node->head); | |
f45e313d | 1800 | wait_queue.count--; |
d0b96690 DG |
1801 | app = wait_node->app; |
1802 | free(wait_node); | |
1803 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1804 | break; | |
1805 | } | |
1806 | } | |
020d7f60 DG |
1807 | |
1808 | /* | |
1809 | * With no application at this stage the received socket is | |
1810 | * basically useless so close it before we free the cmd data | |
1811 | * structure for good. | |
1812 | */ | |
1813 | if (!app) { | |
1814 | ret = close(ust_cmd->sock); | |
1815 | if (ret < 0) { | |
1816 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1817 | } | |
51dec90d | 1818 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1819 | } |
7972aab2 | 1820 | free(ust_cmd); |
d0b96690 DG |
1821 | } |
1822 | ||
1823 | if (app) { | |
d0b96690 DG |
1824 | /* |
1825 | * @session_lock_list | |
1826 | * | |
1827 | * Lock the global session list so from the register up to the | |
1828 | * registration done message, no thread can see the application | |
1829 | * and change its state. | |
1830 | */ | |
1831 | session_lock_list(); | |
1832 | rcu_read_lock(); | |
d88aee68 | 1833 | |
d0b96690 DG |
1834 | /* |
1835 | * Add application to the global hash table. This needs to be | |
1836 | * done before the update to the UST registry can locate the | |
1837 | * application. | |
1838 | */ | |
1839 | ust_app_add(app); | |
d88aee68 DG |
1840 | |
1841 | /* Set app version. This call will print an error if needed. */ | |
1842 | (void) ust_app_version(app); | |
1843 | ||
1844 | /* Send notify socket through the notify pipe. */ | |
1845 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1846 | app->notify_sock); | |
1847 | if (ret < 0) { | |
1848 | rcu_read_unlock(); | |
1849 | session_unlock_list(); | |
b85dc84c DG |
1850 | /* |
1851 | * No notify thread, stop the UST tracing. However, this is | |
1852 | * not an internal error of the this thread thus setting | |
1853 | * the health error code to a normal exit. | |
1854 | */ | |
1855 | err = 0; | |
d88aee68 | 1856 | goto error; |
6620da75 | 1857 | } |
d88aee68 | 1858 | |
d0b96690 DG |
1859 | /* |
1860 | * Update newly registered application with the tracing | |
1861 | * registry info already enabled information. | |
1862 | */ | |
1863 | update_ust_app(app->sock); | |
d88aee68 DG |
1864 | |
1865 | /* | |
1866 | * Don't care about return value. Let the manage apps threads | |
1867 | * handle app unregistration upon socket close. | |
1868 | */ | |
1869 | (void) ust_app_register_done(app->sock); | |
1870 | ||
1871 | /* | |
1872 | * Even if the application socket has been closed, send the app | |
1873 | * to the thread and unregistration will take place at that | |
1874 | * place. | |
1875 | */ | |
1876 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1877 | if (ret < 0) { |
d88aee68 DG |
1878 | rcu_read_unlock(); |
1879 | session_unlock_list(); | |
b85dc84c DG |
1880 | /* |
1881 | * No apps. thread, stop the UST tracing. However, this is | |
1882 | * not an internal error of the this thread thus setting | |
1883 | * the health error code to a normal exit. | |
1884 | */ | |
1885 | err = 0; | |
d88aee68 | 1886 | goto error; |
d0b96690 | 1887 | } |
d88aee68 | 1888 | |
d0b96690 DG |
1889 | rcu_read_unlock(); |
1890 | session_unlock_list(); | |
099e26bd | 1891 | } |
099e26bd DG |
1892 | } while (node != NULL); |
1893 | ||
12e2b881 | 1894 | health_poll_entry(); |
099e26bd DG |
1895 | /* Futex wait on queue. Blocking call on futex() */ |
1896 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1897 | health_poll_exit(); |
099e26bd | 1898 | } |
12e2b881 MD |
1899 | /* Normal exit, no error */ |
1900 | err = 0; | |
099e26bd DG |
1901 | |
1902 | error: | |
d88aee68 DG |
1903 | /* Clean up wait queue. */ |
1904 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1905 | &wait_queue.head, head) { |
d88aee68 | 1906 | cds_list_del(&wait_node->head); |
f45e313d | 1907 | wait_queue.count--; |
d88aee68 DG |
1908 | free(wait_node); |
1909 | } | |
1910 | ||
9ad42ec1 | 1911 | error_testpoint: |
099e26bd | 1912 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1913 | if (err) { |
1914 | health_error(); | |
1915 | ERR("Health error occurred in %s", __func__); | |
1916 | } | |
8782cc74 | 1917 | health_unregister(health_sessiond); |
099e26bd DG |
1918 | return NULL; |
1919 | } | |
1920 | ||
1921 | /* | |
1922 | * This thread manage application registration. | |
1923 | */ | |
1924 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1925 | { |
139ac872 | 1926 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1927 | uint32_t revents, nb_fd; |
1928 | struct lttng_poll_event events; | |
099e26bd DG |
1929 | /* |
1930 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1931 | * freed in the manage apps thread. | |
1932 | */ | |
1933 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1934 | |
099e26bd | 1935 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1936 | |
6c71277b | 1937 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1938 | |
e547b070 | 1939 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
1940 | goto error_testpoint; |
1941 | } | |
8ac94142 | 1942 | |
1d4b027a DG |
1943 | ret = lttcomm_listen_unix_sock(apps_sock); |
1944 | if (ret < 0) { | |
76d7553f | 1945 | goto error_listen; |
1d4b027a DG |
1946 | } |
1947 | ||
5eb91c98 DG |
1948 | /* |
1949 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1950 | * more will be added to this poll set. | |
1951 | */ | |
d0b96690 | 1952 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1953 | if (ret < 0) { |
76d7553f | 1954 | goto error_create_poll; |
5eb91c98 | 1955 | } |
273ea72c | 1956 | |
5eb91c98 DG |
1957 | /* Add the application registration socket */ |
1958 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1959 | if (ret < 0) { | |
76d7553f | 1960 | goto error_poll_add; |
5eb91c98 | 1961 | } |
273ea72c | 1962 | |
1d4b027a | 1963 | /* Notify all applications to register */ |
0fdd1e2c DG |
1964 | ret = notify_ust_apps(1); |
1965 | if (ret < 0) { | |
1966 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1967 | "Execution continues but there might be problem for already\n" |
1968 | "running applications that wishes to register."); | |
0fdd1e2c | 1969 | } |
1d4b027a DG |
1970 | |
1971 | while (1) { | |
1972 | DBG("Accepting application registration"); | |
273ea72c DG |
1973 | |
1974 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1975 | restart: |
a78af745 | 1976 | health_poll_entry(); |
5eb91c98 | 1977 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1978 | health_poll_exit(); |
273ea72c | 1979 | if (ret < 0) { |
88f2b785 MD |
1980 | /* |
1981 | * Restart interrupted system call. | |
1982 | */ | |
1983 | if (errno == EINTR) { | |
1984 | goto restart; | |
1985 | } | |
273ea72c DG |
1986 | goto error; |
1987 | } | |
1988 | ||
0d9c5d77 DG |
1989 | nb_fd = ret; |
1990 | ||
5eb91c98 | 1991 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1992 | health_code_update(); |
139ac872 | 1993 | |
5eb91c98 DG |
1994 | /* Fetch once the poll data */ |
1995 | revents = LTTNG_POLL_GETEV(&events, i); | |
1996 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1997 | |
5eb91c98 | 1998 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1999 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2000 | if (ret) { |
139ac872 MD |
2001 | err = 0; |
2002 | goto exit; | |
90014c57 | 2003 | } |
1d4b027a | 2004 | |
5eb91c98 DG |
2005 | /* Event on the registration socket */ |
2006 | if (pollfd == apps_sock) { | |
2007 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2008 | ERR("Register apps socket poll error"); | |
2009 | goto error; | |
2010 | } else if (revents & LPOLLIN) { | |
2011 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2012 | if (sock < 0) { | |
2013 | goto error; | |
2014 | } | |
099e26bd | 2015 | |
16c5c8fa DG |
2016 | /* |
2017 | * Set socket timeout for both receiving and ending. | |
2018 | * app_socket_timeout is in seconds, whereas | |
2019 | * lttcomm_setsockopt_rcv_timeout and | |
2020 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2021 | * parameter. | |
2022 | */ | |
2023 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2024 | app_socket_timeout * 1000); | |
2025 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2026 | app_socket_timeout * 1000); | |
2027 | ||
b662582b DG |
2028 | /* |
2029 | * Set the CLOEXEC flag. Return code is useless because | |
2030 | * either way, the show must go on. | |
2031 | */ | |
2032 | (void) utils_set_fd_cloexec(sock); | |
2033 | ||
5eb91c98 | 2034 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2035 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2036 | if (ust_cmd == NULL) { |
76d7553f | 2037 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
2038 | goto error; |
2039 | } | |
1d4b027a | 2040 | |
5eb91c98 DG |
2041 | /* |
2042 | * Using message-based transmissions to ensure we don't | |
2043 | * have to deal with partially received messages. | |
2044 | */ | |
4063050c MD |
2045 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2046 | if (ret < 0) { | |
2047 | ERR("Exhausted file descriptors allowed for applications."); | |
2048 | free(ust_cmd); | |
2049 | ret = close(sock); | |
2050 | if (ret) { | |
2051 | PERROR("close"); | |
2052 | } | |
2053 | sock = -1; | |
2054 | continue; | |
2055 | } | |
d88aee68 | 2056 | |
840cb59c | 2057 | health_code_update(); |
d0b96690 DG |
2058 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2059 | if (ret < 0) { | |
5eb91c98 | 2060 | free(ust_cmd); |
d0b96690 | 2061 | /* Close socket of the application. */ |
76d7553f MD |
2062 | ret = close(sock); |
2063 | if (ret) { | |
2064 | PERROR("close"); | |
2065 | } | |
4063050c | 2066 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2067 | sock = -1; |
5eb91c98 DG |
2068 | continue; |
2069 | } | |
840cb59c | 2070 | health_code_update(); |
099e26bd | 2071 | |
5eb91c98 | 2072 | ust_cmd->sock = sock; |
34a2494f | 2073 | sock = -1; |
099e26bd | 2074 | |
5eb91c98 DG |
2075 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2076 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2077 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2078 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2079 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2080 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2081 | |
5eb91c98 DG |
2082 | /* |
2083 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2084 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
2085 | */ |
2086 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
2087 | ||
2088 | /* | |
2089 | * Wake the registration queue futex. Implicit memory | |
2090 | * barrier with the exchange in cds_wfq_enqueue. | |
2091 | */ | |
2092 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2093 | } | |
2094 | } | |
90014c57 | 2095 | } |
1d4b027a DG |
2096 | } |
2097 | ||
139ac872 | 2098 | exit: |
1d4b027a | 2099 | error: |
0fdd1e2c DG |
2100 | /* Notify that the registration thread is gone */ |
2101 | notify_ust_apps(0); | |
2102 | ||
a4b35e07 | 2103 | if (apps_sock >= 0) { |
76d7553f MD |
2104 | ret = close(apps_sock); |
2105 | if (ret) { | |
2106 | PERROR("close"); | |
2107 | } | |
a4b35e07 | 2108 | } |
46c3f085 | 2109 | if (sock >= 0) { |
76d7553f MD |
2110 | ret = close(sock); |
2111 | if (ret) { | |
2112 | PERROR("close"); | |
2113 | } | |
4063050c | 2114 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2115 | } |
273ea72c | 2116 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2117 | |
76d7553f | 2118 | error_poll_add: |
5eb91c98 | 2119 | lttng_poll_clean(&events); |
76d7553f MD |
2120 | error_listen: |
2121 | error_create_poll: | |
6993eeb3 | 2122 | error_testpoint: |
76d7553f | 2123 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2124 | if (err) { |
2125 | health_error(); | |
2126 | ERR("Health error occurred in %s", __func__); | |
2127 | } | |
8782cc74 | 2128 | health_unregister(health_sessiond); |
5eb91c98 | 2129 | |
1d4b027a DG |
2130 | return NULL; |
2131 | } | |
2132 | ||
8c0faa1d | 2133 | /* |
3bd1e081 | 2134 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2135 | * exec or it will fails. |
8c0faa1d | 2136 | */ |
3bd1e081 | 2137 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2138 | { |
a23ec3a7 | 2139 | int ret, clock_ret; |
ee0b0061 DG |
2140 | struct timespec timeout; |
2141 | ||
a23ec3a7 DG |
2142 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2143 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2144 | |
a23ec3a7 DG |
2145 | /* Setup pthread condition */ |
2146 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2147 | if (ret != 0) { | |
2148 | errno = ret; | |
2149 | PERROR("pthread_condattr_init consumer data"); | |
2150 | goto error; | |
2151 | } | |
2152 | ||
2153 | /* | |
2154 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2155 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2156 | * for a more details and how we noticed it. | |
2157 | */ | |
2158 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2159 | if (ret != 0) { | |
2160 | errno = ret; | |
2161 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2162 | goto error; |
2163 | } | |
8c0faa1d | 2164 | |
a23ec3a7 DG |
2165 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2166 | if (ret != 0) { | |
2167 | errno = ret; | |
2168 | PERROR("pthread_cond_init consumer data"); | |
2169 | goto error; | |
2170 | } | |
2171 | ||
2172 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2173 | consumer_data); | |
8c0faa1d | 2174 | if (ret != 0) { |
3bd1e081 | 2175 | PERROR("pthread_create consumer"); |
ee0b0061 | 2176 | ret = -1; |
8c0faa1d DG |
2177 | goto error; |
2178 | } | |
2179 | ||
a23ec3a7 DG |
2180 | /* We are about to wait on a pthread condition */ |
2181 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2182 | ||
ee0b0061 | 2183 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2184 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2185 | /* | |
2186 | * Set the timeout for the condition timed wait even if the clock gettime | |
2187 | * call fails since we might loop on that call and we want to avoid to | |
2188 | * increment the timeout too many times. | |
2189 | */ | |
2190 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2191 | ||
2192 | /* | |
2193 | * The following loop COULD be skipped in some conditions so this is why we | |
2194 | * set ret to 0 in order to make sure at least one round of the loop is | |
2195 | * done. | |
2196 | */ | |
2197 | ret = 0; | |
2198 | ||
2199 | /* | |
2200 | * Loop until the condition is reached or when a timeout is reached. Note | |
2201 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2202 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2203 | * possible. This loop does not take any chances and works with both of | |
2204 | * them. | |
2205 | */ | |
2206 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2207 | if (clock_ret < 0) { | |
2208 | PERROR("clock_gettime spawn consumer"); | |
2209 | /* Infinite wait for the consumerd thread to be ready */ | |
2210 | ret = pthread_cond_wait(&consumer_data->cond, | |
2211 | &consumer_data->cond_mutex); | |
2212 | } else { | |
2213 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2214 | &consumer_data->cond_mutex, &timeout); | |
2215 | } | |
ee0b0061 | 2216 | } |
8c0faa1d | 2217 | |
a23ec3a7 DG |
2218 | /* Release the pthread condition */ |
2219 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2220 | ||
2221 | if (ret != 0) { | |
2222 | errno = ret; | |
2223 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2224 | int pth_ret; |
2225 | ||
ee0b0061 DG |
2226 | /* |
2227 | * Call has timed out so we kill the kconsumerd_thread and return | |
2228 | * an error. | |
2229 | */ | |
a23ec3a7 DG |
2230 | ERR("Condition timed out. The consumer thread was never ready." |
2231 | " Killing it"); | |
4282f9a3 DG |
2232 | pth_ret = pthread_cancel(consumer_data->thread); |
2233 | if (pth_ret < 0) { | |
3bd1e081 | 2234 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2235 | } |
2236 | } else { | |
a23ec3a7 | 2237 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2238 | } |
4282f9a3 DG |
2239 | /* Caller is expecting a negative value on failure. */ |
2240 | ret = -1; | |
ee0b0061 DG |
2241 | goto error; |
2242 | } | |
2243 | ||
3bd1e081 MD |
2244 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2245 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2246 | ERR("Consumerd did not start"); |
3bd1e081 | 2247 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2248 | goto error; |
2249 | } | |
3bd1e081 | 2250 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2251 | |
8c0faa1d DG |
2252 | return 0; |
2253 | ||
2254 | error: | |
2255 | return ret; | |
2256 | } | |
2257 | ||
d9800920 | 2258 | /* |
3bd1e081 | 2259 | * Join consumer thread |
d9800920 | 2260 | */ |
3bd1e081 | 2261 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2262 | { |
2263 | void *status; | |
cf3af59e | 2264 | |
e8209f6b DG |
2265 | /* Consumer pid must be a real one. */ |
2266 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2267 | int ret; |
3bd1e081 | 2268 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2269 | if (ret) { |
3bd1e081 | 2270 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2271 | return ret; |
2272 | } | |
3bd1e081 | 2273 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2274 | } else { |
2275 | return 0; | |
2276 | } | |
2277 | } | |
2278 | ||
8c0faa1d | 2279 | /* |
3bd1e081 | 2280 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2281 | * |
d063d709 | 2282 | * Return pid if successful else -1. |
8c0faa1d | 2283 | */ |
3bd1e081 | 2284 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2285 | { |
2286 | int ret; | |
2287 | pid_t pid; | |
94c55f17 | 2288 | const char *consumer_to_use; |
53086306 | 2289 | const char *verbosity; |
94c55f17 | 2290 | struct stat st; |
8c0faa1d | 2291 | |
3bd1e081 | 2292 | DBG("Spawning consumerd"); |
c49dc785 | 2293 | |
8c0faa1d DG |
2294 | pid = fork(); |
2295 | if (pid == 0) { | |
2296 | /* | |
3bd1e081 | 2297 | * Exec consumerd. |
8c0faa1d | 2298 | */ |
daee5345 | 2299 | if (opt_verbose_consumer) { |
53086306 | 2300 | verbosity = "--verbose"; |
4421f712 | 2301 | } else if (lttng_opt_quiet) { |
53086306 | 2302 | verbosity = "--quiet"; |
4421f712 DG |
2303 | } else { |
2304 | verbosity = ""; | |
53086306 | 2305 | } |
4421f712 | 2306 | |
3bd1e081 MD |
2307 | switch (consumer_data->type) { |
2308 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2309 | /* |
c7704d57 DG |
2310 | * Find out which consumerd to execute. We will first try the |
2311 | * 64-bit path, then the sessiond's installation directory, and | |
2312 | * fallback on the 32-bit one, | |
94c55f17 | 2313 | */ |
63a799e8 AM |
2314 | DBG3("Looking for a kernel consumer at these locations:"); |
2315 | DBG3(" 1) %s", consumerd64_bin); | |
2316 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2317 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2318 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2319 | DBG3("Found location #1"); |
94c55f17 | 2320 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2321 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2322 | DBG3("Found location #2"); |
94c55f17 | 2323 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2324 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2325 | DBG3("Found location #3"); |
eb1e0bd4 | 2326 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2327 | } else { |
63a799e8 | 2328 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2329 | ret = -EINVAL; |
94c55f17 AM |
2330 | break; |
2331 | } | |
2332 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2333 | ret = execl(consumer_to_use, |
94c55f17 AM |
2334 | "lttng-consumerd", verbosity, "-k", |
2335 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2336 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2337 | "--group", tracing_group_name, |
94c55f17 | 2338 | NULL); |
3bd1e081 | 2339 | break; |
7753dea8 MD |
2340 | case LTTNG_CONSUMER64_UST: |
2341 | { | |
b1e0b6b6 | 2342 | char *tmpnew = NULL; |
8f4905da MD |
2343 | |
2344 | if (consumerd64_libdir[0] != '\0') { | |
2345 | char *tmp; | |
2346 | size_t tmplen; | |
2347 | ||
2348 | tmp = getenv("LD_LIBRARY_PATH"); | |
2349 | if (!tmp) { | |
2350 | tmp = ""; | |
2351 | } | |
2352 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2353 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2354 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2355 | if (!tmpnew) { | |
2356 | ret = -ENOMEM; | |
2357 | goto error; | |
2358 | } | |
2359 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2360 | strcat(tmpnew, consumerd64_libdir); | |
2361 | if (tmp[0] != '\0') { | |
2362 | strcat(tmpnew, ":"); | |
2363 | strcat(tmpnew, tmp); | |
2364 | } | |
2365 | ret = putenv(tmpnew); | |
2366 | if (ret) { | |
2367 | ret = -errno; | |
c6f76da9 | 2368 | free(tmpnew); |
8f4905da MD |
2369 | goto error; |
2370 | } | |
2371 | } | |
94c55f17 | 2372 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2373 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2374 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2375 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2376 | "--group", tracing_group_name, |
7753dea8 | 2377 | NULL); |
8f4905da MD |
2378 | if (consumerd64_libdir[0] != '\0') { |
2379 | free(tmpnew); | |
2380 | } | |
3bd1e081 | 2381 | break; |
7753dea8 MD |
2382 | } |
2383 | case LTTNG_CONSUMER32_UST: | |
2384 | { | |
937dde8e | 2385 | char *tmpnew = NULL; |
8f4905da MD |
2386 | |
2387 | if (consumerd32_libdir[0] != '\0') { | |
2388 | char *tmp; | |
2389 | size_t tmplen; | |
2390 | ||
2391 | tmp = getenv("LD_LIBRARY_PATH"); | |
2392 | if (!tmp) { | |
2393 | tmp = ""; | |
2394 | } | |
2395 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2396 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2397 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2398 | if (!tmpnew) { | |
2399 | ret = -ENOMEM; | |
2400 | goto error; | |
2401 | } | |
2402 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2403 | strcat(tmpnew, consumerd32_libdir); | |
2404 | if (tmp[0] != '\0') { | |
2405 | strcat(tmpnew, ":"); | |
2406 | strcat(tmpnew, tmp); | |
2407 | } | |
2408 | ret = putenv(tmpnew); | |
2409 | if (ret) { | |
2410 | ret = -errno; | |
c6f76da9 | 2411 | free(tmpnew); |
8f4905da MD |
2412 | goto error; |
2413 | } | |
2414 | } | |
94c55f17 | 2415 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2416 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2417 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2418 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2419 | "--group", tracing_group_name, |
7753dea8 | 2420 | NULL); |
8f4905da MD |
2421 | if (consumerd32_libdir[0] != '\0') { |
2422 | free(tmpnew); | |
2423 | } | |
7753dea8 MD |
2424 | break; |
2425 | } | |
3bd1e081 | 2426 | default: |
76d7553f | 2427 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2428 | exit(EXIT_FAILURE); |
2429 | } | |
8c0faa1d | 2430 | if (errno != 0) { |
4282f9a3 | 2431 | PERROR("Consumer execl()"); |
8c0faa1d | 2432 | } |
4282f9a3 | 2433 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2434 | exit(EXIT_FAILURE); |
2435 | } else if (pid > 0) { | |
2436 | ret = pid; | |
8c0faa1d | 2437 | } else { |
76d7553f | 2438 | PERROR("start consumer fork"); |
8c0faa1d | 2439 | ret = -errno; |
8c0faa1d | 2440 | } |
8f4905da | 2441 | error: |
8c0faa1d DG |
2442 | return ret; |
2443 | } | |
2444 | ||
693bd40b | 2445 | /* |
3bd1e081 | 2446 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2447 | */ |
3bd1e081 | 2448 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2449 | { |
c617c0c6 | 2450 | int ret; |
edb8b045 DG |
2451 | |
2452 | /* | |
2453 | * Set the listen() state on the socket since there is a possible race | |
2454 | * between the exec() of the consumer daemon and this call if place in the | |
2455 | * consumer thread. See bug #366 for more details. | |
2456 | */ | |
2457 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2458 | if (ret < 0) { | |
2459 | goto error; | |
2460 | } | |
693bd40b | 2461 | |
3bd1e081 MD |
2462 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2463 | if (consumer_data->pid != 0) { | |
2464 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2465 | goto end; |
2466 | } | |
693bd40b | 2467 | |
3bd1e081 | 2468 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2469 | if (ret < 0) { |
3bd1e081 MD |
2470 | ERR("Spawning consumerd failed"); |
2471 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2472 | goto error; |
693bd40b | 2473 | } |
c49dc785 | 2474 | |
3bd1e081 MD |
2475 | /* Setting up the consumer_data pid */ |
2476 | consumer_data->pid = ret; | |
48842b30 | 2477 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2478 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2479 | |
3bd1e081 MD |
2480 | DBG2("Spawning consumer control thread"); |
2481 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2482 | if (ret < 0) { |
3bd1e081 | 2483 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2484 | goto error; |
2485 | } | |
2486 | ||
c49dc785 | 2487 | end: |
693bd40b DG |
2488 | return 0; |
2489 | ||
2490 | error: | |
331744e3 | 2491 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2492 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2493 | int err; |
2494 | ||
edb8b045 DG |
2495 | err = close(consumer_data->err_sock); |
2496 | if (err < 0) { | |
2497 | PERROR("close consumer data error socket"); | |
2498 | } | |
2499 | } | |
693bd40b DG |
2500 | return ret; |
2501 | } | |
2502 | ||
b73401da | 2503 | /* |
096102bd | 2504 | * Setup necessary data for kernel tracer action. |
b73401da | 2505 | */ |
096102bd | 2506 | static int init_kernel_tracer(void) |
b73401da DG |
2507 | { |
2508 | int ret; | |
b73401da | 2509 | |
096102bd DG |
2510 | /* Modprobe lttng kernel modules */ |
2511 | ret = modprobe_lttng_control(); | |
b73401da | 2512 | if (ret < 0) { |
b73401da DG |
2513 | goto error; |
2514 | } | |
2515 | ||
096102bd DG |
2516 | /* Open debugfs lttng */ |
2517 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2518 | if (kernel_tracer_fd < 0) { | |
2519 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2520 | ret = -1; |
2521 | goto error_open; | |
54d01ffb DG |
2522 | } |
2523 | ||
2f77fc4b DG |
2524 | /* Validate kernel version */ |
2525 | ret = kernel_validate_version(kernel_tracer_fd); | |
2526 | if (ret < 0) { | |
2527 | goto error_version; | |
b551a063 | 2528 | } |
54d01ffb | 2529 | |
2f77fc4b DG |
2530 | ret = modprobe_lttng_data(); |
2531 | if (ret < 0) { | |
2532 | goto error_modules; | |
54d01ffb DG |
2533 | } |
2534 | ||
2f77fc4b DG |
2535 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2536 | return 0; | |
2537 | ||
2538 | error_version: | |
2539 | modprobe_remove_lttng_control(); | |
2540 | ret = close(kernel_tracer_fd); | |
2541 | if (ret) { | |
2542 | PERROR("close"); | |
b551a063 | 2543 | } |
2f77fc4b | 2544 | kernel_tracer_fd = -1; |
f73fabfd | 2545 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2546 | |
2f77fc4b DG |
2547 | error_modules: |
2548 | ret = close(kernel_tracer_fd); | |
2549 | if (ret) { | |
2550 | PERROR("close"); | |
b551a063 | 2551 | } |
54d01ffb | 2552 | |
2f77fc4b DG |
2553 | error_open: |
2554 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2555 | |
2556 | error: | |
2f77fc4b DG |
2557 | WARN("No kernel tracer available"); |
2558 | kernel_tracer_fd = -1; | |
2559 | if (!is_root) { | |
f73fabfd | 2560 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2561 | } else { |
f73fabfd | 2562 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2563 | } |
54d01ffb DG |
2564 | } |
2565 | ||
2f77fc4b | 2566 | |
54d01ffb | 2567 | /* |
2f77fc4b DG |
2568 | * Copy consumer output from the tracing session to the domain session. The |
2569 | * function also applies the right modification on a per domain basis for the | |
2570 | * trace files destination directory. | |
36b588ed MD |
2571 | * |
2572 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2573 | */ |
2f77fc4b | 2574 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2575 | { |
2576 | int ret; | |
2f77fc4b DG |
2577 | const char *dir_name; |
2578 | struct consumer_output *consumer; | |
2579 | ||
2580 | assert(session); | |
2581 | assert(session->consumer); | |
54d01ffb | 2582 | |
b551a063 DG |
2583 | switch (domain) { |
2584 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2585 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2586 | /* |
2587 | * XXX: We should audit the session creation and what this function | |
2588 | * does "extra" in order to avoid a destroy since this function is used | |
2589 | * in the domain session creation (kernel and ust) only. Same for UST | |
2590 | * domain. | |
2591 | */ | |
2592 | if (session->kernel_session->consumer) { | |
2593 | consumer_destroy_output(session->kernel_session->consumer); | |
2594 | } | |
2f77fc4b DG |
2595 | session->kernel_session->consumer = |
2596 | consumer_copy_output(session->consumer); | |
2597 | /* Ease our life a bit for the next part */ | |
2598 | consumer = session->kernel_session->consumer; | |
2599 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2600 | break; |
f20baf8e | 2601 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2602 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2603 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2604 | if (session->ust_session->consumer) { |
2605 | consumer_destroy_output(session->ust_session->consumer); | |
2606 | } | |
2f77fc4b DG |
2607 | session->ust_session->consumer = |
2608 | consumer_copy_output(session->consumer); | |
2609 | /* Ease our life a bit for the next part */ | |
2610 | consumer = session->ust_session->consumer; | |
2611 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2612 | break; |
2613 | default: | |
f73fabfd | 2614 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2615 | goto error; |
2616 | } | |
2617 | ||
2f77fc4b | 2618 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2619 | strncat(consumer->subdir, dir_name, |
2620 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2621 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2622 | ||
f73fabfd | 2623 | ret = LTTNG_OK; |
54d01ffb DG |
2624 | |
2625 | error: | |
2626 | return ret; | |
2627 | } | |
2628 | ||
00e2e675 | 2629 | /* |
2f77fc4b | 2630 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2631 | * |
2632 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2633 | */ |
2f77fc4b DG |
2634 | static int create_ust_session(struct ltt_session *session, |
2635 | struct lttng_domain *domain) | |
00e2e675 DG |
2636 | { |
2637 | int ret; | |
2f77fc4b | 2638 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2639 | |
a4b92340 | 2640 | assert(session); |
2f77fc4b DG |
2641 | assert(domain); |
2642 | assert(session->consumer); | |
a4b92340 | 2643 | |
2f77fc4b | 2644 | switch (domain->type) { |
f20baf8e | 2645 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2646 | case LTTNG_DOMAIN_UST: |
2647 | break; | |
2648 | default: | |
2649 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2650 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2651 | goto error; |
2652 | } | |
2653 | ||
2f77fc4b DG |
2654 | DBG("Creating UST session"); |
2655 | ||
dec56f6c | 2656 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2657 | if (lus == NULL) { |
f73fabfd | 2658 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2659 | goto error; |
2660 | } | |
2661 | ||
2f77fc4b DG |
2662 | lus->uid = session->uid; |
2663 | lus->gid = session->gid; | |
2bba9e53 | 2664 | lus->output_traces = session->output_traces; |
27babd3a | 2665 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2666 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2667 | session->ust_session = lus; |
00e2e675 | 2668 | |
2f77fc4b DG |
2669 | /* Copy session output to the newly created UST session */ |
2670 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2671 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2672 | goto error; |
2673 | } | |
2674 | ||
f73fabfd | 2675 | return LTTNG_OK; |
00e2e675 DG |
2676 | |
2677 | error: | |
2f77fc4b DG |
2678 | free(lus); |
2679 | session->ust_session = NULL; | |
00e2e675 DG |
2680 | return ret; |
2681 | } | |
2682 | ||
2683 | /* | |
2f77fc4b | 2684 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2685 | */ |
2f77fc4b | 2686 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2687 | { |
2688 | int ret; | |
a4b92340 | 2689 | |
2f77fc4b | 2690 | DBG("Creating kernel session"); |
00e2e675 | 2691 | |
2f77fc4b DG |
2692 | ret = kernel_create_session(session, kernel_tracer_fd); |
2693 | if (ret < 0) { | |
f73fabfd | 2694 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2695 | goto error; |
2696 | } | |
2697 | ||
2f77fc4b DG |
2698 | /* Code flow safety */ |
2699 | assert(session->kernel_session); | |
2700 | ||
2701 | /* Copy session output to the newly created Kernel session */ | |
2702 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2703 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2704 | goto error; |
2705 | } | |
2706 | ||
2f77fc4b DG |
2707 | /* Create directory(ies) on local filesystem. */ |
2708 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2709 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2710 | ret = run_as_mkdir_recursive( | |
2711 | session->kernel_session->consumer->dst.trace_path, | |
2712 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2713 | if (ret < 0) { | |
2714 | if (ret != -EEXIST) { | |
2715 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2716 | goto error; |
2717 | } | |
00e2e675 | 2718 | } |
2f77fc4b | 2719 | } |
00e2e675 | 2720 | |
2f77fc4b DG |
2721 | session->kernel_session->uid = session->uid; |
2722 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2723 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2724 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2725 | |
f73fabfd | 2726 | return LTTNG_OK; |
00e2e675 | 2727 | |
2f77fc4b DG |
2728 | error: |
2729 | trace_kernel_destroy_session(session->kernel_session); | |
2730 | session->kernel_session = NULL; | |
2731 | return ret; | |
2732 | } | |
00e2e675 | 2733 | |
2f77fc4b DG |
2734 | /* |
2735 | * Count number of session permitted by uid/gid. | |
2736 | */ | |
2737 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2738 | { | |
2739 | unsigned int i = 0; | |
2740 | struct ltt_session *session; | |
07424f16 | 2741 | |
2f77fc4b DG |
2742 | DBG("Counting number of available session for UID %d GID %d", |
2743 | uid, gid); | |
2744 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2745 | /* |
2f77fc4b | 2746 | * Only list the sessions the user can control. |
00e2e675 | 2747 | */ |
2f77fc4b DG |
2748 | if (!session_access_ok(session, uid, gid)) { |
2749 | continue; | |
2750 | } | |
2751 | i++; | |
a4b92340 | 2752 | } |
2f77fc4b | 2753 | return i; |
00e2e675 DG |
2754 | } |
2755 | ||
54d01ffb DG |
2756 | /* |
2757 | * Process the command requested by the lttng client within the command | |
2758 | * context structure. This function make sure that the return structure (llm) | |
2759 | * is set and ready for transmission before returning. | |
2760 | * | |
2761 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2762 | * |
2763 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2764 | * |
2765 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2766 | */ |
53a80697 MD |
2767 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2768 | int *sock_error) | |
54d01ffb | 2769 | { |
f73fabfd | 2770 | int ret = LTTNG_OK; |
44d3bd01 | 2771 | int need_tracing_session = 1; |
2e09ba09 | 2772 | int need_domain; |
54d01ffb DG |
2773 | |
2774 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2775 | ||
53a80697 MD |
2776 | *sock_error = 0; |
2777 | ||
2e09ba09 MD |
2778 | switch (cmd_ctx->lsm->cmd_type) { |
2779 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2780 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2781 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2782 | case LTTNG_DESTROY_SESSION: |
2783 | case LTTNG_LIST_SESSIONS: | |
2784 | case LTTNG_LIST_DOMAINS: | |
2785 | case LTTNG_START_TRACE: | |
2786 | case LTTNG_STOP_TRACE: | |
6d805429 | 2787 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2788 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2789 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2790 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2791 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2792 | case LTTNG_SAVE_SESSION: |
2e09ba09 | 2793 | need_domain = 0; |
3aace903 | 2794 | break; |
2e09ba09 MD |
2795 | default: |
2796 | need_domain = 1; | |
2797 | } | |
2798 | ||
2799 | if (opt_no_kernel && need_domain | |
2800 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2801 | if (!is_root) { |
f73fabfd | 2802 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2803 | } else { |
f73fabfd | 2804 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2805 | } |
4fba7219 DG |
2806 | goto error; |
2807 | } | |
2808 | ||
8d3113b2 DG |
2809 | /* Deny register consumer if we already have a spawned consumer. */ |
2810 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2811 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2812 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2813 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2814 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2815 | goto error; |
2816 | } | |
2817 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2818 | } | |
2819 | ||
54d01ffb DG |
2820 | /* |
2821 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2822 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2823 | * command. |
2824 | */ | |
2825 | switch(cmd_ctx->lsm->cmd_type) { | |
2826 | case LTTNG_LIST_SESSIONS: | |
2827 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2828 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2829 | case LTTNG_LIST_DOMAINS: |
2830 | case LTTNG_LIST_CHANNELS: | |
2831 | case LTTNG_LIST_EVENTS: | |
2832 | break; | |
2833 | default: | |
2834 | /* Setup lttng message with no payload */ | |
2835 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2836 | if (ret < 0) { | |
2837 | /* This label does not try to unlock the session */ | |
2838 | goto init_setup_error; | |
2839 | } | |
2840 | } | |
2841 | ||
2842 | /* Commands that DO NOT need a session. */ | |
2843 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2844 | case LTTNG_CREATE_SESSION: |
27babd3a | 2845 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2846 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2847 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2848 | case LTTNG_LIST_SESSIONS: |
2849 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2850 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2851 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 2852 | need_tracing_session = 0; |
54d01ffb DG |
2853 | break; |
2854 | default: | |
2855 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2856 | /* |
2857 | * We keep the session list lock across _all_ commands | |
2858 | * for now, because the per-session lock does not | |
2859 | * handle teardown properly. | |
2860 | */ | |
74babd95 | 2861 | session_lock_list(); |
54d01ffb DG |
2862 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2863 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2864 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2865 | goto error; |
2866 | } else { | |
2867 | /* Acquire lock for the session */ | |
2868 | session_lock(cmd_ctx->session); | |
2869 | } | |
2870 | break; | |
2871 | } | |
b389abbe | 2872 | |
5f3ecf22 DG |
2873 | /* |
2874 | * Commands that need a valid session but should NOT create one if none | |
2875 | * exists. Instead of creating one and destroying it when the command is | |
2876 | * handled, process that right before so we save some round trip in useless | |
2877 | * code path. | |
2878 | */ | |
2879 | switch (cmd_ctx->lsm->cmd_type) { | |
2880 | case LTTNG_DISABLE_CHANNEL: | |
2881 | case LTTNG_DISABLE_EVENT: | |
2882 | case LTTNG_DISABLE_ALL_EVENT: | |
2883 | switch (cmd_ctx->lsm->domain.type) { | |
2884 | case LTTNG_DOMAIN_KERNEL: | |
2885 | if (!cmd_ctx->session->kernel_session) { | |
2886 | ret = LTTNG_ERR_NO_CHANNEL; | |
2887 | goto error; | |
2888 | } | |
2889 | break; | |
2890 | case LTTNG_DOMAIN_JUL: | |
2891 | case LTTNG_DOMAIN_UST: | |
2892 | if (!cmd_ctx->session->ust_session) { | |
2893 | ret = LTTNG_ERR_NO_CHANNEL; | |
2894 | goto error; | |
2895 | } | |
2896 | break; | |
2897 | default: | |
2898 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
2899 | goto error; | |
2900 | } | |
2901 | default: | |
2902 | break; | |
2903 | } | |
2904 | ||
2e09ba09 MD |
2905 | if (!need_domain) { |
2906 | goto skip_domain; | |
2907 | } | |
a4b92340 | 2908 | |
54d01ffb DG |
2909 | /* |
2910 | * Check domain type for specific "pre-action". | |
2911 | */ | |
2912 | switch (cmd_ctx->lsm->domain.type) { | |
2913 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2914 | if (!is_root) { |
f73fabfd | 2915 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2916 | goto error; |
2917 | } | |
2918 | ||
54d01ffb | 2919 | /* Kernel tracer check */ |
a4b35e07 | 2920 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2921 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2922 | ret = init_kernel_tracer(); |
2923 | if (ret != 0) { | |
54d01ffb DG |
2924 | goto error; |
2925 | } | |
2926 | } | |
5eb91c98 | 2927 | |
5c827ce0 DG |
2928 | /* Consumer is in an ERROR state. Report back to client */ |
2929 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2930 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2931 | goto error; |
2932 | } | |
2933 | ||
54d01ffb | 2934 | /* Need a session for kernel command */ |
44d3bd01 | 2935 | if (need_tracing_session) { |
54d01ffb | 2936 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2937 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2938 | if (ret < 0) { |
f73fabfd | 2939 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2940 | goto error; |
2941 | } | |
b389abbe | 2942 | } |
7d29a247 | 2943 | |
54d01ffb | 2944 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2945 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2946 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2947 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2948 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2949 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2950 | if (ret < 0) { |
f73fabfd | 2951 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2952 | goto error; |
950131af | 2953 | } |
5c827ce0 | 2954 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2955 | } else { |
2956 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2957 | } |
173af62f | 2958 | |
a4b92340 DG |
2959 | /* |
2960 | * The consumer was just spawned so we need to add the socket to | |
2961 | * the consumer output of the session if exist. | |
2962 | */ | |
2963 | ret = consumer_create_socket(&kconsumer_data, | |
2964 | cmd_ctx->session->kernel_session->consumer); | |
2965 | if (ret < 0) { | |
2966 | goto error; | |
173af62f | 2967 | } |
0d0c377a | 2968 | } |
5c827ce0 | 2969 | |
54d01ffb | 2970 | break; |
b9dfb167 | 2971 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2972 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2973 | { |
b51ec5b4 MD |
2974 | if (!ust_app_supported()) { |
2975 | ret = LTTNG_ERR_NO_UST; | |
2976 | goto error; | |
2977 | } | |
5c827ce0 DG |
2978 | /* Consumer is in an ERROR state. Report back to client */ |
2979 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2980 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2981 | goto error; |
2982 | } | |
2983 | ||
44d3bd01 | 2984 | if (need_tracing_session) { |
a4b92340 | 2985 | /* Create UST session if none exist. */ |
f6a9efaa | 2986 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2987 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2988 | &cmd_ctx->lsm->domain); |
f73fabfd | 2989 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2990 | goto error; |
2991 | } | |
2992 | } | |
00e2e675 | 2993 | |
7753dea8 MD |
2994 | /* Start the UST consumer daemons */ |
2995 | /* 64-bit */ | |
2996 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2997 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2998 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2999 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3000 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3001 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3002 | if (ret < 0) { |
f73fabfd | 3003 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3004 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3005 | goto error; |
3006 | } | |
48842b30 | 3007 | |
173af62f | 3008 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3009 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3010 | } else { |
7753dea8 MD |
3011 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3012 | } | |
173af62f DG |
3013 | |
3014 | /* | |
3015 | * Setup socket for consumer 64 bit. No need for atomic access | |
3016 | * since it was set above and can ONLY be set in this thread. | |
3017 | */ | |
a4b92340 DG |
3018 | ret = consumer_create_socket(&ustconsumer64_data, |
3019 | cmd_ctx->session->ust_session->consumer); | |
3020 | if (ret < 0) { | |
3021 | goto error; | |
173af62f DG |
3022 | } |
3023 | ||
7753dea8 | 3024 | /* 32-bit */ |
04d21009 | 3025 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3026 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3027 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3028 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3029 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3030 | ret = start_consumerd(&ustconsumer32_data); | |
3031 | if (ret < 0) { | |
f73fabfd | 3032 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3033 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3034 | goto error; |
3035 | } | |
5c827ce0 | 3036 | |
173af62f | 3037 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3038 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3039 | } else { |
3040 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3041 | } |
173af62f DG |
3042 | |
3043 | /* | |
3044 | * Setup socket for consumer 64 bit. No need for atomic access | |
3045 | * since it was set above and can ONLY be set in this thread. | |
3046 | */ | |
a4b92340 DG |
3047 | ret = consumer_create_socket(&ustconsumer32_data, |
3048 | cmd_ctx->session->ust_session->consumer); | |
3049 | if (ret < 0) { | |
3050 | goto error; | |
173af62f | 3051 | } |
44d3bd01 DG |
3052 | } |
3053 | break; | |
48842b30 | 3054 | } |
54d01ffb | 3055 | default: |
54d01ffb DG |
3056 | break; |
3057 | } | |
2e09ba09 | 3058 | skip_domain: |
33a2b854 | 3059 | |
5c827ce0 DG |
3060 | /* Validate consumer daemon state when start/stop trace command */ |
3061 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3062 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3063 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3064 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
3065 | case LTTNG_DOMAIN_UST: |
3066 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3067 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3068 | goto error; |
3069 | } | |
3070 | break; | |
3071 | case LTTNG_DOMAIN_KERNEL: | |
3072 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3073 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3074 | goto error; |
3075 | } | |
3076 | break; | |
3077 | } | |
3078 | } | |
3079 | ||
8e0af1b4 MD |
3080 | /* |
3081 | * Check that the UID or GID match that of the tracing session. | |
3082 | * The root user can interact with all sessions. | |
3083 | */ | |
3084 | if (need_tracing_session) { | |
3085 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3086 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3087 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3088 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3089 | goto error; |
3090 | } | |
3091 | } | |
3092 | ||
ffe60014 DG |
3093 | /* |
3094 | * Send relayd information to consumer as soon as we have a domain and a | |
3095 | * session defined. | |
3096 | */ | |
3097 | if (cmd_ctx->session && need_domain) { | |
3098 | /* | |
3099 | * Setup relayd if not done yet. If the relayd information was already | |
3100 | * sent to the consumer, this call will gracefully return. | |
3101 | */ | |
3102 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3103 | if (ret != LTTNG_OK) { | |
3104 | goto error; | |
3105 | } | |
3106 | } | |
3107 | ||
54d01ffb DG |
3108 | /* Process by command type */ |
3109 | switch (cmd_ctx->lsm->cmd_type) { | |
3110 | case LTTNG_ADD_CONTEXT: | |
3111 | { | |
3112 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3113 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3114 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3115 | break; |
3116 | } | |
3117 | case LTTNG_DISABLE_CHANNEL: | |
3118 | { | |
3119 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3120 | cmd_ctx->lsm->u.disable.channel_name); | |
3121 | break; | |
3122 | } | |
3123 | case LTTNG_DISABLE_EVENT: | |
3124 | { | |
3125 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3126 | cmd_ctx->lsm->u.disable.channel_name, | |
3127 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3128 | break; |
3129 | } | |
54d01ffb DG |
3130 | case LTTNG_DISABLE_ALL_EVENT: |
3131 | { | |
2bdd86d4 | 3132 | DBG("Disabling all events"); |
54d01ffb DG |
3133 | |
3134 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3135 | cmd_ctx->lsm->u.disable.channel_name); | |
3136 | break; | |
3137 | } | |
3138 | case LTTNG_ENABLE_CHANNEL: | |
3139 | { | |
7972aab2 | 3140 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3141 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3142 | break; |
3143 | } | |
3144 | case LTTNG_ENABLE_EVENT: | |
3145 | { | |
882ef835 JI |
3146 | struct lttng_event_exclusion *exclusion = NULL; |
3147 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3148 | char *filter_expression = NULL; |
882ef835 | 3149 | |
67676bd8 DG |
3150 | /* Handle exclusion events and receive it from the client. */ |
3151 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3152 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3153 | ||
3154 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3155 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3156 | if (!exclusion) { | |
3157 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3158 | goto error; | |
882ef835 | 3159 | } |
882ef835 | 3160 | |
67676bd8 DG |
3161 | DBG("Receiving var len exclusion event list from client ..."); |
3162 | exclusion->count = count; | |
3163 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3164 | count * LTTNG_SYMBOL_NAME_LEN); | |
3165 | if (ret <= 0) { | |
3166 | DBG("Nothing recv() from client var len data... continuing"); | |
3167 | *sock_error = 1; | |
3168 | free(exclusion); | |
3169 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3170 | goto error; | |
3171 | } | |
3172 | } | |
3173 | ||
6b453b5e JG |
3174 | /* Get filter expression from client. */ |
3175 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3176 | size_t expression_len = | |
3177 | cmd_ctx->lsm->u.enable.expression_len; | |
3178 | ||
3179 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3180 | ret = LTTNG_ERR_FILTER_INVAL; | |
3181 | free(exclusion); | |
3182 | goto error; | |
3183 | } | |
3184 | ||
3185 | filter_expression = zmalloc(expression_len); | |
3186 | if (!filter_expression) { | |
3187 | free(exclusion); | |
3188 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3189 | goto error; | |
3190 | } | |
3191 | ||
3192 | /* Receive var. len. data */ | |
3193 | DBG("Receiving var len filter's expression from client ..."); | |
3194 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3195 | expression_len); | |
3196 | if (ret <= 0) { | |
3197 | DBG("Nothing recv() from client car len data... continuing"); | |
3198 | *sock_error = 1; | |
3199 | free(filter_expression); | |
3200 | free(exclusion); | |
3201 | ret = LTTNG_ERR_FILTER_INVAL; | |
3202 | goto error; | |
3203 | } | |
3204 | } | |
3205 | ||
67676bd8 DG |
3206 | /* Handle filter and get bytecode from client. */ |
3207 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3208 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3209 | ||
3210 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3211 | ret = LTTNG_ERR_FILTER_INVAL; | |
7ea8750c | 3212 | free(filter_expression); |
67676bd8 DG |
3213 | free(exclusion); |
3214 | goto error; | |
3215 | } | |
3216 | ||
3217 | bytecode = zmalloc(bytecode_len); | |
3218 | if (!bytecode) { | |
7ea8750c | 3219 | free(filter_expression); |
67676bd8 DG |
3220 | free(exclusion); |
3221 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3222 | goto error; | |
882ef835 JI |
3223 | } |
3224 | ||
67676bd8 DG |
3225 | /* Receive var. len. data */ |
3226 | DBG("Receiving var len filter's bytecode from client ..."); | |
3227 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3228 | if (ret <= 0) { | |
3229 | DBG("Nothing recv() from client car len data... continuing"); | |
3230 | *sock_error = 1; | |
7ea8750c | 3231 | free(filter_expression); |
67676bd8 DG |
3232 | free(bytecode); |
3233 | free(exclusion); | |
3234 | ret = LTTNG_ERR_FILTER_INVAL; | |
3235 | goto error; | |
3236 | } | |
3237 | ||
3238 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
7ea8750c | 3239 | free(filter_expression); |
67676bd8 DG |
3240 | free(bytecode); |
3241 | free(exclusion); | |
3242 | ret = LTTNG_ERR_FILTER_INVAL; | |
3243 | goto error; | |
3244 | } | |
882ef835 | 3245 | } |
67676bd8 DG |
3246 | |
3247 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3248 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3249 | &cmd_ctx->lsm->u.enable.event, |
3250 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3251 | kernel_poll_pipe[1]); |
54d01ffb DG |
3252 | break; |
3253 | } | |
3254 | case LTTNG_ENABLE_ALL_EVENT: | |
3255 | { | |
2bdd86d4 | 3256 | DBG("Enabling all events"); |
54d01ffb | 3257 | |
7972aab2 | 3258 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3259 | cmd_ctx->lsm->u.enable.channel_name, |
6b453b5e JG |
3260 | cmd_ctx->lsm->u.enable.event.type, NULL, NULL, |
3261 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3262 | break; |
3263 | } | |
052da939 | 3264 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3265 | { |
9f19cc17 | 3266 | struct lttng_event *events; |
54d01ffb | 3267 | ssize_t nb_events; |
052da939 | 3268 | |
0845bbfa | 3269 | session_lock_list(); |
54d01ffb | 3270 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3271 | session_unlock_list(); |
54d01ffb | 3272 | if (nb_events < 0) { |
f73fabfd | 3273 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3274 | ret = -nb_events; |
3275 | goto error; | |
2ef84c95 DG |
3276 | } |
3277 | ||
3278 | /* | |
3279 | * Setup lttng message with payload size set to the event list size in | |
3280 | * bytes and then copy list into the llm payload. | |
3281 | */ | |
052da939 | 3282 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3283 | if (ret < 0) { |
052da939 | 3284 | free(events); |
2ef84c95 DG |
3285 | goto setup_error; |
3286 | } | |
3287 | ||
3288 | /* Copy event list into message payload */ | |
9f19cc17 | 3289 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3290 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3291 | |
9f19cc17 | 3292 | free(events); |
2ef84c95 | 3293 | |
f73fabfd | 3294 | ret = LTTNG_OK; |
2ef84c95 DG |
3295 | break; |
3296 | } | |
f37d259d MD |
3297 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3298 | { | |
3299 | struct lttng_event_field *fields; | |
3300 | ssize_t nb_fields; | |
3301 | ||
0845bbfa | 3302 | session_lock_list(); |
a4b92340 DG |
3303 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3304 | &fields); | |
0845bbfa | 3305 | session_unlock_list(); |
f37d259d | 3306 | if (nb_fields < 0) { |
f73fabfd | 3307 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3308 | ret = -nb_fields; |
3309 | goto error; | |
3310 | } | |
3311 | ||
3312 | /* | |
3313 | * Setup lttng message with payload size set to the event list size in | |
3314 | * bytes and then copy list into the llm payload. | |
3315 | */ | |
a4b92340 DG |
3316 | ret = setup_lttng_msg(cmd_ctx, |
3317 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3318 | if (ret < 0) { |
3319 | free(fields); | |
3320 | goto setup_error; | |
3321 | } | |
3322 | ||
3323 | /* Copy event list into message payload */ | |
3324 | memcpy(cmd_ctx->llm->payload, fields, | |
3325 | sizeof(struct lttng_event_field) * nb_fields); | |
3326 | ||
3327 | free(fields); | |
3328 | ||
f73fabfd | 3329 | ret = LTTNG_OK; |
f37d259d MD |
3330 | break; |
3331 | } | |
00e2e675 DG |
3332 | case LTTNG_SET_CONSUMER_URI: |
3333 | { | |
a4b92340 DG |
3334 | size_t nb_uri, len; |
3335 | struct lttng_uri *uris; | |
3336 | ||
3337 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3338 | len = nb_uri * sizeof(struct lttng_uri); | |
3339 | ||
3340 | if (nb_uri == 0) { | |
f73fabfd | 3341 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3342 | goto error; |
3343 | } | |
3344 | ||
3345 | uris = zmalloc(len); | |
3346 | if (uris == NULL) { | |
f73fabfd | 3347 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3348 | goto error; |
3349 | } | |
3350 | ||
3351 | /* Receive variable len data */ | |
77c7c900 | 3352 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3353 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3354 | if (ret <= 0) { | |
3355 | DBG("No URIs received from client... continuing"); | |
3356 | *sock_error = 1; | |
f73fabfd | 3357 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3358 | free(uris); |
a4b92340 DG |
3359 | goto error; |
3360 | } | |
3361 | ||
00e2e675 | 3362 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3363 | nb_uri, uris); |
f73fabfd | 3364 | if (ret != LTTNG_OK) { |
b1d41407 | 3365 | free(uris); |
a4b92340 DG |
3366 | goto error; |
3367 | } | |
3368 | ||
3369 | /* | |
3370 | * XXX: 0 means that this URI should be applied on the session. Should | |
3371 | * be a DOMAIN enuam. | |
3372 | */ | |
3373 | if (cmd_ctx->lsm->domain.type == 0) { | |
3374 | /* Add the URI for the UST session if a consumer is present. */ | |
3375 | if (cmd_ctx->session->ust_session && | |
3376 | cmd_ctx->session->ust_session->consumer) { | |
3377 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3378 | nb_uri, uris); | |
3379 | } else if (cmd_ctx->session->kernel_session && | |
3380 | cmd_ctx->session->kernel_session->consumer) { | |
3381 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3382 | cmd_ctx->session, nb_uri, uris); | |
3383 | } | |
3384 | } | |
3385 | ||
b1d41407 DG |
3386 | free(uris); |
3387 | ||
00e2e675 DG |
3388 | break; |
3389 | } | |
f3ed775e | 3390 | case LTTNG_START_TRACE: |
8c0faa1d | 3391 | { |
54d01ffb | 3392 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3393 | break; |
3394 | } | |
f3ed775e | 3395 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3396 | { |
54d01ffb | 3397 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3398 | break; |
3399 | } | |
5e16da05 MD |
3400 | case LTTNG_CREATE_SESSION: |
3401 | { | |
a4b92340 DG |
3402 | size_t nb_uri, len; |
3403 | struct lttng_uri *uris = NULL; | |
3404 | ||
3405 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3406 | len = nb_uri * sizeof(struct lttng_uri); | |
3407 | ||
3408 | if (nb_uri > 0) { | |
3409 | uris = zmalloc(len); | |
3410 | if (uris == NULL) { | |
f73fabfd | 3411 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3412 | goto error; |
3413 | } | |
3414 | ||
3415 | /* Receive variable len data */ | |
77c7c900 | 3416 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3417 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3418 | if (ret <= 0) { | |
3419 | DBG("No URIs received from client... continuing"); | |
3420 | *sock_error = 1; | |
f73fabfd | 3421 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3422 | free(uris); |
a4b92340 DG |
3423 | goto error; |
3424 | } | |
3425 | ||
3426 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3427 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3428 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3429 | free(uris); |
a4b92340 DG |
3430 | goto error; |
3431 | } | |
3432 | } | |
3433 | ||
3434 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3435 | &cmd_ctx->creds, 0); |
a4b92340 | 3436 | |
b1d41407 DG |
3437 | free(uris); |
3438 | ||
00e2e675 DG |
3439 | break; |
3440 | } | |
5e16da05 MD |
3441 | case LTTNG_DESTROY_SESSION: |
3442 | { | |
2f77fc4b | 3443 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3444 | |
3445 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3446 | cmd_ctx->session = NULL; |
5461b305 | 3447 | break; |
5e16da05 | 3448 | } |
9f19cc17 | 3449 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3450 | { |
54d01ffb DG |
3451 | ssize_t nb_dom; |
3452 | struct lttng_domain *domains; | |
5461b305 | 3453 | |
54d01ffb DG |
3454 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3455 | if (nb_dom < 0) { | |
f73fabfd | 3456 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3457 | ret = -nb_dom; |
3458 | goto error; | |
ce3d728c | 3459 | } |
520ff687 | 3460 | |
54d01ffb | 3461 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3462 | if (ret < 0) { |
ae9c20bc | 3463 | free(domains); |
5461b305 | 3464 | goto setup_error; |
520ff687 | 3465 | } |
57167058 | 3466 | |
54d01ffb DG |
3467 | /* Copy event list into message payload */ |
3468 | memcpy(cmd_ctx->llm->payload, domains, | |
3469 | nb_dom * sizeof(struct lttng_domain)); | |
3470 | ||
3471 | free(domains); | |
5e16da05 | 3472 | |
f73fabfd | 3473 | ret = LTTNG_OK; |
5e16da05 MD |
3474 | break; |
3475 | } | |
9f19cc17 | 3476 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3477 | { |
6775595e | 3478 | int nb_chan; |
d2243cc1 | 3479 | struct lttng_channel *channels = NULL; |
54d01ffb | 3480 | |
b551a063 DG |
3481 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3482 | cmd_ctx->session, &channels); | |
54d01ffb | 3483 | if (nb_chan < 0) { |
f73fabfd | 3484 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3485 | ret = -nb_chan; |
3486 | goto error; | |
5461b305 | 3487 | } |
ca95a216 | 3488 | |
54d01ffb | 3489 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3490 | if (ret < 0) { |
ae9c20bc | 3491 | free(channels); |
5461b305 DG |
3492 | goto setup_error; |
3493 | } | |
9f19cc17 | 3494 | |
54d01ffb DG |
3495 | /* Copy event list into message payload */ |
3496 | memcpy(cmd_ctx->llm->payload, channels, | |
3497 | nb_chan * sizeof(struct lttng_channel)); | |
3498 | ||
3499 | free(channels); | |
9f19cc17 | 3500 | |
f73fabfd | 3501 | ret = LTTNG_OK; |
5461b305 | 3502 | break; |
5e16da05 | 3503 | } |
9f19cc17 | 3504 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3505 | { |
b551a063 | 3506 | ssize_t nb_event; |
684d34d2 | 3507 | struct lttng_event *events = NULL; |
9f19cc17 | 3508 | |
b551a063 | 3509 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3510 | cmd_ctx->lsm->u.list.channel_name, &events); |
3511 | if (nb_event < 0) { | |
f73fabfd | 3512 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3513 | ret = -nb_event; |
3514 | goto error; | |
5461b305 | 3515 | } |
ca95a216 | 3516 | |
54d01ffb | 3517 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3518 | if (ret < 0) { |
ae9c20bc | 3519 | free(events); |
5461b305 DG |
3520 | goto setup_error; |
3521 | } | |
9f19cc17 | 3522 | |
54d01ffb DG |
3523 | /* Copy event list into message payload */ |
3524 | memcpy(cmd_ctx->llm->payload, events, | |
3525 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3526 | |
54d01ffb | 3527 | free(events); |
9f19cc17 | 3528 | |
f73fabfd | 3529 | ret = LTTNG_OK; |
5461b305 | 3530 | break; |
5e16da05 MD |
3531 | } |
3532 | case LTTNG_LIST_SESSIONS: | |
3533 | { | |
8e0af1b4 | 3534 | unsigned int nr_sessions; |
5461b305 | 3535 | |
8e0af1b4 | 3536 | session_lock_list(); |
730389d9 DG |
3537 | nr_sessions = lttng_sessions_count( |
3538 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3539 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3540 | |
8e0af1b4 | 3541 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3542 | if (ret < 0) { |
54d01ffb | 3543 | session_unlock_list(); |
5461b305 | 3544 | goto setup_error; |
e065084a | 3545 | } |
5e16da05 | 3546 | |
6c9cc2ab | 3547 | /* Filled the session array */ |
2f77fc4b | 3548 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3549 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3550 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3551 | |
54d01ffb | 3552 | session_unlock_list(); |
5e16da05 | 3553 | |
f73fabfd | 3554 | ret = LTTNG_OK; |
5e16da05 MD |
3555 | break; |
3556 | } | |
d0254c7c MD |
3557 | case LTTNG_CALIBRATE: |
3558 | { | |
54d01ffb DG |
3559 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3560 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3561 | break; |
3562 | } | |
d9800920 DG |
3563 | case LTTNG_REGISTER_CONSUMER: |
3564 | { | |
2f77fc4b DG |
3565 | struct consumer_data *cdata; |
3566 | ||
3567 | switch (cmd_ctx->lsm->domain.type) { | |
3568 | case LTTNG_DOMAIN_KERNEL: | |
3569 | cdata = &kconsumer_data; | |
3570 | break; | |
3571 | default: | |
f73fabfd | 3572 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3573 | goto error; |
3574 | } | |
3575 | ||
54d01ffb | 3576 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3577 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3578 | break; |
3579 | } | |
6d805429 | 3580 | case LTTNG_DATA_PENDING: |
806e2684 | 3581 | { |
6d805429 | 3582 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3583 | break; |
3584 | } | |
da3c9ec1 DG |
3585 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3586 | { | |
6dc3064a DG |
3587 | struct lttcomm_lttng_output_id reply; |
3588 | ||
3589 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3590 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3591 | if (ret != LTTNG_OK) { | |
3592 | goto error; | |
3593 | } | |
3594 | ||
3595 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3596 | if (ret < 0) { | |
3597 | goto setup_error; | |
3598 | } | |
3599 | ||
3600 | /* Copy output list into message payload */ | |
3601 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3602 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3603 | break; |
3604 | } | |
3605 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3606 | { | |
6dc3064a DG |
3607 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3608 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3609 | break; |
3610 | } | |
3611 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3612 | { | |
6dc3064a DG |
3613 | ssize_t nb_output; |
3614 | struct lttng_snapshot_output *outputs = NULL; | |
3615 | ||
3616 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3617 | if (nb_output < 0) { | |
3618 | ret = -nb_output; | |
3619 | goto error; | |
3620 | } | |
3621 | ||
3622 | ret = setup_lttng_msg(cmd_ctx, | |
3623 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3624 | if (ret < 0) { | |
3625 | free(outputs); | |
3626 | goto setup_error; | |
3627 | } | |
3628 | ||
3629 | if (outputs) { | |
3630 | /* Copy output list into message payload */ | |
3631 | memcpy(cmd_ctx->llm->payload, outputs, | |
3632 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3633 | free(outputs); | |
3634 | } | |
3635 | ||
3636 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3637 | break; |
3638 | } | |
3639 | case LTTNG_SNAPSHOT_RECORD: | |
3640 | { | |
6dc3064a DG |
3641 | ret = cmd_snapshot_record(cmd_ctx->session, |
3642 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3643 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3644 | break; |
3645 | } | |
27babd3a DG |
3646 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3647 | { | |
3648 | size_t nb_uri, len; | |
3649 | struct lttng_uri *uris = NULL; | |
3650 | ||
3651 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3652 | len = nb_uri * sizeof(struct lttng_uri); | |
3653 | ||
3654 | if (nb_uri > 0) { | |
3655 | uris = zmalloc(len); | |
3656 | if (uris == NULL) { | |
3657 | ret = LTTNG_ERR_FATAL; | |
3658 | goto error; | |
3659 | } | |
3660 | ||
3661 | /* Receive variable len data */ | |
3662 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3663 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3664 | if (ret <= 0) { | |
3665 | DBG("No URIs received from client... continuing"); | |
3666 | *sock_error = 1; | |
3667 | ret = LTTNG_ERR_SESSION_FAIL; | |
3668 | free(uris); | |
3669 | goto error; | |
3670 | } | |
3671 | ||
3672 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3673 | DBG("Creating session with ONE network URI is a bad call"); | |
3674 | ret = LTTNG_ERR_SESSION_FAIL; | |
3675 | free(uris); | |
3676 | goto error; | |
3677 | } | |
3678 | } | |
3679 | ||
3680 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3681 | nb_uri, &cmd_ctx->creds); | |
3682 | free(uris); | |
3683 | break; | |
3684 | } | |
ecc48a90 JD |
3685 | case LTTNG_CREATE_SESSION_LIVE: |
3686 | { | |
3687 | size_t nb_uri, len; | |
3688 | struct lttng_uri *uris = NULL; | |
3689 | ||
3690 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3691 | len = nb_uri * sizeof(struct lttng_uri); | |
3692 | ||
3693 | if (nb_uri > 0) { | |
3694 | uris = zmalloc(len); | |
3695 | if (uris == NULL) { | |
3696 | ret = LTTNG_ERR_FATAL; | |
3697 | goto error; | |
3698 | } | |
3699 | ||
3700 | /* Receive variable len data */ | |
3701 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3702 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3703 | if (ret <= 0) { | |
3704 | DBG("No URIs received from client... continuing"); | |
3705 | *sock_error = 1; | |
3706 | ret = LTTNG_ERR_SESSION_FAIL; | |
3707 | free(uris); | |
3708 | goto error; | |
3709 | } | |
3710 | ||
3711 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3712 | DBG("Creating session with ONE network URI is a bad call"); | |
3713 | ret = LTTNG_ERR_SESSION_FAIL; | |
3714 | free(uris); | |
3715 | goto error; | |
3716 | } | |
3717 | } | |
3718 | ||
3719 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3720 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3721 | free(uris); | |
3722 | break; | |
3723 | } | |
fb198a11 JG |
3724 | case LTTNG_SAVE_SESSION: |
3725 | { | |
3726 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3727 | &cmd_ctx->creds); | |
3728 | break; | |
3729 | } | |
5e16da05 | 3730 | default: |
f73fabfd | 3731 | ret = LTTNG_ERR_UND; |
5461b305 | 3732 | break; |
fac6795d DG |
3733 | } |
3734 | ||
5461b305 | 3735 | error: |
5461b305 DG |
3736 | if (cmd_ctx->llm == NULL) { |
3737 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3738 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3739 | goto setup_error; |
3740 | } | |
3741 | } | |
54d01ffb | 3742 | /* Set return code */ |
5461b305 | 3743 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3744 | setup_error: |
b5541356 | 3745 | if (cmd_ctx->session) { |
54d01ffb | 3746 | session_unlock(cmd_ctx->session); |
b5541356 | 3747 | } |
256a5576 MD |
3748 | if (need_tracing_session) { |
3749 | session_unlock_list(); | |
3750 | } | |
54d01ffb | 3751 | init_setup_error: |
8028d920 | 3752 | return ret; |
fac6795d DG |
3753 | } |
3754 | ||
44a5e5eb DG |
3755 | /* |
3756 | * Thread managing health check socket. | |
3757 | */ | |
3758 | static void *thread_manage_health(void *data) | |
3759 | { | |
eb4a2943 | 3760 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3761 | uint32_t revents, nb_fd; |
3762 | struct lttng_poll_event events; | |
0c89d795 MD |
3763 | struct health_comm_msg msg; |
3764 | struct health_comm_reply reply; | |
44a5e5eb DG |
3765 | |
3766 | DBG("[thread] Manage health check started"); | |
3767 | ||
3768 | rcu_register_thread(); | |
3769 | ||
6d737ce4 DG |
3770 | /* We might hit an error path before this is created. */ |
3771 | lttng_poll_init(&events); | |
3cc04881 | 3772 | |
44a5e5eb DG |
3773 | /* Create unix socket */ |
3774 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3775 | if (sock < 0) { | |
3776 | ERR("Unable to create health check Unix socket"); | |
3777 | ret = -1; | |
3778 | goto error; | |
3779 | } | |
3780 | ||
6c71277b MD |
3781 | if (is_root) { |
3782 | /* lttng health client socket path permissions */ | |
3783 | ret = chown(health_unix_sock_path, 0, | |
3784 | utils_get_group_id(tracing_group_name)); | |
3785 | if (ret < 0) { | |
3786 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3787 | PERROR("chown"); | |
3788 | ret = -1; | |
3789 | goto error; | |
3790 | } | |
3791 | ||
3792 | ret = chmod(health_unix_sock_path, | |
3793 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3794 | if (ret < 0) { | |
3795 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3796 | PERROR("chmod"); | |
3797 | ret = -1; | |
3798 | goto error; | |
3799 | } | |
3800 | } | |
3801 | ||
b662582b DG |
3802 | /* |
3803 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3804 | * show must go on. | |
3805 | */ | |
3806 | (void) utils_set_fd_cloexec(sock); | |
3807 | ||
44a5e5eb DG |
3808 | ret = lttcomm_listen_unix_sock(sock); |
3809 | if (ret < 0) { | |
3810 | goto error; | |
3811 | } | |
3812 | ||
3813 | /* | |
3814 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3815 | * more will be added to this poll set. | |
3816 | */ | |
d0b96690 | 3817 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3818 | if (ret < 0) { |
3819 | goto error; | |
3820 | } | |
3821 | ||
3822 | /* Add the application registration socket */ | |
3823 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3824 | if (ret < 0) { | |
3825 | goto error; | |
3826 | } | |
3827 | ||
ef367a93 | 3828 | sessiond_notify_ready(); |
97bc1426 | 3829 | |
44a5e5eb DG |
3830 | while (1) { |
3831 | DBG("Health check ready"); | |
3832 | ||
44a5e5eb DG |
3833 | /* Inifinite blocking call, waiting for transmission */ |
3834 | restart: | |
3835 | ret = lttng_poll_wait(&events, -1); | |
3836 | if (ret < 0) { | |
3837 | /* | |
3838 | * Restart interrupted system call. | |
3839 | */ | |
3840 | if (errno == EINTR) { | |
3841 | goto restart; | |
3842 | } | |
3843 | goto error; | |
3844 | } | |
3845 | ||
0d9c5d77 DG |
3846 | nb_fd = ret; |
3847 | ||
44a5e5eb DG |
3848 | for (i = 0; i < nb_fd; i++) { |
3849 | /* Fetch once the poll data */ | |
3850 | revents = LTTNG_POLL_GETEV(&events, i); | |
3851 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3852 | ||
3853 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3854 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3855 | if (ret) { |
139ac872 MD |
3856 | err = 0; |
3857 | goto exit; | |
44a5e5eb DG |
3858 | } |
3859 | ||
3860 | /* Event on the registration socket */ | |
3861 | if (pollfd == sock) { | |
3862 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3863 | ERR("Health socket poll error"); | |
3864 | goto error; | |
3865 | } | |
3866 | } | |
3867 | } | |
3868 | ||
3869 | new_sock = lttcomm_accept_unix_sock(sock); | |
3870 | if (new_sock < 0) { | |
3871 | goto error; | |
3872 | } | |
3873 | ||
b662582b DG |
3874 | /* |
3875 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3876 | * show must go on. | |
3877 | */ | |
3878 | (void) utils_set_fd_cloexec(new_sock); | |
3879 | ||
44a5e5eb DG |
3880 | DBG("Receiving data from client for health..."); |
3881 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3882 | if (ret <= 0) { | |
3883 | DBG("Nothing recv() from client... continuing"); | |
3884 | ret = close(new_sock); | |
3885 | if (ret) { | |
3886 | PERROR("close"); | |
3887 | } | |
3888 | new_sock = -1; | |
3889 | continue; | |
3890 | } | |
3891 | ||
3892 | rcu_thread_online(); | |
3893 | ||
53efb85a | 3894 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
3895 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
3896 | /* | |
3897 | * health_check_state returns 0 if health is | |
3898 | * bad. | |
3899 | */ | |
3900 | if (!health_check_state(health_sessiond, i)) { | |
3901 | reply.ret_code |= 1ULL << i; | |
3902 | } | |
44a5e5eb DG |
3903 | } |
3904 | ||
6c71277b | 3905 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3906 | |
3907 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3908 | if (ret < 0) { | |
3909 | ERR("Failed to send health data back to client"); | |
3910 | } | |
3911 | ||
3912 | /* End of transmission */ | |
3913 | ret = close(new_sock); | |
3914 | if (ret) { | |
3915 | PERROR("close"); | |
3916 | } | |
3917 | new_sock = -1; | |
3918 | } | |
3919 | ||
139ac872 | 3920 | exit: |
44a5e5eb | 3921 | error: |
139ac872 MD |
3922 | if (err) { |
3923 | ERR("Health error occurred in %s", __func__); | |
3924 | } | |
44a5e5eb DG |
3925 | DBG("Health check thread dying"); |
3926 | unlink(health_unix_sock_path); | |
3927 | if (sock >= 0) { | |
3928 | ret = close(sock); | |
3929 | if (ret) { | |
3930 | PERROR("close"); | |
3931 | } | |
3932 | } | |
44a5e5eb DG |
3933 | |
3934 | lttng_poll_clean(&events); | |
3935 | ||
3936 | rcu_unregister_thread(); | |
3937 | return NULL; | |
3938 | } | |
3939 | ||
1d4b027a | 3940 | /* |
d063d709 DG |
3941 | * This thread manage all clients request using the unix client socket for |
3942 | * communication. | |
1d4b027a DG |
3943 | */ |
3944 | static void *thread_manage_clients(void *data) | |
3945 | { | |
139ac872 | 3946 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3947 | int sock_error; |
5eb91c98 | 3948 | uint32_t revents, nb_fd; |
273ea72c | 3949 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3950 | struct lttng_poll_event events; |
1d4b027a DG |
3951 | |
3952 | DBG("[thread] Manage client started"); | |
3953 | ||
f6a9efaa DG |
3954 | rcu_register_thread(); |
3955 | ||
6c71277b | 3956 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3957 | |
840cb59c | 3958 | health_code_update(); |
44a5e5eb | 3959 | |
1d4b027a DG |
3960 | ret = lttcomm_listen_unix_sock(client_sock); |
3961 | if (ret < 0) { | |
35df2755 | 3962 | goto error_listen; |
1d4b027a DG |
3963 | } |
3964 | ||
5eb91c98 DG |
3965 | /* |
3966 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3967 | * more will be added to this poll set. | |
3968 | */ | |
d0b96690 | 3969 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3970 | if (ret < 0) { |
35df2755 | 3971 | goto error_create_poll; |
5eb91c98 | 3972 | } |
273ea72c | 3973 | |
5eb91c98 DG |
3974 | /* Add the application registration socket */ |
3975 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3976 | if (ret < 0) { | |
3977 | goto error; | |
3978 | } | |
273ea72c | 3979 | |
ef367a93 JG |
3980 | sessiond_notify_ready(); |
3981 | ret = sem_post(&load_info->message_thread_ready); | |
3982 | if (ret) { | |
3983 | PERROR("sem_post message_thread_ready"); | |
3984 | goto error; | |
3985 | } | |
0bb7724a | 3986 | |
72453c8c MD |
3987 | /* This testpoint is after we signal readiness to the parent. */ |
3988 | if (testpoint(sessiond_thread_manage_clients)) { | |
3989 | goto error; | |
3990 | } | |
3991 | ||
e547b070 | 3992 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
3993 | goto error; |
3994 | } | |
8ac94142 | 3995 | |
840cb59c | 3996 | health_code_update(); |
44a5e5eb | 3997 | |
1d4b027a | 3998 | while (1) { |
1d4b027a | 3999 | DBG("Accepting client command ..."); |
273ea72c DG |
4000 | |
4001 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4002 | restart: |
a78af745 | 4003 | health_poll_entry(); |
5eb91c98 | 4004 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4005 | health_poll_exit(); |
273ea72c | 4006 | if (ret < 0) { |
88f2b785 MD |
4007 | /* |
4008 | * Restart interrupted system call. | |
4009 | */ | |
4010 | if (errno == EINTR) { | |
4011 | goto restart; | |
4012 | } | |
273ea72c DG |
4013 | goto error; |
4014 | } | |
4015 | ||
0d9c5d77 DG |
4016 | nb_fd = ret; |
4017 | ||
5eb91c98 DG |
4018 | for (i = 0; i < nb_fd; i++) { |
4019 | /* Fetch once the poll data */ | |
4020 | revents = LTTNG_POLL_GETEV(&events, i); | |
4021 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4022 | ||
840cb59c | 4023 | health_code_update(); |
44a5e5eb | 4024 | |
5eb91c98 | 4025 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4026 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4027 | if (ret) { |
139ac872 MD |
4028 | err = 0; |
4029 | goto exit; | |
5eb91c98 DG |
4030 | } |
4031 | ||
4032 | /* Event on the registration socket */ | |
4033 | if (pollfd == client_sock) { | |
4034 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4035 | ERR("Client socket poll error"); | |
4036 | goto error; | |
4037 | } | |
4038 | } | |
4039 | } | |
4040 | ||
4041 | DBG("Wait for client response"); | |
4042 | ||
840cb59c | 4043 | health_code_update(); |
44a5e5eb | 4044 | |
5eb91c98 DG |
4045 | sock = lttcomm_accept_unix_sock(client_sock); |
4046 | if (sock < 0) { | |
273ea72c | 4047 | goto error; |
273ea72c DG |
4048 | } |
4049 | ||
b662582b DG |
4050 | /* |
4051 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4052 | * show must go on. | |
4053 | */ | |
4054 | (void) utils_set_fd_cloexec(sock); | |
4055 | ||
be040666 DG |
4056 | /* Set socket option for credentials retrieval */ |
4057 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4058 | if (ret < 0) { | |
4059 | goto error; | |
4060 | } | |
4061 | ||
5eb91c98 | 4062 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4063 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4064 | if (cmd_ctx == NULL) { |
76d7553f | 4065 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4066 | goto error; |
5eb91c98 | 4067 | } |
1d4b027a | 4068 | |
5eb91c98 | 4069 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4070 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4071 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4072 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4073 | goto error; |
4074 | } | |
1d4b027a | 4075 | |
5eb91c98 DG |
4076 | cmd_ctx->llm = NULL; |
4077 | cmd_ctx->session = NULL; | |
1d4b027a | 4078 | |
840cb59c | 4079 | health_code_update(); |
44a5e5eb | 4080 | |
5eb91c98 DG |
4081 | /* |
4082 | * Data is received from the lttng client. The struct | |
4083 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4084 | * the client. | |
4085 | */ | |
4086 | DBG("Receiving data from client ..."); | |
be040666 DG |
4087 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4088 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4089 | if (ret <= 0) { |
4090 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4091 | ret = close(sock); |
4092 | if (ret) { | |
4093 | PERROR("close"); | |
4094 | } | |
4095 | sock = -1; | |
a2c0da86 | 4096 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4097 | continue; |
4098 | } | |
1d4b027a | 4099 | |
840cb59c | 4100 | health_code_update(); |
44a5e5eb | 4101 | |
5eb91c98 DG |
4102 | // TODO: Validate cmd_ctx including sanity check for |
4103 | // security purpose. | |
f7776ea7 | 4104 | |
f6a9efaa | 4105 | rcu_thread_online(); |
5eb91c98 DG |
4106 | /* |
4107 | * This function dispatch the work to the kernel or userspace tracer | |
4108 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4109 | * informations for the client. The command context struct contains | |
4110 | * everything this function may needs. | |
4111 | */ | |
53a80697 | 4112 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4113 | rcu_thread_offline(); |
5eb91c98 | 4114 | if (ret < 0) { |
36134aa1 DG |
4115 | ret = close(sock); |
4116 | if (ret) { | |
4117 | PERROR("close"); | |
53a80697 | 4118 | } |
36134aa1 | 4119 | sock = -1; |
bbd973c2 | 4120 | /* |
5eb91c98 | 4121 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4122 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4123 | * (ENOMEM). Error detected but still accept |
4124 | * command, unless a socket error has been | |
4125 | * detected. | |
bbd973c2 | 4126 | */ |
bbd973c2 | 4127 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4128 | continue; |
4129 | } | |
d6e4fca4 | 4130 | |
840cb59c | 4131 | health_code_update(); |
44a5e5eb | 4132 | |
54d01ffb DG |
4133 | DBG("Sending response (size: %d, retcode: %s)", |
4134 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4135 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4136 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4137 | if (ret < 0) { |
4138 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4139 | } |
1d4b027a | 4140 | |
5eb91c98 | 4141 | /* End of transmission */ |
76d7553f MD |
4142 | ret = close(sock); |
4143 | if (ret) { | |
4144 | PERROR("close"); | |
4145 | } | |
4146 | sock = -1; | |
be040666 DG |
4147 | |
4148 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4149 | |
840cb59c | 4150 | health_code_update(); |
273ea72c DG |
4151 | } |
4152 | ||
139ac872 | 4153 | exit: |
5eb91c98 | 4154 | error: |
35df2755 CB |
4155 | if (sock >= 0) { |
4156 | ret = close(sock); | |
4157 | if (ret) { | |
4158 | PERROR("close"); | |
4159 | } | |
139ac872 | 4160 | } |
44a5e5eb | 4161 | |
35df2755 CB |
4162 | lttng_poll_clean(&events); |
4163 | clean_command_ctx(&cmd_ctx); | |
4164 | ||
4165 | error_listen: | |
4166 | error_create_poll: | |
273ea72c | 4167 | unlink(client_unix_sock_path); |
76d7553f MD |
4168 | if (client_sock >= 0) { |
4169 | ret = close(client_sock); | |
4170 | if (ret) { | |
4171 | PERROR("close"); | |
4172 | } | |
a4b35e07 | 4173 | } |
35df2755 CB |
4174 | |
4175 | if (err) { | |
840cb59c | 4176 | health_error(); |
35df2755 | 4177 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4178 | } |
273ea72c | 4179 | |
8782cc74 | 4180 | health_unregister(health_sessiond); |
35df2755 CB |
4181 | |
4182 | DBG("Client thread dying"); | |
f6a9efaa DG |
4183 | |
4184 | rcu_unregister_thread(); | |
1d4b027a DG |
4185 | return NULL; |
4186 | } | |
4187 | ||
4188 | ||
fac6795d DG |
4189 | /* |
4190 | * usage function on stderr | |
4191 | */ | |
4192 | static void usage(void) | |
4193 | { | |
b716ce68 | 4194 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4195 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4196 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4197 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4198 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4199 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4200 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4201 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4202 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4203 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4204 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4205 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4206 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4207 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4208 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4209 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4210 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4211 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4212 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4213 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4214 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4215 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4216 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4217 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 4218 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
02425e05 | 4219 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4220 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4221 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
fac6795d DG |
4222 | } |
4223 | ||
4224 | /* | |
26296c48 JG |
4225 | * Take an option from the getopt output and set it in the right variable to be |
4226 | * used later. | |
4227 | * | |
4228 | * Return 0 on success else a negative value. | |
fac6795d | 4229 | */ |
26296c48 | 4230 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4231 | { |
26296c48 | 4232 | int ret = 0; |
fac6795d | 4233 | |
26296c48 JG |
4234 | switch (opt) { |
4235 | case 0: | |
4236 | fprintf(stderr, "option %s", optname); | |
4237 | if (arg) { | |
4238 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4239 | } |
26296c48 JG |
4240 | break; |
4241 | case 'c': | |
4242 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4243 | break; | |
4244 | case 'a': | |
4245 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4246 | break; | |
4247 | case 'd': | |
4248 | opt_daemon = 1; | |
4249 | break; | |
72dd7491 MD |
4250 | case 'b': |
4251 | opt_background = 1; | |
4252 | break; | |
26296c48 | 4253 | case 'g': |
bc32011f JG |
4254 | /* |
4255 | * If the override option is set, the pointer points to a | |
4256 | * *non* const thus freeing it even though the variable type is | |
4257 | * set to const. | |
4258 | */ | |
4259 | if (tracing_group_name_override) { | |
4260 | free((void *) tracing_group_name); | |
4261 | } | |
26296c48 | 4262 | tracing_group_name = strdup(arg); |
a64bbfc0 JG |
4263 | if (!tracing_group_name) { |
4264 | perror("strdup"); | |
4265 | ret = -ENOMEM; | |
4266 | } | |
bc32011f | 4267 | tracing_group_name_override = 1; |
26296c48 JG |
4268 | break; |
4269 | case 'h': | |
4270 | usage(); | |
4271 | exit(EXIT_FAILURE); | |
4272 | case 'V': | |
4273 | fprintf(stdout, "%s\n", VERSION); | |
4274 | exit(EXIT_SUCCESS); | |
4275 | case 'S': | |
4276 | opt_sig_parent = 1; | |
4277 | break; | |
4278 | case 'E': | |
4279 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4280 | break; | |
4281 | case 'C': | |
4282 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4283 | break; | |
4284 | case 'F': | |
4285 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4286 | break; | |
4287 | case 'D': | |
4288 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4289 | break; | |
4290 | case 'H': | |
4291 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4292 | break; | |
4293 | case 'G': | |
4294 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4295 | break; | |
4296 | case 'N': | |
4297 | opt_no_kernel = 1; | |
4298 | break; | |
4299 | case 'q': | |
4300 | lttng_opt_quiet = 1; | |
4301 | break; | |
4302 | case 'v': | |
4303 | /* Verbose level can increase using multiple -v */ | |
4304 | if (arg) { | |
95df5340 | 4305 | /* Value obtained from config file */ |
26296c48 JG |
4306 | lttng_opt_verbose = config_parse_value(arg); |
4307 | } else { | |
95df5340 JG |
4308 | /* -v used on command line */ |
4309 | lttng_opt_verbose++; | |
26296c48 | 4310 | } |
95df5340 JG |
4311 | /* Clamp value to [0, 3] */ |
4312 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4313 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
26296c48 JG |
4314 | break; |
4315 | case 'Z': | |
4316 | if (arg) { | |
4317 | opt_verbose_consumer = config_parse_value(arg); | |
4318 | } else { | |
3bd1e081 | 4319 | opt_verbose_consumer += 1; |
26296c48 JG |
4320 | } |
4321 | break; | |
4322 | case 'u': | |
bc32011f JG |
4323 | if (consumerd32_bin_override) { |
4324 | free((void *) consumerd32_bin); | |
4325 | } | |
26296c48 | 4326 | consumerd32_bin = strdup(arg); |
a64bbfc0 JG |
4327 | if (!consumerd32_bin) { |
4328 | perror("strdup"); | |
4329 | ret = -ENOMEM; | |
4330 | } | |
26296c48 JG |
4331 | consumerd32_bin_override = 1; |
4332 | break; | |
4333 | case 'U': | |
bc32011f JG |
4334 | if (consumerd32_libdir_override) { |
4335 | free((void *) consumerd32_libdir); | |
4336 | } | |
26296c48 | 4337 | consumerd32_libdir = strdup(arg); |
a64bbfc0 JG |
4338 | if (!consumerd32_libdir) { |
4339 | perror("strdup"); | |
4340 | ret = -ENOMEM; | |
4341 | } | |
26296c48 JG |
4342 | consumerd32_libdir_override = 1; |
4343 | break; | |
4344 | case 't': | |
bc32011f JG |
4345 | if (consumerd64_bin_override) { |
4346 | free((void *) consumerd64_bin); | |
4347 | } | |
26296c48 | 4348 | consumerd64_bin = strdup(arg); |
a64bbfc0 JG |
4349 | if (!consumerd64_bin) { |
4350 | perror("strdup"); | |
4351 | ret = -ENOMEM; | |
4352 | } | |
26296c48 JG |
4353 | consumerd64_bin_override = 1; |
4354 | break; | |
4355 | case 'T': | |
bc32011f JG |
4356 | if (consumerd64_libdir_override) { |
4357 | free((void *) consumerd64_libdir); | |
4358 | } | |
26296c48 | 4359 | consumerd64_libdir = strdup(arg); |
a64bbfc0 JG |
4360 | if (!consumerd64_libdir) { |
4361 | perror("strdup"); | |
4362 | ret = -ENOMEM; | |
4363 | } | |
26296c48 JG |
4364 | consumerd64_libdir_override = 1; |
4365 | break; | |
4366 | case 'p': | |
bc32011f | 4367 | free(opt_pidfile); |
26296c48 | 4368 | opt_pidfile = strdup(arg); |
a64bbfc0 JG |
4369 | if (!opt_pidfile) { |
4370 | perror("strdup"); | |
4371 | ret = -ENOMEM; | |
4372 | } | |
26296c48 JG |
4373 | break; |
4374 | case 'J': /* JUL TCP port. */ | |
4375 | { | |
4376 | unsigned long v; | |
4d076222 | 4377 | |
26296c48 JG |
4378 | errno = 0; |
4379 | v = strtoul(arg, NULL, 0); | |
4380 | if (errno != 0 || !isdigit(arg[0])) { | |
4381 | ERR("Wrong value in --jul-tcp-port parameter: %s", arg); | |
4382 | return -1; | |
4383 | } | |
4384 | if (v == 0 || v >= 65535) { | |
4385 | ERR("Port overflow in --jul-tcp-port parameter: %s", arg); | |
4386 | return -1; | |
4387 | } | |
4388 | jul_tcp_port = (uint32_t) v; | |
4389 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4390 | break; | |
4391 | } | |
ef367a93 | 4392 | case 'l': |
bc32011f | 4393 | free(opt_load_session_path); |
ef367a93 JG |
4394 | opt_load_session_path = strdup(arg); |
4395 | if (!opt_load_session_path) { | |
4396 | perror("strdup"); | |
4397 | ret = -ENOMEM; | |
4398 | } | |
4399 | break; | |
fbb9748b | 4400 | case 'P': /* probe modules list */ |
bc32011f | 4401 | free(kmod_probes_list); |
fbb9748b | 4402 | kmod_probes_list = strdup(arg); |
a64bbfc0 JG |
4403 | if (!kmod_probes_list) { |
4404 | perror("strdup"); | |
4405 | ret = -ENOMEM; | |
4406 | } | |
fbb9748b | 4407 | break; |
7ab02a27 DG |
4408 | case 'f': |
4409 | /* This is handled in set_options() thus silent break. */ | |
4410 | break; | |
26296c48 JG |
4411 | default: |
4412 | /* Unknown option or other error. | |
4413 | * Error is printed by getopt, just return */ | |
4414 | ret = -1; | |
4415 | } | |
4416 | ||
4417 | return ret; | |
4418 | } | |
4419 | ||
4420 | /* | |
4421 | * config_entry_handler_cb used to handle options read from a config file. | |
4422 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4423 | * return value conventions. | |
4424 | */ | |
4425 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4426 | { | |
4427 | int ret = 0, i; | |
4428 | ||
4429 | if (!entry || !entry->name || !entry->value) { | |
4430 | ret = -EINVAL; | |
4431 | goto end; | |
4432 | } | |
4433 | ||
4434 | /* Check if the option is to be ignored */ | |
4435 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4436 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4437 | goto end; | |
4438 | } | |
4439 | } | |
4440 | ||
4441 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4442 | i++) { | |
4443 | ||
4444 | /* Ignore if not fully matched. */ | |
4445 | if (strcmp(entry->name, long_options[i].name)) { | |
4446 | continue; | |
4447 | } | |
4448 | ||
4449 | /* | |
4450 | * If the option takes no argument on the command line, we have to | |
4451 | * check if the value is "true". We support non-zero numeric values, | |
4452 | * true, on and yes. | |
4453 | */ | |
4454 | if (!long_options[i].has_arg) { | |
4455 | ret = config_parse_value(entry->value); | |
4456 | if (ret <= 0) { | |
4457 | if (ret) { | |
4458 | WARN("Invalid configuration value \"%s\" for option %s", | |
4459 | entry->value, entry->name); | |
4460 | } | |
4461 | /* False, skip boolean config option. */ | |
4462 | goto end; | |
4d076222 | 4463 | } |
26296c48 JG |
4464 | } |
4465 | ||
4466 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4467 | goto end; | |
4468 | } | |
4469 | ||
4470 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4471 | ||
4472 | end: | |
4473 | return ret; | |
4474 | } | |
4475 | ||
4476 | /* | |
4477 | * daemon configuration loading and argument parsing | |
4478 | */ | |
4479 | static int set_options(int argc, char **argv) | |
4480 | { | |
4481 | int ret = 0, c = 0, option_index = 0; | |
4482 | int orig_optopt = optopt, orig_optind = optind; | |
4483 | char *optstring; | |
4484 | const char *config_path = NULL; | |
4485 | ||
4486 | optstring = utils_generate_optstring(long_options, | |
4487 | sizeof(long_options) / sizeof(struct option)); | |
4488 | if (!optstring) { | |
4489 | ret = -ENOMEM; | |
4490 | goto end; | |
4491 | } | |
4492 | ||
4493 | /* Check for the --config option */ | |
4494 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4495 | &option_index)) != -1) { | |
4496 | if (c == '?') { | |
4497 | ret = -EINVAL; | |
4498 | goto end; | |
4499 | } else if (c != 'f') { | |
4500 | /* if not equal to --config option. */ | |
4501 | continue; | |
4502 | } | |
4503 | ||
4504 | config_path = utils_expand_path(optarg); | |
4505 | if (!config_path) { | |
4506 | ERR("Failed to resolve path: %s", optarg); | |
4507 | } | |
4508 | } | |
4509 | ||
4510 | ret = config_get_section_entries(config_path, config_section_name, | |
4511 | config_entry_handler, NULL); | |
4512 | if (ret) { | |
4513 | if (ret > 0) { | |
4514 | ERR("Invalid configuration option at line %i", ret); | |
4515 | ret = -1; | |
4516 | } | |
4517 | goto end; | |
4518 | } | |
4519 | ||
4520 | /* Reset getopt's global state */ | |
4521 | optopt = orig_optopt; | |
4522 | optind = orig_optind; | |
4523 | while (1) { | |
4524 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4525 | if (c == -1) { | |
4d076222 DG |
4526 | break; |
4527 | } | |
26296c48 JG |
4528 | |
4529 | ret = set_option(c, optarg, long_options[option_index].name); | |
4530 | if (ret < 0) { | |
4531 | break; | |
fac6795d DG |
4532 | } |
4533 | } | |
4534 | ||
26296c48 JG |
4535 | end: |
4536 | free(optstring); | |
4537 | return ret; | |
fac6795d DG |
4538 | } |
4539 | ||
4540 | /* | |
d063d709 | 4541 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4542 | * apps_sock - The communication socket for all UST apps. |
4543 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4544 | */ |
cf3af59e | 4545 | static int init_daemon_socket(void) |
fac6795d DG |
4546 | { |
4547 | int ret = 0; | |
4548 | mode_t old_umask; | |
4549 | ||
4550 | old_umask = umask(0); | |
4551 | ||
4552 | /* Create client tool unix socket */ | |
d6f42150 DG |
4553 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4554 | if (client_sock < 0) { | |
4555 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4556 | ret = -1; |
4557 | goto end; | |
4558 | } | |
4559 | ||
b662582b DG |
4560 | /* Set the cloexec flag */ |
4561 | ret = utils_set_fd_cloexec(client_sock); | |
4562 | if (ret < 0) { | |
4563 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4564 | "Continuing but note that the consumer daemon will have a " | |
4565 | "reference to this socket on exec()", client_sock); | |
4566 | } | |
4567 | ||
fac6795d DG |
4568 | /* File permission MUST be 660 */ |
4569 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4570 | if (ret < 0) { | |
d6f42150 | 4571 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4572 | PERROR("chmod"); |
fac6795d DG |
4573 | goto end; |
4574 | } | |
4575 | ||
4576 | /* Create the application unix socket */ | |
d6f42150 DG |
4577 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4578 | if (apps_sock < 0) { | |
4579 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4580 | ret = -1; |
4581 | goto end; | |
4582 | } | |
4583 | ||
b662582b DG |
4584 | /* Set the cloexec flag */ |
4585 | ret = utils_set_fd_cloexec(apps_sock); | |
4586 | if (ret < 0) { | |
4587 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4588 | "Continuing but note that the consumer daemon will have a " | |
4589 | "reference to this socket on exec()", apps_sock); | |
4590 | } | |
4591 | ||
d6f42150 | 4592 | /* File permission MUST be 666 */ |
54d01ffb DG |
4593 | ret = chmod(apps_unix_sock_path, |
4594 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4595 | if (ret < 0) { |
d6f42150 | 4596 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4597 | PERROR("chmod"); |
fac6795d DG |
4598 | goto end; |
4599 | } | |
4600 | ||
b662582b DG |
4601 | DBG3("Session daemon client socket %d and application socket %d created", |
4602 | client_sock, apps_sock); | |
4603 | ||
fac6795d DG |
4604 | end: |
4605 | umask(old_umask); | |
4606 | return ret; | |
4607 | } | |
4608 | ||
4609 | /* | |
54d01ffb DG |
4610 | * Check if the global socket is available, and if a daemon is answering at the |
4611 | * other side. If yes, error is returned. | |
fac6795d | 4612 | */ |
cf3af59e | 4613 | static int check_existing_daemon(void) |
fac6795d | 4614 | { |
7d8234d9 | 4615 | /* Is there anybody out there ? */ |
099e26bd | 4616 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4617 | return -EEXIST; |
099e26bd | 4618 | } |
b09c7c76 DG |
4619 | |
4620 | return 0; | |
fac6795d DG |
4621 | } |
4622 | ||
fac6795d | 4623 | /* |
d063d709 | 4624 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4625 | * |
d063d709 | 4626 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4627 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4628 | */ |
be040666 | 4629 | static int set_permissions(char *rundir) |
fac6795d DG |
4630 | { |
4631 | int ret; | |
996b65c8 | 4632 | gid_t gid; |
fac6795d | 4633 | |
6c71277b | 4634 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4635 | |
d6f42150 | 4636 | /* Set lttng run dir */ |
be040666 | 4637 | ret = chown(rundir, 0, gid); |
d6f42150 | 4638 | if (ret < 0) { |
be040666 | 4639 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4640 | PERROR("chown"); |
d6f42150 DG |
4641 | } |
4642 | ||
6c71277b MD |
4643 | /* |
4644 | * Ensure all applications and tracing group can search the run | |
4645 | * dir. Allow everyone to read the directory, since it does not | |
4646 | * buy us anything to hide its content. | |
4647 | */ | |
4648 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4649 | if (ret < 0) { |
4650 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4651 | PERROR("chmod"); |
d1613cf5 JN |
4652 | } |
4653 | ||
d6f42150 | 4654 | /* lttng client socket path */ |
996b65c8 | 4655 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4656 | if (ret < 0) { |
d6f42150 | 4657 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4658 | PERROR("chown"); |
d6f42150 DG |
4659 | } |
4660 | ||
3bd1e081 | 4661 | /* kconsumer error socket path */ |
6c71277b | 4662 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4663 | if (ret < 0) { |
3bd1e081 | 4664 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4665 | PERROR("chown"); |
3bd1e081 MD |
4666 | } |
4667 | ||
7753dea8 | 4668 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4669 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4670 | if (ret < 0) { |
4671 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4672 | PERROR("chown"); |
7753dea8 MD |
4673 | } |
4674 | ||
4675 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4676 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4677 | if (ret < 0) { |
7753dea8 | 4678 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4679 | PERROR("chown"); |
fac6795d DG |
4680 | } |
4681 | ||
d6f42150 | 4682 | DBG("All permissions are set"); |
e07ae692 | 4683 | |
fac6795d DG |
4684 | return ret; |
4685 | } | |
4686 | ||
d6f42150 | 4687 | /* |
d063d709 | 4688 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4689 | */ |
67e40797 | 4690 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4691 | { |
4692 | int ret; | |
4693 | ||
67e40797 DG |
4694 | DBG3("Creating LTTng run directory: %s", rundir); |
4695 | ||
d1613cf5 | 4696 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4697 | if (ret < 0) { |
b1f11e69 | 4698 | if (errno != EEXIST) { |
67e40797 | 4699 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4700 | goto error; |
4701 | } else { | |
4702 | ret = 0; | |
4703 | } | |
d6f42150 DG |
4704 | } |
4705 | ||
4706 | error: | |
4707 | return ret; | |
4708 | } | |
4709 | ||
4710 | /* | |
d063d709 DG |
4711 | * Setup sockets and directory needed by the kconsumerd communication with the |
4712 | * session daemon. | |
d6f42150 | 4713 | */ |
67e40797 DG |
4714 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4715 | const char *rundir) | |
d6f42150 DG |
4716 | { |
4717 | int ret; | |
67e40797 | 4718 | char path[PATH_MAX]; |
d6f42150 | 4719 | |
6c71277b | 4720 | switch (consumer_data->type) { |
7753dea8 | 4721 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4722 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4723 | break; |
4724 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4725 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4726 | break; |
4727 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4728 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4729 | break; |
4730 | default: | |
4731 | ERR("Consumer type unknown"); | |
4732 | ret = -EINVAL; | |
4733 | goto error; | |
d6f42150 DG |
4734 | } |
4735 | ||
67e40797 DG |
4736 | DBG2("Creating consumer directory: %s", path); |
4737 | ||
6c71277b | 4738 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4739 | if (ret < 0) { |
6beb2242 | 4740 | if (errno != EEXIST) { |
f11e84c2 | 4741 | PERROR("mkdir"); |
3bd1e081 | 4742 | ERR("Failed to create %s", path); |
6beb2242 DG |
4743 | goto error; |
4744 | } | |
f11e84c2 | 4745 | ret = -1; |
d6f42150 | 4746 | } |
6c71277b MD |
4747 | if (is_root) { |
4748 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4749 | if (ret < 0) { | |
4750 | ERR("Unable to set group on %s", path); | |
4751 | PERROR("chown"); | |
4752 | goto error; | |
4753 | } | |
4754 | } | |
d6f42150 DG |
4755 | |
4756 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4757 | consumer_data->err_sock = |
4758 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4759 | if (consumer_data->err_sock < 0) { | |
4760 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4761 | ret = -1; |
4762 | goto error; | |
4763 | } | |
4764 | ||
a24f05ab MD |
4765 | /* |
4766 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4767 | * show must go on. | |
4768 | */ | |
4769 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4770 | if (ret < 0) { | |
4771 | PERROR("utils_set_fd_cloexec"); | |
4772 | /* continue anyway */ | |
4773 | } | |
4774 | ||
d6f42150 | 4775 | /* File permission MUST be 660 */ |
3bd1e081 | 4776 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4777 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4778 | if (ret < 0) { |
3bd1e081 | 4779 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4780 | PERROR("chmod"); |
d6f42150 DG |
4781 | goto error; |
4782 | } | |
4783 | ||
4784 | error: | |
4785 | return ret; | |
4786 | } | |
4787 | ||
fac6795d | 4788 | /* |
d063d709 | 4789 | * Signal handler for the daemon |
cf3af59e | 4790 | * |
54d01ffb DG |
4791 | * Simply stop all worker threads, leaving main() return gracefully after |
4792 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4793 | */ |
4794 | static void sighandler(int sig) | |
4795 | { | |
4796 | switch (sig) { | |
cf3af59e | 4797 | case SIGPIPE: |
af87c45a | 4798 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4799 | return; |
4800 | case SIGINT: | |
af87c45a | 4801 | DBG("SIGINT caught"); |
cf3af59e MD |
4802 | stop_threads(); |
4803 | break; | |
4804 | case SIGTERM: | |
af87c45a | 4805 | DBG("SIGTERM caught"); |
cf3af59e MD |
4806 | stop_threads(); |
4807 | break; | |
0bb7724a DG |
4808 | case SIGUSR1: |
4809 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4810 | break; | |
cf3af59e MD |
4811 | default: |
4812 | break; | |
fac6795d | 4813 | } |
fac6795d DG |
4814 | } |
4815 | ||
4816 | /* | |
d063d709 | 4817 | * Setup signal handler for : |
1d4b027a | 4818 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4819 | */ |
1d4b027a | 4820 | static int set_signal_handler(void) |
fac6795d | 4821 | { |
1d4b027a DG |
4822 | int ret = 0; |
4823 | struct sigaction sa; | |
4824 | sigset_t sigset; | |
fac6795d | 4825 | |
1d4b027a | 4826 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4827 | PERROR("sigemptyset"); |
1d4b027a DG |
4828 | return ret; |
4829 | } | |
d6f42150 | 4830 | |
1d4b027a DG |
4831 | sa.sa_handler = sighandler; |
4832 | sa.sa_mask = sigset; | |
4833 | sa.sa_flags = 0; | |
4834 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4835 | PERROR("sigaction"); |
1d4b027a | 4836 | return ret; |
d6f42150 DG |
4837 | } |
4838 | ||
1d4b027a | 4839 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4840 | PERROR("sigaction"); |
1d4b027a | 4841 | return ret; |
d6f42150 | 4842 | } |
aaf26714 | 4843 | |
1d4b027a | 4844 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4845 | PERROR("sigaction"); |
1d4b027a | 4846 | return ret; |
8c0faa1d DG |
4847 | } |
4848 | ||
0bb7724a DG |
4849 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4850 | PERROR("sigaction"); | |
4851 | return ret; | |
4852 | } | |
4853 | ||
4854 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4855 | |
4856 | return ret; | |
fac6795d DG |
4857 | } |
4858 | ||
f3ed775e | 4859 | /* |
d063d709 DG |
4860 | * Set open files limit to unlimited. This daemon can open a large number of |
4861 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4862 | */ |
4863 | static void set_ulimit(void) | |
4864 | { | |
4865 | int ret; | |
4866 | struct rlimit lim; | |
4867 | ||
a88df331 | 4868 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4869 | lim.rlim_cur = 65535; |
4870 | lim.rlim_max = 65535; | |
4871 | ||
4872 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4873 | if (ret < 0) { | |
76d7553f | 4874 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4875 | } |
4876 | } | |
4877 | ||
35f90c40 DG |
4878 | /* |
4879 | * Write pidfile using the rundir and opt_pidfile. | |
4880 | */ | |
4881 | static void write_pidfile(void) | |
4882 | { | |
4883 | int ret; | |
4884 | char pidfile_path[PATH_MAX]; | |
4885 | ||
4886 | assert(rundir); | |
4887 | ||
4888 | if (opt_pidfile) { | |
4889 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4890 | } else { | |
4891 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4892 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4893 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4894 | if (ret < 0) { | |
4895 | PERROR("snprintf pidfile path"); | |
4896 | goto error; | |
4897 | } | |
4898 | } | |
4899 | ||
4900 | /* | |
4901 | * Create pid file in rundir. Return value is of no importance. The | |
4902 | * execution will continue even though we are not able to write the file. | |
4903 | */ | |
4904 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4905 | ||
4906 | error: | |
4907 | return; | |
4908 | } | |
4909 | ||
4ef4b5a2 JG |
4910 | /* |
4911 | * Create lockfile using the rundir and return its fd. | |
4912 | */ | |
4913 | static int create_lockfile(void) | |
4914 | { | |
4915 | int ret; | |
4916 | char lockfile_path[PATH_MAX]; | |
4917 | ||
4918 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
4919 | if (ret < 0) { | |
4920 | goto error; | |
4921 | } | |
4922 | ||
4923 | ret = utils_create_lock_file(lockfile_path); | |
4924 | error: | |
4925 | return ret; | |
4926 | } | |
4927 | ||
cd9290dd DG |
4928 | /* |
4929 | * Write JUL TCP port using the rundir. | |
4930 | */ | |
4931 | static void write_julport(void) | |
4932 | { | |
4933 | int ret; | |
4934 | char path[PATH_MAX]; | |
4935 | ||
4936 | assert(rundir); | |
4937 | ||
4938 | ret = snprintf(path, sizeof(path), "%s/" | |
4939 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4940 | if (ret < 0) { | |
4941 | PERROR("snprintf julport path"); | |
4942 | goto error; | |
4943 | } | |
4944 | ||
4945 | /* | |
4946 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4947 | * The execution will continue even though we are not able to write the | |
4948 | * file. | |
4949 | */ | |
4950 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4951 | ||
4952 | error: | |
4953 | return; | |
4954 | } | |
4955 | ||
ef367a93 JG |
4956 | /* |
4957 | * Start the load session thread and dettach from it so the main thread can | |
4958 | * continue. This does not return a value since whatever the outcome, the main | |
4959 | * thread will continue. | |
4960 | */ | |
4961 | static void start_load_session_thread(void) | |
4962 | { | |
4963 | int ret; | |
4964 | ||
4965 | /* Create session loading thread. */ | |
4966 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
4967 | load_info); | |
4968 | if (ret != 0) { | |
4969 | PERROR("pthread_create load_session_thread"); | |
4970 | goto error_create; | |
4971 | } | |
4972 | ||
4973 | ret = pthread_detach(load_session_thread); | |
4974 | if (ret != 0) { | |
4975 | PERROR("pthread_detach load_session_thread"); | |
4976 | } | |
4977 | ||
4978 | /* Everything went well so don't cleanup anything. */ | |
4979 | ||
4980 | error_create: | |
4981 | /* The cleanup() function will destroy the load_info data. */ | |
4982 | return; | |
4983 | } | |
4984 | ||
fac6795d DG |
4985 | /* |
4986 | * main | |
4987 | */ | |
4988 | int main(int argc, char **argv) | |
4989 | { | |
fac6795d DG |
4990 | int ret = 0; |
4991 | void *status; | |
ae9e45b3 | 4992 | const char *home_path, *env_app_timeout; |
fac6795d | 4993 | |
335a95b7 MD |
4994 | init_kernel_workarounds(); |
4995 | ||
f6a9efaa DG |
4996 | rcu_register_thread(); |
4997 | ||
0bb7724a DG |
4998 | if ((ret = set_signal_handler()) < 0) { |
4999 | goto error; | |
5000 | } | |
5001 | ||
7753dea8 | 5002 | setup_consumerd_path(); |
fb09408a | 5003 | |
12744796 DG |
5004 | page_size = sysconf(_SC_PAGESIZE); |
5005 | if (page_size < 0) { | |
5006 | PERROR("sysconf _SC_PAGESIZE"); | |
5007 | page_size = LONG_MAX; | |
5008 | WARN("Fallback page size to %ld", page_size); | |
5009 | } | |
5010 | ||
26296c48 | 5011 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 5012 | progname = argv[0]; |
26296c48 | 5013 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 5014 | goto error; |
fac6795d DG |
5015 | } |
5016 | ||
5017 | /* Daemonize */ | |
72dd7491 | 5018 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5019 | int i; |
5020 | ||
72dd7491 MD |
5021 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5022 | !opt_background); | |
53094c05 | 5023 | if (ret < 0) { |
cf3af59e | 5024 | goto error; |
53094c05 | 5025 | } |
0bb7724a | 5026 | |
ceed52b5 | 5027 | /* |
0bb7724a DG |
5028 | * We are in the child. Make sure all other file descriptors are |
5029 | * closed, in case we are called with more opened file descriptors than | |
5030 | * the standard ones. | |
ceed52b5 MD |
5031 | */ |
5032 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5033 | (void) close(i); | |
5034 | } | |
5035 | } | |
5036 | ||
5037 | /* Create thread quit pipe */ | |
5038 | if ((ret = init_thread_quit_pipe()) < 0) { | |
5039 | goto error; | |
fac6795d DG |
5040 | } |
5041 | ||
5042 | /* Check if daemon is UID = 0 */ | |
5043 | is_root = !getuid(); | |
5044 | ||
fac6795d | 5045 | if (is_root) { |
990570ed | 5046 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
5047 | |
5048 | /* Create global run dir with root access */ | |
5049 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 5050 | if (ret < 0) { |
cf3af59e | 5051 | goto error; |
d6f42150 DG |
5052 | } |
5053 | ||
fac6795d | 5054 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
5055 | snprintf(apps_unix_sock_path, PATH_MAX, |
5056 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
5057 | } |
5058 | ||
5059 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
5060 | snprintf(client_unix_sock_path, PATH_MAX, |
5061 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
5062 | } | |
0fdd1e2c DG |
5063 | |
5064 | /* Set global SHM for ust */ | |
5065 | if (strlen(wait_shm_path) == 0) { | |
5066 | snprintf(wait_shm_path, PATH_MAX, | |
5067 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
5068 | } | |
67e40797 | 5069 | |
44a5e5eb DG |
5070 | if (strlen(health_unix_sock_path) == 0) { |
5071 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5072 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
5073 | } | |
5074 | ||
67e40797 DG |
5075 | /* Setup kernel consumerd path */ |
5076 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5077 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 5078 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5079 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5080 | |
5081 | DBG2("Kernel consumer err path: %s", | |
5082 | kconsumer_data.err_unix_sock_path); | |
5083 | DBG2("Kernel consumer cmd path: %s", | |
5084 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5085 | } else { |
feb0f3e5 | 5086 | home_path = utils_get_home_dir(); |
b082db07 | 5087 | if (home_path == NULL) { |
273ea72c DG |
5088 | /* TODO: Add --socket PATH option */ |
5089 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
5090 | ret = -EPERM; |
5091 | goto error; | |
b082db07 DG |
5092 | } |
5093 | ||
67e40797 DG |
5094 | /* |
5095 | * Create rundir from home path. This will create something like | |
5096 | * $HOME/.lttng | |
5097 | */ | |
990570ed | 5098 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
5099 | if (ret < 0) { |
5100 | ret = -ENOMEM; | |
5101 | goto error; | |
5102 | } | |
5103 | ||
5104 | ret = create_lttng_rundir(rundir); | |
5105 | if (ret < 0) { | |
5106 | goto error; | |
5107 | } | |
5108 | ||
fac6795d | 5109 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 5110 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 5111 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
5112 | } |
5113 | ||
5114 | /* Set the cli tool unix socket path */ | |
5115 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 5116 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 5117 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 5118 | } |
0fdd1e2c DG |
5119 | |
5120 | /* Set global SHM for ust */ | |
5121 | if (strlen(wait_shm_path) == 0) { | |
5122 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 5123 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 5124 | } |
44a5e5eb DG |
5125 | |
5126 | /* Set health check Unix path */ | |
5127 | if (strlen(health_unix_sock_path) == 0) { | |
5128 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5129 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
5130 | } | |
fac6795d DG |
5131 | } |
5132 | ||
4ef4b5a2 JG |
5133 | lockfile_fd = create_lockfile(); |
5134 | if (lockfile_fd < 0) { | |
5135 | goto error; | |
5136 | } | |
5137 | ||
5c827ce0 DG |
5138 | /* Set consumer initial state */ |
5139 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5140 | ust_consumerd_state = CONSUMER_STOPPED; | |
5141 | ||
847177cd DG |
5142 | DBG("Client socket path %s", client_unix_sock_path); |
5143 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5144 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5145 | DBG("LTTng run directory path: %s", rundir); |
5146 | ||
5147 | /* 32 bits consumerd path setup */ | |
5148 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5149 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 5150 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5151 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5152 | |
5153 | DBG2("UST consumer 32 bits err path: %s", | |
5154 | ustconsumer32_data.err_unix_sock_path); | |
5155 | DBG2("UST consumer 32 bits cmd path: %s", | |
5156 | ustconsumer32_data.cmd_unix_sock_path); | |
5157 | ||
5158 | /* 64 bits consumerd path setup */ | |
5159 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5160 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 5161 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5162 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5163 | |
5164 | DBG2("UST consumer 64 bits err path: %s", | |
5165 | ustconsumer64_data.err_unix_sock_path); | |
5166 | DBG2("UST consumer 64 bits cmd path: %s", | |
5167 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5168 | |
273ea72c | 5169 | /* |
7d8234d9 | 5170 | * See if daemon already exist. |
fac6795d | 5171 | */ |
7d8234d9 | 5172 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 5173 | ERR("Already running daemon.\n"); |
273ea72c | 5174 | /* |
cf3af59e MD |
5175 | * We do not goto exit because we must not cleanup() |
5176 | * because a daemon is already running. | |
ab118b20 | 5177 | */ |
cf3af59e | 5178 | goto error; |
a88df331 DG |
5179 | } |
5180 | ||
1427f9b2 DG |
5181 | /* |
5182 | * Init UST app hash table. Alloc hash table before this point since | |
5183 | * cleanup() can get called after that point. | |
5184 | */ | |
5185 | ust_app_ht_alloc(); | |
5186 | ||
f20baf8e DG |
5187 | /* Initialize JUL domain subsystem. */ |
5188 | if ((ret = jul_init()) < 0) { | |
5189 | /* ENOMEM at this point. */ | |
5190 | goto error; | |
5191 | } | |
5192 | ||
54d01ffb | 5193 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
5194 | |
5195 | /* | |
5196 | * These actions must be executed as root. We do that *after* setting up | |
5197 | * the sockets path because we MUST make the check for another daemon using | |
5198 | * those paths *before* trying to set the kernel consumer sockets and init | |
5199 | * kernel tracer. | |
5200 | */ | |
5201 | if (is_root) { | |
67e40797 | 5202 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
5203 | if (ret < 0) { |
5204 | goto exit; | |
5205 | } | |
5206 | ||
a88df331 | 5207 | /* Setup kernel tracer */ |
4fba7219 DG |
5208 | if (!opt_no_kernel) { |
5209 | init_kernel_tracer(); | |
5210 | } | |
a88df331 DG |
5211 | |
5212 | /* Set ulimit for open files */ | |
5213 | set_ulimit(); | |
fac6795d | 5214 | } |
4063050c MD |
5215 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5216 | lttng_fd_init(); | |
fac6795d | 5217 | |
67e40797 DG |
5218 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
5219 | if (ret < 0) { | |
5220 | goto exit; | |
5221 | } | |
5222 | ||
5223 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
5224 | if (ret < 0) { | |
5225 | goto exit; | |
5226 | } | |
5227 | ||
d6f42150 | 5228 | /* Setup the needed unix socket */ |
cf3af59e MD |
5229 | if ((ret = init_daemon_socket()) < 0) { |
5230 | goto exit; | |
fac6795d DG |
5231 | } |
5232 | ||
5233 | /* Set credentials to socket */ | |
be040666 | 5234 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 5235 | goto exit; |
fac6795d DG |
5236 | } |
5237 | ||
5b8719f5 DG |
5238 | /* Get parent pid if -S, --sig-parent is specified. */ |
5239 | if (opt_sig_parent) { | |
5240 | ppid = getppid(); | |
5241 | } | |
5242 | ||
7a485870 | 5243 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
5244 | if (is_root && !opt_no_kernel) { |
5245 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
5246 | goto exit; | |
5247 | } | |
7a485870 DG |
5248 | } |
5249 | ||
0b2dc8df MD |
5250 | /* Setup the thread ht_cleanup communication pipe. */ |
5251 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
5252 | goto exit; | |
5253 | } | |
5254 | ||
099e26bd | 5255 | /* Setup the thread apps communication pipe. */ |
ef599319 | 5256 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
5257 | goto exit; |
5258 | } | |
5259 | ||
d0b96690 DG |
5260 | /* Setup the thread apps notify communication pipe. */ |
5261 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
5262 | goto exit; | |
5263 | } | |
5264 | ||
7972aab2 DG |
5265 | /* Initialize global buffer per UID and PID registry. */ |
5266 | buffer_reg_init_uid_registry(); | |
5267 | buffer_reg_init_pid_registry(); | |
5268 | ||
099e26bd DG |
5269 | /* Init UST command queue. */ |
5270 | cds_wfq_init(&ust_cmd_queue.queue); | |
5271 | ||
273ea72c | 5272 | /* |
54d01ffb DG |
5273 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
5274 | * statically declared in session.c | |
273ea72c | 5275 | */ |
54d01ffb | 5276 | session_list_ptr = session_get_list(); |
b5541356 | 5277 | |
5eb91c98 DG |
5278 | /* Set up max poll set size */ |
5279 | lttng_poll_set_max_size(); | |
5280 | ||
2f77fc4b | 5281 | cmd_init(); |
00e2e675 | 5282 | |
ae9e45b3 DG |
5283 | /* Check for the application socket timeout env variable. */ |
5284 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5285 | if (env_app_timeout) { | |
5286 | app_socket_timeout = atoi(env_app_timeout); | |
5287 | } else { | |
5288 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5289 | } | |
5290 | ||
35f90c40 | 5291 | write_pidfile(); |
cd9290dd | 5292 | write_julport(); |
35f90c40 | 5293 | |
554831e7 MD |
5294 | /* Initialize communication library */ |
5295 | lttcomm_init(); | |
d831c249 DG |
5296 | /* This is to get the TCP timeout value. */ |
5297 | lttcomm_inet_init(); | |
554831e7 | 5298 | |
ef367a93 JG |
5299 | if (load_session_init_data(&load_info) < 0) { |
5300 | goto exit; | |
5301 | } | |
5302 | load_info->path = opt_load_session_path; | |
5303 | ||
67e05644 DG |
5304 | /* |
5305 | * Initialize the health check subsystem. This call should set the | |
5306 | * appropriate time values. | |
5307 | */ | |
6c71277b | 5308 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5309 | if (!health_sessiond) { |
5310 | PERROR("health_app_create error"); | |
5311 | goto exit_health_sessiond_cleanup; | |
5312 | } | |
67e05644 | 5313 | |
d5b9fd2f | 5314 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5315 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5316 | thread_ht_cleanup, (void *) NULL); | |
5317 | if (ret != 0) { | |
5318 | PERROR("pthread_create ht_cleanup"); | |
5319 | goto exit_ht_cleanup; | |
5320 | } | |
5321 | ||
d5b9fd2f | 5322 | /* Create health-check thread */ |
44a5e5eb DG |
5323 | ret = pthread_create(&health_thread, NULL, |
5324 | thread_manage_health, (void *) NULL); | |
5325 | if (ret != 0) { | |
5326 | PERROR("pthread_create health"); | |
5327 | goto exit_health; | |
5328 | } | |
5329 | ||
cf3af59e | 5330 | /* Create thread to manage the client socket */ |
099e26bd DG |
5331 | ret = pthread_create(&client_thread, NULL, |
5332 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5333 | if (ret != 0) { |
76d7553f | 5334 | PERROR("pthread_create clients"); |
cf3af59e MD |
5335 | goto exit_client; |
5336 | } | |
fac6795d | 5337 | |
099e26bd DG |
5338 | /* Create thread to dispatch registration */ |
5339 | ret = pthread_create(&dispatch_thread, NULL, | |
5340 | thread_dispatch_ust_registration, (void *) NULL); | |
5341 | if (ret != 0) { | |
76d7553f | 5342 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5343 | goto exit_dispatch; |
5344 | } | |
5345 | ||
5346 | /* Create thread to manage application registration. */ | |
5347 | ret = pthread_create(®_apps_thread, NULL, | |
5348 | thread_registration_apps, (void *) NULL); | |
5349 | if (ret != 0) { | |
76d7553f | 5350 | PERROR("pthread_create registration"); |
099e26bd DG |
5351 | goto exit_reg_apps; |
5352 | } | |
5353 | ||
cf3af59e | 5354 | /* Create thread to manage application socket */ |
54d01ffb DG |
5355 | ret = pthread_create(&apps_thread, NULL, |
5356 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5357 | if (ret != 0) { |
d0b96690 DG |
5358 | PERROR("pthread_create apps"); |
5359 | goto exit_apps; | |
5360 | } | |
5361 | ||
5362 | /* Create thread to manage application notify socket */ | |
5363 | ret = pthread_create(&apps_notify_thread, NULL, | |
5364 | ust_thread_manage_notify, (void *) NULL); | |
5365 | if (ret != 0) { | |
f5c32ef1 | 5366 | PERROR("pthread_create notify"); |
9563b0ad | 5367 | goto exit_apps_notify; |
cf3af59e | 5368 | } |
fac6795d | 5369 | |
4d076222 DG |
5370 | /* Create JUL registration thread. */ |
5371 | ret = pthread_create(&jul_reg_thread, NULL, | |
5372 | jul_thread_manage_registration, (void *) NULL); | |
5373 | if (ret != 0) { | |
f5c32ef1 | 5374 | PERROR("pthread_create JUL"); |
4d076222 DG |
5375 | goto exit_jul_reg; |
5376 | } | |
5377 | ||
6620da75 DG |
5378 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5379 | if (is_root && !opt_no_kernel) { | |
5380 | /* Create kernel thread to manage kernel event */ | |
5381 | ret = pthread_create(&kernel_thread, NULL, | |
5382 | thread_manage_kernel, (void *) NULL); | |
5383 | if (ret != 0) { | |
5384 | PERROR("pthread_create kernel"); | |
5385 | goto exit_kernel; | |
5386 | } | |
ef367a93 | 5387 | } |
7a485870 | 5388 | |
ef367a93 JG |
5389 | /* Load possible session(s). */ |
5390 | start_load_session_thread(); | |
5391 | ||
5392 | if (is_root && !opt_no_kernel) { | |
6620da75 DG |
5393 | ret = pthread_join(kernel_thread, &status); |
5394 | if (ret != 0) { | |
5395 | PERROR("pthread_join"); | |
5396 | goto error; /* join error, exit without cleanup */ | |
5397 | } | |
fac6795d DG |
5398 | } |
5399 | ||
cf3af59e | 5400 | exit_kernel: |
4d076222 DG |
5401 | ret = pthread_join(jul_reg_thread, &status); |
5402 | if (ret != 0) { | |
5403 | PERROR("pthread_join JUL"); | |
5404 | goto error; /* join error, exit without cleanup */ | |
5405 | } | |
5406 | ||
5407 | exit_jul_reg: | |
9563b0ad DG |
5408 | ret = pthread_join(apps_notify_thread, &status); |
5409 | if (ret != 0) { | |
5410 | PERROR("pthread_join apps notify"); | |
5411 | goto error; /* join error, exit without cleanup */ | |
5412 | } | |
5413 | ||
5414 | exit_apps_notify: | |
cf3af59e MD |
5415 | ret = pthread_join(apps_thread, &status); |
5416 | if (ret != 0) { | |
9563b0ad | 5417 | PERROR("pthread_join apps"); |
cf3af59e MD |
5418 | goto error; /* join error, exit without cleanup */ |
5419 | } | |
fac6795d | 5420 | |
4ccd8c8f | 5421 | |
cf3af59e | 5422 | exit_apps: |
099e26bd DG |
5423 | ret = pthread_join(reg_apps_thread, &status); |
5424 | if (ret != 0) { | |
76d7553f | 5425 | PERROR("pthread_join"); |
099e26bd DG |
5426 | goto error; /* join error, exit without cleanup */ |
5427 | } | |
5428 | ||
5429 | exit_reg_apps: | |
5430 | ret = pthread_join(dispatch_thread, &status); | |
5431 | if (ret != 0) { | |
76d7553f | 5432 | PERROR("pthread_join"); |
099e26bd DG |
5433 | goto error; /* join error, exit without cleanup */ |
5434 | } | |
5435 | ||
5436 | exit_dispatch: | |
cf3af59e MD |
5437 | ret = pthread_join(client_thread, &status); |
5438 | if (ret != 0) { | |
76d7553f | 5439 | PERROR("pthread_join"); |
cf3af59e MD |
5440 | goto error; /* join error, exit without cleanup */ |
5441 | } | |
5442 | ||
3bd1e081 | 5443 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5444 | if (ret != 0) { |
76d7553f | 5445 | PERROR("join_consumer"); |
cf3af59e MD |
5446 | goto error; /* join error, exit without cleanup */ |
5447 | } | |
a88df331 | 5448 | |
06f525de DG |
5449 | ret = join_consumer_thread(&ustconsumer32_data); |
5450 | if (ret != 0) { | |
5451 | PERROR("join_consumer ust32"); | |
5452 | goto error; /* join error, exit without cleanup */ | |
5453 | } | |
5454 | ||
5455 | ret = join_consumer_thread(&ustconsumer64_data); | |
5456 | if (ret != 0) { | |
5457 | PERROR("join_consumer ust64"); | |
5458 | goto error; /* join error, exit without cleanup */ | |
5459 | } | |
5460 | ||
cf3af59e | 5461 | exit_client: |
06f525de DG |
5462 | ret = pthread_join(health_thread, &status); |
5463 | if (ret != 0) { | |
5464 | PERROR("pthread_join health thread"); | |
5465 | goto error; /* join error, exit without cleanup */ | |
5466 | } | |
5467 | ||
44a5e5eb | 5468 | exit_health: |
0b2dc8df MD |
5469 | ret = pthread_join(ht_cleanup_thread, &status); |
5470 | if (ret != 0) { | |
5471 | PERROR("pthread_join ht cleanup thread"); | |
5472 | goto error; /* join error, exit without cleanup */ | |
5473 | } | |
5474 | exit_ht_cleanup: | |
8782cc74 MD |
5475 | health_app_destroy(health_sessiond); |
5476 | exit_health_sessiond_cleanup: | |
a88df331 | 5477 | exit: |
cf3af59e MD |
5478 | /* |
5479 | * cleanup() is called when no other thread is running. | |
5480 | */ | |
f6a9efaa | 5481 | rcu_thread_online(); |
cf3af59e | 5482 | cleanup(); |
f6a9efaa DG |
5483 | rcu_thread_offline(); |
5484 | rcu_unregister_thread(); | |
67e40797 | 5485 | if (!ret) { |
cf3af59e | 5486 | exit(EXIT_SUCCESS); |
67e40797 | 5487 | } |
cf3af59e | 5488 | error: |
5e16da05 | 5489 | exit(EXIT_FAILURE); |
fac6795d | 5490 | } |