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 | ||
3628d5bd | 1002 | DBG("Thread kernel polling"); |
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); |
3628d5bd MD |
1008 | DBG("Thread kernel return from poll on %d fds", |
1009 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1010 | health_poll_exit(); |
7a485870 | 1011 | if (ret < 0) { |
88f2b785 MD |
1012 | /* |
1013 | * Restart interrupted system call. | |
1014 | */ | |
1015 | if (errno == EINTR) { | |
1016 | goto restart; | |
1017 | } | |
7a485870 DG |
1018 | goto error; |
1019 | } else if (ret == 0) { | |
1020 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1021 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1022 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1023 | continue; |
1024 | } | |
1025 | ||
0d9c5d77 DG |
1026 | nb_fd = ret; |
1027 | ||
5eb91c98 DG |
1028 | for (i = 0; i < nb_fd; i++) { |
1029 | /* Fetch once the poll data */ | |
1030 | revents = LTTNG_POLL_GETEV(&events, i); | |
1031 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1032 | |
840cb59c | 1033 | health_code_update(); |
44a5e5eb | 1034 | |
6550503d MD |
1035 | if (!revents) { |
1036 | /* No activity for this FD (poll implementation). */ | |
1037 | continue; | |
1038 | } | |
1039 | ||
5eb91c98 | 1040 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1041 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1042 | if (ret) { |
139ac872 MD |
1043 | err = 0; |
1044 | goto exit; | |
5eb91c98 | 1045 | } |
7a485870 | 1046 | |
5eb91c98 DG |
1047 | /* Check for data on kernel pipe */ |
1048 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
1049 | (void) lttng_read(kernel_poll_pipe[0], |
1050 | &tmp, 1); | |
f921c78f DG |
1051 | /* |
1052 | * Ret value is useless here, if this pipe gets any actions an | |
1053 | * update is required anyway. | |
1054 | */ | |
5eb91c98 DG |
1055 | update_poll_flag = 1; |
1056 | continue; | |
1057 | } else { | |
1058 | /* | |
1059 | * New CPU detected by the kernel. Adding kernel stream to | |
1060 | * kernel session and updating the kernel consumer | |
1061 | */ | |
1062 | if (revents & LPOLLIN) { | |
2bdd86d4 | 1063 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1064 | if (ret < 0) { |
1065 | continue; | |
1066 | } | |
1067 | break; | |
1068 | /* | |
1069 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
1070 | * and unregister kernel stream at this point. | |
1071 | */ | |
7a485870 | 1072 | } |
7a485870 DG |
1073 | } |
1074 | } | |
1075 | } | |
1076 | ||
139ac872 | 1077 | exit: |
7a485870 | 1078 | error: |
5eb91c98 | 1079 | lttng_poll_clean(&events); |
76d7553f | 1080 | error_poll_create: |
6993eeb3 | 1081 | error_testpoint: |
6620da75 DG |
1082 | utils_close_pipe(kernel_poll_pipe); |
1083 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1084 | if (err) { |
840cb59c | 1085 | health_error(); |
139ac872 | 1086 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1087 | WARN("Kernel thread died unexpectedly. " |
1088 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1089 | } |
8782cc74 | 1090 | health_unregister(health_sessiond); |
76d7553f | 1091 | DBG("Kernel thread dying"); |
7a485870 DG |
1092 | return NULL; |
1093 | } | |
1094 | ||
a23ec3a7 DG |
1095 | /* |
1096 | * Signal pthread condition of the consumer data that the thread. | |
1097 | */ | |
1098 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1099 | { | |
1100 | pthread_mutex_lock(&data->cond_mutex); | |
1101 | ||
1102 | /* | |
1103 | * The state is set before signaling. It can be any value, it's the waiter | |
1104 | * job to correctly interpret this condition variable associated to the | |
1105 | * consumer pthread_cond. | |
1106 | * | |
1107 | * A value of 0 means that the corresponding thread of the consumer data | |
1108 | * was not started. 1 indicates that the thread has started and is ready | |
1109 | * for action. A negative value means that there was an error during the | |
1110 | * thread bootstrap. | |
1111 | */ | |
1112 | data->consumer_thread_is_ready = state; | |
1113 | (void) pthread_cond_signal(&data->cond); | |
1114 | ||
1115 | pthread_mutex_unlock(&data->cond_mutex); | |
1116 | } | |
1117 | ||
1d4b027a | 1118 | /* |
3bd1e081 | 1119 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1120 | */ |
3bd1e081 | 1121 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1122 | { |
659d22db | 1123 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1124 | uint32_t revents, nb_fd; |
1d4b027a | 1125 | enum lttcomm_return_code code; |
5eb91c98 | 1126 | struct lttng_poll_event events; |
3bd1e081 | 1127 | struct consumer_data *consumer_data = data; |
1d4b027a | 1128 | |
3bd1e081 | 1129 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1130 | |
6c71277b | 1131 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1132 | |
855060f8 | 1133 | health_code_update(); |
9449cc75 | 1134 | |
5eb91c98 | 1135 | /* |
331744e3 JD |
1136 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1137 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1138 | */ |
331744e3 | 1139 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1140 | if (ret < 0) { |
76d7553f | 1141 | goto error_poll; |
5eb91c98 | 1142 | } |
273ea72c | 1143 | |
edb8b045 DG |
1144 | /* |
1145 | * The error socket here is already in a listening state which was done | |
1146 | * just before spawning this thread to avoid a race between the consumer | |
1147 | * daemon exec trying to connect and the listen() call. | |
1148 | */ | |
3bd1e081 | 1149 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1150 | if (ret < 0) { |
1151 | goto error; | |
1152 | } | |
1153 | ||
840cb59c | 1154 | health_code_update(); |
44a5e5eb | 1155 | |
331744e3 | 1156 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1157 | restart: |
a78af745 | 1158 | health_poll_entry(); |
8ac94142 | 1159 | |
e547b070 | 1160 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1161 | goto error; |
1162 | } | |
8ac94142 | 1163 | |
5eb91c98 | 1164 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1165 | health_poll_exit(); |
273ea72c | 1166 | if (ret < 0) { |
88f2b785 MD |
1167 | /* |
1168 | * Restart interrupted system call. | |
1169 | */ | |
1170 | if (errno == EINTR) { | |
1171 | goto restart; | |
1172 | } | |
273ea72c DG |
1173 | goto error; |
1174 | } | |
1175 | ||
0d9c5d77 DG |
1176 | nb_fd = ret; |
1177 | ||
5eb91c98 DG |
1178 | for (i = 0; i < nb_fd; i++) { |
1179 | /* Fetch once the poll data */ | |
1180 | revents = LTTNG_POLL_GETEV(&events, i); | |
1181 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1182 | ||
840cb59c | 1183 | health_code_update(); |
44a5e5eb | 1184 | |
6550503d MD |
1185 | if (!revents) { |
1186 | /* No activity for this FD (poll implementation). */ | |
1187 | continue; | |
1188 | } | |
1189 | ||
5eb91c98 | 1190 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1191 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1192 | if (ret) { |
139ac872 MD |
1193 | err = 0; |
1194 | goto exit; | |
5eb91c98 DG |
1195 | } |
1196 | ||
1197 | /* Event on the registration socket */ | |
3bd1e081 | 1198 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1199 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1200 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1201 | goto error; |
1202 | } | |
1203 | } | |
273ea72c DG |
1204 | } |
1205 | ||
3bd1e081 | 1206 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1207 | if (sock < 0) { |
1208 | goto error; | |
1209 | } | |
1210 | ||
b662582b DG |
1211 | /* |
1212 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1213 | * show must go on. | |
1214 | */ | |
1215 | (void) utils_set_fd_cloexec(sock); | |
1216 | ||
840cb59c | 1217 | health_code_update(); |
44a5e5eb | 1218 | |
3bd1e081 | 1219 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1220 | |
712ea556 | 1221 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1222 | ret = lttcomm_recv_unix_sock(sock, &code, |
1223 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1224 | if (ret <= 0) { |
1225 | goto error; | |
1226 | } | |
1227 | ||
840cb59c | 1228 | health_code_update(); |
f73fabfd | 1229 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1230 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1231 | consumer_data->cmd_sock = |
1232 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1233 | consumer_data->metadata_fd = |
331744e3 | 1234 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1235 | if (consumer_data->cmd_sock < 0 |
1236 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1237 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1238 | /* On error, signal condition and quit. */ |
1239 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1240 | goto error; |
1241 | } | |
9363801e | 1242 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1243 | /* Create metadata socket lock. */ |
1244 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1245 | if (consumer_data->metadata_sock.lock == NULL) { | |
1246 | PERROR("zmalloc pthread mutex"); | |
1247 | ret = -1; | |
1248 | goto error; | |
1249 | } | |
1250 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1251 | ||
a23ec3a7 | 1252 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1253 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1254 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1255 | consumer_data->metadata_fd); |
1d4b027a | 1256 | } else { |
3bd1e081 | 1257 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1258 | lttcomm_get_readable_code(-code)); |
1259 | goto error; | |
1260 | } | |
1261 | ||
331744e3 | 1262 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1263 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1264 | if (ret < 0) { |
72079cae DG |
1265 | goto error; |
1266 | } | |
1267 | ||
331744e3 | 1268 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1269 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1270 | if (ret < 0) { | |
72079cae | 1271 | goto error; |
5eb91c98 DG |
1272 | } |
1273 | ||
331744e3 | 1274 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1275 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1276 | LPOLLIN | LPOLLRDHUP); |
1277 | if (ret < 0) { | |
1278 | goto error; | |
1279 | } | |
1280 | ||
840cb59c | 1281 | health_code_update(); |
44a5e5eb | 1282 | |
331744e3 | 1283 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1284 | restart_poll: |
331744e3 | 1285 | while (1) { |
659d22db DG |
1286 | health_code_update(); |
1287 | ||
1288 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1289 | if (should_quit) { | |
1290 | /* Not a health error. */ | |
1291 | err = 0; | |
1292 | goto exit; | |
1293 | } | |
1294 | ||
331744e3 JD |
1295 | health_poll_entry(); |
1296 | ret = lttng_poll_wait(&events, -1); | |
1297 | health_poll_exit(); | |
1298 | if (ret < 0) { | |
1299 | /* | |
1300 | * Restart interrupted system call. | |
1301 | */ | |
1302 | if (errno == EINTR) { | |
1303 | goto restart_poll; | |
1304 | } | |
1305 | goto error; | |
88f2b785 | 1306 | } |
72079cae | 1307 | |
331744e3 | 1308 | nb_fd = ret; |
0d9c5d77 | 1309 | |
331744e3 JD |
1310 | for (i = 0; i < nb_fd; i++) { |
1311 | /* Fetch once the poll data */ | |
1312 | revents = LTTNG_POLL_GETEV(&events, i); | |
1313 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1314 | |
331744e3 | 1315 | health_code_update(); |
44a5e5eb | 1316 | |
6550503d MD |
1317 | if (!revents) { |
1318 | /* No activity for this FD (poll implementation). */ | |
1319 | continue; | |
1320 | } | |
1321 | ||
659d22db DG |
1322 | /* |
1323 | * Thread quit pipe has been triggered, flag that we should stop | |
1324 | * but continue the current loop to handle potential data from | |
1325 | * consumer. | |
1326 | */ | |
1327 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1328 | |
331744e3 JD |
1329 | if (pollfd == sock) { |
1330 | /* Event on the consumerd socket */ | |
1331 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1332 | ERR("consumer err socket second poll error"); | |
1333 | goto error; | |
1334 | } | |
1335 | health_code_update(); | |
1336 | /* Wait for any kconsumerd error */ | |
1337 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1338 | sizeof(enum lttcomm_return_code)); | |
1339 | if (ret <= 0) { | |
1340 | ERR("consumer closed the command socket"); | |
1341 | goto error; | |
1342 | } | |
1343 | ||
1344 | ERR("consumer return code : %s", | |
1345 | lttcomm_get_readable_code(-code)); | |
1346 | ||
1347 | goto exit; | |
4ce514c4 | 1348 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1349 | /* UST metadata requests */ |
1350 | ret = ust_consumer_metadata_request( | |
1351 | &consumer_data->metadata_sock); | |
1352 | if (ret < 0) { | |
1353 | ERR("Handling metadata request"); | |
1354 | goto error; | |
1355 | } | |
5eb91c98 | 1356 | } |
659d22db | 1357 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1358 | } |
331744e3 | 1359 | health_code_update(); |
5eb91c98 DG |
1360 | } |
1361 | ||
139ac872 | 1362 | exit: |
1d4b027a | 1363 | error: |
fdadac08 DG |
1364 | /* |
1365 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1366 | * thread might be using them so get exclusive access which will abort all |
1367 | * other consumer command by other threads. | |
fdadac08 DG |
1368 | */ |
1369 | pthread_mutex_lock(&consumer_data->lock); | |
1370 | ||
5c827ce0 DG |
1371 | /* Immediately set the consumerd state to stopped */ |
1372 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1373 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1374 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1375 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1376 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1377 | } else { | |
1378 | /* Code flow error... */ | |
1379 | assert(0); | |
1380 | } | |
1381 | ||
76d7553f MD |
1382 | if (consumer_data->err_sock >= 0) { |
1383 | ret = close(consumer_data->err_sock); | |
1384 | if (ret) { | |
1385 | PERROR("close"); | |
1386 | } | |
a76cbd9f | 1387 | consumer_data->err_sock = -1; |
76d7553f MD |
1388 | } |
1389 | if (consumer_data->cmd_sock >= 0) { | |
1390 | ret = close(consumer_data->cmd_sock); | |
1391 | if (ret) { | |
1392 | PERROR("close"); | |
1393 | } | |
a76cbd9f | 1394 | consumer_data->cmd_sock = -1; |
76d7553f | 1395 | } |
96544455 SS |
1396 | if (consumer_data->metadata_sock.fd_ptr && |
1397 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1398 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1399 | if (ret) { |
1400 | PERROR("close"); | |
1401 | } | |
1402 | } | |
76d7553f MD |
1403 | if (sock >= 0) { |
1404 | ret = close(sock); | |
1405 | if (ret) { | |
1406 | PERROR("close"); | |
1407 | } | |
1408 | } | |
273ea72c | 1409 | |
3bd1e081 MD |
1410 | unlink(consumer_data->err_unix_sock_path); |
1411 | unlink(consumer_data->cmd_unix_sock_path); | |
1412 | consumer_data->pid = 0; | |
fdadac08 | 1413 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1414 | |
fdadac08 | 1415 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1416 | if (consumer_data->metadata_sock.lock) { |
1417 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1418 | free(consumer_data->metadata_sock.lock); | |
1419 | } | |
5eb91c98 | 1420 | lttng_poll_clean(&events); |
76d7553f | 1421 | error_poll: |
139ac872 | 1422 | if (err) { |
840cb59c | 1423 | health_error(); |
139ac872 MD |
1424 | ERR("Health error occurred in %s", __func__); |
1425 | } | |
8782cc74 | 1426 | health_unregister(health_sessiond); |
76d7553f | 1427 | DBG("consumer thread cleanup completed"); |
0177d773 | 1428 | |
5eb91c98 | 1429 | return NULL; |
099e26bd DG |
1430 | } |
1431 | ||
099e26bd DG |
1432 | /* |
1433 | * This thread manage application communication. | |
1d4b027a DG |
1434 | */ |
1435 | static void *thread_manage_apps(void *data) | |
099e26bd | 1436 | { |
139ac872 | 1437 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1438 | ssize_t size_ret; |
5eb91c98 | 1439 | uint32_t revents, nb_fd; |
5eb91c98 | 1440 | struct lttng_poll_event events; |
099e26bd DG |
1441 | |
1442 | DBG("[thread] Manage application started"); | |
1443 | ||
f6a9efaa DG |
1444 | rcu_register_thread(); |
1445 | rcu_thread_online(); | |
1446 | ||
6c71277b | 1447 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1448 | |
e547b070 | 1449 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1450 | goto error_testpoint; |
1451 | } | |
1452 | ||
840cb59c | 1453 | health_code_update(); |
44a5e5eb | 1454 | |
d0b96690 | 1455 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1456 | if (ret < 0) { |
76d7553f | 1457 | goto error_poll_create; |
5eb91c98 | 1458 | } |
099e26bd | 1459 | |
5eb91c98 DG |
1460 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1461 | if (ret < 0) { | |
1462 | goto error; | |
1463 | } | |
099e26bd | 1464 | |
e547b070 | 1465 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1466 | goto error; |
1467 | } | |
8ac94142 | 1468 | |
840cb59c | 1469 | health_code_update(); |
44a5e5eb | 1470 | |
5eb91c98 | 1471 | while (1) { |
3628d5bd | 1472 | DBG("Apps thread polling"); |
099e26bd DG |
1473 | |
1474 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1475 | restart: |
a78af745 | 1476 | health_poll_entry(); |
5eb91c98 | 1477 | ret = lttng_poll_wait(&events, -1); |
3628d5bd MD |
1478 | DBG("Apps thread return from poll on %d fds", |
1479 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1480 | health_poll_exit(); |
099e26bd | 1481 | if (ret < 0) { |
88f2b785 MD |
1482 | /* |
1483 | * Restart interrupted system call. | |
1484 | */ | |
1485 | if (errno == EINTR) { | |
1486 | goto restart; | |
1487 | } | |
099e26bd DG |
1488 | goto error; |
1489 | } | |
1490 | ||
0d9c5d77 DG |
1491 | nb_fd = ret; |
1492 | ||
5eb91c98 DG |
1493 | for (i = 0; i < nb_fd; i++) { |
1494 | /* Fetch once the poll data */ | |
1495 | revents = LTTNG_POLL_GETEV(&events, i); | |
1496 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1497 | ||
840cb59c | 1498 | health_code_update(); |
44a5e5eb | 1499 | |
6550503d MD |
1500 | if (!revents) { |
1501 | /* No activity for this FD (poll implementation). */ | |
1502 | continue; | |
1503 | } | |
1504 | ||
5eb91c98 | 1505 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1506 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1507 | if (ret) { |
139ac872 MD |
1508 | err = 0; |
1509 | goto exit; | |
5eb91c98 | 1510 | } |
099e26bd | 1511 | |
5eb91c98 DG |
1512 | /* Inspect the apps cmd pipe */ |
1513 | if (pollfd == apps_cmd_pipe[0]) { | |
1514 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1515 | ERR("Apps command pipe error"); | |
0177d773 | 1516 | goto error; |
5eb91c98 | 1517 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1518 | int sock; |
1519 | ||
5eb91c98 | 1520 | /* Empty pipe */ |
6cd525e8 MD |
1521 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1522 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1523 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1524 | goto error; |
1525 | } | |
099e26bd | 1526 | |
840cb59c | 1527 | health_code_update(); |
44a5e5eb | 1528 | |
ffe60014 | 1529 | /* |
d0b96690 DG |
1530 | * We only monitor the error events of the socket. This |
1531 | * thread does not handle any incoming data from UST | |
1532 | * (POLLIN). | |
ffe60014 | 1533 | */ |
d0b96690 DG |
1534 | ret = lttng_poll_add(&events, sock, |
1535 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1536 | if (ret < 0) { | |
5eb91c98 | 1537 | goto error; |
e0c7ec2b | 1538 | } |
acc7b41b | 1539 | |
d0b96690 | 1540 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1541 | } |
5eb91c98 DG |
1542 | } else { |
1543 | /* | |
54d01ffb DG |
1544 | * At this point, we know that a registered application made |
1545 | * the event at poll_wait. | |
5eb91c98 DG |
1546 | */ |
1547 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1548 | /* Removing from the poll set */ | |
1549 | ret = lttng_poll_del(&events, pollfd); | |
1550 | if (ret < 0) { | |
1551 | goto error; | |
1552 | } | |
099e26bd | 1553 | |
b9d9b220 | 1554 | /* Socket closed on remote end. */ |
56fff090 | 1555 | ust_app_unregister(pollfd); |
5eb91c98 | 1556 | } |
099e26bd | 1557 | } |
44a5e5eb | 1558 | |
840cb59c | 1559 | health_code_update(); |
099e26bd | 1560 | } |
099e26bd DG |
1561 | } |
1562 | ||
139ac872 | 1563 | exit: |
099e26bd | 1564 | error: |
5eb91c98 | 1565 | lttng_poll_clean(&events); |
76d7553f | 1566 | error_poll_create: |
6993eeb3 | 1567 | error_testpoint: |
6620da75 DG |
1568 | utils_close_pipe(apps_cmd_pipe); |
1569 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1570 | ||
1571 | /* | |
1572 | * We don't clean the UST app hash table here since already registered | |
1573 | * applications can still be controlled so let them be until the session | |
1574 | * daemon dies or the applications stop. | |
1575 | */ | |
1576 | ||
139ac872 | 1577 | if (err) { |
840cb59c | 1578 | health_error(); |
139ac872 MD |
1579 | ERR("Health error occurred in %s", __func__); |
1580 | } | |
8782cc74 | 1581 | health_unregister(health_sessiond); |
76d7553f | 1582 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1583 | rcu_thread_offline(); |
1584 | rcu_unregister_thread(); | |
099e26bd DG |
1585 | return NULL; |
1586 | } | |
1587 | ||
d0b96690 | 1588 | /* |
d88aee68 DG |
1589 | * Send a socket to a thread This is called from the dispatch UST registration |
1590 | * thread once all sockets are set for the application. | |
d0b96690 | 1591 | * |
b85dc84c DG |
1592 | * The sock value can be invalid, we don't really care, the thread will handle |
1593 | * it and make the necessary cleanup if so. | |
1594 | * | |
d0b96690 DG |
1595 | * On success, return 0 else a negative value being the errno message of the |
1596 | * write(). | |
1597 | */ | |
d88aee68 | 1598 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1599 | { |
6cd525e8 | 1600 | ssize_t ret; |
d0b96690 | 1601 | |
b85dc84c DG |
1602 | /* |
1603 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1604 | * before calling this function being a shutdown state of the thread. | |
1605 | */ | |
1606 | if (fd < 0) { | |
1607 | ret = -EBADF; | |
1608 | goto error; | |
1609 | } | |
d0b96690 | 1610 | |
6cd525e8 MD |
1611 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1612 | if (ret < sizeof(sock)) { | |
d88aee68 | 1613 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1614 | if (ret < 0) { |
1615 | ret = -errno; | |
1616 | } | |
1617 | goto error; | |
1618 | } | |
1619 | ||
1620 | /* All good. Don't send back the write positive ret value. */ | |
1621 | ret = 0; | |
1622 | error: | |
6cd525e8 | 1623 | return (int) ret; |
d0b96690 DG |
1624 | } |
1625 | ||
f45e313d DG |
1626 | /* |
1627 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1628 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1629 | * notify socket is never received. | |
1630 | */ | |
1631 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1632 | { | |
1633 | int ret, nb_fd = 0, i; | |
1634 | unsigned int fd_added = 0; | |
1635 | struct lttng_poll_event events; | |
1636 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1637 | ||
1638 | assert(wait_queue); | |
1639 | ||
1640 | lttng_poll_init(&events); | |
1641 | ||
1642 | /* Just skip everything for an empty queue. */ | |
1643 | if (!wait_queue->count) { | |
1644 | goto end; | |
1645 | } | |
1646 | ||
1647 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1648 | if (ret < 0) { | |
1649 | goto error_create; | |
1650 | } | |
1651 | ||
1652 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1653 | &wait_queue->head, head) { | |
1654 | assert(wait_node->app); | |
1655 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1656 | LPOLLHUP | LPOLLERR); | |
1657 | if (ret < 0) { | |
1658 | goto error; | |
1659 | } | |
1660 | ||
1661 | fd_added = 1; | |
1662 | } | |
1663 | ||
1664 | if (!fd_added) { | |
1665 | goto end; | |
1666 | } | |
1667 | ||
1668 | /* | |
1669 | * Poll but don't block so we can quickly identify the faulty events and | |
1670 | * clean them afterwards from the wait queue. | |
1671 | */ | |
1672 | ret = lttng_poll_wait(&events, 0); | |
1673 | if (ret < 0) { | |
1674 | goto error; | |
1675 | } | |
1676 | nb_fd = ret; | |
1677 | ||
1678 | for (i = 0; i < nb_fd; i++) { | |
1679 | /* Get faulty FD. */ | |
1680 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1681 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1682 | ||
6550503d MD |
1683 | if (!revents) { |
1684 | /* No activity for this FD (poll implementation). */ | |
1685 | continue; | |
1686 | } | |
1687 | ||
f45e313d DG |
1688 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1689 | &wait_queue->head, head) { | |
1690 | if (pollfd == wait_node->app->sock && | |
1691 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1692 | cds_list_del(&wait_node->head); | |
1693 | wait_queue->count--; | |
1694 | ust_app_destroy(wait_node->app); | |
1695 | free(wait_node); | |
1696 | break; | |
1697 | } | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | if (nb_fd > 0) { | |
1702 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1703 | } | |
1704 | ||
1705 | end: | |
1706 | lttng_poll_clean(&events); | |
1707 | return; | |
1708 | ||
1709 | error: | |
1710 | lttng_poll_clean(&events); | |
1711 | error_create: | |
1712 | ERR("Unable to sanitize wait queue"); | |
1713 | return; | |
1714 | } | |
1715 | ||
099e26bd DG |
1716 | /* |
1717 | * Dispatch request from the registration threads to the application | |
1718 | * communication thread. | |
1719 | */ | |
1720 | static void *thread_dispatch_ust_registration(void *data) | |
1721 | { | |
12e2b881 | 1722 | int ret, err = -1; |
099e26bd DG |
1723 | struct cds_wfq_node *node; |
1724 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1725 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1726 | struct ust_reg_wait_queue wait_queue = { | |
1727 | .count = 0, | |
1728 | }; | |
d0b96690 | 1729 | |
6c71277b | 1730 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1731 | |
9ad42ec1 MD |
1732 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1733 | goto error_testpoint; | |
1734 | } | |
1735 | ||
12e2b881 MD |
1736 | health_code_update(); |
1737 | ||
f45e313d | 1738 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1739 | |
1740 | DBG("[thread] Dispatch UST command started"); | |
1741 | ||
26c9d55e | 1742 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1743 | health_code_update(); |
1744 | ||
099e26bd DG |
1745 | /* Atomically prepare the queue futex */ |
1746 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1747 | ||
1748 | do { | |
d0b96690 | 1749 | struct ust_app *app = NULL; |
7972aab2 | 1750 | ust_cmd = NULL; |
d0b96690 | 1751 | |
f45e313d DG |
1752 | /* |
1753 | * Make sure we don't have node(s) that have hung up before receiving | |
1754 | * the notify socket. This is to clean the list in order to avoid | |
1755 | * memory leaks from notify socket that are never seen. | |
1756 | */ | |
1757 | sanitize_wait_queue(&wait_queue); | |
1758 | ||
12e2b881 | 1759 | health_code_update(); |
099e26bd DG |
1760 | /* Dequeue command for registration */ |
1761 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1762 | if (node == NULL) { | |
00a17c97 | 1763 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1764 | /* Continue thread execution */ |
1765 | break; | |
1766 | } | |
1767 | ||
1768 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1769 | ||
2f50c8a3 DG |
1770 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1771 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1772 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1773 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1774 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1775 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1776 | |
1777 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1778 | wait_node = zmalloc(sizeof(*wait_node)); | |
1779 | if (!wait_node) { | |
1780 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1781 | ret = close(ust_cmd->sock); |
1782 | if (ret < 0) { | |
1783 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1784 | } | |
51dec90d | 1785 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1786 | free(ust_cmd); |
d0b96690 DG |
1787 | goto error; |
1788 | } | |
1789 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1790 | ||
1791 | /* Create application object if socket is CMD. */ | |
1792 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1793 | ust_cmd->sock); | |
1794 | if (!wait_node->app) { | |
1795 | ret = close(ust_cmd->sock); | |
1796 | if (ret < 0) { | |
1797 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1798 | } |
51dec90d | 1799 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1800 | free(wait_node); |
7972aab2 | 1801 | free(ust_cmd); |
d0b96690 DG |
1802 | continue; |
1803 | } | |
1804 | /* | |
1805 | * Add application to the wait queue so we can set the notify | |
1806 | * socket before putting this object in the global ht. | |
1807 | */ | |
f45e313d DG |
1808 | cds_list_add(&wait_node->head, &wait_queue.head); |
1809 | wait_queue.count++; | |
d0b96690 | 1810 | |
7972aab2 | 1811 | free(ust_cmd); |
d0b96690 DG |
1812 | /* |
1813 | * We have to continue here since we don't have the notify | |
1814 | * socket and the application MUST be added to the hash table | |
1815 | * only at that moment. | |
1816 | */ | |
1817 | continue; | |
1818 | } else { | |
1819 | /* | |
1820 | * Look for the application in the local wait queue and set the | |
1821 | * notify socket if found. | |
1822 | */ | |
d88aee68 | 1823 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1824 | &wait_queue.head, head) { |
12e2b881 | 1825 | health_code_update(); |
d0b96690 DG |
1826 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1827 | wait_node->app->notify_sock = ust_cmd->sock; | |
1828 | cds_list_del(&wait_node->head); | |
f45e313d | 1829 | wait_queue.count--; |
d0b96690 DG |
1830 | app = wait_node->app; |
1831 | free(wait_node); | |
1832 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1833 | break; | |
1834 | } | |
1835 | } | |
020d7f60 DG |
1836 | |
1837 | /* | |
1838 | * With no application at this stage the received socket is | |
1839 | * basically useless so close it before we free the cmd data | |
1840 | * structure for good. | |
1841 | */ | |
1842 | if (!app) { | |
1843 | ret = close(ust_cmd->sock); | |
1844 | if (ret < 0) { | |
1845 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1846 | } | |
51dec90d | 1847 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1848 | } |
7972aab2 | 1849 | free(ust_cmd); |
d0b96690 DG |
1850 | } |
1851 | ||
1852 | if (app) { | |
d0b96690 DG |
1853 | /* |
1854 | * @session_lock_list | |
1855 | * | |
1856 | * Lock the global session list so from the register up to the | |
1857 | * registration done message, no thread can see the application | |
1858 | * and change its state. | |
1859 | */ | |
1860 | session_lock_list(); | |
1861 | rcu_read_lock(); | |
d88aee68 | 1862 | |
d0b96690 DG |
1863 | /* |
1864 | * Add application to the global hash table. This needs to be | |
1865 | * done before the update to the UST registry can locate the | |
1866 | * application. | |
1867 | */ | |
1868 | ust_app_add(app); | |
d88aee68 DG |
1869 | |
1870 | /* Set app version. This call will print an error if needed. */ | |
1871 | (void) ust_app_version(app); | |
1872 | ||
1873 | /* Send notify socket through the notify pipe. */ | |
1874 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1875 | app->notify_sock); | |
1876 | if (ret < 0) { | |
1877 | rcu_read_unlock(); | |
1878 | session_unlock_list(); | |
b85dc84c DG |
1879 | /* |
1880 | * No notify thread, stop the UST tracing. However, this is | |
1881 | * not an internal error of the this thread thus setting | |
1882 | * the health error code to a normal exit. | |
1883 | */ | |
1884 | err = 0; | |
d88aee68 | 1885 | goto error; |
6620da75 | 1886 | } |
d88aee68 | 1887 | |
d0b96690 DG |
1888 | /* |
1889 | * Update newly registered application with the tracing | |
1890 | * registry info already enabled information. | |
1891 | */ | |
1892 | update_ust_app(app->sock); | |
d88aee68 DG |
1893 | |
1894 | /* | |
1895 | * Don't care about return value. Let the manage apps threads | |
1896 | * handle app unregistration upon socket close. | |
1897 | */ | |
1898 | (void) ust_app_register_done(app->sock); | |
1899 | ||
1900 | /* | |
1901 | * Even if the application socket has been closed, send the app | |
1902 | * to the thread and unregistration will take place at that | |
1903 | * place. | |
1904 | */ | |
1905 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1906 | if (ret < 0) { |
d88aee68 DG |
1907 | rcu_read_unlock(); |
1908 | session_unlock_list(); | |
b85dc84c DG |
1909 | /* |
1910 | * No apps. thread, stop the UST tracing. However, this is | |
1911 | * not an internal error of the this thread thus setting | |
1912 | * the health error code to a normal exit. | |
1913 | */ | |
1914 | err = 0; | |
d88aee68 | 1915 | goto error; |
d0b96690 | 1916 | } |
d88aee68 | 1917 | |
d0b96690 DG |
1918 | rcu_read_unlock(); |
1919 | session_unlock_list(); | |
099e26bd | 1920 | } |
099e26bd DG |
1921 | } while (node != NULL); |
1922 | ||
12e2b881 | 1923 | health_poll_entry(); |
099e26bd DG |
1924 | /* Futex wait on queue. Blocking call on futex() */ |
1925 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1926 | health_poll_exit(); |
099e26bd | 1927 | } |
12e2b881 MD |
1928 | /* Normal exit, no error */ |
1929 | err = 0; | |
099e26bd DG |
1930 | |
1931 | error: | |
d88aee68 DG |
1932 | /* Clean up wait queue. */ |
1933 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1934 | &wait_queue.head, head) { |
d88aee68 | 1935 | cds_list_del(&wait_node->head); |
f45e313d | 1936 | wait_queue.count--; |
d88aee68 DG |
1937 | free(wait_node); |
1938 | } | |
1939 | ||
9ad42ec1 | 1940 | error_testpoint: |
099e26bd | 1941 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1942 | if (err) { |
1943 | health_error(); | |
1944 | ERR("Health error occurred in %s", __func__); | |
1945 | } | |
8782cc74 | 1946 | health_unregister(health_sessiond); |
099e26bd DG |
1947 | return NULL; |
1948 | } | |
1949 | ||
1950 | /* | |
1951 | * This thread manage application registration. | |
1952 | */ | |
1953 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1954 | { |
139ac872 | 1955 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1956 | uint32_t revents, nb_fd; |
1957 | struct lttng_poll_event events; | |
099e26bd DG |
1958 | /* |
1959 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1960 | * freed in the manage apps thread. | |
1961 | */ | |
1962 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1963 | |
099e26bd | 1964 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1965 | |
6c71277b | 1966 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1967 | |
e547b070 | 1968 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
1969 | goto error_testpoint; |
1970 | } | |
8ac94142 | 1971 | |
1d4b027a DG |
1972 | ret = lttcomm_listen_unix_sock(apps_sock); |
1973 | if (ret < 0) { | |
76d7553f | 1974 | goto error_listen; |
1d4b027a DG |
1975 | } |
1976 | ||
5eb91c98 DG |
1977 | /* |
1978 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1979 | * more will be added to this poll set. | |
1980 | */ | |
d0b96690 | 1981 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1982 | if (ret < 0) { |
76d7553f | 1983 | goto error_create_poll; |
5eb91c98 | 1984 | } |
273ea72c | 1985 | |
5eb91c98 DG |
1986 | /* Add the application registration socket */ |
1987 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1988 | if (ret < 0) { | |
76d7553f | 1989 | goto error_poll_add; |
5eb91c98 | 1990 | } |
273ea72c | 1991 | |
1d4b027a | 1992 | /* Notify all applications to register */ |
0fdd1e2c DG |
1993 | ret = notify_ust_apps(1); |
1994 | if (ret < 0) { | |
1995 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1996 | "Execution continues but there might be problem for already\n" |
1997 | "running applications that wishes to register."); | |
0fdd1e2c | 1998 | } |
1d4b027a DG |
1999 | |
2000 | while (1) { | |
2001 | DBG("Accepting application registration"); | |
273ea72c DG |
2002 | |
2003 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2004 | restart: |
a78af745 | 2005 | health_poll_entry(); |
5eb91c98 | 2006 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2007 | health_poll_exit(); |
273ea72c | 2008 | if (ret < 0) { |
88f2b785 MD |
2009 | /* |
2010 | * Restart interrupted system call. | |
2011 | */ | |
2012 | if (errno == EINTR) { | |
2013 | goto restart; | |
2014 | } | |
273ea72c DG |
2015 | goto error; |
2016 | } | |
2017 | ||
0d9c5d77 DG |
2018 | nb_fd = ret; |
2019 | ||
5eb91c98 | 2020 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2021 | health_code_update(); |
139ac872 | 2022 | |
5eb91c98 DG |
2023 | /* Fetch once the poll data */ |
2024 | revents = LTTNG_POLL_GETEV(&events, i); | |
2025 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2026 | |
6550503d MD |
2027 | if (!revents) { |
2028 | /* No activity for this FD (poll implementation). */ | |
2029 | continue; | |
2030 | } | |
2031 | ||
5eb91c98 | 2032 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2033 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2034 | if (ret) { |
139ac872 MD |
2035 | err = 0; |
2036 | goto exit; | |
90014c57 | 2037 | } |
1d4b027a | 2038 | |
5eb91c98 DG |
2039 | /* Event on the registration socket */ |
2040 | if (pollfd == apps_sock) { | |
2041 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
2042 | ERR("Register apps socket poll error"); | |
2043 | goto error; | |
2044 | } else if (revents & LPOLLIN) { | |
2045 | sock = lttcomm_accept_unix_sock(apps_sock); | |
2046 | if (sock < 0) { | |
2047 | goto error; | |
2048 | } | |
099e26bd | 2049 | |
16c5c8fa DG |
2050 | /* |
2051 | * Set socket timeout for both receiving and ending. | |
2052 | * app_socket_timeout is in seconds, whereas | |
2053 | * lttcomm_setsockopt_rcv_timeout and | |
2054 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2055 | * parameter. | |
2056 | */ | |
2057 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
2058 | app_socket_timeout * 1000); | |
2059 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
2060 | app_socket_timeout * 1000); | |
2061 | ||
b662582b DG |
2062 | /* |
2063 | * Set the CLOEXEC flag. Return code is useless because | |
2064 | * either way, the show must go on. | |
2065 | */ | |
2066 | (void) utils_set_fd_cloexec(sock); | |
2067 | ||
5eb91c98 | 2068 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2069 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2070 | if (ust_cmd == NULL) { |
76d7553f | 2071 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
2072 | goto error; |
2073 | } | |
1d4b027a | 2074 | |
5eb91c98 DG |
2075 | /* |
2076 | * Using message-based transmissions to ensure we don't | |
2077 | * have to deal with partially received messages. | |
2078 | */ | |
4063050c MD |
2079 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2080 | if (ret < 0) { | |
2081 | ERR("Exhausted file descriptors allowed for applications."); | |
2082 | free(ust_cmd); | |
2083 | ret = close(sock); | |
2084 | if (ret) { | |
2085 | PERROR("close"); | |
2086 | } | |
2087 | sock = -1; | |
2088 | continue; | |
2089 | } | |
d88aee68 | 2090 | |
840cb59c | 2091 | health_code_update(); |
d0b96690 DG |
2092 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2093 | if (ret < 0) { | |
5eb91c98 | 2094 | free(ust_cmd); |
d0b96690 | 2095 | /* Close socket of the application. */ |
76d7553f MD |
2096 | ret = close(sock); |
2097 | if (ret) { | |
2098 | PERROR("close"); | |
2099 | } | |
4063050c | 2100 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2101 | sock = -1; |
5eb91c98 DG |
2102 | continue; |
2103 | } | |
840cb59c | 2104 | health_code_update(); |
099e26bd | 2105 | |
5eb91c98 | 2106 | ust_cmd->sock = sock; |
34a2494f | 2107 | sock = -1; |
099e26bd | 2108 | |
5eb91c98 DG |
2109 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2110 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2111 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2112 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2113 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2114 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2115 | |
5eb91c98 DG |
2116 | /* |
2117 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2118 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
2119 | */ |
2120 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
2121 | ||
2122 | /* | |
2123 | * Wake the registration queue futex. Implicit memory | |
2124 | * barrier with the exchange in cds_wfq_enqueue. | |
2125 | */ | |
2126 | futex_nto1_wake(&ust_cmd_queue.futex); | |
2127 | } | |
2128 | } | |
90014c57 | 2129 | } |
1d4b027a DG |
2130 | } |
2131 | ||
139ac872 | 2132 | exit: |
1d4b027a | 2133 | error: |
0fdd1e2c DG |
2134 | /* Notify that the registration thread is gone */ |
2135 | notify_ust_apps(0); | |
2136 | ||
a4b35e07 | 2137 | if (apps_sock >= 0) { |
76d7553f MD |
2138 | ret = close(apps_sock); |
2139 | if (ret) { | |
2140 | PERROR("close"); | |
2141 | } | |
a4b35e07 | 2142 | } |
46c3f085 | 2143 | if (sock >= 0) { |
76d7553f MD |
2144 | ret = close(sock); |
2145 | if (ret) { | |
2146 | PERROR("close"); | |
2147 | } | |
4063050c | 2148 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2149 | } |
273ea72c | 2150 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2151 | |
76d7553f | 2152 | error_poll_add: |
5eb91c98 | 2153 | lttng_poll_clean(&events); |
76d7553f MD |
2154 | error_listen: |
2155 | error_create_poll: | |
6993eeb3 | 2156 | error_testpoint: |
76d7553f | 2157 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2158 | if (err) { |
2159 | health_error(); | |
2160 | ERR("Health error occurred in %s", __func__); | |
2161 | } | |
8782cc74 | 2162 | health_unregister(health_sessiond); |
5eb91c98 | 2163 | |
1d4b027a DG |
2164 | return NULL; |
2165 | } | |
2166 | ||
8c0faa1d | 2167 | /* |
3bd1e081 | 2168 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2169 | * exec or it will fails. |
8c0faa1d | 2170 | */ |
3bd1e081 | 2171 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2172 | { |
a23ec3a7 | 2173 | int ret, clock_ret; |
ee0b0061 DG |
2174 | struct timespec timeout; |
2175 | ||
a23ec3a7 DG |
2176 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2177 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2178 | |
a23ec3a7 DG |
2179 | /* Setup pthread condition */ |
2180 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2181 | if (ret != 0) { | |
2182 | errno = ret; | |
2183 | PERROR("pthread_condattr_init consumer data"); | |
2184 | goto error; | |
2185 | } | |
2186 | ||
2187 | /* | |
2188 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2189 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2190 | * for a more details and how we noticed it. | |
2191 | */ | |
2192 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2193 | if (ret != 0) { | |
2194 | errno = ret; | |
2195 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2196 | goto error; |
2197 | } | |
8c0faa1d | 2198 | |
a23ec3a7 DG |
2199 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2200 | if (ret != 0) { | |
2201 | errno = ret; | |
2202 | PERROR("pthread_cond_init consumer data"); | |
2203 | goto error; | |
2204 | } | |
2205 | ||
2206 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2207 | consumer_data); | |
8c0faa1d | 2208 | if (ret != 0) { |
3bd1e081 | 2209 | PERROR("pthread_create consumer"); |
ee0b0061 | 2210 | ret = -1; |
8c0faa1d DG |
2211 | goto error; |
2212 | } | |
2213 | ||
a23ec3a7 DG |
2214 | /* We are about to wait on a pthread condition */ |
2215 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2216 | ||
ee0b0061 | 2217 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2218 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2219 | /* | |
2220 | * Set the timeout for the condition timed wait even if the clock gettime | |
2221 | * call fails since we might loop on that call and we want to avoid to | |
2222 | * increment the timeout too many times. | |
2223 | */ | |
2224 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2225 | ||
2226 | /* | |
2227 | * The following loop COULD be skipped in some conditions so this is why we | |
2228 | * set ret to 0 in order to make sure at least one round of the loop is | |
2229 | * done. | |
2230 | */ | |
2231 | ret = 0; | |
2232 | ||
2233 | /* | |
2234 | * Loop until the condition is reached or when a timeout is reached. Note | |
2235 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2236 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2237 | * possible. This loop does not take any chances and works with both of | |
2238 | * them. | |
2239 | */ | |
2240 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2241 | if (clock_ret < 0) { | |
2242 | PERROR("clock_gettime spawn consumer"); | |
2243 | /* Infinite wait for the consumerd thread to be ready */ | |
2244 | ret = pthread_cond_wait(&consumer_data->cond, | |
2245 | &consumer_data->cond_mutex); | |
2246 | } else { | |
2247 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2248 | &consumer_data->cond_mutex, &timeout); | |
2249 | } | |
ee0b0061 | 2250 | } |
8c0faa1d | 2251 | |
a23ec3a7 DG |
2252 | /* Release the pthread condition */ |
2253 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2254 | ||
2255 | if (ret != 0) { | |
2256 | errno = ret; | |
2257 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2258 | int pth_ret; |
2259 | ||
ee0b0061 DG |
2260 | /* |
2261 | * Call has timed out so we kill the kconsumerd_thread and return | |
2262 | * an error. | |
2263 | */ | |
a23ec3a7 DG |
2264 | ERR("Condition timed out. The consumer thread was never ready." |
2265 | " Killing it"); | |
4282f9a3 DG |
2266 | pth_ret = pthread_cancel(consumer_data->thread); |
2267 | if (pth_ret < 0) { | |
3bd1e081 | 2268 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2269 | } |
2270 | } else { | |
a23ec3a7 | 2271 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2272 | } |
4282f9a3 DG |
2273 | /* Caller is expecting a negative value on failure. */ |
2274 | ret = -1; | |
ee0b0061 DG |
2275 | goto error; |
2276 | } | |
2277 | ||
3bd1e081 MD |
2278 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2279 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2280 | ERR("Consumerd did not start"); |
3bd1e081 | 2281 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2282 | goto error; |
2283 | } | |
3bd1e081 | 2284 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2285 | |
8c0faa1d DG |
2286 | return 0; |
2287 | ||
2288 | error: | |
2289 | return ret; | |
2290 | } | |
2291 | ||
d9800920 | 2292 | /* |
3bd1e081 | 2293 | * Join consumer thread |
d9800920 | 2294 | */ |
3bd1e081 | 2295 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2296 | { |
2297 | void *status; | |
cf3af59e | 2298 | |
e8209f6b DG |
2299 | /* Consumer pid must be a real one. */ |
2300 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2301 | int ret; |
3bd1e081 | 2302 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2303 | if (ret) { |
3bd1e081 | 2304 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2305 | return ret; |
2306 | } | |
3bd1e081 | 2307 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2308 | } else { |
2309 | return 0; | |
2310 | } | |
2311 | } | |
2312 | ||
8c0faa1d | 2313 | /* |
3bd1e081 | 2314 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2315 | * |
d063d709 | 2316 | * Return pid if successful else -1. |
8c0faa1d | 2317 | */ |
3bd1e081 | 2318 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2319 | { |
2320 | int ret; | |
2321 | pid_t pid; | |
94c55f17 | 2322 | const char *consumer_to_use; |
53086306 | 2323 | const char *verbosity; |
94c55f17 | 2324 | struct stat st; |
8c0faa1d | 2325 | |
3bd1e081 | 2326 | DBG("Spawning consumerd"); |
c49dc785 | 2327 | |
8c0faa1d DG |
2328 | pid = fork(); |
2329 | if (pid == 0) { | |
2330 | /* | |
3bd1e081 | 2331 | * Exec consumerd. |
8c0faa1d | 2332 | */ |
daee5345 | 2333 | if (opt_verbose_consumer) { |
53086306 | 2334 | verbosity = "--verbose"; |
4421f712 | 2335 | } else if (lttng_opt_quiet) { |
53086306 | 2336 | verbosity = "--quiet"; |
4421f712 DG |
2337 | } else { |
2338 | verbosity = ""; | |
53086306 | 2339 | } |
4421f712 | 2340 | |
3bd1e081 MD |
2341 | switch (consumer_data->type) { |
2342 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2343 | /* |
c7704d57 DG |
2344 | * Find out which consumerd to execute. We will first try the |
2345 | * 64-bit path, then the sessiond's installation directory, and | |
2346 | * fallback on the 32-bit one, | |
94c55f17 | 2347 | */ |
63a799e8 AM |
2348 | DBG3("Looking for a kernel consumer at these locations:"); |
2349 | DBG3(" 1) %s", consumerd64_bin); | |
2350 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2351 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2352 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2353 | DBG3("Found location #1"); |
94c55f17 | 2354 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2355 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2356 | DBG3("Found location #2"); |
94c55f17 | 2357 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2358 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2359 | DBG3("Found location #3"); |
eb1e0bd4 | 2360 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2361 | } else { |
63a799e8 | 2362 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2363 | ret = -EINVAL; |
94c55f17 AM |
2364 | break; |
2365 | } | |
2366 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
4282f9a3 | 2367 | ret = execl(consumer_to_use, |
94c55f17 AM |
2368 | "lttng-consumerd", verbosity, "-k", |
2369 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2370 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2371 | "--group", tracing_group_name, |
94c55f17 | 2372 | NULL); |
3bd1e081 | 2373 | break; |
7753dea8 MD |
2374 | case LTTNG_CONSUMER64_UST: |
2375 | { | |
b1e0b6b6 | 2376 | char *tmpnew = NULL; |
8f4905da MD |
2377 | |
2378 | if (consumerd64_libdir[0] != '\0') { | |
2379 | char *tmp; | |
2380 | size_t tmplen; | |
2381 | ||
2382 | tmp = getenv("LD_LIBRARY_PATH"); | |
2383 | if (!tmp) { | |
2384 | tmp = ""; | |
2385 | } | |
2386 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2387 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2388 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2389 | if (!tmpnew) { | |
2390 | ret = -ENOMEM; | |
2391 | goto error; | |
2392 | } | |
2393 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2394 | strcat(tmpnew, consumerd64_libdir); | |
2395 | if (tmp[0] != '\0') { | |
2396 | strcat(tmpnew, ":"); | |
2397 | strcat(tmpnew, tmp); | |
2398 | } | |
2399 | ret = putenv(tmpnew); | |
2400 | if (ret) { | |
2401 | ret = -errno; | |
c6f76da9 | 2402 | free(tmpnew); |
8f4905da MD |
2403 | goto error; |
2404 | } | |
2405 | } | |
94c55f17 | 2406 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2407 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2408 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2409 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2410 | "--group", tracing_group_name, |
7753dea8 | 2411 | NULL); |
8f4905da MD |
2412 | if (consumerd64_libdir[0] != '\0') { |
2413 | free(tmpnew); | |
2414 | } | |
3bd1e081 | 2415 | break; |
7753dea8 MD |
2416 | } |
2417 | case LTTNG_CONSUMER32_UST: | |
2418 | { | |
937dde8e | 2419 | char *tmpnew = NULL; |
8f4905da MD |
2420 | |
2421 | if (consumerd32_libdir[0] != '\0') { | |
2422 | char *tmp; | |
2423 | size_t tmplen; | |
2424 | ||
2425 | tmp = getenv("LD_LIBRARY_PATH"); | |
2426 | if (!tmp) { | |
2427 | tmp = ""; | |
2428 | } | |
2429 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2430 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2431 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2432 | if (!tmpnew) { | |
2433 | ret = -ENOMEM; | |
2434 | goto error; | |
2435 | } | |
2436 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2437 | strcat(tmpnew, consumerd32_libdir); | |
2438 | if (tmp[0] != '\0') { | |
2439 | strcat(tmpnew, ":"); | |
2440 | strcat(tmpnew, tmp); | |
2441 | } | |
2442 | ret = putenv(tmpnew); | |
2443 | if (ret) { | |
2444 | ret = -errno; | |
c6f76da9 | 2445 | free(tmpnew); |
8f4905da MD |
2446 | goto error; |
2447 | } | |
2448 | } | |
94c55f17 | 2449 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2450 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2451 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2452 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2453 | "--group", tracing_group_name, |
7753dea8 | 2454 | NULL); |
8f4905da MD |
2455 | if (consumerd32_libdir[0] != '\0') { |
2456 | free(tmpnew); | |
2457 | } | |
7753dea8 MD |
2458 | break; |
2459 | } | |
3bd1e081 | 2460 | default: |
76d7553f | 2461 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2462 | exit(EXIT_FAILURE); |
2463 | } | |
8c0faa1d | 2464 | if (errno != 0) { |
4282f9a3 | 2465 | PERROR("Consumer execl()"); |
8c0faa1d | 2466 | } |
4282f9a3 | 2467 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2468 | exit(EXIT_FAILURE); |
2469 | } else if (pid > 0) { | |
2470 | ret = pid; | |
8c0faa1d | 2471 | } else { |
76d7553f | 2472 | PERROR("start consumer fork"); |
8c0faa1d | 2473 | ret = -errno; |
8c0faa1d | 2474 | } |
8f4905da | 2475 | error: |
8c0faa1d DG |
2476 | return ret; |
2477 | } | |
2478 | ||
693bd40b | 2479 | /* |
3bd1e081 | 2480 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2481 | */ |
3bd1e081 | 2482 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2483 | { |
c617c0c6 | 2484 | int ret; |
edb8b045 DG |
2485 | |
2486 | /* | |
2487 | * Set the listen() state on the socket since there is a possible race | |
2488 | * between the exec() of the consumer daemon and this call if place in the | |
2489 | * consumer thread. See bug #366 for more details. | |
2490 | */ | |
2491 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2492 | if (ret < 0) { | |
2493 | goto error; | |
2494 | } | |
693bd40b | 2495 | |
3bd1e081 MD |
2496 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2497 | if (consumer_data->pid != 0) { | |
2498 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2499 | goto end; |
2500 | } | |
693bd40b | 2501 | |
3bd1e081 | 2502 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2503 | if (ret < 0) { |
3bd1e081 MD |
2504 | ERR("Spawning consumerd failed"); |
2505 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2506 | goto error; |
693bd40b | 2507 | } |
c49dc785 | 2508 | |
3bd1e081 MD |
2509 | /* Setting up the consumer_data pid */ |
2510 | consumer_data->pid = ret; | |
48842b30 | 2511 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2512 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2513 | |
3bd1e081 MD |
2514 | DBG2("Spawning consumer control thread"); |
2515 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2516 | if (ret < 0) { |
3bd1e081 | 2517 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2518 | goto error; |
2519 | } | |
2520 | ||
c49dc785 | 2521 | end: |
693bd40b DG |
2522 | return 0; |
2523 | ||
2524 | error: | |
331744e3 | 2525 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2526 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2527 | int err; |
2528 | ||
edb8b045 DG |
2529 | err = close(consumer_data->err_sock); |
2530 | if (err < 0) { | |
2531 | PERROR("close consumer data error socket"); | |
2532 | } | |
2533 | } | |
693bd40b DG |
2534 | return ret; |
2535 | } | |
2536 | ||
b73401da | 2537 | /* |
096102bd | 2538 | * Setup necessary data for kernel tracer action. |
b73401da | 2539 | */ |
096102bd | 2540 | static int init_kernel_tracer(void) |
b73401da DG |
2541 | { |
2542 | int ret; | |
b73401da | 2543 | |
096102bd DG |
2544 | /* Modprobe lttng kernel modules */ |
2545 | ret = modprobe_lttng_control(); | |
b73401da | 2546 | if (ret < 0) { |
b73401da DG |
2547 | goto error; |
2548 | } | |
2549 | ||
096102bd DG |
2550 | /* Open debugfs lttng */ |
2551 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2552 | if (kernel_tracer_fd < 0) { | |
2553 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2554 | ret = -1; |
2555 | goto error_open; | |
54d01ffb DG |
2556 | } |
2557 | ||
2f77fc4b DG |
2558 | /* Validate kernel version */ |
2559 | ret = kernel_validate_version(kernel_tracer_fd); | |
2560 | if (ret < 0) { | |
2561 | goto error_version; | |
b551a063 | 2562 | } |
54d01ffb | 2563 | |
2f77fc4b DG |
2564 | ret = modprobe_lttng_data(); |
2565 | if (ret < 0) { | |
2566 | goto error_modules; | |
54d01ffb DG |
2567 | } |
2568 | ||
2f77fc4b DG |
2569 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2570 | return 0; | |
2571 | ||
2572 | error_version: | |
2573 | modprobe_remove_lttng_control(); | |
2574 | ret = close(kernel_tracer_fd); | |
2575 | if (ret) { | |
2576 | PERROR("close"); | |
b551a063 | 2577 | } |
2f77fc4b | 2578 | kernel_tracer_fd = -1; |
f73fabfd | 2579 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2580 | |
2f77fc4b DG |
2581 | error_modules: |
2582 | ret = close(kernel_tracer_fd); | |
2583 | if (ret) { | |
2584 | PERROR("close"); | |
b551a063 | 2585 | } |
54d01ffb | 2586 | |
2f77fc4b DG |
2587 | error_open: |
2588 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2589 | |
2590 | error: | |
2f77fc4b DG |
2591 | WARN("No kernel tracer available"); |
2592 | kernel_tracer_fd = -1; | |
2593 | if (!is_root) { | |
f73fabfd | 2594 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2595 | } else { |
f73fabfd | 2596 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2597 | } |
54d01ffb DG |
2598 | } |
2599 | ||
2f77fc4b | 2600 | |
54d01ffb | 2601 | /* |
2f77fc4b DG |
2602 | * Copy consumer output from the tracing session to the domain session. The |
2603 | * function also applies the right modification on a per domain basis for the | |
2604 | * trace files destination directory. | |
36b588ed MD |
2605 | * |
2606 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2607 | */ |
2f77fc4b | 2608 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2609 | { |
2610 | int ret; | |
2f77fc4b DG |
2611 | const char *dir_name; |
2612 | struct consumer_output *consumer; | |
2613 | ||
2614 | assert(session); | |
2615 | assert(session->consumer); | |
54d01ffb | 2616 | |
b551a063 DG |
2617 | switch (domain) { |
2618 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2619 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2620 | /* |
2621 | * XXX: We should audit the session creation and what this function | |
2622 | * does "extra" in order to avoid a destroy since this function is used | |
2623 | * in the domain session creation (kernel and ust) only. Same for UST | |
2624 | * domain. | |
2625 | */ | |
2626 | if (session->kernel_session->consumer) { | |
2627 | consumer_destroy_output(session->kernel_session->consumer); | |
2628 | } | |
2f77fc4b DG |
2629 | session->kernel_session->consumer = |
2630 | consumer_copy_output(session->consumer); | |
2631 | /* Ease our life a bit for the next part */ | |
2632 | consumer = session->kernel_session->consumer; | |
2633 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2634 | break; |
f20baf8e | 2635 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2636 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2637 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2638 | if (session->ust_session->consumer) { |
2639 | consumer_destroy_output(session->ust_session->consumer); | |
2640 | } | |
2f77fc4b DG |
2641 | session->ust_session->consumer = |
2642 | consumer_copy_output(session->consumer); | |
2643 | /* Ease our life a bit for the next part */ | |
2644 | consumer = session->ust_session->consumer; | |
2645 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2646 | break; |
2647 | default: | |
f73fabfd | 2648 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2649 | goto error; |
2650 | } | |
2651 | ||
2f77fc4b | 2652 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2653 | strncat(consumer->subdir, dir_name, |
2654 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2655 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2656 | ||
f73fabfd | 2657 | ret = LTTNG_OK; |
54d01ffb DG |
2658 | |
2659 | error: | |
2660 | return ret; | |
2661 | } | |
2662 | ||
00e2e675 | 2663 | /* |
2f77fc4b | 2664 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2665 | * |
2666 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2667 | */ |
2f77fc4b DG |
2668 | static int create_ust_session(struct ltt_session *session, |
2669 | struct lttng_domain *domain) | |
00e2e675 DG |
2670 | { |
2671 | int ret; | |
2f77fc4b | 2672 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2673 | |
a4b92340 | 2674 | assert(session); |
2f77fc4b DG |
2675 | assert(domain); |
2676 | assert(session->consumer); | |
a4b92340 | 2677 | |
2f77fc4b | 2678 | switch (domain->type) { |
f20baf8e | 2679 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2680 | case LTTNG_DOMAIN_UST: |
2681 | break; | |
2682 | default: | |
2683 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2684 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2685 | goto error; |
2686 | } | |
2687 | ||
2f77fc4b DG |
2688 | DBG("Creating UST session"); |
2689 | ||
dec56f6c | 2690 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2691 | if (lus == NULL) { |
f73fabfd | 2692 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2693 | goto error; |
2694 | } | |
2695 | ||
2f77fc4b DG |
2696 | lus->uid = session->uid; |
2697 | lus->gid = session->gid; | |
2bba9e53 | 2698 | lus->output_traces = session->output_traces; |
27babd3a | 2699 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2700 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2701 | session->ust_session = lus; |
00e2e675 | 2702 | |
2f77fc4b DG |
2703 | /* Copy session output to the newly created UST session */ |
2704 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2705 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2706 | goto error; |
2707 | } | |
2708 | ||
f73fabfd | 2709 | return LTTNG_OK; |
00e2e675 DG |
2710 | |
2711 | error: | |
2f77fc4b DG |
2712 | free(lus); |
2713 | session->ust_session = NULL; | |
00e2e675 DG |
2714 | return ret; |
2715 | } | |
2716 | ||
2717 | /* | |
2f77fc4b | 2718 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2719 | */ |
2f77fc4b | 2720 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2721 | { |
2722 | int ret; | |
a4b92340 | 2723 | |
2f77fc4b | 2724 | DBG("Creating kernel session"); |
00e2e675 | 2725 | |
2f77fc4b DG |
2726 | ret = kernel_create_session(session, kernel_tracer_fd); |
2727 | if (ret < 0) { | |
f73fabfd | 2728 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2729 | goto error; |
2730 | } | |
2731 | ||
2f77fc4b DG |
2732 | /* Code flow safety */ |
2733 | assert(session->kernel_session); | |
2734 | ||
2735 | /* Copy session output to the newly created Kernel session */ | |
2736 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2737 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2738 | goto error; |
2739 | } | |
2740 | ||
2f77fc4b DG |
2741 | /* Create directory(ies) on local filesystem. */ |
2742 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2743 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2744 | ret = run_as_mkdir_recursive( | |
2745 | session->kernel_session->consumer->dst.trace_path, | |
2746 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2747 | if (ret < 0) { | |
2748 | if (ret != -EEXIST) { | |
2749 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2750 | goto error; |
2751 | } | |
00e2e675 | 2752 | } |
2f77fc4b | 2753 | } |
00e2e675 | 2754 | |
2f77fc4b DG |
2755 | session->kernel_session->uid = session->uid; |
2756 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2757 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2758 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2759 | |
f73fabfd | 2760 | return LTTNG_OK; |
00e2e675 | 2761 | |
2f77fc4b DG |
2762 | error: |
2763 | trace_kernel_destroy_session(session->kernel_session); | |
2764 | session->kernel_session = NULL; | |
2765 | return ret; | |
2766 | } | |
00e2e675 | 2767 | |
2f77fc4b DG |
2768 | /* |
2769 | * Count number of session permitted by uid/gid. | |
2770 | */ | |
2771 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2772 | { | |
2773 | unsigned int i = 0; | |
2774 | struct ltt_session *session; | |
07424f16 | 2775 | |
2f77fc4b DG |
2776 | DBG("Counting number of available session for UID %d GID %d", |
2777 | uid, gid); | |
2778 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2779 | /* |
2f77fc4b | 2780 | * Only list the sessions the user can control. |
00e2e675 | 2781 | */ |
2f77fc4b DG |
2782 | if (!session_access_ok(session, uid, gid)) { |
2783 | continue; | |
2784 | } | |
2785 | i++; | |
a4b92340 | 2786 | } |
2f77fc4b | 2787 | return i; |
00e2e675 DG |
2788 | } |
2789 | ||
54d01ffb DG |
2790 | /* |
2791 | * Process the command requested by the lttng client within the command | |
2792 | * context structure. This function make sure that the return structure (llm) | |
2793 | * is set and ready for transmission before returning. | |
2794 | * | |
2795 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2796 | * |
2797 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2798 | * |
2799 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2800 | */ |
53a80697 MD |
2801 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2802 | int *sock_error) | |
54d01ffb | 2803 | { |
f73fabfd | 2804 | int ret = LTTNG_OK; |
44d3bd01 | 2805 | int need_tracing_session = 1; |
2e09ba09 | 2806 | int need_domain; |
54d01ffb DG |
2807 | |
2808 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2809 | ||
53a80697 MD |
2810 | *sock_error = 0; |
2811 | ||
2e09ba09 MD |
2812 | switch (cmd_ctx->lsm->cmd_type) { |
2813 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2814 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2815 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2816 | case LTTNG_DESTROY_SESSION: |
2817 | case LTTNG_LIST_SESSIONS: | |
2818 | case LTTNG_LIST_DOMAINS: | |
2819 | case LTTNG_START_TRACE: | |
2820 | case LTTNG_STOP_TRACE: | |
6d805429 | 2821 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2822 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2823 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2824 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2825 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2826 | case LTTNG_SAVE_SESSION: |
2e09ba09 | 2827 | need_domain = 0; |
3aace903 | 2828 | break; |
2e09ba09 MD |
2829 | default: |
2830 | need_domain = 1; | |
2831 | } | |
2832 | ||
2833 | if (opt_no_kernel && need_domain | |
2834 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2835 | if (!is_root) { |
f73fabfd | 2836 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2837 | } else { |
f73fabfd | 2838 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2839 | } |
4fba7219 DG |
2840 | goto error; |
2841 | } | |
2842 | ||
8d3113b2 DG |
2843 | /* Deny register consumer if we already have a spawned consumer. */ |
2844 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2845 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2846 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2847 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2848 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2849 | goto error; |
2850 | } | |
2851 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2852 | } | |
2853 | ||
54d01ffb DG |
2854 | /* |
2855 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2856 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2857 | * command. |
2858 | */ | |
2859 | switch(cmd_ctx->lsm->cmd_type) { | |
2860 | case LTTNG_LIST_SESSIONS: | |
2861 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2862 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2863 | case LTTNG_LIST_DOMAINS: |
2864 | case LTTNG_LIST_CHANNELS: | |
2865 | case LTTNG_LIST_EVENTS: | |
2866 | break; | |
2867 | default: | |
2868 | /* Setup lttng message with no payload */ | |
2869 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2870 | if (ret < 0) { | |
2871 | /* This label does not try to unlock the session */ | |
2872 | goto init_setup_error; | |
2873 | } | |
2874 | } | |
2875 | ||
2876 | /* Commands that DO NOT need a session. */ | |
2877 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2878 | case LTTNG_CREATE_SESSION: |
27babd3a | 2879 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2880 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2881 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2882 | case LTTNG_LIST_SESSIONS: |
2883 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2884 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2885 | case LTTNG_SAVE_SESSION: |
44d3bd01 | 2886 | need_tracing_session = 0; |
54d01ffb DG |
2887 | break; |
2888 | default: | |
2889 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2890 | /* |
2891 | * We keep the session list lock across _all_ commands | |
2892 | * for now, because the per-session lock does not | |
2893 | * handle teardown properly. | |
2894 | */ | |
74babd95 | 2895 | session_lock_list(); |
54d01ffb DG |
2896 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2897 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2898 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2899 | goto error; |
2900 | } else { | |
2901 | /* Acquire lock for the session */ | |
2902 | session_lock(cmd_ctx->session); | |
2903 | } | |
2904 | break; | |
2905 | } | |
b389abbe | 2906 | |
5f3ecf22 DG |
2907 | /* |
2908 | * Commands that need a valid session but should NOT create one if none | |
2909 | * exists. Instead of creating one and destroying it when the command is | |
2910 | * handled, process that right before so we save some round trip in useless | |
2911 | * code path. | |
2912 | */ | |
2913 | switch (cmd_ctx->lsm->cmd_type) { | |
2914 | case LTTNG_DISABLE_CHANNEL: | |
2915 | case LTTNG_DISABLE_EVENT: | |
2916 | case LTTNG_DISABLE_ALL_EVENT: | |
2917 | switch (cmd_ctx->lsm->domain.type) { | |
2918 | case LTTNG_DOMAIN_KERNEL: | |
2919 | if (!cmd_ctx->session->kernel_session) { | |
2920 | ret = LTTNG_ERR_NO_CHANNEL; | |
2921 | goto error; | |
2922 | } | |
2923 | break; | |
2924 | case LTTNG_DOMAIN_JUL: | |
2925 | case LTTNG_DOMAIN_UST: | |
2926 | if (!cmd_ctx->session->ust_session) { | |
2927 | ret = LTTNG_ERR_NO_CHANNEL; | |
2928 | goto error; | |
2929 | } | |
2930 | break; | |
2931 | default: | |
2932 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
2933 | goto error; | |
2934 | } | |
2935 | default: | |
2936 | break; | |
2937 | } | |
2938 | ||
2e09ba09 MD |
2939 | if (!need_domain) { |
2940 | goto skip_domain; | |
2941 | } | |
a4b92340 | 2942 | |
54d01ffb DG |
2943 | /* |
2944 | * Check domain type for specific "pre-action". | |
2945 | */ | |
2946 | switch (cmd_ctx->lsm->domain.type) { | |
2947 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2948 | if (!is_root) { |
f73fabfd | 2949 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2950 | goto error; |
2951 | } | |
2952 | ||
54d01ffb | 2953 | /* Kernel tracer check */ |
a4b35e07 | 2954 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2955 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2956 | ret = init_kernel_tracer(); |
2957 | if (ret != 0) { | |
54d01ffb DG |
2958 | goto error; |
2959 | } | |
2960 | } | |
5eb91c98 | 2961 | |
5c827ce0 DG |
2962 | /* Consumer is in an ERROR state. Report back to client */ |
2963 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2964 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2965 | goto error; |
2966 | } | |
2967 | ||
54d01ffb | 2968 | /* Need a session for kernel command */ |
44d3bd01 | 2969 | if (need_tracing_session) { |
54d01ffb | 2970 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2971 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2972 | if (ret < 0) { |
f73fabfd | 2973 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2974 | goto error; |
2975 | } | |
b389abbe | 2976 | } |
7d29a247 | 2977 | |
54d01ffb | 2978 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2979 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2980 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2981 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2982 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2983 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2984 | if (ret < 0) { |
f73fabfd | 2985 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2986 | goto error; |
950131af | 2987 | } |
5c827ce0 | 2988 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2989 | } else { |
2990 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2991 | } |
173af62f | 2992 | |
a4b92340 DG |
2993 | /* |
2994 | * The consumer was just spawned so we need to add the socket to | |
2995 | * the consumer output of the session if exist. | |
2996 | */ | |
2997 | ret = consumer_create_socket(&kconsumer_data, | |
2998 | cmd_ctx->session->kernel_session->consumer); | |
2999 | if (ret < 0) { | |
3000 | goto error; | |
173af62f | 3001 | } |
0d0c377a | 3002 | } |
5c827ce0 | 3003 | |
54d01ffb | 3004 | break; |
b9dfb167 | 3005 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 3006 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3007 | { |
b51ec5b4 MD |
3008 | if (!ust_app_supported()) { |
3009 | ret = LTTNG_ERR_NO_UST; | |
3010 | goto error; | |
3011 | } | |
5c827ce0 DG |
3012 | /* Consumer is in an ERROR state. Report back to client */ |
3013 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3014 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3015 | goto error; |
3016 | } | |
3017 | ||
44d3bd01 | 3018 | if (need_tracing_session) { |
a4b92340 | 3019 | /* Create UST session if none exist. */ |
f6a9efaa | 3020 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3021 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3022 | &cmd_ctx->lsm->domain); |
f73fabfd | 3023 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3024 | goto error; |
3025 | } | |
3026 | } | |
00e2e675 | 3027 | |
7753dea8 MD |
3028 | /* Start the UST consumer daemons */ |
3029 | /* 64-bit */ | |
3030 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 3031 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 3032 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3033 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3034 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3035 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3036 | if (ret < 0) { |
f73fabfd | 3037 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3038 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3039 | goto error; |
3040 | } | |
48842b30 | 3041 | |
173af62f | 3042 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3043 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3044 | } else { |
7753dea8 MD |
3045 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3046 | } | |
173af62f DG |
3047 | |
3048 | /* | |
3049 | * Setup socket for consumer 64 bit. No need for atomic access | |
3050 | * since it was set above and can ONLY be set in this thread. | |
3051 | */ | |
a4b92340 DG |
3052 | ret = consumer_create_socket(&ustconsumer64_data, |
3053 | cmd_ctx->session->ust_session->consumer); | |
3054 | if (ret < 0) { | |
3055 | goto error; | |
173af62f DG |
3056 | } |
3057 | ||
7753dea8 | 3058 | /* 32-bit */ |
04d21009 | 3059 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
fc7a59ce | 3060 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 3061 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3062 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3063 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3064 | ret = start_consumerd(&ustconsumer32_data); | |
3065 | if (ret < 0) { | |
f73fabfd | 3066 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3067 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3068 | goto error; |
3069 | } | |
5c827ce0 | 3070 | |
173af62f | 3071 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3072 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3073 | } else { |
3074 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3075 | } |
173af62f DG |
3076 | |
3077 | /* | |
3078 | * Setup socket for consumer 64 bit. No need for atomic access | |
3079 | * since it was set above and can ONLY be set in this thread. | |
3080 | */ | |
a4b92340 DG |
3081 | ret = consumer_create_socket(&ustconsumer32_data, |
3082 | cmd_ctx->session->ust_session->consumer); | |
3083 | if (ret < 0) { | |
3084 | goto error; | |
173af62f | 3085 | } |
44d3bd01 DG |
3086 | } |
3087 | break; | |
48842b30 | 3088 | } |
54d01ffb | 3089 | default: |
54d01ffb DG |
3090 | break; |
3091 | } | |
2e09ba09 | 3092 | skip_domain: |
33a2b854 | 3093 | |
5c827ce0 DG |
3094 | /* Validate consumer daemon state when start/stop trace command */ |
3095 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3096 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3097 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 3098 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
3099 | case LTTNG_DOMAIN_UST: |
3100 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3101 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3102 | goto error; |
3103 | } | |
3104 | break; | |
3105 | case LTTNG_DOMAIN_KERNEL: | |
3106 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3107 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3108 | goto error; |
3109 | } | |
3110 | break; | |
3111 | } | |
3112 | } | |
3113 | ||
8e0af1b4 MD |
3114 | /* |
3115 | * Check that the UID or GID match that of the tracing session. | |
3116 | * The root user can interact with all sessions. | |
3117 | */ | |
3118 | if (need_tracing_session) { | |
3119 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3120 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3121 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3122 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3123 | goto error; |
3124 | } | |
3125 | } | |
3126 | ||
ffe60014 DG |
3127 | /* |
3128 | * Send relayd information to consumer as soon as we have a domain and a | |
3129 | * session defined. | |
3130 | */ | |
3131 | if (cmd_ctx->session && need_domain) { | |
3132 | /* | |
3133 | * Setup relayd if not done yet. If the relayd information was already | |
3134 | * sent to the consumer, this call will gracefully return. | |
3135 | */ | |
3136 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3137 | if (ret != LTTNG_OK) { | |
3138 | goto error; | |
3139 | } | |
3140 | } | |
3141 | ||
54d01ffb DG |
3142 | /* Process by command type */ |
3143 | switch (cmd_ctx->lsm->cmd_type) { | |
3144 | case LTTNG_ADD_CONTEXT: | |
3145 | { | |
3146 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3147 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 3148 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
3149 | break; |
3150 | } | |
3151 | case LTTNG_DISABLE_CHANNEL: | |
3152 | { | |
3153 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3154 | cmd_ctx->lsm->u.disable.channel_name); | |
3155 | break; | |
3156 | } | |
3157 | case LTTNG_DISABLE_EVENT: | |
3158 | { | |
3159 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3160 | cmd_ctx->lsm->u.disable.channel_name, | |
3161 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
3162 | break; |
3163 | } | |
54d01ffb DG |
3164 | case LTTNG_DISABLE_ALL_EVENT: |
3165 | { | |
2bdd86d4 | 3166 | DBG("Disabling all events"); |
54d01ffb DG |
3167 | |
3168 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3169 | cmd_ctx->lsm->u.disable.channel_name); | |
3170 | break; | |
3171 | } | |
3172 | case LTTNG_ENABLE_CHANNEL: | |
3173 | { | |
7972aab2 | 3174 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3175 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3176 | break; |
3177 | } | |
3178 | case LTTNG_ENABLE_EVENT: | |
3179 | { | |
882ef835 JI |
3180 | struct lttng_event_exclusion *exclusion = NULL; |
3181 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3182 | char *filter_expression = NULL; |
882ef835 | 3183 | |
67676bd8 DG |
3184 | /* Handle exclusion events and receive it from the client. */ |
3185 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3186 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3187 | ||
3188 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3189 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3190 | if (!exclusion) { | |
3191 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3192 | goto error; | |
882ef835 | 3193 | } |
882ef835 | 3194 | |
67676bd8 DG |
3195 | DBG("Receiving var len exclusion event list from client ..."); |
3196 | exclusion->count = count; | |
3197 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3198 | count * LTTNG_SYMBOL_NAME_LEN); | |
3199 | if (ret <= 0) { | |
3200 | DBG("Nothing recv() from client var len data... continuing"); | |
3201 | *sock_error = 1; | |
3202 | free(exclusion); | |
3203 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3204 | goto error; | |
3205 | } | |
3206 | } | |
3207 | ||
6b453b5e JG |
3208 | /* Get filter expression from client. */ |
3209 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3210 | size_t expression_len = | |
3211 | cmd_ctx->lsm->u.enable.expression_len; | |
3212 | ||
3213 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3214 | ret = LTTNG_ERR_FILTER_INVAL; | |
3215 | free(exclusion); | |
3216 | goto error; | |
3217 | } | |
3218 | ||
3219 | filter_expression = zmalloc(expression_len); | |
3220 | if (!filter_expression) { | |
3221 | free(exclusion); | |
3222 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3223 | goto error; | |
3224 | } | |
3225 | ||
3226 | /* Receive var. len. data */ | |
3227 | DBG("Receiving var len filter's expression from client ..."); | |
3228 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3229 | expression_len); | |
3230 | if (ret <= 0) { | |
3231 | DBG("Nothing recv() from client car len data... continuing"); | |
3232 | *sock_error = 1; | |
3233 | free(filter_expression); | |
3234 | free(exclusion); | |
3235 | ret = LTTNG_ERR_FILTER_INVAL; | |
3236 | goto error; | |
3237 | } | |
3238 | } | |
3239 | ||
67676bd8 DG |
3240 | /* Handle filter and get bytecode from client. */ |
3241 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3242 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3243 | ||
3244 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3245 | ret = LTTNG_ERR_FILTER_INVAL; | |
7ea8750c | 3246 | free(filter_expression); |
67676bd8 DG |
3247 | free(exclusion); |
3248 | goto error; | |
3249 | } | |
3250 | ||
3251 | bytecode = zmalloc(bytecode_len); | |
3252 | if (!bytecode) { | |
7ea8750c | 3253 | free(filter_expression); |
67676bd8 DG |
3254 | free(exclusion); |
3255 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3256 | goto error; | |
882ef835 JI |
3257 | } |
3258 | ||
67676bd8 DG |
3259 | /* Receive var. len. data */ |
3260 | DBG("Receiving var len filter's bytecode from client ..."); | |
3261 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3262 | if (ret <= 0) { | |
3263 | DBG("Nothing recv() from client car len data... continuing"); | |
3264 | *sock_error = 1; | |
7ea8750c | 3265 | free(filter_expression); |
67676bd8 DG |
3266 | free(bytecode); |
3267 | free(exclusion); | |
3268 | ret = LTTNG_ERR_FILTER_INVAL; | |
3269 | goto error; | |
3270 | } | |
3271 | ||
3272 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
7ea8750c | 3273 | free(filter_expression); |
67676bd8 DG |
3274 | free(bytecode); |
3275 | free(exclusion); | |
3276 | ret = LTTNG_ERR_FILTER_INVAL; | |
3277 | goto error; | |
3278 | } | |
882ef835 | 3279 | } |
67676bd8 DG |
3280 | |
3281 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3282 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3283 | &cmd_ctx->lsm->u.enable.event, |
3284 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3285 | kernel_poll_pipe[1]); |
54d01ffb DG |
3286 | break; |
3287 | } | |
3288 | case LTTNG_ENABLE_ALL_EVENT: | |
3289 | { | |
2bdd86d4 | 3290 | DBG("Enabling all events"); |
54d01ffb | 3291 | |
7972aab2 | 3292 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3293 | cmd_ctx->lsm->u.enable.channel_name, |
6b453b5e JG |
3294 | cmd_ctx->lsm->u.enable.event.type, NULL, NULL, |
3295 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3296 | break; |
3297 | } | |
052da939 | 3298 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3299 | { |
9f19cc17 | 3300 | struct lttng_event *events; |
54d01ffb | 3301 | ssize_t nb_events; |
052da939 | 3302 | |
0845bbfa | 3303 | session_lock_list(); |
54d01ffb | 3304 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3305 | session_unlock_list(); |
54d01ffb | 3306 | if (nb_events < 0) { |
f73fabfd | 3307 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3308 | ret = -nb_events; |
3309 | goto error; | |
2ef84c95 DG |
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 | */ | |
052da939 | 3316 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3317 | if (ret < 0) { |
052da939 | 3318 | free(events); |
2ef84c95 DG |
3319 | goto setup_error; |
3320 | } | |
3321 | ||
3322 | /* Copy event list into message payload */ | |
9f19cc17 | 3323 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3324 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3325 | |
9f19cc17 | 3326 | free(events); |
2ef84c95 | 3327 | |
f73fabfd | 3328 | ret = LTTNG_OK; |
2ef84c95 DG |
3329 | break; |
3330 | } | |
f37d259d MD |
3331 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3332 | { | |
3333 | struct lttng_event_field *fields; | |
3334 | ssize_t nb_fields; | |
3335 | ||
0845bbfa | 3336 | session_lock_list(); |
a4b92340 DG |
3337 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3338 | &fields); | |
0845bbfa | 3339 | session_unlock_list(); |
f37d259d | 3340 | if (nb_fields < 0) { |
f73fabfd | 3341 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3342 | ret = -nb_fields; |
3343 | goto error; | |
3344 | } | |
3345 | ||
3346 | /* | |
3347 | * Setup lttng message with payload size set to the event list size in | |
3348 | * bytes and then copy list into the llm payload. | |
3349 | */ | |
a4b92340 DG |
3350 | ret = setup_lttng_msg(cmd_ctx, |
3351 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3352 | if (ret < 0) { |
3353 | free(fields); | |
3354 | goto setup_error; | |
3355 | } | |
3356 | ||
3357 | /* Copy event list into message payload */ | |
3358 | memcpy(cmd_ctx->llm->payload, fields, | |
3359 | sizeof(struct lttng_event_field) * nb_fields); | |
3360 | ||
3361 | free(fields); | |
3362 | ||
f73fabfd | 3363 | ret = LTTNG_OK; |
f37d259d MD |
3364 | break; |
3365 | } | |
00e2e675 DG |
3366 | case LTTNG_SET_CONSUMER_URI: |
3367 | { | |
a4b92340 DG |
3368 | size_t nb_uri, len; |
3369 | struct lttng_uri *uris; | |
3370 | ||
3371 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3372 | len = nb_uri * sizeof(struct lttng_uri); | |
3373 | ||
3374 | if (nb_uri == 0) { | |
f73fabfd | 3375 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3376 | goto error; |
3377 | } | |
3378 | ||
3379 | uris = zmalloc(len); | |
3380 | if (uris == NULL) { | |
f73fabfd | 3381 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3382 | goto error; |
3383 | } | |
3384 | ||
3385 | /* Receive variable len data */ | |
77c7c900 | 3386 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3387 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3388 | if (ret <= 0) { | |
3389 | DBG("No URIs received from client... continuing"); | |
3390 | *sock_error = 1; | |
f73fabfd | 3391 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3392 | free(uris); |
a4b92340 DG |
3393 | goto error; |
3394 | } | |
3395 | ||
e93eda1e JG |
3396 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3397 | free(uris); | |
f73fabfd | 3398 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3399 | goto error; |
3400 | } | |
3401 | ||
b1d41407 | 3402 | |
00e2e675 DG |
3403 | break; |
3404 | } | |
f3ed775e | 3405 | case LTTNG_START_TRACE: |
8c0faa1d | 3406 | { |
54d01ffb | 3407 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3408 | break; |
3409 | } | |
f3ed775e | 3410 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3411 | { |
54d01ffb | 3412 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3413 | break; |
3414 | } | |
5e16da05 MD |
3415 | case LTTNG_CREATE_SESSION: |
3416 | { | |
a4b92340 DG |
3417 | size_t nb_uri, len; |
3418 | struct lttng_uri *uris = NULL; | |
3419 | ||
3420 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3421 | len = nb_uri * sizeof(struct lttng_uri); | |
3422 | ||
3423 | if (nb_uri > 0) { | |
3424 | uris = zmalloc(len); | |
3425 | if (uris == NULL) { | |
f73fabfd | 3426 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3427 | goto error; |
3428 | } | |
3429 | ||
3430 | /* Receive variable len data */ | |
77c7c900 | 3431 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3432 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3433 | if (ret <= 0) { | |
3434 | DBG("No URIs received from client... continuing"); | |
3435 | *sock_error = 1; | |
f73fabfd | 3436 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3437 | free(uris); |
a4b92340 DG |
3438 | goto error; |
3439 | } | |
3440 | ||
3441 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3442 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3443 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3444 | free(uris); |
a4b92340 DG |
3445 | goto error; |
3446 | } | |
3447 | } | |
3448 | ||
3449 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3450 | &cmd_ctx->creds, 0); |
a4b92340 | 3451 | |
b1d41407 DG |
3452 | free(uris); |
3453 | ||
00e2e675 DG |
3454 | break; |
3455 | } | |
5e16da05 MD |
3456 | case LTTNG_DESTROY_SESSION: |
3457 | { | |
2f77fc4b | 3458 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3459 | |
3460 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3461 | cmd_ctx->session = NULL; |
5461b305 | 3462 | break; |
5e16da05 | 3463 | } |
9f19cc17 | 3464 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3465 | { |
54d01ffb DG |
3466 | ssize_t nb_dom; |
3467 | struct lttng_domain *domains; | |
5461b305 | 3468 | |
54d01ffb DG |
3469 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3470 | if (nb_dom < 0) { | |
f73fabfd | 3471 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3472 | ret = -nb_dom; |
3473 | goto error; | |
ce3d728c | 3474 | } |
520ff687 | 3475 | |
54d01ffb | 3476 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3477 | if (ret < 0) { |
ae9c20bc | 3478 | free(domains); |
5461b305 | 3479 | goto setup_error; |
520ff687 | 3480 | } |
57167058 | 3481 | |
54d01ffb DG |
3482 | /* Copy event list into message payload */ |
3483 | memcpy(cmd_ctx->llm->payload, domains, | |
3484 | nb_dom * sizeof(struct lttng_domain)); | |
3485 | ||
3486 | free(domains); | |
5e16da05 | 3487 | |
f73fabfd | 3488 | ret = LTTNG_OK; |
5e16da05 MD |
3489 | break; |
3490 | } | |
9f19cc17 | 3491 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3492 | { |
6775595e | 3493 | int nb_chan; |
d2243cc1 | 3494 | struct lttng_channel *channels = NULL; |
54d01ffb | 3495 | |
b551a063 DG |
3496 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3497 | cmd_ctx->session, &channels); | |
54d01ffb | 3498 | if (nb_chan < 0) { |
f73fabfd | 3499 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3500 | ret = -nb_chan; |
3501 | goto error; | |
5461b305 | 3502 | } |
ca95a216 | 3503 | |
54d01ffb | 3504 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3505 | if (ret < 0) { |
ae9c20bc | 3506 | free(channels); |
5461b305 DG |
3507 | goto setup_error; |
3508 | } | |
9f19cc17 | 3509 | |
54d01ffb DG |
3510 | /* Copy event list into message payload */ |
3511 | memcpy(cmd_ctx->llm->payload, channels, | |
3512 | nb_chan * sizeof(struct lttng_channel)); | |
3513 | ||
3514 | free(channels); | |
9f19cc17 | 3515 | |
f73fabfd | 3516 | ret = LTTNG_OK; |
5461b305 | 3517 | break; |
5e16da05 | 3518 | } |
9f19cc17 | 3519 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3520 | { |
b551a063 | 3521 | ssize_t nb_event; |
684d34d2 | 3522 | struct lttng_event *events = NULL; |
9f19cc17 | 3523 | |
b551a063 | 3524 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3525 | cmd_ctx->lsm->u.list.channel_name, &events); |
3526 | if (nb_event < 0) { | |
f73fabfd | 3527 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3528 | ret = -nb_event; |
3529 | goto error; | |
5461b305 | 3530 | } |
ca95a216 | 3531 | |
54d01ffb | 3532 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3533 | if (ret < 0) { |
ae9c20bc | 3534 | free(events); |
5461b305 DG |
3535 | goto setup_error; |
3536 | } | |
9f19cc17 | 3537 | |
54d01ffb DG |
3538 | /* Copy event list into message payload */ |
3539 | memcpy(cmd_ctx->llm->payload, events, | |
3540 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3541 | |
54d01ffb | 3542 | free(events); |
9f19cc17 | 3543 | |
f73fabfd | 3544 | ret = LTTNG_OK; |
5461b305 | 3545 | break; |
5e16da05 MD |
3546 | } |
3547 | case LTTNG_LIST_SESSIONS: | |
3548 | { | |
8e0af1b4 | 3549 | unsigned int nr_sessions; |
5461b305 | 3550 | |
8e0af1b4 | 3551 | session_lock_list(); |
730389d9 DG |
3552 | nr_sessions = lttng_sessions_count( |
3553 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3554 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3555 | |
8e0af1b4 | 3556 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3557 | if (ret < 0) { |
54d01ffb | 3558 | session_unlock_list(); |
5461b305 | 3559 | goto setup_error; |
e065084a | 3560 | } |
5e16da05 | 3561 | |
6c9cc2ab | 3562 | /* Filled the session array */ |
2f77fc4b | 3563 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3564 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3565 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3566 | |
54d01ffb | 3567 | session_unlock_list(); |
5e16da05 | 3568 | |
f73fabfd | 3569 | ret = LTTNG_OK; |
5e16da05 MD |
3570 | break; |
3571 | } | |
d0254c7c MD |
3572 | case LTTNG_CALIBRATE: |
3573 | { | |
54d01ffb DG |
3574 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3575 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3576 | break; |
3577 | } | |
d9800920 DG |
3578 | case LTTNG_REGISTER_CONSUMER: |
3579 | { | |
2f77fc4b DG |
3580 | struct consumer_data *cdata; |
3581 | ||
3582 | switch (cmd_ctx->lsm->domain.type) { | |
3583 | case LTTNG_DOMAIN_KERNEL: | |
3584 | cdata = &kconsumer_data; | |
3585 | break; | |
3586 | default: | |
f73fabfd | 3587 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3588 | goto error; |
3589 | } | |
3590 | ||
54d01ffb | 3591 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3592 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3593 | break; |
3594 | } | |
6d805429 | 3595 | case LTTNG_DATA_PENDING: |
806e2684 | 3596 | { |
6d805429 | 3597 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3598 | break; |
3599 | } | |
da3c9ec1 DG |
3600 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3601 | { | |
6dc3064a DG |
3602 | struct lttcomm_lttng_output_id reply; |
3603 | ||
3604 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3605 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3606 | if (ret != LTTNG_OK) { | |
3607 | goto error; | |
3608 | } | |
3609 | ||
3610 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3611 | if (ret < 0) { | |
3612 | goto setup_error; | |
3613 | } | |
3614 | ||
3615 | /* Copy output list into message payload */ | |
3616 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3617 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3618 | break; |
3619 | } | |
3620 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3621 | { | |
6dc3064a DG |
3622 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3623 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3624 | break; |
3625 | } | |
3626 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3627 | { | |
6dc3064a DG |
3628 | ssize_t nb_output; |
3629 | struct lttng_snapshot_output *outputs = NULL; | |
3630 | ||
3631 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3632 | if (nb_output < 0) { | |
3633 | ret = -nb_output; | |
3634 | goto error; | |
3635 | } | |
3636 | ||
3637 | ret = setup_lttng_msg(cmd_ctx, | |
3638 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3639 | if (ret < 0) { | |
3640 | free(outputs); | |
3641 | goto setup_error; | |
3642 | } | |
3643 | ||
3644 | if (outputs) { | |
3645 | /* Copy output list into message payload */ | |
3646 | memcpy(cmd_ctx->llm->payload, outputs, | |
3647 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3648 | free(outputs); | |
3649 | } | |
3650 | ||
3651 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3652 | break; |
3653 | } | |
3654 | case LTTNG_SNAPSHOT_RECORD: | |
3655 | { | |
6dc3064a DG |
3656 | ret = cmd_snapshot_record(cmd_ctx->session, |
3657 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3658 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3659 | break; |
3660 | } | |
27babd3a DG |
3661 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3662 | { | |
3663 | size_t nb_uri, len; | |
3664 | struct lttng_uri *uris = NULL; | |
3665 | ||
3666 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3667 | len = nb_uri * sizeof(struct lttng_uri); | |
3668 | ||
3669 | if (nb_uri > 0) { | |
3670 | uris = zmalloc(len); | |
3671 | if (uris == NULL) { | |
3672 | ret = LTTNG_ERR_FATAL; | |
3673 | goto error; | |
3674 | } | |
3675 | ||
3676 | /* Receive variable len data */ | |
3677 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3678 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3679 | if (ret <= 0) { | |
3680 | DBG("No URIs received from client... continuing"); | |
3681 | *sock_error = 1; | |
3682 | ret = LTTNG_ERR_SESSION_FAIL; | |
3683 | free(uris); | |
3684 | goto error; | |
3685 | } | |
3686 | ||
3687 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3688 | DBG("Creating session with ONE network URI is a bad call"); | |
3689 | ret = LTTNG_ERR_SESSION_FAIL; | |
3690 | free(uris); | |
3691 | goto error; | |
3692 | } | |
3693 | } | |
3694 | ||
3695 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3696 | nb_uri, &cmd_ctx->creds); | |
3697 | free(uris); | |
3698 | break; | |
3699 | } | |
ecc48a90 JD |
3700 | case LTTNG_CREATE_SESSION_LIVE: |
3701 | { | |
3702 | size_t nb_uri, len; | |
3703 | struct lttng_uri *uris = NULL; | |
3704 | ||
3705 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3706 | len = nb_uri * sizeof(struct lttng_uri); | |
3707 | ||
3708 | if (nb_uri > 0) { | |
3709 | uris = zmalloc(len); | |
3710 | if (uris == NULL) { | |
3711 | ret = LTTNG_ERR_FATAL; | |
3712 | goto error; | |
3713 | } | |
3714 | ||
3715 | /* Receive variable len data */ | |
3716 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3717 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3718 | if (ret <= 0) { | |
3719 | DBG("No URIs received from client... continuing"); | |
3720 | *sock_error = 1; | |
3721 | ret = LTTNG_ERR_SESSION_FAIL; | |
3722 | free(uris); | |
3723 | goto error; | |
3724 | } | |
3725 | ||
3726 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3727 | DBG("Creating session with ONE network URI is a bad call"); | |
3728 | ret = LTTNG_ERR_SESSION_FAIL; | |
3729 | free(uris); | |
3730 | goto error; | |
3731 | } | |
3732 | } | |
3733 | ||
3734 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3735 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3736 | free(uris); | |
3737 | break; | |
3738 | } | |
fb198a11 JG |
3739 | case LTTNG_SAVE_SESSION: |
3740 | { | |
3741 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
3742 | &cmd_ctx->creds); | |
3743 | break; | |
3744 | } | |
5e16da05 | 3745 | default: |
f73fabfd | 3746 | ret = LTTNG_ERR_UND; |
5461b305 | 3747 | break; |
fac6795d DG |
3748 | } |
3749 | ||
5461b305 | 3750 | error: |
5461b305 DG |
3751 | if (cmd_ctx->llm == NULL) { |
3752 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3753 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3754 | goto setup_error; |
3755 | } | |
3756 | } | |
54d01ffb | 3757 | /* Set return code */ |
5461b305 | 3758 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3759 | setup_error: |
b5541356 | 3760 | if (cmd_ctx->session) { |
54d01ffb | 3761 | session_unlock(cmd_ctx->session); |
b5541356 | 3762 | } |
256a5576 MD |
3763 | if (need_tracing_session) { |
3764 | session_unlock_list(); | |
3765 | } | |
54d01ffb | 3766 | init_setup_error: |
8028d920 | 3767 | return ret; |
fac6795d DG |
3768 | } |
3769 | ||
44a5e5eb DG |
3770 | /* |
3771 | * Thread managing health check socket. | |
3772 | */ | |
3773 | static void *thread_manage_health(void *data) | |
3774 | { | |
eb4a2943 | 3775 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3776 | uint32_t revents, nb_fd; |
3777 | struct lttng_poll_event events; | |
0c89d795 MD |
3778 | struct health_comm_msg msg; |
3779 | struct health_comm_reply reply; | |
44a5e5eb DG |
3780 | |
3781 | DBG("[thread] Manage health check started"); | |
3782 | ||
3783 | rcu_register_thread(); | |
3784 | ||
6d737ce4 DG |
3785 | /* We might hit an error path before this is created. */ |
3786 | lttng_poll_init(&events); | |
3cc04881 | 3787 | |
44a5e5eb DG |
3788 | /* Create unix socket */ |
3789 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3790 | if (sock < 0) { | |
3791 | ERR("Unable to create health check Unix socket"); | |
3792 | ret = -1; | |
3793 | goto error; | |
3794 | } | |
3795 | ||
6c71277b MD |
3796 | if (is_root) { |
3797 | /* lttng health client socket path permissions */ | |
3798 | ret = chown(health_unix_sock_path, 0, | |
3799 | utils_get_group_id(tracing_group_name)); | |
3800 | if (ret < 0) { | |
3801 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3802 | PERROR("chown"); | |
3803 | ret = -1; | |
3804 | goto error; | |
3805 | } | |
3806 | ||
3807 | ret = chmod(health_unix_sock_path, | |
3808 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3809 | if (ret < 0) { | |
3810 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3811 | PERROR("chmod"); | |
3812 | ret = -1; | |
3813 | goto error; | |
3814 | } | |
3815 | } | |
3816 | ||
b662582b DG |
3817 | /* |
3818 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3819 | * show must go on. | |
3820 | */ | |
3821 | (void) utils_set_fd_cloexec(sock); | |
3822 | ||
44a5e5eb DG |
3823 | ret = lttcomm_listen_unix_sock(sock); |
3824 | if (ret < 0) { | |
3825 | goto error; | |
3826 | } | |
3827 | ||
3828 | /* | |
3829 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3830 | * more will be added to this poll set. | |
3831 | */ | |
d0b96690 | 3832 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3833 | if (ret < 0) { |
3834 | goto error; | |
3835 | } | |
3836 | ||
3837 | /* Add the application registration socket */ | |
3838 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3839 | if (ret < 0) { | |
3840 | goto error; | |
3841 | } | |
3842 | ||
ef367a93 | 3843 | sessiond_notify_ready(); |
97bc1426 | 3844 | |
44a5e5eb DG |
3845 | while (1) { |
3846 | DBG("Health check ready"); | |
3847 | ||
44a5e5eb DG |
3848 | /* Inifinite blocking call, waiting for transmission */ |
3849 | restart: | |
3850 | ret = lttng_poll_wait(&events, -1); | |
3851 | if (ret < 0) { | |
3852 | /* | |
3853 | * Restart interrupted system call. | |
3854 | */ | |
3855 | if (errno == EINTR) { | |
3856 | goto restart; | |
3857 | } | |
3858 | goto error; | |
3859 | } | |
3860 | ||
0d9c5d77 DG |
3861 | nb_fd = ret; |
3862 | ||
44a5e5eb DG |
3863 | for (i = 0; i < nb_fd; i++) { |
3864 | /* Fetch once the poll data */ | |
3865 | revents = LTTNG_POLL_GETEV(&events, i); | |
3866 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3867 | ||
6550503d MD |
3868 | if (!revents) { |
3869 | /* No activity for this FD (poll implementation). */ | |
3870 | continue; | |
3871 | } | |
3872 | ||
44a5e5eb | 3873 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3874 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3875 | if (ret) { |
139ac872 MD |
3876 | err = 0; |
3877 | goto exit; | |
44a5e5eb DG |
3878 | } |
3879 | ||
3880 | /* Event on the registration socket */ | |
3881 | if (pollfd == sock) { | |
3882 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3883 | ERR("Health socket poll error"); | |
3884 | goto error; | |
3885 | } | |
3886 | } | |
3887 | } | |
3888 | ||
3889 | new_sock = lttcomm_accept_unix_sock(sock); | |
3890 | if (new_sock < 0) { | |
3891 | goto error; | |
3892 | } | |
3893 | ||
b662582b DG |
3894 | /* |
3895 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3896 | * show must go on. | |
3897 | */ | |
3898 | (void) utils_set_fd_cloexec(new_sock); | |
3899 | ||
44a5e5eb DG |
3900 | DBG("Receiving data from client for health..."); |
3901 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3902 | if (ret <= 0) { | |
3903 | DBG("Nothing recv() from client... continuing"); | |
3904 | ret = close(new_sock); | |
3905 | if (ret) { | |
3906 | PERROR("close"); | |
3907 | } | |
3908 | new_sock = -1; | |
3909 | continue; | |
3910 | } | |
3911 | ||
3912 | rcu_thread_online(); | |
3913 | ||
53efb85a | 3914 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
3915 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
3916 | /* | |
3917 | * health_check_state returns 0 if health is | |
3918 | * bad. | |
3919 | */ | |
3920 | if (!health_check_state(health_sessiond, i)) { | |
3921 | reply.ret_code |= 1ULL << i; | |
3922 | } | |
44a5e5eb DG |
3923 | } |
3924 | ||
6c71277b | 3925 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3926 | |
3927 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3928 | if (ret < 0) { | |
3929 | ERR("Failed to send health data back to client"); | |
3930 | } | |
3931 | ||
3932 | /* End of transmission */ | |
3933 | ret = close(new_sock); | |
3934 | if (ret) { | |
3935 | PERROR("close"); | |
3936 | } | |
3937 | new_sock = -1; | |
3938 | } | |
3939 | ||
139ac872 | 3940 | exit: |
44a5e5eb | 3941 | error: |
139ac872 MD |
3942 | if (err) { |
3943 | ERR("Health error occurred in %s", __func__); | |
3944 | } | |
44a5e5eb DG |
3945 | DBG("Health check thread dying"); |
3946 | unlink(health_unix_sock_path); | |
3947 | if (sock >= 0) { | |
3948 | ret = close(sock); | |
3949 | if (ret) { | |
3950 | PERROR("close"); | |
3951 | } | |
3952 | } | |
44a5e5eb DG |
3953 | |
3954 | lttng_poll_clean(&events); | |
3955 | ||
3956 | rcu_unregister_thread(); | |
3957 | return NULL; | |
3958 | } | |
3959 | ||
1d4b027a | 3960 | /* |
d063d709 DG |
3961 | * This thread manage all clients request using the unix client socket for |
3962 | * communication. | |
1d4b027a DG |
3963 | */ |
3964 | static void *thread_manage_clients(void *data) | |
3965 | { | |
139ac872 | 3966 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3967 | int sock_error; |
5eb91c98 | 3968 | uint32_t revents, nb_fd; |
273ea72c | 3969 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3970 | struct lttng_poll_event events; |
1d4b027a DG |
3971 | |
3972 | DBG("[thread] Manage client started"); | |
3973 | ||
f6a9efaa DG |
3974 | rcu_register_thread(); |
3975 | ||
6c71277b | 3976 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3977 | |
840cb59c | 3978 | health_code_update(); |
44a5e5eb | 3979 | |
1d4b027a DG |
3980 | ret = lttcomm_listen_unix_sock(client_sock); |
3981 | if (ret < 0) { | |
35df2755 | 3982 | goto error_listen; |
1d4b027a DG |
3983 | } |
3984 | ||
5eb91c98 DG |
3985 | /* |
3986 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3987 | * more will be added to this poll set. | |
3988 | */ | |
d0b96690 | 3989 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3990 | if (ret < 0) { |
35df2755 | 3991 | goto error_create_poll; |
5eb91c98 | 3992 | } |
273ea72c | 3993 | |
5eb91c98 DG |
3994 | /* Add the application registration socket */ |
3995 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3996 | if (ret < 0) { | |
3997 | goto error; | |
3998 | } | |
273ea72c | 3999 | |
ef367a93 JG |
4000 | sessiond_notify_ready(); |
4001 | ret = sem_post(&load_info->message_thread_ready); | |
4002 | if (ret) { | |
4003 | PERROR("sem_post message_thread_ready"); | |
4004 | goto error; | |
4005 | } | |
0bb7724a | 4006 | |
72453c8c MD |
4007 | /* This testpoint is after we signal readiness to the parent. */ |
4008 | if (testpoint(sessiond_thread_manage_clients)) { | |
4009 | goto error; | |
4010 | } | |
4011 | ||
e547b070 | 4012 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4013 | goto error; |
4014 | } | |
8ac94142 | 4015 | |
840cb59c | 4016 | health_code_update(); |
44a5e5eb | 4017 | |
1d4b027a | 4018 | while (1) { |
1d4b027a | 4019 | DBG("Accepting client command ..."); |
273ea72c DG |
4020 | |
4021 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4022 | restart: |
a78af745 | 4023 | health_poll_entry(); |
5eb91c98 | 4024 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4025 | health_poll_exit(); |
273ea72c | 4026 | if (ret < 0) { |
88f2b785 MD |
4027 | /* |
4028 | * Restart interrupted system call. | |
4029 | */ | |
4030 | if (errno == EINTR) { | |
4031 | goto restart; | |
4032 | } | |
273ea72c DG |
4033 | goto error; |
4034 | } | |
4035 | ||
0d9c5d77 DG |
4036 | nb_fd = ret; |
4037 | ||
5eb91c98 DG |
4038 | for (i = 0; i < nb_fd; i++) { |
4039 | /* Fetch once the poll data */ | |
4040 | revents = LTTNG_POLL_GETEV(&events, i); | |
4041 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4042 | ||
840cb59c | 4043 | health_code_update(); |
44a5e5eb | 4044 | |
6550503d MD |
4045 | if (!revents) { |
4046 | /* No activity for this FD (poll implementation). */ | |
4047 | continue; | |
4048 | } | |
4049 | ||
5eb91c98 | 4050 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4051 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4052 | if (ret) { |
139ac872 MD |
4053 | err = 0; |
4054 | goto exit; | |
5eb91c98 DG |
4055 | } |
4056 | ||
4057 | /* Event on the registration socket */ | |
4058 | if (pollfd == client_sock) { | |
4059 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
4060 | ERR("Client socket poll error"); | |
4061 | goto error; | |
4062 | } | |
4063 | } | |
4064 | } | |
4065 | ||
4066 | DBG("Wait for client response"); | |
4067 | ||
840cb59c | 4068 | health_code_update(); |
44a5e5eb | 4069 | |
5eb91c98 DG |
4070 | sock = lttcomm_accept_unix_sock(client_sock); |
4071 | if (sock < 0) { | |
273ea72c | 4072 | goto error; |
273ea72c DG |
4073 | } |
4074 | ||
b662582b DG |
4075 | /* |
4076 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4077 | * show must go on. | |
4078 | */ | |
4079 | (void) utils_set_fd_cloexec(sock); | |
4080 | ||
be040666 DG |
4081 | /* Set socket option for credentials retrieval */ |
4082 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4083 | if (ret < 0) { | |
4084 | goto error; | |
4085 | } | |
4086 | ||
5eb91c98 | 4087 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4088 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4089 | if (cmd_ctx == NULL) { |
76d7553f | 4090 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4091 | goto error; |
5eb91c98 | 4092 | } |
1d4b027a | 4093 | |
5eb91c98 | 4094 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4095 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4096 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4097 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4098 | goto error; |
4099 | } | |
1d4b027a | 4100 | |
5eb91c98 DG |
4101 | cmd_ctx->llm = NULL; |
4102 | cmd_ctx->session = NULL; | |
1d4b027a | 4103 | |
840cb59c | 4104 | health_code_update(); |
44a5e5eb | 4105 | |
5eb91c98 DG |
4106 | /* |
4107 | * Data is received from the lttng client. The struct | |
4108 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4109 | * the client. | |
4110 | */ | |
4111 | DBG("Receiving data from client ..."); | |
be040666 DG |
4112 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4113 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4114 | if (ret <= 0) { |
4115 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4116 | ret = close(sock); |
4117 | if (ret) { | |
4118 | PERROR("close"); | |
4119 | } | |
4120 | sock = -1; | |
a2c0da86 | 4121 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4122 | continue; |
4123 | } | |
1d4b027a | 4124 | |
840cb59c | 4125 | health_code_update(); |
44a5e5eb | 4126 | |
5eb91c98 DG |
4127 | // TODO: Validate cmd_ctx including sanity check for |
4128 | // security purpose. | |
f7776ea7 | 4129 | |
f6a9efaa | 4130 | rcu_thread_online(); |
5eb91c98 DG |
4131 | /* |
4132 | * This function dispatch the work to the kernel or userspace tracer | |
4133 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4134 | * informations for the client. The command context struct contains | |
4135 | * everything this function may needs. | |
4136 | */ | |
53a80697 | 4137 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4138 | rcu_thread_offline(); |
5eb91c98 | 4139 | if (ret < 0) { |
36134aa1 DG |
4140 | ret = close(sock); |
4141 | if (ret) { | |
4142 | PERROR("close"); | |
53a80697 | 4143 | } |
36134aa1 | 4144 | sock = -1; |
bbd973c2 | 4145 | /* |
5eb91c98 | 4146 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4147 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4148 | * (ENOMEM). Error detected but still accept |
4149 | * command, unless a socket error has been | |
4150 | * detected. | |
bbd973c2 | 4151 | */ |
bbd973c2 | 4152 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4153 | continue; |
4154 | } | |
d6e4fca4 | 4155 | |
840cb59c | 4156 | health_code_update(); |
44a5e5eb | 4157 | |
54d01ffb DG |
4158 | DBG("Sending response (size: %d, retcode: %s)", |
4159 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 4160 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 4161 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4162 | if (ret < 0) { |
4163 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4164 | } |
1d4b027a | 4165 | |
5eb91c98 | 4166 | /* End of transmission */ |
76d7553f MD |
4167 | ret = close(sock); |
4168 | if (ret) { | |
4169 | PERROR("close"); | |
4170 | } | |
4171 | sock = -1; | |
be040666 DG |
4172 | |
4173 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4174 | |
840cb59c | 4175 | health_code_update(); |
273ea72c DG |
4176 | } |
4177 | ||
139ac872 | 4178 | exit: |
5eb91c98 | 4179 | error: |
35df2755 CB |
4180 | if (sock >= 0) { |
4181 | ret = close(sock); | |
4182 | if (ret) { | |
4183 | PERROR("close"); | |
4184 | } | |
139ac872 | 4185 | } |
44a5e5eb | 4186 | |
35df2755 CB |
4187 | lttng_poll_clean(&events); |
4188 | clean_command_ctx(&cmd_ctx); | |
4189 | ||
4190 | error_listen: | |
4191 | error_create_poll: | |
273ea72c | 4192 | unlink(client_unix_sock_path); |
76d7553f MD |
4193 | if (client_sock >= 0) { |
4194 | ret = close(client_sock); | |
4195 | if (ret) { | |
4196 | PERROR("close"); | |
4197 | } | |
a4b35e07 | 4198 | } |
35df2755 CB |
4199 | |
4200 | if (err) { | |
840cb59c | 4201 | health_error(); |
35df2755 | 4202 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4203 | } |
273ea72c | 4204 | |
8782cc74 | 4205 | health_unregister(health_sessiond); |
35df2755 CB |
4206 | |
4207 | DBG("Client thread dying"); | |
f6a9efaa DG |
4208 | |
4209 | rcu_unregister_thread(); | |
1d4b027a DG |
4210 | return NULL; |
4211 | } | |
4212 | ||
4213 | ||
fac6795d DG |
4214 | /* |
4215 | * usage function on stderr | |
4216 | */ | |
4217 | static void usage(void) | |
4218 | { | |
b716ce68 | 4219 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4220 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4221 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4222 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4223 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4224 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4225 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4226 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4227 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4228 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4229 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4230 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4231 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4232 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 | 4233 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
72dd7491 | 4234 | fprintf(stderr, " -b, --background Start as a daemon, keeping console open.\n"); |
d6f42150 DG |
4235 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); |
4236 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4237 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4238 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4239 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4240 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4241 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4242 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 4243 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
02425e05 | 4244 | fprintf(stderr, " -f --config PATH Load daemon configuration file\n"); |
ef367a93 | 4245 | fprintf(stderr, " -l --load PATH Load session configuration\n"); |
fbb9748b | 4246 | fprintf(stderr, " --kmod-probes Specify kernel module probes to load\n"); |
fac6795d DG |
4247 | } |
4248 | ||
4249 | /* | |
26296c48 JG |
4250 | * Take an option from the getopt output and set it in the right variable to be |
4251 | * used later. | |
4252 | * | |
4253 | * Return 0 on success else a negative value. | |
fac6795d | 4254 | */ |
26296c48 | 4255 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4256 | { |
26296c48 | 4257 | int ret = 0; |
fac6795d | 4258 | |
165aa49a JG |
4259 | if (arg && arg[0] == '\0') { |
4260 | /* | |
4261 | * This only happens if the value is read from daemon config | |
4262 | * file. This means the option requires an argument and the | |
4263 | * configuration file contains a line such as: | |
4264 | * my_option = | |
4265 | */ | |
4266 | ret = -EINVAL; | |
4267 | goto end; | |
4268 | } | |
4269 | ||
26296c48 JG |
4270 | switch (opt) { |
4271 | case 0: | |
4272 | fprintf(stderr, "option %s", optname); | |
4273 | if (arg) { | |
4274 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4275 | } |
26296c48 JG |
4276 | break; |
4277 | case 'c': | |
4278 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4279 | break; | |
4280 | case 'a': | |
4281 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4282 | break; | |
4283 | case 'd': | |
4284 | opt_daemon = 1; | |
4285 | break; | |
72dd7491 MD |
4286 | case 'b': |
4287 | opt_background = 1; | |
4288 | break; | |
26296c48 | 4289 | case 'g': |
bc32011f JG |
4290 | /* |
4291 | * If the override option is set, the pointer points to a | |
4292 | * *non* const thus freeing it even though the variable type is | |
4293 | * set to const. | |
4294 | */ | |
4295 | if (tracing_group_name_override) { | |
4296 | free((void *) tracing_group_name); | |
4297 | } | |
26296c48 | 4298 | tracing_group_name = strdup(arg); |
a64bbfc0 JG |
4299 | if (!tracing_group_name) { |
4300 | perror("strdup"); | |
4301 | ret = -ENOMEM; | |
4302 | } | |
bc32011f | 4303 | tracing_group_name_override = 1; |
26296c48 JG |
4304 | break; |
4305 | case 'h': | |
4306 | usage(); | |
4307 | exit(EXIT_FAILURE); | |
4308 | case 'V': | |
4309 | fprintf(stdout, "%s\n", VERSION); | |
4310 | exit(EXIT_SUCCESS); | |
4311 | case 'S': | |
4312 | opt_sig_parent = 1; | |
4313 | break; | |
4314 | case 'E': | |
4315 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4316 | break; | |
4317 | case 'C': | |
4318 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4319 | break; | |
4320 | case 'F': | |
4321 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4322 | break; | |
4323 | case 'D': | |
4324 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4325 | break; | |
4326 | case 'H': | |
4327 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4328 | break; | |
4329 | case 'G': | |
4330 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4331 | break; | |
4332 | case 'N': | |
4333 | opt_no_kernel = 1; | |
4334 | break; | |
4335 | case 'q': | |
4336 | lttng_opt_quiet = 1; | |
4337 | break; | |
4338 | case 'v': | |
4339 | /* Verbose level can increase using multiple -v */ | |
4340 | if (arg) { | |
95df5340 | 4341 | /* Value obtained from config file */ |
26296c48 JG |
4342 | lttng_opt_verbose = config_parse_value(arg); |
4343 | } else { | |
95df5340 JG |
4344 | /* -v used on command line */ |
4345 | lttng_opt_verbose++; | |
26296c48 | 4346 | } |
95df5340 JG |
4347 | /* Clamp value to [0, 3] */ |
4348 | lttng_opt_verbose = lttng_opt_verbose < 0 ? 0 : | |
4349 | (lttng_opt_verbose <= 3 ? lttng_opt_verbose : 3); | |
26296c48 JG |
4350 | break; |
4351 | case 'Z': | |
4352 | if (arg) { | |
4353 | opt_verbose_consumer = config_parse_value(arg); | |
4354 | } else { | |
3bd1e081 | 4355 | opt_verbose_consumer += 1; |
26296c48 JG |
4356 | } |
4357 | break; | |
4358 | case 'u': | |
bc32011f JG |
4359 | if (consumerd32_bin_override) { |
4360 | free((void *) consumerd32_bin); | |
4361 | } | |
26296c48 | 4362 | consumerd32_bin = strdup(arg); |
a64bbfc0 JG |
4363 | if (!consumerd32_bin) { |
4364 | perror("strdup"); | |
4365 | ret = -ENOMEM; | |
4366 | } | |
26296c48 JG |
4367 | consumerd32_bin_override = 1; |
4368 | break; | |
4369 | case 'U': | |
bc32011f JG |
4370 | if (consumerd32_libdir_override) { |
4371 | free((void *) consumerd32_libdir); | |
4372 | } | |
26296c48 | 4373 | consumerd32_libdir = strdup(arg); |
a64bbfc0 JG |
4374 | if (!consumerd32_libdir) { |
4375 | perror("strdup"); | |
4376 | ret = -ENOMEM; | |
4377 | } | |
26296c48 JG |
4378 | consumerd32_libdir_override = 1; |
4379 | break; | |
4380 | case 't': | |
bc32011f JG |
4381 | if (consumerd64_bin_override) { |
4382 | free((void *) consumerd64_bin); | |
4383 | } | |
26296c48 | 4384 | consumerd64_bin = strdup(arg); |
a64bbfc0 JG |
4385 | if (!consumerd64_bin) { |
4386 | perror("strdup"); | |
4387 | ret = -ENOMEM; | |
4388 | } | |
26296c48 JG |
4389 | consumerd64_bin_override = 1; |
4390 | break; | |
4391 | case 'T': | |
bc32011f JG |
4392 | if (consumerd64_libdir_override) { |
4393 | free((void *) consumerd64_libdir); | |
4394 | } | |
26296c48 | 4395 | consumerd64_libdir = strdup(arg); |
a64bbfc0 JG |
4396 | if (!consumerd64_libdir) { |
4397 | perror("strdup"); | |
4398 | ret = -ENOMEM; | |
4399 | } | |
26296c48 JG |
4400 | consumerd64_libdir_override = 1; |
4401 | break; | |
4402 | case 'p': | |
bc32011f | 4403 | free(opt_pidfile); |
26296c48 | 4404 | opt_pidfile = strdup(arg); |
a64bbfc0 JG |
4405 | if (!opt_pidfile) { |
4406 | perror("strdup"); | |
4407 | ret = -ENOMEM; | |
4408 | } | |
26296c48 JG |
4409 | break; |
4410 | case 'J': /* JUL TCP port. */ | |
4411 | { | |
4412 | unsigned long v; | |
4d076222 | 4413 | |
26296c48 JG |
4414 | errno = 0; |
4415 | v = strtoul(arg, NULL, 0); | |
4416 | if (errno != 0 || !isdigit(arg[0])) { | |
4417 | ERR("Wrong value in --jul-tcp-port parameter: %s", arg); | |
4418 | return -1; | |
4419 | } | |
4420 | if (v == 0 || v >= 65535) { | |
4421 | ERR("Port overflow in --jul-tcp-port parameter: %s", arg); | |
4422 | return -1; | |
4423 | } | |
4424 | jul_tcp_port = (uint32_t) v; | |
4425 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4426 | break; | |
4427 | } | |
ef367a93 | 4428 | case 'l': |
bc32011f | 4429 | free(opt_load_session_path); |
ef367a93 JG |
4430 | opt_load_session_path = strdup(arg); |
4431 | if (!opt_load_session_path) { | |
4432 | perror("strdup"); | |
4433 | ret = -ENOMEM; | |
4434 | } | |
4435 | break; | |
fbb9748b | 4436 | case 'P': /* probe modules list */ |
bc32011f | 4437 | free(kmod_probes_list); |
fbb9748b | 4438 | kmod_probes_list = strdup(arg); |
a64bbfc0 JG |
4439 | if (!kmod_probes_list) { |
4440 | perror("strdup"); | |
4441 | ret = -ENOMEM; | |
4442 | } | |
fbb9748b | 4443 | break; |
7ab02a27 DG |
4444 | case 'f': |
4445 | /* This is handled in set_options() thus silent break. */ | |
4446 | break; | |
26296c48 JG |
4447 | default: |
4448 | /* Unknown option or other error. | |
4449 | * Error is printed by getopt, just return */ | |
4450 | ret = -1; | |
4451 | } | |
4452 | ||
9f7cee56 | 4453 | end: |
165aa49a JG |
4454 | if (ret == -EINVAL) { |
4455 | const char *opt_name = "unknown"; | |
4456 | int i; | |
4457 | ||
4458 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4459 | i++) { | |
4460 | if (opt == long_options[i].val) { | |
4461 | opt_name = long_options[i].name; | |
4462 | break; | |
4463 | } | |
4464 | } | |
4465 | ||
4466 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4467 | opt_name); | |
4468 | } | |
9f7cee56 | 4469 | |
26296c48 JG |
4470 | return ret; |
4471 | } | |
4472 | ||
4473 | /* | |
4474 | * config_entry_handler_cb used to handle options read from a config file. | |
4475 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4476 | * return value conventions. | |
4477 | */ | |
4478 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4479 | { | |
4480 | int ret = 0, i; | |
4481 | ||
4482 | if (!entry || !entry->name || !entry->value) { | |
4483 | ret = -EINVAL; | |
4484 | goto end; | |
4485 | } | |
4486 | ||
4487 | /* Check if the option is to be ignored */ | |
4488 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4489 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4490 | goto end; | |
4491 | } | |
4492 | } | |
4493 | ||
4494 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4495 | i++) { | |
4496 | ||
4497 | /* Ignore if not fully matched. */ | |
4498 | if (strcmp(entry->name, long_options[i].name)) { | |
4499 | continue; | |
4500 | } | |
4501 | ||
4502 | /* | |
4503 | * If the option takes no argument on the command line, we have to | |
4504 | * check if the value is "true". We support non-zero numeric values, | |
4505 | * true, on and yes. | |
4506 | */ | |
4507 | if (!long_options[i].has_arg) { | |
4508 | ret = config_parse_value(entry->value); | |
4509 | if (ret <= 0) { | |
4510 | if (ret) { | |
4511 | WARN("Invalid configuration value \"%s\" for option %s", | |
4512 | entry->value, entry->name); | |
4513 | } | |
4514 | /* False, skip boolean config option. */ | |
4515 | goto end; | |
4d076222 | 4516 | } |
26296c48 JG |
4517 | } |
4518 | ||
4519 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4520 | goto end; | |
4521 | } | |
4522 | ||
4523 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4524 | ||
4525 | end: | |
4526 | return ret; | |
4527 | } | |
4528 | ||
4529 | /* | |
4530 | * daemon configuration loading and argument parsing | |
4531 | */ | |
4532 | static int set_options(int argc, char **argv) | |
4533 | { | |
4534 | int ret = 0, c = 0, option_index = 0; | |
4535 | int orig_optopt = optopt, orig_optind = optind; | |
4536 | char *optstring; | |
4537 | const char *config_path = NULL; | |
4538 | ||
4539 | optstring = utils_generate_optstring(long_options, | |
4540 | sizeof(long_options) / sizeof(struct option)); | |
4541 | if (!optstring) { | |
4542 | ret = -ENOMEM; | |
4543 | goto end; | |
4544 | } | |
4545 | ||
4546 | /* Check for the --config option */ | |
4547 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4548 | &option_index)) != -1) { | |
4549 | if (c == '?') { | |
4550 | ret = -EINVAL; | |
4551 | goto end; | |
4552 | } else if (c != 'f') { | |
4553 | /* if not equal to --config option. */ | |
4554 | continue; | |
4555 | } | |
4556 | ||
4557 | config_path = utils_expand_path(optarg); | |
4558 | if (!config_path) { | |
4559 | ERR("Failed to resolve path: %s", optarg); | |
4560 | } | |
4561 | } | |
4562 | ||
4563 | ret = config_get_section_entries(config_path, config_section_name, | |
4564 | config_entry_handler, NULL); | |
4565 | if (ret) { | |
4566 | if (ret > 0) { | |
4567 | ERR("Invalid configuration option at line %i", ret); | |
4568 | ret = -1; | |
4569 | } | |
4570 | goto end; | |
4571 | } | |
4572 | ||
4573 | /* Reset getopt's global state */ | |
4574 | optopt = orig_optopt; | |
4575 | optind = orig_optind; | |
4576 | while (1) { | |
4577 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4578 | if (c == -1) { | |
4d076222 DG |
4579 | break; |
4580 | } | |
26296c48 JG |
4581 | |
4582 | ret = set_option(c, optarg, long_options[option_index].name); | |
4583 | if (ret < 0) { | |
4584 | break; | |
fac6795d DG |
4585 | } |
4586 | } | |
4587 | ||
26296c48 JG |
4588 | end: |
4589 | free(optstring); | |
4590 | return ret; | |
fac6795d DG |
4591 | } |
4592 | ||
4593 | /* | |
d063d709 | 4594 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4595 | * apps_sock - The communication socket for all UST apps. |
4596 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4597 | */ |
cf3af59e | 4598 | static int init_daemon_socket(void) |
fac6795d DG |
4599 | { |
4600 | int ret = 0; | |
4601 | mode_t old_umask; | |
4602 | ||
4603 | old_umask = umask(0); | |
4604 | ||
4605 | /* Create client tool unix socket */ | |
d6f42150 DG |
4606 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4607 | if (client_sock < 0) { | |
4608 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4609 | ret = -1; |
4610 | goto end; | |
4611 | } | |
4612 | ||
b662582b DG |
4613 | /* Set the cloexec flag */ |
4614 | ret = utils_set_fd_cloexec(client_sock); | |
4615 | if (ret < 0) { | |
4616 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4617 | "Continuing but note that the consumer daemon will have a " | |
4618 | "reference to this socket on exec()", client_sock); | |
4619 | } | |
4620 | ||
fac6795d DG |
4621 | /* File permission MUST be 660 */ |
4622 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4623 | if (ret < 0) { | |
d6f42150 | 4624 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4625 | PERROR("chmod"); |
fac6795d DG |
4626 | goto end; |
4627 | } | |
4628 | ||
4629 | /* Create the application unix socket */ | |
d6f42150 DG |
4630 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4631 | if (apps_sock < 0) { | |
4632 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4633 | ret = -1; |
4634 | goto end; | |
4635 | } | |
4636 | ||
b662582b DG |
4637 | /* Set the cloexec flag */ |
4638 | ret = utils_set_fd_cloexec(apps_sock); | |
4639 | if (ret < 0) { | |
4640 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4641 | "Continuing but note that the consumer daemon will have a " | |
4642 | "reference to this socket on exec()", apps_sock); | |
4643 | } | |
4644 | ||
d6f42150 | 4645 | /* File permission MUST be 666 */ |
54d01ffb DG |
4646 | ret = chmod(apps_unix_sock_path, |
4647 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4648 | if (ret < 0) { |
d6f42150 | 4649 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4650 | PERROR("chmod"); |
fac6795d DG |
4651 | goto end; |
4652 | } | |
4653 | ||
b662582b DG |
4654 | DBG3("Session daemon client socket %d and application socket %d created", |
4655 | client_sock, apps_sock); | |
4656 | ||
fac6795d DG |
4657 | end: |
4658 | umask(old_umask); | |
4659 | return ret; | |
4660 | } | |
4661 | ||
4662 | /* | |
54d01ffb DG |
4663 | * Check if the global socket is available, and if a daemon is answering at the |
4664 | * other side. If yes, error is returned. | |
fac6795d | 4665 | */ |
cf3af59e | 4666 | static int check_existing_daemon(void) |
fac6795d | 4667 | { |
7d8234d9 | 4668 | /* Is there anybody out there ? */ |
099e26bd | 4669 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4670 | return -EEXIST; |
099e26bd | 4671 | } |
b09c7c76 DG |
4672 | |
4673 | return 0; | |
fac6795d DG |
4674 | } |
4675 | ||
fac6795d | 4676 | /* |
d063d709 | 4677 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4678 | * |
d063d709 | 4679 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4680 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4681 | */ |
be040666 | 4682 | static int set_permissions(char *rundir) |
fac6795d DG |
4683 | { |
4684 | int ret; | |
996b65c8 | 4685 | gid_t gid; |
fac6795d | 4686 | |
6c71277b | 4687 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4688 | |
d6f42150 | 4689 | /* Set lttng run dir */ |
be040666 | 4690 | ret = chown(rundir, 0, gid); |
d6f42150 | 4691 | if (ret < 0) { |
be040666 | 4692 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4693 | PERROR("chown"); |
d6f42150 DG |
4694 | } |
4695 | ||
6c71277b MD |
4696 | /* |
4697 | * Ensure all applications and tracing group can search the run | |
4698 | * dir. Allow everyone to read the directory, since it does not | |
4699 | * buy us anything to hide its content. | |
4700 | */ | |
4701 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4702 | if (ret < 0) { |
4703 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4704 | PERROR("chmod"); |
d1613cf5 JN |
4705 | } |
4706 | ||
d6f42150 | 4707 | /* lttng client socket path */ |
996b65c8 | 4708 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4709 | if (ret < 0) { |
d6f42150 | 4710 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4711 | PERROR("chown"); |
d6f42150 DG |
4712 | } |
4713 | ||
3bd1e081 | 4714 | /* kconsumer error socket path */ |
6c71277b | 4715 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4716 | if (ret < 0) { |
3bd1e081 | 4717 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4718 | PERROR("chown"); |
3bd1e081 MD |
4719 | } |
4720 | ||
7753dea8 | 4721 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4722 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4723 | if (ret < 0) { |
4724 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4725 | PERROR("chown"); |
7753dea8 MD |
4726 | } |
4727 | ||
4728 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4729 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4730 | if (ret < 0) { |
7753dea8 | 4731 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4732 | PERROR("chown"); |
fac6795d DG |
4733 | } |
4734 | ||
d6f42150 | 4735 | DBG("All permissions are set"); |
e07ae692 | 4736 | |
fac6795d DG |
4737 | return ret; |
4738 | } | |
4739 | ||
d6f42150 | 4740 | /* |
d063d709 | 4741 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4742 | */ |
67e40797 | 4743 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4744 | { |
4745 | int ret; | |
4746 | ||
67e40797 DG |
4747 | DBG3("Creating LTTng run directory: %s", rundir); |
4748 | ||
d1613cf5 | 4749 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4750 | if (ret < 0) { |
b1f11e69 | 4751 | if (errno != EEXIST) { |
67e40797 | 4752 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4753 | goto error; |
4754 | } else { | |
4755 | ret = 0; | |
4756 | } | |
d6f42150 DG |
4757 | } |
4758 | ||
4759 | error: | |
4760 | return ret; | |
4761 | } | |
4762 | ||
4763 | /* | |
d063d709 DG |
4764 | * Setup sockets and directory needed by the kconsumerd communication with the |
4765 | * session daemon. | |
d6f42150 | 4766 | */ |
67e40797 DG |
4767 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4768 | const char *rundir) | |
d6f42150 DG |
4769 | { |
4770 | int ret; | |
67e40797 | 4771 | char path[PATH_MAX]; |
d6f42150 | 4772 | |
6c71277b | 4773 | switch (consumer_data->type) { |
7753dea8 | 4774 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4775 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4776 | break; |
4777 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4778 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4779 | break; |
4780 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4781 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4782 | break; |
4783 | default: | |
4784 | ERR("Consumer type unknown"); | |
4785 | ret = -EINVAL; | |
4786 | goto error; | |
d6f42150 DG |
4787 | } |
4788 | ||
67e40797 DG |
4789 | DBG2("Creating consumer directory: %s", path); |
4790 | ||
6c71277b | 4791 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4792 | if (ret < 0) { |
6beb2242 | 4793 | if (errno != EEXIST) { |
f11e84c2 | 4794 | PERROR("mkdir"); |
3bd1e081 | 4795 | ERR("Failed to create %s", path); |
6beb2242 DG |
4796 | goto error; |
4797 | } | |
f11e84c2 | 4798 | ret = -1; |
d6f42150 | 4799 | } |
6c71277b MD |
4800 | if (is_root) { |
4801 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4802 | if (ret < 0) { | |
4803 | ERR("Unable to set group on %s", path); | |
4804 | PERROR("chown"); | |
4805 | goto error; | |
4806 | } | |
4807 | } | |
d6f42150 DG |
4808 | |
4809 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4810 | consumer_data->err_sock = |
4811 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4812 | if (consumer_data->err_sock < 0) { | |
4813 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4814 | ret = -1; |
4815 | goto error; | |
4816 | } | |
4817 | ||
a24f05ab MD |
4818 | /* |
4819 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4820 | * show must go on. | |
4821 | */ | |
4822 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4823 | if (ret < 0) { | |
4824 | PERROR("utils_set_fd_cloexec"); | |
4825 | /* continue anyway */ | |
4826 | } | |
4827 | ||
d6f42150 | 4828 | /* File permission MUST be 660 */ |
3bd1e081 | 4829 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4830 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4831 | if (ret < 0) { |
3bd1e081 | 4832 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4833 | PERROR("chmod"); |
d6f42150 DG |
4834 | goto error; |
4835 | } | |
4836 | ||
4837 | error: | |
4838 | return ret; | |
4839 | } | |
4840 | ||
fac6795d | 4841 | /* |
d063d709 | 4842 | * Signal handler for the daemon |
cf3af59e | 4843 | * |
54d01ffb DG |
4844 | * Simply stop all worker threads, leaving main() return gracefully after |
4845 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4846 | */ |
4847 | static void sighandler(int sig) | |
4848 | { | |
4849 | switch (sig) { | |
cf3af59e | 4850 | case SIGPIPE: |
af87c45a | 4851 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4852 | return; |
4853 | case SIGINT: | |
af87c45a | 4854 | DBG("SIGINT caught"); |
cf3af59e MD |
4855 | stop_threads(); |
4856 | break; | |
4857 | case SIGTERM: | |
af87c45a | 4858 | DBG("SIGTERM caught"); |
cf3af59e MD |
4859 | stop_threads(); |
4860 | break; | |
0bb7724a DG |
4861 | case SIGUSR1: |
4862 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4863 | break; | |
cf3af59e MD |
4864 | default: |
4865 | break; | |
fac6795d | 4866 | } |
fac6795d DG |
4867 | } |
4868 | ||
4869 | /* | |
d063d709 | 4870 | * Setup signal handler for : |
1d4b027a | 4871 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4872 | */ |
1d4b027a | 4873 | static int set_signal_handler(void) |
fac6795d | 4874 | { |
1d4b027a DG |
4875 | int ret = 0; |
4876 | struct sigaction sa; | |
4877 | sigset_t sigset; | |
fac6795d | 4878 | |
1d4b027a | 4879 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4880 | PERROR("sigemptyset"); |
1d4b027a DG |
4881 | return ret; |
4882 | } | |
d6f42150 | 4883 | |
1d4b027a DG |
4884 | sa.sa_handler = sighandler; |
4885 | sa.sa_mask = sigset; | |
4886 | sa.sa_flags = 0; | |
4887 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4888 | PERROR("sigaction"); |
1d4b027a | 4889 | return ret; |
d6f42150 DG |
4890 | } |
4891 | ||
1d4b027a | 4892 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4893 | PERROR("sigaction"); |
1d4b027a | 4894 | return ret; |
d6f42150 | 4895 | } |
aaf26714 | 4896 | |
1d4b027a | 4897 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4898 | PERROR("sigaction"); |
1d4b027a | 4899 | return ret; |
8c0faa1d DG |
4900 | } |
4901 | ||
0bb7724a DG |
4902 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4903 | PERROR("sigaction"); | |
4904 | return ret; | |
4905 | } | |
4906 | ||
4907 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4908 | |
4909 | return ret; | |
fac6795d DG |
4910 | } |
4911 | ||
f3ed775e | 4912 | /* |
d063d709 DG |
4913 | * Set open files limit to unlimited. This daemon can open a large number of |
4914 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4915 | */ |
4916 | static void set_ulimit(void) | |
4917 | { | |
4918 | int ret; | |
4919 | struct rlimit lim; | |
4920 | ||
a88df331 | 4921 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4922 | lim.rlim_cur = 65535; |
4923 | lim.rlim_max = 65535; | |
4924 | ||
4925 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4926 | if (ret < 0) { | |
76d7553f | 4927 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4928 | } |
4929 | } | |
4930 | ||
35f90c40 DG |
4931 | /* |
4932 | * Write pidfile using the rundir and opt_pidfile. | |
4933 | */ | |
4934 | static void write_pidfile(void) | |
4935 | { | |
4936 | int ret; | |
4937 | char pidfile_path[PATH_MAX]; | |
4938 | ||
4939 | assert(rundir); | |
4940 | ||
4941 | if (opt_pidfile) { | |
4942 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4943 | } else { | |
4944 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4945 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4946 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4947 | if (ret < 0) { | |
4948 | PERROR("snprintf pidfile path"); | |
4949 | goto error; | |
4950 | } | |
4951 | } | |
4952 | ||
4953 | /* | |
4954 | * Create pid file in rundir. Return value is of no importance. The | |
4955 | * execution will continue even though we are not able to write the file. | |
4956 | */ | |
4957 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4958 | ||
4959 | error: | |
4960 | return; | |
4961 | } | |
4962 | ||
4ef4b5a2 JG |
4963 | /* |
4964 | * Create lockfile using the rundir and return its fd. | |
4965 | */ | |
4966 | static int create_lockfile(void) | |
4967 | { | |
4968 | int ret; | |
4969 | char lockfile_path[PATH_MAX]; | |
4970 | ||
4971 | ret = generate_lock_file_path(lockfile_path, sizeof(lockfile_path)); | |
4972 | if (ret < 0) { | |
4973 | goto error; | |
4974 | } | |
4975 | ||
4976 | ret = utils_create_lock_file(lockfile_path); | |
4977 | error: | |
4978 | return ret; | |
4979 | } | |
4980 | ||
cd9290dd DG |
4981 | /* |
4982 | * Write JUL TCP port using the rundir. | |
4983 | */ | |
4984 | static void write_julport(void) | |
4985 | { | |
4986 | int ret; | |
4987 | char path[PATH_MAX]; | |
4988 | ||
4989 | assert(rundir); | |
4990 | ||
4991 | ret = snprintf(path, sizeof(path), "%s/" | |
4992 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4993 | if (ret < 0) { | |
4994 | PERROR("snprintf julport path"); | |
4995 | goto error; | |
4996 | } | |
4997 | ||
4998 | /* | |
4999 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
5000 | * The execution will continue even though we are not able to write the | |
5001 | * file. | |
5002 | */ | |
5003 | (void) utils_create_pid_file(jul_tcp_port, path); | |
5004 | ||
5005 | error: | |
5006 | return; | |
5007 | } | |
5008 | ||
ef367a93 JG |
5009 | /* |
5010 | * Start the load session thread and dettach from it so the main thread can | |
5011 | * continue. This does not return a value since whatever the outcome, the main | |
5012 | * thread will continue. | |
5013 | */ | |
5014 | static void start_load_session_thread(void) | |
5015 | { | |
5016 | int ret; | |
5017 | ||
5018 | /* Create session loading thread. */ | |
5019 | ret = pthread_create(&load_session_thread, NULL, thread_load_session, | |
5020 | load_info); | |
5021 | if (ret != 0) { | |
5022 | PERROR("pthread_create load_session_thread"); | |
5023 | goto error_create; | |
5024 | } | |
5025 | ||
5026 | ret = pthread_detach(load_session_thread); | |
5027 | if (ret != 0) { | |
5028 | PERROR("pthread_detach load_session_thread"); | |
5029 | } | |
5030 | ||
5031 | /* Everything went well so don't cleanup anything. */ | |
5032 | ||
5033 | error_create: | |
5034 | /* The cleanup() function will destroy the load_info data. */ | |
5035 | return; | |
5036 | } | |
5037 | ||
fac6795d DG |
5038 | /* |
5039 | * main | |
5040 | */ | |
5041 | int main(int argc, char **argv) | |
5042 | { | |
fac6795d DG |
5043 | int ret = 0; |
5044 | void *status; | |
ae9e45b3 | 5045 | const char *home_path, *env_app_timeout; |
fac6795d | 5046 | |
335a95b7 MD |
5047 | init_kernel_workarounds(); |
5048 | ||
f6a9efaa DG |
5049 | rcu_register_thread(); |
5050 | ||
0bb7724a DG |
5051 | if ((ret = set_signal_handler()) < 0) { |
5052 | goto error; | |
5053 | } | |
5054 | ||
7753dea8 | 5055 | setup_consumerd_path(); |
fb09408a | 5056 | |
12744796 DG |
5057 | page_size = sysconf(_SC_PAGESIZE); |
5058 | if (page_size < 0) { | |
5059 | PERROR("sysconf _SC_PAGESIZE"); | |
5060 | page_size = LONG_MAX; | |
5061 | WARN("Fallback page size to %ld", page_size); | |
5062 | } | |
5063 | ||
26296c48 | 5064 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 5065 | progname = argv[0]; |
26296c48 | 5066 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 5067 | goto error; |
fac6795d DG |
5068 | } |
5069 | ||
5070 | /* Daemonize */ | |
72dd7491 | 5071 | if (opt_daemon || opt_background) { |
ceed52b5 MD |
5072 | int i; |
5073 | ||
72dd7491 MD |
5074 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
5075 | !opt_background); | |
53094c05 | 5076 | if (ret < 0) { |
cf3af59e | 5077 | goto error; |
53094c05 | 5078 | } |
0bb7724a | 5079 | |
ceed52b5 | 5080 | /* |
0bb7724a DG |
5081 | * We are in the child. Make sure all other file descriptors are |
5082 | * closed, in case we are called with more opened file descriptors than | |
5083 | * the standard ones. | |
ceed52b5 MD |
5084 | */ |
5085 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5086 | (void) close(i); | |
5087 | } | |
5088 | } | |
5089 | ||
5090 | /* Create thread quit pipe */ | |
5091 | if ((ret = init_thread_quit_pipe()) < 0) { | |
5092 | goto error; | |
fac6795d DG |
5093 | } |
5094 | ||
5095 | /* Check if daemon is UID = 0 */ | |
5096 | is_root = !getuid(); | |
5097 | ||
fac6795d | 5098 | if (is_root) { |
990570ed | 5099 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
097e97d5 MD |
5100 | if (!rundir) { |
5101 | ret = -ENOMEM; | |
5102 | goto error; | |
5103 | } | |
67e40797 DG |
5104 | |
5105 | /* Create global run dir with root access */ | |
5106 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 5107 | if (ret < 0) { |
cf3af59e | 5108 | goto error; |
d6f42150 DG |
5109 | } |
5110 | ||
fac6795d | 5111 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
5112 | snprintf(apps_unix_sock_path, PATH_MAX, |
5113 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
5114 | } |
5115 | ||
5116 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
5117 | snprintf(client_unix_sock_path, PATH_MAX, |
5118 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
5119 | } | |
0fdd1e2c DG |
5120 | |
5121 | /* Set global SHM for ust */ | |
5122 | if (strlen(wait_shm_path) == 0) { | |
5123 | snprintf(wait_shm_path, PATH_MAX, | |
5124 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
5125 | } | |
67e40797 | 5126 | |
44a5e5eb DG |
5127 | if (strlen(health_unix_sock_path) == 0) { |
5128 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5129 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
5130 | } | |
5131 | ||
67e40797 DG |
5132 | /* Setup kernel consumerd path */ |
5133 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5134 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 5135 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5136 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5137 | |
5138 | DBG2("Kernel consumer err path: %s", | |
5139 | kconsumer_data.err_unix_sock_path); | |
5140 | DBG2("Kernel consumer cmd path: %s", | |
5141 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 5142 | } else { |
feb0f3e5 | 5143 | home_path = utils_get_home_dir(); |
b082db07 | 5144 | if (home_path == NULL) { |
273ea72c DG |
5145 | /* TODO: Add --socket PATH option */ |
5146 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
5147 | ret = -EPERM; |
5148 | goto error; | |
b082db07 DG |
5149 | } |
5150 | ||
67e40797 DG |
5151 | /* |
5152 | * Create rundir from home path. This will create something like | |
5153 | * $HOME/.lttng | |
5154 | */ | |
990570ed | 5155 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
5156 | if (ret < 0) { |
5157 | ret = -ENOMEM; | |
5158 | goto error; | |
5159 | } | |
5160 | ||
5161 | ret = create_lttng_rundir(rundir); | |
5162 | if (ret < 0) { | |
5163 | goto error; | |
5164 | } | |
5165 | ||
fac6795d | 5166 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 5167 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 5168 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
5169 | } |
5170 | ||
5171 | /* Set the cli tool unix socket path */ | |
5172 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 5173 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 5174 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 5175 | } |
0fdd1e2c DG |
5176 | |
5177 | /* Set global SHM for ust */ | |
5178 | if (strlen(wait_shm_path) == 0) { | |
5179 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 5180 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 5181 | } |
44a5e5eb DG |
5182 | |
5183 | /* Set health check Unix path */ | |
5184 | if (strlen(health_unix_sock_path) == 0) { | |
5185 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
5186 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
5187 | } | |
fac6795d DG |
5188 | } |
5189 | ||
4ef4b5a2 JG |
5190 | lockfile_fd = create_lockfile(); |
5191 | if (lockfile_fd < 0) { | |
5192 | goto error; | |
5193 | } | |
5194 | ||
5c827ce0 DG |
5195 | /* Set consumer initial state */ |
5196 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5197 | ust_consumerd_state = CONSUMER_STOPPED; | |
5198 | ||
847177cd DG |
5199 | DBG("Client socket path %s", client_unix_sock_path); |
5200 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 5201 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
5202 | DBG("LTTng run directory path: %s", rundir); |
5203 | ||
5204 | /* 32 bits consumerd path setup */ | |
5205 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5206 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 5207 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5208 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5209 | |
5210 | DBG2("UST consumer 32 bits err path: %s", | |
5211 | ustconsumer32_data.err_unix_sock_path); | |
5212 | DBG2("UST consumer 32 bits cmd path: %s", | |
5213 | ustconsumer32_data.cmd_unix_sock_path); | |
5214 | ||
5215 | /* 64 bits consumerd path setup */ | |
5216 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 5217 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 5218 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 5219 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
5220 | |
5221 | DBG2("UST consumer 64 bits err path: %s", | |
5222 | ustconsumer64_data.err_unix_sock_path); | |
5223 | DBG2("UST consumer 64 bits cmd path: %s", | |
5224 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 5225 | |
273ea72c | 5226 | /* |
7d8234d9 | 5227 | * See if daemon already exist. |
fac6795d | 5228 | */ |
7d8234d9 | 5229 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 5230 | ERR("Already running daemon.\n"); |
273ea72c | 5231 | /* |
cf3af59e MD |
5232 | * We do not goto exit because we must not cleanup() |
5233 | * because a daemon is already running. | |
ab118b20 | 5234 | */ |
cf3af59e | 5235 | goto error; |
a88df331 DG |
5236 | } |
5237 | ||
1427f9b2 DG |
5238 | /* |
5239 | * Init UST app hash table. Alloc hash table before this point since | |
5240 | * cleanup() can get called after that point. | |
5241 | */ | |
5242 | ust_app_ht_alloc(); | |
5243 | ||
f20baf8e DG |
5244 | /* Initialize JUL domain subsystem. */ |
5245 | if ((ret = jul_init()) < 0) { | |
5246 | /* ENOMEM at this point. */ | |
5247 | goto error; | |
5248 | } | |
5249 | ||
54d01ffb | 5250 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
5251 | |
5252 | /* | |
5253 | * These actions must be executed as root. We do that *after* setting up | |
5254 | * the sockets path because we MUST make the check for another daemon using | |
5255 | * those paths *before* trying to set the kernel consumer sockets and init | |
5256 | * kernel tracer. | |
5257 | */ | |
5258 | if (is_root) { | |
67e40797 | 5259 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
5260 | if (ret < 0) { |
5261 | goto exit; | |
5262 | } | |
5263 | ||
a88df331 | 5264 | /* Setup kernel tracer */ |
4fba7219 DG |
5265 | if (!opt_no_kernel) { |
5266 | init_kernel_tracer(); | |
5267 | } | |
a88df331 DG |
5268 | |
5269 | /* Set ulimit for open files */ | |
5270 | set_ulimit(); | |
fac6795d | 5271 | } |
4063050c MD |
5272 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5273 | lttng_fd_init(); | |
fac6795d | 5274 | |
67e40797 DG |
5275 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
5276 | if (ret < 0) { | |
5277 | goto exit; | |
5278 | } | |
5279 | ||
5280 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
5281 | if (ret < 0) { | |
5282 | goto exit; | |
5283 | } | |
5284 | ||
d6f42150 | 5285 | /* Setup the needed unix socket */ |
cf3af59e MD |
5286 | if ((ret = init_daemon_socket()) < 0) { |
5287 | goto exit; | |
fac6795d DG |
5288 | } |
5289 | ||
5290 | /* Set credentials to socket */ | |
be040666 | 5291 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 5292 | goto exit; |
fac6795d DG |
5293 | } |
5294 | ||
5b8719f5 DG |
5295 | /* Get parent pid if -S, --sig-parent is specified. */ |
5296 | if (opt_sig_parent) { | |
5297 | ppid = getppid(); | |
5298 | } | |
5299 | ||
7a485870 | 5300 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
5301 | if (is_root && !opt_no_kernel) { |
5302 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
5303 | goto exit; | |
5304 | } | |
7a485870 DG |
5305 | } |
5306 | ||
0b2dc8df MD |
5307 | /* Setup the thread ht_cleanup communication pipe. */ |
5308 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
5309 | goto exit; | |
5310 | } | |
5311 | ||
099e26bd | 5312 | /* Setup the thread apps communication pipe. */ |
ef599319 | 5313 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
5314 | goto exit; |
5315 | } | |
5316 | ||
d0b96690 DG |
5317 | /* Setup the thread apps notify communication pipe. */ |
5318 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
5319 | goto exit; | |
5320 | } | |
5321 | ||
7972aab2 DG |
5322 | /* Initialize global buffer per UID and PID registry. */ |
5323 | buffer_reg_init_uid_registry(); | |
5324 | buffer_reg_init_pid_registry(); | |
5325 | ||
099e26bd DG |
5326 | /* Init UST command queue. */ |
5327 | cds_wfq_init(&ust_cmd_queue.queue); | |
5328 | ||
273ea72c | 5329 | /* |
54d01ffb DG |
5330 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
5331 | * statically declared in session.c | |
273ea72c | 5332 | */ |
54d01ffb | 5333 | session_list_ptr = session_get_list(); |
b5541356 | 5334 | |
5eb91c98 DG |
5335 | /* Set up max poll set size */ |
5336 | lttng_poll_set_max_size(); | |
5337 | ||
2f77fc4b | 5338 | cmd_init(); |
00e2e675 | 5339 | |
ae9e45b3 DG |
5340 | /* Check for the application socket timeout env variable. */ |
5341 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5342 | if (env_app_timeout) { | |
5343 | app_socket_timeout = atoi(env_app_timeout); | |
5344 | } else { | |
5345 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5346 | } | |
5347 | ||
35f90c40 | 5348 | write_pidfile(); |
cd9290dd | 5349 | write_julport(); |
35f90c40 | 5350 | |
554831e7 MD |
5351 | /* Initialize communication library */ |
5352 | lttcomm_init(); | |
d831c249 DG |
5353 | /* This is to get the TCP timeout value. */ |
5354 | lttcomm_inet_init(); | |
554831e7 | 5355 | |
ef367a93 JG |
5356 | if (load_session_init_data(&load_info) < 0) { |
5357 | goto exit; | |
5358 | } | |
5359 | load_info->path = opt_load_session_path; | |
5360 | ||
67e05644 DG |
5361 | /* |
5362 | * Initialize the health check subsystem. This call should set the | |
5363 | * appropriate time values. | |
5364 | */ | |
6c71277b | 5365 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5366 | if (!health_sessiond) { |
5367 | PERROR("health_app_create error"); | |
5368 | goto exit_health_sessiond_cleanup; | |
5369 | } | |
67e05644 | 5370 | |
d5b9fd2f | 5371 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5372 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5373 | thread_ht_cleanup, (void *) NULL); | |
5374 | if (ret != 0) { | |
5375 | PERROR("pthread_create ht_cleanup"); | |
5376 | goto exit_ht_cleanup; | |
5377 | } | |
5378 | ||
d5b9fd2f | 5379 | /* Create health-check thread */ |
44a5e5eb DG |
5380 | ret = pthread_create(&health_thread, NULL, |
5381 | thread_manage_health, (void *) NULL); | |
5382 | if (ret != 0) { | |
5383 | PERROR("pthread_create health"); | |
5384 | goto exit_health; | |
5385 | } | |
5386 | ||
cf3af59e | 5387 | /* Create thread to manage the client socket */ |
099e26bd DG |
5388 | ret = pthread_create(&client_thread, NULL, |
5389 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5390 | if (ret != 0) { |
76d7553f | 5391 | PERROR("pthread_create clients"); |
cf3af59e MD |
5392 | goto exit_client; |
5393 | } | |
fac6795d | 5394 | |
099e26bd DG |
5395 | /* Create thread to dispatch registration */ |
5396 | ret = pthread_create(&dispatch_thread, NULL, | |
5397 | thread_dispatch_ust_registration, (void *) NULL); | |
5398 | if (ret != 0) { | |
76d7553f | 5399 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5400 | goto exit_dispatch; |
5401 | } | |
5402 | ||
5403 | /* Create thread to manage application registration. */ | |
5404 | ret = pthread_create(®_apps_thread, NULL, | |
5405 | thread_registration_apps, (void *) NULL); | |
5406 | if (ret != 0) { | |
76d7553f | 5407 | PERROR("pthread_create registration"); |
099e26bd DG |
5408 | goto exit_reg_apps; |
5409 | } | |
5410 | ||
cf3af59e | 5411 | /* Create thread to manage application socket */ |
54d01ffb DG |
5412 | ret = pthread_create(&apps_thread, NULL, |
5413 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5414 | if (ret != 0) { |
d0b96690 DG |
5415 | PERROR("pthread_create apps"); |
5416 | goto exit_apps; | |
5417 | } | |
5418 | ||
5419 | /* Create thread to manage application notify socket */ | |
5420 | ret = pthread_create(&apps_notify_thread, NULL, | |
5421 | ust_thread_manage_notify, (void *) NULL); | |
5422 | if (ret != 0) { | |
f5c32ef1 | 5423 | PERROR("pthread_create notify"); |
9563b0ad | 5424 | goto exit_apps_notify; |
cf3af59e | 5425 | } |
fac6795d | 5426 | |
4d076222 DG |
5427 | /* Create JUL registration thread. */ |
5428 | ret = pthread_create(&jul_reg_thread, NULL, | |
5429 | jul_thread_manage_registration, (void *) NULL); | |
5430 | if (ret != 0) { | |
f5c32ef1 | 5431 | PERROR("pthread_create JUL"); |
4d076222 DG |
5432 | goto exit_jul_reg; |
5433 | } | |
5434 | ||
6620da75 DG |
5435 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5436 | if (is_root && !opt_no_kernel) { | |
5437 | /* Create kernel thread to manage kernel event */ | |
5438 | ret = pthread_create(&kernel_thread, NULL, | |
5439 | thread_manage_kernel, (void *) NULL); | |
5440 | if (ret != 0) { | |
5441 | PERROR("pthread_create kernel"); | |
5442 | goto exit_kernel; | |
5443 | } | |
ef367a93 | 5444 | } |
7a485870 | 5445 | |
ef367a93 JG |
5446 | /* Load possible session(s). */ |
5447 | start_load_session_thread(); | |
5448 | ||
5449 | if (is_root && !opt_no_kernel) { | |
6620da75 DG |
5450 | ret = pthread_join(kernel_thread, &status); |
5451 | if (ret != 0) { | |
5452 | PERROR("pthread_join"); | |
5453 | goto error; /* join error, exit without cleanup */ | |
5454 | } | |
fac6795d DG |
5455 | } |
5456 | ||
cf3af59e | 5457 | exit_kernel: |
4d076222 DG |
5458 | ret = pthread_join(jul_reg_thread, &status); |
5459 | if (ret != 0) { | |
5460 | PERROR("pthread_join JUL"); | |
5461 | goto error; /* join error, exit without cleanup */ | |
5462 | } | |
5463 | ||
5464 | exit_jul_reg: | |
9563b0ad DG |
5465 | ret = pthread_join(apps_notify_thread, &status); |
5466 | if (ret != 0) { | |
5467 | PERROR("pthread_join apps notify"); | |
5468 | goto error; /* join error, exit without cleanup */ | |
5469 | } | |
5470 | ||
5471 | exit_apps_notify: | |
cf3af59e MD |
5472 | ret = pthread_join(apps_thread, &status); |
5473 | if (ret != 0) { | |
9563b0ad | 5474 | PERROR("pthread_join apps"); |
cf3af59e MD |
5475 | goto error; /* join error, exit without cleanup */ |
5476 | } | |
fac6795d | 5477 | |
4ccd8c8f | 5478 | |
cf3af59e | 5479 | exit_apps: |
099e26bd DG |
5480 | ret = pthread_join(reg_apps_thread, &status); |
5481 | if (ret != 0) { | |
76d7553f | 5482 | PERROR("pthread_join"); |
099e26bd DG |
5483 | goto error; /* join error, exit without cleanup */ |
5484 | } | |
5485 | ||
5486 | exit_reg_apps: | |
5487 | ret = pthread_join(dispatch_thread, &status); | |
5488 | if (ret != 0) { | |
76d7553f | 5489 | PERROR("pthread_join"); |
099e26bd DG |
5490 | goto error; /* join error, exit without cleanup */ |
5491 | } | |
5492 | ||
5493 | exit_dispatch: | |
cf3af59e MD |
5494 | ret = pthread_join(client_thread, &status); |
5495 | if (ret != 0) { | |
76d7553f | 5496 | PERROR("pthread_join"); |
cf3af59e MD |
5497 | goto error; /* join error, exit without cleanup */ |
5498 | } | |
5499 | ||
3bd1e081 | 5500 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5501 | if (ret != 0) { |
76d7553f | 5502 | PERROR("join_consumer"); |
cf3af59e MD |
5503 | goto error; /* join error, exit without cleanup */ |
5504 | } | |
a88df331 | 5505 | |
06f525de DG |
5506 | ret = join_consumer_thread(&ustconsumer32_data); |
5507 | if (ret != 0) { | |
5508 | PERROR("join_consumer ust32"); | |
5509 | goto error; /* join error, exit without cleanup */ | |
5510 | } | |
5511 | ||
5512 | ret = join_consumer_thread(&ustconsumer64_data); | |
5513 | if (ret != 0) { | |
5514 | PERROR("join_consumer ust64"); | |
5515 | goto error; /* join error, exit without cleanup */ | |
5516 | } | |
5517 | ||
cf3af59e | 5518 | exit_client: |
06f525de DG |
5519 | ret = pthread_join(health_thread, &status); |
5520 | if (ret != 0) { | |
5521 | PERROR("pthread_join health thread"); | |
5522 | goto error; /* join error, exit without cleanup */ | |
5523 | } | |
5524 | ||
44a5e5eb | 5525 | exit_health: |
0b2dc8df MD |
5526 | ret = pthread_join(ht_cleanup_thread, &status); |
5527 | if (ret != 0) { | |
5528 | PERROR("pthread_join ht cleanup thread"); | |
5529 | goto error; /* join error, exit without cleanup */ | |
5530 | } | |
5531 | exit_ht_cleanup: | |
8782cc74 MD |
5532 | health_app_destroy(health_sessiond); |
5533 | exit_health_sessiond_cleanup: | |
a88df331 | 5534 | exit: |
cf3af59e MD |
5535 | /* |
5536 | * cleanup() is called when no other thread is running. | |
5537 | */ | |
f6a9efaa | 5538 | rcu_thread_online(); |
cf3af59e | 5539 | cleanup(); |
f6a9efaa DG |
5540 | rcu_thread_offline(); |
5541 | rcu_unregister_thread(); | |
67e40797 | 5542 | if (!ret) { |
cf3af59e | 5543 | exit(EXIT_SUCCESS); |
67e40797 | 5544 | } |
cf3af59e | 5545 | error: |
5e16da05 | 5546 | exit(EXIT_FAILURE); |
fac6795d | 5547 | } |