Commit | Line | Data |
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826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
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> |
26296c48 | 49 | #include <common/config/config.h> |
fac6795d | 50 | |
10a8a223 | 51 | #include "lttng-sessiond.h" |
7972aab2 | 52 | #include "buffer-registry.h" |
54d01ffb | 53 | #include "channel.h" |
2f77fc4b | 54 | #include "cmd.h" |
00e2e675 | 55 | #include "consumer.h" |
099e26bd | 56 | #include "context.h" |
54d01ffb | 57 | #include "event.h" |
4771f025 | 58 | #include "kernel.h" |
f1e16794 | 59 | #include "kernel-consumer.h" |
096102bd | 60 | #include "modprobe.h" |
0fdd1e2c | 61 | #include "shm.h" |
1e307fab | 62 | #include "ust-ctl.h" |
00e2e675 | 63 | #include "ust-consumer.h" |
8e68d1c8 | 64 | #include "utils.h" |
4063050c | 65 | #include "fd-limit.h" |
8782cc74 | 66 | #include "health-sessiond.h" |
8ac94142 | 67 | #include "testpoint.h" |
d0b96690 | 68 | #include "ust-thread.h" |
4d076222 | 69 | #include "jul-thread.h" |
fac6795d | 70 | |
ebaeda94 MD |
71 | #define CONSUMERD_FILE "lttng-consumerd" |
72 | ||
fac6795d | 73 | const char *progname; |
6c71277b | 74 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
26296c48 JG |
75 | static int tracing_group_name_override; |
76 | static char *opt_pidfile; | |
5b8719f5 | 77 | static int opt_sig_parent; |
97e19046 | 78 | static int opt_verbose_consumer; |
fac6795d | 79 | static int opt_daemon; |
4fba7219 | 80 | static int opt_no_kernel; |
fac6795d | 81 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 82 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 83 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
67e40797 | 84 | static char *rundir; |
3bd1e081 | 85 | |
0bb7724a DG |
86 | /* Set to 1 when a SIGUSR1 signal is received. */ |
87 | static int recv_child_signal; | |
88 | ||
a23ec3a7 DG |
89 | /* |
90 | * Consumer daemon specific control data. Every value not initialized here is | |
91 | * set to 0 by the static definition. | |
92 | */ | |
3bd1e081 MD |
93 | static struct consumer_data kconsumer_data = { |
94 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
95 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
96 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
97 | .err_sock = -1, |
98 | .cmd_sock = -1, | |
173af62f DG |
99 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
100 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
101 | .cond = PTHREAD_COND_INITIALIZER, |
102 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 103 | }; |
7753dea8 MD |
104 | static struct consumer_data ustconsumer64_data = { |
105 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
106 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
107 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
108 | .err_sock = -1, |
109 | .cmd_sock = -1, | |
173af62f DG |
110 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
111 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
112 | .cond = PTHREAD_COND_INITIALIZER, |
113 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
114 | }; |
115 | static struct consumer_data ustconsumer32_data = { | |
116 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
117 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
118 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
119 | .err_sock = -1, |
120 | .cmd_sock = -1, | |
173af62f DG |
121 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
122 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
123 | .cond = PTHREAD_COND_INITIALIZER, |
124 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
125 | }; |
126 | ||
26296c48 JG |
127 | /* Command line options */ |
128 | static const struct option long_options[] = { | |
129 | { "client-sock", 1, 0, 'c' }, | |
130 | { "apps-sock", 1, 0, 'a' }, | |
131 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, | |
132 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
133 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, | |
134 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
135 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, | |
136 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
137 | { "consumerd32-path", 1, 0, 'u' }, | |
138 | { "consumerd32-libdir", 1, 0, 'U' }, | |
139 | { "consumerd64-path", 1, 0, 't' }, | |
140 | { "consumerd64-libdir", 1, 0, 'T' }, | |
141 | { "daemonize", 0, 0, 'd' }, | |
142 | { "sig-parent", 0, 0, 'S' }, | |
143 | { "help", 0, 0, 'h' }, | |
144 | { "group", 1, 0, 'g' }, | |
145 | { "version", 0, 0, 'V' }, | |
146 | { "quiet", 0, 0, 'q' }, | |
147 | { "verbose", 0, 0, 'v' }, | |
148 | { "verbose-consumer", 0, 0, 'Z' }, | |
149 | { "no-kernel", 0, 0, 'N' }, | |
150 | { "pidfile", 1, 0, 'p' }, | |
151 | { "jul-tcp-port", 1, 0, 'J' }, | |
152 | { "config", 1, 0, 'f' }, | |
153 | { NULL, 0, 0, 0 } | |
154 | }; | |
155 | ||
156 | /* Command line options to ignore from configuration file */ | |
157 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
158 | ||
26c9d55e | 159 | /* Shared between threads */ |
099e26bd | 160 | static int dispatch_thread_exit; |
fac6795d | 161 | |
54d01ffb DG |
162 | /* Global application Unix socket path */ |
163 | static char apps_unix_sock_path[PATH_MAX]; | |
164 | /* Global client Unix socket path */ | |
165 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
166 | /* global wait shm path for UST */ |
167 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
168 | /* Global health check unix path */ |
169 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 170 | |
1d4b027a | 171 | /* Sockets and FDs */ |
a4b35e07 MD |
172 | static int client_sock = -1; |
173 | static int apps_sock = -1; | |
2f77fc4b | 174 | int kernel_tracer_fd = -1; |
76d7553f | 175 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 176 | |
273ea72c DG |
177 | /* |
178 | * Quit pipe for all threads. This permits a single cancellation point | |
179 | * for all threads when receiving an event on the pipe. | |
180 | */ | |
76d7553f | 181 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 182 | |
099e26bd DG |
183 | /* |
184 | * This pipe is used to inform the thread managing application communication | |
185 | * that a command is queued and ready to be processed. | |
186 | */ | |
76d7553f | 187 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 188 | |
d0b96690 DG |
189 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
190 | ||
1d4b027a | 191 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 192 | static pthread_t apps_thread; |
d0b96690 | 193 | static pthread_t apps_notify_thread; |
099e26bd | 194 | static pthread_t reg_apps_thread; |
1d4b027a | 195 | static pthread_t client_thread; |
7a485870 | 196 | static pthread_t kernel_thread; |
099e26bd | 197 | static pthread_t dispatch_thread; |
44a5e5eb | 198 | static pthread_t health_thread; |
0b2dc8df | 199 | static pthread_t ht_cleanup_thread; |
4d076222 | 200 | static pthread_t jul_reg_thread; |
5eb91c98 | 201 | |
099e26bd DG |
202 | /* |
203 | * UST registration command queue. This queue is tied with a futex and uses a N | |
204 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
205 | * | |
206 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
207 | * this queue and the wait/wake scheme. | |
208 | */ | |
209 | static struct ust_cmd_queue ust_cmd_queue; | |
210 | ||
b5541356 DG |
211 | /* |
212 | * Pointer initialized before thread creation. | |
213 | * | |
214 | * This points to the tracing session list containing the session count and a | |
215 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
216 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 217 | * |
d063d709 | 218 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 219 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
220 | */ |
221 | static struct ltt_session_list *session_list_ptr; | |
222 | ||
7753dea8 MD |
223 | int ust_consumerd64_fd = -1; |
224 | int ust_consumerd32_fd = -1; | |
225 | ||
fb6f1fa2 YB |
226 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
227 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
228 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
229 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
26296c48 JG |
230 | static int consumerd32_bin_override; |
231 | static int consumerd64_bin_override; | |
232 | static int consumerd32_libdir_override; | |
233 | static int consumerd64_libdir_override; | |
fb09408a | 234 | |
2f77fc4b DG |
235 | static const char *module_proc_lttng = "/proc/lttng"; |
236 | ||
5c827ce0 DG |
237 | /* |
238 | * Consumer daemon state which is changed when spawning it, killing it or in | |
239 | * case of a fatal error. | |
240 | */ | |
241 | enum consumerd_state { | |
242 | CONSUMER_STARTED = 1, | |
243 | CONSUMER_STOPPED = 2, | |
244 | CONSUMER_ERROR = 3, | |
245 | }; | |
246 | ||
247 | /* | |
248 | * This consumer daemon state is used to validate if a client command will be | |
249 | * able to reach the consumer. If not, the client is informed. For instance, | |
250 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
251 | * error to the client. | |
252 | * | |
253 | * The following example shows a possible race condition of this scheme: | |
254 | * | |
255 | * consumer thread error happens | |
256 | * client cmd arrives | |
257 | * client cmd checks state -> still OK | |
258 | * consumer thread exit, sets error | |
259 | * client cmd try to talk to consumer | |
260 | * ... | |
261 | * | |
262 | * However, since the consumer is a different daemon, we have no way of making | |
263 | * sure the command will reach it safely even with this state flag. This is why | |
264 | * we consider that up to the state validation during command processing, the | |
265 | * command is safe. After that, we can not guarantee the correctness of the | |
266 | * client request vis-a-vis the consumer. | |
267 | */ | |
268 | static enum consumerd_state ust_consumerd_state; | |
269 | static enum consumerd_state kernel_consumerd_state; | |
270 | ||
ae9e45b3 DG |
271 | /* |
272 | * Socket timeout for receiving and sending in seconds. | |
273 | */ | |
274 | static int app_socket_timeout; | |
275 | ||
12744796 DG |
276 | /* Set in main() with the current page size. */ |
277 | long page_size; | |
278 | ||
8782cc74 MD |
279 | /* Application health monitoring */ |
280 | struct health_app *health_sessiond; | |
281 | ||
4d076222 DG |
282 | /* JUL TCP port for registration. Used by the JUL thread. */ |
283 | unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT; | |
284 | ||
26296c48 JG |
285 | const char * const config_section_name = "sessiond"; |
286 | ||
fb09408a | 287 | static |
7753dea8 | 288 | void setup_consumerd_path(void) |
fb09408a | 289 | { |
fc7a59ce | 290 | const char *bin, *libdir; |
fb09408a | 291 | |
7753dea8 MD |
292 | /* |
293 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
294 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
295 | * has not been defined. | |
7753dea8 | 296 | */ |
ebaeda94 | 297 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
298 | if (!consumerd32_bin[0]) { |
299 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
300 | } |
301 | if (!consumerd32_libdir[0]) { | |
302 | consumerd32_libdir = INSTALL_LIB_PATH; | |
303 | } | |
304 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
305 | if (!consumerd64_bin[0]) { |
306 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 307 | } |
ebaeda94 MD |
308 | if (!consumerd64_libdir[0]) { |
309 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
310 | } |
311 | #else | |
312 | #error "Unknown bitness" | |
313 | #endif | |
314 | ||
fb09408a MD |
315 | /* |
316 | * runtime env. var. overrides the build default. | |
317 | */ | |
fc7a59ce AM |
318 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
319 | if (bin) { | |
320 | consumerd32_bin = bin; | |
7753dea8 | 321 | } |
fc7a59ce AM |
322 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
323 | if (bin) { | |
324 | consumerd64_bin = bin; | |
ebaeda94 | 325 | } |
72f579ee | 326 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
327 | if (libdir) { |
328 | consumerd32_libdir = libdir; | |
329 | } | |
72f579ee | 330 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
331 | if (libdir) { |
332 | consumerd64_libdir = libdir; | |
fb09408a MD |
333 | } |
334 | } | |
335 | ||
5eb91c98 DG |
336 | /* |
337 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
338 | */ | |
d0b96690 | 339 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
340 | { |
341 | int ret; | |
342 | ||
d0b96690 | 343 | assert(events); |
5eb91c98 DG |
344 | |
345 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
346 | if (ret < 0) { | |
347 | goto error; | |
348 | } | |
349 | ||
350 | /* Add quit pipe */ | |
d0b96690 | 351 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
352 | if (ret < 0) { |
353 | goto error; | |
354 | } | |
355 | ||
356 | return 0; | |
357 | ||
358 | error: | |
359 | return ret; | |
360 | } | |
361 | ||
362 | /* | |
363 | * Check if the thread quit pipe was triggered. | |
364 | * | |
365 | * Return 1 if it was triggered else 0; | |
366 | */ | |
d0b96690 | 367 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
368 | { |
369 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
370 | return 1; | |
371 | } | |
372 | ||
373 | return 0; | |
374 | } | |
375 | ||
273ea72c | 376 | /* |
5eb91c98 | 377 | * Init thread quit pipe. |
273ea72c DG |
378 | * |
379 | * Return -1 on error or 0 if all pipes are created. | |
380 | */ | |
381 | static int init_thread_quit_pipe(void) | |
382 | { | |
730389d9 | 383 | int ret, i; |
273ea72c | 384 | |
730389d9 | 385 | ret = pipe(thread_quit_pipe); |
273ea72c | 386 | if (ret < 0) { |
730389d9 | 387 | PERROR("thread quit pipe"); |
273ea72c DG |
388 | goto error; |
389 | } | |
390 | ||
730389d9 DG |
391 | for (i = 0; i < 2; i++) { |
392 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
393 | if (ret < 0) { | |
394 | PERROR("fcntl"); | |
395 | goto error; | |
396 | } | |
397 | } | |
398 | ||
273ea72c DG |
399 | error: |
400 | return ret; | |
401 | } | |
402 | ||
099e26bd DG |
403 | /* |
404 | * Stop all threads by closing the thread quit pipe. | |
405 | */ | |
cf3af59e MD |
406 | static void stop_threads(void) |
407 | { | |
5eb91c98 DG |
408 | int ret; |
409 | ||
cf3af59e MD |
410 | /* Stopping all threads */ |
411 | DBG("Terminating all threads"); | |
54d01ffb | 412 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
413 | if (ret < 0) { |
414 | ERR("write error on thread quit pipe"); | |
415 | } | |
416 | ||
099e26bd | 417 | /* Dispatch thread */ |
26c9d55e | 418 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 419 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
420 | } |
421 | ||
e975f9f8 DG |
422 | /* |
423 | * Close every consumer sockets. | |
424 | */ | |
425 | static void close_consumer_sockets(void) | |
426 | { | |
427 | int ret; | |
428 | ||
429 | if (kconsumer_data.err_sock >= 0) { | |
430 | ret = close(kconsumer_data.err_sock); | |
431 | if (ret < 0) { | |
432 | PERROR("kernel consumer err_sock close"); | |
433 | } | |
434 | } | |
435 | if (ustconsumer32_data.err_sock >= 0) { | |
436 | ret = close(ustconsumer32_data.err_sock); | |
437 | if (ret < 0) { | |
a76cbd9f | 438 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
439 | } |
440 | } | |
441 | if (ustconsumer64_data.err_sock >= 0) { | |
442 | ret = close(ustconsumer64_data.err_sock); | |
443 | if (ret < 0) { | |
a76cbd9f | 444 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
445 | } |
446 | } | |
447 | if (kconsumer_data.cmd_sock >= 0) { | |
448 | ret = close(kconsumer_data.cmd_sock); | |
449 | if (ret < 0) { | |
450 | PERROR("kernel consumer cmd_sock close"); | |
451 | } | |
452 | } | |
453 | if (ustconsumer32_data.cmd_sock >= 0) { | |
454 | ret = close(ustconsumer32_data.cmd_sock); | |
455 | if (ret < 0) { | |
a76cbd9f | 456 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
457 | } |
458 | } | |
459 | if (ustconsumer64_data.cmd_sock >= 0) { | |
460 | ret = close(ustconsumer64_data.cmd_sock); | |
461 | if (ret < 0) { | |
a76cbd9f | 462 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
463 | } |
464 | } | |
465 | } | |
466 | ||
fac6795d | 467 | /* |
d063d709 | 468 | * Cleanup the daemon |
fac6795d | 469 | */ |
cf3af59e | 470 | static void cleanup(void) |
fac6795d | 471 | { |
ef599319 | 472 | int ret; |
af9737e9 | 473 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 474 | char path[PATH_MAX]; |
fac6795d | 475 | |
1d4b027a | 476 | DBG("Cleaning up"); |
e07ae692 | 477 | |
4e449f3f MD |
478 | /* |
479 | * Close the thread quit pipe. It has already done its job, | |
480 | * since we are now called. | |
481 | */ | |
2f77fc4b DG |
482 | utils_close_pipe(thread_quit_pipe); |
483 | ||
35f90c40 DG |
484 | /* |
485 | * If opt_pidfile is undefined, the default file will be wiped when | |
486 | * removing the rundir. | |
487 | */ | |
488 | if (opt_pidfile) { | |
489 | ret = remove(opt_pidfile); | |
490 | if (ret < 0) { | |
491 | PERROR("remove pidfile %s", opt_pidfile); | |
492 | } | |
493 | } | |
494 | ||
8c6c56c2 MD |
495 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
496 | ||
497 | /* sessiond */ | |
498 | snprintf(path, PATH_MAX, | |
499 | "%s/%s", | |
500 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
501 | DBG("Removing %s", path); | |
502 | (void) unlink(path); | |
503 | ||
cd9290dd DG |
504 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
505 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE); | |
506 | DBG("Removing %s", path); | |
507 | (void) unlink(path); | |
508 | ||
8c6c56c2 MD |
509 | /* kconsumerd */ |
510 | snprintf(path, PATH_MAX, | |
511 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
512 | rundir); | |
513 | DBG("Removing %s", path); | |
514 | (void) unlink(path); | |
515 | ||
516 | snprintf(path, PATH_MAX, | |
517 | DEFAULT_KCONSUMERD_PATH, | |
518 | rundir); | |
519 | DBG("Removing directory %s", path); | |
520 | (void) rmdir(path); | |
521 | ||
522 | /* ust consumerd 32 */ | |
523 | snprintf(path, PATH_MAX, | |
524 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
525 | rundir); | |
526 | DBG("Removing %s", path); | |
527 | (void) unlink(path); | |
528 | ||
529 | snprintf(path, PATH_MAX, | |
530 | DEFAULT_USTCONSUMERD32_PATH, | |
531 | rundir); | |
532 | DBG("Removing directory %s", path); | |
533 | (void) rmdir(path); | |
534 | ||
535 | /* ust consumerd 64 */ | |
536 | snprintf(path, PATH_MAX, | |
537 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
538 | rundir); | |
539 | DBG("Removing %s", path); | |
540 | (void) unlink(path); | |
541 | ||
542 | snprintf(path, PATH_MAX, | |
543 | DEFAULT_USTCONSUMERD64_PATH, | |
544 | rundir); | |
545 | DBG("Removing directory %s", path); | |
546 | (void) rmdir(path); | |
5461b305 | 547 | |
dcbcae3e MD |
548 | /* |
549 | * We do NOT rmdir rundir because there are other processes | |
550 | * using it, for instance lttng-relayd, which can start in | |
551 | * parallel with this teardown. | |
552 | */ | |
553 | ||
bd69add2 | 554 | free(rundir); |
5461b305 | 555 | |
99bab54f | 556 | DBG("Cleaning up all sessions"); |
fac6795d | 557 | |
b5541356 | 558 | /* Destroy session list mutex */ |
273ea72c DG |
559 | if (session_list_ptr != NULL) { |
560 | pthread_mutex_destroy(&session_list_ptr->lock); | |
561 | ||
562 | /* Cleanup ALL session */ | |
54d01ffb DG |
563 | cds_list_for_each_entry_safe(sess, stmp, |
564 | &session_list_ptr->head, list) { | |
2f77fc4b | 565 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
566 | } |
567 | } | |
568 | ||
099e26bd | 569 | DBG("Closing all UST sockets"); |
56fff090 | 570 | ust_app_clean_list(); |
7972aab2 | 571 | buffer_reg_destroy_registries(); |
099e26bd | 572 | |
4fba7219 DG |
573 | if (is_root && !opt_no_kernel) { |
574 | DBG2("Closing kernel fd"); | |
a4b35e07 | 575 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
576 | ret = close(kernel_tracer_fd); |
577 | if (ret) { | |
578 | PERROR("close"); | |
579 | } | |
a4b35e07 | 580 | } |
2f50c8a3 | 581 | DBG("Unloading kernel modules"); |
096102bd | 582 | modprobe_remove_lttng_all(); |
2f50c8a3 | 583 | } |
2f77fc4b | 584 | |
e975f9f8 DG |
585 | close_consumer_sockets(); |
586 | ||
26296c48 JG |
587 | /* |
588 | * If the override option is set, the pointer points to a *non* const thus | |
589 | * freeing it even though the variable type is set to const. | |
590 | */ | |
591 | if (tracing_group_name_override) { | |
592 | free((void *) tracing_group_name); | |
593 | } | |
594 | if (consumerd32_bin_override) { | |
595 | free((void *) consumerd32_bin); | |
596 | } | |
597 | if (consumerd64_bin_override) { | |
598 | free((void *) consumerd64_bin); | |
599 | } | |
600 | if (consumerd32_libdir_override) { | |
601 | free((void *) consumerd32_libdir); | |
602 | } | |
603 | if (consumerd64_libdir_override) { | |
604 | free((void *) consumerd64_libdir); | |
605 | } | |
606 | ||
607 | if (opt_pidfile) { | |
608 | free(opt_pidfile); | |
609 | } | |
610 | ||
421cb601 | 611 | /* <fun> */ |
f56a39af | 612 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
613 | "Matthew, BEET driven development works!%c[%dm", |
614 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
615 | /* </fun> */ | |
fac6795d DG |
616 | } |
617 | ||
e065084a | 618 | /* |
d063d709 | 619 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 620 | * |
d063d709 | 621 | * Return lttcomm error code. |
e065084a DG |
622 | */ |
623 | static int send_unix_sock(int sock, void *buf, size_t len) | |
624 | { | |
625 | /* Check valid length */ | |
c617c0c6 | 626 | if (len == 0) { |
e065084a DG |
627 | return -1; |
628 | } | |
629 | ||
630 | return lttcomm_send_unix_sock(sock, buf, len); | |
631 | } | |
632 | ||
5461b305 | 633 | /* |
d063d709 | 634 | * Free memory of a command context structure. |
5461b305 | 635 | */ |
a2fb29a5 | 636 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 637 | { |
a2fb29a5 DG |
638 | DBG("Clean command context structure"); |
639 | if (*cmd_ctx) { | |
640 | if ((*cmd_ctx)->llm) { | |
641 | free((*cmd_ctx)->llm); | |
5461b305 | 642 | } |
a2fb29a5 DG |
643 | if ((*cmd_ctx)->lsm) { |
644 | free((*cmd_ctx)->lsm); | |
5461b305 | 645 | } |
a2fb29a5 DG |
646 | free(*cmd_ctx); |
647 | *cmd_ctx = NULL; | |
5461b305 DG |
648 | } |
649 | } | |
650 | ||
fac6795d | 651 | /* |
0fdd1e2c | 652 | * Notify UST applications using the shm mmap futex. |
fac6795d | 653 | */ |
0fdd1e2c | 654 | static int notify_ust_apps(int active) |
fac6795d | 655 | { |
0fdd1e2c | 656 | char *wait_shm_mmap; |
fac6795d | 657 | |
0fdd1e2c | 658 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 659 | |
0fdd1e2c DG |
660 | /* See shm.c for this call implying mmap, shm and futex calls */ |
661 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
662 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
663 | goto error; |
664 | } | |
665 | ||
0fdd1e2c DG |
666 | /* Wake waiting process */ |
667 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
668 | ||
669 | /* Apps notified successfully */ | |
670 | return 0; | |
fac6795d DG |
671 | |
672 | error: | |
0fdd1e2c | 673 | return -1; |
fac6795d DG |
674 | } |
675 | ||
e065084a | 676 | /* |
d063d709 DG |
677 | * Setup the outgoing data buffer for the response (llm) by allocating the |
678 | * right amount of memory and copying the original information from the lsm | |
679 | * structure. | |
ca95a216 | 680 | * |
d063d709 | 681 | * Return total size of the buffer pointed by buf. |
ca95a216 | 682 | */ |
5461b305 | 683 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 684 | { |
f3ed775e | 685 | int ret, buf_size; |
ca95a216 | 686 | |
f3ed775e | 687 | buf_size = size; |
5461b305 | 688 | |
ba7f0ae5 | 689 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 690 | if (cmd_ctx->llm == NULL) { |
76d7553f | 691 | PERROR("zmalloc"); |
5461b305 | 692 | ret = -ENOMEM; |
ca95a216 DG |
693 | goto error; |
694 | } | |
695 | ||
5461b305 DG |
696 | /* Copy common data */ |
697 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 698 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 699 | |
5461b305 DG |
700 | cmd_ctx->llm->data_size = size; |
701 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
702 | ||
ca95a216 DG |
703 | return buf_size; |
704 | ||
705 | error: | |
706 | return ret; | |
707 | } | |
708 | ||
7a485870 | 709 | /* |
5eb91c98 | 710 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 711 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 712 | */ |
5eb91c98 | 713 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 714 | { |
5eb91c98 | 715 | int ret; |
7a485870 DG |
716 | struct ltt_session *session; |
717 | struct ltt_kernel_channel *channel; | |
718 | ||
5eb91c98 | 719 | DBG("Updating kernel poll set"); |
7a485870 | 720 | |
54d01ffb | 721 | session_lock_list(); |
b5541356 | 722 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 723 | session_lock(session); |
7a485870 | 724 | if (session->kernel_session == NULL) { |
54d01ffb | 725 | session_unlock(session); |
7a485870 DG |
726 | continue; |
727 | } | |
7a485870 | 728 | |
54d01ffb DG |
729 | cds_list_for_each_entry(channel, |
730 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
731 | /* Add channel fd to the kernel poll set */ |
732 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
733 | if (ret < 0) { | |
54d01ffb | 734 | session_unlock(session); |
5eb91c98 DG |
735 | goto error; |
736 | } | |
737 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 738 | } |
54d01ffb | 739 | session_unlock(session); |
7a485870 | 740 | } |
54d01ffb | 741 | session_unlock_list(); |
7a485870 | 742 | |
5eb91c98 | 743 | return 0; |
7a485870 DG |
744 | |
745 | error: | |
54d01ffb | 746 | session_unlock_list(); |
7a485870 DG |
747 | return -1; |
748 | } | |
749 | ||
750 | /* | |
54d01ffb | 751 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 752 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 753 | * |
d063d709 | 754 | * Useful for CPU hotplug feature. |
7a485870 | 755 | */ |
2bdd86d4 | 756 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
757 | { |
758 | int ret = 0; | |
759 | struct ltt_session *session; | |
173af62f | 760 | struct ltt_kernel_session *ksess; |
7a485870 DG |
761 | struct ltt_kernel_channel *channel; |
762 | ||
763 | DBG("Updating kernel streams for channel fd %d", fd); | |
764 | ||
54d01ffb | 765 | session_lock_list(); |
b5541356 | 766 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 767 | session_lock(session); |
7a485870 | 768 | if (session->kernel_session == NULL) { |
54d01ffb | 769 | session_unlock(session); |
7a485870 DG |
770 | continue; |
771 | } | |
173af62f | 772 | ksess = session->kernel_session; |
d9800920 | 773 | |
173af62f | 774 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
775 | if (channel->fd == fd) { |
776 | DBG("Channel found, updating kernel streams"); | |
777 | ret = kernel_open_channel_stream(channel); | |
778 | if (ret < 0) { | |
b3c750d2 | 779 | goto error; |
7a485870 | 780 | } |
5c786ded JD |
781 | /* Update the stream global counter */ |
782 | ksess->stream_count_global += ret; | |
d9800920 | 783 | |
7a485870 | 784 | /* |
5eb91c98 DG |
785 | * Have we already sent fds to the consumer? If yes, it means |
786 | * that tracing is started so it is safe to send our updated | |
787 | * stream fds. | |
7a485870 | 788 | */ |
173af62f DG |
789 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
790 | struct lttng_ht_iter iter; | |
791 | struct consumer_socket *socket; | |
792 | ||
e7fe706f | 793 | rcu_read_lock(); |
173af62f DG |
794 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
795 | &iter.iter, socket, node.node) { | |
173af62f | 796 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 797 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
798 | channel, ksess, |
799 | session->output_traces ? 1 : 0); | |
173af62f DG |
800 | pthread_mutex_unlock(socket->lock); |
801 | if (ret < 0) { | |
e7fe706f | 802 | rcu_read_unlock(); |
173af62f DG |
803 | goto error; |
804 | } | |
7a485870 | 805 | } |
e7fe706f | 806 | rcu_read_unlock(); |
7a485870 | 807 | } |
b3c750d2 | 808 | goto error; |
7a485870 DG |
809 | } |
810 | } | |
54d01ffb | 811 | session_unlock(session); |
7a485870 | 812 | } |
54d01ffb | 813 | session_unlock_list(); |
b3c750d2 | 814 | return ret; |
7a485870 | 815 | |
b3c750d2 | 816 | error: |
54d01ffb DG |
817 | session_unlock(session); |
818 | session_unlock_list(); | |
7a485870 DG |
819 | return ret; |
820 | } | |
821 | ||
487cf67c | 822 | /* |
ffe60014 DG |
823 | * For each tracing session, update newly registered apps. The session list |
824 | * lock MUST be acquired before calling this. | |
487cf67c DG |
825 | */ |
826 | static void update_ust_app(int app_sock) | |
827 | { | |
828 | struct ltt_session *sess, *stmp; | |
829 | ||
fdadac08 DG |
830 | /* Consumer is in an ERROR state. Stop any application update. */ |
831 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
832 | /* Stop the update process since the consumer is dead. */ | |
833 | return; | |
834 | } | |
835 | ||
487cf67c DG |
836 | /* For all tracing session(s) */ |
837 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 838 | session_lock(sess); |
421cb601 DG |
839 | if (sess->ust_session) { |
840 | ust_app_global_update(sess->ust_session, app_sock); | |
841 | } | |
4ee14516 | 842 | session_unlock(sess); |
487cf67c DG |
843 | } |
844 | } | |
845 | ||
7a485870 | 846 | /* |
d063d709 | 847 | * This thread manage event coming from the kernel. |
7a485870 | 848 | * |
d063d709 DG |
849 | * Features supported in this thread: |
850 | * -) CPU Hotplug | |
7a485870 DG |
851 | */ |
852 | static void *thread_manage_kernel(void *data) | |
853 | { | |
139ac872 | 854 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 855 | uint32_t revents, nb_fd; |
7a485870 | 856 | char tmp; |
5eb91c98 | 857 | struct lttng_poll_event events; |
7a485870 | 858 | |
6993eeb3 | 859 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 860 | |
6c71277b | 861 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 862 | |
d5d63bf1 DG |
863 | /* |
864 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 865 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 866 | */ |
6d737ce4 | 867 | lttng_poll_init(&events); |
d5d63bf1 | 868 | |
6993eeb3 CB |
869 | if (testpoint(thread_manage_kernel)) { |
870 | goto error_testpoint; | |
871 | } | |
8ac94142 | 872 | |
840cb59c | 873 | health_code_update(); |
44a5e5eb | 874 | |
6993eeb3 | 875 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 876 | goto error_testpoint; |
6993eeb3 CB |
877 | } |
878 | ||
7a485870 | 879 | while (1) { |
840cb59c | 880 | health_code_update(); |
44a5e5eb | 881 | |
7a485870 | 882 | if (update_poll_flag == 1) { |
d21b0d71 DG |
883 | /* Clean events object. We are about to populate it again. */ |
884 | lttng_poll_clean(&events); | |
885 | ||
d0b96690 | 886 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
887 | if (ret < 0) { |
888 | goto error_poll_create; | |
889 | } | |
890 | ||
891 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
892 | if (ret < 0) { | |
893 | goto error; | |
894 | } | |
5f822d0a | 895 | |
d21b0d71 | 896 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
897 | ret = update_kernel_poll(&events); |
898 | if (ret < 0) { | |
7a485870 DG |
899 | goto error; |
900 | } | |
901 | update_poll_flag = 0; | |
902 | } | |
903 | ||
d21b0d71 | 904 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
905 | |
906 | /* Poll infinite value of time */ | |
88f2b785 | 907 | restart: |
a78af745 | 908 | health_poll_entry(); |
5eb91c98 | 909 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 910 | health_poll_exit(); |
7a485870 | 911 | if (ret < 0) { |
88f2b785 MD |
912 | /* |
913 | * Restart interrupted system call. | |
914 | */ | |
915 | if (errno == EINTR) { | |
916 | goto restart; | |
917 | } | |
7a485870 DG |
918 | goto error; |
919 | } else if (ret == 0) { | |
920 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
921 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
922 | "This should not have happened! Continuing..."); | |
7a485870 DG |
923 | continue; |
924 | } | |
925 | ||
0d9c5d77 DG |
926 | nb_fd = ret; |
927 | ||
5eb91c98 DG |
928 | for (i = 0; i < nb_fd; i++) { |
929 | /* Fetch once the poll data */ | |
930 | revents = LTTNG_POLL_GETEV(&events, i); | |
931 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 932 | |
840cb59c | 933 | health_code_update(); |
44a5e5eb | 934 | |
5eb91c98 | 935 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 936 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 937 | if (ret) { |
139ac872 MD |
938 | err = 0; |
939 | goto exit; | |
5eb91c98 | 940 | } |
7a485870 | 941 | |
5eb91c98 DG |
942 | /* Check for data on kernel pipe */ |
943 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
6cd525e8 MD |
944 | (void) lttng_read(kernel_poll_pipe[0], |
945 | &tmp, 1); | |
f921c78f DG |
946 | /* |
947 | * Ret value is useless here, if this pipe gets any actions an | |
948 | * update is required anyway. | |
949 | */ | |
5eb91c98 DG |
950 | update_poll_flag = 1; |
951 | continue; | |
952 | } else { | |
953 | /* | |
954 | * New CPU detected by the kernel. Adding kernel stream to | |
955 | * kernel session and updating the kernel consumer | |
956 | */ | |
957 | if (revents & LPOLLIN) { | |
2bdd86d4 | 958 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
959 | if (ret < 0) { |
960 | continue; | |
961 | } | |
962 | break; | |
963 | /* | |
964 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
965 | * and unregister kernel stream at this point. | |
966 | */ | |
7a485870 | 967 | } |
7a485870 DG |
968 | } |
969 | } | |
970 | } | |
971 | ||
139ac872 | 972 | exit: |
7a485870 | 973 | error: |
5eb91c98 | 974 | lttng_poll_clean(&events); |
76d7553f | 975 | error_poll_create: |
6993eeb3 | 976 | error_testpoint: |
6620da75 DG |
977 | utils_close_pipe(kernel_poll_pipe); |
978 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 979 | if (err) { |
840cb59c | 980 | health_error(); |
139ac872 | 981 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
982 | WARN("Kernel thread died unexpectedly. " |
983 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 984 | } |
8782cc74 | 985 | health_unregister(health_sessiond); |
76d7553f | 986 | DBG("Kernel thread dying"); |
7a485870 DG |
987 | return NULL; |
988 | } | |
989 | ||
a23ec3a7 DG |
990 | /* |
991 | * Signal pthread condition of the consumer data that the thread. | |
992 | */ | |
993 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
994 | { | |
995 | pthread_mutex_lock(&data->cond_mutex); | |
996 | ||
997 | /* | |
998 | * The state is set before signaling. It can be any value, it's the waiter | |
999 | * job to correctly interpret this condition variable associated to the | |
1000 | * consumer pthread_cond. | |
1001 | * | |
1002 | * A value of 0 means that the corresponding thread of the consumer data | |
1003 | * was not started. 1 indicates that the thread has started and is ready | |
1004 | * for action. A negative value means that there was an error during the | |
1005 | * thread bootstrap. | |
1006 | */ | |
1007 | data->consumer_thread_is_ready = state; | |
1008 | (void) pthread_cond_signal(&data->cond); | |
1009 | ||
1010 | pthread_mutex_unlock(&data->cond_mutex); | |
1011 | } | |
1012 | ||
1d4b027a | 1013 | /* |
3bd1e081 | 1014 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1015 | */ |
3bd1e081 | 1016 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1017 | { |
139ac872 | 1018 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 1019 | uint32_t revents, nb_fd; |
1d4b027a | 1020 | enum lttcomm_return_code code; |
5eb91c98 | 1021 | struct lttng_poll_event events; |
3bd1e081 | 1022 | struct consumer_data *consumer_data = data; |
1d4b027a | 1023 | |
3bd1e081 | 1024 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1025 | |
6c71277b | 1026 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1027 | |
855060f8 | 1028 | health_code_update(); |
9449cc75 | 1029 | |
5eb91c98 | 1030 | /* |
331744e3 JD |
1031 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1032 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1033 | */ |
331744e3 | 1034 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1035 | if (ret < 0) { |
76d7553f | 1036 | goto error_poll; |
5eb91c98 | 1037 | } |
273ea72c | 1038 | |
edb8b045 DG |
1039 | /* |
1040 | * The error socket here is already in a listening state which was done | |
1041 | * just before spawning this thread to avoid a race between the consumer | |
1042 | * daemon exec trying to connect and the listen() call. | |
1043 | */ | |
3bd1e081 | 1044 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1045 | if (ret < 0) { |
1046 | goto error; | |
1047 | } | |
1048 | ||
840cb59c | 1049 | health_code_update(); |
44a5e5eb | 1050 | |
331744e3 | 1051 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1052 | restart: |
a78af745 | 1053 | health_poll_entry(); |
8ac94142 | 1054 | |
6993eeb3 CB |
1055 | if (testpoint(thread_manage_consumer)) { |
1056 | goto error; | |
1057 | } | |
8ac94142 | 1058 | |
5eb91c98 | 1059 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1060 | health_poll_exit(); |
273ea72c | 1061 | if (ret < 0) { |
88f2b785 MD |
1062 | /* |
1063 | * Restart interrupted system call. | |
1064 | */ | |
1065 | if (errno == EINTR) { | |
1066 | goto restart; | |
1067 | } | |
273ea72c DG |
1068 | goto error; |
1069 | } | |
1070 | ||
0d9c5d77 DG |
1071 | nb_fd = ret; |
1072 | ||
5eb91c98 DG |
1073 | for (i = 0; i < nb_fd; i++) { |
1074 | /* Fetch once the poll data */ | |
1075 | revents = LTTNG_POLL_GETEV(&events, i); | |
1076 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1077 | ||
840cb59c | 1078 | health_code_update(); |
44a5e5eb | 1079 | |
5eb91c98 | 1080 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1081 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1082 | if (ret) { |
139ac872 MD |
1083 | err = 0; |
1084 | goto exit; | |
5eb91c98 DG |
1085 | } |
1086 | ||
1087 | /* Event on the registration socket */ | |
3bd1e081 | 1088 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1089 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1090 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1091 | goto error; |
1092 | } | |
1093 | } | |
273ea72c DG |
1094 | } |
1095 | ||
3bd1e081 | 1096 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1097 | if (sock < 0) { |
1098 | goto error; | |
1099 | } | |
1100 | ||
b662582b DG |
1101 | /* |
1102 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1103 | * show must go on. | |
1104 | */ | |
1105 | (void) utils_set_fd_cloexec(sock); | |
1106 | ||
840cb59c | 1107 | health_code_update(); |
44a5e5eb | 1108 | |
3bd1e081 | 1109 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1110 | |
712ea556 | 1111 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1112 | ret = lttcomm_recv_unix_sock(sock, &code, |
1113 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1114 | if (ret <= 0) { |
1115 | goto error; | |
1116 | } | |
1117 | ||
840cb59c | 1118 | health_code_update(); |
44a5e5eb | 1119 | |
f73fabfd | 1120 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1121 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1122 | consumer_data->cmd_sock = |
1123 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1124 | consumer_data->metadata_fd = |
331744e3 | 1125 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1126 | if (consumer_data->cmd_sock < 0 |
1127 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1128 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1129 | /* On error, signal condition and quit. */ |
1130 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1131 | goto error; |
1132 | } | |
9363801e | 1133 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1134 | /* Create metadata socket lock. */ |
1135 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1136 | if (consumer_data->metadata_sock.lock == NULL) { | |
1137 | PERROR("zmalloc pthread mutex"); | |
1138 | ret = -1; | |
1139 | goto error; | |
1140 | } | |
1141 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1142 | ||
a23ec3a7 | 1143 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1144 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1145 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1146 | consumer_data->metadata_fd); |
1d4b027a | 1147 | } else { |
3bd1e081 | 1148 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1149 | lttcomm_get_readable_code(-code)); |
1150 | goto error; | |
1151 | } | |
1152 | ||
331744e3 | 1153 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1154 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1155 | if (ret < 0) { |
72079cae DG |
1156 | goto error; |
1157 | } | |
1158 | ||
331744e3 | 1159 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1160 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1161 | if (ret < 0) { | |
72079cae | 1162 | goto error; |
5eb91c98 DG |
1163 | } |
1164 | ||
331744e3 | 1165 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1166 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1167 | LPOLLIN | LPOLLRDHUP); |
1168 | if (ret < 0) { | |
1169 | goto error; | |
1170 | } | |
1171 | ||
840cb59c | 1172 | health_code_update(); |
44a5e5eb | 1173 | |
331744e3 | 1174 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1175 | restart_poll: |
331744e3 JD |
1176 | while (1) { |
1177 | health_poll_entry(); | |
1178 | ret = lttng_poll_wait(&events, -1); | |
1179 | health_poll_exit(); | |
1180 | if (ret < 0) { | |
1181 | /* | |
1182 | * Restart interrupted system call. | |
1183 | */ | |
1184 | if (errno == EINTR) { | |
1185 | goto restart_poll; | |
1186 | } | |
1187 | goto error; | |
88f2b785 | 1188 | } |
72079cae | 1189 | |
331744e3 | 1190 | nb_fd = ret; |
0d9c5d77 | 1191 | |
331744e3 JD |
1192 | for (i = 0; i < nb_fd; i++) { |
1193 | /* Fetch once the poll data */ | |
1194 | revents = LTTNG_POLL_GETEV(&events, i); | |
1195 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1196 | |
331744e3 | 1197 | health_code_update(); |
44a5e5eb | 1198 | |
331744e3 JD |
1199 | /* Thread quit pipe has been closed. Killing thread. */ |
1200 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1201 | if (ret) { | |
1202 | err = 0; | |
1203 | goto exit; | |
1204 | } | |
5eb91c98 | 1205 | |
331744e3 JD |
1206 | if (pollfd == sock) { |
1207 | /* Event on the consumerd socket */ | |
1208 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1209 | ERR("consumer err socket second poll error"); | |
1210 | goto error; | |
1211 | } | |
1212 | health_code_update(); | |
1213 | /* Wait for any kconsumerd error */ | |
1214 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1215 | sizeof(enum lttcomm_return_code)); | |
1216 | if (ret <= 0) { | |
1217 | ERR("consumer closed the command socket"); | |
1218 | goto error; | |
1219 | } | |
1220 | ||
1221 | ERR("consumer return code : %s", | |
1222 | lttcomm_get_readable_code(-code)); | |
1223 | ||
1224 | goto exit; | |
4ce514c4 | 1225 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1226 | /* UST metadata requests */ |
1227 | ret = ust_consumer_metadata_request( | |
1228 | &consumer_data->metadata_sock); | |
1229 | if (ret < 0) { | |
1230 | ERR("Handling metadata request"); | |
1231 | goto error; | |
1232 | } | |
1233 | break; | |
1234 | } else { | |
1235 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1236 | goto error; |
1237 | } | |
1238 | } | |
331744e3 | 1239 | health_code_update(); |
5eb91c98 DG |
1240 | } |
1241 | ||
139ac872 | 1242 | exit: |
1d4b027a | 1243 | error: |
fdadac08 DG |
1244 | /* |
1245 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1246 | * thread might be using them so get exclusive access which will abort all |
1247 | * other consumer command by other threads. | |
fdadac08 DG |
1248 | */ |
1249 | pthread_mutex_lock(&consumer_data->lock); | |
1250 | ||
5c827ce0 DG |
1251 | /* Immediately set the consumerd state to stopped */ |
1252 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1253 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1254 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1255 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1256 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1257 | } else { | |
1258 | /* Code flow error... */ | |
1259 | assert(0); | |
1260 | } | |
1261 | ||
76d7553f MD |
1262 | if (consumer_data->err_sock >= 0) { |
1263 | ret = close(consumer_data->err_sock); | |
1264 | if (ret) { | |
1265 | PERROR("close"); | |
1266 | } | |
a76cbd9f | 1267 | consumer_data->err_sock = -1; |
76d7553f MD |
1268 | } |
1269 | if (consumer_data->cmd_sock >= 0) { | |
1270 | ret = close(consumer_data->cmd_sock); | |
1271 | if (ret) { | |
1272 | PERROR("close"); | |
1273 | } | |
a76cbd9f | 1274 | consumer_data->cmd_sock = -1; |
76d7553f | 1275 | } |
9363801e DG |
1276 | if (*consumer_data->metadata_sock.fd_ptr >= 0) { |
1277 | ret = close(*consumer_data->metadata_sock.fd_ptr); | |
331744e3 JD |
1278 | if (ret) { |
1279 | PERROR("close"); | |
1280 | } | |
1281 | } | |
331744e3 | 1282 | |
76d7553f MD |
1283 | if (sock >= 0) { |
1284 | ret = close(sock); | |
1285 | if (ret) { | |
1286 | PERROR("close"); | |
1287 | } | |
1288 | } | |
273ea72c | 1289 | |
3bd1e081 MD |
1290 | unlink(consumer_data->err_unix_sock_path); |
1291 | unlink(consumer_data->cmd_unix_sock_path); | |
1292 | consumer_data->pid = 0; | |
fdadac08 | 1293 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1294 | |
fdadac08 DG |
1295 | /* Cleanup metadata socket mutex. */ |
1296 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1297 | free(consumer_data->metadata_sock.lock); | |
1d4b027a | 1298 | |
5eb91c98 | 1299 | lttng_poll_clean(&events); |
76d7553f | 1300 | error_poll: |
139ac872 | 1301 | if (err) { |
840cb59c | 1302 | health_error(); |
139ac872 MD |
1303 | ERR("Health error occurred in %s", __func__); |
1304 | } | |
8782cc74 | 1305 | health_unregister(health_sessiond); |
76d7553f | 1306 | DBG("consumer thread cleanup completed"); |
0177d773 | 1307 | |
5eb91c98 | 1308 | return NULL; |
099e26bd DG |
1309 | } |
1310 | ||
099e26bd DG |
1311 | /* |
1312 | * This thread manage application communication. | |
1d4b027a DG |
1313 | */ |
1314 | static void *thread_manage_apps(void *data) | |
099e26bd | 1315 | { |
139ac872 | 1316 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1317 | ssize_t size_ret; |
5eb91c98 | 1318 | uint32_t revents, nb_fd; |
5eb91c98 | 1319 | struct lttng_poll_event events; |
099e26bd DG |
1320 | |
1321 | DBG("[thread] Manage application started"); | |
1322 | ||
f6a9efaa DG |
1323 | rcu_register_thread(); |
1324 | rcu_thread_online(); | |
1325 | ||
6c71277b | 1326 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1327 | |
6993eeb3 CB |
1328 | if (testpoint(thread_manage_apps)) { |
1329 | goto error_testpoint; | |
1330 | } | |
1331 | ||
840cb59c | 1332 | health_code_update(); |
44a5e5eb | 1333 | |
d0b96690 | 1334 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1335 | if (ret < 0) { |
76d7553f | 1336 | goto error_poll_create; |
5eb91c98 | 1337 | } |
099e26bd | 1338 | |
5eb91c98 DG |
1339 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1340 | if (ret < 0) { | |
1341 | goto error; | |
1342 | } | |
099e26bd | 1343 | |
6993eeb3 CB |
1344 | if (testpoint(thread_manage_apps_before_loop)) { |
1345 | goto error; | |
1346 | } | |
8ac94142 | 1347 | |
840cb59c | 1348 | health_code_update(); |
44a5e5eb | 1349 | |
5eb91c98 | 1350 | while (1) { |
d21b0d71 | 1351 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1352 | |
1353 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1354 | restart: |
a78af745 | 1355 | health_poll_entry(); |
5eb91c98 | 1356 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1357 | health_poll_exit(); |
099e26bd | 1358 | if (ret < 0) { |
88f2b785 MD |
1359 | /* |
1360 | * Restart interrupted system call. | |
1361 | */ | |
1362 | if (errno == EINTR) { | |
1363 | goto restart; | |
1364 | } | |
099e26bd DG |
1365 | goto error; |
1366 | } | |
1367 | ||
0d9c5d77 DG |
1368 | nb_fd = ret; |
1369 | ||
5eb91c98 DG |
1370 | for (i = 0; i < nb_fd; i++) { |
1371 | /* Fetch once the poll data */ | |
1372 | revents = LTTNG_POLL_GETEV(&events, i); | |
1373 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1374 | ||
840cb59c | 1375 | health_code_update(); |
44a5e5eb | 1376 | |
5eb91c98 | 1377 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1378 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1379 | if (ret) { |
139ac872 MD |
1380 | err = 0; |
1381 | goto exit; | |
5eb91c98 | 1382 | } |
099e26bd | 1383 | |
5eb91c98 DG |
1384 | /* Inspect the apps cmd pipe */ |
1385 | if (pollfd == apps_cmd_pipe[0]) { | |
1386 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1387 | ERR("Apps command pipe error"); | |
0177d773 | 1388 | goto error; |
5eb91c98 | 1389 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1390 | int sock; |
1391 | ||
5eb91c98 | 1392 | /* Empty pipe */ |
6cd525e8 MD |
1393 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1394 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1395 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1396 | goto error; |
1397 | } | |
099e26bd | 1398 | |
840cb59c | 1399 | health_code_update(); |
44a5e5eb | 1400 | |
ffe60014 | 1401 | /* |
d0b96690 DG |
1402 | * We only monitor the error events of the socket. This |
1403 | * thread does not handle any incoming data from UST | |
1404 | * (POLLIN). | |
ffe60014 | 1405 | */ |
d0b96690 DG |
1406 | ret = lttng_poll_add(&events, sock, |
1407 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1408 | if (ret < 0) { | |
5eb91c98 | 1409 | goto error; |
e0c7ec2b | 1410 | } |
acc7b41b | 1411 | |
d0b96690 | 1412 | DBG("Apps with sock %d added to poll set", sock); |
0177d773 | 1413 | } |
5eb91c98 DG |
1414 | } else { |
1415 | /* | |
54d01ffb DG |
1416 | * At this point, we know that a registered application made |
1417 | * the event at poll_wait. | |
5eb91c98 DG |
1418 | */ |
1419 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1420 | /* Removing from the poll set */ | |
1421 | ret = lttng_poll_del(&events, pollfd); | |
1422 | if (ret < 0) { | |
1423 | goto error; | |
1424 | } | |
099e26bd | 1425 | |
b9d9b220 | 1426 | /* Socket closed on remote end. */ |
56fff090 | 1427 | ust_app_unregister(pollfd); |
5eb91c98 | 1428 | } |
099e26bd | 1429 | } |
44a5e5eb | 1430 | |
840cb59c | 1431 | health_code_update(); |
099e26bd | 1432 | } |
099e26bd DG |
1433 | } |
1434 | ||
139ac872 | 1435 | exit: |
099e26bd | 1436 | error: |
5eb91c98 | 1437 | lttng_poll_clean(&events); |
76d7553f | 1438 | error_poll_create: |
6993eeb3 | 1439 | error_testpoint: |
6620da75 DG |
1440 | utils_close_pipe(apps_cmd_pipe); |
1441 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1442 | ||
1443 | /* | |
1444 | * We don't clean the UST app hash table here since already registered | |
1445 | * applications can still be controlled so let them be until the session | |
1446 | * daemon dies or the applications stop. | |
1447 | */ | |
1448 | ||
139ac872 | 1449 | if (err) { |
840cb59c | 1450 | health_error(); |
139ac872 MD |
1451 | ERR("Health error occurred in %s", __func__); |
1452 | } | |
8782cc74 | 1453 | health_unregister(health_sessiond); |
76d7553f | 1454 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1455 | rcu_thread_offline(); |
1456 | rcu_unregister_thread(); | |
099e26bd DG |
1457 | return NULL; |
1458 | } | |
1459 | ||
d0b96690 | 1460 | /* |
d88aee68 DG |
1461 | * Send a socket to a thread This is called from the dispatch UST registration |
1462 | * thread once all sockets are set for the application. | |
d0b96690 | 1463 | * |
b85dc84c DG |
1464 | * The sock value can be invalid, we don't really care, the thread will handle |
1465 | * it and make the necessary cleanup if so. | |
1466 | * | |
d0b96690 DG |
1467 | * On success, return 0 else a negative value being the errno message of the |
1468 | * write(). | |
1469 | */ | |
d88aee68 | 1470 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1471 | { |
6cd525e8 | 1472 | ssize_t ret; |
d0b96690 | 1473 | |
b85dc84c DG |
1474 | /* |
1475 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1476 | * before calling this function being a shutdown state of the thread. | |
1477 | */ | |
1478 | if (fd < 0) { | |
1479 | ret = -EBADF; | |
1480 | goto error; | |
1481 | } | |
d0b96690 | 1482 | |
6cd525e8 MD |
1483 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1484 | if (ret < sizeof(sock)) { | |
d88aee68 | 1485 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1486 | if (ret < 0) { |
1487 | ret = -errno; | |
1488 | } | |
1489 | goto error; | |
1490 | } | |
1491 | ||
1492 | /* All good. Don't send back the write positive ret value. */ | |
1493 | ret = 0; | |
1494 | error: | |
6cd525e8 | 1495 | return (int) ret; |
d0b96690 DG |
1496 | } |
1497 | ||
f45e313d DG |
1498 | /* |
1499 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1500 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1501 | * notify socket is never received. | |
1502 | */ | |
1503 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1504 | { | |
1505 | int ret, nb_fd = 0, i; | |
1506 | unsigned int fd_added = 0; | |
1507 | struct lttng_poll_event events; | |
1508 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1509 | ||
1510 | assert(wait_queue); | |
1511 | ||
1512 | lttng_poll_init(&events); | |
1513 | ||
1514 | /* Just skip everything for an empty queue. */ | |
1515 | if (!wait_queue->count) { | |
1516 | goto end; | |
1517 | } | |
1518 | ||
1519 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1520 | if (ret < 0) { | |
1521 | goto error_create; | |
1522 | } | |
1523 | ||
1524 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1525 | &wait_queue->head, head) { | |
1526 | assert(wait_node->app); | |
1527 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1528 | LPOLLHUP | LPOLLERR); | |
1529 | if (ret < 0) { | |
1530 | goto error; | |
1531 | } | |
1532 | ||
1533 | fd_added = 1; | |
1534 | } | |
1535 | ||
1536 | if (!fd_added) { | |
1537 | goto end; | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * Poll but don't block so we can quickly identify the faulty events and | |
1542 | * clean them afterwards from the wait queue. | |
1543 | */ | |
1544 | ret = lttng_poll_wait(&events, 0); | |
1545 | if (ret < 0) { | |
1546 | goto error; | |
1547 | } | |
1548 | nb_fd = ret; | |
1549 | ||
1550 | for (i = 0; i < nb_fd; i++) { | |
1551 | /* Get faulty FD. */ | |
1552 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1553 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1554 | ||
1555 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1556 | &wait_queue->head, head) { | |
1557 | if (pollfd == wait_node->app->sock && | |
1558 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1559 | cds_list_del(&wait_node->head); | |
1560 | wait_queue->count--; | |
1561 | ust_app_destroy(wait_node->app); | |
1562 | free(wait_node); | |
1563 | break; | |
1564 | } | |
1565 | } | |
1566 | } | |
1567 | ||
1568 | if (nb_fd > 0) { | |
1569 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1570 | } | |
1571 | ||
1572 | end: | |
1573 | lttng_poll_clean(&events); | |
1574 | return; | |
1575 | ||
1576 | error: | |
1577 | lttng_poll_clean(&events); | |
1578 | error_create: | |
1579 | ERR("Unable to sanitize wait queue"); | |
1580 | return; | |
1581 | } | |
1582 | ||
099e26bd DG |
1583 | /* |
1584 | * Dispatch request from the registration threads to the application | |
1585 | * communication thread. | |
1586 | */ | |
1587 | static void *thread_dispatch_ust_registration(void *data) | |
1588 | { | |
12e2b881 | 1589 | int ret, err = -1; |
099e26bd DG |
1590 | struct cds_wfq_node *node; |
1591 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1592 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1593 | struct ust_reg_wait_queue wait_queue = { | |
1594 | .count = 0, | |
1595 | }; | |
d0b96690 | 1596 | |
6c71277b | 1597 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 MD |
1598 | |
1599 | health_code_update(); | |
1600 | ||
f45e313d | 1601 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1602 | |
1603 | DBG("[thread] Dispatch UST command started"); | |
1604 | ||
26c9d55e | 1605 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1606 | health_code_update(); |
1607 | ||
099e26bd DG |
1608 | /* Atomically prepare the queue futex */ |
1609 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1610 | ||
1611 | do { | |
d0b96690 | 1612 | struct ust_app *app = NULL; |
7972aab2 | 1613 | ust_cmd = NULL; |
d0b96690 | 1614 | |
f45e313d DG |
1615 | /* |
1616 | * Make sure we don't have node(s) that have hung up before receiving | |
1617 | * the notify socket. This is to clean the list in order to avoid | |
1618 | * memory leaks from notify socket that are never seen. | |
1619 | */ | |
1620 | sanitize_wait_queue(&wait_queue); | |
1621 | ||
12e2b881 | 1622 | health_code_update(); |
099e26bd DG |
1623 | /* Dequeue command for registration */ |
1624 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1625 | if (node == NULL) { | |
00a17c97 | 1626 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1627 | /* Continue thread execution */ |
1628 | break; | |
1629 | } | |
1630 | ||
1631 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1632 | ||
2f50c8a3 DG |
1633 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1634 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1635 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1636 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1637 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1638 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1639 | |
1640 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1641 | wait_node = zmalloc(sizeof(*wait_node)); | |
1642 | if (!wait_node) { | |
1643 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1644 | ret = close(ust_cmd->sock); |
1645 | if (ret < 0) { | |
1646 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1647 | } | |
51dec90d | 1648 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1649 | free(ust_cmd); |
d0b96690 DG |
1650 | goto error; |
1651 | } | |
1652 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1653 | ||
1654 | /* Create application object if socket is CMD. */ | |
1655 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1656 | ust_cmd->sock); | |
1657 | if (!wait_node->app) { | |
1658 | ret = close(ust_cmd->sock); | |
1659 | if (ret < 0) { | |
1660 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1661 | } |
51dec90d | 1662 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1663 | free(wait_node); |
7972aab2 | 1664 | free(ust_cmd); |
d0b96690 DG |
1665 | continue; |
1666 | } | |
1667 | /* | |
1668 | * Add application to the wait queue so we can set the notify | |
1669 | * socket before putting this object in the global ht. | |
1670 | */ | |
f45e313d DG |
1671 | cds_list_add(&wait_node->head, &wait_queue.head); |
1672 | wait_queue.count++; | |
d0b96690 | 1673 | |
7972aab2 | 1674 | free(ust_cmd); |
d0b96690 DG |
1675 | /* |
1676 | * We have to continue here since we don't have the notify | |
1677 | * socket and the application MUST be added to the hash table | |
1678 | * only at that moment. | |
1679 | */ | |
1680 | continue; | |
1681 | } else { | |
1682 | /* | |
1683 | * Look for the application in the local wait queue and set the | |
1684 | * notify socket if found. | |
1685 | */ | |
d88aee68 | 1686 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1687 | &wait_queue.head, head) { |
12e2b881 | 1688 | health_code_update(); |
d0b96690 DG |
1689 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1690 | wait_node->app->notify_sock = ust_cmd->sock; | |
1691 | cds_list_del(&wait_node->head); | |
f45e313d | 1692 | wait_queue.count--; |
d0b96690 DG |
1693 | app = wait_node->app; |
1694 | free(wait_node); | |
1695 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1696 | break; | |
1697 | } | |
1698 | } | |
020d7f60 DG |
1699 | |
1700 | /* | |
1701 | * With no application at this stage the received socket is | |
1702 | * basically useless so close it before we free the cmd data | |
1703 | * structure for good. | |
1704 | */ | |
1705 | if (!app) { | |
1706 | ret = close(ust_cmd->sock); | |
1707 | if (ret < 0) { | |
1708 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1709 | } | |
51dec90d | 1710 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1711 | } |
7972aab2 | 1712 | free(ust_cmd); |
d0b96690 DG |
1713 | } |
1714 | ||
1715 | if (app) { | |
d0b96690 DG |
1716 | /* |
1717 | * @session_lock_list | |
1718 | * | |
1719 | * Lock the global session list so from the register up to the | |
1720 | * registration done message, no thread can see the application | |
1721 | * and change its state. | |
1722 | */ | |
1723 | session_lock_list(); | |
1724 | rcu_read_lock(); | |
d88aee68 | 1725 | |
d0b96690 DG |
1726 | /* |
1727 | * Add application to the global hash table. This needs to be | |
1728 | * done before the update to the UST registry can locate the | |
1729 | * application. | |
1730 | */ | |
1731 | ust_app_add(app); | |
d88aee68 DG |
1732 | |
1733 | /* Set app version. This call will print an error if needed. */ | |
1734 | (void) ust_app_version(app); | |
1735 | ||
1736 | /* Send notify socket through the notify pipe. */ | |
1737 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1738 | app->notify_sock); | |
1739 | if (ret < 0) { | |
1740 | rcu_read_unlock(); | |
1741 | session_unlock_list(); | |
b85dc84c DG |
1742 | /* |
1743 | * No notify thread, stop the UST tracing. However, this is | |
1744 | * not an internal error of the this thread thus setting | |
1745 | * the health error code to a normal exit. | |
1746 | */ | |
1747 | err = 0; | |
d88aee68 | 1748 | goto error; |
6620da75 | 1749 | } |
d88aee68 | 1750 | |
d0b96690 DG |
1751 | /* |
1752 | * Update newly registered application with the tracing | |
1753 | * registry info already enabled information. | |
1754 | */ | |
1755 | update_ust_app(app->sock); | |
d88aee68 DG |
1756 | |
1757 | /* | |
1758 | * Don't care about return value. Let the manage apps threads | |
1759 | * handle app unregistration upon socket close. | |
1760 | */ | |
1761 | (void) ust_app_register_done(app->sock); | |
1762 | ||
1763 | /* | |
1764 | * Even if the application socket has been closed, send the app | |
1765 | * to the thread and unregistration will take place at that | |
1766 | * place. | |
1767 | */ | |
1768 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1769 | if (ret < 0) { |
d88aee68 DG |
1770 | rcu_read_unlock(); |
1771 | session_unlock_list(); | |
b85dc84c DG |
1772 | /* |
1773 | * No apps. thread, stop the UST tracing. However, this is | |
1774 | * not an internal error of the this thread thus setting | |
1775 | * the health error code to a normal exit. | |
1776 | */ | |
1777 | err = 0; | |
d88aee68 | 1778 | goto error; |
d0b96690 | 1779 | } |
d88aee68 | 1780 | |
d0b96690 DG |
1781 | rcu_read_unlock(); |
1782 | session_unlock_list(); | |
099e26bd | 1783 | } |
099e26bd DG |
1784 | } while (node != NULL); |
1785 | ||
12e2b881 | 1786 | health_poll_entry(); |
099e26bd DG |
1787 | /* Futex wait on queue. Blocking call on futex() */ |
1788 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1789 | health_poll_exit(); |
099e26bd | 1790 | } |
12e2b881 MD |
1791 | /* Normal exit, no error */ |
1792 | err = 0; | |
099e26bd DG |
1793 | |
1794 | error: | |
d88aee68 DG |
1795 | /* Clean up wait queue. */ |
1796 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1797 | &wait_queue.head, head) { |
d88aee68 | 1798 | cds_list_del(&wait_node->head); |
f45e313d | 1799 | wait_queue.count--; |
d88aee68 DG |
1800 | free(wait_node); |
1801 | } | |
1802 | ||
099e26bd | 1803 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1804 | if (err) { |
1805 | health_error(); | |
1806 | ERR("Health error occurred in %s", __func__); | |
1807 | } | |
8782cc74 | 1808 | health_unregister(health_sessiond); |
099e26bd DG |
1809 | return NULL; |
1810 | } | |
1811 | ||
1812 | /* | |
1813 | * This thread manage application registration. | |
1814 | */ | |
1815 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1816 | { |
139ac872 | 1817 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1818 | uint32_t revents, nb_fd; |
1819 | struct lttng_poll_event events; | |
099e26bd DG |
1820 | /* |
1821 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1822 | * freed in the manage apps thread. | |
1823 | */ | |
1824 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1825 | |
099e26bd | 1826 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1827 | |
6c71277b | 1828 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1829 | |
6993eeb3 CB |
1830 | if (testpoint(thread_registration_apps)) { |
1831 | goto error_testpoint; | |
1832 | } | |
8ac94142 | 1833 | |
1d4b027a DG |
1834 | ret = lttcomm_listen_unix_sock(apps_sock); |
1835 | if (ret < 0) { | |
76d7553f | 1836 | goto error_listen; |
1d4b027a DG |
1837 | } |
1838 | ||
5eb91c98 DG |
1839 | /* |
1840 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1841 | * more will be added to this poll set. | |
1842 | */ | |
d0b96690 | 1843 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1844 | if (ret < 0) { |
76d7553f | 1845 | goto error_create_poll; |
5eb91c98 | 1846 | } |
273ea72c | 1847 | |
5eb91c98 DG |
1848 | /* Add the application registration socket */ |
1849 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1850 | if (ret < 0) { | |
76d7553f | 1851 | goto error_poll_add; |
5eb91c98 | 1852 | } |
273ea72c | 1853 | |
1d4b027a | 1854 | /* Notify all applications to register */ |
0fdd1e2c DG |
1855 | ret = notify_ust_apps(1); |
1856 | if (ret < 0) { | |
1857 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1858 | "Execution continues but there might be problem for already\n" |
1859 | "running applications that wishes to register."); | |
0fdd1e2c | 1860 | } |
1d4b027a DG |
1861 | |
1862 | while (1) { | |
1863 | DBG("Accepting application registration"); | |
273ea72c DG |
1864 | |
1865 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1866 | restart: |
a78af745 | 1867 | health_poll_entry(); |
5eb91c98 | 1868 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1869 | health_poll_exit(); |
273ea72c | 1870 | if (ret < 0) { |
88f2b785 MD |
1871 | /* |
1872 | * Restart interrupted system call. | |
1873 | */ | |
1874 | if (errno == EINTR) { | |
1875 | goto restart; | |
1876 | } | |
273ea72c DG |
1877 | goto error; |
1878 | } | |
1879 | ||
0d9c5d77 DG |
1880 | nb_fd = ret; |
1881 | ||
5eb91c98 | 1882 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1883 | health_code_update(); |
139ac872 | 1884 | |
5eb91c98 DG |
1885 | /* Fetch once the poll data */ |
1886 | revents = LTTNG_POLL_GETEV(&events, i); | |
1887 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1888 | |
5eb91c98 | 1889 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1890 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1891 | if (ret) { |
139ac872 MD |
1892 | err = 0; |
1893 | goto exit; | |
90014c57 | 1894 | } |
1d4b027a | 1895 | |
5eb91c98 DG |
1896 | /* Event on the registration socket */ |
1897 | if (pollfd == apps_sock) { | |
1898 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1899 | ERR("Register apps socket poll error"); | |
1900 | goto error; | |
1901 | } else if (revents & LPOLLIN) { | |
1902 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1903 | if (sock < 0) { | |
1904 | goto error; | |
1905 | } | |
099e26bd | 1906 | |
16c5c8fa DG |
1907 | /* |
1908 | * Set socket timeout for both receiving and ending. | |
1909 | * app_socket_timeout is in seconds, whereas | |
1910 | * lttcomm_setsockopt_rcv_timeout and | |
1911 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1912 | * parameter. | |
1913 | */ | |
1914 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1915 | app_socket_timeout * 1000); | |
1916 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1917 | app_socket_timeout * 1000); | |
1918 | ||
b662582b DG |
1919 | /* |
1920 | * Set the CLOEXEC flag. Return code is useless because | |
1921 | * either way, the show must go on. | |
1922 | */ | |
1923 | (void) utils_set_fd_cloexec(sock); | |
1924 | ||
5eb91c98 | 1925 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1926 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1927 | if (ust_cmd == NULL) { |
76d7553f | 1928 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1929 | goto error; |
1930 | } | |
1d4b027a | 1931 | |
5eb91c98 DG |
1932 | /* |
1933 | * Using message-based transmissions to ensure we don't | |
1934 | * have to deal with partially received messages. | |
1935 | */ | |
4063050c MD |
1936 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1937 | if (ret < 0) { | |
1938 | ERR("Exhausted file descriptors allowed for applications."); | |
1939 | free(ust_cmd); | |
1940 | ret = close(sock); | |
1941 | if (ret) { | |
1942 | PERROR("close"); | |
1943 | } | |
1944 | sock = -1; | |
1945 | continue; | |
1946 | } | |
d88aee68 | 1947 | |
840cb59c | 1948 | health_code_update(); |
d0b96690 DG |
1949 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1950 | if (ret < 0) { | |
5eb91c98 | 1951 | free(ust_cmd); |
d0b96690 | 1952 | /* Close socket of the application. */ |
76d7553f MD |
1953 | ret = close(sock); |
1954 | if (ret) { | |
1955 | PERROR("close"); | |
1956 | } | |
4063050c | 1957 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1958 | sock = -1; |
5eb91c98 DG |
1959 | continue; |
1960 | } | |
840cb59c | 1961 | health_code_update(); |
099e26bd | 1962 | |
5eb91c98 | 1963 | ust_cmd->sock = sock; |
34a2494f | 1964 | sock = -1; |
099e26bd | 1965 | |
5eb91c98 DG |
1966 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1967 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1968 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1969 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1970 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1971 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1972 | |
5eb91c98 DG |
1973 | /* |
1974 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1975 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1976 | */ |
1977 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1978 | ||
1979 | /* | |
1980 | * Wake the registration queue futex. Implicit memory | |
1981 | * barrier with the exchange in cds_wfq_enqueue. | |
1982 | */ | |
1983 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1984 | } | |
1985 | } | |
90014c57 | 1986 | } |
1d4b027a DG |
1987 | } |
1988 | ||
139ac872 | 1989 | exit: |
1d4b027a | 1990 | error: |
139ac872 | 1991 | if (err) { |
840cb59c | 1992 | health_error(); |
139ac872 MD |
1993 | ERR("Health error occurred in %s", __func__); |
1994 | } | |
139ac872 | 1995 | |
0fdd1e2c DG |
1996 | /* Notify that the registration thread is gone */ |
1997 | notify_ust_apps(0); | |
1998 | ||
a4b35e07 | 1999 | if (apps_sock >= 0) { |
76d7553f MD |
2000 | ret = close(apps_sock); |
2001 | if (ret) { | |
2002 | PERROR("close"); | |
2003 | } | |
a4b35e07 | 2004 | } |
46c3f085 | 2005 | if (sock >= 0) { |
76d7553f MD |
2006 | ret = close(sock); |
2007 | if (ret) { | |
2008 | PERROR("close"); | |
2009 | } | |
4063050c | 2010 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2011 | } |
273ea72c | 2012 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2013 | |
76d7553f | 2014 | error_poll_add: |
5eb91c98 | 2015 | lttng_poll_clean(&events); |
76d7553f MD |
2016 | error_listen: |
2017 | error_create_poll: | |
6993eeb3 | 2018 | error_testpoint: |
76d7553f | 2019 | DBG("UST Registration thread cleanup complete"); |
8782cc74 | 2020 | health_unregister(health_sessiond); |
5eb91c98 | 2021 | |
1d4b027a DG |
2022 | return NULL; |
2023 | } | |
2024 | ||
8c0faa1d | 2025 | /* |
3bd1e081 | 2026 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2027 | * exec or it will fails. |
8c0faa1d | 2028 | */ |
3bd1e081 | 2029 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2030 | { |
a23ec3a7 | 2031 | int ret, clock_ret; |
ee0b0061 DG |
2032 | struct timespec timeout; |
2033 | ||
a23ec3a7 DG |
2034 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2035 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2036 | |
a23ec3a7 DG |
2037 | /* Setup pthread condition */ |
2038 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2039 | if (ret != 0) { | |
2040 | errno = ret; | |
2041 | PERROR("pthread_condattr_init consumer data"); | |
2042 | goto error; | |
2043 | } | |
2044 | ||
2045 | /* | |
2046 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2047 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2048 | * for a more details and how we noticed it. | |
2049 | */ | |
2050 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2051 | if (ret != 0) { | |
2052 | errno = ret; | |
2053 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2054 | goto error; |
2055 | } | |
8c0faa1d | 2056 | |
a23ec3a7 DG |
2057 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2058 | if (ret != 0) { | |
2059 | errno = ret; | |
2060 | PERROR("pthread_cond_init consumer data"); | |
2061 | goto error; | |
2062 | } | |
2063 | ||
2064 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2065 | consumer_data); | |
8c0faa1d | 2066 | if (ret != 0) { |
3bd1e081 | 2067 | PERROR("pthread_create consumer"); |
ee0b0061 | 2068 | ret = -1; |
8c0faa1d DG |
2069 | goto error; |
2070 | } | |
2071 | ||
a23ec3a7 DG |
2072 | /* We are about to wait on a pthread condition */ |
2073 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2074 | ||
ee0b0061 | 2075 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2076 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2077 | /* | |
2078 | * Set the timeout for the condition timed wait even if the clock gettime | |
2079 | * call fails since we might loop on that call and we want to avoid to | |
2080 | * increment the timeout too many times. | |
2081 | */ | |
2082 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2083 | ||
2084 | /* | |
2085 | * The following loop COULD be skipped in some conditions so this is why we | |
2086 | * set ret to 0 in order to make sure at least one round of the loop is | |
2087 | * done. | |
2088 | */ | |
2089 | ret = 0; | |
2090 | ||
2091 | /* | |
2092 | * Loop until the condition is reached or when a timeout is reached. Note | |
2093 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2094 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2095 | * possible. This loop does not take any chances and works with both of | |
2096 | * them. | |
2097 | */ | |
2098 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2099 | if (clock_ret < 0) { | |
2100 | PERROR("clock_gettime spawn consumer"); | |
2101 | /* Infinite wait for the consumerd thread to be ready */ | |
2102 | ret = pthread_cond_wait(&consumer_data->cond, | |
2103 | &consumer_data->cond_mutex); | |
2104 | } else { | |
2105 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2106 | &consumer_data->cond_mutex, &timeout); | |
2107 | } | |
ee0b0061 | 2108 | } |
8c0faa1d | 2109 | |
a23ec3a7 DG |
2110 | /* Release the pthread condition */ |
2111 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2112 | ||
2113 | if (ret != 0) { | |
2114 | errno = ret; | |
2115 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
2116 | /* |
2117 | * Call has timed out so we kill the kconsumerd_thread and return | |
2118 | * an error. | |
2119 | */ | |
a23ec3a7 DG |
2120 | ERR("Condition timed out. The consumer thread was never ready." |
2121 | " Killing it"); | |
3bd1e081 | 2122 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 2123 | if (ret < 0) { |
3bd1e081 | 2124 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2125 | } |
2126 | } else { | |
a23ec3a7 | 2127 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
2128 | } |
2129 | goto error; | |
2130 | } | |
2131 | ||
3bd1e081 MD |
2132 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2133 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2134 | ERR("Consumerd did not start"); |
3bd1e081 | 2135 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2136 | goto error; |
2137 | } | |
3bd1e081 | 2138 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2139 | |
8c0faa1d DG |
2140 | return 0; |
2141 | ||
2142 | error: | |
2143 | return ret; | |
2144 | } | |
2145 | ||
d9800920 | 2146 | /* |
3bd1e081 | 2147 | * Join consumer thread |
d9800920 | 2148 | */ |
3bd1e081 | 2149 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2150 | { |
2151 | void *status; | |
cf3af59e | 2152 | |
e8209f6b DG |
2153 | /* Consumer pid must be a real one. */ |
2154 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2155 | int ret; |
3bd1e081 | 2156 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2157 | if (ret) { |
3bd1e081 | 2158 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2159 | return ret; |
2160 | } | |
3bd1e081 | 2161 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2162 | } else { |
2163 | return 0; | |
2164 | } | |
2165 | } | |
2166 | ||
8c0faa1d | 2167 | /* |
3bd1e081 | 2168 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2169 | * |
d063d709 | 2170 | * Return pid if successful else -1. |
8c0faa1d | 2171 | */ |
3bd1e081 | 2172 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2173 | { |
2174 | int ret; | |
2175 | pid_t pid; | |
94c55f17 | 2176 | const char *consumer_to_use; |
53086306 | 2177 | const char *verbosity; |
94c55f17 | 2178 | struct stat st; |
8c0faa1d | 2179 | |
3bd1e081 | 2180 | DBG("Spawning consumerd"); |
c49dc785 | 2181 | |
8c0faa1d DG |
2182 | pid = fork(); |
2183 | if (pid == 0) { | |
2184 | /* | |
3bd1e081 | 2185 | * Exec consumerd. |
8c0faa1d | 2186 | */ |
daee5345 | 2187 | if (opt_verbose_consumer) { |
53086306 DG |
2188 | verbosity = "--verbose"; |
2189 | } else { | |
2190 | verbosity = "--quiet"; | |
2191 | } | |
3bd1e081 MD |
2192 | switch (consumer_data->type) { |
2193 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2194 | /* |
c7704d57 DG |
2195 | * Find out which consumerd to execute. We will first try the |
2196 | * 64-bit path, then the sessiond's installation directory, and | |
2197 | * fallback on the 32-bit one, | |
94c55f17 | 2198 | */ |
63a799e8 AM |
2199 | DBG3("Looking for a kernel consumer at these locations:"); |
2200 | DBG3(" 1) %s", consumerd64_bin); | |
2201 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2202 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2203 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2204 | DBG3("Found location #1"); |
94c55f17 | 2205 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2206 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2207 | DBG3("Found location #2"); |
94c55f17 | 2208 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2209 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2210 | DBG3("Found location #3"); |
eb1e0bd4 | 2211 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2212 | } else { |
63a799e8 | 2213 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2214 | break; |
2215 | } | |
2216 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
2217 | execl(consumer_to_use, | |
2218 | "lttng-consumerd", verbosity, "-k", | |
2219 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2220 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2221 | "--group", tracing_group_name, |
94c55f17 | 2222 | NULL); |
3bd1e081 | 2223 | break; |
7753dea8 MD |
2224 | case LTTNG_CONSUMER64_UST: |
2225 | { | |
b1e0b6b6 | 2226 | char *tmpnew = NULL; |
8f4905da MD |
2227 | |
2228 | if (consumerd64_libdir[0] != '\0') { | |
2229 | char *tmp; | |
2230 | size_t tmplen; | |
2231 | ||
2232 | tmp = getenv("LD_LIBRARY_PATH"); | |
2233 | if (!tmp) { | |
2234 | tmp = ""; | |
2235 | } | |
2236 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2237 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2238 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2239 | if (!tmpnew) { | |
2240 | ret = -ENOMEM; | |
2241 | goto error; | |
2242 | } | |
2243 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2244 | strcat(tmpnew, consumerd64_libdir); | |
2245 | if (tmp[0] != '\0') { | |
2246 | strcat(tmpnew, ":"); | |
2247 | strcat(tmpnew, tmp); | |
2248 | } | |
2249 | ret = putenv(tmpnew); | |
2250 | if (ret) { | |
2251 | ret = -errno; | |
c6f76da9 | 2252 | free(tmpnew); |
8f4905da MD |
2253 | goto error; |
2254 | } | |
2255 | } | |
94c55f17 | 2256 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2257 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2258 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2259 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2260 | "--group", tracing_group_name, |
7753dea8 | 2261 | NULL); |
8f4905da MD |
2262 | if (consumerd64_libdir[0] != '\0') { |
2263 | free(tmpnew); | |
2264 | } | |
2265 | if (ret) { | |
2266 | goto error; | |
2267 | } | |
3bd1e081 | 2268 | break; |
7753dea8 MD |
2269 | } |
2270 | case LTTNG_CONSUMER32_UST: | |
2271 | { | |
937dde8e | 2272 | char *tmpnew = NULL; |
8f4905da MD |
2273 | |
2274 | if (consumerd32_libdir[0] != '\0') { | |
2275 | char *tmp; | |
2276 | size_t tmplen; | |
2277 | ||
2278 | tmp = getenv("LD_LIBRARY_PATH"); | |
2279 | if (!tmp) { | |
2280 | tmp = ""; | |
2281 | } | |
2282 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2283 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2284 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2285 | if (!tmpnew) { | |
2286 | ret = -ENOMEM; | |
2287 | goto error; | |
2288 | } | |
2289 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2290 | strcat(tmpnew, consumerd32_libdir); | |
2291 | if (tmp[0] != '\0') { | |
2292 | strcat(tmpnew, ":"); | |
2293 | strcat(tmpnew, tmp); | |
2294 | } | |
2295 | ret = putenv(tmpnew); | |
2296 | if (ret) { | |
2297 | ret = -errno; | |
c6f76da9 | 2298 | free(tmpnew); |
8f4905da MD |
2299 | goto error; |
2300 | } | |
2301 | } | |
94c55f17 | 2302 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2303 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2304 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2305 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2306 | "--group", tracing_group_name, |
7753dea8 | 2307 | NULL); |
8f4905da MD |
2308 | if (consumerd32_libdir[0] != '\0') { |
2309 | free(tmpnew); | |
2310 | } | |
2311 | if (ret) { | |
2312 | goto error; | |
2313 | } | |
7753dea8 MD |
2314 | break; |
2315 | } | |
3bd1e081 | 2316 | default: |
76d7553f | 2317 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2318 | exit(EXIT_FAILURE); |
2319 | } | |
8c0faa1d | 2320 | if (errno != 0) { |
76d7553f | 2321 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2322 | } |
2323 | exit(EXIT_FAILURE); | |
2324 | } else if (pid > 0) { | |
2325 | ret = pid; | |
8c0faa1d | 2326 | } else { |
76d7553f | 2327 | PERROR("start consumer fork"); |
8c0faa1d | 2328 | ret = -errno; |
8c0faa1d | 2329 | } |
8f4905da | 2330 | error: |
8c0faa1d DG |
2331 | return ret; |
2332 | } | |
2333 | ||
693bd40b | 2334 | /* |
3bd1e081 | 2335 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2336 | */ |
3bd1e081 | 2337 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2338 | { |
c617c0c6 | 2339 | int ret; |
edb8b045 DG |
2340 | |
2341 | /* | |
2342 | * Set the listen() state on the socket since there is a possible race | |
2343 | * between the exec() of the consumer daemon and this call if place in the | |
2344 | * consumer thread. See bug #366 for more details. | |
2345 | */ | |
2346 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2347 | if (ret < 0) { | |
2348 | goto error; | |
2349 | } | |
693bd40b | 2350 | |
3bd1e081 MD |
2351 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2352 | if (consumer_data->pid != 0) { | |
2353 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2354 | goto end; |
2355 | } | |
693bd40b | 2356 | |
3bd1e081 | 2357 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2358 | if (ret < 0) { |
3bd1e081 MD |
2359 | ERR("Spawning consumerd failed"); |
2360 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2361 | goto error; |
693bd40b | 2362 | } |
c49dc785 | 2363 | |
3bd1e081 MD |
2364 | /* Setting up the consumer_data pid */ |
2365 | consumer_data->pid = ret; | |
48842b30 | 2366 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2367 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2368 | |
3bd1e081 MD |
2369 | DBG2("Spawning consumer control thread"); |
2370 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2371 | if (ret < 0) { |
3bd1e081 | 2372 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2373 | goto error; |
2374 | } | |
2375 | ||
c49dc785 | 2376 | end: |
693bd40b DG |
2377 | return 0; |
2378 | ||
2379 | error: | |
331744e3 | 2380 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2381 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2382 | int err; |
2383 | ||
edb8b045 DG |
2384 | err = close(consumer_data->err_sock); |
2385 | if (err < 0) { | |
2386 | PERROR("close consumer data error socket"); | |
2387 | } | |
2388 | } | |
693bd40b DG |
2389 | return ret; |
2390 | } | |
2391 | ||
b73401da | 2392 | /* |
096102bd | 2393 | * Setup necessary data for kernel tracer action. |
b73401da | 2394 | */ |
096102bd | 2395 | static int init_kernel_tracer(void) |
b73401da DG |
2396 | { |
2397 | int ret; | |
b73401da | 2398 | |
096102bd DG |
2399 | /* Modprobe lttng kernel modules */ |
2400 | ret = modprobe_lttng_control(); | |
b73401da | 2401 | if (ret < 0) { |
b73401da DG |
2402 | goto error; |
2403 | } | |
2404 | ||
096102bd DG |
2405 | /* Open debugfs lttng */ |
2406 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2407 | if (kernel_tracer_fd < 0) { | |
2408 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2409 | ret = -1; |
2410 | goto error_open; | |
54d01ffb DG |
2411 | } |
2412 | ||
2f77fc4b DG |
2413 | /* Validate kernel version */ |
2414 | ret = kernel_validate_version(kernel_tracer_fd); | |
2415 | if (ret < 0) { | |
2416 | goto error_version; | |
b551a063 | 2417 | } |
54d01ffb | 2418 | |
2f77fc4b DG |
2419 | ret = modprobe_lttng_data(); |
2420 | if (ret < 0) { | |
2421 | goto error_modules; | |
54d01ffb DG |
2422 | } |
2423 | ||
2f77fc4b DG |
2424 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2425 | return 0; | |
2426 | ||
2427 | error_version: | |
2428 | modprobe_remove_lttng_control(); | |
2429 | ret = close(kernel_tracer_fd); | |
2430 | if (ret) { | |
2431 | PERROR("close"); | |
b551a063 | 2432 | } |
2f77fc4b | 2433 | kernel_tracer_fd = -1; |
f73fabfd | 2434 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2435 | |
2f77fc4b DG |
2436 | error_modules: |
2437 | ret = close(kernel_tracer_fd); | |
2438 | if (ret) { | |
2439 | PERROR("close"); | |
b551a063 | 2440 | } |
54d01ffb | 2441 | |
2f77fc4b DG |
2442 | error_open: |
2443 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2444 | |
2445 | error: | |
2f77fc4b DG |
2446 | WARN("No kernel tracer available"); |
2447 | kernel_tracer_fd = -1; | |
2448 | if (!is_root) { | |
f73fabfd | 2449 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2450 | } else { |
f73fabfd | 2451 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2452 | } |
54d01ffb DG |
2453 | } |
2454 | ||
2f77fc4b | 2455 | |
54d01ffb | 2456 | /* |
2f77fc4b DG |
2457 | * Copy consumer output from the tracing session to the domain session. The |
2458 | * function also applies the right modification on a per domain basis for the | |
2459 | * trace files destination directory. | |
36b588ed MD |
2460 | * |
2461 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2462 | */ |
2f77fc4b | 2463 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2464 | { |
2465 | int ret; | |
2f77fc4b DG |
2466 | const char *dir_name; |
2467 | struct consumer_output *consumer; | |
2468 | ||
2469 | assert(session); | |
2470 | assert(session->consumer); | |
54d01ffb | 2471 | |
b551a063 DG |
2472 | switch (domain) { |
2473 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2474 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2475 | /* |
2476 | * XXX: We should audit the session creation and what this function | |
2477 | * does "extra" in order to avoid a destroy since this function is used | |
2478 | * in the domain session creation (kernel and ust) only. Same for UST | |
2479 | * domain. | |
2480 | */ | |
2481 | if (session->kernel_session->consumer) { | |
2482 | consumer_destroy_output(session->kernel_session->consumer); | |
2483 | } | |
2f77fc4b DG |
2484 | session->kernel_session->consumer = |
2485 | consumer_copy_output(session->consumer); | |
2486 | /* Ease our life a bit for the next part */ | |
2487 | consumer = session->kernel_session->consumer; | |
2488 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2489 | break; |
f20baf8e | 2490 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2491 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2492 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2493 | if (session->ust_session->consumer) { |
2494 | consumer_destroy_output(session->ust_session->consumer); | |
2495 | } | |
2f77fc4b DG |
2496 | session->ust_session->consumer = |
2497 | consumer_copy_output(session->consumer); | |
2498 | /* Ease our life a bit for the next part */ | |
2499 | consumer = session->ust_session->consumer; | |
2500 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2501 | break; |
2502 | default: | |
f73fabfd | 2503 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2504 | goto error; |
2505 | } | |
2506 | ||
2f77fc4b | 2507 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2508 | strncat(consumer->subdir, dir_name, |
2509 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2510 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2511 | ||
f73fabfd | 2512 | ret = LTTNG_OK; |
54d01ffb DG |
2513 | |
2514 | error: | |
2515 | return ret; | |
2516 | } | |
2517 | ||
00e2e675 | 2518 | /* |
2f77fc4b | 2519 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2520 | * |
2521 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2522 | */ |
2f77fc4b DG |
2523 | static int create_ust_session(struct ltt_session *session, |
2524 | struct lttng_domain *domain) | |
00e2e675 DG |
2525 | { |
2526 | int ret; | |
2f77fc4b | 2527 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2528 | |
a4b92340 | 2529 | assert(session); |
2f77fc4b DG |
2530 | assert(domain); |
2531 | assert(session->consumer); | |
a4b92340 | 2532 | |
2f77fc4b | 2533 | switch (domain->type) { |
f20baf8e | 2534 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2535 | case LTTNG_DOMAIN_UST: |
2536 | break; | |
2537 | default: | |
2538 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2539 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2540 | goto error; |
2541 | } | |
2542 | ||
2f77fc4b DG |
2543 | DBG("Creating UST session"); |
2544 | ||
dec56f6c | 2545 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2546 | if (lus == NULL) { |
f73fabfd | 2547 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2548 | goto error; |
2549 | } | |
2550 | ||
2f77fc4b DG |
2551 | lus->uid = session->uid; |
2552 | lus->gid = session->gid; | |
2bba9e53 | 2553 | lus->output_traces = session->output_traces; |
27babd3a | 2554 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2555 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2556 | session->ust_session = lus; |
00e2e675 | 2557 | |
2f77fc4b DG |
2558 | /* Copy session output to the newly created UST session */ |
2559 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2560 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2561 | goto error; |
2562 | } | |
2563 | ||
f73fabfd | 2564 | return LTTNG_OK; |
00e2e675 DG |
2565 | |
2566 | error: | |
2f77fc4b DG |
2567 | free(lus); |
2568 | session->ust_session = NULL; | |
00e2e675 DG |
2569 | return ret; |
2570 | } | |
2571 | ||
2572 | /* | |
2f77fc4b | 2573 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2574 | */ |
2f77fc4b | 2575 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2576 | { |
2577 | int ret; | |
a4b92340 | 2578 | |
2f77fc4b | 2579 | DBG("Creating kernel session"); |
00e2e675 | 2580 | |
2f77fc4b DG |
2581 | ret = kernel_create_session(session, kernel_tracer_fd); |
2582 | if (ret < 0) { | |
f73fabfd | 2583 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2584 | goto error; |
2585 | } | |
2586 | ||
2f77fc4b DG |
2587 | /* Code flow safety */ |
2588 | assert(session->kernel_session); | |
2589 | ||
2590 | /* Copy session output to the newly created Kernel session */ | |
2591 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2592 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2593 | goto error; |
2594 | } | |
2595 | ||
2f77fc4b DG |
2596 | /* Create directory(ies) on local filesystem. */ |
2597 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2598 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2599 | ret = run_as_mkdir_recursive( | |
2600 | session->kernel_session->consumer->dst.trace_path, | |
2601 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2602 | if (ret < 0) { | |
2603 | if (ret != -EEXIST) { | |
2604 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2605 | goto error; |
2606 | } | |
00e2e675 | 2607 | } |
2f77fc4b | 2608 | } |
00e2e675 | 2609 | |
2f77fc4b DG |
2610 | session->kernel_session->uid = session->uid; |
2611 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2612 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2613 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2614 | |
f73fabfd | 2615 | return LTTNG_OK; |
00e2e675 | 2616 | |
2f77fc4b DG |
2617 | error: |
2618 | trace_kernel_destroy_session(session->kernel_session); | |
2619 | session->kernel_session = NULL; | |
2620 | return ret; | |
2621 | } | |
00e2e675 | 2622 | |
2f77fc4b DG |
2623 | /* |
2624 | * Count number of session permitted by uid/gid. | |
2625 | */ | |
2626 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2627 | { | |
2628 | unsigned int i = 0; | |
2629 | struct ltt_session *session; | |
07424f16 | 2630 | |
2f77fc4b DG |
2631 | DBG("Counting number of available session for UID %d GID %d", |
2632 | uid, gid); | |
2633 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2634 | /* |
2f77fc4b | 2635 | * Only list the sessions the user can control. |
00e2e675 | 2636 | */ |
2f77fc4b DG |
2637 | if (!session_access_ok(session, uid, gid)) { |
2638 | continue; | |
2639 | } | |
2640 | i++; | |
a4b92340 | 2641 | } |
2f77fc4b | 2642 | return i; |
00e2e675 DG |
2643 | } |
2644 | ||
54d01ffb DG |
2645 | /* |
2646 | * Process the command requested by the lttng client within the command | |
2647 | * context structure. This function make sure that the return structure (llm) | |
2648 | * is set and ready for transmission before returning. | |
2649 | * | |
2650 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2651 | * |
2652 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2653 | * |
2654 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2655 | */ |
53a80697 MD |
2656 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2657 | int *sock_error) | |
54d01ffb | 2658 | { |
f73fabfd | 2659 | int ret = LTTNG_OK; |
44d3bd01 | 2660 | int need_tracing_session = 1; |
2e09ba09 | 2661 | int need_domain; |
54d01ffb DG |
2662 | |
2663 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2664 | ||
53a80697 MD |
2665 | *sock_error = 0; |
2666 | ||
2e09ba09 MD |
2667 | switch (cmd_ctx->lsm->cmd_type) { |
2668 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2669 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2670 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2671 | case LTTNG_DESTROY_SESSION: |
2672 | case LTTNG_LIST_SESSIONS: | |
2673 | case LTTNG_LIST_DOMAINS: | |
2674 | case LTTNG_START_TRACE: | |
2675 | case LTTNG_STOP_TRACE: | |
6d805429 | 2676 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2677 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2678 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2679 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2680 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2681 | need_domain = 0; |
3aace903 | 2682 | break; |
2e09ba09 MD |
2683 | default: |
2684 | need_domain = 1; | |
2685 | } | |
2686 | ||
2687 | if (opt_no_kernel && need_domain | |
2688 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2689 | if (!is_root) { |
f73fabfd | 2690 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2691 | } else { |
f73fabfd | 2692 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2693 | } |
4fba7219 DG |
2694 | goto error; |
2695 | } | |
2696 | ||
8d3113b2 DG |
2697 | /* Deny register consumer if we already have a spawned consumer. */ |
2698 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2699 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2700 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2701 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2702 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2703 | goto error; |
2704 | } | |
2705 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2706 | } | |
2707 | ||
54d01ffb DG |
2708 | /* |
2709 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2710 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2711 | * command. |
2712 | */ | |
2713 | switch(cmd_ctx->lsm->cmd_type) { | |
2714 | case LTTNG_LIST_SESSIONS: | |
2715 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2716 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2717 | case LTTNG_LIST_DOMAINS: |
2718 | case LTTNG_LIST_CHANNELS: | |
2719 | case LTTNG_LIST_EVENTS: | |
2720 | break; | |
2721 | default: | |
2722 | /* Setup lttng message with no payload */ | |
2723 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2724 | if (ret < 0) { | |
2725 | /* This label does not try to unlock the session */ | |
2726 | goto init_setup_error; | |
2727 | } | |
2728 | } | |
2729 | ||
2730 | /* Commands that DO NOT need a session. */ | |
2731 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2732 | case LTTNG_CREATE_SESSION: |
27babd3a | 2733 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2734 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2735 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2736 | case LTTNG_LIST_SESSIONS: |
2737 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2738 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2739 | need_tracing_session = 0; |
54d01ffb DG |
2740 | break; |
2741 | default: | |
2742 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2743 | /* |
2744 | * We keep the session list lock across _all_ commands | |
2745 | * for now, because the per-session lock does not | |
2746 | * handle teardown properly. | |
2747 | */ | |
74babd95 | 2748 | session_lock_list(); |
54d01ffb DG |
2749 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2750 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2751 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2752 | goto error; |
2753 | } else { | |
2754 | /* Acquire lock for the session */ | |
2755 | session_lock(cmd_ctx->session); | |
2756 | } | |
2757 | break; | |
2758 | } | |
b389abbe | 2759 | |
2e09ba09 MD |
2760 | if (!need_domain) { |
2761 | goto skip_domain; | |
2762 | } | |
a4b92340 | 2763 | |
54d01ffb DG |
2764 | /* |
2765 | * Check domain type for specific "pre-action". | |
2766 | */ | |
2767 | switch (cmd_ctx->lsm->domain.type) { | |
2768 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2769 | if (!is_root) { |
f73fabfd | 2770 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2771 | goto error; |
2772 | } | |
2773 | ||
54d01ffb | 2774 | /* Kernel tracer check */ |
a4b35e07 | 2775 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2776 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2777 | ret = init_kernel_tracer(); |
2778 | if (ret != 0) { | |
54d01ffb DG |
2779 | goto error; |
2780 | } | |
2781 | } | |
5eb91c98 | 2782 | |
5c827ce0 DG |
2783 | /* Consumer is in an ERROR state. Report back to client */ |
2784 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2785 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2786 | goto error; |
2787 | } | |
2788 | ||
54d01ffb | 2789 | /* Need a session for kernel command */ |
44d3bd01 | 2790 | if (need_tracing_session) { |
54d01ffb | 2791 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2792 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2793 | if (ret < 0) { |
f73fabfd | 2794 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2795 | goto error; |
2796 | } | |
b389abbe | 2797 | } |
7d29a247 | 2798 | |
54d01ffb | 2799 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2800 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2801 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2802 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2803 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2804 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2805 | if (ret < 0) { |
f73fabfd | 2806 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2807 | goto error; |
950131af | 2808 | } |
5c827ce0 | 2809 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2810 | } else { |
2811 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2812 | } |
173af62f | 2813 | |
a4b92340 DG |
2814 | /* |
2815 | * The consumer was just spawned so we need to add the socket to | |
2816 | * the consumer output of the session if exist. | |
2817 | */ | |
2818 | ret = consumer_create_socket(&kconsumer_data, | |
2819 | cmd_ctx->session->kernel_session->consumer); | |
2820 | if (ret < 0) { | |
2821 | goto error; | |
173af62f | 2822 | } |
0d0c377a | 2823 | } |
5c827ce0 | 2824 | |
54d01ffb | 2825 | break; |
b9dfb167 | 2826 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2827 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2828 | { |
b51ec5b4 MD |
2829 | if (!ust_app_supported()) { |
2830 | ret = LTTNG_ERR_NO_UST; | |
2831 | goto error; | |
2832 | } | |
5c827ce0 DG |
2833 | /* Consumer is in an ERROR state. Report back to client */ |
2834 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2835 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2836 | goto error; |
2837 | } | |
2838 | ||
44d3bd01 | 2839 | if (need_tracing_session) { |
a4b92340 | 2840 | /* Create UST session if none exist. */ |
f6a9efaa | 2841 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2842 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2843 | &cmd_ctx->lsm->domain); |
f73fabfd | 2844 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2845 | goto error; |
2846 | } | |
2847 | } | |
00e2e675 | 2848 | |
7753dea8 MD |
2849 | /* Start the UST consumer daemons */ |
2850 | /* 64-bit */ | |
2851 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2852 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2853 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2854 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2855 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2856 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2857 | if (ret < 0) { |
f73fabfd | 2858 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2859 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2860 | goto error; |
2861 | } | |
48842b30 | 2862 | |
173af62f | 2863 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2864 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2865 | } else { |
7753dea8 MD |
2866 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2867 | } | |
173af62f DG |
2868 | |
2869 | /* | |
2870 | * Setup socket for consumer 64 bit. No need for atomic access | |
2871 | * since it was set above and can ONLY be set in this thread. | |
2872 | */ | |
a4b92340 DG |
2873 | ret = consumer_create_socket(&ustconsumer64_data, |
2874 | cmd_ctx->session->ust_session->consumer); | |
2875 | if (ret < 0) { | |
2876 | goto error; | |
173af62f DG |
2877 | } |
2878 | ||
7753dea8 | 2879 | /* 32-bit */ |
fc7a59ce | 2880 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2881 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2882 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2883 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2884 | ret = start_consumerd(&ustconsumer32_data); | |
2885 | if (ret < 0) { | |
f73fabfd | 2886 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2887 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2888 | goto error; |
2889 | } | |
5c827ce0 | 2890 | |
173af62f | 2891 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2892 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2893 | } else { |
2894 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2895 | } |
173af62f DG |
2896 | |
2897 | /* | |
2898 | * Setup socket for consumer 64 bit. No need for atomic access | |
2899 | * since it was set above and can ONLY be set in this thread. | |
2900 | */ | |
a4b92340 DG |
2901 | ret = consumer_create_socket(&ustconsumer32_data, |
2902 | cmd_ctx->session->ust_session->consumer); | |
2903 | if (ret < 0) { | |
2904 | goto error; | |
173af62f | 2905 | } |
44d3bd01 DG |
2906 | } |
2907 | break; | |
48842b30 | 2908 | } |
54d01ffb | 2909 | default: |
54d01ffb DG |
2910 | break; |
2911 | } | |
2e09ba09 | 2912 | skip_domain: |
33a2b854 | 2913 | |
5c827ce0 DG |
2914 | /* Validate consumer daemon state when start/stop trace command */ |
2915 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2916 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2917 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 2918 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
2919 | case LTTNG_DOMAIN_UST: |
2920 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2921 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2922 | goto error; |
2923 | } | |
2924 | break; | |
2925 | case LTTNG_DOMAIN_KERNEL: | |
2926 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2927 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2928 | goto error; |
2929 | } | |
2930 | break; | |
2931 | } | |
2932 | } | |
2933 | ||
8e0af1b4 MD |
2934 | /* |
2935 | * Check that the UID or GID match that of the tracing session. | |
2936 | * The root user can interact with all sessions. | |
2937 | */ | |
2938 | if (need_tracing_session) { | |
2939 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2940 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2941 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2942 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2943 | goto error; |
2944 | } | |
2945 | } | |
2946 | ||
ffe60014 DG |
2947 | /* |
2948 | * Send relayd information to consumer as soon as we have a domain and a | |
2949 | * session defined. | |
2950 | */ | |
2951 | if (cmd_ctx->session && need_domain) { | |
2952 | /* | |
2953 | * Setup relayd if not done yet. If the relayd information was already | |
2954 | * sent to the consumer, this call will gracefully return. | |
2955 | */ | |
2956 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2957 | if (ret != LTTNG_OK) { | |
2958 | goto error; | |
2959 | } | |
2960 | } | |
2961 | ||
54d01ffb DG |
2962 | /* Process by command type */ |
2963 | switch (cmd_ctx->lsm->cmd_type) { | |
2964 | case LTTNG_ADD_CONTEXT: | |
2965 | { | |
2966 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2967 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2968 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2969 | break; |
2970 | } | |
2971 | case LTTNG_DISABLE_CHANNEL: | |
2972 | { | |
2973 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2974 | cmd_ctx->lsm->u.disable.channel_name); | |
2975 | break; | |
2976 | } | |
2977 | case LTTNG_DISABLE_EVENT: | |
2978 | { | |
2979 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2980 | cmd_ctx->lsm->u.disable.channel_name, | |
2981 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2982 | break; |
2983 | } | |
54d01ffb DG |
2984 | case LTTNG_DISABLE_ALL_EVENT: |
2985 | { | |
2bdd86d4 | 2986 | DBG("Disabling all events"); |
54d01ffb DG |
2987 | |
2988 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2989 | cmd_ctx->lsm->u.disable.channel_name); | |
2990 | break; | |
2991 | } | |
2992 | case LTTNG_ENABLE_CHANNEL: | |
2993 | { | |
7972aab2 | 2994 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2995 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2996 | break; |
2997 | } | |
2998 | case LTTNG_ENABLE_EVENT: | |
2999 | { | |
882ef835 JI |
3000 | struct lttng_event_exclusion *exclusion = NULL; |
3001 | struct lttng_filter_bytecode *bytecode = NULL; | |
3002 | ||
67676bd8 DG |
3003 | /* Handle exclusion events and receive it from the client. */ |
3004 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3005 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3006 | ||
3007 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3008 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3009 | if (!exclusion) { | |
3010 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3011 | goto error; | |
882ef835 | 3012 | } |
882ef835 | 3013 | |
67676bd8 DG |
3014 | DBG("Receiving var len exclusion event list from client ..."); |
3015 | exclusion->count = count; | |
3016 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3017 | count * LTTNG_SYMBOL_NAME_LEN); | |
3018 | if (ret <= 0) { | |
3019 | DBG("Nothing recv() from client var len data... continuing"); | |
3020 | *sock_error = 1; | |
3021 | free(exclusion); | |
3022 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3023 | goto error; | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | /* Handle filter and get bytecode from client. */ | |
3028 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3029 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3030 | ||
3031 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3032 | ret = LTTNG_ERR_FILTER_INVAL; | |
3033 | free(exclusion); | |
3034 | goto error; | |
3035 | } | |
3036 | ||
3037 | bytecode = zmalloc(bytecode_len); | |
3038 | if (!bytecode) { | |
3039 | free(exclusion); | |
3040 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3041 | goto error; | |
882ef835 JI |
3042 | } |
3043 | ||
67676bd8 DG |
3044 | /* Receive var. len. data */ |
3045 | DBG("Receiving var len filter's bytecode from client ..."); | |
3046 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3047 | if (ret <= 0) { | |
3048 | DBG("Nothing recv() from client car len data... continuing"); | |
3049 | *sock_error = 1; | |
3050 | free(bytecode); | |
3051 | free(exclusion); | |
3052 | ret = LTTNG_ERR_FILTER_INVAL; | |
3053 | goto error; | |
3054 | } | |
3055 | ||
3056 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
3057 | free(bytecode); | |
3058 | free(exclusion); | |
3059 | ret = LTTNG_ERR_FILTER_INVAL; | |
3060 | goto error; | |
3061 | } | |
882ef835 | 3062 | } |
67676bd8 DG |
3063 | |
3064 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3065 | cmd_ctx->lsm->u.enable.channel_name, | |
3066 | &cmd_ctx->lsm->u.enable.event, bytecode, exclusion, | |
3067 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3068 | break; |
3069 | } | |
3070 | case LTTNG_ENABLE_ALL_EVENT: | |
3071 | { | |
2bdd86d4 | 3072 | DBG("Enabling all events"); |
54d01ffb | 3073 | |
7972aab2 | 3074 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3075 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 3076 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
3077 | break; |
3078 | } | |
052da939 | 3079 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3080 | { |
9f19cc17 | 3081 | struct lttng_event *events; |
54d01ffb | 3082 | ssize_t nb_events; |
052da939 | 3083 | |
54d01ffb DG |
3084 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3085 | if (nb_events < 0) { | |
f73fabfd | 3086 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3087 | ret = -nb_events; |
3088 | goto error; | |
2ef84c95 DG |
3089 | } |
3090 | ||
3091 | /* | |
3092 | * Setup lttng message with payload size set to the event list size in | |
3093 | * bytes and then copy list into the llm payload. | |
3094 | */ | |
052da939 | 3095 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3096 | if (ret < 0) { |
052da939 | 3097 | free(events); |
2ef84c95 DG |
3098 | goto setup_error; |
3099 | } | |
3100 | ||
3101 | /* Copy event list into message payload */ | |
9f19cc17 | 3102 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3103 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3104 | |
9f19cc17 | 3105 | free(events); |
2ef84c95 | 3106 | |
f73fabfd | 3107 | ret = LTTNG_OK; |
2ef84c95 DG |
3108 | break; |
3109 | } | |
f37d259d MD |
3110 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3111 | { | |
3112 | struct lttng_event_field *fields; | |
3113 | ssize_t nb_fields; | |
3114 | ||
a4b92340 DG |
3115 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3116 | &fields); | |
f37d259d | 3117 | if (nb_fields < 0) { |
f73fabfd | 3118 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3119 | ret = -nb_fields; |
3120 | goto error; | |
3121 | } | |
3122 | ||
3123 | /* | |
3124 | * Setup lttng message with payload size set to the event list size in | |
3125 | * bytes and then copy list into the llm payload. | |
3126 | */ | |
a4b92340 DG |
3127 | ret = setup_lttng_msg(cmd_ctx, |
3128 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3129 | if (ret < 0) { |
3130 | free(fields); | |
3131 | goto setup_error; | |
3132 | } | |
3133 | ||
3134 | /* Copy event list into message payload */ | |
3135 | memcpy(cmd_ctx->llm->payload, fields, | |
3136 | sizeof(struct lttng_event_field) * nb_fields); | |
3137 | ||
3138 | free(fields); | |
3139 | ||
f73fabfd | 3140 | ret = LTTNG_OK; |
f37d259d MD |
3141 | break; |
3142 | } | |
00e2e675 DG |
3143 | case LTTNG_SET_CONSUMER_URI: |
3144 | { | |
a4b92340 DG |
3145 | size_t nb_uri, len; |
3146 | struct lttng_uri *uris; | |
3147 | ||
3148 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3149 | len = nb_uri * sizeof(struct lttng_uri); | |
3150 | ||
3151 | if (nb_uri == 0) { | |
f73fabfd | 3152 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3153 | goto error; |
3154 | } | |
3155 | ||
3156 | uris = zmalloc(len); | |
3157 | if (uris == NULL) { | |
f73fabfd | 3158 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3159 | goto error; |
3160 | } | |
3161 | ||
3162 | /* Receive variable len data */ | |
77c7c900 | 3163 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3164 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3165 | if (ret <= 0) { | |
3166 | DBG("No URIs received from client... continuing"); | |
3167 | *sock_error = 1; | |
f73fabfd | 3168 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3169 | free(uris); |
a4b92340 DG |
3170 | goto error; |
3171 | } | |
3172 | ||
00e2e675 | 3173 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3174 | nb_uri, uris); |
f73fabfd | 3175 | if (ret != LTTNG_OK) { |
b1d41407 | 3176 | free(uris); |
a4b92340 DG |
3177 | goto error; |
3178 | } | |
3179 | ||
3180 | /* | |
3181 | * XXX: 0 means that this URI should be applied on the session. Should | |
3182 | * be a DOMAIN enuam. | |
3183 | */ | |
3184 | if (cmd_ctx->lsm->domain.type == 0) { | |
3185 | /* Add the URI for the UST session if a consumer is present. */ | |
3186 | if (cmd_ctx->session->ust_session && | |
3187 | cmd_ctx->session->ust_session->consumer) { | |
3188 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3189 | nb_uri, uris); | |
3190 | } else if (cmd_ctx->session->kernel_session && | |
3191 | cmd_ctx->session->kernel_session->consumer) { | |
3192 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3193 | cmd_ctx->session, nb_uri, uris); | |
3194 | } | |
3195 | } | |
3196 | ||
b1d41407 DG |
3197 | free(uris); |
3198 | ||
00e2e675 DG |
3199 | break; |
3200 | } | |
f3ed775e | 3201 | case LTTNG_START_TRACE: |
8c0faa1d | 3202 | { |
54d01ffb | 3203 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3204 | break; |
3205 | } | |
f3ed775e | 3206 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3207 | { |
54d01ffb | 3208 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3209 | break; |
3210 | } | |
5e16da05 MD |
3211 | case LTTNG_CREATE_SESSION: |
3212 | { | |
a4b92340 DG |
3213 | size_t nb_uri, len; |
3214 | struct lttng_uri *uris = NULL; | |
3215 | ||
3216 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3217 | len = nb_uri * sizeof(struct lttng_uri); | |
3218 | ||
3219 | if (nb_uri > 0) { | |
3220 | uris = zmalloc(len); | |
3221 | if (uris == NULL) { | |
f73fabfd | 3222 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3223 | goto error; |
3224 | } | |
3225 | ||
3226 | /* Receive variable len data */ | |
77c7c900 | 3227 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3228 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3229 | if (ret <= 0) { | |
3230 | DBG("No URIs received from client... continuing"); | |
3231 | *sock_error = 1; | |
f73fabfd | 3232 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3233 | free(uris); |
a4b92340 DG |
3234 | goto error; |
3235 | } | |
3236 | ||
3237 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3238 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3239 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3240 | free(uris); |
a4b92340 DG |
3241 | goto error; |
3242 | } | |
3243 | } | |
3244 | ||
3245 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3246 | &cmd_ctx->creds, 0); |
a4b92340 | 3247 | |
b1d41407 DG |
3248 | free(uris); |
3249 | ||
00e2e675 DG |
3250 | break; |
3251 | } | |
5e16da05 MD |
3252 | case LTTNG_DESTROY_SESSION: |
3253 | { | |
2f77fc4b | 3254 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3255 | |
3256 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3257 | cmd_ctx->session = NULL; |
5461b305 | 3258 | break; |
5e16da05 | 3259 | } |
9f19cc17 | 3260 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3261 | { |
54d01ffb DG |
3262 | ssize_t nb_dom; |
3263 | struct lttng_domain *domains; | |
5461b305 | 3264 | |
54d01ffb DG |
3265 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3266 | if (nb_dom < 0) { | |
f73fabfd | 3267 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3268 | ret = -nb_dom; |
3269 | goto error; | |
ce3d728c | 3270 | } |
520ff687 | 3271 | |
54d01ffb | 3272 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3273 | if (ret < 0) { |
ae9c20bc | 3274 | free(domains); |
5461b305 | 3275 | goto setup_error; |
520ff687 | 3276 | } |
57167058 | 3277 | |
54d01ffb DG |
3278 | /* Copy event list into message payload */ |
3279 | memcpy(cmd_ctx->llm->payload, domains, | |
3280 | nb_dom * sizeof(struct lttng_domain)); | |
3281 | ||
3282 | free(domains); | |
5e16da05 | 3283 | |
f73fabfd | 3284 | ret = LTTNG_OK; |
5e16da05 MD |
3285 | break; |
3286 | } | |
9f19cc17 | 3287 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3288 | { |
6775595e | 3289 | int nb_chan; |
54d01ffb DG |
3290 | struct lttng_channel *channels; |
3291 | ||
b551a063 DG |
3292 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3293 | cmd_ctx->session, &channels); | |
54d01ffb | 3294 | if (nb_chan < 0) { |
f73fabfd | 3295 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3296 | ret = -nb_chan; |
3297 | goto error; | |
5461b305 | 3298 | } |
ca95a216 | 3299 | |
54d01ffb | 3300 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3301 | if (ret < 0) { |
ae9c20bc | 3302 | free(channels); |
5461b305 DG |
3303 | goto setup_error; |
3304 | } | |
9f19cc17 | 3305 | |
54d01ffb DG |
3306 | /* Copy event list into message payload */ |
3307 | memcpy(cmd_ctx->llm->payload, channels, | |
3308 | nb_chan * sizeof(struct lttng_channel)); | |
3309 | ||
3310 | free(channels); | |
9f19cc17 | 3311 | |
f73fabfd | 3312 | ret = LTTNG_OK; |
5461b305 | 3313 | break; |
5e16da05 | 3314 | } |
9f19cc17 | 3315 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3316 | { |
b551a063 | 3317 | ssize_t nb_event; |
684d34d2 | 3318 | struct lttng_event *events = NULL; |
9f19cc17 | 3319 | |
b551a063 | 3320 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3321 | cmd_ctx->lsm->u.list.channel_name, &events); |
3322 | if (nb_event < 0) { | |
f73fabfd | 3323 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3324 | ret = -nb_event; |
3325 | goto error; | |
5461b305 | 3326 | } |
ca95a216 | 3327 | |
54d01ffb | 3328 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3329 | if (ret < 0) { |
ae9c20bc | 3330 | free(events); |
5461b305 DG |
3331 | goto setup_error; |
3332 | } | |
9f19cc17 | 3333 | |
54d01ffb DG |
3334 | /* Copy event list into message payload */ |
3335 | memcpy(cmd_ctx->llm->payload, events, | |
3336 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3337 | |
54d01ffb | 3338 | free(events); |
9f19cc17 | 3339 | |
f73fabfd | 3340 | ret = LTTNG_OK; |
5461b305 | 3341 | break; |
5e16da05 MD |
3342 | } |
3343 | case LTTNG_LIST_SESSIONS: | |
3344 | { | |
8e0af1b4 | 3345 | unsigned int nr_sessions; |
5461b305 | 3346 | |
8e0af1b4 | 3347 | session_lock_list(); |
730389d9 DG |
3348 | nr_sessions = lttng_sessions_count( |
3349 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3350 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3351 | |
8e0af1b4 | 3352 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3353 | if (ret < 0) { |
54d01ffb | 3354 | session_unlock_list(); |
5461b305 | 3355 | goto setup_error; |
e065084a | 3356 | } |
5e16da05 | 3357 | |
6c9cc2ab | 3358 | /* Filled the session array */ |
2f77fc4b | 3359 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3360 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3361 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3362 | |
54d01ffb | 3363 | session_unlock_list(); |
5e16da05 | 3364 | |
f73fabfd | 3365 | ret = LTTNG_OK; |
5e16da05 MD |
3366 | break; |
3367 | } | |
d0254c7c MD |
3368 | case LTTNG_CALIBRATE: |
3369 | { | |
54d01ffb DG |
3370 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3371 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3372 | break; |
3373 | } | |
d9800920 DG |
3374 | case LTTNG_REGISTER_CONSUMER: |
3375 | { | |
2f77fc4b DG |
3376 | struct consumer_data *cdata; |
3377 | ||
3378 | switch (cmd_ctx->lsm->domain.type) { | |
3379 | case LTTNG_DOMAIN_KERNEL: | |
3380 | cdata = &kconsumer_data; | |
3381 | break; | |
3382 | default: | |
f73fabfd | 3383 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3384 | goto error; |
3385 | } | |
3386 | ||
54d01ffb | 3387 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3388 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3389 | break; |
3390 | } | |
6d805429 | 3391 | case LTTNG_DATA_PENDING: |
806e2684 | 3392 | { |
6d805429 | 3393 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3394 | break; |
3395 | } | |
da3c9ec1 DG |
3396 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3397 | { | |
6dc3064a DG |
3398 | struct lttcomm_lttng_output_id reply; |
3399 | ||
3400 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3401 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3402 | if (ret != LTTNG_OK) { | |
3403 | goto error; | |
3404 | } | |
3405 | ||
3406 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3407 | if (ret < 0) { | |
3408 | goto setup_error; | |
3409 | } | |
3410 | ||
3411 | /* Copy output list into message payload */ | |
3412 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3413 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3414 | break; |
3415 | } | |
3416 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3417 | { | |
6dc3064a DG |
3418 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3419 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3420 | break; |
3421 | } | |
3422 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3423 | { | |
6dc3064a DG |
3424 | ssize_t nb_output; |
3425 | struct lttng_snapshot_output *outputs = NULL; | |
3426 | ||
3427 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3428 | if (nb_output < 0) { | |
3429 | ret = -nb_output; | |
3430 | goto error; | |
3431 | } | |
3432 | ||
3433 | ret = setup_lttng_msg(cmd_ctx, | |
3434 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3435 | if (ret < 0) { | |
3436 | free(outputs); | |
3437 | goto setup_error; | |
3438 | } | |
3439 | ||
3440 | if (outputs) { | |
3441 | /* Copy output list into message payload */ | |
3442 | memcpy(cmd_ctx->llm->payload, outputs, | |
3443 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3444 | free(outputs); | |
3445 | } | |
3446 | ||
3447 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3448 | break; |
3449 | } | |
3450 | case LTTNG_SNAPSHOT_RECORD: | |
3451 | { | |
6dc3064a DG |
3452 | ret = cmd_snapshot_record(cmd_ctx->session, |
3453 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3454 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3455 | break; |
3456 | } | |
27babd3a DG |
3457 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3458 | { | |
3459 | size_t nb_uri, len; | |
3460 | struct lttng_uri *uris = NULL; | |
3461 | ||
3462 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3463 | len = nb_uri * sizeof(struct lttng_uri); | |
3464 | ||
3465 | if (nb_uri > 0) { | |
3466 | uris = zmalloc(len); | |
3467 | if (uris == NULL) { | |
3468 | ret = LTTNG_ERR_FATAL; | |
3469 | goto error; | |
3470 | } | |
3471 | ||
3472 | /* Receive variable len data */ | |
3473 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3474 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3475 | if (ret <= 0) { | |
3476 | DBG("No URIs received from client... continuing"); | |
3477 | *sock_error = 1; | |
3478 | ret = LTTNG_ERR_SESSION_FAIL; | |
3479 | free(uris); | |
3480 | goto error; | |
3481 | } | |
3482 | ||
3483 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3484 | DBG("Creating session with ONE network URI is a bad call"); | |
3485 | ret = LTTNG_ERR_SESSION_FAIL; | |
3486 | free(uris); | |
3487 | goto error; | |
3488 | } | |
3489 | } | |
3490 | ||
3491 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3492 | nb_uri, &cmd_ctx->creds); | |
3493 | free(uris); | |
3494 | break; | |
3495 | } | |
ecc48a90 JD |
3496 | case LTTNG_CREATE_SESSION_LIVE: |
3497 | { | |
3498 | size_t nb_uri, len; | |
3499 | struct lttng_uri *uris = NULL; | |
3500 | ||
3501 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3502 | len = nb_uri * sizeof(struct lttng_uri); | |
3503 | ||
3504 | if (nb_uri > 0) { | |
3505 | uris = zmalloc(len); | |
3506 | if (uris == NULL) { | |
3507 | ret = LTTNG_ERR_FATAL; | |
3508 | goto error; | |
3509 | } | |
3510 | ||
3511 | /* Receive variable len data */ | |
3512 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3513 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3514 | if (ret <= 0) { | |
3515 | DBG("No URIs received from client... continuing"); | |
3516 | *sock_error = 1; | |
3517 | ret = LTTNG_ERR_SESSION_FAIL; | |
3518 | free(uris); | |
3519 | goto error; | |
3520 | } | |
3521 | ||
3522 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3523 | DBG("Creating session with ONE network URI is a bad call"); | |
3524 | ret = LTTNG_ERR_SESSION_FAIL; | |
3525 | free(uris); | |
3526 | goto error; | |
3527 | } | |
3528 | } | |
3529 | ||
3530 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3531 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3532 | free(uris); | |
3533 | break; | |
3534 | } | |
5e16da05 | 3535 | default: |
f73fabfd | 3536 | ret = LTTNG_ERR_UND; |
5461b305 | 3537 | break; |
fac6795d DG |
3538 | } |
3539 | ||
5461b305 | 3540 | error: |
5461b305 DG |
3541 | if (cmd_ctx->llm == NULL) { |
3542 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3543 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3544 | goto setup_error; |
3545 | } | |
3546 | } | |
54d01ffb | 3547 | /* Set return code */ |
5461b305 | 3548 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3549 | setup_error: |
b5541356 | 3550 | if (cmd_ctx->session) { |
54d01ffb | 3551 | session_unlock(cmd_ctx->session); |
b5541356 | 3552 | } |
256a5576 MD |
3553 | if (need_tracing_session) { |
3554 | session_unlock_list(); | |
3555 | } | |
54d01ffb | 3556 | init_setup_error: |
8028d920 | 3557 | return ret; |
fac6795d DG |
3558 | } |
3559 | ||
44a5e5eb DG |
3560 | /* |
3561 | * Thread managing health check socket. | |
3562 | */ | |
3563 | static void *thread_manage_health(void *data) | |
3564 | { | |
eb4a2943 | 3565 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3566 | uint32_t revents, nb_fd; |
3567 | struct lttng_poll_event events; | |
0c89d795 MD |
3568 | struct health_comm_msg msg; |
3569 | struct health_comm_reply reply; | |
44a5e5eb DG |
3570 | |
3571 | DBG("[thread] Manage health check started"); | |
3572 | ||
3573 | rcu_register_thread(); | |
3574 | ||
6d737ce4 DG |
3575 | /* We might hit an error path before this is created. */ |
3576 | lttng_poll_init(&events); | |
3cc04881 | 3577 | |
44a5e5eb DG |
3578 | /* Create unix socket */ |
3579 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3580 | if (sock < 0) { | |
3581 | ERR("Unable to create health check Unix socket"); | |
3582 | ret = -1; | |
3583 | goto error; | |
3584 | } | |
3585 | ||
6c71277b MD |
3586 | if (is_root) { |
3587 | /* lttng health client socket path permissions */ | |
3588 | ret = chown(health_unix_sock_path, 0, | |
3589 | utils_get_group_id(tracing_group_name)); | |
3590 | if (ret < 0) { | |
3591 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3592 | PERROR("chown"); | |
3593 | ret = -1; | |
3594 | goto error; | |
3595 | } | |
3596 | ||
3597 | ret = chmod(health_unix_sock_path, | |
3598 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3599 | if (ret < 0) { | |
3600 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3601 | PERROR("chmod"); | |
3602 | ret = -1; | |
3603 | goto error; | |
3604 | } | |
3605 | } | |
3606 | ||
b662582b DG |
3607 | /* |
3608 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3609 | * show must go on. | |
3610 | */ | |
3611 | (void) utils_set_fd_cloexec(sock); | |
3612 | ||
44a5e5eb DG |
3613 | ret = lttcomm_listen_unix_sock(sock); |
3614 | if (ret < 0) { | |
3615 | goto error; | |
3616 | } | |
3617 | ||
3618 | /* | |
3619 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3620 | * more will be added to this poll set. | |
3621 | */ | |
d0b96690 | 3622 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3623 | if (ret < 0) { |
3624 | goto error; | |
3625 | } | |
3626 | ||
3627 | /* Add the application registration socket */ | |
3628 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3629 | if (ret < 0) { | |
3630 | goto error; | |
3631 | } | |
3632 | ||
3633 | while (1) { | |
3634 | DBG("Health check ready"); | |
3635 | ||
44a5e5eb DG |
3636 | /* Inifinite blocking call, waiting for transmission */ |
3637 | restart: | |
3638 | ret = lttng_poll_wait(&events, -1); | |
3639 | if (ret < 0) { | |
3640 | /* | |
3641 | * Restart interrupted system call. | |
3642 | */ | |
3643 | if (errno == EINTR) { | |
3644 | goto restart; | |
3645 | } | |
3646 | goto error; | |
3647 | } | |
3648 | ||
0d9c5d77 DG |
3649 | nb_fd = ret; |
3650 | ||
44a5e5eb DG |
3651 | for (i = 0; i < nb_fd; i++) { |
3652 | /* Fetch once the poll data */ | |
3653 | revents = LTTNG_POLL_GETEV(&events, i); | |
3654 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3655 | ||
3656 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3657 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3658 | if (ret) { |
139ac872 MD |
3659 | err = 0; |
3660 | goto exit; | |
44a5e5eb DG |
3661 | } |
3662 | ||
3663 | /* Event on the registration socket */ | |
3664 | if (pollfd == sock) { | |
3665 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3666 | ERR("Health socket poll error"); | |
3667 | goto error; | |
3668 | } | |
3669 | } | |
3670 | } | |
3671 | ||
3672 | new_sock = lttcomm_accept_unix_sock(sock); | |
3673 | if (new_sock < 0) { | |
3674 | goto error; | |
3675 | } | |
3676 | ||
b662582b DG |
3677 | /* |
3678 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3679 | * show must go on. | |
3680 | */ | |
3681 | (void) utils_set_fd_cloexec(new_sock); | |
3682 | ||
44a5e5eb DG |
3683 | DBG("Receiving data from client for health..."); |
3684 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3685 | if (ret <= 0) { | |
3686 | DBG("Nothing recv() from client... continuing"); | |
3687 | ret = close(new_sock); | |
3688 | if (ret) { | |
3689 | PERROR("close"); | |
3690 | } | |
3691 | new_sock = -1; | |
3692 | continue; | |
3693 | } | |
3694 | ||
3695 | rcu_thread_online(); | |
3696 | ||
6c71277b MD |
3697 | reply.ret_code = 0; |
3698 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { | |
3699 | /* | |
3700 | * health_check_state returns 0 if health is | |
3701 | * bad. | |
3702 | */ | |
3703 | if (!health_check_state(health_sessiond, i)) { | |
3704 | reply.ret_code |= 1ULL << i; | |
3705 | } | |
44a5e5eb DG |
3706 | } |
3707 | ||
6c71277b | 3708 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3709 | |
3710 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3711 | if (ret < 0) { | |
3712 | ERR("Failed to send health data back to client"); | |
3713 | } | |
3714 | ||
3715 | /* End of transmission */ | |
3716 | ret = close(new_sock); | |
3717 | if (ret) { | |
3718 | PERROR("close"); | |
3719 | } | |
3720 | new_sock = -1; | |
3721 | } | |
3722 | ||
139ac872 | 3723 | exit: |
44a5e5eb | 3724 | error: |
139ac872 MD |
3725 | if (err) { |
3726 | ERR("Health error occurred in %s", __func__); | |
3727 | } | |
44a5e5eb DG |
3728 | DBG("Health check thread dying"); |
3729 | unlink(health_unix_sock_path); | |
3730 | if (sock >= 0) { | |
3731 | ret = close(sock); | |
3732 | if (ret) { | |
3733 | PERROR("close"); | |
3734 | } | |
3735 | } | |
44a5e5eb DG |
3736 | |
3737 | lttng_poll_clean(&events); | |
3738 | ||
3739 | rcu_unregister_thread(); | |
3740 | return NULL; | |
3741 | } | |
3742 | ||
1d4b027a | 3743 | /* |
d063d709 DG |
3744 | * This thread manage all clients request using the unix client socket for |
3745 | * communication. | |
1d4b027a DG |
3746 | */ |
3747 | static void *thread_manage_clients(void *data) | |
3748 | { | |
139ac872 | 3749 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3750 | int sock_error; |
5eb91c98 | 3751 | uint32_t revents, nb_fd; |
273ea72c | 3752 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3753 | struct lttng_poll_event events; |
1d4b027a DG |
3754 | |
3755 | DBG("[thread] Manage client started"); | |
3756 | ||
f6a9efaa DG |
3757 | rcu_register_thread(); |
3758 | ||
6c71277b | 3759 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3760 | |
6993eeb3 CB |
3761 | if (testpoint(thread_manage_clients)) { |
3762 | goto error_testpoint; | |
3763 | } | |
3764 | ||
840cb59c | 3765 | health_code_update(); |
44a5e5eb | 3766 | |
1d4b027a DG |
3767 | ret = lttcomm_listen_unix_sock(client_sock); |
3768 | if (ret < 0) { | |
35df2755 | 3769 | goto error_listen; |
1d4b027a DG |
3770 | } |
3771 | ||
5eb91c98 DG |
3772 | /* |
3773 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3774 | * more will be added to this poll set. | |
3775 | */ | |
d0b96690 | 3776 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3777 | if (ret < 0) { |
35df2755 | 3778 | goto error_create_poll; |
5eb91c98 | 3779 | } |
273ea72c | 3780 | |
5eb91c98 DG |
3781 | /* Add the application registration socket */ |
3782 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3783 | if (ret < 0) { | |
3784 | goto error; | |
3785 | } | |
273ea72c | 3786 | |
bbd973c2 DG |
3787 | /* |
3788 | * Notify parent pid that we are ready to accept command for client side. | |
0bb7724a | 3789 | * This ppid is the one from the external process that spawned us. |
1d4b027a DG |
3790 | */ |
3791 | if (opt_sig_parent) { | |
8db8d1dc | 3792 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3793 | } |
3794 | ||
0bb7724a DG |
3795 | /* Notify the parent of the fork() process that we are ready. */ |
3796 | if (opt_daemon) { | |
3797 | kill(child_ppid, SIGUSR1); | |
3798 | } | |
3799 | ||
6993eeb3 CB |
3800 | if (testpoint(thread_manage_clients_before_loop)) { |
3801 | goto error; | |
3802 | } | |
8ac94142 | 3803 | |
840cb59c | 3804 | health_code_update(); |
44a5e5eb | 3805 | |
1d4b027a | 3806 | while (1) { |
1d4b027a | 3807 | DBG("Accepting client command ..."); |
273ea72c DG |
3808 | |
3809 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3810 | restart: |
a78af745 | 3811 | health_poll_entry(); |
5eb91c98 | 3812 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3813 | health_poll_exit(); |
273ea72c | 3814 | if (ret < 0) { |
88f2b785 MD |
3815 | /* |
3816 | * Restart interrupted system call. | |
3817 | */ | |
3818 | if (errno == EINTR) { | |
3819 | goto restart; | |
3820 | } | |
273ea72c DG |
3821 | goto error; |
3822 | } | |
3823 | ||
0d9c5d77 DG |
3824 | nb_fd = ret; |
3825 | ||
5eb91c98 DG |
3826 | for (i = 0; i < nb_fd; i++) { |
3827 | /* Fetch once the poll data */ | |
3828 | revents = LTTNG_POLL_GETEV(&events, i); | |
3829 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3830 | ||
840cb59c | 3831 | health_code_update(); |
44a5e5eb | 3832 | |
5eb91c98 | 3833 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3834 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3835 | if (ret) { |
139ac872 MD |
3836 | err = 0; |
3837 | goto exit; | |
5eb91c98 DG |
3838 | } |
3839 | ||
3840 | /* Event on the registration socket */ | |
3841 | if (pollfd == client_sock) { | |
3842 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3843 | ERR("Client socket poll error"); | |
3844 | goto error; | |
3845 | } | |
3846 | } | |
3847 | } | |
3848 | ||
3849 | DBG("Wait for client response"); | |
3850 | ||
840cb59c | 3851 | health_code_update(); |
44a5e5eb | 3852 | |
5eb91c98 DG |
3853 | sock = lttcomm_accept_unix_sock(client_sock); |
3854 | if (sock < 0) { | |
273ea72c | 3855 | goto error; |
273ea72c DG |
3856 | } |
3857 | ||
b662582b DG |
3858 | /* |
3859 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3860 | * show must go on. | |
3861 | */ | |
3862 | (void) utils_set_fd_cloexec(sock); | |
3863 | ||
be040666 DG |
3864 | /* Set socket option for credentials retrieval */ |
3865 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3866 | if (ret < 0) { | |
3867 | goto error; | |
3868 | } | |
3869 | ||
5eb91c98 | 3870 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3871 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3872 | if (cmd_ctx == NULL) { |
76d7553f | 3873 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3874 | goto error; |
5eb91c98 | 3875 | } |
1d4b027a | 3876 | |
5eb91c98 | 3877 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3878 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3879 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3880 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3881 | goto error; |
3882 | } | |
1d4b027a | 3883 | |
5eb91c98 DG |
3884 | cmd_ctx->llm = NULL; |
3885 | cmd_ctx->session = NULL; | |
1d4b027a | 3886 | |
840cb59c | 3887 | health_code_update(); |
44a5e5eb | 3888 | |
5eb91c98 DG |
3889 | /* |
3890 | * Data is received from the lttng client. The struct | |
3891 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3892 | * the client. | |
3893 | */ | |
3894 | DBG("Receiving data from client ..."); | |
be040666 DG |
3895 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3896 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3897 | if (ret <= 0) { |
3898 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3899 | ret = close(sock); |
3900 | if (ret) { | |
3901 | PERROR("close"); | |
3902 | } | |
3903 | sock = -1; | |
a2c0da86 | 3904 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3905 | continue; |
3906 | } | |
1d4b027a | 3907 | |
840cb59c | 3908 | health_code_update(); |
44a5e5eb | 3909 | |
5eb91c98 DG |
3910 | // TODO: Validate cmd_ctx including sanity check for |
3911 | // security purpose. | |
f7776ea7 | 3912 | |
f6a9efaa | 3913 | rcu_thread_online(); |
5eb91c98 DG |
3914 | /* |
3915 | * This function dispatch the work to the kernel or userspace tracer | |
3916 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3917 | * informations for the client. The command context struct contains | |
3918 | * everything this function may needs. | |
3919 | */ | |
53a80697 | 3920 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3921 | rcu_thread_offline(); |
5eb91c98 | 3922 | if (ret < 0) { |
36134aa1 DG |
3923 | ret = close(sock); |
3924 | if (ret) { | |
3925 | PERROR("close"); | |
53a80697 | 3926 | } |
36134aa1 | 3927 | sock = -1; |
bbd973c2 | 3928 | /* |
5eb91c98 | 3929 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3930 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3931 | * (ENOMEM). Error detected but still accept |
3932 | * command, unless a socket error has been | |
3933 | * detected. | |
bbd973c2 | 3934 | */ |
bbd973c2 | 3935 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3936 | continue; |
3937 | } | |
d6e4fca4 | 3938 | |
840cb59c | 3939 | health_code_update(); |
44a5e5eb | 3940 | |
54d01ffb DG |
3941 | DBG("Sending response (size: %d, retcode: %s)", |
3942 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3943 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3944 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3945 | if (ret < 0) { |
3946 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3947 | } |
1d4b027a | 3948 | |
5eb91c98 | 3949 | /* End of transmission */ |
76d7553f MD |
3950 | ret = close(sock); |
3951 | if (ret) { | |
3952 | PERROR("close"); | |
3953 | } | |
3954 | sock = -1; | |
be040666 DG |
3955 | |
3956 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3957 | |
840cb59c | 3958 | health_code_update(); |
273ea72c DG |
3959 | } |
3960 | ||
139ac872 | 3961 | exit: |
5eb91c98 | 3962 | error: |
35df2755 CB |
3963 | if (sock >= 0) { |
3964 | ret = close(sock); | |
3965 | if (ret) { | |
3966 | PERROR("close"); | |
3967 | } | |
139ac872 | 3968 | } |
44a5e5eb | 3969 | |
35df2755 CB |
3970 | lttng_poll_clean(&events); |
3971 | clean_command_ctx(&cmd_ctx); | |
3972 | ||
3973 | error_listen: | |
3974 | error_create_poll: | |
6993eeb3 | 3975 | error_testpoint: |
273ea72c | 3976 | unlink(client_unix_sock_path); |
76d7553f MD |
3977 | if (client_sock >= 0) { |
3978 | ret = close(client_sock); | |
3979 | if (ret) { | |
3980 | PERROR("close"); | |
3981 | } | |
a4b35e07 | 3982 | } |
35df2755 CB |
3983 | |
3984 | if (err) { | |
840cb59c | 3985 | health_error(); |
35df2755 | 3986 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3987 | } |
273ea72c | 3988 | |
8782cc74 | 3989 | health_unregister(health_sessiond); |
35df2755 CB |
3990 | |
3991 | DBG("Client thread dying"); | |
f6a9efaa DG |
3992 | |
3993 | rcu_unregister_thread(); | |
1d4b027a DG |
3994 | return NULL; |
3995 | } | |
3996 | ||
3997 | ||
fac6795d DG |
3998 | /* |
3999 | * usage function on stderr | |
4000 | */ | |
4001 | static void usage(void) | |
4002 | { | |
b716ce68 | 4003 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4004 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4005 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4006 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4007 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4008 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4009 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4010 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4011 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4012 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4013 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4014 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4015 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4016 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
4017 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
4018 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
4019 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4020 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4021 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4022 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4023 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4024 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4025 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 4026 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
26296c48 | 4027 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
fac6795d DG |
4028 | } |
4029 | ||
4030 | /* | |
26296c48 JG |
4031 | * Take an option from the getopt output and set it in the right variable to be |
4032 | * used later. | |
4033 | * | |
4034 | * Return 0 on success else a negative value. | |
fac6795d | 4035 | */ |
26296c48 | 4036 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4037 | { |
26296c48 | 4038 | int ret = 0; |
fac6795d | 4039 | |
26296c48 JG |
4040 | switch (opt) { |
4041 | case 0: | |
4042 | fprintf(stderr, "option %s", optname); | |
4043 | if (arg) { | |
4044 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4045 | } |
26296c48 JG |
4046 | break; |
4047 | case 'c': | |
4048 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4049 | break; | |
4050 | case 'a': | |
4051 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4052 | break; | |
4053 | case 'd': | |
4054 | opt_daemon = 1; | |
4055 | break; | |
4056 | case 'g': | |
4057 | tracing_group_name = strdup(arg); | |
4058 | break; | |
4059 | case 'h': | |
4060 | usage(); | |
4061 | exit(EXIT_FAILURE); | |
4062 | case 'V': | |
4063 | fprintf(stdout, "%s\n", VERSION); | |
4064 | exit(EXIT_SUCCESS); | |
4065 | case 'S': | |
4066 | opt_sig_parent = 1; | |
4067 | break; | |
4068 | case 'E': | |
4069 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4070 | break; | |
4071 | case 'C': | |
4072 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4073 | break; | |
4074 | case 'F': | |
4075 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4076 | break; | |
4077 | case 'D': | |
4078 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4079 | break; | |
4080 | case 'H': | |
4081 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4082 | break; | |
4083 | case 'G': | |
4084 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4085 | break; | |
4086 | case 'N': | |
4087 | opt_no_kernel = 1; | |
4088 | break; | |
4089 | case 'q': | |
4090 | lttng_opt_quiet = 1; | |
4091 | break; | |
4092 | case 'v': | |
4093 | /* Verbose level can increase using multiple -v */ | |
4094 | if (arg) { | |
4095 | lttng_opt_verbose = config_parse_value(arg); | |
4096 | } else { | |
97e19046 | 4097 | lttng_opt_verbose += 1; |
26296c48 JG |
4098 | } |
4099 | break; | |
4100 | case 'Z': | |
4101 | if (arg) { | |
4102 | opt_verbose_consumer = config_parse_value(arg); | |
4103 | } else { | |
3bd1e081 | 4104 | opt_verbose_consumer += 1; |
26296c48 JG |
4105 | } |
4106 | break; | |
4107 | case 'u': | |
4108 | consumerd32_bin = strdup(arg); | |
4109 | consumerd32_bin_override = 1; | |
4110 | break; | |
4111 | case 'U': | |
4112 | consumerd32_libdir = strdup(arg); | |
4113 | consumerd32_libdir_override = 1; | |
4114 | break; | |
4115 | case 't': | |
4116 | consumerd64_bin = strdup(arg); | |
4117 | consumerd64_bin_override = 1; | |
4118 | break; | |
4119 | case 'T': | |
4120 | consumerd64_libdir = strdup(arg); | |
4121 | consumerd64_libdir_override = 1; | |
4122 | break; | |
4123 | case 'p': | |
4124 | opt_pidfile = strdup(arg); | |
4125 | break; | |
4126 | case 'J': /* JUL TCP port. */ | |
4127 | { | |
4128 | unsigned long v; | |
4d076222 | 4129 | |
26296c48 JG |
4130 | errno = 0; |
4131 | v = strtoul(arg, NULL, 0); | |
4132 | if (errno != 0 || !isdigit(arg[0])) { | |
4133 | ERR("Wrong value in --jul-tcp-port parameter: %s", arg); | |
4134 | return -1; | |
4135 | } | |
4136 | if (v == 0 || v >= 65535) { | |
4137 | ERR("Port overflow in --jul-tcp-port parameter: %s", arg); | |
4138 | return -1; | |
4139 | } | |
4140 | jul_tcp_port = (uint32_t) v; | |
4141 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4142 | break; | |
4143 | } | |
4144 | default: | |
4145 | /* Unknown option or other error. | |
4146 | * Error is printed by getopt, just return */ | |
4147 | ret = -1; | |
4148 | } | |
4149 | ||
4150 | return ret; | |
4151 | } | |
4152 | ||
4153 | /* | |
4154 | * config_entry_handler_cb used to handle options read from a config file. | |
4155 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4156 | * return value conventions. | |
4157 | */ | |
4158 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4159 | { | |
4160 | int ret = 0, i; | |
4161 | ||
4162 | if (!entry || !entry->name || !entry->value) { | |
4163 | ret = -EINVAL; | |
4164 | goto end; | |
4165 | } | |
4166 | ||
4167 | /* Check if the option is to be ignored */ | |
4168 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4169 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4170 | goto end; | |
4171 | } | |
4172 | } | |
4173 | ||
4174 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4175 | i++) { | |
4176 | ||
4177 | /* Ignore if not fully matched. */ | |
4178 | if (strcmp(entry->name, long_options[i].name)) { | |
4179 | continue; | |
4180 | } | |
4181 | ||
4182 | /* | |
4183 | * If the option takes no argument on the command line, we have to | |
4184 | * check if the value is "true". We support non-zero numeric values, | |
4185 | * true, on and yes. | |
4186 | */ | |
4187 | if (!long_options[i].has_arg) { | |
4188 | ret = config_parse_value(entry->value); | |
4189 | if (ret <= 0) { | |
4190 | if (ret) { | |
4191 | WARN("Invalid configuration value \"%s\" for option %s", | |
4192 | entry->value, entry->name); | |
4193 | } | |
4194 | /* False, skip boolean config option. */ | |
4195 | goto end; | |
4d076222 | 4196 | } |
26296c48 JG |
4197 | } |
4198 | ||
4199 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4200 | goto end; | |
4201 | } | |
4202 | ||
4203 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4204 | ||
4205 | end: | |
4206 | return ret; | |
4207 | } | |
4208 | ||
4209 | /* | |
4210 | * daemon configuration loading and argument parsing | |
4211 | */ | |
4212 | static int set_options(int argc, char **argv) | |
4213 | { | |
4214 | int ret = 0, c = 0, option_index = 0; | |
4215 | int orig_optopt = optopt, orig_optind = optind; | |
4216 | char *optstring; | |
4217 | const char *config_path = NULL; | |
4218 | ||
4219 | optstring = utils_generate_optstring(long_options, | |
4220 | sizeof(long_options) / sizeof(struct option)); | |
4221 | if (!optstring) { | |
4222 | ret = -ENOMEM; | |
4223 | goto end; | |
4224 | } | |
4225 | ||
4226 | /* Check for the --config option */ | |
4227 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4228 | &option_index)) != -1) { | |
4229 | if (c == '?') { | |
4230 | ret = -EINVAL; | |
4231 | goto end; | |
4232 | } else if (c != 'f') { | |
4233 | /* if not equal to --config option. */ | |
4234 | continue; | |
4235 | } | |
4236 | ||
4237 | config_path = utils_expand_path(optarg); | |
4238 | if (!config_path) { | |
4239 | ERR("Failed to resolve path: %s", optarg); | |
4240 | } | |
4241 | } | |
4242 | ||
4243 | ret = config_get_section_entries(config_path, config_section_name, | |
4244 | config_entry_handler, NULL); | |
4245 | if (ret) { | |
4246 | if (ret > 0) { | |
4247 | ERR("Invalid configuration option at line %i", ret); | |
4248 | ret = -1; | |
4249 | } | |
4250 | goto end; | |
4251 | } | |
4252 | ||
4253 | /* Reset getopt's global state */ | |
4254 | optopt = orig_optopt; | |
4255 | optind = orig_optind; | |
4256 | while (1) { | |
4257 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4258 | if (c == -1) { | |
4d076222 DG |
4259 | break; |
4260 | } | |
26296c48 JG |
4261 | |
4262 | ret = set_option(c, optarg, long_options[option_index].name); | |
4263 | if (ret < 0) { | |
4264 | break; | |
fac6795d DG |
4265 | } |
4266 | } | |
4267 | ||
26296c48 JG |
4268 | end: |
4269 | free(optstring); | |
4270 | return ret; | |
fac6795d DG |
4271 | } |
4272 | ||
4273 | /* | |
d063d709 | 4274 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4275 | * apps_sock - The communication socket for all UST apps. |
4276 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4277 | */ |
cf3af59e | 4278 | static int init_daemon_socket(void) |
fac6795d DG |
4279 | { |
4280 | int ret = 0; | |
4281 | mode_t old_umask; | |
4282 | ||
4283 | old_umask = umask(0); | |
4284 | ||
4285 | /* Create client tool unix socket */ | |
d6f42150 DG |
4286 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4287 | if (client_sock < 0) { | |
4288 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4289 | ret = -1; |
4290 | goto end; | |
4291 | } | |
4292 | ||
b662582b DG |
4293 | /* Set the cloexec flag */ |
4294 | ret = utils_set_fd_cloexec(client_sock); | |
4295 | if (ret < 0) { | |
4296 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4297 | "Continuing but note that the consumer daemon will have a " | |
4298 | "reference to this socket on exec()", client_sock); | |
4299 | } | |
4300 | ||
fac6795d DG |
4301 | /* File permission MUST be 660 */ |
4302 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4303 | if (ret < 0) { | |
d6f42150 | 4304 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4305 | PERROR("chmod"); |
fac6795d DG |
4306 | goto end; |
4307 | } | |
4308 | ||
4309 | /* Create the application unix socket */ | |
d6f42150 DG |
4310 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4311 | if (apps_sock < 0) { | |
4312 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4313 | ret = -1; |
4314 | goto end; | |
4315 | } | |
4316 | ||
b662582b DG |
4317 | /* Set the cloexec flag */ |
4318 | ret = utils_set_fd_cloexec(apps_sock); | |
4319 | if (ret < 0) { | |
4320 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4321 | "Continuing but note that the consumer daemon will have a " | |
4322 | "reference to this socket on exec()", apps_sock); | |
4323 | } | |
4324 | ||
d6f42150 | 4325 | /* File permission MUST be 666 */ |
54d01ffb DG |
4326 | ret = chmod(apps_unix_sock_path, |
4327 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4328 | if (ret < 0) { |
d6f42150 | 4329 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4330 | PERROR("chmod"); |
fac6795d DG |
4331 | goto end; |
4332 | } | |
4333 | ||
b662582b DG |
4334 | DBG3("Session daemon client socket %d and application socket %d created", |
4335 | client_sock, apps_sock); | |
4336 | ||
fac6795d DG |
4337 | end: |
4338 | umask(old_umask); | |
4339 | return ret; | |
4340 | } | |
4341 | ||
4342 | /* | |
54d01ffb DG |
4343 | * Check if the global socket is available, and if a daemon is answering at the |
4344 | * other side. If yes, error is returned. | |
fac6795d | 4345 | */ |
cf3af59e | 4346 | static int check_existing_daemon(void) |
fac6795d | 4347 | { |
7d8234d9 | 4348 | /* Is there anybody out there ? */ |
099e26bd | 4349 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4350 | return -EEXIST; |
099e26bd | 4351 | } |
b09c7c76 DG |
4352 | |
4353 | return 0; | |
fac6795d DG |
4354 | } |
4355 | ||
fac6795d | 4356 | /* |
d063d709 | 4357 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4358 | * |
d063d709 | 4359 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4360 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4361 | */ |
be040666 | 4362 | static int set_permissions(char *rundir) |
fac6795d DG |
4363 | { |
4364 | int ret; | |
996b65c8 | 4365 | gid_t gid; |
fac6795d | 4366 | |
6c71277b | 4367 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4368 | |
d6f42150 | 4369 | /* Set lttng run dir */ |
be040666 | 4370 | ret = chown(rundir, 0, gid); |
d6f42150 | 4371 | if (ret < 0) { |
be040666 | 4372 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4373 | PERROR("chown"); |
d6f42150 DG |
4374 | } |
4375 | ||
6c71277b MD |
4376 | /* |
4377 | * Ensure all applications and tracing group can search the run | |
4378 | * dir. Allow everyone to read the directory, since it does not | |
4379 | * buy us anything to hide its content. | |
4380 | */ | |
4381 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4382 | if (ret < 0) { |
4383 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4384 | PERROR("chmod"); |
d1613cf5 JN |
4385 | } |
4386 | ||
d6f42150 | 4387 | /* lttng client socket path */ |
996b65c8 | 4388 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4389 | if (ret < 0) { |
d6f42150 | 4390 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4391 | PERROR("chown"); |
d6f42150 DG |
4392 | } |
4393 | ||
3bd1e081 | 4394 | /* kconsumer error socket path */ |
6c71277b | 4395 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4396 | if (ret < 0) { |
3bd1e081 | 4397 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4398 | PERROR("chown"); |
3bd1e081 MD |
4399 | } |
4400 | ||
7753dea8 | 4401 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4402 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4403 | if (ret < 0) { |
4404 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4405 | PERROR("chown"); |
7753dea8 MD |
4406 | } |
4407 | ||
4408 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4409 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4410 | if (ret < 0) { |
7753dea8 | 4411 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4412 | PERROR("chown"); |
fac6795d DG |
4413 | } |
4414 | ||
d6f42150 | 4415 | DBG("All permissions are set"); |
e07ae692 | 4416 | |
fac6795d DG |
4417 | return ret; |
4418 | } | |
4419 | ||
d6f42150 | 4420 | /* |
d063d709 | 4421 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4422 | */ |
67e40797 | 4423 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4424 | { |
4425 | int ret; | |
4426 | ||
67e40797 DG |
4427 | DBG3("Creating LTTng run directory: %s", rundir); |
4428 | ||
d1613cf5 | 4429 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4430 | if (ret < 0) { |
b1f11e69 | 4431 | if (errno != EEXIST) { |
67e40797 | 4432 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4433 | goto error; |
4434 | } else { | |
4435 | ret = 0; | |
4436 | } | |
d6f42150 DG |
4437 | } |
4438 | ||
4439 | error: | |
4440 | return ret; | |
4441 | } | |
4442 | ||
4443 | /* | |
d063d709 DG |
4444 | * Setup sockets and directory needed by the kconsumerd communication with the |
4445 | * session daemon. | |
d6f42150 | 4446 | */ |
67e40797 DG |
4447 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4448 | const char *rundir) | |
d6f42150 DG |
4449 | { |
4450 | int ret; | |
67e40797 | 4451 | char path[PATH_MAX]; |
d6f42150 | 4452 | |
6c71277b | 4453 | switch (consumer_data->type) { |
7753dea8 | 4454 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4455 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4456 | break; |
4457 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4458 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4459 | break; |
4460 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4461 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4462 | break; |
4463 | default: | |
4464 | ERR("Consumer type unknown"); | |
4465 | ret = -EINVAL; | |
4466 | goto error; | |
d6f42150 DG |
4467 | } |
4468 | ||
67e40797 DG |
4469 | DBG2("Creating consumer directory: %s", path); |
4470 | ||
6c71277b | 4471 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4472 | if (ret < 0) { |
6beb2242 | 4473 | if (errno != EEXIST) { |
f11e84c2 | 4474 | PERROR("mkdir"); |
3bd1e081 | 4475 | ERR("Failed to create %s", path); |
6beb2242 DG |
4476 | goto error; |
4477 | } | |
f11e84c2 | 4478 | ret = -1; |
d6f42150 | 4479 | } |
6c71277b MD |
4480 | if (is_root) { |
4481 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4482 | if (ret < 0) { | |
4483 | ERR("Unable to set group on %s", path); | |
4484 | PERROR("chown"); | |
4485 | goto error; | |
4486 | } | |
4487 | } | |
d6f42150 DG |
4488 | |
4489 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4490 | consumer_data->err_sock = |
4491 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4492 | if (consumer_data->err_sock < 0) { | |
4493 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4494 | ret = -1; |
4495 | goto error; | |
4496 | } | |
4497 | ||
a24f05ab MD |
4498 | /* |
4499 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4500 | * show must go on. | |
4501 | */ | |
4502 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4503 | if (ret < 0) { | |
4504 | PERROR("utils_set_fd_cloexec"); | |
4505 | /* continue anyway */ | |
4506 | } | |
4507 | ||
d6f42150 | 4508 | /* File permission MUST be 660 */ |
3bd1e081 | 4509 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4510 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4511 | if (ret < 0) { |
3bd1e081 | 4512 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4513 | PERROR("chmod"); |
d6f42150 DG |
4514 | goto error; |
4515 | } | |
4516 | ||
4517 | error: | |
4518 | return ret; | |
4519 | } | |
4520 | ||
fac6795d | 4521 | /* |
d063d709 | 4522 | * Signal handler for the daemon |
cf3af59e | 4523 | * |
54d01ffb DG |
4524 | * Simply stop all worker threads, leaving main() return gracefully after |
4525 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4526 | */ |
4527 | static void sighandler(int sig) | |
4528 | { | |
4529 | switch (sig) { | |
cf3af59e | 4530 | case SIGPIPE: |
af87c45a | 4531 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4532 | return; |
4533 | case SIGINT: | |
af87c45a | 4534 | DBG("SIGINT caught"); |
cf3af59e MD |
4535 | stop_threads(); |
4536 | break; | |
4537 | case SIGTERM: | |
af87c45a | 4538 | DBG("SIGTERM caught"); |
cf3af59e MD |
4539 | stop_threads(); |
4540 | break; | |
0bb7724a DG |
4541 | case SIGUSR1: |
4542 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4543 | break; | |
cf3af59e MD |
4544 | default: |
4545 | break; | |
fac6795d | 4546 | } |
fac6795d DG |
4547 | } |
4548 | ||
4549 | /* | |
d063d709 | 4550 | * Setup signal handler for : |
1d4b027a | 4551 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4552 | */ |
1d4b027a | 4553 | static int set_signal_handler(void) |
fac6795d | 4554 | { |
1d4b027a DG |
4555 | int ret = 0; |
4556 | struct sigaction sa; | |
4557 | sigset_t sigset; | |
fac6795d | 4558 | |
1d4b027a | 4559 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4560 | PERROR("sigemptyset"); |
1d4b027a DG |
4561 | return ret; |
4562 | } | |
d6f42150 | 4563 | |
1d4b027a DG |
4564 | sa.sa_handler = sighandler; |
4565 | sa.sa_mask = sigset; | |
4566 | sa.sa_flags = 0; | |
4567 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4568 | PERROR("sigaction"); |
1d4b027a | 4569 | return ret; |
d6f42150 DG |
4570 | } |
4571 | ||
1d4b027a | 4572 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4573 | PERROR("sigaction"); |
1d4b027a | 4574 | return ret; |
d6f42150 | 4575 | } |
aaf26714 | 4576 | |
1d4b027a | 4577 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4578 | PERROR("sigaction"); |
1d4b027a | 4579 | return ret; |
8c0faa1d DG |
4580 | } |
4581 | ||
0bb7724a DG |
4582 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4583 | PERROR("sigaction"); | |
4584 | return ret; | |
4585 | } | |
4586 | ||
4587 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4588 | |
4589 | return ret; | |
fac6795d DG |
4590 | } |
4591 | ||
f3ed775e | 4592 | /* |
d063d709 DG |
4593 | * Set open files limit to unlimited. This daemon can open a large number of |
4594 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4595 | */ |
4596 | static void set_ulimit(void) | |
4597 | { | |
4598 | int ret; | |
4599 | struct rlimit lim; | |
4600 | ||
a88df331 | 4601 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4602 | lim.rlim_cur = 65535; |
4603 | lim.rlim_max = 65535; | |
4604 | ||
4605 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4606 | if (ret < 0) { | |
76d7553f | 4607 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4608 | } |
4609 | } | |
4610 | ||
35f90c40 DG |
4611 | /* |
4612 | * Write pidfile using the rundir and opt_pidfile. | |
4613 | */ | |
4614 | static void write_pidfile(void) | |
4615 | { | |
4616 | int ret; | |
4617 | char pidfile_path[PATH_MAX]; | |
4618 | ||
4619 | assert(rundir); | |
4620 | ||
4621 | if (opt_pidfile) { | |
4622 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4623 | } else { | |
4624 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4625 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4626 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4627 | if (ret < 0) { | |
4628 | PERROR("snprintf pidfile path"); | |
4629 | goto error; | |
4630 | } | |
4631 | } | |
4632 | ||
4633 | /* | |
4634 | * Create pid file in rundir. Return value is of no importance. The | |
4635 | * execution will continue even though we are not able to write the file. | |
4636 | */ | |
4637 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4638 | ||
4639 | error: | |
4640 | return; | |
4641 | } | |
4642 | ||
cd9290dd DG |
4643 | /* |
4644 | * Write JUL TCP port using the rundir. | |
4645 | */ | |
4646 | static void write_julport(void) | |
4647 | { | |
4648 | int ret; | |
4649 | char path[PATH_MAX]; | |
4650 | ||
4651 | assert(rundir); | |
4652 | ||
4653 | ret = snprintf(path, sizeof(path), "%s/" | |
4654 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4655 | if (ret < 0) { | |
4656 | PERROR("snprintf julport path"); | |
4657 | goto error; | |
4658 | } | |
4659 | ||
4660 | /* | |
4661 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4662 | * The execution will continue even though we are not able to write the | |
4663 | * file. | |
4664 | */ | |
4665 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4666 | ||
4667 | error: | |
4668 | return; | |
4669 | } | |
4670 | ||
0bb7724a DG |
4671 | /* |
4672 | * Daemonize this process by forking and making the parent wait for the child | |
4673 | * to signal it indicating readiness. Once received, the parent successfully | |
4674 | * quits. | |
4675 | * | |
4676 | * The child process undergoes the same action that daemon(3) does meaning | |
4677 | * setsid, chdir, and dup /dev/null into 0, 1 and 2. | |
4678 | * | |
4679 | * Return 0 on success else -1 on error. | |
4680 | */ | |
4681 | static int daemonize(void) | |
4682 | { | |
4683 | int ret; | |
4684 | pid_t pid; | |
4685 | ||
4686 | /* Get parent pid of this process. */ | |
4687 | child_ppid = getppid(); | |
4688 | ||
4689 | pid = fork(); | |
4690 | if (pid < 0) { | |
4691 | PERROR("fork"); | |
4692 | goto error; | |
4693 | } else if (pid == 0) { | |
4694 | int fd; | |
4695 | pid_t sid; | |
4696 | ||
4697 | /* Child */ | |
4698 | ||
4699 | /* | |
4700 | * Get the newly created parent pid so we can signal that process when | |
4701 | * we are ready to operate. | |
4702 | */ | |
4703 | child_ppid = getppid(); | |
4704 | ||
4705 | sid = setsid(); | |
4706 | if (sid < 0) { | |
4707 | PERROR("setsid"); | |
4708 | goto error; | |
4709 | } | |
4710 | ||
4711 | /* Try to change directory to /. If we can't well at least notify. */ | |
4712 | ret = chdir("/"); | |
4713 | if (ret < 0) { | |
4714 | PERROR("chdir"); | |
4715 | } | |
4716 | ||
4717 | fd = open(_PATH_DEVNULL, O_RDWR, 0); | |
4718 | if (fd < 0) { | |
4719 | PERROR("open %s", _PATH_DEVNULL); | |
4720 | /* Let 0, 1 and 2 open since we can't bind them to /dev/null. */ | |
4721 | } else { | |
4722 | (void) dup2(fd, STDIN_FILENO); | |
4723 | (void) dup2(fd, STDOUT_FILENO); | |
4724 | (void) dup2(fd, STDERR_FILENO); | |
4725 | if (fd > 2) { | |
4726 | ret = close(fd); | |
4727 | if (ret < 0) { | |
4728 | PERROR("close"); | |
4729 | } | |
4730 | } | |
4731 | } | |
4732 | goto end; | |
4733 | } else { | |
4734 | /* Parent */ | |
4735 | ||
4736 | /* | |
4737 | * Waiting for child to notify this parent that it can exit. Note that | |
4738 | * sleep() is interrupted before the 1 second delay as soon as the | |
4739 | * signal is received, so it will not cause visible delay for the | |
4740 | * user. | |
4741 | */ | |
4742 | while (!CMM_LOAD_SHARED(recv_child_signal)) { | |
077df0b3 DG |
4743 | int status; |
4744 | pid_t ret; | |
4745 | ||
4746 | /* | |
4747 | * Check if child exists without blocking. If so, we have to stop | |
4748 | * this parent process and return an error. | |
4749 | */ | |
4750 | ret = waitpid(pid, &status, WNOHANG); | |
4751 | if (ret < 0 || (ret != 0 && WIFEXITED(status))) { | |
4752 | /* The child exited somehow or was not valid. */ | |
4753 | goto error; | |
4754 | } | |
0bb7724a DG |
4755 | sleep(1); |
4756 | } | |
4757 | ||
4758 | /* | |
4759 | * From this point on, the parent can exit and the child is now an | |
4760 | * operationnal session daemon ready to serve clients and applications. | |
4761 | */ | |
4762 | exit(EXIT_SUCCESS); | |
4763 | } | |
4764 | ||
4765 | end: | |
4766 | return 0; | |
4767 | ||
4768 | error: | |
4769 | return -1; | |
4770 | } | |
4771 | ||
fac6795d DG |
4772 | /* |
4773 | * main | |
4774 | */ | |
4775 | int main(int argc, char **argv) | |
4776 | { | |
fac6795d DG |
4777 | int ret = 0; |
4778 | void *status; | |
ae9e45b3 | 4779 | const char *home_path, *env_app_timeout; |
fac6795d | 4780 | |
335a95b7 MD |
4781 | init_kernel_workarounds(); |
4782 | ||
f6a9efaa DG |
4783 | rcu_register_thread(); |
4784 | ||
0bb7724a DG |
4785 | if ((ret = set_signal_handler()) < 0) { |
4786 | goto error; | |
4787 | } | |
4788 | ||
7753dea8 | 4789 | setup_consumerd_path(); |
fb09408a | 4790 | |
12744796 DG |
4791 | page_size = sysconf(_SC_PAGESIZE); |
4792 | if (page_size < 0) { | |
4793 | PERROR("sysconf _SC_PAGESIZE"); | |
4794 | page_size = LONG_MAX; | |
4795 | WARN("Fallback page size to %ld", page_size); | |
4796 | } | |
4797 | ||
26296c48 | 4798 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 4799 | progname = argv[0]; |
26296c48 | 4800 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 4801 | goto error; |
fac6795d DG |
4802 | } |
4803 | ||
4804 | /* Daemonize */ | |
4805 | if (opt_daemon) { | |
ceed52b5 MD |
4806 | int i; |
4807 | ||
0bb7724a | 4808 | ret = daemonize(); |
53094c05 | 4809 | if (ret < 0) { |
cf3af59e | 4810 | goto error; |
53094c05 | 4811 | } |
0bb7724a | 4812 | |
ceed52b5 | 4813 | /* |
0bb7724a DG |
4814 | * We are in the child. Make sure all other file descriptors are |
4815 | * closed, in case we are called with more opened file descriptors than | |
4816 | * the standard ones. | |
ceed52b5 MD |
4817 | */ |
4818 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4819 | (void) close(i); | |
4820 | } | |
4821 | } | |
4822 | ||
4823 | /* Create thread quit pipe */ | |
4824 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4825 | goto error; | |
fac6795d DG |
4826 | } |
4827 | ||
4828 | /* Check if daemon is UID = 0 */ | |
4829 | is_root = !getuid(); | |
4830 | ||
fac6795d | 4831 | if (is_root) { |
990570ed | 4832 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4833 | |
4834 | /* Create global run dir with root access */ | |
4835 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4836 | if (ret < 0) { |
cf3af59e | 4837 | goto error; |
d6f42150 DG |
4838 | } |
4839 | ||
fac6795d | 4840 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4841 | snprintf(apps_unix_sock_path, PATH_MAX, |
4842 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4843 | } |
4844 | ||
4845 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4846 | snprintf(client_unix_sock_path, PATH_MAX, |
4847 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4848 | } | |
0fdd1e2c DG |
4849 | |
4850 | /* Set global SHM for ust */ | |
4851 | if (strlen(wait_shm_path) == 0) { | |
4852 | snprintf(wait_shm_path, PATH_MAX, | |
4853 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4854 | } | |
67e40797 | 4855 | |
44a5e5eb DG |
4856 | if (strlen(health_unix_sock_path) == 0) { |
4857 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4858 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4859 | } | |
4860 | ||
67e40797 DG |
4861 | /* Setup kernel consumerd path */ |
4862 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4863 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4864 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4865 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4866 | |
4867 | DBG2("Kernel consumer err path: %s", | |
4868 | kconsumer_data.err_unix_sock_path); | |
4869 | DBG2("Kernel consumer cmd path: %s", | |
4870 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4871 | } else { |
feb0f3e5 | 4872 | home_path = utils_get_home_dir(); |
b082db07 | 4873 | if (home_path == NULL) { |
273ea72c DG |
4874 | /* TODO: Add --socket PATH option */ |
4875 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4876 | ret = -EPERM; |
4877 | goto error; | |
b082db07 DG |
4878 | } |
4879 | ||
67e40797 DG |
4880 | /* |
4881 | * Create rundir from home path. This will create something like | |
4882 | * $HOME/.lttng | |
4883 | */ | |
990570ed | 4884 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4885 | if (ret < 0) { |
4886 | ret = -ENOMEM; | |
4887 | goto error; | |
4888 | } | |
4889 | ||
4890 | ret = create_lttng_rundir(rundir); | |
4891 | if (ret < 0) { | |
4892 | goto error; | |
4893 | } | |
4894 | ||
fac6795d | 4895 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4896 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4897 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4898 | } |
4899 | ||
4900 | /* Set the cli tool unix socket path */ | |
4901 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4902 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4903 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4904 | } |
0fdd1e2c DG |
4905 | |
4906 | /* Set global SHM for ust */ | |
4907 | if (strlen(wait_shm_path) == 0) { | |
4908 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4909 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4910 | } |
44a5e5eb DG |
4911 | |
4912 | /* Set health check Unix path */ | |
4913 | if (strlen(health_unix_sock_path) == 0) { | |
4914 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4915 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4916 | } | |
fac6795d DG |
4917 | } |
4918 | ||
5c827ce0 DG |
4919 | /* Set consumer initial state */ |
4920 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4921 | ust_consumerd_state = CONSUMER_STOPPED; | |
4922 | ||
847177cd DG |
4923 | DBG("Client socket path %s", client_unix_sock_path); |
4924 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4925 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4926 | DBG("LTTng run directory path: %s", rundir); |
4927 | ||
4928 | /* 32 bits consumerd path setup */ | |
4929 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4930 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4931 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4932 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4933 | |
4934 | DBG2("UST consumer 32 bits err path: %s", | |
4935 | ustconsumer32_data.err_unix_sock_path); | |
4936 | DBG2("UST consumer 32 bits cmd path: %s", | |
4937 | ustconsumer32_data.cmd_unix_sock_path); | |
4938 | ||
4939 | /* 64 bits consumerd path setup */ | |
4940 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4941 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4942 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4943 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4944 | |
4945 | DBG2("UST consumer 64 bits err path: %s", | |
4946 | ustconsumer64_data.err_unix_sock_path); | |
4947 | DBG2("UST consumer 64 bits cmd path: %s", | |
4948 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4949 | |
273ea72c | 4950 | /* |
7d8234d9 | 4951 | * See if daemon already exist. |
fac6795d | 4952 | */ |
7d8234d9 | 4953 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4954 | ERR("Already running daemon.\n"); |
273ea72c | 4955 | /* |
cf3af59e MD |
4956 | * We do not goto exit because we must not cleanup() |
4957 | * because a daemon is already running. | |
ab118b20 | 4958 | */ |
cf3af59e | 4959 | goto error; |
a88df331 DG |
4960 | } |
4961 | ||
1427f9b2 DG |
4962 | /* |
4963 | * Init UST app hash table. Alloc hash table before this point since | |
4964 | * cleanup() can get called after that point. | |
4965 | */ | |
4966 | ust_app_ht_alloc(); | |
4967 | ||
f20baf8e DG |
4968 | /* Initialize JUL domain subsystem. */ |
4969 | if ((ret = jul_init()) < 0) { | |
4970 | /* ENOMEM at this point. */ | |
4971 | goto error; | |
4972 | } | |
4973 | ||
54d01ffb | 4974 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4975 | |
4976 | /* | |
4977 | * These actions must be executed as root. We do that *after* setting up | |
4978 | * the sockets path because we MUST make the check for another daemon using | |
4979 | * those paths *before* trying to set the kernel consumer sockets and init | |
4980 | * kernel tracer. | |
4981 | */ | |
4982 | if (is_root) { | |
67e40797 | 4983 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4984 | if (ret < 0) { |
4985 | goto exit; | |
4986 | } | |
4987 | ||
a88df331 | 4988 | /* Setup kernel tracer */ |
4fba7219 DG |
4989 | if (!opt_no_kernel) { |
4990 | init_kernel_tracer(); | |
4991 | } | |
a88df331 DG |
4992 | |
4993 | /* Set ulimit for open files */ | |
4994 | set_ulimit(); | |
fac6795d | 4995 | } |
4063050c MD |
4996 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4997 | lttng_fd_init(); | |
fac6795d | 4998 | |
67e40797 DG |
4999 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
5000 | if (ret < 0) { | |
5001 | goto exit; | |
5002 | } | |
5003 | ||
5004 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
5005 | if (ret < 0) { | |
5006 | goto exit; | |
5007 | } | |
5008 | ||
d6f42150 | 5009 | /* Setup the needed unix socket */ |
cf3af59e MD |
5010 | if ((ret = init_daemon_socket()) < 0) { |
5011 | goto exit; | |
fac6795d DG |
5012 | } |
5013 | ||
5014 | /* Set credentials to socket */ | |
be040666 | 5015 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 5016 | goto exit; |
fac6795d DG |
5017 | } |
5018 | ||
5b8719f5 DG |
5019 | /* Get parent pid if -S, --sig-parent is specified. */ |
5020 | if (opt_sig_parent) { | |
5021 | ppid = getppid(); | |
5022 | } | |
5023 | ||
7a485870 | 5024 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
5025 | if (is_root && !opt_no_kernel) { |
5026 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
5027 | goto exit; | |
5028 | } | |
7a485870 DG |
5029 | } |
5030 | ||
0b2dc8df MD |
5031 | /* Setup the thread ht_cleanup communication pipe. */ |
5032 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
5033 | goto exit; | |
5034 | } | |
5035 | ||
099e26bd | 5036 | /* Setup the thread apps communication pipe. */ |
ef599319 | 5037 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
5038 | goto exit; |
5039 | } | |
5040 | ||
d0b96690 DG |
5041 | /* Setup the thread apps notify communication pipe. */ |
5042 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
5043 | goto exit; | |
5044 | } | |
5045 | ||
7972aab2 DG |
5046 | /* Initialize global buffer per UID and PID registry. */ |
5047 | buffer_reg_init_uid_registry(); | |
5048 | buffer_reg_init_pid_registry(); | |
5049 | ||
099e26bd DG |
5050 | /* Init UST command queue. */ |
5051 | cds_wfq_init(&ust_cmd_queue.queue); | |
5052 | ||
273ea72c | 5053 | /* |
54d01ffb DG |
5054 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
5055 | * statically declared in session.c | |
273ea72c | 5056 | */ |
54d01ffb | 5057 | session_list_ptr = session_get_list(); |
b5541356 | 5058 | |
5eb91c98 DG |
5059 | /* Set up max poll set size */ |
5060 | lttng_poll_set_max_size(); | |
5061 | ||
2f77fc4b | 5062 | cmd_init(); |
00e2e675 | 5063 | |
ae9e45b3 DG |
5064 | /* Check for the application socket timeout env variable. */ |
5065 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5066 | if (env_app_timeout) { | |
5067 | app_socket_timeout = atoi(env_app_timeout); | |
5068 | } else { | |
5069 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5070 | } | |
5071 | ||
35f90c40 | 5072 | write_pidfile(); |
cd9290dd | 5073 | write_julport(); |
35f90c40 | 5074 | |
554831e7 MD |
5075 | /* Initialize communication library */ |
5076 | lttcomm_init(); | |
d831c249 DG |
5077 | /* This is to get the TCP timeout value. */ |
5078 | lttcomm_inet_init(); | |
554831e7 | 5079 | |
67e05644 DG |
5080 | /* |
5081 | * Initialize the health check subsystem. This call should set the | |
5082 | * appropriate time values. | |
5083 | */ | |
6c71277b | 5084 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5085 | if (!health_sessiond) { |
5086 | PERROR("health_app_create error"); | |
5087 | goto exit_health_sessiond_cleanup; | |
5088 | } | |
67e05644 | 5089 | |
d5b9fd2f | 5090 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5091 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5092 | thread_ht_cleanup, (void *) NULL); | |
5093 | if (ret != 0) { | |
5094 | PERROR("pthread_create ht_cleanup"); | |
5095 | goto exit_ht_cleanup; | |
5096 | } | |
5097 | ||
d5b9fd2f | 5098 | /* Create health-check thread */ |
44a5e5eb DG |
5099 | ret = pthread_create(&health_thread, NULL, |
5100 | thread_manage_health, (void *) NULL); | |
5101 | if (ret != 0) { | |
5102 | PERROR("pthread_create health"); | |
5103 | goto exit_health; | |
5104 | } | |
5105 | ||
cf3af59e | 5106 | /* Create thread to manage the client socket */ |
099e26bd DG |
5107 | ret = pthread_create(&client_thread, NULL, |
5108 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5109 | if (ret != 0) { |
76d7553f | 5110 | PERROR("pthread_create clients"); |
cf3af59e MD |
5111 | goto exit_client; |
5112 | } | |
fac6795d | 5113 | |
099e26bd DG |
5114 | /* Create thread to dispatch registration */ |
5115 | ret = pthread_create(&dispatch_thread, NULL, | |
5116 | thread_dispatch_ust_registration, (void *) NULL); | |
5117 | if (ret != 0) { | |
76d7553f | 5118 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5119 | goto exit_dispatch; |
5120 | } | |
5121 | ||
5122 | /* Create thread to manage application registration. */ | |
5123 | ret = pthread_create(®_apps_thread, NULL, | |
5124 | thread_registration_apps, (void *) NULL); | |
5125 | if (ret != 0) { | |
76d7553f | 5126 | PERROR("pthread_create registration"); |
099e26bd DG |
5127 | goto exit_reg_apps; |
5128 | } | |
5129 | ||
cf3af59e | 5130 | /* Create thread to manage application socket */ |
54d01ffb DG |
5131 | ret = pthread_create(&apps_thread, NULL, |
5132 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5133 | if (ret != 0) { |
d0b96690 DG |
5134 | PERROR("pthread_create apps"); |
5135 | goto exit_apps; | |
5136 | } | |
5137 | ||
5138 | /* Create thread to manage application notify socket */ | |
5139 | ret = pthread_create(&apps_notify_thread, NULL, | |
5140 | ust_thread_manage_notify, (void *) NULL); | |
5141 | if (ret != 0) { | |
76d7553f | 5142 | PERROR("pthread_create apps"); |
9563b0ad | 5143 | goto exit_apps_notify; |
cf3af59e | 5144 | } |
fac6795d | 5145 | |
4d076222 DG |
5146 | /* Create JUL registration thread. */ |
5147 | ret = pthread_create(&jul_reg_thread, NULL, | |
5148 | jul_thread_manage_registration, (void *) NULL); | |
5149 | if (ret != 0) { | |
5150 | PERROR("pthread_create apps"); | |
5151 | goto exit_jul_reg; | |
5152 | } | |
5153 | ||
6620da75 DG |
5154 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5155 | if (is_root && !opt_no_kernel) { | |
5156 | /* Create kernel thread to manage kernel event */ | |
5157 | ret = pthread_create(&kernel_thread, NULL, | |
5158 | thread_manage_kernel, (void *) NULL); | |
5159 | if (ret != 0) { | |
5160 | PERROR("pthread_create kernel"); | |
5161 | goto exit_kernel; | |
5162 | } | |
7a485870 | 5163 | |
6620da75 DG |
5164 | ret = pthread_join(kernel_thread, &status); |
5165 | if (ret != 0) { | |
5166 | PERROR("pthread_join"); | |
5167 | goto error; /* join error, exit without cleanup */ | |
5168 | } | |
fac6795d DG |
5169 | } |
5170 | ||
cf3af59e | 5171 | exit_kernel: |
4d076222 DG |
5172 | ret = pthread_join(jul_reg_thread, &status); |
5173 | if (ret != 0) { | |
5174 | PERROR("pthread_join JUL"); | |
5175 | goto error; /* join error, exit without cleanup */ | |
5176 | } | |
5177 | ||
5178 | exit_jul_reg: | |
9563b0ad DG |
5179 | ret = pthread_join(apps_notify_thread, &status); |
5180 | if (ret != 0) { | |
5181 | PERROR("pthread_join apps notify"); | |
5182 | goto error; /* join error, exit without cleanup */ | |
5183 | } | |
5184 | ||
5185 | exit_apps_notify: | |
cf3af59e MD |
5186 | ret = pthread_join(apps_thread, &status); |
5187 | if (ret != 0) { | |
9563b0ad | 5188 | PERROR("pthread_join apps"); |
cf3af59e MD |
5189 | goto error; /* join error, exit without cleanup */ |
5190 | } | |
fac6795d | 5191 | |
4ccd8c8f | 5192 | |
cf3af59e | 5193 | exit_apps: |
099e26bd DG |
5194 | ret = pthread_join(reg_apps_thread, &status); |
5195 | if (ret != 0) { | |
76d7553f | 5196 | PERROR("pthread_join"); |
099e26bd DG |
5197 | goto error; /* join error, exit without cleanup */ |
5198 | } | |
5199 | ||
5200 | exit_reg_apps: | |
5201 | ret = pthread_join(dispatch_thread, &status); | |
5202 | if (ret != 0) { | |
76d7553f | 5203 | PERROR("pthread_join"); |
099e26bd DG |
5204 | goto error; /* join error, exit without cleanup */ |
5205 | } | |
5206 | ||
5207 | exit_dispatch: | |
cf3af59e MD |
5208 | ret = pthread_join(client_thread, &status); |
5209 | if (ret != 0) { | |
76d7553f | 5210 | PERROR("pthread_join"); |
cf3af59e MD |
5211 | goto error; /* join error, exit without cleanup */ |
5212 | } | |
5213 | ||
3bd1e081 | 5214 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5215 | if (ret != 0) { |
76d7553f | 5216 | PERROR("join_consumer"); |
cf3af59e MD |
5217 | goto error; /* join error, exit without cleanup */ |
5218 | } | |
a88df331 | 5219 | |
06f525de DG |
5220 | ret = join_consumer_thread(&ustconsumer32_data); |
5221 | if (ret != 0) { | |
5222 | PERROR("join_consumer ust32"); | |
5223 | goto error; /* join error, exit without cleanup */ | |
5224 | } | |
5225 | ||
5226 | ret = join_consumer_thread(&ustconsumer64_data); | |
5227 | if (ret != 0) { | |
5228 | PERROR("join_consumer ust64"); | |
5229 | goto error; /* join error, exit without cleanup */ | |
5230 | } | |
5231 | ||
cf3af59e | 5232 | exit_client: |
06f525de DG |
5233 | ret = pthread_join(health_thread, &status); |
5234 | if (ret != 0) { | |
5235 | PERROR("pthread_join health thread"); | |
5236 | goto error; /* join error, exit without cleanup */ | |
5237 | } | |
5238 | ||
44a5e5eb | 5239 | exit_health: |
0b2dc8df MD |
5240 | ret = pthread_join(ht_cleanup_thread, &status); |
5241 | if (ret != 0) { | |
5242 | PERROR("pthread_join ht cleanup thread"); | |
5243 | goto error; /* join error, exit without cleanup */ | |
5244 | } | |
5245 | exit_ht_cleanup: | |
8782cc74 MD |
5246 | health_app_destroy(health_sessiond); |
5247 | exit_health_sessiond_cleanup: | |
a88df331 | 5248 | exit: |
cf3af59e MD |
5249 | /* |
5250 | * cleanup() is called when no other thread is running. | |
5251 | */ | |
f6a9efaa | 5252 | rcu_thread_online(); |
cf3af59e | 5253 | cleanup(); |
f6a9efaa DG |
5254 | rcu_thread_offline(); |
5255 | rcu_unregister_thread(); | |
67e40797 | 5256 | if (!ret) { |
cf3af59e | 5257 | exit(EXIT_SUCCESS); |
67e40797 | 5258 | } |
cf3af59e | 5259 | error: |
5e16da05 | 5260 | exit(EXIT_FAILURE); |
fac6795d | 5261 | } |