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); |
487cf67c | 1413 | |
840cb59c | 1414 | health_code_update(); |
44a5e5eb | 1415 | |
5eb91c98 | 1416 | break; |
0177d773 | 1417 | } |
5eb91c98 DG |
1418 | } else { |
1419 | /* | |
54d01ffb DG |
1420 | * At this point, we know that a registered application made |
1421 | * the event at poll_wait. | |
5eb91c98 DG |
1422 | */ |
1423 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1424 | /* Removing from the poll set */ | |
1425 | ret = lttng_poll_del(&events, pollfd); | |
1426 | if (ret < 0) { | |
1427 | goto error; | |
1428 | } | |
099e26bd | 1429 | |
b9d9b220 | 1430 | /* Socket closed on remote end. */ |
56fff090 | 1431 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1432 | break; |
1433 | } | |
099e26bd | 1434 | } |
44a5e5eb | 1435 | |
840cb59c | 1436 | health_code_update(); |
099e26bd | 1437 | } |
099e26bd DG |
1438 | } |
1439 | ||
139ac872 | 1440 | exit: |
099e26bd | 1441 | error: |
5eb91c98 | 1442 | lttng_poll_clean(&events); |
76d7553f | 1443 | error_poll_create: |
6993eeb3 | 1444 | error_testpoint: |
6620da75 DG |
1445 | utils_close_pipe(apps_cmd_pipe); |
1446 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1447 | ||
1448 | /* | |
1449 | * We don't clean the UST app hash table here since already registered | |
1450 | * applications can still be controlled so let them be until the session | |
1451 | * daemon dies or the applications stop. | |
1452 | */ | |
1453 | ||
139ac872 | 1454 | if (err) { |
840cb59c | 1455 | health_error(); |
139ac872 MD |
1456 | ERR("Health error occurred in %s", __func__); |
1457 | } | |
8782cc74 | 1458 | health_unregister(health_sessiond); |
76d7553f | 1459 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1460 | rcu_thread_offline(); |
1461 | rcu_unregister_thread(); | |
099e26bd DG |
1462 | return NULL; |
1463 | } | |
1464 | ||
d0b96690 | 1465 | /* |
d88aee68 DG |
1466 | * Send a socket to a thread This is called from the dispatch UST registration |
1467 | * thread once all sockets are set for the application. | |
d0b96690 | 1468 | * |
b85dc84c DG |
1469 | * The sock value can be invalid, we don't really care, the thread will handle |
1470 | * it and make the necessary cleanup if so. | |
1471 | * | |
d0b96690 DG |
1472 | * On success, return 0 else a negative value being the errno message of the |
1473 | * write(). | |
1474 | */ | |
d88aee68 | 1475 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1476 | { |
6cd525e8 | 1477 | ssize_t ret; |
d0b96690 | 1478 | |
b85dc84c DG |
1479 | /* |
1480 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1481 | * before calling this function being a shutdown state of the thread. | |
1482 | */ | |
1483 | if (fd < 0) { | |
1484 | ret = -EBADF; | |
1485 | goto error; | |
1486 | } | |
d0b96690 | 1487 | |
6cd525e8 MD |
1488 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1489 | if (ret < sizeof(sock)) { | |
d88aee68 | 1490 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1491 | if (ret < 0) { |
1492 | ret = -errno; | |
1493 | } | |
1494 | goto error; | |
1495 | } | |
1496 | ||
1497 | /* All good. Don't send back the write positive ret value. */ | |
1498 | ret = 0; | |
1499 | error: | |
6cd525e8 | 1500 | return (int) ret; |
d0b96690 DG |
1501 | } |
1502 | ||
f45e313d DG |
1503 | /* |
1504 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1505 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1506 | * notify socket is never received. | |
1507 | */ | |
1508 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1509 | { | |
1510 | int ret, nb_fd = 0, i; | |
1511 | unsigned int fd_added = 0; | |
1512 | struct lttng_poll_event events; | |
1513 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1514 | ||
1515 | assert(wait_queue); | |
1516 | ||
1517 | lttng_poll_init(&events); | |
1518 | ||
1519 | /* Just skip everything for an empty queue. */ | |
1520 | if (!wait_queue->count) { | |
1521 | goto end; | |
1522 | } | |
1523 | ||
1524 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1525 | if (ret < 0) { | |
1526 | goto error_create; | |
1527 | } | |
1528 | ||
1529 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1530 | &wait_queue->head, head) { | |
1531 | assert(wait_node->app); | |
1532 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1533 | LPOLLHUP | LPOLLERR); | |
1534 | if (ret < 0) { | |
1535 | goto error; | |
1536 | } | |
1537 | ||
1538 | fd_added = 1; | |
1539 | } | |
1540 | ||
1541 | if (!fd_added) { | |
1542 | goto end; | |
1543 | } | |
1544 | ||
1545 | /* | |
1546 | * Poll but don't block so we can quickly identify the faulty events and | |
1547 | * clean them afterwards from the wait queue. | |
1548 | */ | |
1549 | ret = lttng_poll_wait(&events, 0); | |
1550 | if (ret < 0) { | |
1551 | goto error; | |
1552 | } | |
1553 | nb_fd = ret; | |
1554 | ||
1555 | for (i = 0; i < nb_fd; i++) { | |
1556 | /* Get faulty FD. */ | |
1557 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1558 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1559 | ||
1560 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1561 | &wait_queue->head, head) { | |
1562 | if (pollfd == wait_node->app->sock && | |
1563 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1564 | cds_list_del(&wait_node->head); | |
1565 | wait_queue->count--; | |
1566 | ust_app_destroy(wait_node->app); | |
1567 | free(wait_node); | |
1568 | break; | |
1569 | } | |
1570 | } | |
1571 | } | |
1572 | ||
1573 | if (nb_fd > 0) { | |
1574 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1575 | } | |
1576 | ||
1577 | end: | |
1578 | lttng_poll_clean(&events); | |
1579 | return; | |
1580 | ||
1581 | error: | |
1582 | lttng_poll_clean(&events); | |
1583 | error_create: | |
1584 | ERR("Unable to sanitize wait queue"); | |
1585 | return; | |
1586 | } | |
1587 | ||
099e26bd DG |
1588 | /* |
1589 | * Dispatch request from the registration threads to the application | |
1590 | * communication thread. | |
1591 | */ | |
1592 | static void *thread_dispatch_ust_registration(void *data) | |
1593 | { | |
12e2b881 | 1594 | int ret, err = -1; |
099e26bd DG |
1595 | struct cds_wfq_node *node; |
1596 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1597 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1598 | struct ust_reg_wait_queue wait_queue = { | |
1599 | .count = 0, | |
1600 | }; | |
d0b96690 | 1601 | |
6c71277b | 1602 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 MD |
1603 | |
1604 | health_code_update(); | |
1605 | ||
f45e313d | 1606 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1607 | |
1608 | DBG("[thread] Dispatch UST command started"); | |
1609 | ||
26c9d55e | 1610 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1611 | health_code_update(); |
1612 | ||
099e26bd DG |
1613 | /* Atomically prepare the queue futex */ |
1614 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1615 | ||
1616 | do { | |
d0b96690 | 1617 | struct ust_app *app = NULL; |
7972aab2 | 1618 | ust_cmd = NULL; |
d0b96690 | 1619 | |
f45e313d DG |
1620 | /* |
1621 | * Make sure we don't have node(s) that have hung up before receiving | |
1622 | * the notify socket. This is to clean the list in order to avoid | |
1623 | * memory leaks from notify socket that are never seen. | |
1624 | */ | |
1625 | sanitize_wait_queue(&wait_queue); | |
1626 | ||
12e2b881 | 1627 | health_code_update(); |
099e26bd DG |
1628 | /* Dequeue command for registration */ |
1629 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1630 | if (node == NULL) { | |
00a17c97 | 1631 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1632 | /* Continue thread execution */ |
1633 | break; | |
1634 | } | |
1635 | ||
1636 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1637 | ||
2f50c8a3 DG |
1638 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1639 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1640 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1641 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1642 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1643 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1644 | |
1645 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1646 | wait_node = zmalloc(sizeof(*wait_node)); | |
1647 | if (!wait_node) { | |
1648 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1649 | ret = close(ust_cmd->sock); |
1650 | if (ret < 0) { | |
1651 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1652 | } | |
51dec90d | 1653 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1654 | free(ust_cmd); |
d0b96690 DG |
1655 | goto error; |
1656 | } | |
1657 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1658 | ||
1659 | /* Create application object if socket is CMD. */ | |
1660 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1661 | ust_cmd->sock); | |
1662 | if (!wait_node->app) { | |
1663 | ret = close(ust_cmd->sock); | |
1664 | if (ret < 0) { | |
1665 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1666 | } |
51dec90d | 1667 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1668 | free(wait_node); |
7972aab2 | 1669 | free(ust_cmd); |
d0b96690 DG |
1670 | continue; |
1671 | } | |
1672 | /* | |
1673 | * Add application to the wait queue so we can set the notify | |
1674 | * socket before putting this object in the global ht. | |
1675 | */ | |
f45e313d DG |
1676 | cds_list_add(&wait_node->head, &wait_queue.head); |
1677 | wait_queue.count++; | |
d0b96690 | 1678 | |
7972aab2 | 1679 | free(ust_cmd); |
d0b96690 DG |
1680 | /* |
1681 | * We have to continue here since we don't have the notify | |
1682 | * socket and the application MUST be added to the hash table | |
1683 | * only at that moment. | |
1684 | */ | |
1685 | continue; | |
1686 | } else { | |
1687 | /* | |
1688 | * Look for the application in the local wait queue and set the | |
1689 | * notify socket if found. | |
1690 | */ | |
d88aee68 | 1691 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1692 | &wait_queue.head, head) { |
12e2b881 | 1693 | health_code_update(); |
d0b96690 DG |
1694 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1695 | wait_node->app->notify_sock = ust_cmd->sock; | |
1696 | cds_list_del(&wait_node->head); | |
f45e313d | 1697 | wait_queue.count--; |
d0b96690 DG |
1698 | app = wait_node->app; |
1699 | free(wait_node); | |
1700 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1701 | break; | |
1702 | } | |
1703 | } | |
020d7f60 DG |
1704 | |
1705 | /* | |
1706 | * With no application at this stage the received socket is | |
1707 | * basically useless so close it before we free the cmd data | |
1708 | * structure for good. | |
1709 | */ | |
1710 | if (!app) { | |
1711 | ret = close(ust_cmd->sock); | |
1712 | if (ret < 0) { | |
1713 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1714 | } | |
51dec90d | 1715 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1716 | } |
7972aab2 | 1717 | free(ust_cmd); |
d0b96690 DG |
1718 | } |
1719 | ||
1720 | if (app) { | |
d0b96690 DG |
1721 | /* |
1722 | * @session_lock_list | |
1723 | * | |
1724 | * Lock the global session list so from the register up to the | |
1725 | * registration done message, no thread can see the application | |
1726 | * and change its state. | |
1727 | */ | |
1728 | session_lock_list(); | |
1729 | rcu_read_lock(); | |
d88aee68 | 1730 | |
d0b96690 DG |
1731 | /* |
1732 | * Add application to the global hash table. This needs to be | |
1733 | * done before the update to the UST registry can locate the | |
1734 | * application. | |
1735 | */ | |
1736 | ust_app_add(app); | |
d88aee68 DG |
1737 | |
1738 | /* Set app version. This call will print an error if needed. */ | |
1739 | (void) ust_app_version(app); | |
1740 | ||
1741 | /* Send notify socket through the notify pipe. */ | |
1742 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1743 | app->notify_sock); | |
1744 | if (ret < 0) { | |
1745 | rcu_read_unlock(); | |
1746 | session_unlock_list(); | |
b85dc84c DG |
1747 | /* |
1748 | * No notify thread, stop the UST tracing. However, this is | |
1749 | * not an internal error of the this thread thus setting | |
1750 | * the health error code to a normal exit. | |
1751 | */ | |
1752 | err = 0; | |
d88aee68 | 1753 | goto error; |
6620da75 | 1754 | } |
d88aee68 | 1755 | |
d0b96690 DG |
1756 | /* |
1757 | * Update newly registered application with the tracing | |
1758 | * registry info already enabled information. | |
1759 | */ | |
1760 | update_ust_app(app->sock); | |
d88aee68 DG |
1761 | |
1762 | /* | |
1763 | * Don't care about return value. Let the manage apps threads | |
1764 | * handle app unregistration upon socket close. | |
1765 | */ | |
1766 | (void) ust_app_register_done(app->sock); | |
1767 | ||
1768 | /* | |
1769 | * Even if the application socket has been closed, send the app | |
1770 | * to the thread and unregistration will take place at that | |
1771 | * place. | |
1772 | */ | |
1773 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1774 | if (ret < 0) { |
d88aee68 DG |
1775 | rcu_read_unlock(); |
1776 | session_unlock_list(); | |
b85dc84c DG |
1777 | /* |
1778 | * No apps. thread, stop the UST tracing. However, this is | |
1779 | * not an internal error of the this thread thus setting | |
1780 | * the health error code to a normal exit. | |
1781 | */ | |
1782 | err = 0; | |
d88aee68 | 1783 | goto error; |
d0b96690 | 1784 | } |
d88aee68 | 1785 | |
d0b96690 DG |
1786 | rcu_read_unlock(); |
1787 | session_unlock_list(); | |
099e26bd | 1788 | } |
099e26bd DG |
1789 | } while (node != NULL); |
1790 | ||
12e2b881 | 1791 | health_poll_entry(); |
099e26bd DG |
1792 | /* Futex wait on queue. Blocking call on futex() */ |
1793 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1794 | health_poll_exit(); |
099e26bd | 1795 | } |
12e2b881 MD |
1796 | /* Normal exit, no error */ |
1797 | err = 0; | |
099e26bd DG |
1798 | |
1799 | error: | |
d88aee68 DG |
1800 | /* Clean up wait queue. */ |
1801 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1802 | &wait_queue.head, head) { |
d88aee68 | 1803 | cds_list_del(&wait_node->head); |
f45e313d | 1804 | wait_queue.count--; |
d88aee68 DG |
1805 | free(wait_node); |
1806 | } | |
1807 | ||
099e26bd | 1808 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1809 | if (err) { |
1810 | health_error(); | |
1811 | ERR("Health error occurred in %s", __func__); | |
1812 | } | |
8782cc74 | 1813 | health_unregister(health_sessiond); |
099e26bd DG |
1814 | return NULL; |
1815 | } | |
1816 | ||
1817 | /* | |
1818 | * This thread manage application registration. | |
1819 | */ | |
1820 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1821 | { |
139ac872 | 1822 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1823 | uint32_t revents, nb_fd; |
1824 | struct lttng_poll_event events; | |
099e26bd DG |
1825 | /* |
1826 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1827 | * freed in the manage apps thread. | |
1828 | */ | |
1829 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1830 | |
099e26bd | 1831 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1832 | |
6c71277b | 1833 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1834 | |
6993eeb3 CB |
1835 | if (testpoint(thread_registration_apps)) { |
1836 | goto error_testpoint; | |
1837 | } | |
8ac94142 | 1838 | |
1d4b027a DG |
1839 | ret = lttcomm_listen_unix_sock(apps_sock); |
1840 | if (ret < 0) { | |
76d7553f | 1841 | goto error_listen; |
1d4b027a DG |
1842 | } |
1843 | ||
5eb91c98 DG |
1844 | /* |
1845 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1846 | * more will be added to this poll set. | |
1847 | */ | |
d0b96690 | 1848 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1849 | if (ret < 0) { |
76d7553f | 1850 | goto error_create_poll; |
5eb91c98 | 1851 | } |
273ea72c | 1852 | |
5eb91c98 DG |
1853 | /* Add the application registration socket */ |
1854 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1855 | if (ret < 0) { | |
76d7553f | 1856 | goto error_poll_add; |
5eb91c98 | 1857 | } |
273ea72c | 1858 | |
1d4b027a | 1859 | /* Notify all applications to register */ |
0fdd1e2c DG |
1860 | ret = notify_ust_apps(1); |
1861 | if (ret < 0) { | |
1862 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1863 | "Execution continues but there might be problem for already\n" |
1864 | "running applications that wishes to register."); | |
0fdd1e2c | 1865 | } |
1d4b027a DG |
1866 | |
1867 | while (1) { | |
1868 | DBG("Accepting application registration"); | |
273ea72c DG |
1869 | |
1870 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1871 | restart: |
a78af745 | 1872 | health_poll_entry(); |
5eb91c98 | 1873 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1874 | health_poll_exit(); |
273ea72c | 1875 | if (ret < 0) { |
88f2b785 MD |
1876 | /* |
1877 | * Restart interrupted system call. | |
1878 | */ | |
1879 | if (errno == EINTR) { | |
1880 | goto restart; | |
1881 | } | |
273ea72c DG |
1882 | goto error; |
1883 | } | |
1884 | ||
0d9c5d77 DG |
1885 | nb_fd = ret; |
1886 | ||
5eb91c98 | 1887 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1888 | health_code_update(); |
139ac872 | 1889 | |
5eb91c98 DG |
1890 | /* Fetch once the poll data */ |
1891 | revents = LTTNG_POLL_GETEV(&events, i); | |
1892 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1893 | |
5eb91c98 | 1894 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1895 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1896 | if (ret) { |
139ac872 MD |
1897 | err = 0; |
1898 | goto exit; | |
90014c57 | 1899 | } |
1d4b027a | 1900 | |
5eb91c98 DG |
1901 | /* Event on the registration socket */ |
1902 | if (pollfd == apps_sock) { | |
1903 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1904 | ERR("Register apps socket poll error"); | |
1905 | goto error; | |
1906 | } else if (revents & LPOLLIN) { | |
1907 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1908 | if (sock < 0) { | |
1909 | goto error; | |
1910 | } | |
099e26bd | 1911 | |
16c5c8fa DG |
1912 | /* |
1913 | * Set socket timeout for both receiving and ending. | |
1914 | * app_socket_timeout is in seconds, whereas | |
1915 | * lttcomm_setsockopt_rcv_timeout and | |
1916 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1917 | * parameter. | |
1918 | */ | |
1919 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1920 | app_socket_timeout * 1000); | |
1921 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1922 | app_socket_timeout * 1000); | |
1923 | ||
b662582b DG |
1924 | /* |
1925 | * Set the CLOEXEC flag. Return code is useless because | |
1926 | * either way, the show must go on. | |
1927 | */ | |
1928 | (void) utils_set_fd_cloexec(sock); | |
1929 | ||
5eb91c98 | 1930 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1931 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1932 | if (ust_cmd == NULL) { |
76d7553f | 1933 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1934 | goto error; |
1935 | } | |
1d4b027a | 1936 | |
5eb91c98 DG |
1937 | /* |
1938 | * Using message-based transmissions to ensure we don't | |
1939 | * have to deal with partially received messages. | |
1940 | */ | |
4063050c MD |
1941 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1942 | if (ret < 0) { | |
1943 | ERR("Exhausted file descriptors allowed for applications."); | |
1944 | free(ust_cmd); | |
1945 | ret = close(sock); | |
1946 | if (ret) { | |
1947 | PERROR("close"); | |
1948 | } | |
1949 | sock = -1; | |
1950 | continue; | |
1951 | } | |
d88aee68 | 1952 | |
840cb59c | 1953 | health_code_update(); |
d0b96690 DG |
1954 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1955 | if (ret < 0) { | |
5eb91c98 | 1956 | free(ust_cmd); |
d0b96690 | 1957 | /* Close socket of the application. */ |
76d7553f MD |
1958 | ret = close(sock); |
1959 | if (ret) { | |
1960 | PERROR("close"); | |
1961 | } | |
4063050c | 1962 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1963 | sock = -1; |
5eb91c98 DG |
1964 | continue; |
1965 | } | |
840cb59c | 1966 | health_code_update(); |
099e26bd | 1967 | |
5eb91c98 | 1968 | ust_cmd->sock = sock; |
34a2494f | 1969 | sock = -1; |
099e26bd | 1970 | |
5eb91c98 DG |
1971 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1972 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1973 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1974 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1975 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1976 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1977 | |
5eb91c98 DG |
1978 | /* |
1979 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1980 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1981 | */ |
1982 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1983 | ||
1984 | /* | |
1985 | * Wake the registration queue futex. Implicit memory | |
1986 | * barrier with the exchange in cds_wfq_enqueue. | |
1987 | */ | |
1988 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1989 | } | |
1990 | } | |
90014c57 | 1991 | } |
1d4b027a DG |
1992 | } |
1993 | ||
139ac872 | 1994 | exit: |
1d4b027a | 1995 | error: |
139ac872 | 1996 | if (err) { |
840cb59c | 1997 | health_error(); |
139ac872 MD |
1998 | ERR("Health error occurred in %s", __func__); |
1999 | } | |
139ac872 | 2000 | |
0fdd1e2c DG |
2001 | /* Notify that the registration thread is gone */ |
2002 | notify_ust_apps(0); | |
2003 | ||
a4b35e07 | 2004 | if (apps_sock >= 0) { |
76d7553f MD |
2005 | ret = close(apps_sock); |
2006 | if (ret) { | |
2007 | PERROR("close"); | |
2008 | } | |
a4b35e07 | 2009 | } |
46c3f085 | 2010 | if (sock >= 0) { |
76d7553f MD |
2011 | ret = close(sock); |
2012 | if (ret) { | |
2013 | PERROR("close"); | |
2014 | } | |
4063050c | 2015 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2016 | } |
273ea72c | 2017 | unlink(apps_unix_sock_path); |
0fdd1e2c | 2018 | |
76d7553f | 2019 | error_poll_add: |
5eb91c98 | 2020 | lttng_poll_clean(&events); |
76d7553f MD |
2021 | error_listen: |
2022 | error_create_poll: | |
6993eeb3 | 2023 | error_testpoint: |
76d7553f | 2024 | DBG("UST Registration thread cleanup complete"); |
8782cc74 | 2025 | health_unregister(health_sessiond); |
5eb91c98 | 2026 | |
1d4b027a DG |
2027 | return NULL; |
2028 | } | |
2029 | ||
8c0faa1d | 2030 | /* |
3bd1e081 | 2031 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2032 | * exec or it will fails. |
8c0faa1d | 2033 | */ |
3bd1e081 | 2034 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2035 | { |
a23ec3a7 | 2036 | int ret, clock_ret; |
ee0b0061 DG |
2037 | struct timespec timeout; |
2038 | ||
a23ec3a7 DG |
2039 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
2040 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 2041 | |
a23ec3a7 DG |
2042 | /* Setup pthread condition */ |
2043 | ret = pthread_condattr_init(&consumer_data->condattr); | |
2044 | if (ret != 0) { | |
2045 | errno = ret; | |
2046 | PERROR("pthread_condattr_init consumer data"); | |
2047 | goto error; | |
2048 | } | |
2049 | ||
2050 | /* | |
2051 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2052 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2053 | * for a more details and how we noticed it. | |
2054 | */ | |
2055 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
2056 | if (ret != 0) { | |
2057 | errno = ret; | |
2058 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2059 | goto error; |
2060 | } | |
8c0faa1d | 2061 | |
a23ec3a7 DG |
2062 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
2063 | if (ret != 0) { | |
2064 | errno = ret; | |
2065 | PERROR("pthread_cond_init consumer data"); | |
2066 | goto error; | |
2067 | } | |
2068 | ||
2069 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
2070 | consumer_data); | |
8c0faa1d | 2071 | if (ret != 0) { |
3bd1e081 | 2072 | PERROR("pthread_create consumer"); |
ee0b0061 | 2073 | ret = -1; |
8c0faa1d DG |
2074 | goto error; |
2075 | } | |
2076 | ||
a23ec3a7 DG |
2077 | /* We are about to wait on a pthread condition */ |
2078 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2079 | ||
ee0b0061 | 2080 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2081 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2082 | /* | |
2083 | * Set the timeout for the condition timed wait even if the clock gettime | |
2084 | * call fails since we might loop on that call and we want to avoid to | |
2085 | * increment the timeout too many times. | |
2086 | */ | |
2087 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2088 | ||
2089 | /* | |
2090 | * The following loop COULD be skipped in some conditions so this is why we | |
2091 | * set ret to 0 in order to make sure at least one round of the loop is | |
2092 | * done. | |
2093 | */ | |
2094 | ret = 0; | |
2095 | ||
2096 | /* | |
2097 | * Loop until the condition is reached or when a timeout is reached. Note | |
2098 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2099 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2100 | * possible. This loop does not take any chances and works with both of | |
2101 | * them. | |
2102 | */ | |
2103 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2104 | if (clock_ret < 0) { | |
2105 | PERROR("clock_gettime spawn consumer"); | |
2106 | /* Infinite wait for the consumerd thread to be ready */ | |
2107 | ret = pthread_cond_wait(&consumer_data->cond, | |
2108 | &consumer_data->cond_mutex); | |
2109 | } else { | |
2110 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2111 | &consumer_data->cond_mutex, &timeout); | |
2112 | } | |
ee0b0061 | 2113 | } |
8c0faa1d | 2114 | |
a23ec3a7 DG |
2115 | /* Release the pthread condition */ |
2116 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2117 | ||
2118 | if (ret != 0) { | |
2119 | errno = ret; | |
2120 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
2121 | /* |
2122 | * Call has timed out so we kill the kconsumerd_thread and return | |
2123 | * an error. | |
2124 | */ | |
a23ec3a7 DG |
2125 | ERR("Condition timed out. The consumer thread was never ready." |
2126 | " Killing it"); | |
3bd1e081 | 2127 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 2128 | if (ret < 0) { |
3bd1e081 | 2129 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2130 | } |
2131 | } else { | |
a23ec3a7 | 2132 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
2133 | } |
2134 | goto error; | |
2135 | } | |
2136 | ||
3bd1e081 MD |
2137 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2138 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2139 | ERR("Consumerd did not start"); |
3bd1e081 | 2140 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2141 | goto error; |
2142 | } | |
3bd1e081 | 2143 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2144 | |
8c0faa1d DG |
2145 | return 0; |
2146 | ||
2147 | error: | |
2148 | return ret; | |
2149 | } | |
2150 | ||
d9800920 | 2151 | /* |
3bd1e081 | 2152 | * Join consumer thread |
d9800920 | 2153 | */ |
3bd1e081 | 2154 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2155 | { |
2156 | void *status; | |
cf3af59e | 2157 | |
e8209f6b DG |
2158 | /* Consumer pid must be a real one. */ |
2159 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2160 | int ret; |
3bd1e081 | 2161 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2162 | if (ret) { |
3bd1e081 | 2163 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2164 | return ret; |
2165 | } | |
3bd1e081 | 2166 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2167 | } else { |
2168 | return 0; | |
2169 | } | |
2170 | } | |
2171 | ||
8c0faa1d | 2172 | /* |
3bd1e081 | 2173 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2174 | * |
d063d709 | 2175 | * Return pid if successful else -1. |
8c0faa1d | 2176 | */ |
3bd1e081 | 2177 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2178 | { |
2179 | int ret; | |
2180 | pid_t pid; | |
94c55f17 | 2181 | const char *consumer_to_use; |
53086306 | 2182 | const char *verbosity; |
94c55f17 | 2183 | struct stat st; |
8c0faa1d | 2184 | |
3bd1e081 | 2185 | DBG("Spawning consumerd"); |
c49dc785 | 2186 | |
8c0faa1d DG |
2187 | pid = fork(); |
2188 | if (pid == 0) { | |
2189 | /* | |
3bd1e081 | 2190 | * Exec consumerd. |
8c0faa1d | 2191 | */ |
daee5345 | 2192 | if (opt_verbose_consumer) { |
53086306 DG |
2193 | verbosity = "--verbose"; |
2194 | } else { | |
2195 | verbosity = "--quiet"; | |
2196 | } | |
3bd1e081 MD |
2197 | switch (consumer_data->type) { |
2198 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2199 | /* |
c7704d57 DG |
2200 | * Find out which consumerd to execute. We will first try the |
2201 | * 64-bit path, then the sessiond's installation directory, and | |
2202 | * fallback on the 32-bit one, | |
94c55f17 | 2203 | */ |
63a799e8 AM |
2204 | DBG3("Looking for a kernel consumer at these locations:"); |
2205 | DBG3(" 1) %s", consumerd64_bin); | |
2206 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2207 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2208 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2209 | DBG3("Found location #1"); |
94c55f17 | 2210 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2211 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2212 | DBG3("Found location #2"); |
94c55f17 | 2213 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2214 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2215 | DBG3("Found location #3"); |
eb1e0bd4 | 2216 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2217 | } else { |
63a799e8 | 2218 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2219 | break; |
2220 | } | |
2221 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
2222 | execl(consumer_to_use, | |
2223 | "lttng-consumerd", verbosity, "-k", | |
2224 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2225 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2226 | "--group", tracing_group_name, |
94c55f17 | 2227 | NULL); |
3bd1e081 | 2228 | break; |
7753dea8 MD |
2229 | case LTTNG_CONSUMER64_UST: |
2230 | { | |
b1e0b6b6 | 2231 | char *tmpnew = NULL; |
8f4905da MD |
2232 | |
2233 | if (consumerd64_libdir[0] != '\0') { | |
2234 | char *tmp; | |
2235 | size_t tmplen; | |
2236 | ||
2237 | tmp = getenv("LD_LIBRARY_PATH"); | |
2238 | if (!tmp) { | |
2239 | tmp = ""; | |
2240 | } | |
2241 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2242 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2243 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2244 | if (!tmpnew) { | |
2245 | ret = -ENOMEM; | |
2246 | goto error; | |
2247 | } | |
2248 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2249 | strcat(tmpnew, consumerd64_libdir); | |
2250 | if (tmp[0] != '\0') { | |
2251 | strcat(tmpnew, ":"); | |
2252 | strcat(tmpnew, tmp); | |
2253 | } | |
2254 | ret = putenv(tmpnew); | |
2255 | if (ret) { | |
2256 | ret = -errno; | |
c6f76da9 | 2257 | free(tmpnew); |
8f4905da MD |
2258 | goto error; |
2259 | } | |
2260 | } | |
94c55f17 | 2261 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2262 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2263 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2264 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2265 | "--group", tracing_group_name, |
7753dea8 | 2266 | NULL); |
8f4905da MD |
2267 | if (consumerd64_libdir[0] != '\0') { |
2268 | free(tmpnew); | |
2269 | } | |
2270 | if (ret) { | |
2271 | goto error; | |
2272 | } | |
3bd1e081 | 2273 | break; |
7753dea8 MD |
2274 | } |
2275 | case LTTNG_CONSUMER32_UST: | |
2276 | { | |
937dde8e | 2277 | char *tmpnew = NULL; |
8f4905da MD |
2278 | |
2279 | if (consumerd32_libdir[0] != '\0') { | |
2280 | char *tmp; | |
2281 | size_t tmplen; | |
2282 | ||
2283 | tmp = getenv("LD_LIBRARY_PATH"); | |
2284 | if (!tmp) { | |
2285 | tmp = ""; | |
2286 | } | |
2287 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2288 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2289 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2290 | if (!tmpnew) { | |
2291 | ret = -ENOMEM; | |
2292 | goto error; | |
2293 | } | |
2294 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2295 | strcat(tmpnew, consumerd32_libdir); | |
2296 | if (tmp[0] != '\0') { | |
2297 | strcat(tmpnew, ":"); | |
2298 | strcat(tmpnew, tmp); | |
2299 | } | |
2300 | ret = putenv(tmpnew); | |
2301 | if (ret) { | |
2302 | ret = -errno; | |
c6f76da9 | 2303 | free(tmpnew); |
8f4905da MD |
2304 | goto error; |
2305 | } | |
2306 | } | |
94c55f17 | 2307 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2308 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2309 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2310 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2311 | "--group", tracing_group_name, |
7753dea8 | 2312 | NULL); |
8f4905da MD |
2313 | if (consumerd32_libdir[0] != '\0') { |
2314 | free(tmpnew); | |
2315 | } | |
2316 | if (ret) { | |
2317 | goto error; | |
2318 | } | |
7753dea8 MD |
2319 | break; |
2320 | } | |
3bd1e081 | 2321 | default: |
76d7553f | 2322 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2323 | exit(EXIT_FAILURE); |
2324 | } | |
8c0faa1d | 2325 | if (errno != 0) { |
76d7553f | 2326 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2327 | } |
2328 | exit(EXIT_FAILURE); | |
2329 | } else if (pid > 0) { | |
2330 | ret = pid; | |
8c0faa1d | 2331 | } else { |
76d7553f | 2332 | PERROR("start consumer fork"); |
8c0faa1d | 2333 | ret = -errno; |
8c0faa1d | 2334 | } |
8f4905da | 2335 | error: |
8c0faa1d DG |
2336 | return ret; |
2337 | } | |
2338 | ||
693bd40b | 2339 | /* |
3bd1e081 | 2340 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2341 | */ |
3bd1e081 | 2342 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2343 | { |
c617c0c6 | 2344 | int ret; |
edb8b045 DG |
2345 | |
2346 | /* | |
2347 | * Set the listen() state on the socket since there is a possible race | |
2348 | * between the exec() of the consumer daemon and this call if place in the | |
2349 | * consumer thread. See bug #366 for more details. | |
2350 | */ | |
2351 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2352 | if (ret < 0) { | |
2353 | goto error; | |
2354 | } | |
693bd40b | 2355 | |
3bd1e081 MD |
2356 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2357 | if (consumer_data->pid != 0) { | |
2358 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2359 | goto end; |
2360 | } | |
693bd40b | 2361 | |
3bd1e081 | 2362 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2363 | if (ret < 0) { |
3bd1e081 MD |
2364 | ERR("Spawning consumerd failed"); |
2365 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2366 | goto error; |
693bd40b | 2367 | } |
c49dc785 | 2368 | |
3bd1e081 MD |
2369 | /* Setting up the consumer_data pid */ |
2370 | consumer_data->pid = ret; | |
48842b30 | 2371 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2372 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2373 | |
3bd1e081 MD |
2374 | DBG2("Spawning consumer control thread"); |
2375 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2376 | if (ret < 0) { |
3bd1e081 | 2377 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2378 | goto error; |
2379 | } | |
2380 | ||
c49dc785 | 2381 | end: |
693bd40b DG |
2382 | return 0; |
2383 | ||
2384 | error: | |
331744e3 | 2385 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2386 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2387 | int err; |
2388 | ||
edb8b045 DG |
2389 | err = close(consumer_data->err_sock); |
2390 | if (err < 0) { | |
2391 | PERROR("close consumer data error socket"); | |
2392 | } | |
2393 | } | |
693bd40b DG |
2394 | return ret; |
2395 | } | |
2396 | ||
b73401da | 2397 | /* |
096102bd | 2398 | * Setup necessary data for kernel tracer action. |
b73401da | 2399 | */ |
096102bd | 2400 | static int init_kernel_tracer(void) |
b73401da DG |
2401 | { |
2402 | int ret; | |
b73401da | 2403 | |
096102bd DG |
2404 | /* Modprobe lttng kernel modules */ |
2405 | ret = modprobe_lttng_control(); | |
b73401da | 2406 | if (ret < 0) { |
b73401da DG |
2407 | goto error; |
2408 | } | |
2409 | ||
096102bd DG |
2410 | /* Open debugfs lttng */ |
2411 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2412 | if (kernel_tracer_fd < 0) { | |
2413 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2414 | ret = -1; |
2415 | goto error_open; | |
54d01ffb DG |
2416 | } |
2417 | ||
2f77fc4b DG |
2418 | /* Validate kernel version */ |
2419 | ret = kernel_validate_version(kernel_tracer_fd); | |
2420 | if (ret < 0) { | |
2421 | goto error_version; | |
b551a063 | 2422 | } |
54d01ffb | 2423 | |
2f77fc4b DG |
2424 | ret = modprobe_lttng_data(); |
2425 | if (ret < 0) { | |
2426 | goto error_modules; | |
54d01ffb DG |
2427 | } |
2428 | ||
2f77fc4b DG |
2429 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2430 | return 0; | |
2431 | ||
2432 | error_version: | |
2433 | modprobe_remove_lttng_control(); | |
2434 | ret = close(kernel_tracer_fd); | |
2435 | if (ret) { | |
2436 | PERROR("close"); | |
b551a063 | 2437 | } |
2f77fc4b | 2438 | kernel_tracer_fd = -1; |
f73fabfd | 2439 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2440 | |
2f77fc4b DG |
2441 | error_modules: |
2442 | ret = close(kernel_tracer_fd); | |
2443 | if (ret) { | |
2444 | PERROR("close"); | |
b551a063 | 2445 | } |
54d01ffb | 2446 | |
2f77fc4b DG |
2447 | error_open: |
2448 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2449 | |
2450 | error: | |
2f77fc4b DG |
2451 | WARN("No kernel tracer available"); |
2452 | kernel_tracer_fd = -1; | |
2453 | if (!is_root) { | |
f73fabfd | 2454 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2455 | } else { |
f73fabfd | 2456 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2457 | } |
54d01ffb DG |
2458 | } |
2459 | ||
2f77fc4b | 2460 | |
54d01ffb | 2461 | /* |
2f77fc4b DG |
2462 | * Copy consumer output from the tracing session to the domain session. The |
2463 | * function also applies the right modification on a per domain basis for the | |
2464 | * trace files destination directory. | |
36b588ed MD |
2465 | * |
2466 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2467 | */ |
2f77fc4b | 2468 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2469 | { |
2470 | int ret; | |
2f77fc4b DG |
2471 | const char *dir_name; |
2472 | struct consumer_output *consumer; | |
2473 | ||
2474 | assert(session); | |
2475 | assert(session->consumer); | |
54d01ffb | 2476 | |
b551a063 DG |
2477 | switch (domain) { |
2478 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2479 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2480 | /* |
2481 | * XXX: We should audit the session creation and what this function | |
2482 | * does "extra" in order to avoid a destroy since this function is used | |
2483 | * in the domain session creation (kernel and ust) only. Same for UST | |
2484 | * domain. | |
2485 | */ | |
2486 | if (session->kernel_session->consumer) { | |
2487 | consumer_destroy_output(session->kernel_session->consumer); | |
2488 | } | |
2f77fc4b DG |
2489 | session->kernel_session->consumer = |
2490 | consumer_copy_output(session->consumer); | |
2491 | /* Ease our life a bit for the next part */ | |
2492 | consumer = session->kernel_session->consumer; | |
2493 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2494 | break; |
f20baf8e | 2495 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2496 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2497 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2498 | if (session->ust_session->consumer) { |
2499 | consumer_destroy_output(session->ust_session->consumer); | |
2500 | } | |
2f77fc4b DG |
2501 | session->ust_session->consumer = |
2502 | consumer_copy_output(session->consumer); | |
2503 | /* Ease our life a bit for the next part */ | |
2504 | consumer = session->ust_session->consumer; | |
2505 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2506 | break; |
2507 | default: | |
f73fabfd | 2508 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2509 | goto error; |
2510 | } | |
2511 | ||
2f77fc4b | 2512 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2513 | strncat(consumer->subdir, dir_name, |
2514 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2515 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2516 | ||
f73fabfd | 2517 | ret = LTTNG_OK; |
54d01ffb DG |
2518 | |
2519 | error: | |
2520 | return ret; | |
2521 | } | |
2522 | ||
00e2e675 | 2523 | /* |
2f77fc4b | 2524 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2525 | * |
2526 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2527 | */ |
2f77fc4b DG |
2528 | static int create_ust_session(struct ltt_session *session, |
2529 | struct lttng_domain *domain) | |
00e2e675 DG |
2530 | { |
2531 | int ret; | |
2f77fc4b | 2532 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2533 | |
a4b92340 | 2534 | assert(session); |
2f77fc4b DG |
2535 | assert(domain); |
2536 | assert(session->consumer); | |
a4b92340 | 2537 | |
2f77fc4b | 2538 | switch (domain->type) { |
f20baf8e | 2539 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2540 | case LTTNG_DOMAIN_UST: |
2541 | break; | |
2542 | default: | |
2543 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2544 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2545 | goto error; |
2546 | } | |
2547 | ||
2f77fc4b DG |
2548 | DBG("Creating UST session"); |
2549 | ||
dec56f6c | 2550 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2551 | if (lus == NULL) { |
f73fabfd | 2552 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2553 | goto error; |
2554 | } | |
2555 | ||
2f77fc4b DG |
2556 | lus->uid = session->uid; |
2557 | lus->gid = session->gid; | |
2bba9e53 | 2558 | lus->output_traces = session->output_traces; |
27babd3a | 2559 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2560 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2561 | session->ust_session = lus; |
00e2e675 | 2562 | |
2f77fc4b DG |
2563 | /* Copy session output to the newly created UST session */ |
2564 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2565 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2566 | goto error; |
2567 | } | |
2568 | ||
f73fabfd | 2569 | return LTTNG_OK; |
00e2e675 DG |
2570 | |
2571 | error: | |
2f77fc4b DG |
2572 | free(lus); |
2573 | session->ust_session = NULL; | |
00e2e675 DG |
2574 | return ret; |
2575 | } | |
2576 | ||
2577 | /* | |
2f77fc4b | 2578 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2579 | */ |
2f77fc4b | 2580 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2581 | { |
2582 | int ret; | |
a4b92340 | 2583 | |
2f77fc4b | 2584 | DBG("Creating kernel session"); |
00e2e675 | 2585 | |
2f77fc4b DG |
2586 | ret = kernel_create_session(session, kernel_tracer_fd); |
2587 | if (ret < 0) { | |
f73fabfd | 2588 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2589 | goto error; |
2590 | } | |
2591 | ||
2f77fc4b DG |
2592 | /* Code flow safety */ |
2593 | assert(session->kernel_session); | |
2594 | ||
2595 | /* Copy session output to the newly created Kernel session */ | |
2596 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2597 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2598 | goto error; |
2599 | } | |
2600 | ||
2f77fc4b DG |
2601 | /* Create directory(ies) on local filesystem. */ |
2602 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2603 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2604 | ret = run_as_mkdir_recursive( | |
2605 | session->kernel_session->consumer->dst.trace_path, | |
2606 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2607 | if (ret < 0) { | |
2608 | if (ret != -EEXIST) { | |
2609 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2610 | goto error; |
2611 | } | |
00e2e675 | 2612 | } |
2f77fc4b | 2613 | } |
00e2e675 | 2614 | |
2f77fc4b DG |
2615 | session->kernel_session->uid = session->uid; |
2616 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2617 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2618 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2619 | |
f73fabfd | 2620 | return LTTNG_OK; |
00e2e675 | 2621 | |
2f77fc4b DG |
2622 | error: |
2623 | trace_kernel_destroy_session(session->kernel_session); | |
2624 | session->kernel_session = NULL; | |
2625 | return ret; | |
2626 | } | |
00e2e675 | 2627 | |
2f77fc4b DG |
2628 | /* |
2629 | * Count number of session permitted by uid/gid. | |
2630 | */ | |
2631 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2632 | { | |
2633 | unsigned int i = 0; | |
2634 | struct ltt_session *session; | |
07424f16 | 2635 | |
2f77fc4b DG |
2636 | DBG("Counting number of available session for UID %d GID %d", |
2637 | uid, gid); | |
2638 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2639 | /* |
2f77fc4b | 2640 | * Only list the sessions the user can control. |
00e2e675 | 2641 | */ |
2f77fc4b DG |
2642 | if (!session_access_ok(session, uid, gid)) { |
2643 | continue; | |
2644 | } | |
2645 | i++; | |
a4b92340 | 2646 | } |
2f77fc4b | 2647 | return i; |
00e2e675 DG |
2648 | } |
2649 | ||
54d01ffb DG |
2650 | /* |
2651 | * Process the command requested by the lttng client within the command | |
2652 | * context structure. This function make sure that the return structure (llm) | |
2653 | * is set and ready for transmission before returning. | |
2654 | * | |
2655 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2656 | * |
2657 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2658 | * |
2659 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2660 | */ |
53a80697 MD |
2661 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2662 | int *sock_error) | |
54d01ffb | 2663 | { |
f73fabfd | 2664 | int ret = LTTNG_OK; |
44d3bd01 | 2665 | int need_tracing_session = 1; |
2e09ba09 | 2666 | int need_domain; |
54d01ffb DG |
2667 | |
2668 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2669 | ||
53a80697 MD |
2670 | *sock_error = 0; |
2671 | ||
2e09ba09 MD |
2672 | switch (cmd_ctx->lsm->cmd_type) { |
2673 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2674 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2675 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2676 | case LTTNG_DESTROY_SESSION: |
2677 | case LTTNG_LIST_SESSIONS: | |
2678 | case LTTNG_LIST_DOMAINS: | |
2679 | case LTTNG_START_TRACE: | |
2680 | case LTTNG_STOP_TRACE: | |
6d805429 | 2681 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2682 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2683 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2684 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2685 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2686 | need_domain = 0; |
3aace903 | 2687 | break; |
2e09ba09 MD |
2688 | default: |
2689 | need_domain = 1; | |
2690 | } | |
2691 | ||
2692 | if (opt_no_kernel && need_domain | |
2693 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2694 | if (!is_root) { |
f73fabfd | 2695 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2696 | } else { |
f73fabfd | 2697 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2698 | } |
4fba7219 DG |
2699 | goto error; |
2700 | } | |
2701 | ||
8d3113b2 DG |
2702 | /* Deny register consumer if we already have a spawned consumer. */ |
2703 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2704 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2705 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2706 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2707 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2708 | goto error; |
2709 | } | |
2710 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2711 | } | |
2712 | ||
54d01ffb DG |
2713 | /* |
2714 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2715 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2716 | * command. |
2717 | */ | |
2718 | switch(cmd_ctx->lsm->cmd_type) { | |
2719 | case LTTNG_LIST_SESSIONS: | |
2720 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2721 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2722 | case LTTNG_LIST_DOMAINS: |
2723 | case LTTNG_LIST_CHANNELS: | |
2724 | case LTTNG_LIST_EVENTS: | |
2725 | break; | |
2726 | default: | |
2727 | /* Setup lttng message with no payload */ | |
2728 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2729 | if (ret < 0) { | |
2730 | /* This label does not try to unlock the session */ | |
2731 | goto init_setup_error; | |
2732 | } | |
2733 | } | |
2734 | ||
2735 | /* Commands that DO NOT need a session. */ | |
2736 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2737 | case LTTNG_CREATE_SESSION: |
27babd3a | 2738 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2739 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2740 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2741 | case LTTNG_LIST_SESSIONS: |
2742 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2743 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2744 | need_tracing_session = 0; |
54d01ffb DG |
2745 | break; |
2746 | default: | |
2747 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2748 | /* |
2749 | * We keep the session list lock across _all_ commands | |
2750 | * for now, because the per-session lock does not | |
2751 | * handle teardown properly. | |
2752 | */ | |
74babd95 | 2753 | session_lock_list(); |
54d01ffb DG |
2754 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2755 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2756 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2757 | goto error; |
2758 | } else { | |
2759 | /* Acquire lock for the session */ | |
2760 | session_lock(cmd_ctx->session); | |
2761 | } | |
2762 | break; | |
2763 | } | |
b389abbe | 2764 | |
2e09ba09 MD |
2765 | if (!need_domain) { |
2766 | goto skip_domain; | |
2767 | } | |
a4b92340 | 2768 | |
54d01ffb DG |
2769 | /* |
2770 | * Check domain type for specific "pre-action". | |
2771 | */ | |
2772 | switch (cmd_ctx->lsm->domain.type) { | |
2773 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2774 | if (!is_root) { |
f73fabfd | 2775 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2776 | goto error; |
2777 | } | |
2778 | ||
54d01ffb | 2779 | /* Kernel tracer check */ |
a4b35e07 | 2780 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2781 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2782 | ret = init_kernel_tracer(); |
2783 | if (ret != 0) { | |
54d01ffb DG |
2784 | goto error; |
2785 | } | |
2786 | } | |
5eb91c98 | 2787 | |
5c827ce0 DG |
2788 | /* Consumer is in an ERROR state. Report back to client */ |
2789 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2790 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2791 | goto error; |
2792 | } | |
2793 | ||
54d01ffb | 2794 | /* Need a session for kernel command */ |
44d3bd01 | 2795 | if (need_tracing_session) { |
54d01ffb | 2796 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2797 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2798 | if (ret < 0) { |
f73fabfd | 2799 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2800 | goto error; |
2801 | } | |
b389abbe | 2802 | } |
7d29a247 | 2803 | |
54d01ffb | 2804 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2805 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2806 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2807 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2808 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2809 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2810 | if (ret < 0) { |
f73fabfd | 2811 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2812 | goto error; |
950131af | 2813 | } |
5c827ce0 | 2814 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2815 | } else { |
2816 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2817 | } |
173af62f | 2818 | |
a4b92340 DG |
2819 | /* |
2820 | * The consumer was just spawned so we need to add the socket to | |
2821 | * the consumer output of the session if exist. | |
2822 | */ | |
2823 | ret = consumer_create_socket(&kconsumer_data, | |
2824 | cmd_ctx->session->kernel_session->consumer); | |
2825 | if (ret < 0) { | |
2826 | goto error; | |
173af62f | 2827 | } |
0d0c377a | 2828 | } |
5c827ce0 | 2829 | |
54d01ffb | 2830 | break; |
b9dfb167 | 2831 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2832 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2833 | { |
b51ec5b4 MD |
2834 | if (!ust_app_supported()) { |
2835 | ret = LTTNG_ERR_NO_UST; | |
2836 | goto error; | |
2837 | } | |
5c827ce0 DG |
2838 | /* Consumer is in an ERROR state. Report back to client */ |
2839 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2840 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2841 | goto error; |
2842 | } | |
2843 | ||
44d3bd01 | 2844 | if (need_tracing_session) { |
a4b92340 | 2845 | /* Create UST session if none exist. */ |
f6a9efaa | 2846 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2847 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2848 | &cmd_ctx->lsm->domain); |
f73fabfd | 2849 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2850 | goto error; |
2851 | } | |
2852 | } | |
00e2e675 | 2853 | |
7753dea8 MD |
2854 | /* Start the UST consumer daemons */ |
2855 | /* 64-bit */ | |
2856 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2857 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2858 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2859 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2860 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2861 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2862 | if (ret < 0) { |
f73fabfd | 2863 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2864 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2865 | goto error; |
2866 | } | |
48842b30 | 2867 | |
173af62f | 2868 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2869 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2870 | } else { |
7753dea8 MD |
2871 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2872 | } | |
173af62f DG |
2873 | |
2874 | /* | |
2875 | * Setup socket for consumer 64 bit. No need for atomic access | |
2876 | * since it was set above and can ONLY be set in this thread. | |
2877 | */ | |
a4b92340 DG |
2878 | ret = consumer_create_socket(&ustconsumer64_data, |
2879 | cmd_ctx->session->ust_session->consumer); | |
2880 | if (ret < 0) { | |
2881 | goto error; | |
173af62f DG |
2882 | } |
2883 | ||
7753dea8 | 2884 | /* 32-bit */ |
fc7a59ce | 2885 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2886 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2887 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2888 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2889 | ret = start_consumerd(&ustconsumer32_data); | |
2890 | if (ret < 0) { | |
f73fabfd | 2891 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2892 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2893 | goto error; |
2894 | } | |
5c827ce0 | 2895 | |
173af62f | 2896 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2897 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2898 | } else { |
2899 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2900 | } |
173af62f DG |
2901 | |
2902 | /* | |
2903 | * Setup socket for consumer 64 bit. No need for atomic access | |
2904 | * since it was set above and can ONLY be set in this thread. | |
2905 | */ | |
a4b92340 DG |
2906 | ret = consumer_create_socket(&ustconsumer32_data, |
2907 | cmd_ctx->session->ust_session->consumer); | |
2908 | if (ret < 0) { | |
2909 | goto error; | |
173af62f | 2910 | } |
44d3bd01 DG |
2911 | } |
2912 | break; | |
48842b30 | 2913 | } |
54d01ffb | 2914 | default: |
54d01ffb DG |
2915 | break; |
2916 | } | |
2e09ba09 | 2917 | skip_domain: |
33a2b854 | 2918 | |
5c827ce0 DG |
2919 | /* Validate consumer daemon state when start/stop trace command */ |
2920 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2921 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2922 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 2923 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
2924 | case LTTNG_DOMAIN_UST: |
2925 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2926 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2927 | goto error; |
2928 | } | |
2929 | break; | |
2930 | case LTTNG_DOMAIN_KERNEL: | |
2931 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2932 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2933 | goto error; |
2934 | } | |
2935 | break; | |
2936 | } | |
2937 | } | |
2938 | ||
8e0af1b4 MD |
2939 | /* |
2940 | * Check that the UID or GID match that of the tracing session. | |
2941 | * The root user can interact with all sessions. | |
2942 | */ | |
2943 | if (need_tracing_session) { | |
2944 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2945 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2946 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2947 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2948 | goto error; |
2949 | } | |
2950 | } | |
2951 | ||
ffe60014 DG |
2952 | /* |
2953 | * Send relayd information to consumer as soon as we have a domain and a | |
2954 | * session defined. | |
2955 | */ | |
2956 | if (cmd_ctx->session && need_domain) { | |
2957 | /* | |
2958 | * Setup relayd if not done yet. If the relayd information was already | |
2959 | * sent to the consumer, this call will gracefully return. | |
2960 | */ | |
2961 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2962 | if (ret != LTTNG_OK) { | |
2963 | goto error; | |
2964 | } | |
2965 | } | |
2966 | ||
54d01ffb DG |
2967 | /* Process by command type */ |
2968 | switch (cmd_ctx->lsm->cmd_type) { | |
2969 | case LTTNG_ADD_CONTEXT: | |
2970 | { | |
2971 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2972 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2973 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2974 | break; |
2975 | } | |
2976 | case LTTNG_DISABLE_CHANNEL: | |
2977 | { | |
2978 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2979 | cmd_ctx->lsm->u.disable.channel_name); | |
2980 | break; | |
2981 | } | |
2982 | case LTTNG_DISABLE_EVENT: | |
2983 | { | |
2984 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2985 | cmd_ctx->lsm->u.disable.channel_name, | |
2986 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2987 | break; |
2988 | } | |
54d01ffb DG |
2989 | case LTTNG_DISABLE_ALL_EVENT: |
2990 | { | |
2bdd86d4 | 2991 | DBG("Disabling all events"); |
54d01ffb DG |
2992 | |
2993 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2994 | cmd_ctx->lsm->u.disable.channel_name); | |
2995 | break; | |
2996 | } | |
2997 | case LTTNG_ENABLE_CHANNEL: | |
2998 | { | |
7972aab2 | 2999 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 3000 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
3001 | break; |
3002 | } | |
3003 | case LTTNG_ENABLE_EVENT: | |
3004 | { | |
882ef835 JI |
3005 | struct lttng_event_exclusion *exclusion = NULL; |
3006 | struct lttng_filter_bytecode *bytecode = NULL; | |
3007 | ||
67676bd8 DG |
3008 | /* Handle exclusion events and receive it from the client. */ |
3009 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3010 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3011 | ||
3012 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3013 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3014 | if (!exclusion) { | |
3015 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3016 | goto error; | |
882ef835 | 3017 | } |
882ef835 | 3018 | |
67676bd8 DG |
3019 | DBG("Receiving var len exclusion event list from client ..."); |
3020 | exclusion->count = count; | |
3021 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3022 | count * LTTNG_SYMBOL_NAME_LEN); | |
3023 | if (ret <= 0) { | |
3024 | DBG("Nothing recv() from client var len data... continuing"); | |
3025 | *sock_error = 1; | |
3026 | free(exclusion); | |
3027 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3028 | goto error; | |
3029 | } | |
3030 | } | |
3031 | ||
3032 | /* Handle filter and get bytecode from client. */ | |
3033 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3034 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3035 | ||
3036 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3037 | ret = LTTNG_ERR_FILTER_INVAL; | |
3038 | free(exclusion); | |
3039 | goto error; | |
3040 | } | |
3041 | ||
3042 | bytecode = zmalloc(bytecode_len); | |
3043 | if (!bytecode) { | |
3044 | free(exclusion); | |
3045 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3046 | goto error; | |
882ef835 JI |
3047 | } |
3048 | ||
67676bd8 DG |
3049 | /* Receive var. len. data */ |
3050 | DBG("Receiving var len filter's bytecode from client ..."); | |
3051 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3052 | if (ret <= 0) { | |
3053 | DBG("Nothing recv() from client car len data... continuing"); | |
3054 | *sock_error = 1; | |
3055 | free(bytecode); | |
3056 | free(exclusion); | |
3057 | ret = LTTNG_ERR_FILTER_INVAL; | |
3058 | goto error; | |
3059 | } | |
3060 | ||
3061 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
3062 | free(bytecode); | |
3063 | free(exclusion); | |
3064 | ret = LTTNG_ERR_FILTER_INVAL; | |
3065 | goto error; | |
3066 | } | |
882ef835 | 3067 | } |
67676bd8 DG |
3068 | |
3069 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3070 | cmd_ctx->lsm->u.enable.channel_name, | |
3071 | &cmd_ctx->lsm->u.enable.event, bytecode, exclusion, | |
3072 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3073 | break; |
3074 | } | |
3075 | case LTTNG_ENABLE_ALL_EVENT: | |
3076 | { | |
2bdd86d4 | 3077 | DBG("Enabling all events"); |
54d01ffb | 3078 | |
7972aab2 | 3079 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 3080 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 3081 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
3082 | break; |
3083 | } | |
052da939 | 3084 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3085 | { |
9f19cc17 | 3086 | struct lttng_event *events; |
54d01ffb | 3087 | ssize_t nb_events; |
052da939 | 3088 | |
54d01ffb DG |
3089 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
3090 | if (nb_events < 0) { | |
f73fabfd | 3091 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3092 | ret = -nb_events; |
3093 | goto error; | |
2ef84c95 DG |
3094 | } |
3095 | ||
3096 | /* | |
3097 | * Setup lttng message with payload size set to the event list size in | |
3098 | * bytes and then copy list into the llm payload. | |
3099 | */ | |
052da939 | 3100 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3101 | if (ret < 0) { |
052da939 | 3102 | free(events); |
2ef84c95 DG |
3103 | goto setup_error; |
3104 | } | |
3105 | ||
3106 | /* Copy event list into message payload */ | |
9f19cc17 | 3107 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 3108 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 3109 | |
9f19cc17 | 3110 | free(events); |
2ef84c95 | 3111 | |
f73fabfd | 3112 | ret = LTTNG_OK; |
2ef84c95 DG |
3113 | break; |
3114 | } | |
f37d259d MD |
3115 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3116 | { | |
3117 | struct lttng_event_field *fields; | |
3118 | ssize_t nb_fields; | |
3119 | ||
a4b92340 DG |
3120 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3121 | &fields); | |
f37d259d | 3122 | if (nb_fields < 0) { |
f73fabfd | 3123 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3124 | ret = -nb_fields; |
3125 | goto error; | |
3126 | } | |
3127 | ||
3128 | /* | |
3129 | * Setup lttng message with payload size set to the event list size in | |
3130 | * bytes and then copy list into the llm payload. | |
3131 | */ | |
a4b92340 DG |
3132 | ret = setup_lttng_msg(cmd_ctx, |
3133 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
3134 | if (ret < 0) { |
3135 | free(fields); | |
3136 | goto setup_error; | |
3137 | } | |
3138 | ||
3139 | /* Copy event list into message payload */ | |
3140 | memcpy(cmd_ctx->llm->payload, fields, | |
3141 | sizeof(struct lttng_event_field) * nb_fields); | |
3142 | ||
3143 | free(fields); | |
3144 | ||
f73fabfd | 3145 | ret = LTTNG_OK; |
f37d259d MD |
3146 | break; |
3147 | } | |
00e2e675 DG |
3148 | case LTTNG_SET_CONSUMER_URI: |
3149 | { | |
a4b92340 DG |
3150 | size_t nb_uri, len; |
3151 | struct lttng_uri *uris; | |
3152 | ||
3153 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3154 | len = nb_uri * sizeof(struct lttng_uri); | |
3155 | ||
3156 | if (nb_uri == 0) { | |
f73fabfd | 3157 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3158 | goto error; |
3159 | } | |
3160 | ||
3161 | uris = zmalloc(len); | |
3162 | if (uris == NULL) { | |
f73fabfd | 3163 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3164 | goto error; |
3165 | } | |
3166 | ||
3167 | /* Receive variable len data */ | |
77c7c900 | 3168 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3169 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3170 | if (ret <= 0) { | |
3171 | DBG("No URIs received from client... continuing"); | |
3172 | *sock_error = 1; | |
f73fabfd | 3173 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3174 | free(uris); |
a4b92340 DG |
3175 | goto error; |
3176 | } | |
3177 | ||
00e2e675 | 3178 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3179 | nb_uri, uris); |
f73fabfd | 3180 | if (ret != LTTNG_OK) { |
b1d41407 | 3181 | free(uris); |
a4b92340 DG |
3182 | goto error; |
3183 | } | |
3184 | ||
3185 | /* | |
3186 | * XXX: 0 means that this URI should be applied on the session. Should | |
3187 | * be a DOMAIN enuam. | |
3188 | */ | |
3189 | if (cmd_ctx->lsm->domain.type == 0) { | |
3190 | /* Add the URI for the UST session if a consumer is present. */ | |
3191 | if (cmd_ctx->session->ust_session && | |
3192 | cmd_ctx->session->ust_session->consumer) { | |
3193 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3194 | nb_uri, uris); | |
3195 | } else if (cmd_ctx->session->kernel_session && | |
3196 | cmd_ctx->session->kernel_session->consumer) { | |
3197 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3198 | cmd_ctx->session, nb_uri, uris); | |
3199 | } | |
3200 | } | |
3201 | ||
b1d41407 DG |
3202 | free(uris); |
3203 | ||
00e2e675 DG |
3204 | break; |
3205 | } | |
f3ed775e | 3206 | case LTTNG_START_TRACE: |
8c0faa1d | 3207 | { |
54d01ffb | 3208 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3209 | break; |
3210 | } | |
f3ed775e | 3211 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3212 | { |
54d01ffb | 3213 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3214 | break; |
3215 | } | |
5e16da05 MD |
3216 | case LTTNG_CREATE_SESSION: |
3217 | { | |
a4b92340 DG |
3218 | size_t nb_uri, len; |
3219 | struct lttng_uri *uris = NULL; | |
3220 | ||
3221 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3222 | len = nb_uri * sizeof(struct lttng_uri); | |
3223 | ||
3224 | if (nb_uri > 0) { | |
3225 | uris = zmalloc(len); | |
3226 | if (uris == NULL) { | |
f73fabfd | 3227 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3228 | goto error; |
3229 | } | |
3230 | ||
3231 | /* Receive variable len data */ | |
77c7c900 | 3232 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3233 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3234 | if (ret <= 0) { | |
3235 | DBG("No URIs received from client... continuing"); | |
3236 | *sock_error = 1; | |
f73fabfd | 3237 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3238 | free(uris); |
a4b92340 DG |
3239 | goto error; |
3240 | } | |
3241 | ||
3242 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3243 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3244 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3245 | free(uris); |
a4b92340 DG |
3246 | goto error; |
3247 | } | |
3248 | } | |
3249 | ||
3250 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3251 | &cmd_ctx->creds, 0); |
a4b92340 | 3252 | |
b1d41407 DG |
3253 | free(uris); |
3254 | ||
00e2e675 DG |
3255 | break; |
3256 | } | |
5e16da05 MD |
3257 | case LTTNG_DESTROY_SESSION: |
3258 | { | |
2f77fc4b | 3259 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3260 | |
3261 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3262 | cmd_ctx->session = NULL; |
5461b305 | 3263 | break; |
5e16da05 | 3264 | } |
9f19cc17 | 3265 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3266 | { |
54d01ffb DG |
3267 | ssize_t nb_dom; |
3268 | struct lttng_domain *domains; | |
5461b305 | 3269 | |
54d01ffb DG |
3270 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3271 | if (nb_dom < 0) { | |
f73fabfd | 3272 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3273 | ret = -nb_dom; |
3274 | goto error; | |
ce3d728c | 3275 | } |
520ff687 | 3276 | |
54d01ffb | 3277 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3278 | if (ret < 0) { |
ae9c20bc | 3279 | free(domains); |
5461b305 | 3280 | goto setup_error; |
520ff687 | 3281 | } |
57167058 | 3282 | |
54d01ffb DG |
3283 | /* Copy event list into message payload */ |
3284 | memcpy(cmd_ctx->llm->payload, domains, | |
3285 | nb_dom * sizeof(struct lttng_domain)); | |
3286 | ||
3287 | free(domains); | |
5e16da05 | 3288 | |
f73fabfd | 3289 | ret = LTTNG_OK; |
5e16da05 MD |
3290 | break; |
3291 | } | |
9f19cc17 | 3292 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3293 | { |
6775595e | 3294 | int nb_chan; |
54d01ffb DG |
3295 | struct lttng_channel *channels; |
3296 | ||
b551a063 DG |
3297 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3298 | cmd_ctx->session, &channels); | |
54d01ffb | 3299 | if (nb_chan < 0) { |
f73fabfd | 3300 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3301 | ret = -nb_chan; |
3302 | goto error; | |
5461b305 | 3303 | } |
ca95a216 | 3304 | |
54d01ffb | 3305 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3306 | if (ret < 0) { |
ae9c20bc | 3307 | free(channels); |
5461b305 DG |
3308 | goto setup_error; |
3309 | } | |
9f19cc17 | 3310 | |
54d01ffb DG |
3311 | /* Copy event list into message payload */ |
3312 | memcpy(cmd_ctx->llm->payload, channels, | |
3313 | nb_chan * sizeof(struct lttng_channel)); | |
3314 | ||
3315 | free(channels); | |
9f19cc17 | 3316 | |
f73fabfd | 3317 | ret = LTTNG_OK; |
5461b305 | 3318 | break; |
5e16da05 | 3319 | } |
9f19cc17 | 3320 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3321 | { |
b551a063 | 3322 | ssize_t nb_event; |
684d34d2 | 3323 | struct lttng_event *events = NULL; |
9f19cc17 | 3324 | |
b551a063 | 3325 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3326 | cmd_ctx->lsm->u.list.channel_name, &events); |
3327 | if (nb_event < 0) { | |
f73fabfd | 3328 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3329 | ret = -nb_event; |
3330 | goto error; | |
5461b305 | 3331 | } |
ca95a216 | 3332 | |
54d01ffb | 3333 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3334 | if (ret < 0) { |
ae9c20bc | 3335 | free(events); |
5461b305 DG |
3336 | goto setup_error; |
3337 | } | |
9f19cc17 | 3338 | |
54d01ffb DG |
3339 | /* Copy event list into message payload */ |
3340 | memcpy(cmd_ctx->llm->payload, events, | |
3341 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3342 | |
54d01ffb | 3343 | free(events); |
9f19cc17 | 3344 | |
f73fabfd | 3345 | ret = LTTNG_OK; |
5461b305 | 3346 | break; |
5e16da05 MD |
3347 | } |
3348 | case LTTNG_LIST_SESSIONS: | |
3349 | { | |
8e0af1b4 | 3350 | unsigned int nr_sessions; |
5461b305 | 3351 | |
8e0af1b4 | 3352 | session_lock_list(); |
730389d9 DG |
3353 | nr_sessions = lttng_sessions_count( |
3354 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3355 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3356 | |
8e0af1b4 | 3357 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3358 | if (ret < 0) { |
54d01ffb | 3359 | session_unlock_list(); |
5461b305 | 3360 | goto setup_error; |
e065084a | 3361 | } |
5e16da05 | 3362 | |
6c9cc2ab | 3363 | /* Filled the session array */ |
2f77fc4b | 3364 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3365 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3366 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3367 | |
54d01ffb | 3368 | session_unlock_list(); |
5e16da05 | 3369 | |
f73fabfd | 3370 | ret = LTTNG_OK; |
5e16da05 MD |
3371 | break; |
3372 | } | |
d0254c7c MD |
3373 | case LTTNG_CALIBRATE: |
3374 | { | |
54d01ffb DG |
3375 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3376 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3377 | break; |
3378 | } | |
d9800920 DG |
3379 | case LTTNG_REGISTER_CONSUMER: |
3380 | { | |
2f77fc4b DG |
3381 | struct consumer_data *cdata; |
3382 | ||
3383 | switch (cmd_ctx->lsm->domain.type) { | |
3384 | case LTTNG_DOMAIN_KERNEL: | |
3385 | cdata = &kconsumer_data; | |
3386 | break; | |
3387 | default: | |
f73fabfd | 3388 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3389 | goto error; |
3390 | } | |
3391 | ||
54d01ffb | 3392 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3393 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3394 | break; |
3395 | } | |
6d805429 | 3396 | case LTTNG_DATA_PENDING: |
806e2684 | 3397 | { |
6d805429 | 3398 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3399 | break; |
3400 | } | |
da3c9ec1 DG |
3401 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3402 | { | |
6dc3064a DG |
3403 | struct lttcomm_lttng_output_id reply; |
3404 | ||
3405 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3406 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3407 | if (ret != LTTNG_OK) { | |
3408 | goto error; | |
3409 | } | |
3410 | ||
3411 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3412 | if (ret < 0) { | |
3413 | goto setup_error; | |
3414 | } | |
3415 | ||
3416 | /* Copy output list into message payload */ | |
3417 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3418 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3419 | break; |
3420 | } | |
3421 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3422 | { | |
6dc3064a DG |
3423 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3424 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3425 | break; |
3426 | } | |
3427 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3428 | { | |
6dc3064a DG |
3429 | ssize_t nb_output; |
3430 | struct lttng_snapshot_output *outputs = NULL; | |
3431 | ||
3432 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3433 | if (nb_output < 0) { | |
3434 | ret = -nb_output; | |
3435 | goto error; | |
3436 | } | |
3437 | ||
3438 | ret = setup_lttng_msg(cmd_ctx, | |
3439 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3440 | if (ret < 0) { | |
3441 | free(outputs); | |
3442 | goto setup_error; | |
3443 | } | |
3444 | ||
3445 | if (outputs) { | |
3446 | /* Copy output list into message payload */ | |
3447 | memcpy(cmd_ctx->llm->payload, outputs, | |
3448 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3449 | free(outputs); | |
3450 | } | |
3451 | ||
3452 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3453 | break; |
3454 | } | |
3455 | case LTTNG_SNAPSHOT_RECORD: | |
3456 | { | |
6dc3064a DG |
3457 | ret = cmd_snapshot_record(cmd_ctx->session, |
3458 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3459 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3460 | break; |
3461 | } | |
27babd3a DG |
3462 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3463 | { | |
3464 | size_t nb_uri, len; | |
3465 | struct lttng_uri *uris = NULL; | |
3466 | ||
3467 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3468 | len = nb_uri * sizeof(struct lttng_uri); | |
3469 | ||
3470 | if (nb_uri > 0) { | |
3471 | uris = zmalloc(len); | |
3472 | if (uris == NULL) { | |
3473 | ret = LTTNG_ERR_FATAL; | |
3474 | goto error; | |
3475 | } | |
3476 | ||
3477 | /* Receive variable len data */ | |
3478 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3479 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3480 | if (ret <= 0) { | |
3481 | DBG("No URIs received from client... continuing"); | |
3482 | *sock_error = 1; | |
3483 | ret = LTTNG_ERR_SESSION_FAIL; | |
3484 | free(uris); | |
3485 | goto error; | |
3486 | } | |
3487 | ||
3488 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3489 | DBG("Creating session with ONE network URI is a bad call"); | |
3490 | ret = LTTNG_ERR_SESSION_FAIL; | |
3491 | free(uris); | |
3492 | goto error; | |
3493 | } | |
3494 | } | |
3495 | ||
3496 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3497 | nb_uri, &cmd_ctx->creds); | |
3498 | free(uris); | |
3499 | break; | |
3500 | } | |
ecc48a90 JD |
3501 | case LTTNG_CREATE_SESSION_LIVE: |
3502 | { | |
3503 | size_t nb_uri, len; | |
3504 | struct lttng_uri *uris = NULL; | |
3505 | ||
3506 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3507 | len = nb_uri * sizeof(struct lttng_uri); | |
3508 | ||
3509 | if (nb_uri > 0) { | |
3510 | uris = zmalloc(len); | |
3511 | if (uris == NULL) { | |
3512 | ret = LTTNG_ERR_FATAL; | |
3513 | goto error; | |
3514 | } | |
3515 | ||
3516 | /* Receive variable len data */ | |
3517 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3518 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3519 | if (ret <= 0) { | |
3520 | DBG("No URIs received from client... continuing"); | |
3521 | *sock_error = 1; | |
3522 | ret = LTTNG_ERR_SESSION_FAIL; | |
3523 | free(uris); | |
3524 | goto error; | |
3525 | } | |
3526 | ||
3527 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3528 | DBG("Creating session with ONE network URI is a bad call"); | |
3529 | ret = LTTNG_ERR_SESSION_FAIL; | |
3530 | free(uris); | |
3531 | goto error; | |
3532 | } | |
3533 | } | |
3534 | ||
3535 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3536 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3537 | free(uris); | |
3538 | break; | |
3539 | } | |
5e16da05 | 3540 | default: |
f73fabfd | 3541 | ret = LTTNG_ERR_UND; |
5461b305 | 3542 | break; |
fac6795d DG |
3543 | } |
3544 | ||
5461b305 | 3545 | error: |
5461b305 DG |
3546 | if (cmd_ctx->llm == NULL) { |
3547 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3548 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3549 | goto setup_error; |
3550 | } | |
3551 | } | |
54d01ffb | 3552 | /* Set return code */ |
5461b305 | 3553 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3554 | setup_error: |
b5541356 | 3555 | if (cmd_ctx->session) { |
54d01ffb | 3556 | session_unlock(cmd_ctx->session); |
b5541356 | 3557 | } |
256a5576 MD |
3558 | if (need_tracing_session) { |
3559 | session_unlock_list(); | |
3560 | } | |
54d01ffb | 3561 | init_setup_error: |
8028d920 | 3562 | return ret; |
fac6795d DG |
3563 | } |
3564 | ||
44a5e5eb DG |
3565 | /* |
3566 | * Thread managing health check socket. | |
3567 | */ | |
3568 | static void *thread_manage_health(void *data) | |
3569 | { | |
eb4a2943 | 3570 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3571 | uint32_t revents, nb_fd; |
3572 | struct lttng_poll_event events; | |
0c89d795 MD |
3573 | struct health_comm_msg msg; |
3574 | struct health_comm_reply reply; | |
44a5e5eb DG |
3575 | |
3576 | DBG("[thread] Manage health check started"); | |
3577 | ||
3578 | rcu_register_thread(); | |
3579 | ||
6d737ce4 DG |
3580 | /* We might hit an error path before this is created. */ |
3581 | lttng_poll_init(&events); | |
3cc04881 | 3582 | |
44a5e5eb DG |
3583 | /* Create unix socket */ |
3584 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3585 | if (sock < 0) { | |
3586 | ERR("Unable to create health check Unix socket"); | |
3587 | ret = -1; | |
3588 | goto error; | |
3589 | } | |
3590 | ||
6c71277b MD |
3591 | if (is_root) { |
3592 | /* lttng health client socket path permissions */ | |
3593 | ret = chown(health_unix_sock_path, 0, | |
3594 | utils_get_group_id(tracing_group_name)); | |
3595 | if (ret < 0) { | |
3596 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3597 | PERROR("chown"); | |
3598 | ret = -1; | |
3599 | goto error; | |
3600 | } | |
3601 | ||
3602 | ret = chmod(health_unix_sock_path, | |
3603 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3604 | if (ret < 0) { | |
3605 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3606 | PERROR("chmod"); | |
3607 | ret = -1; | |
3608 | goto error; | |
3609 | } | |
3610 | } | |
3611 | ||
b662582b DG |
3612 | /* |
3613 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3614 | * show must go on. | |
3615 | */ | |
3616 | (void) utils_set_fd_cloexec(sock); | |
3617 | ||
44a5e5eb DG |
3618 | ret = lttcomm_listen_unix_sock(sock); |
3619 | if (ret < 0) { | |
3620 | goto error; | |
3621 | } | |
3622 | ||
3623 | /* | |
3624 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3625 | * more will be added to this poll set. | |
3626 | */ | |
d0b96690 | 3627 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3628 | if (ret < 0) { |
3629 | goto error; | |
3630 | } | |
3631 | ||
3632 | /* Add the application registration socket */ | |
3633 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3634 | if (ret < 0) { | |
3635 | goto error; | |
3636 | } | |
3637 | ||
3638 | while (1) { | |
3639 | DBG("Health check ready"); | |
3640 | ||
44a5e5eb DG |
3641 | /* Inifinite blocking call, waiting for transmission */ |
3642 | restart: | |
3643 | ret = lttng_poll_wait(&events, -1); | |
3644 | if (ret < 0) { | |
3645 | /* | |
3646 | * Restart interrupted system call. | |
3647 | */ | |
3648 | if (errno == EINTR) { | |
3649 | goto restart; | |
3650 | } | |
3651 | goto error; | |
3652 | } | |
3653 | ||
0d9c5d77 DG |
3654 | nb_fd = ret; |
3655 | ||
44a5e5eb DG |
3656 | for (i = 0; i < nb_fd; i++) { |
3657 | /* Fetch once the poll data */ | |
3658 | revents = LTTNG_POLL_GETEV(&events, i); | |
3659 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3660 | ||
3661 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3662 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3663 | if (ret) { |
139ac872 MD |
3664 | err = 0; |
3665 | goto exit; | |
44a5e5eb DG |
3666 | } |
3667 | ||
3668 | /* Event on the registration socket */ | |
3669 | if (pollfd == sock) { | |
3670 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3671 | ERR("Health socket poll error"); | |
3672 | goto error; | |
3673 | } | |
3674 | } | |
3675 | } | |
3676 | ||
3677 | new_sock = lttcomm_accept_unix_sock(sock); | |
3678 | if (new_sock < 0) { | |
3679 | goto error; | |
3680 | } | |
3681 | ||
b662582b DG |
3682 | /* |
3683 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3684 | * show must go on. | |
3685 | */ | |
3686 | (void) utils_set_fd_cloexec(new_sock); | |
3687 | ||
44a5e5eb DG |
3688 | DBG("Receiving data from client for health..."); |
3689 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3690 | if (ret <= 0) { | |
3691 | DBG("Nothing recv() from client... continuing"); | |
3692 | ret = close(new_sock); | |
3693 | if (ret) { | |
3694 | PERROR("close"); | |
3695 | } | |
3696 | new_sock = -1; | |
3697 | continue; | |
3698 | } | |
3699 | ||
3700 | rcu_thread_online(); | |
3701 | ||
6c71277b MD |
3702 | reply.ret_code = 0; |
3703 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { | |
3704 | /* | |
3705 | * health_check_state returns 0 if health is | |
3706 | * bad. | |
3707 | */ | |
3708 | if (!health_check_state(health_sessiond, i)) { | |
3709 | reply.ret_code |= 1ULL << i; | |
3710 | } | |
44a5e5eb DG |
3711 | } |
3712 | ||
6c71277b | 3713 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3714 | |
3715 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3716 | if (ret < 0) { | |
3717 | ERR("Failed to send health data back to client"); | |
3718 | } | |
3719 | ||
3720 | /* End of transmission */ | |
3721 | ret = close(new_sock); | |
3722 | if (ret) { | |
3723 | PERROR("close"); | |
3724 | } | |
3725 | new_sock = -1; | |
3726 | } | |
3727 | ||
139ac872 | 3728 | exit: |
44a5e5eb | 3729 | error: |
139ac872 MD |
3730 | if (err) { |
3731 | ERR("Health error occurred in %s", __func__); | |
3732 | } | |
44a5e5eb DG |
3733 | DBG("Health check thread dying"); |
3734 | unlink(health_unix_sock_path); | |
3735 | if (sock >= 0) { | |
3736 | ret = close(sock); | |
3737 | if (ret) { | |
3738 | PERROR("close"); | |
3739 | } | |
3740 | } | |
44a5e5eb DG |
3741 | |
3742 | lttng_poll_clean(&events); | |
3743 | ||
3744 | rcu_unregister_thread(); | |
3745 | return NULL; | |
3746 | } | |
3747 | ||
1d4b027a | 3748 | /* |
d063d709 DG |
3749 | * This thread manage all clients request using the unix client socket for |
3750 | * communication. | |
1d4b027a DG |
3751 | */ |
3752 | static void *thread_manage_clients(void *data) | |
3753 | { | |
139ac872 | 3754 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3755 | int sock_error; |
5eb91c98 | 3756 | uint32_t revents, nb_fd; |
273ea72c | 3757 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3758 | struct lttng_poll_event events; |
1d4b027a DG |
3759 | |
3760 | DBG("[thread] Manage client started"); | |
3761 | ||
f6a9efaa DG |
3762 | rcu_register_thread(); |
3763 | ||
6c71277b | 3764 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3765 | |
6993eeb3 CB |
3766 | if (testpoint(thread_manage_clients)) { |
3767 | goto error_testpoint; | |
3768 | } | |
3769 | ||
840cb59c | 3770 | health_code_update(); |
44a5e5eb | 3771 | |
1d4b027a DG |
3772 | ret = lttcomm_listen_unix_sock(client_sock); |
3773 | if (ret < 0) { | |
35df2755 | 3774 | goto error_listen; |
1d4b027a DG |
3775 | } |
3776 | ||
5eb91c98 DG |
3777 | /* |
3778 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3779 | * more will be added to this poll set. | |
3780 | */ | |
d0b96690 | 3781 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3782 | if (ret < 0) { |
35df2755 | 3783 | goto error_create_poll; |
5eb91c98 | 3784 | } |
273ea72c | 3785 | |
5eb91c98 DG |
3786 | /* Add the application registration socket */ |
3787 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3788 | if (ret < 0) { | |
3789 | goto error; | |
3790 | } | |
273ea72c | 3791 | |
bbd973c2 DG |
3792 | /* |
3793 | * Notify parent pid that we are ready to accept command for client side. | |
0bb7724a | 3794 | * This ppid is the one from the external process that spawned us. |
1d4b027a DG |
3795 | */ |
3796 | if (opt_sig_parent) { | |
8db8d1dc | 3797 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3798 | } |
3799 | ||
0bb7724a DG |
3800 | /* Notify the parent of the fork() process that we are ready. */ |
3801 | if (opt_daemon) { | |
3802 | kill(child_ppid, SIGUSR1); | |
3803 | } | |
3804 | ||
6993eeb3 CB |
3805 | if (testpoint(thread_manage_clients_before_loop)) { |
3806 | goto error; | |
3807 | } | |
8ac94142 | 3808 | |
840cb59c | 3809 | health_code_update(); |
44a5e5eb | 3810 | |
1d4b027a | 3811 | while (1) { |
1d4b027a | 3812 | DBG("Accepting client command ..."); |
273ea72c DG |
3813 | |
3814 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3815 | restart: |
a78af745 | 3816 | health_poll_entry(); |
5eb91c98 | 3817 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3818 | health_poll_exit(); |
273ea72c | 3819 | if (ret < 0) { |
88f2b785 MD |
3820 | /* |
3821 | * Restart interrupted system call. | |
3822 | */ | |
3823 | if (errno == EINTR) { | |
3824 | goto restart; | |
3825 | } | |
273ea72c DG |
3826 | goto error; |
3827 | } | |
3828 | ||
0d9c5d77 DG |
3829 | nb_fd = ret; |
3830 | ||
5eb91c98 DG |
3831 | for (i = 0; i < nb_fd; i++) { |
3832 | /* Fetch once the poll data */ | |
3833 | revents = LTTNG_POLL_GETEV(&events, i); | |
3834 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3835 | ||
840cb59c | 3836 | health_code_update(); |
44a5e5eb | 3837 | |
5eb91c98 | 3838 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3839 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3840 | if (ret) { |
139ac872 MD |
3841 | err = 0; |
3842 | goto exit; | |
5eb91c98 DG |
3843 | } |
3844 | ||
3845 | /* Event on the registration socket */ | |
3846 | if (pollfd == client_sock) { | |
3847 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3848 | ERR("Client socket poll error"); | |
3849 | goto error; | |
3850 | } | |
3851 | } | |
3852 | } | |
3853 | ||
3854 | DBG("Wait for client response"); | |
3855 | ||
840cb59c | 3856 | health_code_update(); |
44a5e5eb | 3857 | |
5eb91c98 DG |
3858 | sock = lttcomm_accept_unix_sock(client_sock); |
3859 | if (sock < 0) { | |
273ea72c | 3860 | goto error; |
273ea72c DG |
3861 | } |
3862 | ||
b662582b DG |
3863 | /* |
3864 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3865 | * show must go on. | |
3866 | */ | |
3867 | (void) utils_set_fd_cloexec(sock); | |
3868 | ||
be040666 DG |
3869 | /* Set socket option for credentials retrieval */ |
3870 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3871 | if (ret < 0) { | |
3872 | goto error; | |
3873 | } | |
3874 | ||
5eb91c98 | 3875 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3876 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3877 | if (cmd_ctx == NULL) { |
76d7553f | 3878 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3879 | goto error; |
5eb91c98 | 3880 | } |
1d4b027a | 3881 | |
5eb91c98 | 3882 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3883 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3884 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3885 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3886 | goto error; |
3887 | } | |
1d4b027a | 3888 | |
5eb91c98 DG |
3889 | cmd_ctx->llm = NULL; |
3890 | cmd_ctx->session = NULL; | |
1d4b027a | 3891 | |
840cb59c | 3892 | health_code_update(); |
44a5e5eb | 3893 | |
5eb91c98 DG |
3894 | /* |
3895 | * Data is received from the lttng client. The struct | |
3896 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3897 | * the client. | |
3898 | */ | |
3899 | DBG("Receiving data from client ..."); | |
be040666 DG |
3900 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3901 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3902 | if (ret <= 0) { |
3903 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3904 | ret = close(sock); |
3905 | if (ret) { | |
3906 | PERROR("close"); | |
3907 | } | |
3908 | sock = -1; | |
a2c0da86 | 3909 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3910 | continue; |
3911 | } | |
1d4b027a | 3912 | |
840cb59c | 3913 | health_code_update(); |
44a5e5eb | 3914 | |
5eb91c98 DG |
3915 | // TODO: Validate cmd_ctx including sanity check for |
3916 | // security purpose. | |
f7776ea7 | 3917 | |
f6a9efaa | 3918 | rcu_thread_online(); |
5eb91c98 DG |
3919 | /* |
3920 | * This function dispatch the work to the kernel or userspace tracer | |
3921 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3922 | * informations for the client. The command context struct contains | |
3923 | * everything this function may needs. | |
3924 | */ | |
53a80697 | 3925 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3926 | rcu_thread_offline(); |
5eb91c98 | 3927 | if (ret < 0) { |
36134aa1 DG |
3928 | ret = close(sock); |
3929 | if (ret) { | |
3930 | PERROR("close"); | |
53a80697 | 3931 | } |
36134aa1 | 3932 | sock = -1; |
bbd973c2 | 3933 | /* |
5eb91c98 | 3934 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3935 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3936 | * (ENOMEM). Error detected but still accept |
3937 | * command, unless a socket error has been | |
3938 | * detected. | |
bbd973c2 | 3939 | */ |
bbd973c2 | 3940 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3941 | continue; |
3942 | } | |
d6e4fca4 | 3943 | |
840cb59c | 3944 | health_code_update(); |
44a5e5eb | 3945 | |
54d01ffb DG |
3946 | DBG("Sending response (size: %d, retcode: %s)", |
3947 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3948 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3949 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3950 | if (ret < 0) { |
3951 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3952 | } |
1d4b027a | 3953 | |
5eb91c98 | 3954 | /* End of transmission */ |
76d7553f MD |
3955 | ret = close(sock); |
3956 | if (ret) { | |
3957 | PERROR("close"); | |
3958 | } | |
3959 | sock = -1; | |
be040666 DG |
3960 | |
3961 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3962 | |
840cb59c | 3963 | health_code_update(); |
273ea72c DG |
3964 | } |
3965 | ||
139ac872 | 3966 | exit: |
5eb91c98 | 3967 | error: |
35df2755 CB |
3968 | if (sock >= 0) { |
3969 | ret = close(sock); | |
3970 | if (ret) { | |
3971 | PERROR("close"); | |
3972 | } | |
139ac872 | 3973 | } |
44a5e5eb | 3974 | |
35df2755 CB |
3975 | lttng_poll_clean(&events); |
3976 | clean_command_ctx(&cmd_ctx); | |
3977 | ||
3978 | error_listen: | |
3979 | error_create_poll: | |
6993eeb3 | 3980 | error_testpoint: |
273ea72c | 3981 | unlink(client_unix_sock_path); |
76d7553f MD |
3982 | if (client_sock >= 0) { |
3983 | ret = close(client_sock); | |
3984 | if (ret) { | |
3985 | PERROR("close"); | |
3986 | } | |
a4b35e07 | 3987 | } |
35df2755 CB |
3988 | |
3989 | if (err) { | |
840cb59c | 3990 | health_error(); |
35df2755 | 3991 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3992 | } |
273ea72c | 3993 | |
8782cc74 | 3994 | health_unregister(health_sessiond); |
35df2755 CB |
3995 | |
3996 | DBG("Client thread dying"); | |
f6a9efaa DG |
3997 | |
3998 | rcu_unregister_thread(); | |
1d4b027a DG |
3999 | return NULL; |
4000 | } | |
4001 | ||
4002 | ||
fac6795d DG |
4003 | /* |
4004 | * usage function on stderr | |
4005 | */ | |
4006 | static void usage(void) | |
4007 | { | |
b716ce68 | 4008 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
4009 | fprintf(stderr, " -h, --help Display this usage.\n"); |
4010 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
4011 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
4012 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
4013 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
4014 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
4015 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
4016 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
4017 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
4018 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
4019 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
4020 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
4021 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
4022 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
4023 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
4024 | fprintf(stderr, " -V, --version Show version number.\n"); | |
7fe6d2c5 | 4025 | fprintf(stderr, " -S, --sig-parent Send SIGUSR1 to parent pid to notify readiness.\n"); |
d6f42150 DG |
4026 | fprintf(stderr, " -q, --quiet No output at all.\n"); |
4027 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 4028 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 4029 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 4030 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 4031 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
26296c48 | 4032 | fprintf(stderr, " -f --config Load daemon configuration file\n"); |
fac6795d DG |
4033 | } |
4034 | ||
4035 | /* | |
26296c48 JG |
4036 | * Take an option from the getopt output and set it in the right variable to be |
4037 | * used later. | |
4038 | * | |
4039 | * Return 0 on success else a negative value. | |
fac6795d | 4040 | */ |
26296c48 | 4041 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4042 | { |
26296c48 | 4043 | int ret = 0; |
fac6795d | 4044 | |
26296c48 JG |
4045 | switch (opt) { |
4046 | case 0: | |
4047 | fprintf(stderr, "option %s", optname); | |
4048 | if (arg) { | |
4049 | fprintf(stderr, " with arg %s\n", arg); | |
fac6795d | 4050 | } |
26296c48 JG |
4051 | break; |
4052 | case 'c': | |
4053 | snprintf(client_unix_sock_path, PATH_MAX, "%s", arg); | |
4054 | break; | |
4055 | case 'a': | |
4056 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", arg); | |
4057 | break; | |
4058 | case 'd': | |
4059 | opt_daemon = 1; | |
4060 | break; | |
4061 | case 'g': | |
4062 | tracing_group_name = strdup(arg); | |
4063 | break; | |
4064 | case 'h': | |
4065 | usage(); | |
4066 | exit(EXIT_FAILURE); | |
4067 | case 'V': | |
4068 | fprintf(stdout, "%s\n", VERSION); | |
4069 | exit(EXIT_SUCCESS); | |
4070 | case 'S': | |
4071 | opt_sig_parent = 1; | |
4072 | break; | |
4073 | case 'E': | |
4074 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4075 | break; | |
4076 | case 'C': | |
4077 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4078 | break; | |
4079 | case 'F': | |
4080 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4081 | break; | |
4082 | case 'D': | |
4083 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4084 | break; | |
4085 | case 'H': | |
4086 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", arg); | |
4087 | break; | |
4088 | case 'G': | |
4089 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", arg); | |
4090 | break; | |
4091 | case 'N': | |
4092 | opt_no_kernel = 1; | |
4093 | break; | |
4094 | case 'q': | |
4095 | lttng_opt_quiet = 1; | |
4096 | break; | |
4097 | case 'v': | |
4098 | /* Verbose level can increase using multiple -v */ | |
4099 | if (arg) { | |
4100 | lttng_opt_verbose = config_parse_value(arg); | |
4101 | } else { | |
97e19046 | 4102 | lttng_opt_verbose += 1; |
26296c48 JG |
4103 | } |
4104 | break; | |
4105 | case 'Z': | |
4106 | if (arg) { | |
4107 | opt_verbose_consumer = config_parse_value(arg); | |
4108 | } else { | |
3bd1e081 | 4109 | opt_verbose_consumer += 1; |
26296c48 JG |
4110 | } |
4111 | break; | |
4112 | case 'u': | |
4113 | consumerd32_bin = strdup(arg); | |
4114 | consumerd32_bin_override = 1; | |
4115 | break; | |
4116 | case 'U': | |
4117 | consumerd32_libdir = strdup(arg); | |
4118 | consumerd32_libdir_override = 1; | |
4119 | break; | |
4120 | case 't': | |
4121 | consumerd64_bin = strdup(arg); | |
4122 | consumerd64_bin_override = 1; | |
4123 | break; | |
4124 | case 'T': | |
4125 | consumerd64_libdir = strdup(arg); | |
4126 | consumerd64_libdir_override = 1; | |
4127 | break; | |
4128 | case 'p': | |
4129 | opt_pidfile = strdup(arg); | |
4130 | break; | |
4131 | case 'J': /* JUL TCP port. */ | |
4132 | { | |
4133 | unsigned long v; | |
4d076222 | 4134 | |
26296c48 JG |
4135 | errno = 0; |
4136 | v = strtoul(arg, NULL, 0); | |
4137 | if (errno != 0 || !isdigit(arg[0])) { | |
4138 | ERR("Wrong value in --jul-tcp-port parameter: %s", arg); | |
4139 | return -1; | |
4140 | } | |
4141 | if (v == 0 || v >= 65535) { | |
4142 | ERR("Port overflow in --jul-tcp-port parameter: %s", arg); | |
4143 | return -1; | |
4144 | } | |
4145 | jul_tcp_port = (uint32_t) v; | |
4146 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4147 | break; | |
4148 | } | |
4149 | default: | |
4150 | /* Unknown option or other error. | |
4151 | * Error is printed by getopt, just return */ | |
4152 | ret = -1; | |
4153 | } | |
4154 | ||
4155 | return ret; | |
4156 | } | |
4157 | ||
4158 | /* | |
4159 | * config_entry_handler_cb used to handle options read from a config file. | |
4160 | * See config_entry_handler_cb comment in common/config/config.h for the | |
4161 | * return value conventions. | |
4162 | */ | |
4163 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4164 | { | |
4165 | int ret = 0, i; | |
4166 | ||
4167 | if (!entry || !entry->name || !entry->value) { | |
4168 | ret = -EINVAL; | |
4169 | goto end; | |
4170 | } | |
4171 | ||
4172 | /* Check if the option is to be ignored */ | |
4173 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4174 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4175 | goto end; | |
4176 | } | |
4177 | } | |
4178 | ||
4179 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4180 | i++) { | |
4181 | ||
4182 | /* Ignore if not fully matched. */ | |
4183 | if (strcmp(entry->name, long_options[i].name)) { | |
4184 | continue; | |
4185 | } | |
4186 | ||
4187 | /* | |
4188 | * If the option takes no argument on the command line, we have to | |
4189 | * check if the value is "true". We support non-zero numeric values, | |
4190 | * true, on and yes. | |
4191 | */ | |
4192 | if (!long_options[i].has_arg) { | |
4193 | ret = config_parse_value(entry->value); | |
4194 | if (ret <= 0) { | |
4195 | if (ret) { | |
4196 | WARN("Invalid configuration value \"%s\" for option %s", | |
4197 | entry->value, entry->name); | |
4198 | } | |
4199 | /* False, skip boolean config option. */ | |
4200 | goto end; | |
4d076222 | 4201 | } |
26296c48 JG |
4202 | } |
4203 | ||
4204 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4205 | goto end; | |
4206 | } | |
4207 | ||
4208 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4209 | ||
4210 | end: | |
4211 | return ret; | |
4212 | } | |
4213 | ||
4214 | /* | |
4215 | * daemon configuration loading and argument parsing | |
4216 | */ | |
4217 | static int set_options(int argc, char **argv) | |
4218 | { | |
4219 | int ret = 0, c = 0, option_index = 0; | |
4220 | int orig_optopt = optopt, orig_optind = optind; | |
4221 | char *optstring; | |
4222 | const char *config_path = NULL; | |
4223 | ||
4224 | optstring = utils_generate_optstring(long_options, | |
4225 | sizeof(long_options) / sizeof(struct option)); | |
4226 | if (!optstring) { | |
4227 | ret = -ENOMEM; | |
4228 | goto end; | |
4229 | } | |
4230 | ||
4231 | /* Check for the --config option */ | |
4232 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4233 | &option_index)) != -1) { | |
4234 | if (c == '?') { | |
4235 | ret = -EINVAL; | |
4236 | goto end; | |
4237 | } else if (c != 'f') { | |
4238 | /* if not equal to --config option. */ | |
4239 | continue; | |
4240 | } | |
4241 | ||
4242 | config_path = utils_expand_path(optarg); | |
4243 | if (!config_path) { | |
4244 | ERR("Failed to resolve path: %s", optarg); | |
4245 | } | |
4246 | } | |
4247 | ||
4248 | ret = config_get_section_entries(config_path, config_section_name, | |
4249 | config_entry_handler, NULL); | |
4250 | if (ret) { | |
4251 | if (ret > 0) { | |
4252 | ERR("Invalid configuration option at line %i", ret); | |
4253 | ret = -1; | |
4254 | } | |
4255 | goto end; | |
4256 | } | |
4257 | ||
4258 | /* Reset getopt's global state */ | |
4259 | optopt = orig_optopt; | |
4260 | optind = orig_optind; | |
4261 | while (1) { | |
4262 | c = getopt_long(argc, argv, optstring, long_options, &option_index); | |
4263 | if (c == -1) { | |
4d076222 DG |
4264 | break; |
4265 | } | |
26296c48 JG |
4266 | |
4267 | ret = set_option(c, optarg, long_options[option_index].name); | |
4268 | if (ret < 0) { | |
4269 | break; | |
fac6795d DG |
4270 | } |
4271 | } | |
4272 | ||
26296c48 JG |
4273 | end: |
4274 | free(optstring); | |
4275 | return ret; | |
fac6795d DG |
4276 | } |
4277 | ||
4278 | /* | |
d063d709 | 4279 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4280 | * apps_sock - The communication socket for all UST apps. |
4281 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4282 | */ |
cf3af59e | 4283 | static int init_daemon_socket(void) |
fac6795d DG |
4284 | { |
4285 | int ret = 0; | |
4286 | mode_t old_umask; | |
4287 | ||
4288 | old_umask = umask(0); | |
4289 | ||
4290 | /* Create client tool unix socket */ | |
d6f42150 DG |
4291 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4292 | if (client_sock < 0) { | |
4293 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4294 | ret = -1; |
4295 | goto end; | |
4296 | } | |
4297 | ||
b662582b DG |
4298 | /* Set the cloexec flag */ |
4299 | ret = utils_set_fd_cloexec(client_sock); | |
4300 | if (ret < 0) { | |
4301 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4302 | "Continuing but note that the consumer daemon will have a " | |
4303 | "reference to this socket on exec()", client_sock); | |
4304 | } | |
4305 | ||
fac6795d DG |
4306 | /* File permission MUST be 660 */ |
4307 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4308 | if (ret < 0) { | |
d6f42150 | 4309 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4310 | PERROR("chmod"); |
fac6795d DG |
4311 | goto end; |
4312 | } | |
4313 | ||
4314 | /* Create the application unix socket */ | |
d6f42150 DG |
4315 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4316 | if (apps_sock < 0) { | |
4317 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4318 | ret = -1; |
4319 | goto end; | |
4320 | } | |
4321 | ||
b662582b DG |
4322 | /* Set the cloexec flag */ |
4323 | ret = utils_set_fd_cloexec(apps_sock); | |
4324 | if (ret < 0) { | |
4325 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4326 | "Continuing but note that the consumer daemon will have a " | |
4327 | "reference to this socket on exec()", apps_sock); | |
4328 | } | |
4329 | ||
d6f42150 | 4330 | /* File permission MUST be 666 */ |
54d01ffb DG |
4331 | ret = chmod(apps_unix_sock_path, |
4332 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4333 | if (ret < 0) { |
d6f42150 | 4334 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4335 | PERROR("chmod"); |
fac6795d DG |
4336 | goto end; |
4337 | } | |
4338 | ||
b662582b DG |
4339 | DBG3("Session daemon client socket %d and application socket %d created", |
4340 | client_sock, apps_sock); | |
4341 | ||
fac6795d DG |
4342 | end: |
4343 | umask(old_umask); | |
4344 | return ret; | |
4345 | } | |
4346 | ||
4347 | /* | |
54d01ffb DG |
4348 | * Check if the global socket is available, and if a daemon is answering at the |
4349 | * other side. If yes, error is returned. | |
fac6795d | 4350 | */ |
cf3af59e | 4351 | static int check_existing_daemon(void) |
fac6795d | 4352 | { |
7d8234d9 | 4353 | /* Is there anybody out there ? */ |
099e26bd | 4354 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4355 | return -EEXIST; |
099e26bd | 4356 | } |
b09c7c76 DG |
4357 | |
4358 | return 0; | |
fac6795d DG |
4359 | } |
4360 | ||
fac6795d | 4361 | /* |
d063d709 | 4362 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4363 | * |
d063d709 | 4364 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4365 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4366 | */ |
be040666 | 4367 | static int set_permissions(char *rundir) |
fac6795d DG |
4368 | { |
4369 | int ret; | |
996b65c8 | 4370 | gid_t gid; |
fac6795d | 4371 | |
6c71277b | 4372 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4373 | |
d6f42150 | 4374 | /* Set lttng run dir */ |
be040666 | 4375 | ret = chown(rundir, 0, gid); |
d6f42150 | 4376 | if (ret < 0) { |
be040666 | 4377 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4378 | PERROR("chown"); |
d6f42150 DG |
4379 | } |
4380 | ||
6c71277b MD |
4381 | /* |
4382 | * Ensure all applications and tracing group can search the run | |
4383 | * dir. Allow everyone to read the directory, since it does not | |
4384 | * buy us anything to hide its content. | |
4385 | */ | |
4386 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4387 | if (ret < 0) { |
4388 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4389 | PERROR("chmod"); |
d1613cf5 JN |
4390 | } |
4391 | ||
d6f42150 | 4392 | /* lttng client socket path */ |
996b65c8 | 4393 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4394 | if (ret < 0) { |
d6f42150 | 4395 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4396 | PERROR("chown"); |
d6f42150 DG |
4397 | } |
4398 | ||
3bd1e081 | 4399 | /* kconsumer error socket path */ |
6c71277b | 4400 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4401 | if (ret < 0) { |
3bd1e081 | 4402 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4403 | PERROR("chown"); |
3bd1e081 MD |
4404 | } |
4405 | ||
7753dea8 | 4406 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4407 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4408 | if (ret < 0) { |
4409 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4410 | PERROR("chown"); |
7753dea8 MD |
4411 | } |
4412 | ||
4413 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4414 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4415 | if (ret < 0) { |
7753dea8 | 4416 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4417 | PERROR("chown"); |
fac6795d DG |
4418 | } |
4419 | ||
d6f42150 | 4420 | DBG("All permissions are set"); |
e07ae692 | 4421 | |
fac6795d DG |
4422 | return ret; |
4423 | } | |
4424 | ||
d6f42150 | 4425 | /* |
d063d709 | 4426 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4427 | */ |
67e40797 | 4428 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4429 | { |
4430 | int ret; | |
4431 | ||
67e40797 DG |
4432 | DBG3("Creating LTTng run directory: %s", rundir); |
4433 | ||
d1613cf5 | 4434 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4435 | if (ret < 0) { |
b1f11e69 | 4436 | if (errno != EEXIST) { |
67e40797 | 4437 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4438 | goto error; |
4439 | } else { | |
4440 | ret = 0; | |
4441 | } | |
d6f42150 DG |
4442 | } |
4443 | ||
4444 | error: | |
4445 | return ret; | |
4446 | } | |
4447 | ||
4448 | /* | |
d063d709 DG |
4449 | * Setup sockets and directory needed by the kconsumerd communication with the |
4450 | * session daemon. | |
d6f42150 | 4451 | */ |
67e40797 DG |
4452 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4453 | const char *rundir) | |
d6f42150 DG |
4454 | { |
4455 | int ret; | |
67e40797 | 4456 | char path[PATH_MAX]; |
d6f42150 | 4457 | |
6c71277b | 4458 | switch (consumer_data->type) { |
7753dea8 | 4459 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4460 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4461 | break; |
4462 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4463 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4464 | break; |
4465 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4466 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4467 | break; |
4468 | default: | |
4469 | ERR("Consumer type unknown"); | |
4470 | ret = -EINVAL; | |
4471 | goto error; | |
d6f42150 DG |
4472 | } |
4473 | ||
67e40797 DG |
4474 | DBG2("Creating consumer directory: %s", path); |
4475 | ||
6c71277b | 4476 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4477 | if (ret < 0) { |
6beb2242 | 4478 | if (errno != EEXIST) { |
f11e84c2 | 4479 | PERROR("mkdir"); |
3bd1e081 | 4480 | ERR("Failed to create %s", path); |
6beb2242 DG |
4481 | goto error; |
4482 | } | |
f11e84c2 | 4483 | ret = -1; |
d6f42150 | 4484 | } |
6c71277b MD |
4485 | if (is_root) { |
4486 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4487 | if (ret < 0) { | |
4488 | ERR("Unable to set group on %s", path); | |
4489 | PERROR("chown"); | |
4490 | goto error; | |
4491 | } | |
4492 | } | |
d6f42150 DG |
4493 | |
4494 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4495 | consumer_data->err_sock = |
4496 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4497 | if (consumer_data->err_sock < 0) { | |
4498 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4499 | ret = -1; |
4500 | goto error; | |
4501 | } | |
4502 | ||
a24f05ab MD |
4503 | /* |
4504 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4505 | * show must go on. | |
4506 | */ | |
4507 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4508 | if (ret < 0) { | |
4509 | PERROR("utils_set_fd_cloexec"); | |
4510 | /* continue anyway */ | |
4511 | } | |
4512 | ||
d6f42150 | 4513 | /* File permission MUST be 660 */ |
3bd1e081 | 4514 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4515 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4516 | if (ret < 0) { |
3bd1e081 | 4517 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4518 | PERROR("chmod"); |
d6f42150 DG |
4519 | goto error; |
4520 | } | |
4521 | ||
4522 | error: | |
4523 | return ret; | |
4524 | } | |
4525 | ||
fac6795d | 4526 | /* |
d063d709 | 4527 | * Signal handler for the daemon |
cf3af59e | 4528 | * |
54d01ffb DG |
4529 | * Simply stop all worker threads, leaving main() return gracefully after |
4530 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4531 | */ |
4532 | static void sighandler(int sig) | |
4533 | { | |
4534 | switch (sig) { | |
cf3af59e | 4535 | case SIGPIPE: |
af87c45a | 4536 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4537 | return; |
4538 | case SIGINT: | |
af87c45a | 4539 | DBG("SIGINT caught"); |
cf3af59e MD |
4540 | stop_threads(); |
4541 | break; | |
4542 | case SIGTERM: | |
af87c45a | 4543 | DBG("SIGTERM caught"); |
cf3af59e MD |
4544 | stop_threads(); |
4545 | break; | |
0bb7724a DG |
4546 | case SIGUSR1: |
4547 | CMM_STORE_SHARED(recv_child_signal, 1); | |
4548 | break; | |
cf3af59e MD |
4549 | default: |
4550 | break; | |
fac6795d | 4551 | } |
fac6795d DG |
4552 | } |
4553 | ||
4554 | /* | |
d063d709 | 4555 | * Setup signal handler for : |
1d4b027a | 4556 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4557 | */ |
1d4b027a | 4558 | static int set_signal_handler(void) |
fac6795d | 4559 | { |
1d4b027a DG |
4560 | int ret = 0; |
4561 | struct sigaction sa; | |
4562 | sigset_t sigset; | |
fac6795d | 4563 | |
1d4b027a | 4564 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4565 | PERROR("sigemptyset"); |
1d4b027a DG |
4566 | return ret; |
4567 | } | |
d6f42150 | 4568 | |
1d4b027a DG |
4569 | sa.sa_handler = sighandler; |
4570 | sa.sa_mask = sigset; | |
4571 | sa.sa_flags = 0; | |
4572 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4573 | PERROR("sigaction"); |
1d4b027a | 4574 | return ret; |
d6f42150 DG |
4575 | } |
4576 | ||
1d4b027a | 4577 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4578 | PERROR("sigaction"); |
1d4b027a | 4579 | return ret; |
d6f42150 | 4580 | } |
aaf26714 | 4581 | |
1d4b027a | 4582 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4583 | PERROR("sigaction"); |
1d4b027a | 4584 | return ret; |
8c0faa1d DG |
4585 | } |
4586 | ||
0bb7724a DG |
4587 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
4588 | PERROR("sigaction"); | |
4589 | return ret; | |
4590 | } | |
4591 | ||
4592 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
4593 | |
4594 | return ret; | |
fac6795d DG |
4595 | } |
4596 | ||
f3ed775e | 4597 | /* |
d063d709 DG |
4598 | * Set open files limit to unlimited. This daemon can open a large number of |
4599 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4600 | */ |
4601 | static void set_ulimit(void) | |
4602 | { | |
4603 | int ret; | |
4604 | struct rlimit lim; | |
4605 | ||
a88df331 | 4606 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4607 | lim.rlim_cur = 65535; |
4608 | lim.rlim_max = 65535; | |
4609 | ||
4610 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4611 | if (ret < 0) { | |
76d7553f | 4612 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4613 | } |
4614 | } | |
4615 | ||
35f90c40 DG |
4616 | /* |
4617 | * Write pidfile using the rundir and opt_pidfile. | |
4618 | */ | |
4619 | static void write_pidfile(void) | |
4620 | { | |
4621 | int ret; | |
4622 | char pidfile_path[PATH_MAX]; | |
4623 | ||
4624 | assert(rundir); | |
4625 | ||
4626 | if (opt_pidfile) { | |
4627 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4628 | } else { | |
4629 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4630 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4631 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4632 | if (ret < 0) { | |
4633 | PERROR("snprintf pidfile path"); | |
4634 | goto error; | |
4635 | } | |
4636 | } | |
4637 | ||
4638 | /* | |
4639 | * Create pid file in rundir. Return value is of no importance. The | |
4640 | * execution will continue even though we are not able to write the file. | |
4641 | */ | |
4642 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4643 | ||
4644 | error: | |
4645 | return; | |
4646 | } | |
4647 | ||
cd9290dd DG |
4648 | /* |
4649 | * Write JUL TCP port using the rundir. | |
4650 | */ | |
4651 | static void write_julport(void) | |
4652 | { | |
4653 | int ret; | |
4654 | char path[PATH_MAX]; | |
4655 | ||
4656 | assert(rundir); | |
4657 | ||
4658 | ret = snprintf(path, sizeof(path), "%s/" | |
4659 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4660 | if (ret < 0) { | |
4661 | PERROR("snprintf julport path"); | |
4662 | goto error; | |
4663 | } | |
4664 | ||
4665 | /* | |
4666 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4667 | * The execution will continue even though we are not able to write the | |
4668 | * file. | |
4669 | */ | |
4670 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4671 | ||
4672 | error: | |
4673 | return; | |
4674 | } | |
4675 | ||
0bb7724a DG |
4676 | /* |
4677 | * Daemonize this process by forking and making the parent wait for the child | |
4678 | * to signal it indicating readiness. Once received, the parent successfully | |
4679 | * quits. | |
4680 | * | |
4681 | * The child process undergoes the same action that daemon(3) does meaning | |
4682 | * setsid, chdir, and dup /dev/null into 0, 1 and 2. | |
4683 | * | |
4684 | * Return 0 on success else -1 on error. | |
4685 | */ | |
4686 | static int daemonize(void) | |
4687 | { | |
4688 | int ret; | |
4689 | pid_t pid; | |
4690 | ||
4691 | /* Get parent pid of this process. */ | |
4692 | child_ppid = getppid(); | |
4693 | ||
4694 | pid = fork(); | |
4695 | if (pid < 0) { | |
4696 | PERROR("fork"); | |
4697 | goto error; | |
4698 | } else if (pid == 0) { | |
4699 | int fd; | |
4700 | pid_t sid; | |
4701 | ||
4702 | /* Child */ | |
4703 | ||
4704 | /* | |
4705 | * Get the newly created parent pid so we can signal that process when | |
4706 | * we are ready to operate. | |
4707 | */ | |
4708 | child_ppid = getppid(); | |
4709 | ||
4710 | sid = setsid(); | |
4711 | if (sid < 0) { | |
4712 | PERROR("setsid"); | |
4713 | goto error; | |
4714 | } | |
4715 | ||
4716 | /* Try to change directory to /. If we can't well at least notify. */ | |
4717 | ret = chdir("/"); | |
4718 | if (ret < 0) { | |
4719 | PERROR("chdir"); | |
4720 | } | |
4721 | ||
4722 | fd = open(_PATH_DEVNULL, O_RDWR, 0); | |
4723 | if (fd < 0) { | |
4724 | PERROR("open %s", _PATH_DEVNULL); | |
4725 | /* Let 0, 1 and 2 open since we can't bind them to /dev/null. */ | |
4726 | } else { | |
4727 | (void) dup2(fd, STDIN_FILENO); | |
4728 | (void) dup2(fd, STDOUT_FILENO); | |
4729 | (void) dup2(fd, STDERR_FILENO); | |
4730 | if (fd > 2) { | |
4731 | ret = close(fd); | |
4732 | if (ret < 0) { | |
4733 | PERROR("close"); | |
4734 | } | |
4735 | } | |
4736 | } | |
4737 | goto end; | |
4738 | } else { | |
4739 | /* Parent */ | |
4740 | ||
4741 | /* | |
4742 | * Waiting for child to notify this parent that it can exit. Note that | |
4743 | * sleep() is interrupted before the 1 second delay as soon as the | |
4744 | * signal is received, so it will not cause visible delay for the | |
4745 | * user. | |
4746 | */ | |
4747 | while (!CMM_LOAD_SHARED(recv_child_signal)) { | |
077df0b3 DG |
4748 | int status; |
4749 | pid_t ret; | |
4750 | ||
4751 | /* | |
4752 | * Check if child exists without blocking. If so, we have to stop | |
4753 | * this parent process and return an error. | |
4754 | */ | |
4755 | ret = waitpid(pid, &status, WNOHANG); | |
4756 | if (ret < 0 || (ret != 0 && WIFEXITED(status))) { | |
4757 | /* The child exited somehow or was not valid. */ | |
4758 | goto error; | |
4759 | } | |
0bb7724a DG |
4760 | sleep(1); |
4761 | } | |
4762 | ||
4763 | /* | |
4764 | * From this point on, the parent can exit and the child is now an | |
4765 | * operationnal session daemon ready to serve clients and applications. | |
4766 | */ | |
4767 | exit(EXIT_SUCCESS); | |
4768 | } | |
4769 | ||
4770 | end: | |
4771 | return 0; | |
4772 | ||
4773 | error: | |
4774 | return -1; | |
4775 | } | |
4776 | ||
fac6795d DG |
4777 | /* |
4778 | * main | |
4779 | */ | |
4780 | int main(int argc, char **argv) | |
4781 | { | |
fac6795d DG |
4782 | int ret = 0; |
4783 | void *status; | |
ae9e45b3 | 4784 | const char *home_path, *env_app_timeout; |
fac6795d | 4785 | |
335a95b7 MD |
4786 | init_kernel_workarounds(); |
4787 | ||
f6a9efaa DG |
4788 | rcu_register_thread(); |
4789 | ||
0bb7724a DG |
4790 | if ((ret = set_signal_handler()) < 0) { |
4791 | goto error; | |
4792 | } | |
4793 | ||
7753dea8 | 4794 | setup_consumerd_path(); |
fb09408a | 4795 | |
12744796 DG |
4796 | page_size = sysconf(_SC_PAGESIZE); |
4797 | if (page_size < 0) { | |
4798 | PERROR("sysconf _SC_PAGESIZE"); | |
4799 | page_size = LONG_MAX; | |
4800 | WARN("Fallback page size to %ld", page_size); | |
4801 | } | |
4802 | ||
26296c48 | 4803 | /* Parse arguments and load the daemon configuration file */ |
fac6795d | 4804 | progname = argv[0]; |
26296c48 | 4805 | if ((ret = set_options(argc, argv)) < 0) { |
cf3af59e | 4806 | goto error; |
fac6795d DG |
4807 | } |
4808 | ||
4809 | /* Daemonize */ | |
4810 | if (opt_daemon) { | |
ceed52b5 MD |
4811 | int i; |
4812 | ||
0bb7724a | 4813 | ret = daemonize(); |
53094c05 | 4814 | if (ret < 0) { |
cf3af59e | 4815 | goto error; |
53094c05 | 4816 | } |
0bb7724a | 4817 | |
ceed52b5 | 4818 | /* |
0bb7724a DG |
4819 | * We are in the child. Make sure all other file descriptors are |
4820 | * closed, in case we are called with more opened file descriptors than | |
4821 | * the standard ones. | |
ceed52b5 MD |
4822 | */ |
4823 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4824 | (void) close(i); | |
4825 | } | |
4826 | } | |
4827 | ||
4828 | /* Create thread quit pipe */ | |
4829 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4830 | goto error; | |
fac6795d DG |
4831 | } |
4832 | ||
4833 | /* Check if daemon is UID = 0 */ | |
4834 | is_root = !getuid(); | |
4835 | ||
fac6795d | 4836 | if (is_root) { |
990570ed | 4837 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4838 | |
4839 | /* Create global run dir with root access */ | |
4840 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4841 | if (ret < 0) { |
cf3af59e | 4842 | goto error; |
d6f42150 DG |
4843 | } |
4844 | ||
fac6795d | 4845 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4846 | snprintf(apps_unix_sock_path, PATH_MAX, |
4847 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4848 | } |
4849 | ||
4850 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4851 | snprintf(client_unix_sock_path, PATH_MAX, |
4852 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4853 | } | |
0fdd1e2c DG |
4854 | |
4855 | /* Set global SHM for ust */ | |
4856 | if (strlen(wait_shm_path) == 0) { | |
4857 | snprintf(wait_shm_path, PATH_MAX, | |
4858 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4859 | } | |
67e40797 | 4860 | |
44a5e5eb DG |
4861 | if (strlen(health_unix_sock_path) == 0) { |
4862 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4863 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4864 | } | |
4865 | ||
67e40797 DG |
4866 | /* Setup kernel consumerd path */ |
4867 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4868 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4869 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4870 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4871 | |
4872 | DBG2("Kernel consumer err path: %s", | |
4873 | kconsumer_data.err_unix_sock_path); | |
4874 | DBG2("Kernel consumer cmd path: %s", | |
4875 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4876 | } else { |
feb0f3e5 | 4877 | home_path = utils_get_home_dir(); |
b082db07 | 4878 | if (home_path == NULL) { |
273ea72c DG |
4879 | /* TODO: Add --socket PATH option */ |
4880 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4881 | ret = -EPERM; |
4882 | goto error; | |
b082db07 DG |
4883 | } |
4884 | ||
67e40797 DG |
4885 | /* |
4886 | * Create rundir from home path. This will create something like | |
4887 | * $HOME/.lttng | |
4888 | */ | |
990570ed | 4889 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4890 | if (ret < 0) { |
4891 | ret = -ENOMEM; | |
4892 | goto error; | |
4893 | } | |
4894 | ||
4895 | ret = create_lttng_rundir(rundir); | |
4896 | if (ret < 0) { | |
4897 | goto error; | |
4898 | } | |
4899 | ||
fac6795d | 4900 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4901 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4902 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4903 | } |
4904 | ||
4905 | /* Set the cli tool unix socket path */ | |
4906 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4907 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4908 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4909 | } |
0fdd1e2c DG |
4910 | |
4911 | /* Set global SHM for ust */ | |
4912 | if (strlen(wait_shm_path) == 0) { | |
4913 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4914 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4915 | } |
44a5e5eb DG |
4916 | |
4917 | /* Set health check Unix path */ | |
4918 | if (strlen(health_unix_sock_path) == 0) { | |
4919 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4920 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4921 | } | |
fac6795d DG |
4922 | } |
4923 | ||
5c827ce0 DG |
4924 | /* Set consumer initial state */ |
4925 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4926 | ust_consumerd_state = CONSUMER_STOPPED; | |
4927 | ||
847177cd DG |
4928 | DBG("Client socket path %s", client_unix_sock_path); |
4929 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4930 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4931 | DBG("LTTng run directory path: %s", rundir); |
4932 | ||
4933 | /* 32 bits consumerd path setup */ | |
4934 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4935 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4936 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4937 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4938 | |
4939 | DBG2("UST consumer 32 bits err path: %s", | |
4940 | ustconsumer32_data.err_unix_sock_path); | |
4941 | DBG2("UST consumer 32 bits cmd path: %s", | |
4942 | ustconsumer32_data.cmd_unix_sock_path); | |
4943 | ||
4944 | /* 64 bits consumerd path setup */ | |
4945 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4946 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4947 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4948 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4949 | |
4950 | DBG2("UST consumer 64 bits err path: %s", | |
4951 | ustconsumer64_data.err_unix_sock_path); | |
4952 | DBG2("UST consumer 64 bits cmd path: %s", | |
4953 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4954 | |
273ea72c | 4955 | /* |
7d8234d9 | 4956 | * See if daemon already exist. |
fac6795d | 4957 | */ |
7d8234d9 | 4958 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4959 | ERR("Already running daemon.\n"); |
273ea72c | 4960 | /* |
cf3af59e MD |
4961 | * We do not goto exit because we must not cleanup() |
4962 | * because a daemon is already running. | |
ab118b20 | 4963 | */ |
cf3af59e | 4964 | goto error; |
a88df331 DG |
4965 | } |
4966 | ||
1427f9b2 DG |
4967 | /* |
4968 | * Init UST app hash table. Alloc hash table before this point since | |
4969 | * cleanup() can get called after that point. | |
4970 | */ | |
4971 | ust_app_ht_alloc(); | |
4972 | ||
f20baf8e DG |
4973 | /* Initialize JUL domain subsystem. */ |
4974 | if ((ret = jul_init()) < 0) { | |
4975 | /* ENOMEM at this point. */ | |
4976 | goto error; | |
4977 | } | |
4978 | ||
54d01ffb | 4979 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4980 | |
4981 | /* | |
4982 | * These actions must be executed as root. We do that *after* setting up | |
4983 | * the sockets path because we MUST make the check for another daemon using | |
4984 | * those paths *before* trying to set the kernel consumer sockets and init | |
4985 | * kernel tracer. | |
4986 | */ | |
4987 | if (is_root) { | |
67e40797 | 4988 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4989 | if (ret < 0) { |
4990 | goto exit; | |
4991 | } | |
4992 | ||
a88df331 | 4993 | /* Setup kernel tracer */ |
4fba7219 DG |
4994 | if (!opt_no_kernel) { |
4995 | init_kernel_tracer(); | |
4996 | } | |
a88df331 DG |
4997 | |
4998 | /* Set ulimit for open files */ | |
4999 | set_ulimit(); | |
fac6795d | 5000 | } |
4063050c MD |
5001 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5002 | lttng_fd_init(); | |
fac6795d | 5003 | |
67e40797 DG |
5004 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
5005 | if (ret < 0) { | |
5006 | goto exit; | |
5007 | } | |
5008 | ||
5009 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
5010 | if (ret < 0) { | |
5011 | goto exit; | |
5012 | } | |
5013 | ||
d6f42150 | 5014 | /* Setup the needed unix socket */ |
cf3af59e MD |
5015 | if ((ret = init_daemon_socket()) < 0) { |
5016 | goto exit; | |
fac6795d DG |
5017 | } |
5018 | ||
5019 | /* Set credentials to socket */ | |
be040666 | 5020 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 5021 | goto exit; |
fac6795d DG |
5022 | } |
5023 | ||
5b8719f5 DG |
5024 | /* Get parent pid if -S, --sig-parent is specified. */ |
5025 | if (opt_sig_parent) { | |
5026 | ppid = getppid(); | |
5027 | } | |
5028 | ||
7a485870 | 5029 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
5030 | if (is_root && !opt_no_kernel) { |
5031 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
5032 | goto exit; | |
5033 | } | |
7a485870 DG |
5034 | } |
5035 | ||
0b2dc8df MD |
5036 | /* Setup the thread ht_cleanup communication pipe. */ |
5037 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
5038 | goto exit; | |
5039 | } | |
5040 | ||
099e26bd | 5041 | /* Setup the thread apps communication pipe. */ |
ef599319 | 5042 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
5043 | goto exit; |
5044 | } | |
5045 | ||
d0b96690 DG |
5046 | /* Setup the thread apps notify communication pipe. */ |
5047 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
5048 | goto exit; | |
5049 | } | |
5050 | ||
7972aab2 DG |
5051 | /* Initialize global buffer per UID and PID registry. */ |
5052 | buffer_reg_init_uid_registry(); | |
5053 | buffer_reg_init_pid_registry(); | |
5054 | ||
099e26bd DG |
5055 | /* Init UST command queue. */ |
5056 | cds_wfq_init(&ust_cmd_queue.queue); | |
5057 | ||
273ea72c | 5058 | /* |
54d01ffb DG |
5059 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
5060 | * statically declared in session.c | |
273ea72c | 5061 | */ |
54d01ffb | 5062 | session_list_ptr = session_get_list(); |
b5541356 | 5063 | |
5eb91c98 DG |
5064 | /* Set up max poll set size */ |
5065 | lttng_poll_set_max_size(); | |
5066 | ||
2f77fc4b | 5067 | cmd_init(); |
00e2e675 | 5068 | |
ae9e45b3 DG |
5069 | /* Check for the application socket timeout env variable. */ |
5070 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5071 | if (env_app_timeout) { | |
5072 | app_socket_timeout = atoi(env_app_timeout); | |
5073 | } else { | |
5074 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
5075 | } | |
5076 | ||
35f90c40 | 5077 | write_pidfile(); |
cd9290dd | 5078 | write_julport(); |
35f90c40 | 5079 | |
554831e7 MD |
5080 | /* Initialize communication library */ |
5081 | lttcomm_init(); | |
d831c249 DG |
5082 | /* This is to get the TCP timeout value. */ |
5083 | lttcomm_inet_init(); | |
554831e7 | 5084 | |
67e05644 DG |
5085 | /* |
5086 | * Initialize the health check subsystem. This call should set the | |
5087 | * appropriate time values. | |
5088 | */ | |
6c71277b | 5089 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
5090 | if (!health_sessiond) { |
5091 | PERROR("health_app_create error"); | |
5092 | goto exit_health_sessiond_cleanup; | |
5093 | } | |
67e05644 | 5094 | |
d5b9fd2f | 5095 | /* Create thread to clean up RCU hash tables */ |
0b2dc8df MD |
5096 | ret = pthread_create(&ht_cleanup_thread, NULL, |
5097 | thread_ht_cleanup, (void *) NULL); | |
5098 | if (ret != 0) { | |
5099 | PERROR("pthread_create ht_cleanup"); | |
5100 | goto exit_ht_cleanup; | |
5101 | } | |
5102 | ||
d5b9fd2f | 5103 | /* Create health-check thread */ |
44a5e5eb DG |
5104 | ret = pthread_create(&health_thread, NULL, |
5105 | thread_manage_health, (void *) NULL); | |
5106 | if (ret != 0) { | |
5107 | PERROR("pthread_create health"); | |
5108 | goto exit_health; | |
5109 | } | |
5110 | ||
cf3af59e | 5111 | /* Create thread to manage the client socket */ |
099e26bd DG |
5112 | ret = pthread_create(&client_thread, NULL, |
5113 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 5114 | if (ret != 0) { |
76d7553f | 5115 | PERROR("pthread_create clients"); |
cf3af59e MD |
5116 | goto exit_client; |
5117 | } | |
fac6795d | 5118 | |
099e26bd DG |
5119 | /* Create thread to dispatch registration */ |
5120 | ret = pthread_create(&dispatch_thread, NULL, | |
5121 | thread_dispatch_ust_registration, (void *) NULL); | |
5122 | if (ret != 0) { | |
76d7553f | 5123 | PERROR("pthread_create dispatch"); |
099e26bd DG |
5124 | goto exit_dispatch; |
5125 | } | |
5126 | ||
5127 | /* Create thread to manage application registration. */ | |
5128 | ret = pthread_create(®_apps_thread, NULL, | |
5129 | thread_registration_apps, (void *) NULL); | |
5130 | if (ret != 0) { | |
76d7553f | 5131 | PERROR("pthread_create registration"); |
099e26bd DG |
5132 | goto exit_reg_apps; |
5133 | } | |
5134 | ||
cf3af59e | 5135 | /* Create thread to manage application socket */ |
54d01ffb DG |
5136 | ret = pthread_create(&apps_thread, NULL, |
5137 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 5138 | if (ret != 0) { |
d0b96690 DG |
5139 | PERROR("pthread_create apps"); |
5140 | goto exit_apps; | |
5141 | } | |
5142 | ||
5143 | /* Create thread to manage application notify socket */ | |
5144 | ret = pthread_create(&apps_notify_thread, NULL, | |
5145 | ust_thread_manage_notify, (void *) NULL); | |
5146 | if (ret != 0) { | |
76d7553f | 5147 | PERROR("pthread_create apps"); |
9563b0ad | 5148 | goto exit_apps_notify; |
cf3af59e | 5149 | } |
fac6795d | 5150 | |
4d076222 DG |
5151 | /* Create JUL registration thread. */ |
5152 | ret = pthread_create(&jul_reg_thread, NULL, | |
5153 | jul_thread_manage_registration, (void *) NULL); | |
5154 | if (ret != 0) { | |
5155 | PERROR("pthread_create apps"); | |
5156 | goto exit_jul_reg; | |
5157 | } | |
5158 | ||
6620da75 DG |
5159 | /* Don't start this thread if kernel tracing is not requested nor root */ |
5160 | if (is_root && !opt_no_kernel) { | |
5161 | /* Create kernel thread to manage kernel event */ | |
5162 | ret = pthread_create(&kernel_thread, NULL, | |
5163 | thread_manage_kernel, (void *) NULL); | |
5164 | if (ret != 0) { | |
5165 | PERROR("pthread_create kernel"); | |
5166 | goto exit_kernel; | |
5167 | } | |
7a485870 | 5168 | |
6620da75 DG |
5169 | ret = pthread_join(kernel_thread, &status); |
5170 | if (ret != 0) { | |
5171 | PERROR("pthread_join"); | |
5172 | goto error; /* join error, exit without cleanup */ | |
5173 | } | |
fac6795d DG |
5174 | } |
5175 | ||
cf3af59e | 5176 | exit_kernel: |
4d076222 DG |
5177 | ret = pthread_join(jul_reg_thread, &status); |
5178 | if (ret != 0) { | |
5179 | PERROR("pthread_join JUL"); | |
5180 | goto error; /* join error, exit without cleanup */ | |
5181 | } | |
5182 | ||
5183 | exit_jul_reg: | |
9563b0ad DG |
5184 | ret = pthread_join(apps_notify_thread, &status); |
5185 | if (ret != 0) { | |
5186 | PERROR("pthread_join apps notify"); | |
5187 | goto error; /* join error, exit without cleanup */ | |
5188 | } | |
5189 | ||
5190 | exit_apps_notify: | |
cf3af59e MD |
5191 | ret = pthread_join(apps_thread, &status); |
5192 | if (ret != 0) { | |
9563b0ad | 5193 | PERROR("pthread_join apps"); |
cf3af59e MD |
5194 | goto error; /* join error, exit without cleanup */ |
5195 | } | |
fac6795d | 5196 | |
4ccd8c8f | 5197 | |
cf3af59e | 5198 | exit_apps: |
099e26bd DG |
5199 | ret = pthread_join(reg_apps_thread, &status); |
5200 | if (ret != 0) { | |
76d7553f | 5201 | PERROR("pthread_join"); |
099e26bd DG |
5202 | goto error; /* join error, exit without cleanup */ |
5203 | } | |
5204 | ||
5205 | exit_reg_apps: | |
5206 | ret = pthread_join(dispatch_thread, &status); | |
5207 | if (ret != 0) { | |
76d7553f | 5208 | PERROR("pthread_join"); |
099e26bd DG |
5209 | goto error; /* join error, exit without cleanup */ |
5210 | } | |
5211 | ||
5212 | exit_dispatch: | |
cf3af59e MD |
5213 | ret = pthread_join(client_thread, &status); |
5214 | if (ret != 0) { | |
76d7553f | 5215 | PERROR("pthread_join"); |
cf3af59e MD |
5216 | goto error; /* join error, exit without cleanup */ |
5217 | } | |
5218 | ||
3bd1e081 | 5219 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 5220 | if (ret != 0) { |
76d7553f | 5221 | PERROR("join_consumer"); |
cf3af59e MD |
5222 | goto error; /* join error, exit without cleanup */ |
5223 | } | |
a88df331 | 5224 | |
06f525de DG |
5225 | ret = join_consumer_thread(&ustconsumer32_data); |
5226 | if (ret != 0) { | |
5227 | PERROR("join_consumer ust32"); | |
5228 | goto error; /* join error, exit without cleanup */ | |
5229 | } | |
5230 | ||
5231 | ret = join_consumer_thread(&ustconsumer64_data); | |
5232 | if (ret != 0) { | |
5233 | PERROR("join_consumer ust64"); | |
5234 | goto error; /* join error, exit without cleanup */ | |
5235 | } | |
5236 | ||
cf3af59e | 5237 | exit_client: |
06f525de DG |
5238 | ret = pthread_join(health_thread, &status); |
5239 | if (ret != 0) { | |
5240 | PERROR("pthread_join health thread"); | |
5241 | goto error; /* join error, exit without cleanup */ | |
5242 | } | |
5243 | ||
44a5e5eb | 5244 | exit_health: |
0b2dc8df MD |
5245 | ret = pthread_join(ht_cleanup_thread, &status); |
5246 | if (ret != 0) { | |
5247 | PERROR("pthread_join ht cleanup thread"); | |
5248 | goto error; /* join error, exit without cleanup */ | |
5249 | } | |
5250 | exit_ht_cleanup: | |
8782cc74 MD |
5251 | health_app_destroy(health_sessiond); |
5252 | exit_health_sessiond_cleanup: | |
a88df331 | 5253 | exit: |
cf3af59e MD |
5254 | /* |
5255 | * cleanup() is called when no other thread is running. | |
5256 | */ | |
f6a9efaa | 5257 | rcu_thread_online(); |
cf3af59e | 5258 | cleanup(); |
f6a9efaa DG |
5259 | rcu_thread_offline(); |
5260 | rcu_unregister_thread(); | |
67e40797 | 5261 | if (!ret) { |
cf3af59e | 5262 | exit(EXIT_SUCCESS); |
67e40797 | 5263 | } |
cf3af59e | 5264 | error: |
5e16da05 | 5265 | exit(EXIT_FAILURE); |
fac6795d | 5266 | } |