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 | ||
6c1c0768 | 20 | #define _LGPL_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> |
4f0b90ee | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
fac6795d | 52 | |
10a8a223 | 53 | #include "lttng-sessiond.h" |
7972aab2 | 54 | #include "buffer-registry.h" |
54d01ffb | 55 | #include "channel.h" |
2f77fc4b | 56 | #include "cmd.h" |
00e2e675 | 57 | #include "consumer.h" |
099e26bd | 58 | #include "context.h" |
54d01ffb | 59 | #include "event.h" |
4771f025 | 60 | #include "kernel.h" |
f1e16794 | 61 | #include "kernel-consumer.h" |
096102bd | 62 | #include "modprobe.h" |
0fdd1e2c | 63 | #include "shm.h" |
1e307fab | 64 | #include "ust-ctl.h" |
00e2e675 | 65 | #include "ust-consumer.h" |
8e68d1c8 | 66 | #include "utils.h" |
4063050c | 67 | #include "fd-limit.h" |
8782cc74 | 68 | #include "health-sessiond.h" |
8ac94142 | 69 | #include "testpoint.h" |
d0b96690 | 70 | #include "ust-thread.h" |
022d91ba | 71 | #include "agent-thread.h" |
fb198a11 | 72 | #include "save.h" |
ef367a93 | 73 | #include "load-session-thread.h" |
b3530820 JG |
74 | #include "notification-thread.h" |
75 | #include "notification-thread-commands.h" | |
db66e574 | 76 | #include "rotation-thread.h" |
834978fd | 77 | #include "syscall.h" |
7c1d2758 | 78 | #include "agent.h" |
5e97de00 | 79 | #include "ht-cleanup.h" |
e6142f2e | 80 | #include "sessiond-config.h" |
ebaeda94 | 81 | |
4fc83d94 PP |
82 | static const char *help_msg = |
83 | #ifdef LTTNG_EMBED_HELP | |
84 | #include <lttng-sessiond.8.h> | |
85 | #else | |
86 | NULL | |
87 | #endif | |
88 | ; | |
89 | ||
fac6795d | 90 | const char *progname; |
1d4b027a | 91 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 92 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
c9cb3e7d | 93 | static int lockfile_fd = -1; |
3bd1e081 | 94 | |
0bb7724a DG |
95 | /* Set to 1 when a SIGUSR1 signal is received. */ |
96 | static int recv_child_signal; | |
97 | ||
88076e89 JD |
98 | static struct lttng_kernel_tracer_version kernel_tracer_version; |
99 | static struct lttng_kernel_tracer_abi_version kernel_tracer_abi_version; | |
100 | ||
a23ec3a7 DG |
101 | /* |
102 | * Consumer daemon specific control data. Every value not initialized here is | |
103 | * set to 0 by the static definition. | |
104 | */ | |
3bd1e081 MD |
105 | static struct consumer_data kconsumer_data = { |
106 | .type = LTTNG_CONSUMER_KERNEL, | |
03550b58 MD |
107 | .err_sock = -1, |
108 | .cmd_sock = -1, | |
b3530820 | 109 | .channel_monitor_pipe = -1, |
62c43103 | 110 | .channel_rotate_pipe = -1, |
173af62f DG |
111 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
112 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
113 | .cond = PTHREAD_COND_INITIALIZER, |
114 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 115 | }; |
7753dea8 MD |
116 | static struct consumer_data ustconsumer64_data = { |
117 | .type = LTTNG_CONSUMER64_UST, | |
03550b58 MD |
118 | .err_sock = -1, |
119 | .cmd_sock = -1, | |
b3530820 | 120 | .channel_monitor_pipe = -1, |
62c43103 | 121 | .channel_rotate_pipe = -1, |
173af62f DG |
122 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
123 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
124 | .cond = PTHREAD_COND_INITIALIZER, |
125 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
126 | }; |
127 | static struct consumer_data ustconsumer32_data = { | |
128 | .type = LTTNG_CONSUMER32_UST, | |
03550b58 MD |
129 | .err_sock = -1, |
130 | .cmd_sock = -1, | |
b3530820 | 131 | .channel_monitor_pipe = -1, |
62c43103 | 132 | .channel_rotate_pipe = -1, |
173af62f DG |
133 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
134 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
135 | .cond = PTHREAD_COND_INITIALIZER, |
136 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
137 | }; |
138 | ||
26296c48 JG |
139 | /* Command line options */ |
140 | static const struct option long_options[] = { | |
0f5ea17c JG |
141 | { "client-sock", required_argument, 0, 'c' }, |
142 | { "apps-sock", required_argument, 0, 'a' }, | |
143 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
144 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
145 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
146 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
147 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
148 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
149 | { "consumerd32-path", required_argument, 0, '\0' }, | |
150 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
151 | { "consumerd64-path", required_argument, 0, '\0' }, | |
152 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
153 | { "daemonize", no_argument, 0, 'd' }, | |
154 | { "background", no_argument, 0, 'b' }, | |
155 | { "sig-parent", no_argument, 0, 'S' }, | |
156 | { "help", no_argument, 0, 'h' }, | |
157 | { "group", required_argument, 0, 'g' }, | |
158 | { "version", no_argument, 0, 'V' }, | |
159 | { "quiet", no_argument, 0, 'q' }, | |
160 | { "verbose", no_argument, 0, 'v' }, | |
161 | { "verbose-consumer", no_argument, 0, '\0' }, | |
162 | { "no-kernel", no_argument, 0, '\0' }, | |
163 | { "pidfile", required_argument, 0, 'p' }, | |
164 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
165 | { "config", required_argument, 0, 'f' }, | |
166 | { "load", required_argument, 0, 'l' }, | |
167 | { "kmod-probes", required_argument, 0, '\0' }, | |
168 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
169 | { NULL, 0, 0, 0 } |
170 | }; | |
171 | ||
e6142f2e JG |
172 | struct sessiond_config config; |
173 | ||
26296c48 JG |
174 | /* Command line options to ignore from configuration file */ |
175 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
176 | ||
26c9d55e | 177 | /* Shared between threads */ |
099e26bd | 178 | static int dispatch_thread_exit; |
fac6795d | 179 | |
1d4b027a | 180 | /* Sockets and FDs */ |
a4b35e07 MD |
181 | static int client_sock = -1; |
182 | static int apps_sock = -1; | |
2f77fc4b | 183 | int kernel_tracer_fd = -1; |
76d7553f | 184 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 185 | |
273ea72c DG |
186 | /* |
187 | * Quit pipe for all threads. This permits a single cancellation point | |
188 | * for all threads when receiving an event on the pipe. | |
189 | */ | |
76d7553f | 190 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 191 | |
099e26bd DG |
192 | /* |
193 | * This pipe is used to inform the thread managing application communication | |
194 | * that a command is queued and ready to be processed. | |
195 | */ | |
76d7553f | 196 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 197 | |
d0b96690 DG |
198 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
199 | ||
1d4b027a | 200 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 201 | static pthread_t apps_thread; |
d0b96690 | 202 | static pthread_t apps_notify_thread; |
099e26bd | 203 | static pthread_t reg_apps_thread; |
1d4b027a | 204 | static pthread_t client_thread; |
7a485870 | 205 | static pthread_t kernel_thread; |
099e26bd | 206 | static pthread_t dispatch_thread; |
44a5e5eb | 207 | static pthread_t health_thread; |
0b2dc8df | 208 | static pthread_t ht_cleanup_thread; |
022d91ba | 209 | static pthread_t agent_reg_thread; |
ef367a93 | 210 | static pthread_t load_session_thread; |
b3530820 | 211 | static pthread_t notification_thread; |
db66e574 | 212 | static pthread_t rotation_thread; |
5eb91c98 | 213 | |
099e26bd DG |
214 | /* |
215 | * UST registration command queue. This queue is tied with a futex and uses a N | |
216 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
217 | * | |
b22c5da8 DG |
218 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
219 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
220 | * the line new application socket and monitors it for any I/O error or clean | |
221 | * close that triggers an unregistration of the application. | |
099e26bd DG |
222 | */ |
223 | static struct ust_cmd_queue ust_cmd_queue; | |
224 | ||
b5541356 DG |
225 | /* |
226 | * Pointer initialized before thread creation. | |
227 | * | |
228 | * This points to the tracing session list containing the session count and a | |
229 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
230 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 231 | * |
d063d709 | 232 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 233 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
234 | */ |
235 | static struct ltt_session_list *session_list_ptr; | |
236 | ||
7753dea8 MD |
237 | int ust_consumerd64_fd = -1; |
238 | int ust_consumerd32_fd = -1; | |
239 | ||
2f77fc4b DG |
240 | static const char *module_proc_lttng = "/proc/lttng"; |
241 | ||
5c827ce0 DG |
242 | /* |
243 | * Consumer daemon state which is changed when spawning it, killing it or in | |
244 | * case of a fatal error. | |
245 | */ | |
246 | enum consumerd_state { | |
247 | CONSUMER_STARTED = 1, | |
248 | CONSUMER_STOPPED = 2, | |
249 | CONSUMER_ERROR = 3, | |
250 | }; | |
251 | ||
252 | /* | |
253 | * This consumer daemon state is used to validate if a client command will be | |
254 | * able to reach the consumer. If not, the client is informed. For instance, | |
255 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
256 | * error to the client. | |
257 | * | |
258 | * The following example shows a possible race condition of this scheme: | |
259 | * | |
260 | * consumer thread error happens | |
261 | * client cmd arrives | |
262 | * client cmd checks state -> still OK | |
263 | * consumer thread exit, sets error | |
264 | * client cmd try to talk to consumer | |
265 | * ... | |
266 | * | |
267 | * However, since the consumer is a different daemon, we have no way of making | |
268 | * sure the command will reach it safely even with this state flag. This is why | |
269 | * we consider that up to the state validation during command processing, the | |
270 | * command is safe. After that, we can not guarantee the correctness of the | |
271 | * client request vis-a-vis the consumer. | |
272 | */ | |
273 | static enum consumerd_state ust_consumerd_state; | |
274 | static enum consumerd_state kernel_consumerd_state; | |
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 | ||
f43f95a9 DG |
282 | /* Am I root or not. */ |
283 | int is_root; /* Set to 1 if the daemon is running as root */ | |
284 | ||
26296c48 JG |
285 | const char * const config_section_name = "sessiond"; |
286 | ||
ef367a93 JG |
287 | /* Load session thread information to operate. */ |
288 | struct load_session_thread_data *load_info; | |
289 | ||
b3530820 JG |
290 | /* Notification thread handle. */ |
291 | struct notification_thread_handle *notification_thread_handle; | |
292 | ||
db66e574 JD |
293 | /* Rotation thread handle. */ |
294 | struct rotation_thread_handle *rotation_thread_handle; | |
295 | ||
7c1d2758 JG |
296 | /* Global hash tables */ |
297 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
298 | ||
97bc1426 | 299 | /* |
b3530820 JG |
300 | * Whether sessiond is ready for commands/notification channel/health check |
301 | * requests. | |
97bc1426 | 302 | * NR_LTTNG_SESSIOND_READY must match the number of calls to |
ef367a93 | 303 | * sessiond_notify_ready(). |
97bc1426 | 304 | */ |
db66e574 | 305 | #define NR_LTTNG_SESSIOND_READY 5 |
97bc1426 MD |
306 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
307 | ||
5e97de00 JG |
308 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
309 | { | |
310 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
311 | } | |
312 | ||
97bc1426 | 313 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 JG |
314 | LTTNG_HIDDEN |
315 | void sessiond_notify_ready(void) | |
97bc1426 MD |
316 | { |
317 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
318 | /* | |
319 | * Notify parent pid that we are ready to accept command | |
320 | * for client side. This ppid is the one from the | |
321 | * external process that spawned us. | |
322 | */ | |
e6142f2e | 323 | if (config.sig_parent) { |
97bc1426 MD |
324 | kill(ppid, SIGUSR1); |
325 | } | |
326 | ||
327 | /* | |
328 | * Notify the parent of the fork() process that we are | |
329 | * ready. | |
330 | */ | |
e6142f2e | 331 | if (config.daemonize || config.background) { |
97bc1426 MD |
332 | kill(child_ppid, SIGUSR1); |
333 | } | |
334 | } | |
335 | } | |
336 | ||
4a15001e MD |
337 | static |
338 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
339 | int *a_pipe) | |
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 */ | |
4a15001e | 351 | ret = lttng_poll_add(events, a_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 | ||
4a15001e MD |
362 | /* |
363 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
364 | */ | |
365 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
366 | { | |
367 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
368 | } | |
369 | ||
273ea72c | 370 | /* |
5eb91c98 | 371 | * Init thread quit pipe. |
273ea72c DG |
372 | * |
373 | * Return -1 on error or 0 if all pipes are created. | |
374 | */ | |
4a15001e | 375 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 376 | { |
730389d9 | 377 | int ret, i; |
273ea72c | 378 | |
4a15001e | 379 | ret = pipe(a_pipe); |
273ea72c | 380 | if (ret < 0) { |
730389d9 | 381 | PERROR("thread quit pipe"); |
273ea72c DG |
382 | goto error; |
383 | } | |
384 | ||
730389d9 | 385 | for (i = 0; i < 2; i++) { |
4a15001e | 386 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
387 | if (ret < 0) { |
388 | PERROR("fcntl"); | |
389 | goto error; | |
390 | } | |
391 | } | |
392 | ||
273ea72c DG |
393 | error: |
394 | return ret; | |
395 | } | |
396 | ||
4a15001e MD |
397 | static int init_thread_quit_pipe(void) |
398 | { | |
399 | return __init_thread_quit_pipe(thread_quit_pipe); | |
400 | } | |
401 | ||
099e26bd DG |
402 | /* |
403 | * Stop all threads by closing the thread quit pipe. | |
404 | */ | |
cf3af59e MD |
405 | static void stop_threads(void) |
406 | { | |
5eb91c98 DG |
407 | int ret; |
408 | ||
cf3af59e MD |
409 | /* Stopping all threads */ |
410 | DBG("Terminating all threads"); | |
54d01ffb | 411 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
412 | if (ret < 0) { |
413 | ERR("write error on thread quit pipe"); | |
414 | } | |
415 | ||
099e26bd | 416 | /* Dispatch thread */ |
26c9d55e | 417 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 418 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
419 | } |
420 | ||
e975f9f8 DG |
421 | /* |
422 | * Close every consumer sockets. | |
423 | */ | |
424 | static void close_consumer_sockets(void) | |
425 | { | |
426 | int ret; | |
427 | ||
428 | if (kconsumer_data.err_sock >= 0) { | |
429 | ret = close(kconsumer_data.err_sock); | |
430 | if (ret < 0) { | |
431 | PERROR("kernel consumer err_sock close"); | |
432 | } | |
433 | } | |
434 | if (ustconsumer32_data.err_sock >= 0) { | |
435 | ret = close(ustconsumer32_data.err_sock); | |
436 | if (ret < 0) { | |
a76cbd9f | 437 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
438 | } |
439 | } | |
440 | if (ustconsumer64_data.err_sock >= 0) { | |
441 | ret = close(ustconsumer64_data.err_sock); | |
442 | if (ret < 0) { | |
a76cbd9f | 443 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
444 | } |
445 | } | |
446 | if (kconsumer_data.cmd_sock >= 0) { | |
447 | ret = close(kconsumer_data.cmd_sock); | |
448 | if (ret < 0) { | |
449 | PERROR("kernel consumer cmd_sock close"); | |
450 | } | |
451 | } | |
452 | if (ustconsumer32_data.cmd_sock >= 0) { | |
453 | ret = close(ustconsumer32_data.cmd_sock); | |
454 | if (ret < 0) { | |
a76cbd9f | 455 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
456 | } |
457 | } | |
458 | if (ustconsumer64_data.cmd_sock >= 0) { | |
459 | ret = close(ustconsumer64_data.cmd_sock); | |
460 | if (ret < 0) { | |
a76cbd9f | 461 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
462 | } |
463 | } | |
b3530820 JG |
464 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
465 | ret = close(kconsumer_data.channel_monitor_pipe); | |
466 | if (ret < 0) { | |
467 | PERROR("kernel consumer channel monitor pipe close"); | |
468 | } | |
469 | } | |
470 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
471 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
472 | if (ret < 0) { | |
473 | PERROR("UST consumerd32 channel monitor pipe close"); | |
474 | } | |
475 | } | |
476 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
477 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
478 | if (ret < 0) { | |
479 | PERROR("UST consumerd64 channel monitor pipe close"); | |
480 | } | |
481 | } | |
62c43103 JD |
482 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
483 | ret = close(kconsumer_data.channel_rotate_pipe); | |
484 | if (ret < 0) { | |
485 | PERROR("kernel consumer channel rotate pipe close"); | |
486 | } | |
487 | } | |
488 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
489 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
490 | if (ret < 0) { | |
491 | PERROR("UST consumerd32 channel rotate pipe close"); | |
492 | } | |
493 | } | |
494 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
495 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
496 | if (ret < 0) { | |
497 | PERROR("UST consumerd64 channel rotate pipe close"); | |
498 | } | |
499 | } | |
e975f9f8 DG |
500 | } |
501 | ||
4e4714cb JR |
502 | /* |
503 | * Wait on consumer process termination. | |
504 | * | |
505 | * Need to be called with the consumer data lock held or from a context | |
506 | * ensuring no concurrent access to data (e.g: cleanup). | |
507 | */ | |
508 | static void wait_consumer(struct consumer_data *consumer_data) | |
509 | { | |
510 | pid_t ret; | |
511 | int status; | |
512 | ||
513 | if (consumer_data->pid <= 0) { | |
514 | return; | |
515 | } | |
516 | ||
517 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
518 | consumer_data->pid); | |
519 | ret = waitpid(consumer_data->pid, &status, 0); | |
520 | if (ret == -1) { | |
521 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 522 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
523 | ERR("consumerd termination with error: %d", |
524 | WEXITSTATUS(ret)); | |
525 | } | |
526 | consumer_data->pid = 0; | |
527 | } | |
528 | ||
fac6795d | 529 | /* |
4a15001e | 530 | * Cleanup the session daemon's data structures. |
fac6795d | 531 | */ |
4a15001e | 532 | static void sessiond_cleanup(void) |
fac6795d | 533 | { |
ef599319 | 534 | int ret; |
af9737e9 | 535 | struct ltt_session *sess, *stmp; |
fac6795d | 536 | |
4a15001e | 537 | DBG("Cleanup sessiond"); |
e07ae692 | 538 | |
4e449f3f MD |
539 | /* |
540 | * Close the thread quit pipe. It has already done its job, | |
541 | * since we are now called. | |
542 | */ | |
2f77fc4b DG |
543 | utils_close_pipe(thread_quit_pipe); |
544 | ||
35f90c40 | 545 | /* |
e6142f2e JG |
546 | * If config.pid_file_path.value is undefined, the default file will be |
547 | * wiped when removing the rundir. | |
35f90c40 | 548 | */ |
e6142f2e JG |
549 | if (config.pid_file_path.value) { |
550 | ret = remove(config.pid_file_path.value); | |
35f90c40 | 551 | if (ret < 0) { |
e6142f2e | 552 | PERROR("remove pidfile %s", config.pid_file_path.value); |
35f90c40 DG |
553 | } |
554 | } | |
555 | ||
e6142f2e JG |
556 | DBG("Removing sessiond and consumerd content of directory %s", |
557 | config.rundir.value); | |
8c6c56c2 MD |
558 | |
559 | /* sessiond */ | |
e6142f2e JG |
560 | DBG("Removing %s", config.pid_file_path.value); |
561 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 562 | |
e6142f2e JG |
563 | DBG("Removing %s", config.agent_port_file_path.value); |
564 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 565 | |
8c6c56c2 | 566 | /* kconsumerd */ |
e6142f2e JG |
567 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
568 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
569 | ||
570 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
571 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
572 | |
573 | /* ust consumerd 32 */ | |
e6142f2e JG |
574 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
575 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
576 | ||
577 | DBG("Removing directory %s", config.consumerd32_path.value); | |
578 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
579 | |
580 | /* ust consumerd 64 */ | |
e6142f2e JG |
581 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
582 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
583 | ||
584 | DBG("Removing directory %s", config.consumerd64_path.value); | |
585 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 586 | |
99bab54f | 587 | DBG("Cleaning up all sessions"); |
fac6795d | 588 | |
b5541356 | 589 | /* Destroy session list mutex */ |
273ea72c DG |
590 | if (session_list_ptr != NULL) { |
591 | pthread_mutex_destroy(&session_list_ptr->lock); | |
592 | ||
593 | /* Cleanup ALL session */ | |
54d01ffb DG |
594 | cds_list_for_each_entry_safe(sess, stmp, |
595 | &session_list_ptr->head, list) { | |
2f77fc4b | 596 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
597 | } |
598 | } | |
599 | ||
4e4714cb JR |
600 | wait_consumer(&kconsumer_data); |
601 | wait_consumer(&ustconsumer64_data); | |
602 | wait_consumer(&ustconsumer32_data); | |
603 | ||
6a4e4039 JG |
604 | DBG("Cleaning up all agent apps"); |
605 | agent_app_ht_clean(); | |
606 | ||
099e26bd | 607 | DBG("Closing all UST sockets"); |
56fff090 | 608 | ust_app_clean_list(); |
7972aab2 | 609 | buffer_reg_destroy_registries(); |
099e26bd | 610 | |
e6142f2e | 611 | if (is_root && !config.no_kernel) { |
4fba7219 | 612 | DBG2("Closing kernel fd"); |
a4b35e07 | 613 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
614 | ret = close(kernel_tracer_fd); |
615 | if (ret) { | |
616 | PERROR("close"); | |
617 | } | |
a4b35e07 | 618 | } |
2f50c8a3 | 619 | DBG("Unloading kernel modules"); |
096102bd | 620 | modprobe_remove_lttng_all(); |
834978fd | 621 | free(syscall_table); |
2f50c8a3 | 622 | } |
2f77fc4b | 623 | |
e975f9f8 DG |
624 | close_consumer_sockets(); |
625 | ||
ef367a93 JG |
626 | if (load_info) { |
627 | load_session_destroy_data(load_info); | |
628 | free(load_info); | |
629 | } | |
630 | ||
c9cb3e7d JG |
631 | /* |
632 | * Cleanup lock file by deleting it and finaly closing it which will | |
633 | * release the file system lock. | |
634 | */ | |
635 | if (lockfile_fd >= 0) { | |
e6142f2e JG |
636 | ret = remove(config.lock_file_path.value); |
637 | if (ret < 0) { | |
638 | PERROR("remove lock file"); | |
639 | } | |
640 | ret = close(lockfile_fd); | |
641 | if (ret < 0) { | |
642 | PERROR("close lock file"); | |
c9cb3e7d JG |
643 | } |
644 | } | |
645 | ||
646 | /* | |
647 | * We do NOT rmdir rundir because there are other processes | |
648 | * using it, for instance lttng-relayd, which can start in | |
649 | * parallel with this teardown. | |
650 | */ | |
4a15001e MD |
651 | } |
652 | ||
653 | /* | |
654 | * Cleanup the daemon's option data structures. | |
655 | */ | |
656 | static void sessiond_cleanup_options(void) | |
657 | { | |
658 | DBG("Cleaning up options"); | |
659 | ||
e6142f2e | 660 | sessiond_config_fini(&config); |
c9cb3e7d | 661 | |
7567352f | 662 | run_as_destroy_worker(); |
fac6795d DG |
663 | } |
664 | ||
e065084a | 665 | /* |
d063d709 | 666 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 667 | * |
d063d709 | 668 | * Return lttcomm error code. |
e065084a DG |
669 | */ |
670 | static int send_unix_sock(int sock, void *buf, size_t len) | |
671 | { | |
672 | /* Check valid length */ | |
c617c0c6 | 673 | if (len == 0) { |
e065084a DG |
674 | return -1; |
675 | } | |
676 | ||
677 | return lttcomm_send_unix_sock(sock, buf, len); | |
678 | } | |
679 | ||
5461b305 | 680 | /* |
d063d709 | 681 | * Free memory of a command context structure. |
5461b305 | 682 | */ |
a2fb29a5 | 683 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 684 | { |
a2fb29a5 DG |
685 | DBG("Clean command context structure"); |
686 | if (*cmd_ctx) { | |
687 | if ((*cmd_ctx)->llm) { | |
688 | free((*cmd_ctx)->llm); | |
5461b305 | 689 | } |
a2fb29a5 DG |
690 | if ((*cmd_ctx)->lsm) { |
691 | free((*cmd_ctx)->lsm); | |
5461b305 | 692 | } |
a2fb29a5 DG |
693 | free(*cmd_ctx); |
694 | *cmd_ctx = NULL; | |
5461b305 DG |
695 | } |
696 | } | |
697 | ||
fac6795d | 698 | /* |
0fdd1e2c | 699 | * Notify UST applications using the shm mmap futex. |
fac6795d | 700 | */ |
0fdd1e2c | 701 | static int notify_ust_apps(int active) |
fac6795d | 702 | { |
0fdd1e2c | 703 | char *wait_shm_mmap; |
fac6795d | 704 | |
0fdd1e2c | 705 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 706 | |
0fdd1e2c | 707 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 708 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 709 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
710 | goto error; |
711 | } | |
712 | ||
0fdd1e2c DG |
713 | /* Wake waiting process */ |
714 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
715 | ||
716 | /* Apps notified successfully */ | |
717 | return 0; | |
fac6795d DG |
718 | |
719 | error: | |
0fdd1e2c | 720 | return -1; |
fac6795d DG |
721 | } |
722 | ||
e065084a | 723 | /* |
d063d709 DG |
724 | * Setup the outgoing data buffer for the response (llm) by allocating the |
725 | * right amount of memory and copying the original information from the lsm | |
726 | * structure. | |
ca95a216 | 727 | * |
6e10c9b9 | 728 | * Return 0 on success, negative value on error. |
ca95a216 | 729 | */ |
6e10c9b9 PP |
730 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
731 | const void *payload_buf, size_t payload_len, | |
732 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 733 | { |
6e10c9b9 PP |
734 | int ret = 0; |
735 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
736 | const size_t cmd_header_offset = header_len; | |
737 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
738 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 739 | |
6e10c9b9 | 740 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 741 | |
5461b305 | 742 | if (cmd_ctx->llm == NULL) { |
76d7553f | 743 | PERROR("zmalloc"); |
5461b305 | 744 | ret = -ENOMEM; |
6e10c9b9 | 745 | goto end; |
ca95a216 DG |
746 | } |
747 | ||
5461b305 DG |
748 | /* Copy common data */ |
749 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 750 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
751 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
752 | cmd_ctx->llm->data_size = payload_len; | |
753 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 754 | |
6e10c9b9 | 755 | /* Copy command header */ |
b4e3ceb9 PP |
756 | if (cmd_header_len) { |
757 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
758 | cmd_header_len); | |
759 | } | |
5461b305 | 760 | |
6e10c9b9 | 761 | /* Copy payload */ |
b4e3ceb9 PP |
762 | if (payload_len) { |
763 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
764 | payload_len); | |
765 | } | |
ca95a216 | 766 | |
6e10c9b9 | 767 | end: |
ca95a216 DG |
768 | return ret; |
769 | } | |
770 | ||
6e10c9b9 PP |
771 | /* |
772 | * Version of setup_lttng_msg() without command header. | |
773 | */ | |
774 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
775 | void *payload_buf, size_t payload_len) | |
776 | { | |
777 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
778 | } | |
7a485870 | 779 | /* |
5eb91c98 | 780 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 781 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 782 | */ |
5eb91c98 | 783 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 784 | { |
5eb91c98 | 785 | int ret; |
7a485870 DG |
786 | struct ltt_session *session; |
787 | struct ltt_kernel_channel *channel; | |
788 | ||
5eb91c98 | 789 | DBG("Updating kernel poll set"); |
7a485870 | 790 | |
54d01ffb | 791 | session_lock_list(); |
b5541356 | 792 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 793 | session_lock(session); |
7a485870 | 794 | if (session->kernel_session == NULL) { |
54d01ffb | 795 | session_unlock(session); |
7a485870 DG |
796 | continue; |
797 | } | |
7a485870 | 798 | |
54d01ffb DG |
799 | cds_list_for_each_entry(channel, |
800 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
801 | /* Add channel fd to the kernel poll set */ |
802 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
803 | if (ret < 0) { | |
54d01ffb | 804 | session_unlock(session); |
5eb91c98 DG |
805 | goto error; |
806 | } | |
807 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 808 | } |
54d01ffb | 809 | session_unlock(session); |
7a485870 | 810 | } |
54d01ffb | 811 | session_unlock_list(); |
7a485870 | 812 | |
5eb91c98 | 813 | return 0; |
7a485870 DG |
814 | |
815 | error: | |
54d01ffb | 816 | session_unlock_list(); |
7a485870 DG |
817 | return -1; |
818 | } | |
819 | ||
820 | /* | |
54d01ffb | 821 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 822 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 823 | * |
d063d709 | 824 | * Useful for CPU hotplug feature. |
7a485870 | 825 | */ |
2bdd86d4 | 826 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
827 | { |
828 | int ret = 0; | |
829 | struct ltt_session *session; | |
173af62f | 830 | struct ltt_kernel_session *ksess; |
7a485870 DG |
831 | struct ltt_kernel_channel *channel; |
832 | ||
833 | DBG("Updating kernel streams for channel fd %d", fd); | |
834 | ||
54d01ffb | 835 | session_lock_list(); |
b5541356 | 836 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 837 | session_lock(session); |
7a485870 | 838 | if (session->kernel_session == NULL) { |
54d01ffb | 839 | session_unlock(session); |
7a485870 DG |
840 | continue; |
841 | } | |
173af62f | 842 | ksess = session->kernel_session; |
d9800920 | 843 | |
4a15001e MD |
844 | cds_list_for_each_entry(channel, |
845 | &ksess->channel_list.head, list) { | |
846 | struct lttng_ht_iter iter; | |
847 | struct consumer_socket *socket; | |
d9800920 | 848 | |
4a15001e MD |
849 | if (channel->fd != fd) { |
850 | continue; | |
851 | } | |
852 | DBG("Channel found, updating kernel streams"); | |
853 | ret = kernel_open_channel_stream(channel); | |
854 | if (ret < 0) { | |
855 | goto error; | |
856 | } | |
857 | /* Update the stream global counter */ | |
858 | ksess->stream_count_global += ret; | |
859 | ||
860 | /* | |
861 | * Have we already sent fds to the consumer? If yes, it | |
862 | * means that tracing is started so it is safe to send | |
863 | * our updated stream fds. | |
864 | */ | |
865 | if (ksess->consumer_fds_sent != 1 | |
866 | || ksess->consumer == NULL) { | |
867 | ret = -1; | |
868 | goto error; | |
869 | } | |
870 | ||
871 | rcu_read_lock(); | |
872 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
873 | &iter.iter, socket, node.node) { | |
874 | pthread_mutex_lock(socket->lock); | |
875 | ret = kernel_consumer_send_channel_stream(socket, | |
876 | channel, ksess, | |
877 | session->output_traces ? 1 : 0); | |
878 | pthread_mutex_unlock(socket->lock); | |
879 | if (ret < 0) { | |
e7fe706f | 880 | rcu_read_unlock(); |
4a15001e | 881 | goto error; |
7a485870 | 882 | } |
7a485870 | 883 | } |
4a15001e | 884 | rcu_read_unlock(); |
7a485870 | 885 | } |
54d01ffb | 886 | session_unlock(session); |
7a485870 | 887 | } |
54d01ffb | 888 | session_unlock_list(); |
b3c750d2 | 889 | return ret; |
7a485870 | 890 | |
b3c750d2 | 891 | error: |
54d01ffb DG |
892 | session_unlock(session); |
893 | session_unlock_list(); | |
7a485870 DG |
894 | return ret; |
895 | } | |
896 | ||
487cf67c | 897 | /* |
ffe60014 DG |
898 | * For each tracing session, update newly registered apps. The session list |
899 | * lock MUST be acquired before calling this. | |
487cf67c DG |
900 | */ |
901 | static void update_ust_app(int app_sock) | |
902 | { | |
903 | struct ltt_session *sess, *stmp; | |
904 | ||
fdadac08 DG |
905 | /* Consumer is in an ERROR state. Stop any application update. */ |
906 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
907 | /* Stop the update process since the consumer is dead. */ | |
908 | return; | |
909 | } | |
910 | ||
487cf67c DG |
911 | /* For all tracing session(s) */ |
912 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
913 | struct ust_app *app; |
914 | ||
4ee14516 | 915 | session_lock(sess); |
a9ad0c8f MD |
916 | if (!sess->ust_session) { |
917 | goto unlock_session; | |
918 | } | |
919 | ||
920 | rcu_read_lock(); | |
921 | assert(app_sock >= 0); | |
922 | app = ust_app_find_by_sock(app_sock); | |
923 | if (app == NULL) { | |
924 | /* | |
925 | * Application can be unregistered before so | |
926 | * this is possible hence simply stopping the | |
927 | * update. | |
928 | */ | |
929 | DBG3("UST app update failed to find app sock %d", | |
930 | app_sock); | |
931 | goto unlock_rcu; | |
421cb601 | 932 | } |
a9ad0c8f MD |
933 | ust_app_global_update(sess->ust_session, app); |
934 | unlock_rcu: | |
935 | rcu_read_unlock(); | |
936 | unlock_session: | |
4ee14516 | 937 | session_unlock(sess); |
487cf67c DG |
938 | } |
939 | } | |
940 | ||
7a485870 | 941 | /* |
d063d709 | 942 | * This thread manage event coming from the kernel. |
7a485870 | 943 | * |
d063d709 DG |
944 | * Features supported in this thread: |
945 | * -) CPU Hotplug | |
7a485870 DG |
946 | */ |
947 | static void *thread_manage_kernel(void *data) | |
948 | { | |
139ac872 | 949 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 950 | uint32_t revents, nb_fd; |
7a485870 | 951 | char tmp; |
5eb91c98 | 952 | struct lttng_poll_event events; |
7a485870 | 953 | |
6993eeb3 | 954 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 955 | |
6c71277b | 956 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 957 | |
d5d63bf1 DG |
958 | /* |
959 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 960 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 961 | */ |
6d737ce4 | 962 | lttng_poll_init(&events); |
d5d63bf1 | 963 | |
e547b070 | 964 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
965 | goto error_testpoint; |
966 | } | |
8ac94142 | 967 | |
840cb59c | 968 | health_code_update(); |
44a5e5eb | 969 | |
e547b070 | 970 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 971 | goto error_testpoint; |
6993eeb3 CB |
972 | } |
973 | ||
7a485870 | 974 | while (1) { |
840cb59c | 975 | health_code_update(); |
44a5e5eb | 976 | |
7a485870 | 977 | if (update_poll_flag == 1) { |
d21b0d71 DG |
978 | /* Clean events object. We are about to populate it again. */ |
979 | lttng_poll_clean(&events); | |
980 | ||
d0b96690 | 981 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
982 | if (ret < 0) { |
983 | goto error_poll_create; | |
984 | } | |
985 | ||
986 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
987 | if (ret < 0) { | |
988 | goto error; | |
989 | } | |
5f822d0a | 990 | |
d21b0d71 | 991 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
992 | ret = update_kernel_poll(&events); |
993 | if (ret < 0) { | |
7a485870 DG |
994 | goto error; |
995 | } | |
996 | update_poll_flag = 0; | |
997 | } | |
998 | ||
7fa2082e | 999 | DBG("Thread kernel polling"); |
7a485870 DG |
1000 | |
1001 | /* Poll infinite value of time */ | |
88f2b785 | 1002 | restart: |
a78af745 | 1003 | health_poll_entry(); |
5eb91c98 | 1004 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1005 | DBG("Thread kernel return from poll on %d fds", |
1006 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1007 | health_poll_exit(); |
7a485870 | 1008 | if (ret < 0) { |
88f2b785 MD |
1009 | /* |
1010 | * Restart interrupted system call. | |
1011 | */ | |
1012 | if (errno == EINTR) { | |
1013 | goto restart; | |
1014 | } | |
7a485870 DG |
1015 | goto error; |
1016 | } else if (ret == 0) { | |
1017 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1018 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1019 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1020 | continue; |
1021 | } | |
1022 | ||
0d9c5d77 DG |
1023 | nb_fd = ret; |
1024 | ||
5eb91c98 DG |
1025 | for (i = 0; i < nb_fd; i++) { |
1026 | /* Fetch once the poll data */ | |
1027 | revents = LTTNG_POLL_GETEV(&events, i); | |
1028 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1029 | |
840cb59c | 1030 | health_code_update(); |
44a5e5eb | 1031 | |
fd20dac9 MD |
1032 | if (!revents) { |
1033 | /* No activity for this FD (poll implementation). */ | |
1034 | continue; | |
1035 | } | |
1036 | ||
5eb91c98 | 1037 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1038 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1039 | if (ret) { |
139ac872 MD |
1040 | err = 0; |
1041 | goto exit; | |
5eb91c98 | 1042 | } |
7a485870 | 1043 | |
5eb91c98 | 1044 | /* Check for data on kernel pipe */ |
03e43155 MD |
1045 | if (revents & LPOLLIN) { |
1046 | if (pollfd == kernel_poll_pipe[0]) { | |
1047 | (void) lttng_read(kernel_poll_pipe[0], | |
1048 | &tmp, 1); | |
1049 | /* | |
1050 | * Ret value is useless here, if this pipe gets any actions an | |
1051 | * update is required anyway. | |
1052 | */ | |
1053 | update_poll_flag = 1; | |
1054 | continue; | |
1055 | } else { | |
1056 | /* | |
1057 | * New CPU detected by the kernel. Adding kernel stream to | |
1058 | * kernel session and updating the kernel consumer | |
1059 | */ | |
2bdd86d4 | 1060 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1061 | if (ret < 0) { |
1062 | continue; | |
1063 | } | |
1064 | break; | |
7a485870 | 1065 | } |
03e43155 MD |
1066 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1067 | update_poll_flag = 1; | |
1068 | continue; | |
1069 | } else { | |
1070 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1071 | goto error; | |
7a485870 DG |
1072 | } |
1073 | } | |
1074 | } | |
1075 | ||
139ac872 | 1076 | exit: |
7a485870 | 1077 | error: |
5eb91c98 | 1078 | lttng_poll_clean(&events); |
76d7553f | 1079 | error_poll_create: |
6993eeb3 | 1080 | error_testpoint: |
6620da75 DG |
1081 | utils_close_pipe(kernel_poll_pipe); |
1082 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1083 | if (err) { |
840cb59c | 1084 | health_error(); |
139ac872 | 1085 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1086 | WARN("Kernel thread died unexpectedly. " |
1087 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1088 | } |
8782cc74 | 1089 | health_unregister(health_sessiond); |
76d7553f | 1090 | DBG("Kernel thread dying"); |
7a485870 DG |
1091 | return NULL; |
1092 | } | |
1093 | ||
a23ec3a7 DG |
1094 | /* |
1095 | * Signal pthread condition of the consumer data that the thread. | |
1096 | */ | |
1097 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1098 | { | |
1099 | pthread_mutex_lock(&data->cond_mutex); | |
1100 | ||
1101 | /* | |
1102 | * The state is set before signaling. It can be any value, it's the waiter | |
1103 | * job to correctly interpret this condition variable associated to the | |
1104 | * consumer pthread_cond. | |
1105 | * | |
1106 | * A value of 0 means that the corresponding thread of the consumer data | |
1107 | * was not started. 1 indicates that the thread has started and is ready | |
1108 | * for action. A negative value means that there was an error during the | |
1109 | * thread bootstrap. | |
1110 | */ | |
1111 | data->consumer_thread_is_ready = state; | |
1112 | (void) pthread_cond_signal(&data->cond); | |
1113 | ||
1114 | pthread_mutex_unlock(&data->cond_mutex); | |
1115 | } | |
1116 | ||
1d4b027a | 1117 | /* |
3bd1e081 | 1118 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1119 | */ |
3bd1e081 | 1120 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1121 | { |
42fc1d0b | 1122 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1123 | uint32_t revents, nb_fd; |
1d4b027a | 1124 | enum lttcomm_return_code code; |
5eb91c98 | 1125 | struct lttng_poll_event events; |
3bd1e081 | 1126 | struct consumer_data *consumer_data = data; |
b3530820 | 1127 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1128 | |
3bd1e081 | 1129 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1130 | |
34c1e15a MD |
1131 | rcu_register_thread(); |
1132 | rcu_thread_online(); | |
1133 | ||
6c71277b | 1134 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1135 | |
855060f8 | 1136 | health_code_update(); |
9449cc75 | 1137 | |
5eb91c98 | 1138 | /* |
331744e3 JD |
1139 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1140 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1141 | */ |
331744e3 | 1142 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1143 | if (ret < 0) { |
76d7553f | 1144 | goto error_poll; |
5eb91c98 | 1145 | } |
273ea72c | 1146 | |
edb8b045 DG |
1147 | /* |
1148 | * The error socket here is already in a listening state which was done | |
1149 | * just before spawning this thread to avoid a race between the consumer | |
1150 | * daemon exec trying to connect and the listen() call. | |
1151 | */ | |
3bd1e081 | 1152 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1153 | if (ret < 0) { |
1154 | goto error; | |
1155 | } | |
1156 | ||
840cb59c | 1157 | health_code_update(); |
44a5e5eb | 1158 | |
331744e3 | 1159 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1160 | restart: |
a78af745 | 1161 | health_poll_entry(); |
8ac94142 | 1162 | |
e547b070 | 1163 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1164 | goto error; |
1165 | } | |
8ac94142 | 1166 | |
5eb91c98 | 1167 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1168 | health_poll_exit(); |
273ea72c | 1169 | if (ret < 0) { |
88f2b785 MD |
1170 | /* |
1171 | * Restart interrupted system call. | |
1172 | */ | |
1173 | if (errno == EINTR) { | |
1174 | goto restart; | |
1175 | } | |
273ea72c DG |
1176 | goto error; |
1177 | } | |
1178 | ||
0d9c5d77 DG |
1179 | nb_fd = ret; |
1180 | ||
5eb91c98 DG |
1181 | for (i = 0; i < nb_fd; i++) { |
1182 | /* Fetch once the poll data */ | |
1183 | revents = LTTNG_POLL_GETEV(&events, i); | |
1184 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1185 | ||
840cb59c | 1186 | health_code_update(); |
44a5e5eb | 1187 | |
fd20dac9 MD |
1188 | if (!revents) { |
1189 | /* No activity for this FD (poll implementation). */ | |
1190 | continue; | |
1191 | } | |
1192 | ||
5eb91c98 | 1193 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1194 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1195 | if (ret) { |
139ac872 MD |
1196 | err = 0; |
1197 | goto exit; | |
5eb91c98 DG |
1198 | } |
1199 | ||
1200 | /* Event on the registration socket */ | |
3bd1e081 | 1201 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1202 | if (revents & LPOLLIN) { |
1203 | continue; | |
1204 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1205 | ERR("consumer err socket poll error"); |
5eb91c98 | 1206 | goto error; |
03e43155 MD |
1207 | } else { |
1208 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1209 | goto error; | |
5eb91c98 DG |
1210 | } |
1211 | } | |
273ea72c DG |
1212 | } |
1213 | ||
3bd1e081 | 1214 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1215 | if (sock < 0) { |
1216 | goto error; | |
1217 | } | |
1218 | ||
b662582b DG |
1219 | /* |
1220 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1221 | * show must go on. | |
1222 | */ | |
1223 | (void) utils_set_fd_cloexec(sock); | |
1224 | ||
840cb59c | 1225 | health_code_update(); |
44a5e5eb | 1226 | |
3bd1e081 | 1227 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1228 | |
712ea556 | 1229 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1230 | ret = lttcomm_recv_unix_sock(sock, &code, |
1231 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1232 | if (ret <= 0) { |
1233 | goto error; | |
1234 | } | |
1235 | ||
840cb59c | 1236 | health_code_update(); |
b3530820 | 1237 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1238 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1239 | lttcomm_get_readable_code(-code)); |
1240 | goto error; | |
1241 | } | |
1242 | ||
b3530820 JG |
1243 | /* Connect both command and metadata sockets. */ |
1244 | consumer_data->cmd_sock = | |
1245 | lttcomm_connect_unix_sock( | |
1246 | consumer_data->cmd_unix_sock_path); | |
1247 | consumer_data->metadata_fd = | |
1248 | lttcomm_connect_unix_sock( | |
1249 | consumer_data->cmd_unix_sock_path); | |
1250 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1251 | PERROR("consumer connect cmd socket"); | |
1252 | /* On error, signal condition and quit. */ | |
1253 | signal_consumer_condition(consumer_data, -1); | |
1254 | goto error; | |
1255 | } | |
1256 | ||
1257 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1258 | ||
1259 | /* Create metadata socket lock. */ | |
1260 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1261 | if (consumer_data->metadata_sock.lock == NULL) { | |
1262 | PERROR("zmalloc pthread mutex"); | |
1263 | goto error; | |
1264 | } | |
1265 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1266 | ||
1267 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1268 | DBG("Consumer metadata socket ready (fd: %d)", | |
1269 | consumer_data->metadata_fd); | |
1270 | ||
1271 | /* | |
1272 | * Remove the consumerd error sock since we've established a connection. | |
1273 | */ | |
3bd1e081 | 1274 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1275 | if (ret < 0) { |
72079cae DG |
1276 | goto error; |
1277 | } | |
1278 | ||
331744e3 | 1279 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1280 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1281 | if (ret < 0) { | |
72079cae | 1282 | goto error; |
5eb91c98 DG |
1283 | } |
1284 | ||
331744e3 | 1285 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1286 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1287 | LPOLLIN | LPOLLRDHUP); |
1288 | if (ret < 0) { | |
1289 | goto error; | |
1290 | } | |
1291 | ||
840cb59c | 1292 | health_code_update(); |
44a5e5eb | 1293 | |
b3530820 | 1294 | /* |
62c43103 JD |
1295 | * Transfer the write-end of the channel monitoring and rotate pipe |
1296 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1297 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1298 | */ |
1299 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1300 | if (!cmd_socket_wrapper) { | |
1301 | goto error; | |
1302 | } | |
3e4dc117 | 1303 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1304 | |
1305 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1306 | consumer_data->channel_monitor_pipe); | |
1307 | if (ret) { | |
1308 | goto error; | |
1309 | } | |
62c43103 JD |
1310 | |
1311 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1312 | consumer_data->channel_rotate_pipe); | |
1313 | if (ret) { | |
1314 | goto error; | |
1315 | } | |
1316 | ||
b3530820 JG |
1317 | /* Discard the socket wrapper as it is no longer needed. */ |
1318 | consumer_destroy_socket(cmd_socket_wrapper); | |
1319 | cmd_socket_wrapper = NULL; | |
1320 | ||
1321 | /* The thread is completely initialized, signal that it is ready. */ | |
1322 | signal_consumer_condition(consumer_data, 1); | |
1323 | ||
331744e3 | 1324 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1325 | restart_poll: |
331744e3 | 1326 | while (1) { |
42fc1d0b DG |
1327 | health_code_update(); |
1328 | ||
1329 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1330 | if (should_quit) { | |
1331 | /* Not a health error. */ | |
1332 | err = 0; | |
1333 | goto exit; | |
1334 | } | |
1335 | ||
331744e3 JD |
1336 | health_poll_entry(); |
1337 | ret = lttng_poll_wait(&events, -1); | |
1338 | health_poll_exit(); | |
1339 | if (ret < 0) { | |
1340 | /* | |
1341 | * Restart interrupted system call. | |
1342 | */ | |
1343 | if (errno == EINTR) { | |
1344 | goto restart_poll; | |
1345 | } | |
1346 | goto error; | |
88f2b785 | 1347 | } |
72079cae | 1348 | |
331744e3 | 1349 | nb_fd = ret; |
0d9c5d77 | 1350 | |
331744e3 JD |
1351 | for (i = 0; i < nb_fd; i++) { |
1352 | /* Fetch once the poll data */ | |
1353 | revents = LTTNG_POLL_GETEV(&events, i); | |
1354 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1355 | |
331744e3 | 1356 | health_code_update(); |
44a5e5eb | 1357 | |
fd20dac9 MD |
1358 | if (!revents) { |
1359 | /* No activity for this FD (poll implementation). */ | |
1360 | continue; | |
1361 | } | |
1362 | ||
42fc1d0b DG |
1363 | /* |
1364 | * Thread quit pipe has been triggered, flag that we should stop | |
1365 | * but continue the current loop to handle potential data from | |
1366 | * consumer. | |
1367 | */ | |
1368 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1369 | |
331744e3 JD |
1370 | if (pollfd == sock) { |
1371 | /* Event on the consumerd socket */ | |
03e43155 MD |
1372 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1373 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1374 | ERR("consumer err socket second poll error"); |
1375 | goto error; | |
1376 | } | |
1377 | health_code_update(); | |
1378 | /* Wait for any kconsumerd error */ | |
1379 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1380 | sizeof(enum lttcomm_return_code)); | |
1381 | if (ret <= 0) { | |
1382 | ERR("consumer closed the command socket"); | |
1383 | goto error; | |
1384 | } | |
1385 | ||
1386 | ERR("consumer return code : %s", | |
1387 | lttcomm_get_readable_code(-code)); | |
1388 | ||
1389 | goto exit; | |
4ce514c4 | 1390 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1391 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1392 | && !(revents & LPOLLIN)) { | |
1393 | ERR("consumer err metadata socket second poll error"); | |
1394 | goto error; | |
1395 | } | |
331744e3 JD |
1396 | /* UST metadata requests */ |
1397 | ret = ust_consumer_metadata_request( | |
1398 | &consumer_data->metadata_sock); | |
1399 | if (ret < 0) { | |
1400 | ERR("Handling metadata request"); | |
1401 | goto error; | |
1402 | } | |
5eb91c98 | 1403 | } |
42fc1d0b | 1404 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1405 | } |
331744e3 | 1406 | health_code_update(); |
5eb91c98 DG |
1407 | } |
1408 | ||
139ac872 | 1409 | exit: |
1d4b027a | 1410 | error: |
fdadac08 DG |
1411 | /* |
1412 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1413 | * thread might be using them so get exclusive access which will abort all |
1414 | * other consumer command by other threads. | |
fdadac08 DG |
1415 | */ |
1416 | pthread_mutex_lock(&consumer_data->lock); | |
1417 | ||
5c827ce0 DG |
1418 | /* Immediately set the consumerd state to stopped */ |
1419 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1420 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1421 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1422 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1423 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1424 | } else { | |
1425 | /* Code flow error... */ | |
1426 | assert(0); | |
1427 | } | |
1428 | ||
76d7553f MD |
1429 | if (consumer_data->err_sock >= 0) { |
1430 | ret = close(consumer_data->err_sock); | |
1431 | if (ret) { | |
1432 | PERROR("close"); | |
1433 | } | |
a76cbd9f | 1434 | consumer_data->err_sock = -1; |
76d7553f MD |
1435 | } |
1436 | if (consumer_data->cmd_sock >= 0) { | |
1437 | ret = close(consumer_data->cmd_sock); | |
1438 | if (ret) { | |
1439 | PERROR("close"); | |
1440 | } | |
a76cbd9f | 1441 | consumer_data->cmd_sock = -1; |
76d7553f | 1442 | } |
96544455 SS |
1443 | if (consumer_data->metadata_sock.fd_ptr && |
1444 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1445 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1446 | if (ret) { |
1447 | PERROR("close"); | |
1448 | } | |
1449 | } | |
76d7553f MD |
1450 | if (sock >= 0) { |
1451 | ret = close(sock); | |
1452 | if (ret) { | |
1453 | PERROR("close"); | |
1454 | } | |
1455 | } | |
273ea72c | 1456 | |
3bd1e081 MD |
1457 | unlink(consumer_data->err_unix_sock_path); |
1458 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1459 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1460 | |
fdadac08 | 1461 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1462 | if (consumer_data->metadata_sock.lock) { |
1463 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1464 | free(consumer_data->metadata_sock.lock); | |
1465 | } | |
5eb91c98 | 1466 | lttng_poll_clean(&events); |
b3530820 JG |
1467 | |
1468 | if (cmd_socket_wrapper) { | |
1469 | consumer_destroy_socket(cmd_socket_wrapper); | |
1470 | } | |
76d7553f | 1471 | error_poll: |
139ac872 | 1472 | if (err) { |
840cb59c | 1473 | health_error(); |
139ac872 MD |
1474 | ERR("Health error occurred in %s", __func__); |
1475 | } | |
8782cc74 | 1476 | health_unregister(health_sessiond); |
76d7553f | 1477 | DBG("consumer thread cleanup completed"); |
0177d773 | 1478 | |
34c1e15a MD |
1479 | rcu_thread_offline(); |
1480 | rcu_unregister_thread(); | |
1481 | ||
5eb91c98 | 1482 | return NULL; |
099e26bd DG |
1483 | } |
1484 | ||
099e26bd | 1485 | /* |
81f04d5f JG |
1486 | * This thread receives application command sockets (FDs) on the |
1487 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1488 | * or an error occurs. | |
1489 | * | |
1490 | * At that point, it flushes the data (tracing and metadata) associated | |
1491 | * with this application and tears down ust app sessions and other | |
1492 | * associated data structures through ust_app_unregister(). | |
1493 | * | |
1494 | * Note that this thread never sends commands to the applications | |
1495 | * through the command sockets; it merely listens for hang-ups | |
1496 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1497 | */ |
1498 | static void *thread_manage_apps(void *data) | |
099e26bd | 1499 | { |
139ac872 | 1500 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1501 | ssize_t size_ret; |
5eb91c98 | 1502 | uint32_t revents, nb_fd; |
5eb91c98 | 1503 | struct lttng_poll_event events; |
099e26bd DG |
1504 | |
1505 | DBG("[thread] Manage application started"); | |
1506 | ||
f6a9efaa DG |
1507 | rcu_register_thread(); |
1508 | rcu_thread_online(); | |
1509 | ||
6c71277b | 1510 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1511 | |
e547b070 | 1512 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1513 | goto error_testpoint; |
1514 | } | |
1515 | ||
840cb59c | 1516 | health_code_update(); |
44a5e5eb | 1517 | |
d0b96690 | 1518 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1519 | if (ret < 0) { |
76d7553f | 1520 | goto error_poll_create; |
5eb91c98 | 1521 | } |
099e26bd | 1522 | |
5eb91c98 DG |
1523 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1524 | if (ret < 0) { | |
1525 | goto error; | |
1526 | } | |
099e26bd | 1527 | |
e547b070 | 1528 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1529 | goto error; |
1530 | } | |
8ac94142 | 1531 | |
840cb59c | 1532 | health_code_update(); |
44a5e5eb | 1533 | |
5eb91c98 | 1534 | while (1) { |
7fa2082e | 1535 | DBG("Apps thread polling"); |
099e26bd DG |
1536 | |
1537 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1538 | restart: |
a78af745 | 1539 | health_poll_entry(); |
5eb91c98 | 1540 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1541 | DBG("Apps thread return from poll on %d fds", |
1542 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1543 | health_poll_exit(); |
099e26bd | 1544 | if (ret < 0) { |
88f2b785 MD |
1545 | /* |
1546 | * Restart interrupted system call. | |
1547 | */ | |
1548 | if (errno == EINTR) { | |
1549 | goto restart; | |
1550 | } | |
099e26bd DG |
1551 | goto error; |
1552 | } | |
1553 | ||
0d9c5d77 DG |
1554 | nb_fd = ret; |
1555 | ||
5eb91c98 DG |
1556 | for (i = 0; i < nb_fd; i++) { |
1557 | /* Fetch once the poll data */ | |
1558 | revents = LTTNG_POLL_GETEV(&events, i); | |
1559 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1560 | ||
840cb59c | 1561 | health_code_update(); |
44a5e5eb | 1562 | |
fd20dac9 MD |
1563 | if (!revents) { |
1564 | /* No activity for this FD (poll implementation). */ | |
1565 | continue; | |
1566 | } | |
1567 | ||
5eb91c98 | 1568 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1569 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1570 | if (ret) { |
139ac872 MD |
1571 | err = 0; |
1572 | goto exit; | |
5eb91c98 | 1573 | } |
099e26bd | 1574 | |
5eb91c98 DG |
1575 | /* Inspect the apps cmd pipe */ |
1576 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1577 | if (revents & LPOLLIN) { |
d0b96690 DG |
1578 | int sock; |
1579 | ||
5eb91c98 | 1580 | /* Empty pipe */ |
6cd525e8 MD |
1581 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1582 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1583 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1584 | goto error; |
1585 | } | |
099e26bd | 1586 | |
840cb59c | 1587 | health_code_update(); |
44a5e5eb | 1588 | |
ffe60014 | 1589 | /* |
03e43155 MD |
1590 | * Since this is a command socket (write then read), |
1591 | * we only monitor the error events of the socket. | |
ffe60014 | 1592 | */ |
d0b96690 DG |
1593 | ret = lttng_poll_add(&events, sock, |
1594 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1595 | if (ret < 0) { | |
5eb91c98 | 1596 | goto error; |
e0c7ec2b | 1597 | } |
acc7b41b | 1598 | |
d0b96690 | 1599 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1600 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1601 | ERR("Apps command pipe error"); | |
1602 | goto error; | |
1603 | } else { | |
1604 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1605 | goto error; | |
0177d773 | 1606 | } |
5eb91c98 DG |
1607 | } else { |
1608 | /* | |
54d01ffb DG |
1609 | * At this point, we know that a registered application made |
1610 | * the event at poll_wait. | |
5eb91c98 DG |
1611 | */ |
1612 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1613 | /* Removing from the poll set */ | |
1614 | ret = lttng_poll_del(&events, pollfd); | |
1615 | if (ret < 0) { | |
1616 | goto error; | |
1617 | } | |
099e26bd | 1618 | |
b9d9b220 | 1619 | /* Socket closed on remote end. */ |
56fff090 | 1620 | ust_app_unregister(pollfd); |
03e43155 MD |
1621 | } else { |
1622 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1623 | goto error; | |
5eb91c98 | 1624 | } |
099e26bd | 1625 | } |
44a5e5eb | 1626 | |
840cb59c | 1627 | health_code_update(); |
099e26bd | 1628 | } |
099e26bd DG |
1629 | } |
1630 | ||
139ac872 | 1631 | exit: |
099e26bd | 1632 | error: |
5eb91c98 | 1633 | lttng_poll_clean(&events); |
76d7553f | 1634 | error_poll_create: |
6993eeb3 | 1635 | error_testpoint: |
6620da75 DG |
1636 | utils_close_pipe(apps_cmd_pipe); |
1637 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1638 | ||
1639 | /* | |
1640 | * We don't clean the UST app hash table here since already registered | |
1641 | * applications can still be controlled so let them be until the session | |
1642 | * daemon dies or the applications stop. | |
1643 | */ | |
1644 | ||
139ac872 | 1645 | if (err) { |
840cb59c | 1646 | health_error(); |
139ac872 MD |
1647 | ERR("Health error occurred in %s", __func__); |
1648 | } | |
8782cc74 | 1649 | health_unregister(health_sessiond); |
76d7553f | 1650 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1651 | rcu_thread_offline(); |
1652 | rcu_unregister_thread(); | |
099e26bd DG |
1653 | return NULL; |
1654 | } | |
1655 | ||
d0b96690 | 1656 | /* |
d88aee68 DG |
1657 | * Send a socket to a thread This is called from the dispatch UST registration |
1658 | * thread once all sockets are set for the application. | |
d0b96690 | 1659 | * |
b85dc84c DG |
1660 | * The sock value can be invalid, we don't really care, the thread will handle |
1661 | * it and make the necessary cleanup if so. | |
1662 | * | |
d0b96690 DG |
1663 | * On success, return 0 else a negative value being the errno message of the |
1664 | * write(). | |
1665 | */ | |
d88aee68 | 1666 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1667 | { |
6cd525e8 | 1668 | ssize_t ret; |
d0b96690 | 1669 | |
b85dc84c DG |
1670 | /* |
1671 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1672 | * before calling this function being a shutdown state of the thread. | |
1673 | */ | |
1674 | if (fd < 0) { | |
1675 | ret = -EBADF; | |
1676 | goto error; | |
1677 | } | |
d0b96690 | 1678 | |
6cd525e8 MD |
1679 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1680 | if (ret < sizeof(sock)) { | |
d88aee68 | 1681 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1682 | if (ret < 0) { |
1683 | ret = -errno; | |
1684 | } | |
1685 | goto error; | |
1686 | } | |
1687 | ||
1688 | /* All good. Don't send back the write positive ret value. */ | |
1689 | ret = 0; | |
1690 | error: | |
6cd525e8 | 1691 | return (int) ret; |
d0b96690 DG |
1692 | } |
1693 | ||
f45e313d DG |
1694 | /* |
1695 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1696 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1697 | * notify socket is never received. | |
1698 | */ | |
1699 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1700 | { | |
1701 | int ret, nb_fd = 0, i; | |
1702 | unsigned int fd_added = 0; | |
1703 | struct lttng_poll_event events; | |
1704 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1705 | ||
1706 | assert(wait_queue); | |
1707 | ||
1708 | lttng_poll_init(&events); | |
1709 | ||
1710 | /* Just skip everything for an empty queue. */ | |
1711 | if (!wait_queue->count) { | |
1712 | goto end; | |
1713 | } | |
1714 | ||
1715 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1716 | if (ret < 0) { | |
1717 | goto error_create; | |
1718 | } | |
1719 | ||
1720 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1721 | &wait_queue->head, head) { | |
1722 | assert(wait_node->app); | |
1723 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1724 | LPOLLHUP | LPOLLERR); | |
1725 | if (ret < 0) { | |
1726 | goto error; | |
1727 | } | |
1728 | ||
1729 | fd_added = 1; | |
1730 | } | |
1731 | ||
1732 | if (!fd_added) { | |
1733 | goto end; | |
1734 | } | |
1735 | ||
1736 | /* | |
1737 | * Poll but don't block so we can quickly identify the faulty events and | |
1738 | * clean them afterwards from the wait queue. | |
1739 | */ | |
1740 | ret = lttng_poll_wait(&events, 0); | |
1741 | if (ret < 0) { | |
1742 | goto error; | |
1743 | } | |
1744 | nb_fd = ret; | |
1745 | ||
1746 | for (i = 0; i < nb_fd; i++) { | |
1747 | /* Get faulty FD. */ | |
1748 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1749 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1750 | ||
fd20dac9 MD |
1751 | if (!revents) { |
1752 | /* No activity for this FD (poll implementation). */ | |
1753 | continue; | |
1754 | } | |
1755 | ||
f45e313d DG |
1756 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1757 | &wait_queue->head, head) { | |
1758 | if (pollfd == wait_node->app->sock && | |
1759 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1760 | cds_list_del(&wait_node->head); | |
1761 | wait_queue->count--; | |
1762 | ust_app_destroy(wait_node->app); | |
1763 | free(wait_node); | |
48b40bcf JG |
1764 | /* |
1765 | * Silence warning of use-after-free in | |
1766 | * cds_list_for_each_entry_safe which uses | |
1767 | * __typeof__(*wait_node). | |
1768 | */ | |
1769 | wait_node = NULL; | |
f45e313d | 1770 | break; |
03e43155 MD |
1771 | } else { |
1772 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1773 | goto error; | |
f45e313d DG |
1774 | } |
1775 | } | |
1776 | } | |
1777 | ||
1778 | if (nb_fd > 0) { | |
1779 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1780 | } | |
1781 | ||
1782 | end: | |
1783 | lttng_poll_clean(&events); | |
1784 | return; | |
1785 | ||
1786 | error: | |
1787 | lttng_poll_clean(&events); | |
1788 | error_create: | |
1789 | ERR("Unable to sanitize wait queue"); | |
1790 | return; | |
1791 | } | |
1792 | ||
099e26bd DG |
1793 | /* |
1794 | * Dispatch request from the registration threads to the application | |
1795 | * communication thread. | |
1796 | */ | |
1797 | static void *thread_dispatch_ust_registration(void *data) | |
1798 | { | |
12e2b881 | 1799 | int ret, err = -1; |
8bdee6e2 | 1800 | struct cds_wfcq_node *node; |
099e26bd | 1801 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1802 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1803 | struct ust_reg_wait_queue wait_queue = { | |
1804 | .count = 0, | |
1805 | }; | |
d0b96690 | 1806 | |
967e3668 MD |
1807 | rcu_register_thread(); |
1808 | ||
6c71277b | 1809 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1810 | |
9ad42ec1 MD |
1811 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1812 | goto error_testpoint; | |
1813 | } | |
1814 | ||
12e2b881 MD |
1815 | health_code_update(); |
1816 | ||
f45e313d | 1817 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1818 | |
1819 | DBG("[thread] Dispatch UST command started"); | |
1820 | ||
0ed3b1a8 | 1821 | for (;;) { |
12e2b881 MD |
1822 | health_code_update(); |
1823 | ||
099e26bd DG |
1824 | /* Atomically prepare the queue futex */ |
1825 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1826 | ||
0ed3b1a8 MD |
1827 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1828 | break; | |
1829 | } | |
1830 | ||
099e26bd | 1831 | do { |
d0b96690 | 1832 | struct ust_app *app = NULL; |
7972aab2 | 1833 | ust_cmd = NULL; |
d0b96690 | 1834 | |
f45e313d DG |
1835 | /* |
1836 | * Make sure we don't have node(s) that have hung up before receiving | |
1837 | * the notify socket. This is to clean the list in order to avoid | |
1838 | * memory leaks from notify socket that are never seen. | |
1839 | */ | |
1840 | sanitize_wait_queue(&wait_queue); | |
1841 | ||
12e2b881 | 1842 | health_code_update(); |
099e26bd | 1843 | /* Dequeue command for registration */ |
8bdee6e2 | 1844 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1845 | if (node == NULL) { |
00a17c97 | 1846 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1847 | /* Continue thread execution */ |
1848 | break; | |
1849 | } | |
1850 | ||
1851 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1852 | ||
2f50c8a3 DG |
1853 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1854 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1855 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1856 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1857 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1858 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1859 | |
1860 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1861 | wait_node = zmalloc(sizeof(*wait_node)); | |
1862 | if (!wait_node) { | |
1863 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1864 | ret = close(ust_cmd->sock); |
1865 | if (ret < 0) { | |
1866 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1867 | } | |
51dec90d | 1868 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1869 | free(ust_cmd); |
d0b96690 DG |
1870 | goto error; |
1871 | } | |
1872 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1873 | ||
1874 | /* Create application object if socket is CMD. */ | |
1875 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1876 | ust_cmd->sock); | |
1877 | if (!wait_node->app) { | |
1878 | ret = close(ust_cmd->sock); | |
1879 | if (ret < 0) { | |
1880 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1881 | } |
51dec90d | 1882 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1883 | free(wait_node); |
7972aab2 | 1884 | free(ust_cmd); |
d0b96690 DG |
1885 | continue; |
1886 | } | |
1887 | /* | |
1888 | * Add application to the wait queue so we can set the notify | |
1889 | * socket before putting this object in the global ht. | |
1890 | */ | |
f45e313d DG |
1891 | cds_list_add(&wait_node->head, &wait_queue.head); |
1892 | wait_queue.count++; | |
d0b96690 | 1893 | |
7972aab2 | 1894 | free(ust_cmd); |
d0b96690 DG |
1895 | /* |
1896 | * We have to continue here since we don't have the notify | |
1897 | * socket and the application MUST be added to the hash table | |
1898 | * only at that moment. | |
1899 | */ | |
1900 | continue; | |
1901 | } else { | |
1902 | /* | |
1903 | * Look for the application in the local wait queue and set the | |
1904 | * notify socket if found. | |
1905 | */ | |
d88aee68 | 1906 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1907 | &wait_queue.head, head) { |
12e2b881 | 1908 | health_code_update(); |
d0b96690 DG |
1909 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1910 | wait_node->app->notify_sock = ust_cmd->sock; | |
1911 | cds_list_del(&wait_node->head); | |
f45e313d | 1912 | wait_queue.count--; |
d0b96690 DG |
1913 | app = wait_node->app; |
1914 | free(wait_node); | |
1915 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1916 | break; | |
1917 | } | |
1918 | } | |
020d7f60 DG |
1919 | |
1920 | /* | |
1921 | * With no application at this stage the received socket is | |
1922 | * basically useless so close it before we free the cmd data | |
1923 | * structure for good. | |
1924 | */ | |
1925 | if (!app) { | |
1926 | ret = close(ust_cmd->sock); | |
1927 | if (ret < 0) { | |
1928 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1929 | } | |
51dec90d | 1930 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1931 | } |
7972aab2 | 1932 | free(ust_cmd); |
d0b96690 DG |
1933 | } |
1934 | ||
1935 | if (app) { | |
d0b96690 DG |
1936 | /* |
1937 | * @session_lock_list | |
1938 | * | |
1939 | * Lock the global session list so from the register up to the | |
1940 | * registration done message, no thread can see the application | |
1941 | * and change its state. | |
1942 | */ | |
1943 | session_lock_list(); | |
1944 | rcu_read_lock(); | |
d88aee68 | 1945 | |
d0b96690 DG |
1946 | /* |
1947 | * Add application to the global hash table. This needs to be | |
1948 | * done before the update to the UST registry can locate the | |
1949 | * application. | |
1950 | */ | |
1951 | ust_app_add(app); | |
d88aee68 DG |
1952 | |
1953 | /* Set app version. This call will print an error if needed. */ | |
1954 | (void) ust_app_version(app); | |
1955 | ||
1956 | /* Send notify socket through the notify pipe. */ | |
1957 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1958 | app->notify_sock); | |
1959 | if (ret < 0) { | |
1960 | rcu_read_unlock(); | |
1961 | session_unlock_list(); | |
b85dc84c DG |
1962 | /* |
1963 | * No notify thread, stop the UST tracing. However, this is | |
1964 | * not an internal error of the this thread thus setting | |
1965 | * the health error code to a normal exit. | |
1966 | */ | |
1967 | err = 0; | |
d88aee68 | 1968 | goto error; |
6620da75 | 1969 | } |
d88aee68 | 1970 | |
d0b96690 DG |
1971 | /* |
1972 | * Update newly registered application with the tracing | |
1973 | * registry info already enabled information. | |
1974 | */ | |
1975 | update_ust_app(app->sock); | |
d88aee68 DG |
1976 | |
1977 | /* | |
1978 | * Don't care about return value. Let the manage apps threads | |
1979 | * handle app unregistration upon socket close. | |
1980 | */ | |
fb45065e | 1981 | (void) ust_app_register_done(app); |
d88aee68 DG |
1982 | |
1983 | /* | |
1984 | * Even if the application socket has been closed, send the app | |
1985 | * to the thread and unregistration will take place at that | |
1986 | * place. | |
1987 | */ | |
1988 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1989 | if (ret < 0) { |
d88aee68 DG |
1990 | rcu_read_unlock(); |
1991 | session_unlock_list(); | |
b85dc84c DG |
1992 | /* |
1993 | * No apps. thread, stop the UST tracing. However, this is | |
1994 | * not an internal error of the this thread thus setting | |
1995 | * the health error code to a normal exit. | |
1996 | */ | |
1997 | err = 0; | |
d88aee68 | 1998 | goto error; |
d0b96690 | 1999 | } |
d88aee68 | 2000 | |
d0b96690 DG |
2001 | rcu_read_unlock(); |
2002 | session_unlock_list(); | |
099e26bd | 2003 | } |
099e26bd DG |
2004 | } while (node != NULL); |
2005 | ||
12e2b881 | 2006 | health_poll_entry(); |
099e26bd DG |
2007 | /* Futex wait on queue. Blocking call on futex() */ |
2008 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2009 | health_poll_exit(); |
099e26bd | 2010 | } |
12e2b881 MD |
2011 | /* Normal exit, no error */ |
2012 | err = 0; | |
099e26bd DG |
2013 | |
2014 | error: | |
d88aee68 DG |
2015 | /* Clean up wait queue. */ |
2016 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2017 | &wait_queue.head, head) { |
d88aee68 | 2018 | cds_list_del(&wait_node->head); |
f45e313d | 2019 | wait_queue.count--; |
d88aee68 DG |
2020 | free(wait_node); |
2021 | } | |
2022 | ||
772b8f4d MD |
2023 | /* Empty command queue. */ |
2024 | for (;;) { | |
2025 | /* Dequeue command for registration */ | |
2026 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2027 | if (node == NULL) { | |
2028 | break; | |
2029 | } | |
2030 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2031 | ret = close(ust_cmd->sock); | |
2032 | if (ret < 0) { | |
2033 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2034 | } | |
2035 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2036 | free(ust_cmd); | |
2037 | } | |
2038 | ||
9ad42ec1 | 2039 | error_testpoint: |
099e26bd | 2040 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2041 | if (err) { |
2042 | health_error(); | |
2043 | ERR("Health error occurred in %s", __func__); | |
2044 | } | |
8782cc74 | 2045 | health_unregister(health_sessiond); |
967e3668 | 2046 | rcu_unregister_thread(); |
099e26bd DG |
2047 | return NULL; |
2048 | } | |
2049 | ||
2050 | /* | |
2051 | * This thread manage application registration. | |
2052 | */ | |
2053 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2054 | { |
139ac872 | 2055 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2056 | uint32_t revents, nb_fd; |
2057 | struct lttng_poll_event events; | |
099e26bd DG |
2058 | /* |
2059 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2060 | * freed in the manage apps thread. | |
2061 | */ | |
2062 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2063 | |
099e26bd | 2064 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2065 | |
6c71277b | 2066 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2067 | |
e547b070 | 2068 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2069 | goto error_testpoint; |
2070 | } | |
8ac94142 | 2071 | |
1d4b027a DG |
2072 | ret = lttcomm_listen_unix_sock(apps_sock); |
2073 | if (ret < 0) { | |
76d7553f | 2074 | goto error_listen; |
1d4b027a DG |
2075 | } |
2076 | ||
5eb91c98 DG |
2077 | /* |
2078 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2079 | * more will be added to this poll set. | |
2080 | */ | |
d0b96690 | 2081 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2082 | if (ret < 0) { |
76d7553f | 2083 | goto error_create_poll; |
5eb91c98 | 2084 | } |
273ea72c | 2085 | |
5eb91c98 DG |
2086 | /* Add the application registration socket */ |
2087 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2088 | if (ret < 0) { | |
76d7553f | 2089 | goto error_poll_add; |
5eb91c98 | 2090 | } |
273ea72c | 2091 | |
1d4b027a | 2092 | /* Notify all applications to register */ |
0fdd1e2c DG |
2093 | ret = notify_ust_apps(1); |
2094 | if (ret < 0) { | |
2095 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2096 | "Execution continues but there might be problem for already\n" |
2097 | "running applications that wishes to register."); | |
0fdd1e2c | 2098 | } |
1d4b027a DG |
2099 | |
2100 | while (1) { | |
2101 | DBG("Accepting application registration"); | |
273ea72c DG |
2102 | |
2103 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2104 | restart: |
a78af745 | 2105 | health_poll_entry(); |
5eb91c98 | 2106 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2107 | health_poll_exit(); |
273ea72c | 2108 | if (ret < 0) { |
88f2b785 MD |
2109 | /* |
2110 | * Restart interrupted system call. | |
2111 | */ | |
2112 | if (errno == EINTR) { | |
2113 | goto restart; | |
2114 | } | |
273ea72c DG |
2115 | goto error; |
2116 | } | |
2117 | ||
0d9c5d77 DG |
2118 | nb_fd = ret; |
2119 | ||
5eb91c98 | 2120 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2121 | health_code_update(); |
139ac872 | 2122 | |
5eb91c98 DG |
2123 | /* Fetch once the poll data */ |
2124 | revents = LTTNG_POLL_GETEV(&events, i); | |
2125 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2126 | |
fd20dac9 MD |
2127 | if (!revents) { |
2128 | /* No activity for this FD (poll implementation). */ | |
2129 | continue; | |
2130 | } | |
2131 | ||
5eb91c98 | 2132 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2133 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2134 | if (ret) { |
139ac872 MD |
2135 | err = 0; |
2136 | goto exit; | |
90014c57 | 2137 | } |
1d4b027a | 2138 | |
5eb91c98 DG |
2139 | /* Event on the registration socket */ |
2140 | if (pollfd == apps_sock) { | |
03e43155 | 2141 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2142 | sock = lttcomm_accept_unix_sock(apps_sock); |
2143 | if (sock < 0) { | |
2144 | goto error; | |
2145 | } | |
099e26bd | 2146 | |
16c5c8fa DG |
2147 | /* |
2148 | * Set socket timeout for both receiving and ending. | |
2149 | * app_socket_timeout is in seconds, whereas | |
2150 | * lttcomm_setsockopt_rcv_timeout and | |
2151 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2152 | * parameter. | |
2153 | */ | |
e6142f2e | 2154 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2155 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2156 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2157 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2158 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2159 | } |
16c5c8fa | 2160 | |
b662582b DG |
2161 | /* |
2162 | * Set the CLOEXEC flag. Return code is useless because | |
2163 | * either way, the show must go on. | |
2164 | */ | |
2165 | (void) utils_set_fd_cloexec(sock); | |
2166 | ||
5eb91c98 | 2167 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2168 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2169 | if (ust_cmd == NULL) { |
76d7553f | 2170 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2171 | ret = close(sock); |
2172 | if (ret) { | |
2173 | PERROR("close"); | |
2174 | } | |
5eb91c98 DG |
2175 | goto error; |
2176 | } | |
1d4b027a | 2177 | |
5eb91c98 DG |
2178 | /* |
2179 | * Using message-based transmissions to ensure we don't | |
2180 | * have to deal with partially received messages. | |
2181 | */ | |
4063050c MD |
2182 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2183 | if (ret < 0) { | |
2184 | ERR("Exhausted file descriptors allowed for applications."); | |
2185 | free(ust_cmd); | |
2186 | ret = close(sock); | |
2187 | if (ret) { | |
2188 | PERROR("close"); | |
2189 | } | |
2190 | sock = -1; | |
2191 | continue; | |
2192 | } | |
d88aee68 | 2193 | |
840cb59c | 2194 | health_code_update(); |
d0b96690 DG |
2195 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2196 | if (ret < 0) { | |
5eb91c98 | 2197 | free(ust_cmd); |
d0b96690 | 2198 | /* Close socket of the application. */ |
76d7553f MD |
2199 | ret = close(sock); |
2200 | if (ret) { | |
2201 | PERROR("close"); | |
2202 | } | |
4063050c | 2203 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2204 | sock = -1; |
5eb91c98 DG |
2205 | continue; |
2206 | } | |
840cb59c | 2207 | health_code_update(); |
099e26bd | 2208 | |
5eb91c98 | 2209 | ust_cmd->sock = sock; |
34a2494f | 2210 | sock = -1; |
099e26bd | 2211 | |
5eb91c98 DG |
2212 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2213 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2214 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2215 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2216 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2217 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2218 | |
5eb91c98 DG |
2219 | /* |
2220 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2221 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2222 | */ |
8bdee6e2 | 2223 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2224 | |
2225 | /* | |
2226 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2227 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2228 | */ |
2229 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2230 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2231 | ERR("Register apps socket poll error"); | |
2232 | goto error; | |
2233 | } else { | |
2234 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2235 | goto error; | |
5eb91c98 DG |
2236 | } |
2237 | } | |
90014c57 | 2238 | } |
1d4b027a DG |
2239 | } |
2240 | ||
139ac872 | 2241 | exit: |
1d4b027a | 2242 | error: |
0fdd1e2c DG |
2243 | /* Notify that the registration thread is gone */ |
2244 | notify_ust_apps(0); | |
2245 | ||
a4b35e07 | 2246 | if (apps_sock >= 0) { |
76d7553f MD |
2247 | ret = close(apps_sock); |
2248 | if (ret) { | |
2249 | PERROR("close"); | |
2250 | } | |
a4b35e07 | 2251 | } |
46c3f085 | 2252 | if (sock >= 0) { |
76d7553f MD |
2253 | ret = close(sock); |
2254 | if (ret) { | |
2255 | PERROR("close"); | |
2256 | } | |
4063050c | 2257 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2258 | } |
e6142f2e | 2259 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2260 | |
76d7553f | 2261 | error_poll_add: |
5eb91c98 | 2262 | lttng_poll_clean(&events); |
76d7553f MD |
2263 | error_listen: |
2264 | error_create_poll: | |
6993eeb3 | 2265 | error_testpoint: |
76d7553f | 2266 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2267 | if (err) { |
2268 | health_error(); | |
2269 | ERR("Health error occurred in %s", __func__); | |
2270 | } | |
8782cc74 | 2271 | health_unregister(health_sessiond); |
5eb91c98 | 2272 | |
1d4b027a DG |
2273 | return NULL; |
2274 | } | |
2275 | ||
8c0faa1d | 2276 | /* |
3bd1e081 | 2277 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2278 | * exec or it will fails. |
8c0faa1d | 2279 | */ |
3bd1e081 | 2280 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2281 | { |
a23ec3a7 | 2282 | int ret, clock_ret; |
ee0b0061 DG |
2283 | struct timespec timeout; |
2284 | ||
13a7bce3 JG |
2285 | /* |
2286 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2287 | * This access to consumer_thread_is_ready does not need to be | |
2288 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2289 | * management thread has not been started at this point. | |
2290 | */ | |
a23ec3a7 | 2291 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2292 | |
a23ec3a7 DG |
2293 | /* Setup pthread condition */ |
2294 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2295 | if (ret) { |
a23ec3a7 DG |
2296 | errno = ret; |
2297 | PERROR("pthread_condattr_init consumer data"); | |
2298 | goto error; | |
2299 | } | |
2300 | ||
2301 | /* | |
2302 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2303 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2304 | * for a more details and how we noticed it. | |
2305 | */ | |
2306 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2307 | if (ret) { |
a23ec3a7 DG |
2308 | errno = ret; |
2309 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2310 | goto error; |
2311 | } | |
8c0faa1d | 2312 | |
a23ec3a7 | 2313 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2314 | if (ret) { |
a23ec3a7 DG |
2315 | errno = ret; |
2316 | PERROR("pthread_cond_init consumer data"); | |
2317 | goto error; | |
2318 | } | |
2319 | ||
1a1a34b4 MJ |
2320 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2321 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2322 | if (ret) { |
2323 | errno = ret; | |
3bd1e081 | 2324 | PERROR("pthread_create consumer"); |
ee0b0061 | 2325 | ret = -1; |
8c0faa1d DG |
2326 | goto error; |
2327 | } | |
2328 | ||
a23ec3a7 DG |
2329 | /* We are about to wait on a pthread condition */ |
2330 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2331 | ||
ee0b0061 | 2332 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2333 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2334 | /* |
2335 | * Set the timeout for the condition timed wait even if the clock gettime | |
2336 | * call fails since we might loop on that call and we want to avoid to | |
2337 | * increment the timeout too many times. | |
2338 | */ | |
2339 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2340 | ||
2341 | /* | |
2342 | * The following loop COULD be skipped in some conditions so this is why we | |
2343 | * set ret to 0 in order to make sure at least one round of the loop is | |
2344 | * done. | |
2345 | */ | |
2346 | ret = 0; | |
2347 | ||
2348 | /* | |
2349 | * Loop until the condition is reached or when a timeout is reached. Note | |
2350 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2351 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2352 | * possible. This loop does not take any chances and works with both of | |
2353 | * them. | |
2354 | */ | |
2355 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2356 | if (clock_ret < 0) { | |
2357 | PERROR("clock_gettime spawn consumer"); | |
2358 | /* Infinite wait for the consumerd thread to be ready */ | |
2359 | ret = pthread_cond_wait(&consumer_data->cond, | |
2360 | &consumer_data->cond_mutex); | |
2361 | } else { | |
2362 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2363 | &consumer_data->cond_mutex, &timeout); | |
2364 | } | |
ee0b0061 | 2365 | } |
8c0faa1d | 2366 | |
a23ec3a7 DG |
2367 | /* Release the pthread condition */ |
2368 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2369 | ||
2370 | if (ret != 0) { | |
2371 | errno = ret; | |
2372 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2373 | int pth_ret; |
2374 | ||
ee0b0061 DG |
2375 | /* |
2376 | * Call has timed out so we kill the kconsumerd_thread and return | |
2377 | * an error. | |
2378 | */ | |
a23ec3a7 DG |
2379 | ERR("Condition timed out. The consumer thread was never ready." |
2380 | " Killing it"); | |
4282f9a3 DG |
2381 | pth_ret = pthread_cancel(consumer_data->thread); |
2382 | if (pth_ret < 0) { | |
3bd1e081 | 2383 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2384 | } |
2385 | } else { | |
a23ec3a7 | 2386 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2387 | } |
4282f9a3 DG |
2388 | /* Caller is expecting a negative value on failure. */ |
2389 | ret = -1; | |
ee0b0061 DG |
2390 | goto error; |
2391 | } | |
2392 | ||
3bd1e081 MD |
2393 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2394 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2395 | ERR("Consumerd did not start"); |
3bd1e081 | 2396 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2397 | goto error; |
2398 | } | |
3bd1e081 | 2399 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2400 | |
8c0faa1d DG |
2401 | return 0; |
2402 | ||
2403 | error: | |
2404 | return ret; | |
2405 | } | |
2406 | ||
d9800920 | 2407 | /* |
3bd1e081 | 2408 | * Join consumer thread |
d9800920 | 2409 | */ |
3bd1e081 | 2410 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2411 | { |
2412 | void *status; | |
cf3af59e | 2413 | |
e8209f6b DG |
2414 | /* Consumer pid must be a real one. */ |
2415 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2416 | int ret; |
3bd1e081 | 2417 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2418 | if (ret) { |
4a15001e | 2419 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2420 | return ret; |
2421 | } | |
3bd1e081 | 2422 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2423 | } else { |
2424 | return 0; | |
2425 | } | |
2426 | } | |
2427 | ||
8c0faa1d | 2428 | /* |
3bd1e081 | 2429 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2430 | * |
d063d709 | 2431 | * Return pid if successful else -1. |
8c0faa1d | 2432 | */ |
3bd1e081 | 2433 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2434 | { |
2435 | int ret; | |
2436 | pid_t pid; | |
94c55f17 | 2437 | const char *consumer_to_use; |
53086306 | 2438 | const char *verbosity; |
94c55f17 | 2439 | struct stat st; |
8c0faa1d | 2440 | |
3bd1e081 | 2441 | DBG("Spawning consumerd"); |
c49dc785 | 2442 | |
8c0faa1d DG |
2443 | pid = fork(); |
2444 | if (pid == 0) { | |
2445 | /* | |
3bd1e081 | 2446 | * Exec consumerd. |
8c0faa1d | 2447 | */ |
e6142f2e | 2448 | if (config.verbose_consumer) { |
53086306 | 2449 | verbosity = "--verbose"; |
4421f712 | 2450 | } else if (lttng_opt_quiet) { |
53086306 | 2451 | verbosity = "--quiet"; |
4421f712 DG |
2452 | } else { |
2453 | verbosity = ""; | |
53086306 | 2454 | } |
4421f712 | 2455 | |
3bd1e081 MD |
2456 | switch (consumer_data->type) { |
2457 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2458 | /* |
c7704d57 DG |
2459 | * Find out which consumerd to execute. We will first try the |
2460 | * 64-bit path, then the sessiond's installation directory, and | |
2461 | * fallback on the 32-bit one, | |
94c55f17 | 2462 | */ |
63a799e8 | 2463 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2464 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2465 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2466 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2467 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2468 | DBG3("Found location #1"); |
e6142f2e JG |
2469 | consumer_to_use = config.consumerd64_bin_path.value; |
2470 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2471 | DBG3("Found location #2"); |
e6142f2e JG |
2472 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
2473 | } else if (stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2474 | DBG3("Found location #3"); |
e6142f2e | 2475 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2476 | } else { |
63a799e8 | 2477 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2478 | ret = -EINVAL; |
3d678709 | 2479 | goto error; |
94c55f17 AM |
2480 | } |
2481 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2482 | (void) execl(consumer_to_use, |
94c55f17 AM |
2483 | "lttng-consumerd", verbosity, "-k", |
2484 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2485 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2486 | "--group", config.tracing_group_name.value, |
94c55f17 | 2487 | NULL); |
3bd1e081 | 2488 | break; |
7753dea8 MD |
2489 | case LTTNG_CONSUMER64_UST: |
2490 | { | |
46b23495 | 2491 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2492 | char *tmp; |
2493 | size_t tmplen; | |
ddaec4a2 | 2494 | char *tmpnew; |
8f4905da | 2495 | |
e8fa9fb0 | 2496 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2497 | if (!tmp) { |
2498 | tmp = ""; | |
2499 | } | |
d222983e | 2500 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2501 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2502 | if (!tmpnew) { | |
2503 | ret = -ENOMEM; | |
2504 | goto error; | |
2505 | } | |
e6142f2e | 2506 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2507 | if (tmp[0] != '\0') { |
2508 | strcat(tmpnew, ":"); | |
2509 | strcat(tmpnew, tmp); | |
2510 | } | |
d222983e | 2511 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2512 | free(tmpnew); |
8f4905da MD |
2513 | if (ret) { |
2514 | ret = -errno; | |
2515 | goto error; | |
2516 | } | |
2517 | } | |
e6142f2e JG |
2518 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2519 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2520 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2521 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2522 | "--group", config.tracing_group_name.value, |
7753dea8 | 2523 | NULL); |
3bd1e081 | 2524 | break; |
7753dea8 MD |
2525 | } |
2526 | case LTTNG_CONSUMER32_UST: | |
2527 | { | |
46b23495 | 2528 | if (config.consumerd32_lib_dir.value) { |
8f4905da MD |
2529 | char *tmp; |
2530 | size_t tmplen; | |
ddaec4a2 | 2531 | char *tmpnew; |
8f4905da | 2532 | |
e8fa9fb0 | 2533 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2534 | if (!tmp) { |
2535 | tmp = ""; | |
2536 | } | |
d222983e | 2537 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2538 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2539 | if (!tmpnew) { | |
2540 | ret = -ENOMEM; | |
2541 | goto error; | |
2542 | } | |
e6142f2e | 2543 | strcat(tmpnew, config.consumerd32_lib_dir.value); |
8f4905da MD |
2544 | if (tmp[0] != '\0') { |
2545 | strcat(tmpnew, ":"); | |
2546 | strcat(tmpnew, tmp); | |
2547 | } | |
d222983e | 2548 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2549 | free(tmpnew); |
8f4905da MD |
2550 | if (ret) { |
2551 | ret = -errno; | |
2552 | goto error; | |
2553 | } | |
2554 | } | |
e6142f2e JG |
2555 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2556 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2557 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2558 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2559 | "--group", config.tracing_group_name.value, |
7753dea8 MD |
2560 | NULL); |
2561 | break; | |
2562 | } | |
3bd1e081 | 2563 | default: |
b60e7183 | 2564 | ERR("unknown consumer type"); |
e9d6b496 | 2565 | errno = 0; |
3bd1e081 | 2566 | } |
8c0faa1d | 2567 | if (errno != 0) { |
4282f9a3 | 2568 | PERROR("Consumer execl()"); |
8c0faa1d | 2569 | } |
4282f9a3 | 2570 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2571 | exit(EXIT_FAILURE); |
2572 | } else if (pid > 0) { | |
2573 | ret = pid; | |
8c0faa1d | 2574 | } else { |
76d7553f | 2575 | PERROR("start consumer fork"); |
8c0faa1d | 2576 | ret = -errno; |
8c0faa1d | 2577 | } |
8f4905da | 2578 | error: |
8c0faa1d DG |
2579 | return ret; |
2580 | } | |
2581 | ||
693bd40b | 2582 | /* |
3bd1e081 | 2583 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2584 | */ |
3bd1e081 | 2585 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2586 | { |
c617c0c6 | 2587 | int ret; |
edb8b045 DG |
2588 | |
2589 | /* | |
2590 | * Set the listen() state on the socket since there is a possible race | |
2591 | * between the exec() of the consumer daemon and this call if place in the | |
2592 | * consumer thread. See bug #366 for more details. | |
2593 | */ | |
2594 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2595 | if (ret < 0) { | |
2596 | goto error; | |
2597 | } | |
693bd40b | 2598 | |
3bd1e081 MD |
2599 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2600 | if (consumer_data->pid != 0) { | |
2601 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2602 | goto end; |
2603 | } | |
693bd40b | 2604 | |
3bd1e081 | 2605 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2606 | if (ret < 0) { |
3bd1e081 MD |
2607 | ERR("Spawning consumerd failed"); |
2608 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2609 | goto error; |
693bd40b | 2610 | } |
c49dc785 | 2611 | |
3bd1e081 MD |
2612 | /* Setting up the consumer_data pid */ |
2613 | consumer_data->pid = ret; | |
48842b30 | 2614 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2615 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2616 | |
3bd1e081 MD |
2617 | DBG2("Spawning consumer control thread"); |
2618 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2619 | if (ret < 0) { |
3bd1e081 | 2620 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2621 | goto error; |
2622 | } | |
2623 | ||
c49dc785 | 2624 | end: |
693bd40b DG |
2625 | return 0; |
2626 | ||
2627 | error: | |
331744e3 | 2628 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2629 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2630 | int err; |
2631 | ||
edb8b045 DG |
2632 | err = close(consumer_data->err_sock); |
2633 | if (err < 0) { | |
2634 | PERROR("close consumer data error socket"); | |
2635 | } | |
2636 | } | |
693bd40b DG |
2637 | return ret; |
2638 | } | |
2639 | ||
b73401da | 2640 | /* |
096102bd | 2641 | * Setup necessary data for kernel tracer action. |
b73401da | 2642 | */ |
096102bd | 2643 | static int init_kernel_tracer(void) |
b73401da DG |
2644 | { |
2645 | int ret; | |
b73401da | 2646 | |
096102bd DG |
2647 | /* Modprobe lttng kernel modules */ |
2648 | ret = modprobe_lttng_control(); | |
b73401da | 2649 | if (ret < 0) { |
b73401da DG |
2650 | goto error; |
2651 | } | |
2652 | ||
096102bd DG |
2653 | /* Open debugfs lttng */ |
2654 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2655 | if (kernel_tracer_fd < 0) { | |
2656 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2657 | goto error_open; |
54d01ffb DG |
2658 | } |
2659 | ||
2f77fc4b | 2660 | /* Validate kernel version */ |
88076e89 JD |
2661 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2662 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2663 | if (ret < 0) { |
2664 | goto error_version; | |
b551a063 | 2665 | } |
54d01ffb | 2666 | |
2f77fc4b DG |
2667 | ret = modprobe_lttng_data(); |
2668 | if (ret < 0) { | |
2669 | goto error_modules; | |
54d01ffb DG |
2670 | } |
2671 | ||
6e21424e JR |
2672 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2673 | kernel_tracer_fd); | |
2674 | if (ret < 0) { | |
2675 | goto error_modules; | |
2676 | } | |
2677 | ||
2678 | if (ret < 1) { | |
2679 | WARN("Kernel tracer does not support buffer monitoring. " | |
2680 | "The monitoring timer of channels in the kernel domain " | |
2681 | "will be set to 0 (disabled)."); | |
2682 | } | |
2683 | ||
2f77fc4b DG |
2684 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2685 | return 0; | |
2686 | ||
2687 | error_version: | |
2688 | modprobe_remove_lttng_control(); | |
2689 | ret = close(kernel_tracer_fd); | |
2690 | if (ret) { | |
2691 | PERROR("close"); | |
b551a063 | 2692 | } |
2f77fc4b | 2693 | kernel_tracer_fd = -1; |
f73fabfd | 2694 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2695 | |
2f77fc4b DG |
2696 | error_modules: |
2697 | ret = close(kernel_tracer_fd); | |
2698 | if (ret) { | |
2699 | PERROR("close"); | |
b551a063 | 2700 | } |
54d01ffb | 2701 | |
2f77fc4b DG |
2702 | error_open: |
2703 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2704 | |
2705 | error: | |
2f77fc4b DG |
2706 | WARN("No kernel tracer available"); |
2707 | kernel_tracer_fd = -1; | |
2708 | if (!is_root) { | |
f73fabfd | 2709 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2710 | } else { |
f73fabfd | 2711 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2712 | } |
54d01ffb DG |
2713 | } |
2714 | ||
2f77fc4b | 2715 | |
54d01ffb | 2716 | /* |
2f77fc4b DG |
2717 | * Copy consumer output from the tracing session to the domain session. The |
2718 | * function also applies the right modification on a per domain basis for the | |
2719 | * trace files destination directory. | |
36b588ed MD |
2720 | * |
2721 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2722 | */ |
2f77fc4b | 2723 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2724 | { |
2725 | int ret; | |
2f77fc4b DG |
2726 | const char *dir_name; |
2727 | struct consumer_output *consumer; | |
2728 | ||
2729 | assert(session); | |
2730 | assert(session->consumer); | |
54d01ffb | 2731 | |
b551a063 DG |
2732 | switch (domain) { |
2733 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2734 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2735 | /* |
2736 | * XXX: We should audit the session creation and what this function | |
2737 | * does "extra" in order to avoid a destroy since this function is used | |
2738 | * in the domain session creation (kernel and ust) only. Same for UST | |
2739 | * domain. | |
2740 | */ | |
2741 | if (session->kernel_session->consumer) { | |
6addfa37 | 2742 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2743 | } |
2f77fc4b DG |
2744 | session->kernel_session->consumer = |
2745 | consumer_copy_output(session->consumer); | |
2746 | /* Ease our life a bit for the next part */ | |
2747 | consumer = session->kernel_session->consumer; | |
2748 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2749 | break; |
f20baf8e | 2750 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2751 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2752 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2753 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2754 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2755 | if (session->ust_session->consumer) { |
6addfa37 | 2756 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2757 | } |
2f77fc4b DG |
2758 | session->ust_session->consumer = |
2759 | consumer_copy_output(session->consumer); | |
2760 | /* Ease our life a bit for the next part */ | |
2761 | consumer = session->ust_session->consumer; | |
2762 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2763 | break; |
2764 | default: | |
f73fabfd | 2765 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2766 | goto error; |
2767 | } | |
2768 | ||
2f77fc4b | 2769 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2770 | strncat(consumer->subdir, dir_name, |
2771 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2772 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2773 | ||
f73fabfd | 2774 | ret = LTTNG_OK; |
54d01ffb DG |
2775 | |
2776 | error: | |
2777 | return ret; | |
2778 | } | |
2779 | ||
00e2e675 | 2780 | /* |
2f77fc4b | 2781 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2782 | * |
2783 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2784 | */ |
2f77fc4b DG |
2785 | static int create_ust_session(struct ltt_session *session, |
2786 | struct lttng_domain *domain) | |
00e2e675 DG |
2787 | { |
2788 | int ret; | |
2f77fc4b | 2789 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2790 | |
a4b92340 | 2791 | assert(session); |
2f77fc4b DG |
2792 | assert(domain); |
2793 | assert(session->consumer); | |
a4b92340 | 2794 | |
2f77fc4b | 2795 | switch (domain->type) { |
f20baf8e | 2796 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2797 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2798 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2799 | case LTTNG_DOMAIN_UST: |
2800 | break; | |
2801 | default: | |
2802 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2803 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2804 | goto error; |
2805 | } | |
2806 | ||
2f77fc4b DG |
2807 | DBG("Creating UST session"); |
2808 | ||
dec56f6c | 2809 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2810 | if (lus == NULL) { |
f73fabfd | 2811 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2812 | goto error; |
2813 | } | |
2814 | ||
2f77fc4b DG |
2815 | lus->uid = session->uid; |
2816 | lus->gid = session->gid; | |
2bba9e53 | 2817 | lus->output_traces = session->output_traces; |
27babd3a | 2818 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2819 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2820 | session->ust_session = lus; |
d7ba1388 | 2821 | if (session->shm_path[0]) { |
3d071855 MD |
2822 | strncpy(lus->root_shm_path, session->shm_path, |
2823 | sizeof(lus->root_shm_path)); | |
2824 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2825 | strncpy(lus->shm_path, session->shm_path, |
2826 | sizeof(lus->shm_path)); | |
2827 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2828 | strncat(lus->shm_path, "/ust", | |
2829 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2830 | } | |
2f77fc4b DG |
2831 | /* Copy session output to the newly created UST session */ |
2832 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2833 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2834 | goto error; |
2835 | } | |
2836 | ||
f73fabfd | 2837 | return LTTNG_OK; |
00e2e675 DG |
2838 | |
2839 | error: | |
2f77fc4b DG |
2840 | free(lus); |
2841 | session->ust_session = NULL; | |
00e2e675 DG |
2842 | return ret; |
2843 | } | |
2844 | ||
2845 | /* | |
2f77fc4b | 2846 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2847 | */ |
2f77fc4b | 2848 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2849 | { |
2850 | int ret; | |
a4b92340 | 2851 | |
2f77fc4b | 2852 | DBG("Creating kernel session"); |
00e2e675 | 2853 | |
2f77fc4b DG |
2854 | ret = kernel_create_session(session, kernel_tracer_fd); |
2855 | if (ret < 0) { | |
f73fabfd | 2856 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2857 | goto error; |
2858 | } | |
2859 | ||
2f77fc4b DG |
2860 | /* Code flow safety */ |
2861 | assert(session->kernel_session); | |
2862 | ||
2863 | /* Copy session output to the newly created Kernel session */ | |
2864 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2865 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2866 | goto error; |
2867 | } | |
2868 | ||
2f77fc4b DG |
2869 | session->kernel_session->uid = session->uid; |
2870 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2871 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2872 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2873 | |
f73fabfd | 2874 | return LTTNG_OK; |
00e2e675 | 2875 | |
2f77fc4b DG |
2876 | error: |
2877 | trace_kernel_destroy_session(session->kernel_session); | |
2878 | session->kernel_session = NULL; | |
2879 | return ret; | |
2880 | } | |
00e2e675 | 2881 | |
2f77fc4b DG |
2882 | /* |
2883 | * Count number of session permitted by uid/gid. | |
2884 | */ | |
2885 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2886 | { | |
2887 | unsigned int i = 0; | |
2888 | struct ltt_session *session; | |
07424f16 | 2889 | |
2f77fc4b DG |
2890 | DBG("Counting number of available session for UID %d GID %d", |
2891 | uid, gid); | |
2892 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2893 | /* |
2f77fc4b | 2894 | * Only list the sessions the user can control. |
00e2e675 | 2895 | */ |
2f77fc4b DG |
2896 | if (!session_access_ok(session, uid, gid)) { |
2897 | continue; | |
2898 | } | |
2899 | i++; | |
a4b92340 | 2900 | } |
2f77fc4b | 2901 | return i; |
00e2e675 DG |
2902 | } |
2903 | ||
54d01ffb DG |
2904 | /* |
2905 | * Process the command requested by the lttng client within the command | |
2906 | * context structure. This function make sure that the return structure (llm) | |
2907 | * is set and ready for transmission before returning. | |
2908 | * | |
2909 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2910 | * |
2911 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2912 | * |
2913 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2914 | */ |
53a80697 MD |
2915 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2916 | int *sock_error) | |
54d01ffb | 2917 | { |
f73fabfd | 2918 | int ret = LTTNG_OK; |
44d3bd01 | 2919 | int need_tracing_session = 1; |
2e09ba09 | 2920 | int need_domain; |
54d01ffb DG |
2921 | |
2922 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2923 | ||
3745d315 MD |
2924 | assert(!rcu_read_ongoing()); |
2925 | ||
53a80697 MD |
2926 | *sock_error = 0; |
2927 | ||
2e09ba09 MD |
2928 | switch (cmd_ctx->lsm->cmd_type) { |
2929 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2930 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2931 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2932 | case LTTNG_DESTROY_SESSION: |
2933 | case LTTNG_LIST_SESSIONS: | |
2934 | case LTTNG_LIST_DOMAINS: | |
2935 | case LTTNG_START_TRACE: | |
2936 | case LTTNG_STOP_TRACE: | |
6d805429 | 2937 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2938 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2939 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2940 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2941 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2942 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2943 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 2944 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 2945 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
2946 | case LTTNG_REGISTER_TRIGGER: |
2947 | case LTTNG_UNREGISTER_TRIGGER: | |
2e09ba09 | 2948 | need_domain = 0; |
3aace903 | 2949 | break; |
2e09ba09 MD |
2950 | default: |
2951 | need_domain = 1; | |
2952 | } | |
2953 | ||
e6142f2e | 2954 | if (config.no_kernel && need_domain |
2e09ba09 | 2955 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 2956 | if (!is_root) { |
f73fabfd | 2957 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2958 | } else { |
f73fabfd | 2959 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2960 | } |
4fba7219 DG |
2961 | goto error; |
2962 | } | |
2963 | ||
8d3113b2 DG |
2964 | /* Deny register consumer if we already have a spawned consumer. */ |
2965 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2966 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2967 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2968 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2969 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2970 | goto error; |
2971 | } | |
2972 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2973 | } | |
2974 | ||
54d01ffb DG |
2975 | /* |
2976 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2977 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2978 | * command. |
2979 | */ | |
2980 | switch(cmd_ctx->lsm->cmd_type) { | |
2981 | case LTTNG_LIST_SESSIONS: | |
2982 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2983 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2984 | case LTTNG_LIST_DOMAINS: |
2985 | case LTTNG_LIST_CHANNELS: | |
2986 | case LTTNG_LIST_EVENTS: | |
834978fd | 2987 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 2988 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 2989 | case LTTNG_DATA_PENDING: |
54d01ffb DG |
2990 | break; |
2991 | default: | |
2992 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 2993 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
2994 | if (ret < 0) { |
2995 | /* This label does not try to unlock the session */ | |
2996 | goto init_setup_error; | |
2997 | } | |
2998 | } | |
2999 | ||
3000 | /* Commands that DO NOT need a session. */ | |
3001 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3002 | case LTTNG_CREATE_SESSION: |
27babd3a | 3003 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3004 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3005 | case LTTNG_LIST_SESSIONS: |
3006 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3007 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3008 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3009 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3010 | case LTTNG_REGISTER_TRIGGER: |
3011 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3012 | need_tracing_session = 0; |
54d01ffb DG |
3013 | break; |
3014 | default: | |
3015 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3016 | /* |
3017 | * We keep the session list lock across _all_ commands | |
3018 | * for now, because the per-session lock does not | |
3019 | * handle teardown properly. | |
3020 | */ | |
74babd95 | 3021 | session_lock_list(); |
54d01ffb DG |
3022 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3023 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3024 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3025 | goto error; |
3026 | } else { | |
3027 | /* Acquire lock for the session */ | |
3028 | session_lock(cmd_ctx->session); | |
3029 | } | |
3030 | break; | |
3031 | } | |
b389abbe | 3032 | |
5f3ecf22 DG |
3033 | /* |
3034 | * Commands that need a valid session but should NOT create one if none | |
3035 | * exists. Instead of creating one and destroying it when the command is | |
3036 | * handled, process that right before so we save some round trip in useless | |
3037 | * code path. | |
3038 | */ | |
3039 | switch (cmd_ctx->lsm->cmd_type) { | |
3040 | case LTTNG_DISABLE_CHANNEL: | |
3041 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3042 | switch (cmd_ctx->lsm->domain.type) { |
3043 | case LTTNG_DOMAIN_KERNEL: | |
3044 | if (!cmd_ctx->session->kernel_session) { | |
3045 | ret = LTTNG_ERR_NO_CHANNEL; | |
3046 | goto error; | |
3047 | } | |
3048 | break; | |
3049 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3050 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3051 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3052 | case LTTNG_DOMAIN_UST: |
3053 | if (!cmd_ctx->session->ust_session) { | |
3054 | ret = LTTNG_ERR_NO_CHANNEL; | |
3055 | goto error; | |
3056 | } | |
3057 | break; | |
3058 | default: | |
3059 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3060 | goto error; | |
3061 | } | |
3062 | default: | |
3063 | break; | |
3064 | } | |
3065 | ||
2e09ba09 MD |
3066 | if (!need_domain) { |
3067 | goto skip_domain; | |
3068 | } | |
a4b92340 | 3069 | |
54d01ffb DG |
3070 | /* |
3071 | * Check domain type for specific "pre-action". | |
3072 | */ | |
3073 | switch (cmd_ctx->lsm->domain.type) { | |
3074 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3075 | if (!is_root) { |
f73fabfd | 3076 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3077 | goto error; |
3078 | } | |
3079 | ||
54d01ffb | 3080 | /* Kernel tracer check */ |
a4b35e07 | 3081 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3082 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3083 | ret = init_kernel_tracer(); |
3084 | if (ret != 0) { | |
54d01ffb DG |
3085 | goto error; |
3086 | } | |
3087 | } | |
5eb91c98 | 3088 | |
5c827ce0 DG |
3089 | /* Consumer is in an ERROR state. Report back to client */ |
3090 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3091 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3092 | goto error; |
3093 | } | |
3094 | ||
54d01ffb | 3095 | /* Need a session for kernel command */ |
44d3bd01 | 3096 | if (need_tracing_session) { |
54d01ffb | 3097 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3098 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3099 | if (ret < 0) { |
f73fabfd | 3100 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3101 | goto error; |
3102 | } | |
b389abbe | 3103 | } |
7d29a247 | 3104 | |
54d01ffb | 3105 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3106 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3107 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3108 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3109 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3110 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3111 | if (ret < 0) { |
f73fabfd | 3112 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3113 | goto error; |
950131af | 3114 | } |
5c827ce0 | 3115 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3116 | } else { |
3117 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3118 | } |
173af62f | 3119 | |
a4b92340 DG |
3120 | /* |
3121 | * The consumer was just spawned so we need to add the socket to | |
3122 | * the consumer output of the session if exist. | |
3123 | */ | |
3124 | ret = consumer_create_socket(&kconsumer_data, | |
3125 | cmd_ctx->session->kernel_session->consumer); | |
3126 | if (ret < 0) { | |
3127 | goto error; | |
173af62f | 3128 | } |
0d0c377a | 3129 | } |
5c827ce0 | 3130 | |
54d01ffb | 3131 | break; |
b9dfb167 | 3132 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3133 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3134 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3135 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3136 | { |
b51ec5b4 MD |
3137 | if (!ust_app_supported()) { |
3138 | ret = LTTNG_ERR_NO_UST; | |
3139 | goto error; | |
3140 | } | |
5c827ce0 DG |
3141 | /* Consumer is in an ERROR state. Report back to client */ |
3142 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3143 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3144 | goto error; |
3145 | } | |
3146 | ||
44d3bd01 | 3147 | if (need_tracing_session) { |
a4b92340 | 3148 | /* Create UST session if none exist. */ |
f6a9efaa | 3149 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3150 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3151 | &cmd_ctx->lsm->domain); |
f73fabfd | 3152 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3153 | goto error; |
3154 | } | |
3155 | } | |
00e2e675 | 3156 | |
7753dea8 MD |
3157 | /* Start the UST consumer daemons */ |
3158 | /* 64-bit */ | |
3159 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3160 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3161 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3162 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3163 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3164 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3165 | if (ret < 0) { |
f73fabfd | 3166 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3167 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3168 | goto error; |
3169 | } | |
48842b30 | 3170 | |
173af62f | 3171 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3172 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3173 | } else { |
7753dea8 MD |
3174 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3175 | } | |
173af62f DG |
3176 | |
3177 | /* | |
3178 | * Setup socket for consumer 64 bit. No need for atomic access | |
3179 | * since it was set above and can ONLY be set in this thread. | |
3180 | */ | |
a4b92340 DG |
3181 | ret = consumer_create_socket(&ustconsumer64_data, |
3182 | cmd_ctx->session->ust_session->consumer); | |
3183 | if (ret < 0) { | |
3184 | goto error; | |
173af62f DG |
3185 | } |
3186 | ||
7753dea8 | 3187 | /* 32-bit */ |
385b881b | 3188 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3189 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3190 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3191 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3192 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3193 | ret = start_consumerd(&ustconsumer32_data); | |
3194 | if (ret < 0) { | |
f73fabfd | 3195 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3196 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3197 | goto error; |
3198 | } | |
5c827ce0 | 3199 | |
173af62f | 3200 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3201 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3202 | } else { |
3203 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3204 | } |
173af62f DG |
3205 | |
3206 | /* | |
3207 | * Setup socket for consumer 64 bit. No need for atomic access | |
3208 | * since it was set above and can ONLY be set in this thread. | |
3209 | */ | |
a4b92340 DG |
3210 | ret = consumer_create_socket(&ustconsumer32_data, |
3211 | cmd_ctx->session->ust_session->consumer); | |
3212 | if (ret < 0) { | |
3213 | goto error; | |
173af62f | 3214 | } |
44d3bd01 DG |
3215 | } |
3216 | break; | |
48842b30 | 3217 | } |
54d01ffb | 3218 | default: |
54d01ffb DG |
3219 | break; |
3220 | } | |
2e09ba09 | 3221 | skip_domain: |
33a2b854 | 3222 | |
5c827ce0 DG |
3223 | /* Validate consumer daemon state when start/stop trace command */ |
3224 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3225 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3226 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3227 | case LTTNG_DOMAIN_NONE: |
3228 | break; | |
b9dfb167 | 3229 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3230 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3231 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3232 | case LTTNG_DOMAIN_UST: |
3233 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3234 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3235 | goto error; |
3236 | } | |
3237 | break; | |
3238 | case LTTNG_DOMAIN_KERNEL: | |
3239 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3240 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3241 | goto error; |
3242 | } | |
3243 | break; | |
825535cc JG |
3244 | default: |
3245 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3246 | goto error; | |
5c827ce0 DG |
3247 | } |
3248 | } | |
3249 | ||
8e0af1b4 MD |
3250 | /* |
3251 | * Check that the UID or GID match that of the tracing session. | |
3252 | * The root user can interact with all sessions. | |
3253 | */ | |
3254 | if (need_tracing_session) { | |
3255 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3256 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3257 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3258 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3259 | goto error; |
3260 | } | |
3261 | } | |
3262 | ||
ffe60014 DG |
3263 | /* |
3264 | * Send relayd information to consumer as soon as we have a domain and a | |
3265 | * session defined. | |
3266 | */ | |
3267 | if (cmd_ctx->session && need_domain) { | |
3268 | /* | |
3269 | * Setup relayd if not done yet. If the relayd information was already | |
3270 | * sent to the consumer, this call will gracefully return. | |
3271 | */ | |
3272 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3273 | if (ret != LTTNG_OK) { | |
3274 | goto error; | |
3275 | } | |
3276 | } | |
3277 | ||
54d01ffb DG |
3278 | /* Process by command type */ |
3279 | switch (cmd_ctx->lsm->cmd_type) { | |
3280 | case LTTNG_ADD_CONTEXT: | |
3281 | { | |
2001793c JG |
3282 | /* |
3283 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3284 | * payload if the context being added is an application context. | |
3285 | */ | |
3286 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3287 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3288 | char *provider_name = NULL, *context_name = NULL; | |
3289 | size_t provider_name_len = | |
3290 | cmd_ctx->lsm->u.context.provider_name_len; | |
3291 | size_t context_name_len = | |
3292 | cmd_ctx->lsm->u.context.context_name_len; | |
3293 | ||
3294 | if (provider_name_len == 0 || context_name_len == 0) { | |
3295 | /* | |
3296 | * Application provider and context names MUST | |
3297 | * be provided. | |
3298 | */ | |
3299 | ret = -LTTNG_ERR_INVALID; | |
3300 | goto error; | |
3301 | } | |
3302 | ||
3303 | provider_name = zmalloc(provider_name_len + 1); | |
3304 | if (!provider_name) { | |
3305 | ret = -LTTNG_ERR_NOMEM; | |
3306 | goto error; | |
3307 | } | |
e0f4d107 JG |
3308 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3309 | provider_name; | |
2001793c JG |
3310 | |
3311 | context_name = zmalloc(context_name_len + 1); | |
3312 | if (!context_name) { | |
3313 | ret = -LTTNG_ERR_NOMEM; | |
3314 | goto error_add_context; | |
3315 | } | |
e0f4d107 JG |
3316 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3317 | context_name; | |
2001793c JG |
3318 | |
3319 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3320 | provider_name_len); | |
3321 | if (ret < 0) { | |
3322 | goto error_add_context; | |
3323 | } | |
3324 | ||
3325 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3326 | context_name_len); | |
3327 | if (ret < 0) { | |
3328 | goto error_add_context; | |
3329 | } | |
2001793c JG |
3330 | } |
3331 | ||
3332 | /* | |
3333 | * cmd_add_context assumes ownership of the provider and context | |
3334 | * names. | |
3335 | */ | |
3336 | ret = cmd_add_context(cmd_ctx->session, | |
3337 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3338 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3339 | &cmd_ctx->lsm->u.context.ctx, |
3340 | kernel_poll_pipe[1]); | |
3341 | ||
3342 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3343 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3344 | error_add_context: | |
3345 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3346 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3347 | if (ret < 0) { | |
3348 | goto error; | |
3349 | } | |
54d01ffb DG |
3350 | break; |
3351 | } | |
3352 | case LTTNG_DISABLE_CHANNEL: | |
3353 | { | |
3354 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3355 | cmd_ctx->lsm->u.disable.channel_name); | |
3356 | break; | |
3357 | } | |
3358 | case LTTNG_DISABLE_EVENT: | |
3359 | { | |
47b7e2f9 JG |
3360 | |
3361 | /* | |
3362 | * FIXME: handle filter; for now we just receive the filter's | |
3363 | * bytecode along with the filter expression which are sent by | |
3364 | * liblttng-ctl and discard them. | |
3365 | * | |
3366 | * This fixes an issue where the client may block while sending | |
3367 | * the filter payload and encounter an error because the session | |
3368 | * daemon closes the socket without ever handling this data. | |
3369 | */ | |
3370 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3371 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3372 | ||
3373 | if (count) { | |
3374 | char data[LTTNG_FILTER_MAX_LEN]; | |
3375 | ||
3376 | DBG("Discarding disable event command payload of size %zu", count); | |
3377 | while (count) { | |
3378 | ret = lttcomm_recv_unix_sock(sock, data, | |
3379 | count > sizeof(data) ? sizeof(data) : count); | |
3380 | if (ret < 0) { | |
3381 | goto error; | |
3382 | } | |
3383 | ||
3384 | count -= (size_t) ret; | |
3385 | } | |
3386 | } | |
6e911cad | 3387 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3388 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3389 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3390 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3391 | break; |
3392 | } | |
54d01ffb DG |
3393 | case LTTNG_ENABLE_CHANNEL: |
3394 | { | |
b3530820 JG |
3395 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3396 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3397 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3398 | &cmd_ctx->lsm->u.channel.chan, |
3399 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3400 | break; |
3401 | } | |
ccf10263 MD |
3402 | case LTTNG_TRACK_PID: |
3403 | { | |
3404 | ret = cmd_track_pid(cmd_ctx->session, | |
3405 | cmd_ctx->lsm->domain.type, | |
3406 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3407 | break; | |
3408 | } | |
3409 | case LTTNG_UNTRACK_PID: | |
3410 | { | |
3411 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3412 | cmd_ctx->lsm->domain.type, | |
3413 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3414 | break; | |
3415 | } | |
54d01ffb DG |
3416 | case LTTNG_ENABLE_EVENT: |
3417 | { | |
882ef835 JI |
3418 | struct lttng_event_exclusion *exclusion = NULL; |
3419 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3420 | char *filter_expression = NULL; |
882ef835 | 3421 | |
67676bd8 DG |
3422 | /* Handle exclusion events and receive it from the client. */ |
3423 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3424 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3425 | ||
3426 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3427 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3428 | if (!exclusion) { | |
3429 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3430 | goto error; | |
882ef835 | 3431 | } |
882ef835 | 3432 | |
67676bd8 DG |
3433 | DBG("Receiving var len exclusion event list from client ..."); |
3434 | exclusion->count = count; | |
3435 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3436 | count * LTTNG_SYMBOL_NAME_LEN); | |
3437 | if (ret <= 0) { | |
3438 | DBG("Nothing recv() from client var len data... continuing"); | |
3439 | *sock_error = 1; | |
3440 | free(exclusion); | |
3441 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3442 | goto error; | |
3443 | } | |
3444 | } | |
3445 | ||
6b453b5e JG |
3446 | /* Get filter expression from client. */ |
3447 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3448 | size_t expression_len = | |
3449 | cmd_ctx->lsm->u.enable.expression_len; | |
3450 | ||
3451 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3452 | ret = LTTNG_ERR_FILTER_INVAL; | |
3453 | free(exclusion); | |
3454 | goto error; | |
3455 | } | |
3456 | ||
3457 | filter_expression = zmalloc(expression_len); | |
3458 | if (!filter_expression) { | |
3459 | free(exclusion); | |
3460 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3461 | goto error; | |
3462 | } | |
3463 | ||
3464 | /* Receive var. len. data */ | |
3465 | DBG("Receiving var len filter's expression from client ..."); | |
3466 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3467 | expression_len); | |
3468 | if (ret <= 0) { | |
3469 | DBG("Nothing recv() from client car len data... continuing"); | |
3470 | *sock_error = 1; | |
3471 | free(filter_expression); | |
3472 | free(exclusion); | |
3473 | ret = LTTNG_ERR_FILTER_INVAL; | |
3474 | goto error; | |
3475 | } | |
3476 | } | |
3477 | ||
67676bd8 DG |
3478 | /* Handle filter and get bytecode from client. */ |
3479 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3480 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3481 | ||
3482 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3483 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3484 | free(filter_expression); |
67676bd8 DG |
3485 | free(exclusion); |
3486 | goto error; | |
3487 | } | |
3488 | ||
3489 | bytecode = zmalloc(bytecode_len); | |
3490 | if (!bytecode) { | |
49d21f93 | 3491 | free(filter_expression); |
67676bd8 DG |
3492 | free(exclusion); |
3493 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3494 | goto error; | |
882ef835 JI |
3495 | } |
3496 | ||
67676bd8 DG |
3497 | /* Receive var. len. data */ |
3498 | DBG("Receiving var len filter's bytecode from client ..."); | |
3499 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3500 | if (ret <= 0) { | |
3501 | DBG("Nothing recv() from client car len data... continuing"); | |
3502 | *sock_error = 1; | |
49d21f93 | 3503 | free(filter_expression); |
67676bd8 DG |
3504 | free(bytecode); |
3505 | free(exclusion); | |
3506 | ret = LTTNG_ERR_FILTER_INVAL; | |
3507 | goto error; | |
3508 | } | |
3509 | ||
3510 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3511 | free(filter_expression); |
67676bd8 DG |
3512 | free(bytecode); |
3513 | free(exclusion); | |
3514 | ret = LTTNG_ERR_FILTER_INVAL; | |
3515 | goto error; | |
3516 | } | |
882ef835 | 3517 | } |
67676bd8 DG |
3518 | |
3519 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3520 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3521 | &cmd_ctx->lsm->u.enable.event, |
3522 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3523 | kernel_poll_pipe[1]); |
54d01ffb DG |
3524 | break; |
3525 | } | |
052da939 | 3526 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3527 | { |
9f19cc17 | 3528 | struct lttng_event *events; |
54d01ffb | 3529 | ssize_t nb_events; |
052da939 | 3530 | |
0845bbfa | 3531 | session_lock_list(); |
54d01ffb | 3532 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3533 | session_unlock_list(); |
54d01ffb | 3534 | if (nb_events < 0) { |
f73fabfd | 3535 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3536 | ret = -nb_events; |
3537 | goto error; | |
2ef84c95 DG |
3538 | } |
3539 | ||
3540 | /* | |
3541 | * Setup lttng message with payload size set to the event list size in | |
3542 | * bytes and then copy list into the llm payload. | |
3543 | */ | |
6e10c9b9 PP |
3544 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3545 | sizeof(struct lttng_event) * nb_events); | |
3546 | free(events); | |
3547 | ||
2ef84c95 DG |
3548 | if (ret < 0) { |
3549 | goto setup_error; | |
3550 | } | |
3551 | ||
f73fabfd | 3552 | ret = LTTNG_OK; |
2ef84c95 DG |
3553 | break; |
3554 | } | |
f37d259d MD |
3555 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3556 | { | |
3557 | struct lttng_event_field *fields; | |
3558 | ssize_t nb_fields; | |
3559 | ||
0845bbfa | 3560 | session_lock_list(); |
a4b92340 DG |
3561 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3562 | &fields); | |
0845bbfa | 3563 | session_unlock_list(); |
f37d259d | 3564 | if (nb_fields < 0) { |
f73fabfd | 3565 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3566 | ret = -nb_fields; |
3567 | goto error; | |
3568 | } | |
3569 | ||
3570 | /* | |
3571 | * Setup lttng message with payload size set to the event list size in | |
3572 | * bytes and then copy list into the llm payload. | |
3573 | */ | |
6e10c9b9 | 3574 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3575 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3576 | free(fields); |
3577 | ||
f37d259d | 3578 | if (ret < 0) { |
f37d259d MD |
3579 | goto setup_error; |
3580 | } | |
3581 | ||
f73fabfd | 3582 | ret = LTTNG_OK; |
f37d259d MD |
3583 | break; |
3584 | } | |
834978fd DG |
3585 | case LTTNG_LIST_SYSCALLS: |
3586 | { | |
3587 | struct lttng_event *events; | |
3588 | ssize_t nb_events; | |
3589 | ||
3590 | nb_events = cmd_list_syscalls(&events); | |
3591 | if (nb_events < 0) { | |
3592 | /* Return value is a negative lttng_error_code. */ | |
3593 | ret = -nb_events; | |
3594 | goto error; | |
3595 | } | |
3596 | ||
3597 | /* | |
3598 | * Setup lttng message with payload size set to the event list size in | |
3599 | * bytes and then copy list into the llm payload. | |
3600 | */ | |
6e10c9b9 PP |
3601 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3602 | sizeof(struct lttng_event) * nb_events); | |
3603 | free(events); | |
3604 | ||
834978fd | 3605 | if (ret < 0) { |
834978fd DG |
3606 | goto setup_error; |
3607 | } | |
3608 | ||
834978fd DG |
3609 | ret = LTTNG_OK; |
3610 | break; | |
3611 | } | |
a5dfbb9d MD |
3612 | case LTTNG_LIST_TRACKER_PIDS: |
3613 | { | |
3614 | int32_t *pids = NULL; | |
3615 | ssize_t nr_pids; | |
3616 | ||
3617 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3618 | cmd_ctx->lsm->domain.type, &pids); | |
3619 | if (nr_pids < 0) { | |
3620 | /* Return value is a negative lttng_error_code. */ | |
3621 | ret = -nr_pids; | |
3622 | goto error; | |
3623 | } | |
3624 | ||
3625 | /* | |
3626 | * Setup lttng message with payload size set to the event list size in | |
3627 | * bytes and then copy list into the llm payload. | |
3628 | */ | |
6e10c9b9 PP |
3629 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3630 | sizeof(int32_t) * nr_pids); | |
3631 | free(pids); | |
3632 | ||
a5dfbb9d | 3633 | if (ret < 0) { |
a5dfbb9d MD |
3634 | goto setup_error; |
3635 | } | |
3636 | ||
a5dfbb9d MD |
3637 | ret = LTTNG_OK; |
3638 | break; | |
3639 | } | |
00e2e675 DG |
3640 | case LTTNG_SET_CONSUMER_URI: |
3641 | { | |
a4b92340 DG |
3642 | size_t nb_uri, len; |
3643 | struct lttng_uri *uris; | |
3644 | ||
3645 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3646 | len = nb_uri * sizeof(struct lttng_uri); | |
3647 | ||
3648 | if (nb_uri == 0) { | |
f73fabfd | 3649 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3650 | goto error; |
3651 | } | |
3652 | ||
3653 | uris = zmalloc(len); | |
3654 | if (uris == NULL) { | |
f73fabfd | 3655 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3656 | goto error; |
3657 | } | |
3658 | ||
3659 | /* Receive variable len data */ | |
77c7c900 | 3660 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3661 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3662 | if (ret <= 0) { | |
3663 | DBG("No URIs received from client... continuing"); | |
3664 | *sock_error = 1; | |
f73fabfd | 3665 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3666 | free(uris); |
a4b92340 DG |
3667 | goto error; |
3668 | } | |
3669 | ||
bda32d56 JG |
3670 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3671 | free(uris); | |
f73fabfd | 3672 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3673 | goto error; |
3674 | } | |
3675 | ||
b1d41407 | 3676 | |
00e2e675 DG |
3677 | break; |
3678 | } | |
f3ed775e | 3679 | case LTTNG_START_TRACE: |
8c0faa1d | 3680 | { |
54d01ffb | 3681 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3682 | break; |
3683 | } | |
f3ed775e | 3684 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3685 | { |
54d01ffb | 3686 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3687 | break; |
3688 | } | |
5e16da05 MD |
3689 | case LTTNG_CREATE_SESSION: |
3690 | { | |
a4b92340 DG |
3691 | size_t nb_uri, len; |
3692 | struct lttng_uri *uris = NULL; | |
3693 | ||
3694 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3695 | len = nb_uri * sizeof(struct lttng_uri); | |
3696 | ||
3697 | if (nb_uri > 0) { | |
3698 | uris = zmalloc(len); | |
3699 | if (uris == NULL) { | |
f73fabfd | 3700 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3701 | goto error; |
3702 | } | |
3703 | ||
3704 | /* Receive variable len data */ | |
77c7c900 | 3705 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3706 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3707 | if (ret <= 0) { | |
3708 | DBG("No URIs received from client... continuing"); | |
3709 | *sock_error = 1; | |
f73fabfd | 3710 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3711 | free(uris); |
a4b92340 DG |
3712 | goto error; |
3713 | } | |
3714 | ||
3715 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3716 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3717 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3718 | free(uris); |
a4b92340 DG |
3719 | goto error; |
3720 | } | |
3721 | } | |
3722 | ||
3723 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3724 | &cmd_ctx->creds, 0); |
a4b92340 | 3725 | |
b1d41407 DG |
3726 | free(uris); |
3727 | ||
00e2e675 DG |
3728 | break; |
3729 | } | |
5e16da05 MD |
3730 | case LTTNG_DESTROY_SESSION: |
3731 | { | |
2f77fc4b | 3732 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3733 | |
3734 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3735 | cmd_ctx->session = NULL; |
5461b305 | 3736 | break; |
5e16da05 | 3737 | } |
9f19cc17 | 3738 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3739 | { |
54d01ffb | 3740 | ssize_t nb_dom; |
fa64dfb4 | 3741 | struct lttng_domain *domains = NULL; |
5461b305 | 3742 | |
54d01ffb DG |
3743 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3744 | if (nb_dom < 0) { | |
f73fabfd | 3745 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3746 | ret = -nb_dom; |
3747 | goto error; | |
ce3d728c | 3748 | } |
520ff687 | 3749 | |
6e10c9b9 PP |
3750 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3751 | nb_dom * sizeof(struct lttng_domain)); | |
3752 | free(domains); | |
3753 | ||
5461b305 DG |
3754 | if (ret < 0) { |
3755 | goto setup_error; | |
520ff687 | 3756 | } |
57167058 | 3757 | |
f73fabfd | 3758 | ret = LTTNG_OK; |
5e16da05 MD |
3759 | break; |
3760 | } | |
9f19cc17 | 3761 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3762 | { |
53e367f9 | 3763 | ssize_t payload_size; |
ade7ce52 | 3764 | struct lttng_channel *channels = NULL; |
54d01ffb | 3765 | |
53e367f9 | 3766 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3767 | cmd_ctx->session, &channels); |
53e367f9 | 3768 | if (payload_size < 0) { |
f73fabfd | 3769 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3770 | ret = -payload_size; |
54d01ffb | 3771 | goto error; |
5461b305 | 3772 | } |
ca95a216 | 3773 | |
6e10c9b9 | 3774 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3775 | payload_size); |
6e10c9b9 PP |
3776 | free(channels); |
3777 | ||
5461b305 DG |
3778 | if (ret < 0) { |
3779 | goto setup_error; | |
3780 | } | |
9f19cc17 | 3781 | |
f73fabfd | 3782 | ret = LTTNG_OK; |
5461b305 | 3783 | break; |
5e16da05 | 3784 | } |
9f19cc17 | 3785 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3786 | { |
b551a063 | 3787 | ssize_t nb_event; |
684d34d2 | 3788 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3789 | struct lttcomm_event_command_header cmd_header; |
3790 | size_t total_size; | |
3791 | ||
b2d66287 | 3792 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3793 | /* Extended infos are included at the end of events */ |
3794 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3795 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3796 | &events, &total_size); | |
9f19cc17 | 3797 | |
54d01ffb | 3798 | if (nb_event < 0) { |
f73fabfd | 3799 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3800 | ret = -nb_event; |
3801 | goto error; | |
5461b305 | 3802 | } |
ca95a216 | 3803 | |
b4e3ceb9 PP |
3804 | cmd_header.nb_events = nb_event; |
3805 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3806 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3807 | free(events); |
3808 | ||
5461b305 DG |
3809 | if (ret < 0) { |
3810 | goto setup_error; | |
3811 | } | |
9f19cc17 | 3812 | |
f73fabfd | 3813 | ret = LTTNG_OK; |
5461b305 | 3814 | break; |
5e16da05 MD |
3815 | } |
3816 | case LTTNG_LIST_SESSIONS: | |
3817 | { | |
8e0af1b4 | 3818 | unsigned int nr_sessions; |
6e10c9b9 PP |
3819 | void *sessions_payload; |
3820 | size_t payload_len; | |
5461b305 | 3821 | |
8e0af1b4 | 3822 | session_lock_list(); |
730389d9 DG |
3823 | nr_sessions = lttng_sessions_count( |
3824 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3825 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3826 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3827 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3828 | |
6e10c9b9 | 3829 | if (!sessions_payload) { |
54d01ffb | 3830 | session_unlock_list(); |
6e10c9b9 | 3831 | ret = -ENOMEM; |
5461b305 | 3832 | goto setup_error; |
e065084a | 3833 | } |
5e16da05 | 3834 | |
6e10c9b9 | 3835 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3836 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3837 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3838 | session_unlock_list(); |
5e16da05 | 3839 | |
6e10c9b9 PP |
3840 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3841 | payload_len); | |
3842 | free(sessions_payload); | |
3843 | ||
3844 | if (ret < 0) { | |
3845 | goto setup_error; | |
3846 | } | |
3847 | ||
f73fabfd | 3848 | ret = LTTNG_OK; |
5e16da05 MD |
3849 | break; |
3850 | } | |
d9800920 DG |
3851 | case LTTNG_REGISTER_CONSUMER: |
3852 | { | |
2f77fc4b DG |
3853 | struct consumer_data *cdata; |
3854 | ||
3855 | switch (cmd_ctx->lsm->domain.type) { | |
3856 | case LTTNG_DOMAIN_KERNEL: | |
3857 | cdata = &kconsumer_data; | |
3858 | break; | |
3859 | default: | |
f73fabfd | 3860 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3861 | goto error; |
3862 | } | |
3863 | ||
54d01ffb | 3864 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3865 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3866 | break; |
3867 | } | |
6d805429 | 3868 | case LTTNG_DATA_PENDING: |
806e2684 | 3869 | { |
f6151c55 | 3870 | int pending_ret; |
6e10c9b9 | 3871 | uint8_t pending_ret_byte; |
f6151c55 JG |
3872 | |
3873 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3874 | |
f6151c55 JG |
3875 | /* |
3876 | * FIXME | |
3877 | * | |
3878 | * This function may returns 0 or 1 to indicate whether or not | |
3879 | * there is data pending. In case of error, it should return an | |
3880 | * LTTNG_ERR code. However, some code paths may still return | |
3881 | * a nondescript error code, which we handle by returning an | |
3882 | * "unknown" error. | |
3883 | */ | |
3884 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3885 | /* |
3886 | * ret will be set to LTTNG_OK at the end of | |
3887 | * this function. | |
3888 | */ | |
f6151c55 JG |
3889 | } else if (pending_ret < 0) { |
3890 | ret = LTTNG_ERR_UNK; | |
3891 | goto setup_error; | |
3892 | } else { | |
3893 | ret = pending_ret; | |
3894 | goto setup_error; | |
3895 | } | |
3896 | ||
6e10c9b9 PP |
3897 | pending_ret_byte = (uint8_t) pending_ret; |
3898 | ||
3899 | /* 1 byte to return whether or not data is pending */ | |
3900 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
3901 | &pending_ret_byte, 1); | |
3902 | ||
3903 | if (ret < 0) { | |
3904 | goto setup_error; | |
3905 | } | |
3906 | ||
3907 | ret = LTTNG_OK; | |
806e2684 DG |
3908 | break; |
3909 | } | |
da3c9ec1 DG |
3910 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3911 | { | |
6dc3064a DG |
3912 | struct lttcomm_lttng_output_id reply; |
3913 | ||
3914 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3915 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3916 | if (ret != LTTNG_OK) { | |
3917 | goto error; | |
3918 | } | |
3919 | ||
6e10c9b9 PP |
3920 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
3921 | sizeof(reply)); | |
6dc3064a DG |
3922 | if (ret < 0) { |
3923 | goto setup_error; | |
3924 | } | |
3925 | ||
3926 | /* Copy output list into message payload */ | |
6dc3064a | 3927 | ret = LTTNG_OK; |
da3c9ec1 DG |
3928 | break; |
3929 | } | |
3930 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3931 | { | |
6dc3064a DG |
3932 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3933 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3934 | break; |
3935 | } | |
3936 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3937 | { | |
6dc3064a DG |
3938 | ssize_t nb_output; |
3939 | struct lttng_snapshot_output *outputs = NULL; | |
3940 | ||
3941 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3942 | if (nb_output < 0) { | |
3943 | ret = -nb_output; | |
3944 | goto error; | |
3945 | } | |
3946 | ||
6e10c9b9 PP |
3947 | assert((nb_output > 0 && outputs) || nb_output == 0); |
3948 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 3949 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
3950 | free(outputs); |
3951 | ||
6dc3064a | 3952 | if (ret < 0) { |
6dc3064a DG |
3953 | goto setup_error; |
3954 | } | |
3955 | ||
6dc3064a | 3956 | ret = LTTNG_OK; |
da3c9ec1 DG |
3957 | break; |
3958 | } | |
3959 | case LTTNG_SNAPSHOT_RECORD: | |
3960 | { | |
6dc3064a DG |
3961 | ret = cmd_snapshot_record(cmd_ctx->session, |
3962 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3963 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3964 | break; |
3965 | } | |
27babd3a DG |
3966 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3967 | { | |
3968 | size_t nb_uri, len; | |
3969 | struct lttng_uri *uris = NULL; | |
3970 | ||
3971 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3972 | len = nb_uri * sizeof(struct lttng_uri); | |
3973 | ||
3974 | if (nb_uri > 0) { | |
3975 | uris = zmalloc(len); | |
3976 | if (uris == NULL) { | |
3977 | ret = LTTNG_ERR_FATAL; | |
3978 | goto error; | |
3979 | } | |
3980 | ||
3981 | /* Receive variable len data */ | |
3982 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3983 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3984 | if (ret <= 0) { | |
3985 | DBG("No URIs received from client... continuing"); | |
3986 | *sock_error = 1; | |
3987 | ret = LTTNG_ERR_SESSION_FAIL; | |
3988 | free(uris); | |
3989 | goto error; | |
3990 | } | |
3991 | ||
3992 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3993 | DBG("Creating session with ONE network URI is a bad call"); | |
3994 | ret = LTTNG_ERR_SESSION_FAIL; | |
3995 | free(uris); | |
3996 | goto error; | |
3997 | } | |
3998 | } | |
3999 | ||
4000 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4001 | nb_uri, &cmd_ctx->creds); | |
4002 | free(uris); | |
4003 | break; | |
4004 | } | |
ecc48a90 JD |
4005 | case LTTNG_CREATE_SESSION_LIVE: |
4006 | { | |
4007 | size_t nb_uri, len; | |
4008 | struct lttng_uri *uris = NULL; | |
4009 | ||
4010 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4011 | len = nb_uri * sizeof(struct lttng_uri); | |
4012 | ||
4013 | if (nb_uri > 0) { | |
4014 | uris = zmalloc(len); | |
4015 | if (uris == NULL) { | |
4016 | ret = LTTNG_ERR_FATAL; | |
4017 | goto error; | |
4018 | } | |
4019 | ||
4020 | /* Receive variable len data */ | |
4021 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4022 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4023 | if (ret <= 0) { | |
4024 | DBG("No URIs received from client... continuing"); | |
4025 | *sock_error = 1; | |
4026 | ret = LTTNG_ERR_SESSION_FAIL; | |
4027 | free(uris); | |
4028 | goto error; | |
4029 | } | |
4030 | ||
4031 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4032 | DBG("Creating session with ONE network URI is a bad call"); | |
4033 | ret = LTTNG_ERR_SESSION_FAIL; | |
4034 | free(uris); | |
4035 | goto error; | |
4036 | } | |
4037 | } | |
4038 | ||
4039 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4040 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4041 | free(uris); | |
4042 | break; | |
4043 | } | |
fb198a11 JG |
4044 | case LTTNG_SAVE_SESSION: |
4045 | { | |
4046 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4047 | &cmd_ctx->creds); | |
4048 | break; | |
4049 | } | |
d7ba1388 MD |
4050 | case LTTNG_SET_SESSION_SHM_PATH: |
4051 | { | |
4052 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4053 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4054 | break; | |
4055 | } | |
eded6438 | 4056 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4057 | { |
eded6438 | 4058 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4059 | break; |
4060 | } | |
c2561365 JD |
4061 | case LTTNG_REGENERATE_STATEDUMP: |
4062 | { | |
4063 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4064 | break; | |
4065 | } | |
b3530820 JG |
4066 | case LTTNG_REGISTER_TRIGGER: |
4067 | { | |
4068 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4069 | notification_thread_handle); | |
4070 | break; | |
4071 | } | |
4072 | case LTTNG_UNREGISTER_TRIGGER: | |
4073 | { | |
4074 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4075 | notification_thread_handle); | |
4076 | break; | |
4077 | } | |
5e16da05 | 4078 | default: |
f73fabfd | 4079 | ret = LTTNG_ERR_UND; |
5461b305 | 4080 | break; |
fac6795d DG |
4081 | } |
4082 | ||
5461b305 | 4083 | error: |
5461b305 DG |
4084 | if (cmd_ctx->llm == NULL) { |
4085 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4086 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4087 | goto setup_error; |
4088 | } | |
4089 | } | |
54d01ffb | 4090 | /* Set return code */ |
5461b305 | 4091 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4092 | setup_error: |
b5541356 | 4093 | if (cmd_ctx->session) { |
54d01ffb | 4094 | session_unlock(cmd_ctx->session); |
b5541356 | 4095 | } |
256a5576 MD |
4096 | if (need_tracing_session) { |
4097 | session_unlock_list(); | |
4098 | } | |
54d01ffb | 4099 | init_setup_error: |
3745d315 | 4100 | assert(!rcu_read_ongoing()); |
8028d920 | 4101 | return ret; |
fac6795d DG |
4102 | } |
4103 | ||
44a5e5eb DG |
4104 | /* |
4105 | * Thread managing health check socket. | |
4106 | */ | |
4107 | static void *thread_manage_health(void *data) | |
4108 | { | |
eb4a2943 | 4109 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4110 | uint32_t revents, nb_fd; |
4111 | struct lttng_poll_event events; | |
0c89d795 MD |
4112 | struct health_comm_msg msg; |
4113 | struct health_comm_reply reply; | |
44a5e5eb DG |
4114 | |
4115 | DBG("[thread] Manage health check started"); | |
4116 | ||
4117 | rcu_register_thread(); | |
4118 | ||
6d737ce4 DG |
4119 | /* We might hit an error path before this is created. */ |
4120 | lttng_poll_init(&events); | |
3cc04881 | 4121 | |
44a5e5eb | 4122 | /* Create unix socket */ |
e6142f2e | 4123 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4124 | if (sock < 0) { |
4125 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4126 | goto error; |
4127 | } | |
4128 | ||
6c71277b MD |
4129 | if (is_root) { |
4130 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4131 | ret = chown(config.health_unix_sock_path.value, 0, |
4132 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4133 | if (ret < 0) { |
e6142f2e | 4134 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4135 | PERROR("chown"); |
6c71277b MD |
4136 | goto error; |
4137 | } | |
4138 | ||
e6142f2e | 4139 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4140 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4141 | if (ret < 0) { | |
e6142f2e | 4142 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4143 | PERROR("chmod"); |
6c71277b MD |
4144 | goto error; |
4145 | } | |
4146 | } | |
4147 | ||
b662582b DG |
4148 | /* |
4149 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4150 | * show must go on. | |
4151 | */ | |
4152 | (void) utils_set_fd_cloexec(sock); | |
4153 | ||
44a5e5eb DG |
4154 | ret = lttcomm_listen_unix_sock(sock); |
4155 | if (ret < 0) { | |
4156 | goto error; | |
4157 | } | |
4158 | ||
4159 | /* | |
4160 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4161 | * more will be added to this poll set. | |
4162 | */ | |
d0b96690 | 4163 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4164 | if (ret < 0) { |
4165 | goto error; | |
4166 | } | |
4167 | ||
4168 | /* Add the application registration socket */ | |
4169 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4170 | if (ret < 0) { | |
4171 | goto error; | |
4172 | } | |
4173 | ||
ef367a93 | 4174 | sessiond_notify_ready(); |
97bc1426 | 4175 | |
44a5e5eb DG |
4176 | while (1) { |
4177 | DBG("Health check ready"); | |
4178 | ||
44a5e5eb DG |
4179 | /* Inifinite blocking call, waiting for transmission */ |
4180 | restart: | |
4181 | ret = lttng_poll_wait(&events, -1); | |
4182 | if (ret < 0) { | |
4183 | /* | |
4184 | * Restart interrupted system call. | |
4185 | */ | |
4186 | if (errno == EINTR) { | |
4187 | goto restart; | |
4188 | } | |
4189 | goto error; | |
4190 | } | |
4191 | ||
0d9c5d77 DG |
4192 | nb_fd = ret; |
4193 | ||
44a5e5eb DG |
4194 | for (i = 0; i < nb_fd; i++) { |
4195 | /* Fetch once the poll data */ | |
4196 | revents = LTTNG_POLL_GETEV(&events, i); | |
4197 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4198 | ||
fd20dac9 MD |
4199 | if (!revents) { |
4200 | /* No activity for this FD (poll implementation). */ | |
4201 | continue; | |
4202 | } | |
4203 | ||
44a5e5eb | 4204 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4205 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4206 | if (ret) { |
139ac872 MD |
4207 | err = 0; |
4208 | goto exit; | |
44a5e5eb DG |
4209 | } |
4210 | ||
4211 | /* Event on the registration socket */ | |
4212 | if (pollfd == sock) { | |
03e43155 MD |
4213 | if (revents & LPOLLIN) { |
4214 | continue; | |
4215 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4216 | ERR("Health socket poll error"); |
4217 | goto error; | |
03e43155 MD |
4218 | } else { |
4219 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4220 | goto error; | |
44a5e5eb DG |
4221 | } |
4222 | } | |
4223 | } | |
4224 | ||
4225 | new_sock = lttcomm_accept_unix_sock(sock); | |
4226 | if (new_sock < 0) { | |
4227 | goto error; | |
4228 | } | |
4229 | ||
b662582b DG |
4230 | /* |
4231 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4232 | * show must go on. | |
4233 | */ | |
4234 | (void) utils_set_fd_cloexec(new_sock); | |
4235 | ||
44a5e5eb DG |
4236 | DBG("Receiving data from client for health..."); |
4237 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4238 | if (ret <= 0) { | |
4239 | DBG("Nothing recv() from client... continuing"); | |
4240 | ret = close(new_sock); | |
4241 | if (ret) { | |
4242 | PERROR("close"); | |
4243 | } | |
44a5e5eb DG |
4244 | continue; |
4245 | } | |
4246 | ||
4247 | rcu_thread_online(); | |
4248 | ||
53efb85a | 4249 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4250 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4251 | /* | |
4252 | * health_check_state returns 0 if health is | |
4253 | * bad. | |
4254 | */ | |
4255 | if (!health_check_state(health_sessiond, i)) { | |
4256 | reply.ret_code |= 1ULL << i; | |
4257 | } | |
44a5e5eb DG |
4258 | } |
4259 | ||
6c71277b | 4260 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4261 | |
4262 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4263 | if (ret < 0) { | |
4264 | ERR("Failed to send health data back to client"); | |
4265 | } | |
4266 | ||
4267 | /* End of transmission */ | |
4268 | ret = close(new_sock); | |
4269 | if (ret) { | |
4270 | PERROR("close"); | |
4271 | } | |
44a5e5eb DG |
4272 | } |
4273 | ||
139ac872 | 4274 | exit: |
44a5e5eb | 4275 | error: |
139ac872 MD |
4276 | if (err) { |
4277 | ERR("Health error occurred in %s", __func__); | |
4278 | } | |
44a5e5eb | 4279 | DBG("Health check thread dying"); |
e6142f2e | 4280 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4281 | if (sock >= 0) { |
4282 | ret = close(sock); | |
4283 | if (ret) { | |
4284 | PERROR("close"); | |
4285 | } | |
4286 | } | |
44a5e5eb DG |
4287 | |
4288 | lttng_poll_clean(&events); | |
b11d6a7f | 4289 | stop_threads(); |
44a5e5eb DG |
4290 | rcu_unregister_thread(); |
4291 | return NULL; | |
4292 | } | |
4293 | ||
1d4b027a | 4294 | /* |
d063d709 DG |
4295 | * This thread manage all clients request using the unix client socket for |
4296 | * communication. | |
1d4b027a DG |
4297 | */ |
4298 | static void *thread_manage_clients(void *data) | |
4299 | { | |
139ac872 | 4300 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4301 | int sock_error; |
5eb91c98 | 4302 | uint32_t revents, nb_fd; |
273ea72c | 4303 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4304 | struct lttng_poll_event events; |
1d4b027a DG |
4305 | |
4306 | DBG("[thread] Manage client started"); | |
4307 | ||
f6a9efaa DG |
4308 | rcu_register_thread(); |
4309 | ||
6c71277b | 4310 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4311 | |
840cb59c | 4312 | health_code_update(); |
44a5e5eb | 4313 | |
1d4b027a DG |
4314 | ret = lttcomm_listen_unix_sock(client_sock); |
4315 | if (ret < 0) { | |
35df2755 | 4316 | goto error_listen; |
1d4b027a DG |
4317 | } |
4318 | ||
5eb91c98 DG |
4319 | /* |
4320 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4321 | * more will be added to this poll set. | |
4322 | */ | |
d0b96690 | 4323 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4324 | if (ret < 0) { |
35df2755 | 4325 | goto error_create_poll; |
5eb91c98 | 4326 | } |
273ea72c | 4327 | |
5eb91c98 DG |
4328 | /* Add the application registration socket */ |
4329 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4330 | if (ret < 0) { | |
4331 | goto error; | |
4332 | } | |
273ea72c | 4333 | |
ef367a93 JG |
4334 | sessiond_notify_ready(); |
4335 | ret = sem_post(&load_info->message_thread_ready); | |
4336 | if (ret) { | |
4337 | PERROR("sem_post message_thread_ready"); | |
4338 | goto error; | |
4339 | } | |
0bb7724a | 4340 | |
72453c8c MD |
4341 | /* This testpoint is after we signal readiness to the parent. */ |
4342 | if (testpoint(sessiond_thread_manage_clients)) { | |
4343 | goto error; | |
4344 | } | |
4345 | ||
e547b070 | 4346 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4347 | goto error; |
4348 | } | |
8ac94142 | 4349 | |
840cb59c | 4350 | health_code_update(); |
44a5e5eb | 4351 | |
1d4b027a | 4352 | while (1) { |
1d4b027a | 4353 | DBG("Accepting client command ..."); |
273ea72c DG |
4354 | |
4355 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4356 | restart: |
a78af745 | 4357 | health_poll_entry(); |
5eb91c98 | 4358 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4359 | health_poll_exit(); |
273ea72c | 4360 | if (ret < 0) { |
88f2b785 MD |
4361 | /* |
4362 | * Restart interrupted system call. | |
4363 | */ | |
4364 | if (errno == EINTR) { | |
4365 | goto restart; | |
4366 | } | |
273ea72c DG |
4367 | goto error; |
4368 | } | |
4369 | ||
0d9c5d77 DG |
4370 | nb_fd = ret; |
4371 | ||
5eb91c98 DG |
4372 | for (i = 0; i < nb_fd; i++) { |
4373 | /* Fetch once the poll data */ | |
4374 | revents = LTTNG_POLL_GETEV(&events, i); | |
4375 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4376 | ||
840cb59c | 4377 | health_code_update(); |
44a5e5eb | 4378 | |
fd20dac9 MD |
4379 | if (!revents) { |
4380 | /* No activity for this FD (poll implementation). */ | |
4381 | continue; | |
4382 | } | |
4383 | ||
5eb91c98 | 4384 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4385 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4386 | if (ret) { |
139ac872 MD |
4387 | err = 0; |
4388 | goto exit; | |
5eb91c98 DG |
4389 | } |
4390 | ||
4391 | /* Event on the registration socket */ | |
4392 | if (pollfd == client_sock) { | |
03e43155 MD |
4393 | if (revents & LPOLLIN) { |
4394 | continue; | |
4395 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4396 | ERR("Client socket poll error"); |
4397 | goto error; | |
03e43155 MD |
4398 | } else { |
4399 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4400 | goto error; | |
5eb91c98 DG |
4401 | } |
4402 | } | |
4403 | } | |
4404 | ||
4405 | DBG("Wait for client response"); | |
4406 | ||
840cb59c | 4407 | health_code_update(); |
44a5e5eb | 4408 | |
5eb91c98 DG |
4409 | sock = lttcomm_accept_unix_sock(client_sock); |
4410 | if (sock < 0) { | |
273ea72c | 4411 | goto error; |
273ea72c DG |
4412 | } |
4413 | ||
b662582b DG |
4414 | /* |
4415 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4416 | * show must go on. | |
4417 | */ | |
4418 | (void) utils_set_fd_cloexec(sock); | |
4419 | ||
be040666 DG |
4420 | /* Set socket option for credentials retrieval */ |
4421 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4422 | if (ret < 0) { | |
4423 | goto error; | |
4424 | } | |
4425 | ||
5eb91c98 | 4426 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4427 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4428 | if (cmd_ctx == NULL) { |
76d7553f | 4429 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4430 | goto error; |
5eb91c98 | 4431 | } |
1d4b027a | 4432 | |
5eb91c98 | 4433 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4434 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4435 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4436 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4437 | goto error; |
4438 | } | |
1d4b027a | 4439 | |
5eb91c98 DG |
4440 | cmd_ctx->llm = NULL; |
4441 | cmd_ctx->session = NULL; | |
1d4b027a | 4442 | |
840cb59c | 4443 | health_code_update(); |
44a5e5eb | 4444 | |
5eb91c98 DG |
4445 | /* |
4446 | * Data is received from the lttng client. The struct | |
4447 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4448 | * the client. | |
4449 | */ | |
4450 | DBG("Receiving data from client ..."); | |
be040666 DG |
4451 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4452 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4453 | if (ret <= 0) { |
4454 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4455 | ret = close(sock); |
4456 | if (ret) { | |
4457 | PERROR("close"); | |
4458 | } | |
4459 | sock = -1; | |
a2c0da86 | 4460 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4461 | continue; |
4462 | } | |
1d4b027a | 4463 | |
840cb59c | 4464 | health_code_update(); |
44a5e5eb | 4465 | |
5eb91c98 DG |
4466 | // TODO: Validate cmd_ctx including sanity check for |
4467 | // security purpose. | |
f7776ea7 | 4468 | |
f6a9efaa | 4469 | rcu_thread_online(); |
5eb91c98 DG |
4470 | /* |
4471 | * This function dispatch the work to the kernel or userspace tracer | |
4472 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4473 | * informations for the client. The command context struct contains | |
4474 | * everything this function may needs. | |
4475 | */ | |
53a80697 | 4476 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4477 | rcu_thread_offline(); |
5eb91c98 | 4478 | if (ret < 0) { |
36134aa1 DG |
4479 | ret = close(sock); |
4480 | if (ret) { | |
4481 | PERROR("close"); | |
53a80697 | 4482 | } |
36134aa1 | 4483 | sock = -1; |
bbd973c2 | 4484 | /* |
5eb91c98 | 4485 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4486 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4487 | * (ENOMEM). Error detected but still accept |
4488 | * command, unless a socket error has been | |
4489 | * detected. | |
bbd973c2 | 4490 | */ |
bbd973c2 | 4491 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4492 | continue; |
4493 | } | |
d6e4fca4 | 4494 | |
840cb59c | 4495 | health_code_update(); |
44a5e5eb | 4496 | |
a1ac8b97 | 4497 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4498 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4499 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4500 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4501 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4502 | if (ret < 0) { |
4503 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4504 | } |
1d4b027a | 4505 | |
5eb91c98 | 4506 | /* End of transmission */ |
76d7553f MD |
4507 | ret = close(sock); |
4508 | if (ret) { | |
4509 | PERROR("close"); | |
4510 | } | |
4511 | sock = -1; | |
be040666 DG |
4512 | |
4513 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4514 | |
840cb59c | 4515 | health_code_update(); |
273ea72c DG |
4516 | } |
4517 | ||
139ac872 | 4518 | exit: |
5eb91c98 | 4519 | error: |
35df2755 CB |
4520 | if (sock >= 0) { |
4521 | ret = close(sock); | |
4522 | if (ret) { | |
4523 | PERROR("close"); | |
4524 | } | |
139ac872 | 4525 | } |
44a5e5eb | 4526 | |
35df2755 CB |
4527 | lttng_poll_clean(&events); |
4528 | clean_command_ctx(&cmd_ctx); | |
4529 | ||
4530 | error_listen: | |
4531 | error_create_poll: | |
e6142f2e | 4532 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4533 | if (client_sock >= 0) { |
4534 | ret = close(client_sock); | |
4535 | if (ret) { | |
4536 | PERROR("close"); | |
4537 | } | |
a4b35e07 | 4538 | } |
35df2755 CB |
4539 | |
4540 | if (err) { | |
840cb59c | 4541 | health_error(); |
35df2755 | 4542 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4543 | } |
273ea72c | 4544 | |
8782cc74 | 4545 | health_unregister(health_sessiond); |
35df2755 CB |
4546 | |
4547 | DBG("Client thread dying"); | |
f6a9efaa DG |
4548 | |
4549 | rcu_unregister_thread(); | |
4a15001e MD |
4550 | |
4551 | /* | |
4552 | * Since we are creating the consumer threads, we own them, so we need | |
4553 | * to join them before our thread exits. | |
4554 | */ | |
4555 | ret = join_consumer_thread(&kconsumer_data); | |
4556 | if (ret) { | |
4557 | errno = ret; | |
4558 | PERROR("join_consumer"); | |
4559 | } | |
4560 | ||
4561 | ret = join_consumer_thread(&ustconsumer32_data); | |
4562 | if (ret) { | |
4563 | errno = ret; | |
4564 | PERROR("join_consumer ust32"); | |
4565 | } | |
4566 | ||
4567 | ret = join_consumer_thread(&ustconsumer64_data); | |
4568 | if (ret) { | |
4569 | errno = ret; | |
4570 | PERROR("join_consumer ust64"); | |
4571 | } | |
1d4b027a DG |
4572 | return NULL; |
4573 | } | |
4574 | ||
c0232ea5 JG |
4575 | static int string_match(const char *str1, const char *str2) |
4576 | { | |
4577 | return (str1 && str2) && !strcmp(str1, str2); | |
4578 | } | |
4579 | ||
fac6795d | 4580 | /* |
26296c48 JG |
4581 | * Take an option from the getopt output and set it in the right variable to be |
4582 | * used later. | |
4583 | * | |
4584 | * Return 0 on success else a negative value. | |
fac6795d | 4585 | */ |
26296c48 | 4586 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4587 | { |
26296c48 | 4588 | int ret = 0; |
fac6795d | 4589 | |
c0232ea5 | 4590 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4591 | if (!arg || *arg == '\0') { |
4592 | ret = -EINVAL; | |
4593 | goto end; | |
4594 | } | |
e8fa9fb0 MD |
4595 | if (lttng_is_setuid_setgid()) { |
4596 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4597 | "-c, --client-sock"); | |
4598 | } else { | |
e6142f2e JG |
4599 | config_string_set(&config.client_unix_sock_path, |
4600 | strdup(arg)); | |
4601 | if (!config.client_unix_sock_path.value) { | |
4602 | ret = -ENOMEM; | |
4603 | PERROR("strdup"); | |
4604 | } | |
e8fa9fb0 | 4605 | } |
c0232ea5 | 4606 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4607 | if (!arg || *arg == '\0') { |
4608 | ret = -EINVAL; | |
4609 | goto end; | |
4610 | } | |
e8fa9fb0 MD |
4611 | if (lttng_is_setuid_setgid()) { |
4612 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4613 | "-a, --apps-sock"); | |
4614 | } else { | |
e6142f2e JG |
4615 | config_string_set(&config.apps_unix_sock_path, |
4616 | strdup(arg)); | |
4617 | if (!config.apps_unix_sock_path.value) { | |
4618 | ret = -ENOMEM; | |
4619 | PERROR("strdup"); | |
4620 | } | |
e8fa9fb0 | 4621 | } |
c0232ea5 | 4622 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4623 | config.daemonize = true; |
c0232ea5 | 4624 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4625 | config.background = true; |
c0232ea5 | 4626 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4627 | if (!arg || *arg == '\0') { |
4628 | ret = -EINVAL; | |
4629 | goto end; | |
4630 | } | |
e8fa9fb0 MD |
4631 | if (lttng_is_setuid_setgid()) { |
4632 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4633 | "-g, --group"); | |
4634 | } else { | |
e6142f2e JG |
4635 | config_string_set(&config.tracing_group_name, |
4636 | strdup(arg)); | |
4637 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 4638 | ret = -ENOMEM; |
e6142f2e | 4639 | PERROR("strdup"); |
e8fa9fb0 | 4640 | } |
db322c4d | 4641 | } |
c0232ea5 | 4642 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4643 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4644 | if (ret) { |
4fc83d94 | 4645 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4646 | perror("exec"); |
4647 | } | |
4648 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4649 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4650 | fprintf(stdout, "%s\n", VERSION); |
4651 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4652 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 4653 | config.sig_parent = true; |
c0232ea5 | 4654 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
4655 | if (!arg || *arg == '\0') { |
4656 | ret = -EINVAL; | |
4657 | goto end; | |
4658 | } | |
e8fa9fb0 MD |
4659 | if (lttng_is_setuid_setgid()) { |
4660 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4661 | "--kconsumerd-err-sock"); | |
4662 | } else { | |
e6142f2e JG |
4663 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
4664 | strdup(arg)); | |
4665 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
4666 | ret = -ENOMEM; | |
4667 | PERROR("strdup"); | |
4668 | } | |
e8fa9fb0 | 4669 | } |
c0232ea5 | 4670 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4671 | if (!arg || *arg == '\0') { |
4672 | ret = -EINVAL; | |
4673 | goto end; | |
4674 | } | |
e8fa9fb0 MD |
4675 | if (lttng_is_setuid_setgid()) { |
4676 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4677 | "--kconsumerd-cmd-sock"); | |
4678 | } else { | |
e6142f2e JG |
4679 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
4680 | strdup(arg)); | |
4681 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
4682 | ret = -ENOMEM; | |
4683 | PERROR("strdup"); | |
4684 | } | |
e8fa9fb0 | 4685 | } |
c0232ea5 | 4686 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
4687 | if (!arg || *arg == '\0') { |
4688 | ret = -EINVAL; | |
4689 | goto end; | |
4690 | } | |
e8fa9fb0 MD |
4691 | if (lttng_is_setuid_setgid()) { |
4692 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4693 | "--ustconsumerd64-err-sock"); | |
4694 | } else { | |
e6142f2e JG |
4695 | config_string_set(&config.consumerd64_err_unix_sock_path, |
4696 | strdup(arg)); | |
4697 | if (!config.consumerd64_err_unix_sock_path.value) { | |
4698 | ret = -ENOMEM; | |
4699 | PERROR("strdup"); | |
4700 | } | |
e8fa9fb0 | 4701 | } |
c0232ea5 | 4702 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
4703 | if (!arg || *arg == '\0') { |
4704 | ret = -EINVAL; | |
4705 | goto end; | |
4706 | } | |
e8fa9fb0 MD |
4707 | if (lttng_is_setuid_setgid()) { |
4708 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4709 | "--ustconsumerd64-cmd-sock"); | |
4710 | } else { | |
e6142f2e JG |
4711 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
4712 | strdup(arg)); | |
4713 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
4714 | ret = -ENOMEM; | |
4715 | PERROR("strdup"); | |
4716 | } | |
e8fa9fb0 | 4717 | } |
c0232ea5 | 4718 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
4719 | if (!arg || *arg == '\0') { |
4720 | ret = -EINVAL; | |
4721 | goto end; | |
4722 | } | |
e8fa9fb0 MD |
4723 | if (lttng_is_setuid_setgid()) { |
4724 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4725 | "--ustconsumerd32-err-sock"); | |
4726 | } else { | |
e6142f2e JG |
4727 | config_string_set(&config.consumerd32_err_unix_sock_path, |
4728 | strdup(arg)); | |
4729 | if (!config.consumerd32_err_unix_sock_path.value) { | |
4730 | ret = -ENOMEM; | |
4731 | PERROR("strdup"); | |
4732 | } | |
e8fa9fb0 | 4733 | } |
c0232ea5 | 4734 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
4735 | if (!arg || *arg == '\0') { |
4736 | ret = -EINVAL; | |
4737 | goto end; | |
4738 | } | |
e8fa9fb0 MD |
4739 | if (lttng_is_setuid_setgid()) { |
4740 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4741 | "--ustconsumerd32-cmd-sock"); | |
4742 | } else { | |
e6142f2e JG |
4743 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
4744 | strdup(arg)); | |
4745 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
4746 | ret = -ENOMEM; | |
4747 | PERROR("strdup"); | |
4748 | } | |
e8fa9fb0 | 4749 | } |
c0232ea5 | 4750 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 4751 | config.no_kernel = true; |
c0232ea5 | 4752 | } else if (string_match(optname, "quiet") || opt == 'q') { |
e6142f2e | 4753 | lttng_opt_quiet = true; |
c0232ea5 | 4754 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4755 | /* Verbose level can increase using multiple -v */ |
4756 | if (arg) { | |
13755a18 | 4757 | /* Value obtained from config file */ |
e6142f2e | 4758 | config.verbose = config_parse_value(arg); |
26296c48 | 4759 | } else { |
13755a18 | 4760 | /* -v used on command line */ |
e6142f2e | 4761 | config.verbose++; |
26296c48 | 4762 | } |
13755a18 | 4763 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
4764 | config.verbose = config.verbose < 0 ? 0 : |
4765 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 4766 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 4767 | if (arg) { |
e6142f2e | 4768 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 4769 | } else { |
e6142f2e | 4770 | config.verbose_consumer++; |
26296c48 | 4771 | } |
c0232ea5 | 4772 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
4773 | if (!arg || *arg == '\0') { |
4774 | ret = -EINVAL; | |
4775 | goto end; | |
4776 | } | |
e8fa9fb0 MD |
4777 | if (lttng_is_setuid_setgid()) { |
4778 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4779 | "--consumerd32-path"); | |
4780 | } else { | |
e6142f2e JG |
4781 | config_string_set(&config.consumerd32_bin_path, |
4782 | strdup(arg)); | |
4783 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
4784 | PERROR("strdup"); |
4785 | ret = -ENOMEM; | |
4786 | } | |
db322c4d | 4787 | } |
c0232ea5 | 4788 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
4789 | if (!arg || *arg == '\0') { |
4790 | ret = -EINVAL; | |
4791 | goto end; | |
4792 | } | |
e8fa9fb0 MD |
4793 | if (lttng_is_setuid_setgid()) { |
4794 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4795 | "--consumerd32-libdir"); | |
4796 | } else { | |
e6142f2e JG |
4797 | config_string_set(&config.consumerd32_lib_dir, |
4798 | strdup(arg)); | |
4799 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
4800 | PERROR("strdup"); |
4801 | ret = -ENOMEM; | |
4802 | } | |
db322c4d | 4803 | } |
c0232ea5 | 4804 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
4805 | if (!arg || *arg == '\0') { |
4806 | ret = -EINVAL; | |
4807 | goto end; | |
4808 | } | |
e8fa9fb0 MD |
4809 | if (lttng_is_setuid_setgid()) { |
4810 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4811 | "--consumerd64-path"); | |
4812 | } else { | |
e6142f2e JG |
4813 | config_string_set(&config.consumerd64_bin_path, |
4814 | strdup(arg)); | |
4815 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
4816 | PERROR("strdup"); |
4817 | ret = -ENOMEM; | |
4818 | } | |
db322c4d | 4819 | } |
c0232ea5 | 4820 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
4821 | if (!arg || *arg == '\0') { |
4822 | ret = -EINVAL; | |
4823 | goto end; | |
4824 | } | |
e8fa9fb0 MD |
4825 | if (lttng_is_setuid_setgid()) { |
4826 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4827 | "--consumerd64-libdir"); | |
4828 | } else { | |
e6142f2e JG |
4829 | config_string_set(&config.consumerd64_lib_dir, |
4830 | strdup(arg)); | |
4831 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
4832 | PERROR("strdup"); |
4833 | ret = -ENOMEM; | |
4834 | } | |
db322c4d | 4835 | } |
c0232ea5 | 4836 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
4837 | if (!arg || *arg == '\0') { |
4838 | ret = -EINVAL; | |
4839 | goto end; | |
4840 | } | |
e8fa9fb0 MD |
4841 | if (lttng_is_setuid_setgid()) { |
4842 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4843 | "-p, --pidfile"); | |
4844 | } else { | |
e6142f2e JG |
4845 | config_string_set(&config.pid_file_path, strdup(arg)); |
4846 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
4847 | PERROR("strdup"); |
4848 | ret = -ENOMEM; | |
4849 | } | |
db322c4d | 4850 | } |
c0232ea5 | 4851 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
4852 | if (!arg || *arg == '\0') { |
4853 | ret = -EINVAL; | |
4854 | goto end; | |
4855 | } | |
e8fa9fb0 MD |
4856 | if (lttng_is_setuid_setgid()) { |
4857 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4858 | "--agent-tcp-port"); | |
4859 | } else { | |
4860 | unsigned long v; | |
4d076222 | 4861 | |
e8fa9fb0 MD |
4862 | errno = 0; |
4863 | v = strtoul(arg, NULL, 0); | |
4864 | if (errno != 0 || !isdigit(arg[0])) { | |
4865 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4866 | return -1; | |
4867 | } | |
4868 | if (v == 0 || v >= 65535) { | |
4869 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4870 | return -1; | |
4871 | } | |
e6142f2e JG |
4872 | config.agent_tcp_port = (uint32_t) v; |
4873 | DBG3("Agent TCP port set to non default: %u", config.agent_tcp_port); | |
26296c48 | 4874 | } |
c0232ea5 | 4875 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
4876 | if (!arg || *arg == '\0') { |
4877 | ret = -EINVAL; | |
4878 | goto end; | |
4879 | } | |
e8fa9fb0 MD |
4880 | if (lttng_is_setuid_setgid()) { |
4881 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4882 | "-l, --load"); | |
4883 | } else { | |
e6142f2e JG |
4884 | config_string_set(&config.load_session_path, strdup(arg)); |
4885 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
4886 | PERROR("strdup"); |
4887 | ret = -ENOMEM; | |
4888 | } | |
ef367a93 | 4889 | } |
c0232ea5 | 4890 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
4891 | if (!arg || *arg == '\0') { |
4892 | ret = -EINVAL; | |
4893 | goto end; | |
4894 | } | |
e8fa9fb0 MD |
4895 | if (lttng_is_setuid_setgid()) { |
4896 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4897 | "--kmod-probes"); | |
4898 | } else { | |
e6142f2e JG |
4899 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
4900 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
4901 | PERROR("strdup"); |
4902 | ret = -ENOMEM; | |
4903 | } | |
c9d42407 | 4904 | } |
c0232ea5 | 4905 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
4906 | if (!arg || *arg == '\0') { |
4907 | ret = -EINVAL; | |
4908 | goto end; | |
4909 | } | |
e8fa9fb0 MD |
4910 | if (lttng_is_setuid_setgid()) { |
4911 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4912 | "--extra-kmod-probes"); | |
4913 | } else { | |
e6142f2e JG |
4914 | config_string_set(&config.kmod_extra_probes_list, |
4915 | strdup(arg)); | |
4916 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
4917 | PERROR("strdup"); |
4918 | ret = -ENOMEM; | |
4919 | } | |
db322c4d | 4920 | } |
c0232ea5 JG |
4921 | } else if (string_match(optname, "config") || opt == 'f') { |
4922 | /* This is handled in set_options() thus silent skip. */ | |
4923 | goto end; | |
4924 | } else { | |
26296c48 JG |
4925 | /* Unknown option or other error. |
4926 | * Error is printed by getopt, just return */ | |
4927 | ret = -1; | |
4928 | } | |
4929 | ||
f3dd7ce7 | 4930 | end: |
c5d350b2 JG |
4931 | if (ret == -EINVAL) { |
4932 | const char *opt_name = "unknown"; | |
4933 | int i; | |
4934 | ||
4935 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4936 | i++) { | |
4937 | if (opt == long_options[i].val) { | |
4938 | opt_name = long_options[i].name; | |
4939 | break; | |
4940 | } | |
4941 | } | |
4942 | ||
4943 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4944 | opt_name); | |
4945 | } | |
f3dd7ce7 | 4946 | |
26296c48 JG |
4947 | return ret; |
4948 | } | |
4949 | ||
4950 | /* | |
4951 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 4952 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
4953 | * return value conventions. |
4954 | */ | |
4955 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4956 | { | |
4957 | int ret = 0, i; | |
4958 | ||
4959 | if (!entry || !entry->name || !entry->value) { | |
4960 | ret = -EINVAL; | |
4961 | goto end; | |
4962 | } | |
4963 | ||
4964 | /* Check if the option is to be ignored */ | |
4965 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4966 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4967 | goto end; | |
4968 | } | |
4969 | } | |
4970 | ||
4971 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4972 | i++) { | |
4973 | ||
4974 | /* Ignore if not fully matched. */ | |
4975 | if (strcmp(entry->name, long_options[i].name)) { | |
4976 | continue; | |
4977 | } | |
4978 | ||
4979 | /* | |
4980 | * If the option takes no argument on the command line, we have to | |
4981 | * check if the value is "true". We support non-zero numeric values, | |
4982 | * true, on and yes. | |
4983 | */ | |
4984 | if (!long_options[i].has_arg) { | |
4985 | ret = config_parse_value(entry->value); | |
4986 | if (ret <= 0) { | |
4987 | if (ret) { | |
4988 | WARN("Invalid configuration value \"%s\" for option %s", | |
4989 | entry->value, entry->name); | |
4990 | } | |
4991 | /* False, skip boolean config option. */ | |
4992 | goto end; | |
4d076222 | 4993 | } |
26296c48 JG |
4994 | } |
4995 | ||
4996 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4997 | goto end; | |
4998 | } | |
4999 | ||
5000 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5001 | ||
5002 | end: | |
5003 | return ret; | |
5004 | } | |
5005 | ||
5006 | /* | |
5007 | * daemon configuration loading and argument parsing | |
5008 | */ | |
5009 | static int set_options(int argc, char **argv) | |
5010 | { | |
5011 | int ret = 0, c = 0, option_index = 0; | |
5012 | int orig_optopt = optopt, orig_optind = optind; | |
5013 | char *optstring; | |
5014 | const char *config_path = NULL; | |
5015 | ||
5016 | optstring = utils_generate_optstring(long_options, | |
5017 | sizeof(long_options) / sizeof(struct option)); | |
5018 | if (!optstring) { | |
5019 | ret = -ENOMEM; | |
5020 | goto end; | |
5021 | } | |
5022 | ||
5023 | /* Check for the --config option */ | |
5024 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5025 | &option_index)) != -1) { | |
5026 | if (c == '?') { | |
5027 | ret = -EINVAL; | |
5028 | goto end; | |
5029 | } else if (c != 'f') { | |
5030 | /* if not equal to --config option. */ | |
5031 | continue; | |
5032 | } | |
5033 | ||
e8fa9fb0 MD |
5034 | if (lttng_is_setuid_setgid()) { |
5035 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5036 | "-f, --config"); | |
5037 | } else { | |
5038 | config_path = utils_expand_path(optarg); | |
5039 | if (!config_path) { | |
5040 | ERR("Failed to resolve path: %s", optarg); | |
5041 | } | |
26296c48 JG |
5042 | } |
5043 | } | |
5044 | ||
5045 | ret = config_get_section_entries(config_path, config_section_name, | |
5046 | config_entry_handler, NULL); | |
5047 | if (ret) { | |
5048 | if (ret > 0) { | |
5049 | ERR("Invalid configuration option at line %i", ret); | |
5050 | ret = -1; | |
5051 | } | |
5052 | goto end; | |
5053 | } | |
5054 | ||
5055 | /* Reset getopt's global state */ | |
5056 | optopt = orig_optopt; | |
5057 | optind = orig_optind; | |
5058 | while (1) { | |
c0232ea5 JG |
5059 | option_index = -1; |
5060 | /* | |
5061 | * getopt_long() will not set option_index if it encounters a | |
5062 | * short option. | |
5063 | */ | |
5064 | c = getopt_long(argc, argv, optstring, long_options, | |
5065 | &option_index); | |
26296c48 | 5066 | if (c == -1) { |
4d076222 DG |
5067 | break; |
5068 | } | |
26296c48 | 5069 | |
c0232ea5 JG |
5070 | /* |
5071 | * Pass NULL as the long option name if popt left the index | |
5072 | * unset. | |
5073 | */ | |
5074 | ret = set_option(c, optarg, | |
5075 | option_index < 0 ? NULL : | |
5076 | long_options[option_index].name); | |
26296c48 JG |
5077 | if (ret < 0) { |
5078 | break; | |
fac6795d DG |
5079 | } |
5080 | } | |
5081 | ||
26296c48 JG |
5082 | end: |
5083 | free(optstring); | |
5084 | return ret; | |
fac6795d DG |
5085 | } |
5086 | ||
5087 | /* | |
d063d709 | 5088 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5089 | * apps_sock - The communication socket for all UST apps. |
5090 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5091 | */ |
cf3af59e | 5092 | static int init_daemon_socket(void) |
fac6795d DG |
5093 | { |
5094 | int ret = 0; | |
5095 | mode_t old_umask; | |
5096 | ||
5097 | old_umask = umask(0); | |
5098 | ||
5099 | /* Create client tool unix socket */ | |
e6142f2e | 5100 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5101 | if (client_sock < 0) { |
e6142f2e | 5102 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5103 | ret = -1; |
5104 | goto end; | |
5105 | } | |
5106 | ||
b662582b DG |
5107 | /* Set the cloexec flag */ |
5108 | ret = utils_set_fd_cloexec(client_sock); | |
5109 | if (ret < 0) { | |
5110 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5111 | "Continuing but note that the consumer daemon will have a " | |
5112 | "reference to this socket on exec()", client_sock); | |
5113 | } | |
5114 | ||
fac6795d | 5115 | /* File permission MUST be 660 */ |
e6142f2e | 5116 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5117 | if (ret < 0) { |
e6142f2e | 5118 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5119 | PERROR("chmod"); |
fac6795d DG |
5120 | goto end; |
5121 | } | |
5122 | ||
5123 | /* Create the application unix socket */ | |
e6142f2e | 5124 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5125 | if (apps_sock < 0) { |
e6142f2e | 5126 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5127 | ret = -1; |
5128 | goto end; | |
5129 | } | |
5130 | ||
b662582b DG |
5131 | /* Set the cloexec flag */ |
5132 | ret = utils_set_fd_cloexec(apps_sock); | |
5133 | if (ret < 0) { | |
5134 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5135 | "Continuing but note that the consumer daemon will have a " | |
5136 | "reference to this socket on exec()", apps_sock); | |
5137 | } | |
5138 | ||
d6f42150 | 5139 | /* File permission MUST be 666 */ |
e6142f2e | 5140 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5141 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5142 | if (ret < 0) { |
e6142f2e | 5143 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5144 | PERROR("chmod"); |
fac6795d DG |
5145 | goto end; |
5146 | } | |
5147 | ||
b662582b DG |
5148 | DBG3("Session daemon client socket %d and application socket %d created", |
5149 | client_sock, apps_sock); | |
5150 | ||
fac6795d DG |
5151 | end: |
5152 | umask(old_umask); | |
5153 | return ret; | |
5154 | } | |
5155 | ||
5156 | /* | |
54d01ffb DG |
5157 | * Check if the global socket is available, and if a daemon is answering at the |
5158 | * other side. If yes, error is returned. | |
fac6795d | 5159 | */ |
cf3af59e | 5160 | static int check_existing_daemon(void) |
fac6795d | 5161 | { |
7d8234d9 | 5162 | /* Is there anybody out there ? */ |
099e26bd | 5163 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5164 | return -EEXIST; |
099e26bd | 5165 | } |
b09c7c76 DG |
5166 | |
5167 | return 0; | |
fac6795d DG |
5168 | } |
5169 | ||
fac6795d | 5170 | /* |
d063d709 | 5171 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5172 | * |
d063d709 | 5173 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5174 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5175 | */ |
be040666 | 5176 | static int set_permissions(char *rundir) |
fac6795d DG |
5177 | { |
5178 | int ret; | |
996b65c8 | 5179 | gid_t gid; |
fac6795d | 5180 | |
e6142f2e | 5181 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5182 | |
d6f42150 | 5183 | /* Set lttng run dir */ |
be040666 | 5184 | ret = chown(rundir, 0, gid); |
d6f42150 | 5185 | if (ret < 0) { |
be040666 | 5186 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5187 | PERROR("chown"); |
d6f42150 DG |
5188 | } |
5189 | ||
6c71277b MD |
5190 | /* |
5191 | * Ensure all applications and tracing group can search the run | |
5192 | * dir. Allow everyone to read the directory, since it does not | |
5193 | * buy us anything to hide its content. | |
5194 | */ | |
5195 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5196 | if (ret < 0) { |
5197 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5198 | PERROR("chmod"); |
d1613cf5 JN |
5199 | } |
5200 | ||
d6f42150 | 5201 | /* lttng client socket path */ |
e6142f2e | 5202 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5203 | if (ret < 0) { |
e6142f2e | 5204 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5205 | PERROR("chown"); |
d6f42150 DG |
5206 | } |
5207 | ||
3bd1e081 | 5208 | /* kconsumer error socket path */ |
6c71277b | 5209 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5210 | if (ret < 0) { |
3bd1e081 | 5211 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5212 | PERROR("chown"); |
3bd1e081 MD |
5213 | } |
5214 | ||
7753dea8 | 5215 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5216 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5217 | if (ret < 0) { |
5218 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5219 | PERROR("chown"); |
7753dea8 MD |
5220 | } |
5221 | ||
5222 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5223 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5224 | if (ret < 0) { |
7753dea8 | 5225 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5226 | PERROR("chown"); |
fac6795d DG |
5227 | } |
5228 | ||
d6f42150 | 5229 | DBG("All permissions are set"); |
e07ae692 | 5230 | |
fac6795d DG |
5231 | return ret; |
5232 | } | |
5233 | ||
d6f42150 | 5234 | /* |
d063d709 | 5235 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5236 | */ |
e6142f2e | 5237 | static int create_lttng_rundir(void) |
d6f42150 DG |
5238 | { |
5239 | int ret; | |
5240 | ||
e6142f2e | 5241 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5242 | |
e6142f2e | 5243 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5244 | if (ret < 0) { |
b1f11e69 | 5245 | if (errno != EEXIST) { |
e6142f2e | 5246 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5247 | goto error; |
5248 | } else { | |
5249 | ret = 0; | |
5250 | } | |
d6f42150 DG |
5251 | } |
5252 | ||
5253 | error: | |
5254 | return ret; | |
5255 | } | |
5256 | ||
5257 | /* | |
e6142f2e | 5258 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5259 | * session daemon. |
d6f42150 | 5260 | */ |
e6142f2e | 5261 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5262 | { |
5263 | int ret; | |
e6142f2e | 5264 | char *path = NULL; |
d6f42150 | 5265 | |
6c71277b | 5266 | switch (consumer_data->type) { |
7753dea8 | 5267 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5268 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5269 | break; |
5270 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5271 | path = config.consumerd64_path.value; |
7753dea8 MD |
5272 | break; |
5273 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5274 | path = config.consumerd32_path.value; |
7753dea8 MD |
5275 | break; |
5276 | default: | |
5277 | ERR("Consumer type unknown"); | |
5278 | ret = -EINVAL; | |
5279 | goto error; | |
d6f42150 | 5280 | } |
e6142f2e | 5281 | assert(path); |
d6f42150 | 5282 | |
67e40797 DG |
5283 | DBG2("Creating consumer directory: %s", path); |
5284 | ||
6c71277b | 5285 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5286 | if (ret < 0 && errno != EEXIST) { |
5287 | PERROR("mkdir"); | |
5288 | ERR("Failed to create %s", path); | |
5289 | goto error; | |
d6f42150 | 5290 | } |
6c71277b | 5291 | if (is_root) { |
e6142f2e | 5292 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5293 | if (ret < 0) { |
5294 | ERR("Unable to set group on %s", path); | |
5295 | PERROR("chown"); | |
5296 | goto error; | |
5297 | } | |
5298 | } | |
d6f42150 | 5299 | |
e6142f2e | 5300 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5301 | consumer_data->err_sock = |
5302 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5303 | if (consumer_data->err_sock < 0) { | |
5304 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5305 | ret = -1; |
5306 | goto error; | |
5307 | } | |
5308 | ||
a24f05ab MD |
5309 | /* |
5310 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5311 | * show must go on. | |
5312 | */ | |
5313 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5314 | if (ret < 0) { | |
5315 | PERROR("utils_set_fd_cloexec"); | |
5316 | /* continue anyway */ | |
5317 | } | |
5318 | ||
d6f42150 | 5319 | /* File permission MUST be 660 */ |
3bd1e081 | 5320 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5321 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5322 | if (ret < 0) { |
3bd1e081 | 5323 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5324 | PERROR("chmod"); |
d6f42150 DG |
5325 | goto error; |
5326 | } | |
5327 | ||
5328 | error: | |
5329 | return ret; | |
5330 | } | |
5331 | ||
fac6795d | 5332 | /* |
d063d709 | 5333 | * Signal handler for the daemon |
cf3af59e | 5334 | * |
54d01ffb DG |
5335 | * Simply stop all worker threads, leaving main() return gracefully after |
5336 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5337 | */ |
5338 | static void sighandler(int sig) | |
5339 | { | |
5340 | switch (sig) { | |
cf3af59e | 5341 | case SIGINT: |
af87c45a | 5342 | DBG("SIGINT caught"); |
cf3af59e MD |
5343 | stop_threads(); |
5344 | break; | |
5345 | case SIGTERM: | |
af87c45a | 5346 | DBG("SIGTERM caught"); |
cf3af59e MD |
5347 | stop_threads(); |
5348 | break; | |
0bb7724a DG |
5349 | case SIGUSR1: |
5350 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5351 | break; | |
cf3af59e MD |
5352 | default: |
5353 | break; | |
fac6795d | 5354 | } |
fac6795d DG |
5355 | } |
5356 | ||
5357 | /* | |
d063d709 | 5358 | * Setup signal handler for : |
1d4b027a | 5359 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5360 | */ |
1d4b027a | 5361 | static int set_signal_handler(void) |
fac6795d | 5362 | { |
1d4b027a DG |
5363 | int ret = 0; |
5364 | struct sigaction sa; | |
5365 | sigset_t sigset; | |
fac6795d | 5366 | |
1d4b027a | 5367 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5368 | PERROR("sigemptyset"); |
1d4b027a DG |
5369 | return ret; |
5370 | } | |
d6f42150 | 5371 | |
1d4b027a DG |
5372 | sa.sa_mask = sigset; |
5373 | sa.sa_flags = 0; | |
0072e5e2 MD |
5374 | |
5375 | sa.sa_handler = sighandler; | |
1d4b027a | 5376 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5377 | PERROR("sigaction"); |
1d4b027a | 5378 | return ret; |
d6f42150 DG |
5379 | } |
5380 | ||
1d4b027a | 5381 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5382 | PERROR("sigaction"); |
1d4b027a | 5383 | return ret; |
d6f42150 | 5384 | } |
aaf26714 | 5385 | |
0072e5e2 | 5386 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5387 | PERROR("sigaction"); |
1d4b027a | 5388 | return ret; |
8c0faa1d DG |
5389 | } |
5390 | ||
0072e5e2 MD |
5391 | sa.sa_handler = SIG_IGN; |
5392 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5393 | PERROR("sigaction"); |
5394 | return ret; | |
5395 | } | |
5396 | ||
5397 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5398 | |
5399 | return ret; | |
fac6795d DG |
5400 | } |
5401 | ||
f3ed775e | 5402 | /* |
d063d709 | 5403 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5404 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5405 | */ |
5406 | static void set_ulimit(void) | |
5407 | { | |
5408 | int ret; | |
5409 | struct rlimit lim; | |
5410 | ||
514bb9f0 | 5411 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5412 | lim.rlim_cur = 65535; |
5413 | lim.rlim_max = 65535; | |
5414 | ||
5415 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5416 | if (ret < 0) { | |
76d7553f | 5417 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5418 | } |
5419 | } | |
5420 | ||
4a15001e | 5421 | static int write_pidfile(void) |
35f90c40 | 5422 | { |
e6142f2e | 5423 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5424 | } |
5425 | ||
c9cb3e7d JG |
5426 | /* |
5427 | * Create lockfile using the rundir and return its fd. | |
5428 | */ | |
5429 | static int create_lockfile(void) | |
5430 | { | |
e6142f2e | 5431 | return utils_create_lock_file(config.lock_file_path.value); |
c9cb3e7d JG |
5432 | } |
5433 | ||
cd9290dd | 5434 | /* |
022d91ba | 5435 | * Write agent TCP port using the rundir. |
cd9290dd | 5436 | */ |
4a15001e | 5437 | static int write_agent_port(void) |
cd9290dd | 5438 | { |
e6142f2e JG |
5439 | return utils_create_pid_file(config.agent_tcp_port, |
5440 | config.agent_port_file_path.value); | |
5441 | } | |
cd9290dd | 5442 | |
e6142f2e JG |
5443 | static int set_clock_plugin_env(void) |
5444 | { | |
5445 | int ret = 0; | |
5446 | char *env_value = NULL; | |
cd9290dd | 5447 | |
e6142f2e JG |
5448 | if (!config.lttng_ust_clock_plugin.value) { |
5449 | goto end; | |
5450 | } | |
5451 | ||
5452 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5453 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5454 | if (ret < 0) { |
e6142f2e JG |
5455 | PERROR("asprintf"); |
5456 | goto end; | |
cd9290dd DG |
5457 | } |
5458 | ||
e6142f2e JG |
5459 | ret = putenv(env_value); |
5460 | if (ret) { | |
5461 | free(env_value); | |
5462 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5463 | goto end; | |
5464 | } | |
cd9290dd | 5465 | |
e6142f2e JG |
5466 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5467 | config.lttng_ust_clock_plugin.value); | |
5468 | end: | |
4a15001e | 5469 | return ret; |
ef367a93 JG |
5470 | } |
5471 | ||
fac6795d DG |
5472 | /* |
5473 | * main | |
5474 | */ | |
5475 | int main(int argc, char **argv) | |
5476 | { | |
4a15001e | 5477 | int ret = 0, retval = 0; |
fac6795d | 5478 | void *status; |
e6142f2e | 5479 | const char *env_app_timeout; |
b3530820 JG |
5480 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5481 | *ust64_channel_monitor_pipe = NULL, | |
5482 | *kernel_channel_monitor_pipe = NULL; | |
6be1a386 | 5483 | bool notification_thread_running = false; |
db66e574 | 5484 | bool rotation_thread_running = false; |
62c43103 JD |
5485 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5486 | *ust64_channel_rotate_pipe = NULL, | |
5487 | *kernel_channel_rotate_pipe = NULL; | |
fac6795d | 5488 | |
335a95b7 MD |
5489 | init_kernel_workarounds(); |
5490 | ||
f6a9efaa DG |
5491 | rcu_register_thread(); |
5492 | ||
4a15001e MD |
5493 | if (set_signal_handler()) { |
5494 | retval = -1; | |
5495 | goto exit_set_signal_handler; | |
0bb7724a DG |
5496 | } |
5497 | ||
12744796 DG |
5498 | page_size = sysconf(_SC_PAGESIZE); |
5499 | if (page_size < 0) { | |
5500 | PERROR("sysconf _SC_PAGESIZE"); | |
5501 | page_size = LONG_MAX; | |
5502 | WARN("Fallback page size to %ld", page_size); | |
5503 | } | |
5504 | ||
e6142f2e JG |
5505 | ret = sessiond_config_init(&config); |
5506 | if (ret) { | |
5507 | retval = -1; | |
5508 | goto exit_set_signal_handler; | |
5509 | } | |
5510 | ||
4a15001e MD |
5511 | /* |
5512 | * Parse arguments and load the daemon configuration file. | |
5513 | * | |
5514 | * We have an exit_options exit path to free memory reserved by | |
5515 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5516 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5517 | * depends on set_options. | |
5518 | */ | |
fac6795d | 5519 | progname = argv[0]; |
4a15001e MD |
5520 | if (set_options(argc, argv)) { |
5521 | retval = -1; | |
5522 | goto exit_options; | |
fac6795d DG |
5523 | } |
5524 | ||
e6142f2e JG |
5525 | /* Init config from environment variables. */ |
5526 | sessiond_config_apply_env_config(&config); | |
5527 | ||
5528 | /* | |
5529 | * Resolve all paths received as arguments, configuration option, or | |
5530 | * through environment variable as absolute paths. This is necessary | |
5531 | * since daemonizing causes the sessiond's current working directory | |
5532 | * to '/'. | |
5533 | */ | |
5534 | ret = sessiond_config_resolve_paths(&config); | |
5535 | if (ret) { | |
5536 | goto exit_options; | |
5537 | } | |
5538 | ||
5539 | /* Apply config. */ | |
5540 | lttng_opt_verbose = config.verbose; | |
5541 | lttng_opt_quiet = config.quiet; | |
5542 | kconsumer_data.err_unix_sock_path = | |
5543 | config.kconsumerd_err_unix_sock_path.value; | |
5544 | kconsumer_data.cmd_unix_sock_path = | |
5545 | config.kconsumerd_cmd_unix_sock_path.value; | |
5546 | ustconsumer32_data.err_unix_sock_path = | |
5547 | config.consumerd32_err_unix_sock_path.value; | |
5548 | ustconsumer32_data.cmd_unix_sock_path = | |
5549 | config.consumerd32_cmd_unix_sock_path.value; | |
5550 | ustconsumer64_data.err_unix_sock_path = | |
5551 | config.consumerd64_err_unix_sock_path.value; | |
5552 | ustconsumer64_data.cmd_unix_sock_path = | |
5553 | config.consumerd64_cmd_unix_sock_path.value; | |
5554 | set_clock_plugin_env(); | |
5555 | ||
5556 | sessiond_config_log(&config); | |
5557 | ||
fac6795d | 5558 | /* Daemonize */ |
e6142f2e | 5559 | if (config.daemonize || config.background) { |
ceed52b5 MD |
5560 | int i; |
5561 | ||
72dd7491 | 5562 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 5563 | !config.background); |
53094c05 | 5564 | if (ret < 0) { |
4a15001e MD |
5565 | retval = -1; |
5566 | goto exit_options; | |
53094c05 | 5567 | } |
0bb7724a | 5568 | |
ceed52b5 | 5569 | /* |
0bb7724a | 5570 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5571 | * closed, in case we are called with more opened file |
5572 | * descriptors than the standard ones. | |
ceed52b5 MD |
5573 | */ |
5574 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5575 | (void) close(i); | |
5576 | } | |
5577 | } | |
5578 | ||
7567352f MD |
5579 | if (run_as_create_worker(argv[0]) < 0) { |
5580 | goto exit_create_run_as_worker_cleanup; | |
5581 | } | |
5582 | ||
4a15001e MD |
5583 | /* |
5584 | * Starting from here, we can create threads. This needs to be after | |
5585 | * lttng_daemonize due to RCU. | |
5586 | */ | |
5587 | ||
5588 | /* | |
5589 | * Initialize the health check subsystem. This call should set the | |
5590 | * appropriate time values. | |
5591 | */ | |
5592 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5593 | if (!health_sessiond) { | |
5594 | PERROR("health_app_create error"); | |
5595 | retval = -1; | |
5596 | goto exit_health_sessiond_cleanup; | |
5597 | } | |
5598 | ||
4a15001e | 5599 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5600 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5601 | retval = -1; |
5602 | goto exit_ht_cleanup; | |
5603 | } | |
5604 | ||
ceed52b5 | 5605 | /* Create thread quit pipe */ |
4a15001e MD |
5606 | if (init_thread_quit_pipe()) { |
5607 | retval = -1; | |
5608 | goto exit_init_data; | |
fac6795d DG |
5609 | } |
5610 | ||
5611 | /* Check if daemon is UID = 0 */ | |
5612 | is_root = !getuid(); | |
5613 | ||
b723c447 JG |
5614 | if (create_lttng_rundir()) { |
5615 | retval = -1; | |
5616 | goto exit_init_data; | |
5617 | } | |
5618 | ||
fac6795d | 5619 | if (is_root) { |
67e40797 | 5620 | /* Create global run dir with root access */ |
67e40797 | 5621 | |
b3530820 JG |
5622 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
5623 | if (!kernel_channel_monitor_pipe) { | |
5624 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
5625 | retval = -1; | |
5626 | goto exit_init_data; | |
5627 | } | |
5628 | kconsumer_data.channel_monitor_pipe = | |
5629 | lttng_pipe_release_writefd( | |
5630 | kernel_channel_monitor_pipe); | |
5631 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
5632 | retval = -1; | |
5633 | goto exit_init_data; | |
5634 | } | |
62c43103 JD |
5635 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
5636 | if (!kernel_channel_rotate_pipe) { | |
5637 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
5638 | retval = -1; | |
5639 | goto exit_init_data; | |
5640 | } | |
5641 | kconsumer_data.channel_rotate_pipe = | |
5642 | lttng_pipe_release_writefd( | |
5643 | kernel_channel_rotate_pipe); | |
5644 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
5645 | retval = -1; | |
5646 | goto exit_init_data; | |
5647 | } | |
fac6795d DG |
5648 | } |
5649 | ||
c9cb3e7d JG |
5650 | lockfile_fd = create_lockfile(); |
5651 | if (lockfile_fd < 0) { | |
4a15001e MD |
5652 | retval = -1; |
5653 | goto exit_init_data; | |
c9cb3e7d JG |
5654 | } |
5655 | ||
5c827ce0 DG |
5656 | /* Set consumer initial state */ |
5657 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5658 | ust_consumerd_state = CONSUMER_STOPPED; | |
5659 | ||
b3530820 JG |
5660 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
5661 | if (!ust32_channel_monitor_pipe) { | |
5662 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
5663 | retval = -1; | |
5664 | goto exit_init_data; | |
5665 | } | |
5666 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5667 | ust32_channel_monitor_pipe); | |
5668 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
5669 | retval = -1; | |
5670 | goto exit_init_data; | |
5671 | } | |
62c43103 JD |
5672 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
5673 | if (!ust32_channel_rotate_pipe) { | |
5674 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
5675 | retval = -1; | |
5676 | goto exit_init_data; | |
5677 | } | |
5678 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
5679 | ust32_channel_rotate_pipe); | |
5680 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
5681 | retval = -1; | |
5682 | goto exit_init_data; | |
5683 | } | |
5684 | ||
67e40797 | 5685 | |
b3530820 JG |
5686 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
5687 | if (!ust64_channel_monitor_pipe) { | |
5688 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
5689 | retval = -1; | |
5690 | goto exit_init_data; | |
5691 | } | |
5692 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5693 | ust64_channel_monitor_pipe); | |
5694 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
5695 | retval = -1; | |
5696 | goto exit_init_data; | |
5697 | } | |
62c43103 JD |
5698 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
5699 | if (!ust64_channel_rotate_pipe) { | |
5700 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
5701 | retval = -1; | |
5702 | goto exit_init_data; | |
5703 | } | |
5704 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
5705 | ust64_channel_rotate_pipe); | |
5706 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
5707 | retval = -1; | |
5708 | goto exit_init_data; | |
5709 | } | |
847177cd | 5710 | |
273ea72c | 5711 | /* |
7d8234d9 | 5712 | * See if daemon already exist. |
fac6795d | 5713 | */ |
4a15001e | 5714 | if (check_existing_daemon()) { |
75462a81 | 5715 | ERR("Already running daemon.\n"); |
273ea72c | 5716 | /* |
cf3af59e MD |
5717 | * We do not goto exit because we must not cleanup() |
5718 | * because a daemon is already running. | |
ab118b20 | 5719 | */ |
4a15001e MD |
5720 | retval = -1; |
5721 | goto exit_init_data; | |
a88df331 DG |
5722 | } |
5723 | ||
1427f9b2 DG |
5724 | /* |
5725 | * Init UST app hash table. Alloc hash table before this point since | |
5726 | * cleanup() can get called after that point. | |
5727 | */ | |
4a15001e | 5728 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5729 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5730 | retval = -1; |
5731 | goto exit_init_data; | |
5732 | } | |
1427f9b2 | 5733 | |
6a4e4039 JG |
5734 | /* |
5735 | * Initialize agent app hash table. We allocate the hash table here | |
5736 | * since cleanup() can get called after this point. | |
5737 | */ | |
5738 | if (agent_app_ht_alloc()) { | |
5739 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5740 | retval = -1; |
5741 | goto exit_init_data; | |
f20baf8e DG |
5742 | } |
5743 | ||
a88df331 DG |
5744 | /* |
5745 | * These actions must be executed as root. We do that *after* setting up | |
5746 | * the sockets path because we MUST make the check for another daemon using | |
5747 | * those paths *before* trying to set the kernel consumer sockets and init | |
5748 | * kernel tracer. | |
5749 | */ | |
5750 | if (is_root) { | |
e6142f2e | 5751 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
5752 | retval = -1; |
5753 | goto exit_init_data; | |
7753dea8 MD |
5754 | } |
5755 | ||
a88df331 | 5756 | /* Setup kernel tracer */ |
e6142f2e | 5757 | if (!config.no_kernel) { |
4fba7219 | 5758 | init_kernel_tracer(); |
89588270 DG |
5759 | if (kernel_tracer_fd >= 0) { |
5760 | ret = syscall_init_table(); | |
5761 | if (ret < 0) { | |
4a15001e MD |
5762 | ERR("Unable to populate syscall table. " |
5763 | "Syscall tracing won't work " | |
5764 | "for this session daemon."); | |
89588270 | 5765 | } |
834978fd | 5766 | } |
4fba7219 | 5767 | } |
a88df331 DG |
5768 | |
5769 | /* Set ulimit for open files */ | |
5770 | set_ulimit(); | |
fac6795d | 5771 | } |
4063050c MD |
5772 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5773 | lttng_fd_init(); | |
fac6795d | 5774 | |
e6142f2e | 5775 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
5776 | retval = -1; |
5777 | goto exit_init_data; | |
67e40797 DG |
5778 | } |
5779 | ||
e6142f2e | 5780 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
5781 | retval = -1; |
5782 | goto exit_init_data; | |
67e40797 DG |
5783 | } |
5784 | ||
d6f42150 | 5785 | /* Setup the needed unix socket */ |
4a15001e MD |
5786 | if (init_daemon_socket()) { |
5787 | retval = -1; | |
5788 | goto exit_init_data; | |
fac6795d DG |
5789 | } |
5790 | ||
5791 | /* Set credentials to socket */ | |
e6142f2e | 5792 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
5793 | retval = -1; |
5794 | goto exit_init_data; | |
fac6795d DG |
5795 | } |
5796 | ||
5b8719f5 | 5797 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 5798 | if (config.sig_parent) { |
5b8719f5 DG |
5799 | ppid = getppid(); |
5800 | } | |
5801 | ||
7a485870 | 5802 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 5803 | if (is_root && !config.no_kernel) { |
4a15001e MD |
5804 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5805 | retval = -1; | |
5806 | goto exit_init_data; | |
6620da75 | 5807 | } |
7a485870 DG |
5808 | } |
5809 | ||
099e26bd | 5810 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5811 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5812 | retval = -1; | |
5813 | goto exit_init_data; | |
099e26bd DG |
5814 | } |
5815 | ||
d0b96690 | 5816 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5817 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5818 | retval = -1; | |
5819 | goto exit_init_data; | |
d0b96690 DG |
5820 | } |
5821 | ||
7972aab2 DG |
5822 | /* Initialize global buffer per UID and PID registry. */ |
5823 | buffer_reg_init_uid_registry(); | |
5824 | buffer_reg_init_pid_registry(); | |
5825 | ||
099e26bd | 5826 | /* Init UST command queue. */ |
8bdee6e2 | 5827 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5828 | |
273ea72c | 5829 | /* |
4a15001e MD |
5830 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5831 | * is statically declared in session.c | |
273ea72c | 5832 | */ |
54d01ffb | 5833 | session_list_ptr = session_get_list(); |
b5541356 | 5834 | |
2f77fc4b | 5835 | cmd_init(); |
00e2e675 | 5836 | |
ae9e45b3 DG |
5837 | /* Check for the application socket timeout env variable. */ |
5838 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5839 | if (env_app_timeout) { | |
e6142f2e | 5840 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 5841 | } else { |
e6142f2e | 5842 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
5843 | } |
5844 | ||
4a15001e MD |
5845 | ret = write_pidfile(); |
5846 | if (ret) { | |
5847 | ERR("Error in write_pidfile"); | |
5848 | retval = -1; | |
5849 | goto exit_init_data; | |
5850 | } | |
5851 | ret = write_agent_port(); | |
5852 | if (ret) { | |
5853 | ERR("Error in write_agent_port"); | |
5854 | retval = -1; | |
5855 | goto exit_init_data; | |
5856 | } | |
35f90c40 | 5857 | |
554831e7 MD |
5858 | /* Initialize communication library */ |
5859 | lttcomm_init(); | |
4a15001e | 5860 | /* Initialize TCP timeout values */ |
d831c249 | 5861 | lttcomm_inet_init(); |
554831e7 | 5862 | |
ef367a93 | 5863 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5864 | retval = -1; |
5865 | goto exit_init_data; | |
ef367a93 | 5866 | } |
e6142f2e | 5867 | load_info->path = config.load_session_path.value; |
ef367a93 | 5868 | |
12b4fb37 | 5869 | /* Create health-check thread. */ |
1a1a34b4 | 5870 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 5871 | thread_manage_health, (void *) NULL); |
4a15001e MD |
5872 | if (ret) { |
5873 | errno = ret; | |
44a5e5eb | 5874 | PERROR("pthread_create health"); |
4a15001e | 5875 | retval = -1; |
44a5e5eb DG |
5876 | goto exit_health; |
5877 | } | |
5878 | ||
b3530820 JG |
5879 | /* notification_thread_data acquires the pipes' read side. */ |
5880 | notification_thread_handle = notification_thread_handle_create( | |
5881 | ust32_channel_monitor_pipe, | |
5882 | ust64_channel_monitor_pipe, | |
5883 | kernel_channel_monitor_pipe); | |
5884 | if (!notification_thread_handle) { | |
5885 | retval = -1; | |
5886 | ERR("Failed to create notification thread shared data"); | |
5887 | stop_threads(); | |
5888 | goto exit_notification; | |
5889 | } | |
5890 | ||
5891 | /* Create notification thread. */ | |
5892 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
5893 | thread_notification, notification_thread_handle); | |
5894 | if (ret) { | |
5895 | errno = ret; | |
5896 | PERROR("pthread_create notification"); | |
5897 | retval = -1; | |
5898 | stop_threads(); | |
5899 | goto exit_notification; | |
5900 | } | |
6be1a386 | 5901 | notification_thread_running = true; |
b3530820 | 5902 | |
db66e574 JD |
5903 | /* rotation_thread_data acquires the pipes' read side. */ |
5904 | rotation_thread_handle = rotation_thread_handle_create( | |
5905 | ust32_channel_rotate_pipe, | |
5906 | ust64_channel_rotate_pipe, | |
5907 | kernel_channel_rotate_pipe, | |
5908 | thread_quit_pipe[0]); | |
5909 | if (!rotation_thread_handle) { | |
5910 | retval = -1; | |
5911 | ERR("Failed to create rotation thread shared data"); | |
5912 | stop_threads(); | |
5913 | goto exit_rotation; | |
5914 | } | |
5915 | rotation_thread_running = true; | |
5916 | ||
5917 | /* Create rotation thread. */ | |
5918 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
5919 | thread_rotation, rotation_thread_handle); | |
5920 | if (ret) { | |
5921 | errno = ret; | |
5922 | PERROR("pthread_create rotation"); | |
5923 | retval = -1; | |
5924 | stop_threads(); | |
5925 | goto exit_rotation; | |
5926 | } | |
5927 | ||
cf3af59e | 5928 | /* Create thread to manage the client socket */ |
1a1a34b4 | 5929 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 5930 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
5931 | if (ret) { |
5932 | errno = ret; | |
76d7553f | 5933 | PERROR("pthread_create clients"); |
4a15001e | 5934 | retval = -1; |
b3530820 | 5935 | stop_threads(); |
cf3af59e MD |
5936 | goto exit_client; |
5937 | } | |
fac6795d | 5938 | |
099e26bd | 5939 | /* Create thread to dispatch registration */ |
1a1a34b4 | 5940 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 5941 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
5942 | if (ret) { |
5943 | errno = ret; | |
76d7553f | 5944 | PERROR("pthread_create dispatch"); |
4a15001e | 5945 | retval = -1; |
b3530820 | 5946 | stop_threads(); |
099e26bd DG |
5947 | goto exit_dispatch; |
5948 | } | |
5949 | ||
5950 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 5951 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 5952 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
5953 | if (ret) { |
5954 | errno = ret; | |
76d7553f | 5955 | PERROR("pthread_create registration"); |
4a15001e | 5956 | retval = -1; |
b3530820 | 5957 | stop_threads(); |
099e26bd DG |
5958 | goto exit_reg_apps; |
5959 | } | |
5960 | ||
cf3af59e | 5961 | /* Create thread to manage application socket */ |
1a1a34b4 | 5962 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 5963 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
5964 | if (ret) { |
5965 | errno = ret; | |
d0b96690 | 5966 | PERROR("pthread_create apps"); |
4a15001e | 5967 | retval = -1; |
b3530820 | 5968 | stop_threads(); |
d0b96690 DG |
5969 | goto exit_apps; |
5970 | } | |
5971 | ||
5972 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 5973 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 5974 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
5975 | if (ret) { |
5976 | errno = ret; | |
f5c32ef1 | 5977 | PERROR("pthread_create notify"); |
4a15001e | 5978 | retval = -1; |
b3530820 | 5979 | stop_threads(); |
9563b0ad | 5980 | goto exit_apps_notify; |
cf3af59e | 5981 | } |
fac6795d | 5982 | |
022d91ba | 5983 | /* Create agent registration thread. */ |
1a1a34b4 | 5984 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 5985 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
5986 | if (ret) { |
5987 | errno = ret; | |
022d91ba | 5988 | PERROR("pthread_create agent"); |
4a15001e | 5989 | retval = -1; |
b3530820 | 5990 | stop_threads(); |
022d91ba | 5991 | goto exit_agent_reg; |
4d076222 DG |
5992 | } |
5993 | ||
6620da75 | 5994 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 5995 | if (is_root && !config.no_kernel) { |
6620da75 | 5996 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 5997 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 5998 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
5999 | if (ret) { |
6000 | errno = ret; | |
6620da75 | 6001 | PERROR("pthread_create kernel"); |
4a15001e | 6002 | retval = -1; |
b3530820 | 6003 | stop_threads(); |
6620da75 DG |
6004 | goto exit_kernel; |
6005 | } | |
ef367a93 | 6006 | } |
7a485870 | 6007 | |
4a15001e | 6008 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6009 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6010 | thread_load_session, load_info); | |
4a15001e MD |
6011 | if (ret) { |
6012 | errno = ret; | |
6013 | PERROR("pthread_create load_session_thread"); | |
6014 | retval = -1; | |
b3530820 | 6015 | stop_threads(); |
4a15001e MD |
6016 | goto exit_load_session; |
6017 | } | |
6018 | ||
6019 | /* | |
6020 | * This is where we start awaiting program completion (e.g. through | |
6021 | * signal that asks threads to teardown). | |
6022 | */ | |
6023 | ||
6024 | ret = pthread_join(load_session_thread, &status); | |
6025 | if (ret) { | |
6026 | errno = ret; | |
6027 | PERROR("pthread_join load_session_thread"); | |
6028 | retval = -1; | |
6029 | } | |
6030 | exit_load_session: | |
ef367a93 | 6031 | |
e6142f2e | 6032 | if (is_root && !config.no_kernel) { |
6620da75 | 6033 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6034 | if (ret) { |
6035 | errno = ret; | |
6620da75 | 6036 | PERROR("pthread_join"); |
4a15001e | 6037 | retval = -1; |
6620da75 | 6038 | } |
fac6795d | 6039 | } |
cf3af59e | 6040 | exit_kernel: |
4a15001e | 6041 | |
022d91ba | 6042 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6043 | if (ret) { |
6044 | errno = ret; | |
022d91ba | 6045 | PERROR("pthread_join agent"); |
4a15001e | 6046 | retval = -1; |
4d076222 | 6047 | } |
022d91ba | 6048 | exit_agent_reg: |
4a15001e | 6049 | |
9563b0ad | 6050 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6051 | if (ret) { |
6052 | errno = ret; | |
9563b0ad | 6053 | PERROR("pthread_join apps notify"); |
4a15001e | 6054 | retval = -1; |
9563b0ad | 6055 | } |
9563b0ad | 6056 | exit_apps_notify: |
4a15001e | 6057 | |
cf3af59e | 6058 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6059 | if (ret) { |
6060 | errno = ret; | |
9563b0ad | 6061 | PERROR("pthread_join apps"); |
4a15001e | 6062 | retval = -1; |
cf3af59e | 6063 | } |
cf3af59e | 6064 | exit_apps: |
4a15001e | 6065 | |
099e26bd | 6066 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6067 | if (ret) { |
6068 | errno = ret; | |
76d7553f | 6069 | PERROR("pthread_join"); |
4a15001e | 6070 | retval = -1; |
099e26bd | 6071 | } |
099e26bd | 6072 | exit_reg_apps: |
4a15001e | 6073 | |
772b8f4d MD |
6074 | /* |
6075 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6076 | * we don't leak applications in the queue. | |
6077 | */ | |
099e26bd | 6078 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6079 | if (ret) { |
6080 | errno = ret; | |
76d7553f | 6081 | PERROR("pthread_join"); |
4a15001e | 6082 | retval = -1; |
099e26bd | 6083 | } |
099e26bd | 6084 | exit_dispatch: |
4a15001e | 6085 | |
cf3af59e | 6086 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6087 | if (ret) { |
6088 | errno = ret; | |
76d7553f | 6089 | PERROR("pthread_join"); |
4a15001e | 6090 | retval = -1; |
cf3af59e | 6091 | } |
a88df331 | 6092 | |
b3530820 | 6093 | exit_client: |
db66e574 | 6094 | exit_rotation: |
b3530820 | 6095 | exit_notification: |
4a15001e MD |
6096 | ret = pthread_join(health_thread, &status); |
6097 | if (ret) { | |
6098 | errno = ret; | |
6099 | PERROR("pthread_join health thread"); | |
6100 | retval = -1; | |
06f525de DG |
6101 | } |
6102 | ||
b3530820 | 6103 | exit_health: |
4a15001e | 6104 | exit_init_data: |
4d62fbf8 MD |
6105 | /* |
6106 | * Wait for all pending call_rcu work to complete before tearing | |
6107 | * down data structures. call_rcu worker may be trying to | |
6108 | * perform lookups in those structures. | |
6109 | */ | |
6110 | rcu_barrier(); | |
4a15001e MD |
6111 | /* |
6112 | * sessiond_cleanup() is called when no other thread is running, except | |
6113 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6114 | */ | |
6115 | rcu_thread_online(); | |
6116 | sessiond_cleanup(); | |
06f525de | 6117 | |
c4d5de9d JG |
6118 | /* |
6119 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6120 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6121 | * the queue is empty before shutting down the clean-up thread. | |
6122 | */ | |
6123 | rcu_barrier(); | |
6124 | ||
b3530820 JG |
6125 | /* |
6126 | * The teardown of the notification system is performed after the | |
6127 | * session daemon's teardown in order to allow it to be notified | |
6128 | * of the active session and channels at the moment of the teardown. | |
6129 | */ | |
6130 | if (notification_thread_handle) { | |
6be1a386 JG |
6131 | if (notification_thread_running) { |
6132 | notification_thread_command_quit( | |
6133 | notification_thread_handle); | |
6134 | ret = pthread_join(notification_thread, &status); | |
6135 | if (ret) { | |
6136 | errno = ret; | |
6137 | PERROR("pthread_join notification thread"); | |
6138 | retval = -1; | |
6139 | } | |
3dec304b | 6140 | } |
6be1a386 | 6141 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6142 | } |
6143 | ||
db66e574 JD |
6144 | if (rotation_thread_handle) { |
6145 | if (rotation_thread_running) { | |
6146 | ret = pthread_join(rotation_thread, &status); | |
6147 | if (ret) { | |
6148 | errno = ret; | |
6149 | PERROR("pthread_join rotation thread"); | |
6150 | retval = -1; | |
6151 | } | |
6152 | } | |
6153 | rotation_thread_handle_destroy(rotation_thread_handle); | |
6154 | } | |
6155 | ||
b3530820 JG |
6156 | rcu_thread_offline(); |
6157 | rcu_unregister_thread(); | |
6158 | ||
5e97de00 | 6159 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6160 | if (ret) { |
4a15001e | 6161 | retval = -1; |
0b2dc8df | 6162 | } |
b3530820 JG |
6163 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6164 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6165 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
62c43103 JD |
6166 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6167 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6168 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6169 | exit_ht_cleanup: |
4a15001e | 6170 | |
4a15001e MD |
6171 | health_app_destroy(health_sessiond); |
6172 | exit_health_sessiond_cleanup: | |
7567352f | 6173 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6174 | |
6175 | exit_options: | |
6176 | sessiond_cleanup_options(); | |
6177 | ||
6178 | exit_set_signal_handler: | |
6179 | if (!retval) { | |
cf3af59e | 6180 | exit(EXIT_SUCCESS); |
4a15001e MD |
6181 | } else { |
6182 | exit(EXIT_FAILURE); | |
67e40797 | 6183 | } |
fac6795d | 6184 | } |