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> |
a24248b3 | 52 | #include <common/dynamic-buffer.h> |
fac6795d | 53 | |
10a8a223 | 54 | #include "lttng-sessiond.h" |
7972aab2 | 55 | #include "buffer-registry.h" |
54d01ffb | 56 | #include "channel.h" |
2f77fc4b | 57 | #include "cmd.h" |
00e2e675 | 58 | #include "consumer.h" |
099e26bd | 59 | #include "context.h" |
54d01ffb | 60 | #include "event.h" |
4771f025 | 61 | #include "kernel.h" |
f1e16794 | 62 | #include "kernel-consumer.h" |
096102bd | 63 | #include "modprobe.h" |
0fdd1e2c | 64 | #include "shm.h" |
1e307fab | 65 | #include "ust-ctl.h" |
00e2e675 | 66 | #include "ust-consumer.h" |
8e68d1c8 | 67 | #include "utils.h" |
4063050c | 68 | #include "fd-limit.h" |
8782cc74 | 69 | #include "health-sessiond.h" |
8ac94142 | 70 | #include "testpoint.h" |
d0b96690 | 71 | #include "ust-thread.h" |
022d91ba | 72 | #include "agent-thread.h" |
fb198a11 | 73 | #include "save.h" |
ef367a93 | 74 | #include "load-session-thread.h" |
b3530820 JG |
75 | #include "notification-thread.h" |
76 | #include "notification-thread-commands.h" | |
db66e574 | 77 | #include "rotation-thread.h" |
0dbc2034 | 78 | #include "lttng-syscall.h" |
7c1d2758 | 79 | #include "agent.h" |
5e97de00 | 80 | #include "ht-cleanup.h" |
e6142f2e | 81 | #include "sessiond-config.h" |
d086f507 | 82 | #include "sessiond-timer.h" |
ebaeda94 | 83 | |
4fc83d94 PP |
84 | static const char *help_msg = |
85 | #ifdef LTTNG_EMBED_HELP | |
86 | #include <lttng-sessiond.8.h> | |
87 | #else | |
88 | NULL | |
89 | #endif | |
90 | ; | |
91 | ||
fac6795d | 92 | const char *progname; |
1d4b027a | 93 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 94 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
c9cb3e7d | 95 | static int lockfile_fd = -1; |
3bd1e081 | 96 | |
0bb7724a DG |
97 | /* Set to 1 when a SIGUSR1 signal is received. */ |
98 | static int recv_child_signal; | |
99 | ||
88076e89 JD |
100 | static struct lttng_kernel_tracer_version kernel_tracer_version; |
101 | static struct lttng_kernel_tracer_abi_version kernel_tracer_abi_version; | |
102 | ||
a23ec3a7 DG |
103 | /* |
104 | * Consumer daemon specific control data. Every value not initialized here is | |
105 | * set to 0 by the static definition. | |
106 | */ | |
3bd1e081 MD |
107 | static struct consumer_data kconsumer_data = { |
108 | .type = LTTNG_CONSUMER_KERNEL, | |
03550b58 MD |
109 | .err_sock = -1, |
110 | .cmd_sock = -1, | |
b3530820 | 111 | .channel_monitor_pipe = -1, |
62c43103 | 112 | .channel_rotate_pipe = -1, |
173af62f DG |
113 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
114 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
115 | .cond = PTHREAD_COND_INITIALIZER, |
116 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 117 | }; |
7753dea8 MD |
118 | static struct consumer_data ustconsumer64_data = { |
119 | .type = LTTNG_CONSUMER64_UST, | |
03550b58 MD |
120 | .err_sock = -1, |
121 | .cmd_sock = -1, | |
b3530820 | 122 | .channel_monitor_pipe = -1, |
62c43103 | 123 | .channel_rotate_pipe = -1, |
173af62f DG |
124 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
125 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
126 | .cond = PTHREAD_COND_INITIALIZER, |
127 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
128 | }; |
129 | static struct consumer_data ustconsumer32_data = { | |
130 | .type = LTTNG_CONSUMER32_UST, | |
03550b58 MD |
131 | .err_sock = -1, |
132 | .cmd_sock = -1, | |
b3530820 | 133 | .channel_monitor_pipe = -1, |
62c43103 | 134 | .channel_rotate_pipe = -1, |
173af62f DG |
135 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
136 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
137 | .cond = PTHREAD_COND_INITIALIZER, |
138 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
139 | }; |
140 | ||
26296c48 JG |
141 | /* Command line options */ |
142 | static const struct option long_options[] = { | |
0f5ea17c JG |
143 | { "client-sock", required_argument, 0, 'c' }, |
144 | { "apps-sock", required_argument, 0, 'a' }, | |
145 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
146 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
147 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
148 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
149 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
150 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
151 | { "consumerd32-path", required_argument, 0, '\0' }, | |
152 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
153 | { "consumerd64-path", required_argument, 0, '\0' }, | |
154 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
155 | { "daemonize", no_argument, 0, 'd' }, | |
156 | { "background", no_argument, 0, 'b' }, | |
157 | { "sig-parent", no_argument, 0, 'S' }, | |
158 | { "help", no_argument, 0, 'h' }, | |
159 | { "group", required_argument, 0, 'g' }, | |
160 | { "version", no_argument, 0, 'V' }, | |
161 | { "quiet", no_argument, 0, 'q' }, | |
162 | { "verbose", no_argument, 0, 'v' }, | |
163 | { "verbose-consumer", no_argument, 0, '\0' }, | |
164 | { "no-kernel", no_argument, 0, '\0' }, | |
165 | { "pidfile", required_argument, 0, 'p' }, | |
166 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
167 | { "config", required_argument, 0, 'f' }, | |
168 | { "load", required_argument, 0, 'l' }, | |
169 | { "kmod-probes", required_argument, 0, '\0' }, | |
170 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
171 | { NULL, 0, 0, 0 } |
172 | }; | |
173 | ||
e6142f2e JG |
174 | struct sessiond_config config; |
175 | ||
26296c48 JG |
176 | /* Command line options to ignore from configuration file */ |
177 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
178 | ||
26c9d55e | 179 | /* Shared between threads */ |
099e26bd | 180 | static int dispatch_thread_exit; |
fac6795d | 181 | |
1d4b027a | 182 | /* Sockets and FDs */ |
a4b35e07 MD |
183 | static int client_sock = -1; |
184 | static int apps_sock = -1; | |
2f77fc4b | 185 | int kernel_tracer_fd = -1; |
76d7553f | 186 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 187 | |
273ea72c DG |
188 | /* |
189 | * Quit pipe for all threads. This permits a single cancellation point | |
190 | * for all threads when receiving an event on the pipe. | |
191 | */ | |
76d7553f | 192 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 193 | |
099e26bd DG |
194 | /* |
195 | * This pipe is used to inform the thread managing application communication | |
196 | * that a command is queued and ready to be processed. | |
197 | */ | |
76d7553f | 198 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 199 | |
d0b96690 DG |
200 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
201 | ||
1d4b027a | 202 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 203 | static pthread_t apps_thread; |
d0b96690 | 204 | static pthread_t apps_notify_thread; |
099e26bd | 205 | static pthread_t reg_apps_thread; |
1d4b027a | 206 | static pthread_t client_thread; |
7a485870 | 207 | static pthread_t kernel_thread; |
099e26bd | 208 | static pthread_t dispatch_thread; |
44a5e5eb | 209 | static pthread_t health_thread; |
0b2dc8df | 210 | static pthread_t ht_cleanup_thread; |
022d91ba | 211 | static pthread_t agent_reg_thread; |
ef367a93 | 212 | static pthread_t load_session_thread; |
b3530820 | 213 | static pthread_t notification_thread; |
db66e574 | 214 | static pthread_t rotation_thread; |
d086f507 | 215 | static pthread_t timer_thread; |
5eb91c98 | 216 | |
099e26bd DG |
217 | /* |
218 | * UST registration command queue. This queue is tied with a futex and uses a N | |
219 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
220 | * | |
b22c5da8 DG |
221 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
222 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
223 | * the line new application socket and monitors it for any I/O error or clean | |
224 | * close that triggers an unregistration of the application. | |
099e26bd DG |
225 | */ |
226 | static struct ust_cmd_queue ust_cmd_queue; | |
227 | ||
b5541356 DG |
228 | /* |
229 | * Pointer initialized before thread creation. | |
230 | * | |
231 | * This points to the tracing session list containing the session count and a | |
232 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
233 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 234 | * |
d063d709 | 235 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 236 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
237 | */ |
238 | static struct ltt_session_list *session_list_ptr; | |
239 | ||
7753dea8 MD |
240 | int ust_consumerd64_fd = -1; |
241 | int ust_consumerd32_fd = -1; | |
242 | ||
2f77fc4b DG |
243 | static const char *module_proc_lttng = "/proc/lttng"; |
244 | ||
5c827ce0 DG |
245 | /* |
246 | * Consumer daemon state which is changed when spawning it, killing it or in | |
247 | * case of a fatal error. | |
248 | */ | |
249 | enum consumerd_state { | |
250 | CONSUMER_STARTED = 1, | |
251 | CONSUMER_STOPPED = 2, | |
252 | CONSUMER_ERROR = 3, | |
253 | }; | |
254 | ||
255 | /* | |
256 | * This consumer daemon state is used to validate if a client command will be | |
257 | * able to reach the consumer. If not, the client is informed. For instance, | |
258 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
259 | * error to the client. | |
260 | * | |
261 | * The following example shows a possible race condition of this scheme: | |
262 | * | |
263 | * consumer thread error happens | |
264 | * client cmd arrives | |
265 | * client cmd checks state -> still OK | |
266 | * consumer thread exit, sets error | |
267 | * client cmd try to talk to consumer | |
268 | * ... | |
269 | * | |
270 | * However, since the consumer is a different daemon, we have no way of making | |
271 | * sure the command will reach it safely even with this state flag. This is why | |
272 | * we consider that up to the state validation during command processing, the | |
273 | * command is safe. After that, we can not guarantee the correctness of the | |
274 | * client request vis-a-vis the consumer. | |
275 | */ | |
276 | static enum consumerd_state ust_consumerd_state; | |
277 | static enum consumerd_state kernel_consumerd_state; | |
278 | ||
12744796 DG |
279 | /* Set in main() with the current page size. */ |
280 | long page_size; | |
281 | ||
8782cc74 MD |
282 | /* Application health monitoring */ |
283 | struct health_app *health_sessiond; | |
284 | ||
f43f95a9 DG |
285 | /* Am I root or not. */ |
286 | int is_root; /* Set to 1 if the daemon is running as root */ | |
287 | ||
26296c48 JG |
288 | const char * const config_section_name = "sessiond"; |
289 | ||
ef367a93 JG |
290 | /* Load session thread information to operate. */ |
291 | struct load_session_thread_data *load_info; | |
292 | ||
b3530820 JG |
293 | /* Notification thread handle. */ |
294 | struct notification_thread_handle *notification_thread_handle; | |
295 | ||
db66e574 JD |
296 | /* Rotation thread handle. */ |
297 | struct rotation_thread_handle *rotation_thread_handle; | |
298 | ||
7c1d2758 JG |
299 | /* Global hash tables */ |
300 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
301 | ||
97bc1426 | 302 | /* |
9cc1ba3b JG |
303 | * The initialization of the session daemon is done in multiple phases. |
304 | * | |
305 | * While all threads are launched near-simultaneously, only some of them | |
306 | * are needed to ensure the session daemon can start to respond to client | |
b3530820 | 307 | * requests. |
9cc1ba3b JG |
308 | * |
309 | * There are two important guarantees that we wish to offer with respect | |
310 | * to the initialisation of the session daemon: | |
311 | * - When the daemonize/background launcher process exits, the sessiond | |
312 | * is fully able to respond to client requests, | |
313 | * - Auto-loaded sessions are visible to clients. | |
314 | * | |
315 | * In order to achieve this, a number of support threads have to be launched | |
316 | * to allow the "client" thread to function properly. Moreover, since the | |
317 | * "load session" thread needs the client thread, we must provide a way | |
318 | * for the "load session" thread to know that the "client" thread is up | |
319 | * and running. | |
320 | * | |
321 | * Hence, the support threads decrement the lttng_sessiond_ready counter | |
322 | * while the "client" threads waits for it to reach 0. Once the "client" thread | |
323 | * unblocks, it posts the message_thread_ready semaphore which allows the | |
324 | * "load session" thread to progress. | |
325 | * | |
326 | * This implies that the "load session" thread is the last to be initialized | |
327 | * and will explicitly call sessiond_signal_parents(), which signals the parents | |
328 | * that the session daemon is fully initialized. | |
329 | * | |
330 | * The four (4) support threads are: | |
331 | * - agent_thread | |
332 | * - notification_thread | |
333 | * - rotation_thread | |
334 | * - health_thread | |
97bc1426 | 335 | */ |
bc4b3ff1 JG |
336 | #define NR_LTTNG_SESSIOND_SUPPORT_THREADS 4 |
337 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_SUPPORT_THREADS; | |
97bc1426 | 338 | |
5e97de00 JG |
339 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
340 | { | |
341 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
342 | } | |
343 | ||
97bc1426 | 344 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 | 345 | LTTNG_HIDDEN |
9cc1ba3b | 346 | void sessiond_signal_parents(void) |
97bc1426 | 347 | { |
9cc1ba3b JG |
348 | /* |
349 | * Notify parent pid that we are ready to accept command | |
350 | * for client side. This ppid is the one from the | |
351 | * external process that spawned us. | |
352 | */ | |
353 | if (config.sig_parent) { | |
354 | kill(ppid, SIGUSR1); | |
355 | } | |
97bc1426 | 356 | |
9cc1ba3b JG |
357 | /* |
358 | * Notify the parent of the fork() process that we are | |
359 | * ready. | |
360 | */ | |
361 | if (config.daemonize || config.background) { | |
362 | kill(child_ppid, SIGUSR1); | |
97bc1426 MD |
363 | } |
364 | } | |
365 | ||
9cc1ba3b JG |
366 | LTTNG_HIDDEN |
367 | void sessiond_notify_ready(void) | |
368 | { | |
369 | /* | |
524423d6 JG |
370 | * This memory barrier is paired with the one performed by |
371 | * the client thread after it has seen that 'lttng_sessiond_ready' is 0. | |
372 | * | |
373 | * The purpose of these memory barriers is to ensure that all | |
374 | * initialization operations of the various threads that call this | |
375 | * function to signal that they are ready are commited/published | |
376 | * before the client thread can see the 'lttng_sessiond_ready' counter | |
377 | * reach 0. | |
378 | * | |
379 | * Note that this could be a 'write' memory barrier, but a full barrier | |
380 | * is used in case the code using this utility changes. The performance | |
381 | * implications of this choice are minimal since this is a slow path. | |
9cc1ba3b | 382 | */ |
524423d6 JG |
383 | cmm_smp_mb(); |
384 | uatomic_sub(<tng_sessiond_ready, 1); | |
9cc1ba3b JG |
385 | } |
386 | ||
4a15001e MD |
387 | static |
388 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
389 | int *a_pipe) | |
5eb91c98 DG |
390 | { |
391 | int ret; | |
392 | ||
d0b96690 | 393 | assert(events); |
5eb91c98 DG |
394 | |
395 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
396 | if (ret < 0) { | |
397 | goto error; | |
398 | } | |
399 | ||
400 | /* Add quit pipe */ | |
4a15001e | 401 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
402 | if (ret < 0) { |
403 | goto error; | |
404 | } | |
405 | ||
406 | return 0; | |
407 | ||
408 | error: | |
409 | return ret; | |
410 | } | |
411 | ||
4a15001e MD |
412 | /* |
413 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
414 | */ | |
415 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
416 | { | |
417 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
418 | } | |
419 | ||
273ea72c | 420 | /* |
5eb91c98 | 421 | * Init thread quit pipe. |
273ea72c DG |
422 | * |
423 | * Return -1 on error or 0 if all pipes are created. | |
424 | */ | |
4a15001e | 425 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 426 | { |
730389d9 | 427 | int ret, i; |
273ea72c | 428 | |
4a15001e | 429 | ret = pipe(a_pipe); |
273ea72c | 430 | if (ret < 0) { |
730389d9 | 431 | PERROR("thread quit pipe"); |
273ea72c DG |
432 | goto error; |
433 | } | |
434 | ||
730389d9 | 435 | for (i = 0; i < 2; i++) { |
4a15001e | 436 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
437 | if (ret < 0) { |
438 | PERROR("fcntl"); | |
439 | goto error; | |
440 | } | |
441 | } | |
442 | ||
273ea72c DG |
443 | error: |
444 | return ret; | |
445 | } | |
446 | ||
4a15001e MD |
447 | static int init_thread_quit_pipe(void) |
448 | { | |
449 | return __init_thread_quit_pipe(thread_quit_pipe); | |
450 | } | |
451 | ||
099e26bd DG |
452 | /* |
453 | * Stop all threads by closing the thread quit pipe. | |
454 | */ | |
cf3af59e MD |
455 | static void stop_threads(void) |
456 | { | |
5eb91c98 DG |
457 | int ret; |
458 | ||
cf3af59e MD |
459 | /* Stopping all threads */ |
460 | DBG("Terminating all threads"); | |
54d01ffb | 461 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
462 | if (ret < 0) { |
463 | ERR("write error on thread quit pipe"); | |
464 | } | |
465 | ||
099e26bd | 466 | /* Dispatch thread */ |
26c9d55e | 467 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 468 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
469 | } |
470 | ||
e975f9f8 DG |
471 | /* |
472 | * Close every consumer sockets. | |
473 | */ | |
474 | static void close_consumer_sockets(void) | |
475 | { | |
476 | int ret; | |
477 | ||
478 | if (kconsumer_data.err_sock >= 0) { | |
479 | ret = close(kconsumer_data.err_sock); | |
480 | if (ret < 0) { | |
481 | PERROR("kernel consumer err_sock close"); | |
482 | } | |
483 | } | |
484 | if (ustconsumer32_data.err_sock >= 0) { | |
485 | ret = close(ustconsumer32_data.err_sock); | |
486 | if (ret < 0) { | |
a76cbd9f | 487 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
488 | } |
489 | } | |
490 | if (ustconsumer64_data.err_sock >= 0) { | |
491 | ret = close(ustconsumer64_data.err_sock); | |
492 | if (ret < 0) { | |
a76cbd9f | 493 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
494 | } |
495 | } | |
496 | if (kconsumer_data.cmd_sock >= 0) { | |
497 | ret = close(kconsumer_data.cmd_sock); | |
498 | if (ret < 0) { | |
499 | PERROR("kernel consumer cmd_sock close"); | |
500 | } | |
501 | } | |
502 | if (ustconsumer32_data.cmd_sock >= 0) { | |
503 | ret = close(ustconsumer32_data.cmd_sock); | |
504 | if (ret < 0) { | |
a76cbd9f | 505 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
506 | } |
507 | } | |
508 | if (ustconsumer64_data.cmd_sock >= 0) { | |
509 | ret = close(ustconsumer64_data.cmd_sock); | |
510 | if (ret < 0) { | |
a76cbd9f | 511 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
512 | } |
513 | } | |
b3530820 JG |
514 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
515 | ret = close(kconsumer_data.channel_monitor_pipe); | |
516 | if (ret < 0) { | |
517 | PERROR("kernel consumer channel monitor pipe close"); | |
518 | } | |
519 | } | |
520 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
521 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
522 | if (ret < 0) { | |
523 | PERROR("UST consumerd32 channel monitor pipe close"); | |
524 | } | |
525 | } | |
526 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
527 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
528 | if (ret < 0) { | |
529 | PERROR("UST consumerd64 channel monitor pipe close"); | |
530 | } | |
531 | } | |
62c43103 JD |
532 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
533 | ret = close(kconsumer_data.channel_rotate_pipe); | |
534 | if (ret < 0) { | |
535 | PERROR("kernel consumer channel rotate pipe close"); | |
536 | } | |
537 | } | |
538 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
539 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
540 | if (ret < 0) { | |
541 | PERROR("UST consumerd32 channel rotate pipe close"); | |
542 | } | |
543 | } | |
544 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
545 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
546 | if (ret < 0) { | |
547 | PERROR("UST consumerd64 channel rotate pipe close"); | |
548 | } | |
549 | } | |
e975f9f8 DG |
550 | } |
551 | ||
4e4714cb JR |
552 | /* |
553 | * Wait on consumer process termination. | |
554 | * | |
555 | * Need to be called with the consumer data lock held or from a context | |
556 | * ensuring no concurrent access to data (e.g: cleanup). | |
557 | */ | |
558 | static void wait_consumer(struct consumer_data *consumer_data) | |
559 | { | |
560 | pid_t ret; | |
561 | int status; | |
562 | ||
563 | if (consumer_data->pid <= 0) { | |
564 | return; | |
565 | } | |
566 | ||
567 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
568 | consumer_data->pid); | |
569 | ret = waitpid(consumer_data->pid, &status, 0); | |
570 | if (ret == -1) { | |
571 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 572 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
573 | ERR("consumerd termination with error: %d", |
574 | WEXITSTATUS(ret)); | |
575 | } | |
576 | consumer_data->pid = 0; | |
577 | } | |
578 | ||
fac6795d | 579 | /* |
4a15001e | 580 | * Cleanup the session daemon's data structures. |
fac6795d | 581 | */ |
4a15001e | 582 | static void sessiond_cleanup(void) |
fac6795d | 583 | { |
ef599319 | 584 | int ret; |
af9737e9 | 585 | struct ltt_session *sess, *stmp; |
fac6795d | 586 | |
4a15001e | 587 | DBG("Cleanup sessiond"); |
e07ae692 | 588 | |
4e449f3f MD |
589 | /* |
590 | * Close the thread quit pipe. It has already done its job, | |
591 | * since we are now called. | |
592 | */ | |
2f77fc4b DG |
593 | utils_close_pipe(thread_quit_pipe); |
594 | ||
35f90c40 | 595 | /* |
e6142f2e JG |
596 | * If config.pid_file_path.value is undefined, the default file will be |
597 | * wiped when removing the rundir. | |
35f90c40 | 598 | */ |
e6142f2e JG |
599 | if (config.pid_file_path.value) { |
600 | ret = remove(config.pid_file_path.value); | |
35f90c40 | 601 | if (ret < 0) { |
e6142f2e | 602 | PERROR("remove pidfile %s", config.pid_file_path.value); |
35f90c40 DG |
603 | } |
604 | } | |
605 | ||
e6142f2e JG |
606 | DBG("Removing sessiond and consumerd content of directory %s", |
607 | config.rundir.value); | |
8c6c56c2 MD |
608 | |
609 | /* sessiond */ | |
e6142f2e JG |
610 | DBG("Removing %s", config.pid_file_path.value); |
611 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 612 | |
e6142f2e JG |
613 | DBG("Removing %s", config.agent_port_file_path.value); |
614 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 615 | |
8c6c56c2 | 616 | /* kconsumerd */ |
e6142f2e JG |
617 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
618 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
619 | ||
620 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
621 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
622 | |
623 | /* ust consumerd 32 */ | |
e6142f2e JG |
624 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
625 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
626 | ||
627 | DBG("Removing directory %s", config.consumerd32_path.value); | |
628 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
629 | |
630 | /* ust consumerd 64 */ | |
e6142f2e JG |
631 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
632 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
633 | ||
634 | DBG("Removing directory %s", config.consumerd64_path.value); | |
635 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 636 | |
99bab54f | 637 | DBG("Cleaning up all sessions"); |
fac6795d | 638 | |
b5541356 | 639 | /* Destroy session list mutex */ |
273ea72c DG |
640 | if (session_list_ptr != NULL) { |
641 | pthread_mutex_destroy(&session_list_ptr->lock); | |
642 | ||
643 | /* Cleanup ALL session */ | |
54d01ffb DG |
644 | cds_list_for_each_entry_safe(sess, stmp, |
645 | &session_list_ptr->head, list) { | |
90936dcf JD |
646 | cmd_destroy_session(sess, kernel_poll_pipe[1], |
647 | notification_thread_handle); | |
273ea72c DG |
648 | } |
649 | } | |
650 | ||
4e4714cb JR |
651 | wait_consumer(&kconsumer_data); |
652 | wait_consumer(&ustconsumer64_data); | |
653 | wait_consumer(&ustconsumer32_data); | |
654 | ||
6a4e4039 JG |
655 | DBG("Cleaning up all agent apps"); |
656 | agent_app_ht_clean(); | |
657 | ||
099e26bd | 658 | DBG("Closing all UST sockets"); |
56fff090 | 659 | ust_app_clean_list(); |
7972aab2 | 660 | buffer_reg_destroy_registries(); |
099e26bd | 661 | |
e6142f2e | 662 | if (is_root && !config.no_kernel) { |
4fba7219 | 663 | DBG2("Closing kernel fd"); |
a4b35e07 | 664 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
665 | ret = close(kernel_tracer_fd); |
666 | if (ret) { | |
667 | PERROR("close"); | |
668 | } | |
a4b35e07 | 669 | } |
2f50c8a3 | 670 | DBG("Unloading kernel modules"); |
096102bd | 671 | modprobe_remove_lttng_all(); |
834978fd | 672 | free(syscall_table); |
2f50c8a3 | 673 | } |
2f77fc4b | 674 | |
e975f9f8 DG |
675 | close_consumer_sockets(); |
676 | ||
ef367a93 JG |
677 | if (load_info) { |
678 | load_session_destroy_data(load_info); | |
679 | free(load_info); | |
680 | } | |
681 | ||
c9cb3e7d JG |
682 | /* |
683 | * We do NOT rmdir rundir because there are other processes | |
684 | * using it, for instance lttng-relayd, which can start in | |
685 | * parallel with this teardown. | |
686 | */ | |
4a15001e MD |
687 | } |
688 | ||
689 | /* | |
690 | * Cleanup the daemon's option data structures. | |
691 | */ | |
692 | static void sessiond_cleanup_options(void) | |
693 | { | |
694 | DBG("Cleaning up options"); | |
695 | ||
e6142f2e | 696 | sessiond_config_fini(&config); |
c9cb3e7d | 697 | |
7567352f | 698 | run_as_destroy_worker(); |
fac6795d DG |
699 | } |
700 | ||
e065084a | 701 | /* |
d063d709 | 702 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 703 | * |
d063d709 | 704 | * Return lttcomm error code. |
e065084a DG |
705 | */ |
706 | static int send_unix_sock(int sock, void *buf, size_t len) | |
707 | { | |
708 | /* Check valid length */ | |
c617c0c6 | 709 | if (len == 0) { |
e065084a DG |
710 | return -1; |
711 | } | |
712 | ||
713 | return lttcomm_send_unix_sock(sock, buf, len); | |
714 | } | |
715 | ||
5461b305 | 716 | /* |
d063d709 | 717 | * Free memory of a command context structure. |
5461b305 | 718 | */ |
a2fb29a5 | 719 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 720 | { |
a2fb29a5 DG |
721 | DBG("Clean command context structure"); |
722 | if (*cmd_ctx) { | |
723 | if ((*cmd_ctx)->llm) { | |
724 | free((*cmd_ctx)->llm); | |
5461b305 | 725 | } |
a2fb29a5 DG |
726 | if ((*cmd_ctx)->lsm) { |
727 | free((*cmd_ctx)->lsm); | |
5461b305 | 728 | } |
a2fb29a5 DG |
729 | free(*cmd_ctx); |
730 | *cmd_ctx = NULL; | |
5461b305 DG |
731 | } |
732 | } | |
733 | ||
fac6795d | 734 | /* |
0fdd1e2c | 735 | * Notify UST applications using the shm mmap futex. |
fac6795d | 736 | */ |
0fdd1e2c | 737 | static int notify_ust_apps(int active) |
fac6795d | 738 | { |
0fdd1e2c | 739 | char *wait_shm_mmap; |
fac6795d | 740 | |
0fdd1e2c | 741 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 742 | |
0fdd1e2c | 743 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 744 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 745 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
746 | goto error; |
747 | } | |
748 | ||
0fdd1e2c DG |
749 | /* Wake waiting process */ |
750 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
751 | ||
752 | /* Apps notified successfully */ | |
753 | return 0; | |
fac6795d DG |
754 | |
755 | error: | |
0fdd1e2c | 756 | return -1; |
fac6795d DG |
757 | } |
758 | ||
e065084a | 759 | /* |
d063d709 DG |
760 | * Setup the outgoing data buffer for the response (llm) by allocating the |
761 | * right amount of memory and copying the original information from the lsm | |
762 | * structure. | |
ca95a216 | 763 | * |
6e10c9b9 | 764 | * Return 0 on success, negative value on error. |
ca95a216 | 765 | */ |
6e10c9b9 PP |
766 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
767 | const void *payload_buf, size_t payload_len, | |
768 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 769 | { |
6e10c9b9 PP |
770 | int ret = 0; |
771 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
772 | const size_t cmd_header_offset = header_len; | |
773 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
774 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 775 | |
6e10c9b9 | 776 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 777 | |
5461b305 | 778 | if (cmd_ctx->llm == NULL) { |
76d7553f | 779 | PERROR("zmalloc"); |
5461b305 | 780 | ret = -ENOMEM; |
6e10c9b9 | 781 | goto end; |
ca95a216 DG |
782 | } |
783 | ||
5461b305 DG |
784 | /* Copy common data */ |
785 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 786 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
787 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
788 | cmd_ctx->llm->data_size = payload_len; | |
789 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 790 | |
6e10c9b9 | 791 | /* Copy command header */ |
b4e3ceb9 PP |
792 | if (cmd_header_len) { |
793 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
794 | cmd_header_len); | |
795 | } | |
5461b305 | 796 | |
6e10c9b9 | 797 | /* Copy payload */ |
b4e3ceb9 PP |
798 | if (payload_len) { |
799 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
800 | payload_len); | |
801 | } | |
ca95a216 | 802 | |
6e10c9b9 | 803 | end: |
ca95a216 DG |
804 | return ret; |
805 | } | |
806 | ||
6e10c9b9 PP |
807 | /* |
808 | * Version of setup_lttng_msg() without command header. | |
809 | */ | |
810 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
811 | void *payload_buf, size_t payload_len) | |
812 | { | |
813 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
814 | } | |
7a485870 | 815 | /* |
5eb91c98 | 816 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 817 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 818 | */ |
5eb91c98 | 819 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 820 | { |
5eb91c98 | 821 | int ret; |
7a485870 DG |
822 | struct ltt_session *session; |
823 | struct ltt_kernel_channel *channel; | |
824 | ||
5eb91c98 | 825 | DBG("Updating kernel poll set"); |
7a485870 | 826 | |
54d01ffb | 827 | session_lock_list(); |
b5541356 | 828 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 829 | session_lock(session); |
7a485870 | 830 | if (session->kernel_session == NULL) { |
54d01ffb | 831 | session_unlock(session); |
7a485870 DG |
832 | continue; |
833 | } | |
7a485870 | 834 | |
54d01ffb DG |
835 | cds_list_for_each_entry(channel, |
836 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
837 | /* Add channel fd to the kernel poll set */ |
838 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
839 | if (ret < 0) { | |
54d01ffb | 840 | session_unlock(session); |
5eb91c98 DG |
841 | goto error; |
842 | } | |
843 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 844 | } |
54d01ffb | 845 | session_unlock(session); |
7a485870 | 846 | } |
54d01ffb | 847 | session_unlock_list(); |
7a485870 | 848 | |
5eb91c98 | 849 | return 0; |
7a485870 DG |
850 | |
851 | error: | |
54d01ffb | 852 | session_unlock_list(); |
7a485870 DG |
853 | return -1; |
854 | } | |
855 | ||
856 | /* | |
54d01ffb | 857 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 858 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 859 | * |
d063d709 | 860 | * Useful for CPU hotplug feature. |
7a485870 | 861 | */ |
7f032058 | 862 | static int update_kernel_stream(int fd) |
7a485870 DG |
863 | { |
864 | int ret = 0; | |
865 | struct ltt_session *session; | |
173af62f | 866 | struct ltt_kernel_session *ksess; |
7a485870 DG |
867 | struct ltt_kernel_channel *channel; |
868 | ||
869 | DBG("Updating kernel streams for channel fd %d", fd); | |
870 | ||
54d01ffb | 871 | session_lock_list(); |
b5541356 | 872 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 873 | session_lock(session); |
7a485870 | 874 | if (session->kernel_session == NULL) { |
54d01ffb | 875 | session_unlock(session); |
7a485870 DG |
876 | continue; |
877 | } | |
173af62f | 878 | ksess = session->kernel_session; |
d9800920 | 879 | |
4a15001e MD |
880 | cds_list_for_each_entry(channel, |
881 | &ksess->channel_list.head, list) { | |
882 | struct lttng_ht_iter iter; | |
883 | struct consumer_socket *socket; | |
d9800920 | 884 | |
4a15001e MD |
885 | if (channel->fd != fd) { |
886 | continue; | |
887 | } | |
888 | DBG("Channel found, updating kernel streams"); | |
889 | ret = kernel_open_channel_stream(channel); | |
890 | if (ret < 0) { | |
891 | goto error; | |
892 | } | |
893 | /* Update the stream global counter */ | |
894 | ksess->stream_count_global += ret; | |
895 | ||
896 | /* | |
897 | * Have we already sent fds to the consumer? If yes, it | |
898 | * means that tracing is started so it is safe to send | |
899 | * our updated stream fds. | |
900 | */ | |
901 | if (ksess->consumer_fds_sent != 1 | |
902 | || ksess->consumer == NULL) { | |
903 | ret = -1; | |
904 | goto error; | |
905 | } | |
906 | ||
907 | rcu_read_lock(); | |
908 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
909 | &iter.iter, socket, node.node) { | |
910 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 911 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
912 | channel, ksess, |
913 | session->output_traces ? 1 : 0); | |
914 | pthread_mutex_unlock(socket->lock); | |
915 | if (ret < 0) { | |
e7fe706f | 916 | rcu_read_unlock(); |
4a15001e | 917 | goto error; |
7a485870 | 918 | } |
7a485870 | 919 | } |
4a15001e | 920 | rcu_read_unlock(); |
7a485870 | 921 | } |
54d01ffb | 922 | session_unlock(session); |
7a485870 | 923 | } |
54d01ffb | 924 | session_unlock_list(); |
b3c750d2 | 925 | return ret; |
7a485870 | 926 | |
b3c750d2 | 927 | error: |
54d01ffb DG |
928 | session_unlock(session); |
929 | session_unlock_list(); | |
7a485870 DG |
930 | return ret; |
931 | } | |
932 | ||
487cf67c | 933 | /* |
ffe60014 DG |
934 | * For each tracing session, update newly registered apps. The session list |
935 | * lock MUST be acquired before calling this. | |
487cf67c DG |
936 | */ |
937 | static void update_ust_app(int app_sock) | |
938 | { | |
939 | struct ltt_session *sess, *stmp; | |
940 | ||
fdadac08 DG |
941 | /* Consumer is in an ERROR state. Stop any application update. */ |
942 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
943 | /* Stop the update process since the consumer is dead. */ | |
944 | return; | |
945 | } | |
946 | ||
487cf67c DG |
947 | /* For all tracing session(s) */ |
948 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
949 | struct ust_app *app; |
950 | ||
4ee14516 | 951 | session_lock(sess); |
a9ad0c8f MD |
952 | if (!sess->ust_session) { |
953 | goto unlock_session; | |
954 | } | |
955 | ||
956 | rcu_read_lock(); | |
957 | assert(app_sock >= 0); | |
958 | app = ust_app_find_by_sock(app_sock); | |
959 | if (app == NULL) { | |
960 | /* | |
961 | * Application can be unregistered before so | |
962 | * this is possible hence simply stopping the | |
963 | * update. | |
964 | */ | |
965 | DBG3("UST app update failed to find app sock %d", | |
966 | app_sock); | |
967 | goto unlock_rcu; | |
421cb601 | 968 | } |
a9ad0c8f MD |
969 | ust_app_global_update(sess->ust_session, app); |
970 | unlock_rcu: | |
971 | rcu_read_unlock(); | |
972 | unlock_session: | |
4ee14516 | 973 | session_unlock(sess); |
487cf67c DG |
974 | } |
975 | } | |
976 | ||
7a485870 | 977 | /* |
d063d709 | 978 | * This thread manage event coming from the kernel. |
7a485870 | 979 | * |
d063d709 DG |
980 | * Features supported in this thread: |
981 | * -) CPU Hotplug | |
7a485870 DG |
982 | */ |
983 | static void *thread_manage_kernel(void *data) | |
984 | { | |
139ac872 | 985 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 986 | uint32_t revents, nb_fd; |
7a485870 | 987 | char tmp; |
5eb91c98 | 988 | struct lttng_poll_event events; |
7a485870 | 989 | |
6993eeb3 | 990 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 991 | |
6c71277b | 992 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 993 | |
d5d63bf1 DG |
994 | /* |
995 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 996 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 997 | */ |
6d737ce4 | 998 | lttng_poll_init(&events); |
d5d63bf1 | 999 | |
e547b070 | 1000 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
1001 | goto error_testpoint; |
1002 | } | |
8ac94142 | 1003 | |
840cb59c | 1004 | health_code_update(); |
44a5e5eb | 1005 | |
e547b070 | 1006 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 1007 | goto error_testpoint; |
6993eeb3 CB |
1008 | } |
1009 | ||
7a485870 | 1010 | while (1) { |
840cb59c | 1011 | health_code_update(); |
44a5e5eb | 1012 | |
7a485870 | 1013 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1014 | /* Clean events object. We are about to populate it again. */ |
1015 | lttng_poll_clean(&events); | |
1016 | ||
d0b96690 | 1017 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1018 | if (ret < 0) { |
1019 | goto error_poll_create; | |
1020 | } | |
1021 | ||
1022 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1023 | if (ret < 0) { | |
1024 | goto error; | |
1025 | } | |
5f822d0a | 1026 | |
d21b0d71 | 1027 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1028 | ret = update_kernel_poll(&events); |
1029 | if (ret < 0) { | |
7a485870 DG |
1030 | goto error; |
1031 | } | |
1032 | update_poll_flag = 0; | |
1033 | } | |
1034 | ||
7fa2082e | 1035 | DBG("Thread kernel polling"); |
7a485870 DG |
1036 | |
1037 | /* Poll infinite value of time */ | |
88f2b785 | 1038 | restart: |
a78af745 | 1039 | health_poll_entry(); |
5eb91c98 | 1040 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1041 | DBG("Thread kernel return from poll on %d fds", |
1042 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1043 | health_poll_exit(); |
7a485870 | 1044 | if (ret < 0) { |
88f2b785 MD |
1045 | /* |
1046 | * Restart interrupted system call. | |
1047 | */ | |
1048 | if (errno == EINTR) { | |
1049 | goto restart; | |
1050 | } | |
7a485870 DG |
1051 | goto error; |
1052 | } else if (ret == 0) { | |
1053 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1054 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1055 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1056 | continue; |
1057 | } | |
1058 | ||
0d9c5d77 DG |
1059 | nb_fd = ret; |
1060 | ||
5eb91c98 DG |
1061 | for (i = 0; i < nb_fd; i++) { |
1062 | /* Fetch once the poll data */ | |
1063 | revents = LTTNG_POLL_GETEV(&events, i); | |
1064 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1065 | |
840cb59c | 1066 | health_code_update(); |
44a5e5eb | 1067 | |
fd20dac9 MD |
1068 | if (!revents) { |
1069 | /* No activity for this FD (poll implementation). */ | |
1070 | continue; | |
1071 | } | |
1072 | ||
5eb91c98 | 1073 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1074 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1075 | if (ret) { |
139ac872 MD |
1076 | err = 0; |
1077 | goto exit; | |
5eb91c98 | 1078 | } |
7a485870 | 1079 | |
5eb91c98 | 1080 | /* Check for data on kernel pipe */ |
03e43155 MD |
1081 | if (revents & LPOLLIN) { |
1082 | if (pollfd == kernel_poll_pipe[0]) { | |
1083 | (void) lttng_read(kernel_poll_pipe[0], | |
1084 | &tmp, 1); | |
1085 | /* | |
1086 | * Ret value is useless here, if this pipe gets any actions an | |
1087 | * update is required anyway. | |
1088 | */ | |
1089 | update_poll_flag = 1; | |
1090 | continue; | |
1091 | } else { | |
1092 | /* | |
1093 | * New CPU detected by the kernel. Adding kernel stream to | |
1094 | * kernel session and updating the kernel consumer | |
1095 | */ | |
7f032058 | 1096 | ret = update_kernel_stream(pollfd); |
5eb91c98 DG |
1097 | if (ret < 0) { |
1098 | continue; | |
1099 | } | |
1100 | break; | |
7a485870 | 1101 | } |
03e43155 MD |
1102 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1103 | update_poll_flag = 1; | |
1104 | continue; | |
1105 | } else { | |
1106 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1107 | goto error; | |
7a485870 DG |
1108 | } |
1109 | } | |
1110 | } | |
1111 | ||
139ac872 | 1112 | exit: |
7a485870 | 1113 | error: |
5eb91c98 | 1114 | lttng_poll_clean(&events); |
76d7553f | 1115 | error_poll_create: |
6993eeb3 | 1116 | error_testpoint: |
6620da75 DG |
1117 | utils_close_pipe(kernel_poll_pipe); |
1118 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1119 | if (err) { |
840cb59c | 1120 | health_error(); |
139ac872 | 1121 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1122 | WARN("Kernel thread died unexpectedly. " |
1123 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1124 | } |
8782cc74 | 1125 | health_unregister(health_sessiond); |
76d7553f | 1126 | DBG("Kernel thread dying"); |
7a485870 DG |
1127 | return NULL; |
1128 | } | |
1129 | ||
a23ec3a7 DG |
1130 | /* |
1131 | * Signal pthread condition of the consumer data that the thread. | |
1132 | */ | |
1133 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1134 | { | |
1135 | pthread_mutex_lock(&data->cond_mutex); | |
1136 | ||
1137 | /* | |
1138 | * The state is set before signaling. It can be any value, it's the waiter | |
1139 | * job to correctly interpret this condition variable associated to the | |
1140 | * consumer pthread_cond. | |
1141 | * | |
1142 | * A value of 0 means that the corresponding thread of the consumer data | |
1143 | * was not started. 1 indicates that the thread has started and is ready | |
1144 | * for action. A negative value means that there was an error during the | |
1145 | * thread bootstrap. | |
1146 | */ | |
1147 | data->consumer_thread_is_ready = state; | |
1148 | (void) pthread_cond_signal(&data->cond); | |
1149 | ||
1150 | pthread_mutex_unlock(&data->cond_mutex); | |
1151 | } | |
1152 | ||
1d4b027a | 1153 | /* |
3bd1e081 | 1154 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1155 | */ |
3bd1e081 | 1156 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1157 | { |
42fc1d0b | 1158 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1159 | uint32_t revents, nb_fd; |
1d4b027a | 1160 | enum lttcomm_return_code code; |
5eb91c98 | 1161 | struct lttng_poll_event events; |
3bd1e081 | 1162 | struct consumer_data *consumer_data = data; |
b3530820 | 1163 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1164 | |
3bd1e081 | 1165 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1166 | |
34c1e15a MD |
1167 | rcu_register_thread(); |
1168 | rcu_thread_online(); | |
1169 | ||
6c71277b | 1170 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1171 | |
855060f8 | 1172 | health_code_update(); |
9449cc75 | 1173 | |
5eb91c98 | 1174 | /* |
331744e3 JD |
1175 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1176 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1177 | */ |
331744e3 | 1178 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1179 | if (ret < 0) { |
76d7553f | 1180 | goto error_poll; |
5eb91c98 | 1181 | } |
273ea72c | 1182 | |
edb8b045 DG |
1183 | /* |
1184 | * The error socket here is already in a listening state which was done | |
1185 | * just before spawning this thread to avoid a race between the consumer | |
1186 | * daemon exec trying to connect and the listen() call. | |
1187 | */ | |
3bd1e081 | 1188 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1189 | if (ret < 0) { |
1190 | goto error; | |
1191 | } | |
1192 | ||
840cb59c | 1193 | health_code_update(); |
44a5e5eb | 1194 | |
331744e3 | 1195 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1196 | restart: |
a78af745 | 1197 | health_poll_entry(); |
8ac94142 | 1198 | |
e547b070 | 1199 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1200 | goto error; |
1201 | } | |
8ac94142 | 1202 | |
5eb91c98 | 1203 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1204 | health_poll_exit(); |
273ea72c | 1205 | if (ret < 0) { |
88f2b785 MD |
1206 | /* |
1207 | * Restart interrupted system call. | |
1208 | */ | |
1209 | if (errno == EINTR) { | |
1210 | goto restart; | |
1211 | } | |
273ea72c DG |
1212 | goto error; |
1213 | } | |
1214 | ||
0d9c5d77 DG |
1215 | nb_fd = ret; |
1216 | ||
5eb91c98 DG |
1217 | for (i = 0; i < nb_fd; i++) { |
1218 | /* Fetch once the poll data */ | |
1219 | revents = LTTNG_POLL_GETEV(&events, i); | |
1220 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1221 | ||
840cb59c | 1222 | health_code_update(); |
44a5e5eb | 1223 | |
fd20dac9 MD |
1224 | if (!revents) { |
1225 | /* No activity for this FD (poll implementation). */ | |
1226 | continue; | |
1227 | } | |
1228 | ||
5eb91c98 | 1229 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1230 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1231 | if (ret) { |
139ac872 MD |
1232 | err = 0; |
1233 | goto exit; | |
5eb91c98 DG |
1234 | } |
1235 | ||
1236 | /* Event on the registration socket */ | |
3bd1e081 | 1237 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1238 | if (revents & LPOLLIN) { |
1239 | continue; | |
1240 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1241 | ERR("consumer err socket poll error"); |
5eb91c98 | 1242 | goto error; |
03e43155 MD |
1243 | } else { |
1244 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1245 | goto error; | |
5eb91c98 DG |
1246 | } |
1247 | } | |
273ea72c DG |
1248 | } |
1249 | ||
3bd1e081 | 1250 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1251 | if (sock < 0) { |
1252 | goto error; | |
1253 | } | |
1254 | ||
b662582b DG |
1255 | /* |
1256 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1257 | * show must go on. | |
1258 | */ | |
1259 | (void) utils_set_fd_cloexec(sock); | |
1260 | ||
840cb59c | 1261 | health_code_update(); |
44a5e5eb | 1262 | |
3bd1e081 | 1263 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1264 | |
712ea556 | 1265 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1266 | ret = lttcomm_recv_unix_sock(sock, &code, |
1267 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1268 | if (ret <= 0) { |
1269 | goto error; | |
1270 | } | |
1271 | ||
840cb59c | 1272 | health_code_update(); |
b3530820 | 1273 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1274 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1275 | lttcomm_get_readable_code(-code)); |
1276 | goto error; | |
1277 | } | |
1278 | ||
b3530820 JG |
1279 | /* Connect both command and metadata sockets. */ |
1280 | consumer_data->cmd_sock = | |
1281 | lttcomm_connect_unix_sock( | |
1282 | consumer_data->cmd_unix_sock_path); | |
1283 | consumer_data->metadata_fd = | |
1284 | lttcomm_connect_unix_sock( | |
1285 | consumer_data->cmd_unix_sock_path); | |
1286 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1287 | PERROR("consumer connect cmd socket"); | |
1288 | /* On error, signal condition and quit. */ | |
1289 | signal_consumer_condition(consumer_data, -1); | |
1290 | goto error; | |
1291 | } | |
1292 | ||
1293 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1294 | ||
1295 | /* Create metadata socket lock. */ | |
1296 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1297 | if (consumer_data->metadata_sock.lock == NULL) { | |
1298 | PERROR("zmalloc pthread mutex"); | |
1299 | goto error; | |
1300 | } | |
1301 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1302 | ||
1303 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1304 | DBG("Consumer metadata socket ready (fd: %d)", | |
1305 | consumer_data->metadata_fd); | |
1306 | ||
1307 | /* | |
1308 | * Remove the consumerd error sock since we've established a connection. | |
1309 | */ | |
3bd1e081 | 1310 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1311 | if (ret < 0) { |
72079cae DG |
1312 | goto error; |
1313 | } | |
1314 | ||
331744e3 | 1315 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1316 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1317 | if (ret < 0) { | |
72079cae | 1318 | goto error; |
5eb91c98 DG |
1319 | } |
1320 | ||
331744e3 | 1321 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1322 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1323 | LPOLLIN | LPOLLRDHUP); |
1324 | if (ret < 0) { | |
1325 | goto error; | |
1326 | } | |
1327 | ||
840cb59c | 1328 | health_code_update(); |
44a5e5eb | 1329 | |
b3530820 | 1330 | /* |
62c43103 JD |
1331 | * Transfer the write-end of the channel monitoring and rotate pipe |
1332 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1333 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1334 | */ |
1335 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1336 | if (!cmd_socket_wrapper) { | |
1337 | goto error; | |
1338 | } | |
3e4dc117 | 1339 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1340 | |
1341 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1342 | consumer_data->channel_monitor_pipe); | |
1343 | if (ret) { | |
1344 | goto error; | |
1345 | } | |
62c43103 JD |
1346 | |
1347 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1348 | consumer_data->channel_rotate_pipe); | |
1349 | if (ret) { | |
1350 | goto error; | |
1351 | } | |
1352 | ||
b3530820 JG |
1353 | /* Discard the socket wrapper as it is no longer needed. */ |
1354 | consumer_destroy_socket(cmd_socket_wrapper); | |
1355 | cmd_socket_wrapper = NULL; | |
1356 | ||
1357 | /* The thread is completely initialized, signal that it is ready. */ | |
1358 | signal_consumer_condition(consumer_data, 1); | |
1359 | ||
331744e3 | 1360 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1361 | restart_poll: |
331744e3 | 1362 | while (1) { |
42fc1d0b DG |
1363 | health_code_update(); |
1364 | ||
1365 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1366 | if (should_quit) { | |
1367 | /* Not a health error. */ | |
1368 | err = 0; | |
1369 | goto exit; | |
1370 | } | |
1371 | ||
331744e3 JD |
1372 | health_poll_entry(); |
1373 | ret = lttng_poll_wait(&events, -1); | |
1374 | health_poll_exit(); | |
1375 | if (ret < 0) { | |
1376 | /* | |
1377 | * Restart interrupted system call. | |
1378 | */ | |
1379 | if (errno == EINTR) { | |
1380 | goto restart_poll; | |
1381 | } | |
1382 | goto error; | |
88f2b785 | 1383 | } |
72079cae | 1384 | |
331744e3 | 1385 | nb_fd = ret; |
0d9c5d77 | 1386 | |
331744e3 JD |
1387 | for (i = 0; i < nb_fd; i++) { |
1388 | /* Fetch once the poll data */ | |
1389 | revents = LTTNG_POLL_GETEV(&events, i); | |
1390 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1391 | |
331744e3 | 1392 | health_code_update(); |
44a5e5eb | 1393 | |
fd20dac9 MD |
1394 | if (!revents) { |
1395 | /* No activity for this FD (poll implementation). */ | |
1396 | continue; | |
1397 | } | |
1398 | ||
42fc1d0b DG |
1399 | /* |
1400 | * Thread quit pipe has been triggered, flag that we should stop | |
1401 | * but continue the current loop to handle potential data from | |
1402 | * consumer. | |
1403 | */ | |
1404 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1405 | |
331744e3 JD |
1406 | if (pollfd == sock) { |
1407 | /* Event on the consumerd socket */ | |
03e43155 MD |
1408 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1409 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1410 | ERR("consumer err socket second poll error"); |
1411 | goto error; | |
1412 | } | |
1413 | health_code_update(); | |
1414 | /* Wait for any kconsumerd error */ | |
1415 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1416 | sizeof(enum lttcomm_return_code)); | |
1417 | if (ret <= 0) { | |
1418 | ERR("consumer closed the command socket"); | |
1419 | goto error; | |
1420 | } | |
1421 | ||
1422 | ERR("consumer return code : %s", | |
1423 | lttcomm_get_readable_code(-code)); | |
1424 | ||
1425 | goto exit; | |
4ce514c4 | 1426 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1427 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1428 | && !(revents & LPOLLIN)) { | |
1429 | ERR("consumer err metadata socket second poll error"); | |
1430 | goto error; | |
1431 | } | |
331744e3 JD |
1432 | /* UST metadata requests */ |
1433 | ret = ust_consumer_metadata_request( | |
1434 | &consumer_data->metadata_sock); | |
1435 | if (ret < 0) { | |
1436 | ERR("Handling metadata request"); | |
1437 | goto error; | |
1438 | } | |
5eb91c98 | 1439 | } |
42fc1d0b | 1440 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1441 | } |
331744e3 | 1442 | health_code_update(); |
5eb91c98 DG |
1443 | } |
1444 | ||
139ac872 | 1445 | exit: |
1d4b027a | 1446 | error: |
fdadac08 DG |
1447 | /* |
1448 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1449 | * thread might be using them so get exclusive access which will abort all |
1450 | * other consumer command by other threads. | |
fdadac08 DG |
1451 | */ |
1452 | pthread_mutex_lock(&consumer_data->lock); | |
1453 | ||
5c827ce0 DG |
1454 | /* Immediately set the consumerd state to stopped */ |
1455 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1456 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1457 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1458 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1459 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1460 | } else { | |
1461 | /* Code flow error... */ | |
1462 | assert(0); | |
1463 | } | |
1464 | ||
76d7553f MD |
1465 | if (consumer_data->err_sock >= 0) { |
1466 | ret = close(consumer_data->err_sock); | |
1467 | if (ret) { | |
1468 | PERROR("close"); | |
1469 | } | |
a76cbd9f | 1470 | consumer_data->err_sock = -1; |
76d7553f MD |
1471 | } |
1472 | if (consumer_data->cmd_sock >= 0) { | |
1473 | ret = close(consumer_data->cmd_sock); | |
1474 | if (ret) { | |
1475 | PERROR("close"); | |
1476 | } | |
a76cbd9f | 1477 | consumer_data->cmd_sock = -1; |
76d7553f | 1478 | } |
96544455 SS |
1479 | if (consumer_data->metadata_sock.fd_ptr && |
1480 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1481 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1482 | if (ret) { |
1483 | PERROR("close"); | |
1484 | } | |
1485 | } | |
76d7553f MD |
1486 | if (sock >= 0) { |
1487 | ret = close(sock); | |
1488 | if (ret) { | |
1489 | PERROR("close"); | |
1490 | } | |
1491 | } | |
273ea72c | 1492 | |
3bd1e081 MD |
1493 | unlink(consumer_data->err_unix_sock_path); |
1494 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1495 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1496 | |
fdadac08 | 1497 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1498 | if (consumer_data->metadata_sock.lock) { |
1499 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1500 | free(consumer_data->metadata_sock.lock); | |
1501 | } | |
5eb91c98 | 1502 | lttng_poll_clean(&events); |
b3530820 JG |
1503 | |
1504 | if (cmd_socket_wrapper) { | |
1505 | consumer_destroy_socket(cmd_socket_wrapper); | |
1506 | } | |
76d7553f | 1507 | error_poll: |
139ac872 | 1508 | if (err) { |
840cb59c | 1509 | health_error(); |
139ac872 MD |
1510 | ERR("Health error occurred in %s", __func__); |
1511 | } | |
8782cc74 | 1512 | health_unregister(health_sessiond); |
76d7553f | 1513 | DBG("consumer thread cleanup completed"); |
0177d773 | 1514 | |
34c1e15a MD |
1515 | rcu_thread_offline(); |
1516 | rcu_unregister_thread(); | |
1517 | ||
5eb91c98 | 1518 | return NULL; |
099e26bd DG |
1519 | } |
1520 | ||
099e26bd | 1521 | /* |
81f04d5f JG |
1522 | * This thread receives application command sockets (FDs) on the |
1523 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1524 | * or an error occurs. | |
1525 | * | |
1526 | * At that point, it flushes the data (tracing and metadata) associated | |
1527 | * with this application and tears down ust app sessions and other | |
1528 | * associated data structures through ust_app_unregister(). | |
1529 | * | |
1530 | * Note that this thread never sends commands to the applications | |
1531 | * through the command sockets; it merely listens for hang-ups | |
1532 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1533 | */ |
1534 | static void *thread_manage_apps(void *data) | |
099e26bd | 1535 | { |
139ac872 | 1536 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1537 | ssize_t size_ret; |
5eb91c98 | 1538 | uint32_t revents, nb_fd; |
5eb91c98 | 1539 | struct lttng_poll_event events; |
099e26bd DG |
1540 | |
1541 | DBG("[thread] Manage application started"); | |
1542 | ||
f6a9efaa DG |
1543 | rcu_register_thread(); |
1544 | rcu_thread_online(); | |
1545 | ||
6c71277b | 1546 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1547 | |
e547b070 | 1548 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1549 | goto error_testpoint; |
1550 | } | |
1551 | ||
840cb59c | 1552 | health_code_update(); |
44a5e5eb | 1553 | |
d0b96690 | 1554 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1555 | if (ret < 0) { |
76d7553f | 1556 | goto error_poll_create; |
5eb91c98 | 1557 | } |
099e26bd | 1558 | |
5eb91c98 DG |
1559 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1560 | if (ret < 0) { | |
1561 | goto error; | |
1562 | } | |
099e26bd | 1563 | |
e547b070 | 1564 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1565 | goto error; |
1566 | } | |
8ac94142 | 1567 | |
840cb59c | 1568 | health_code_update(); |
44a5e5eb | 1569 | |
5eb91c98 | 1570 | while (1) { |
7fa2082e | 1571 | DBG("Apps thread polling"); |
099e26bd DG |
1572 | |
1573 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1574 | restart: |
a78af745 | 1575 | health_poll_entry(); |
5eb91c98 | 1576 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1577 | DBG("Apps thread return from poll on %d fds", |
1578 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1579 | health_poll_exit(); |
099e26bd | 1580 | if (ret < 0) { |
88f2b785 MD |
1581 | /* |
1582 | * Restart interrupted system call. | |
1583 | */ | |
1584 | if (errno == EINTR) { | |
1585 | goto restart; | |
1586 | } | |
099e26bd DG |
1587 | goto error; |
1588 | } | |
1589 | ||
0d9c5d77 DG |
1590 | nb_fd = ret; |
1591 | ||
5eb91c98 DG |
1592 | for (i = 0; i < nb_fd; i++) { |
1593 | /* Fetch once the poll data */ | |
1594 | revents = LTTNG_POLL_GETEV(&events, i); | |
1595 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1596 | ||
840cb59c | 1597 | health_code_update(); |
44a5e5eb | 1598 | |
fd20dac9 MD |
1599 | if (!revents) { |
1600 | /* No activity for this FD (poll implementation). */ | |
1601 | continue; | |
1602 | } | |
1603 | ||
5eb91c98 | 1604 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1605 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1606 | if (ret) { |
139ac872 MD |
1607 | err = 0; |
1608 | goto exit; | |
5eb91c98 | 1609 | } |
099e26bd | 1610 | |
5eb91c98 DG |
1611 | /* Inspect the apps cmd pipe */ |
1612 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1613 | if (revents & LPOLLIN) { |
d0b96690 DG |
1614 | int sock; |
1615 | ||
5eb91c98 | 1616 | /* Empty pipe */ |
6cd525e8 MD |
1617 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1618 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1619 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1620 | goto error; |
1621 | } | |
099e26bd | 1622 | |
840cb59c | 1623 | health_code_update(); |
44a5e5eb | 1624 | |
ffe60014 | 1625 | /* |
03e43155 MD |
1626 | * Since this is a command socket (write then read), |
1627 | * we only monitor the error events of the socket. | |
ffe60014 | 1628 | */ |
d0b96690 DG |
1629 | ret = lttng_poll_add(&events, sock, |
1630 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1631 | if (ret < 0) { | |
5eb91c98 | 1632 | goto error; |
e0c7ec2b | 1633 | } |
acc7b41b | 1634 | |
d0b96690 | 1635 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1636 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1637 | ERR("Apps command pipe error"); | |
1638 | goto error; | |
1639 | } else { | |
1640 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1641 | goto error; | |
0177d773 | 1642 | } |
5eb91c98 DG |
1643 | } else { |
1644 | /* | |
54d01ffb DG |
1645 | * At this point, we know that a registered application made |
1646 | * the event at poll_wait. | |
5eb91c98 DG |
1647 | */ |
1648 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1649 | /* Removing from the poll set */ | |
1650 | ret = lttng_poll_del(&events, pollfd); | |
1651 | if (ret < 0) { | |
1652 | goto error; | |
1653 | } | |
099e26bd | 1654 | |
b9d9b220 | 1655 | /* Socket closed on remote end. */ |
56fff090 | 1656 | ust_app_unregister(pollfd); |
03e43155 MD |
1657 | } else { |
1658 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1659 | goto error; | |
5eb91c98 | 1660 | } |
099e26bd | 1661 | } |
44a5e5eb | 1662 | |
840cb59c | 1663 | health_code_update(); |
099e26bd | 1664 | } |
099e26bd DG |
1665 | } |
1666 | ||
139ac872 | 1667 | exit: |
099e26bd | 1668 | error: |
5eb91c98 | 1669 | lttng_poll_clean(&events); |
76d7553f | 1670 | error_poll_create: |
6993eeb3 | 1671 | error_testpoint: |
6620da75 DG |
1672 | utils_close_pipe(apps_cmd_pipe); |
1673 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1674 | ||
1675 | /* | |
1676 | * We don't clean the UST app hash table here since already registered | |
1677 | * applications can still be controlled so let them be until the session | |
1678 | * daemon dies or the applications stop. | |
1679 | */ | |
1680 | ||
139ac872 | 1681 | if (err) { |
840cb59c | 1682 | health_error(); |
139ac872 MD |
1683 | ERR("Health error occurred in %s", __func__); |
1684 | } | |
8782cc74 | 1685 | health_unregister(health_sessiond); |
76d7553f | 1686 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1687 | rcu_thread_offline(); |
1688 | rcu_unregister_thread(); | |
099e26bd DG |
1689 | return NULL; |
1690 | } | |
1691 | ||
d0b96690 | 1692 | /* |
d88aee68 DG |
1693 | * Send a socket to a thread This is called from the dispatch UST registration |
1694 | * thread once all sockets are set for the application. | |
d0b96690 | 1695 | * |
b85dc84c DG |
1696 | * The sock value can be invalid, we don't really care, the thread will handle |
1697 | * it and make the necessary cleanup if so. | |
1698 | * | |
d0b96690 DG |
1699 | * On success, return 0 else a negative value being the errno message of the |
1700 | * write(). | |
1701 | */ | |
d88aee68 | 1702 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1703 | { |
6cd525e8 | 1704 | ssize_t ret; |
d0b96690 | 1705 | |
b85dc84c DG |
1706 | /* |
1707 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1708 | * before calling this function being a shutdown state of the thread. | |
1709 | */ | |
1710 | if (fd < 0) { | |
1711 | ret = -EBADF; | |
1712 | goto error; | |
1713 | } | |
d0b96690 | 1714 | |
6cd525e8 MD |
1715 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1716 | if (ret < sizeof(sock)) { | |
d88aee68 | 1717 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1718 | if (ret < 0) { |
1719 | ret = -errno; | |
1720 | } | |
1721 | goto error; | |
1722 | } | |
1723 | ||
1724 | /* All good. Don't send back the write positive ret value. */ | |
1725 | ret = 0; | |
1726 | error: | |
6cd525e8 | 1727 | return (int) ret; |
d0b96690 DG |
1728 | } |
1729 | ||
f45e313d DG |
1730 | /* |
1731 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1732 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1733 | * notify socket is never received. | |
1734 | */ | |
1735 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1736 | { | |
1737 | int ret, nb_fd = 0, i; | |
1738 | unsigned int fd_added = 0; | |
1739 | struct lttng_poll_event events; | |
1740 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1741 | ||
1742 | assert(wait_queue); | |
1743 | ||
1744 | lttng_poll_init(&events); | |
1745 | ||
1746 | /* Just skip everything for an empty queue. */ | |
1747 | if (!wait_queue->count) { | |
1748 | goto end; | |
1749 | } | |
1750 | ||
1751 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1752 | if (ret < 0) { | |
1753 | goto error_create; | |
1754 | } | |
1755 | ||
1756 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1757 | &wait_queue->head, head) { | |
1758 | assert(wait_node->app); | |
1759 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1760 | LPOLLHUP | LPOLLERR); | |
1761 | if (ret < 0) { | |
1762 | goto error; | |
1763 | } | |
1764 | ||
1765 | fd_added = 1; | |
1766 | } | |
1767 | ||
1768 | if (!fd_added) { | |
1769 | goto end; | |
1770 | } | |
1771 | ||
1772 | /* | |
1773 | * Poll but don't block so we can quickly identify the faulty events and | |
1774 | * clean them afterwards from the wait queue. | |
1775 | */ | |
1776 | ret = lttng_poll_wait(&events, 0); | |
1777 | if (ret < 0) { | |
1778 | goto error; | |
1779 | } | |
1780 | nb_fd = ret; | |
1781 | ||
1782 | for (i = 0; i < nb_fd; i++) { | |
1783 | /* Get faulty FD. */ | |
1784 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1785 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1786 | ||
fd20dac9 MD |
1787 | if (!revents) { |
1788 | /* No activity for this FD (poll implementation). */ | |
1789 | continue; | |
1790 | } | |
1791 | ||
f45e313d DG |
1792 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1793 | &wait_queue->head, head) { | |
1794 | if (pollfd == wait_node->app->sock && | |
1795 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1796 | cds_list_del(&wait_node->head); | |
1797 | wait_queue->count--; | |
1798 | ust_app_destroy(wait_node->app); | |
1799 | free(wait_node); | |
48b40bcf JG |
1800 | /* |
1801 | * Silence warning of use-after-free in | |
1802 | * cds_list_for_each_entry_safe which uses | |
1803 | * __typeof__(*wait_node). | |
1804 | */ | |
1805 | wait_node = NULL; | |
f45e313d | 1806 | break; |
03e43155 MD |
1807 | } else { |
1808 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1809 | goto error; | |
f45e313d DG |
1810 | } |
1811 | } | |
1812 | } | |
1813 | ||
1814 | if (nb_fd > 0) { | |
1815 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1816 | } | |
1817 | ||
1818 | end: | |
1819 | lttng_poll_clean(&events); | |
1820 | return; | |
1821 | ||
1822 | error: | |
1823 | lttng_poll_clean(&events); | |
1824 | error_create: | |
1825 | ERR("Unable to sanitize wait queue"); | |
1826 | return; | |
1827 | } | |
1828 | ||
099e26bd DG |
1829 | /* |
1830 | * Dispatch request from the registration threads to the application | |
1831 | * communication thread. | |
1832 | */ | |
1833 | static void *thread_dispatch_ust_registration(void *data) | |
1834 | { | |
12e2b881 | 1835 | int ret, err = -1; |
8bdee6e2 | 1836 | struct cds_wfcq_node *node; |
099e26bd | 1837 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1838 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1839 | struct ust_reg_wait_queue wait_queue = { | |
1840 | .count = 0, | |
1841 | }; | |
d0b96690 | 1842 | |
967e3668 MD |
1843 | rcu_register_thread(); |
1844 | ||
6c71277b | 1845 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1846 | |
9ad42ec1 MD |
1847 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1848 | goto error_testpoint; | |
1849 | } | |
1850 | ||
12e2b881 MD |
1851 | health_code_update(); |
1852 | ||
f45e313d | 1853 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1854 | |
1855 | DBG("[thread] Dispatch UST command started"); | |
1856 | ||
0ed3b1a8 | 1857 | for (;;) { |
12e2b881 MD |
1858 | health_code_update(); |
1859 | ||
099e26bd DG |
1860 | /* Atomically prepare the queue futex */ |
1861 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1862 | ||
0ed3b1a8 MD |
1863 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1864 | break; | |
1865 | } | |
1866 | ||
099e26bd | 1867 | do { |
d0b96690 | 1868 | struct ust_app *app = NULL; |
7972aab2 | 1869 | ust_cmd = NULL; |
d0b96690 | 1870 | |
f45e313d DG |
1871 | /* |
1872 | * Make sure we don't have node(s) that have hung up before receiving | |
1873 | * the notify socket. This is to clean the list in order to avoid | |
1874 | * memory leaks from notify socket that are never seen. | |
1875 | */ | |
1876 | sanitize_wait_queue(&wait_queue); | |
1877 | ||
12e2b881 | 1878 | health_code_update(); |
099e26bd | 1879 | /* Dequeue command for registration */ |
8bdee6e2 | 1880 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1881 | if (node == NULL) { |
00a17c97 | 1882 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1883 | /* Continue thread execution */ |
1884 | break; | |
1885 | } | |
1886 | ||
1887 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1888 | ||
2f50c8a3 DG |
1889 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1890 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1891 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1892 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1893 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1894 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1895 | |
1896 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1897 | wait_node = zmalloc(sizeof(*wait_node)); | |
1898 | if (!wait_node) { | |
1899 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1900 | ret = close(ust_cmd->sock); |
1901 | if (ret < 0) { | |
1902 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1903 | } | |
51dec90d | 1904 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1905 | free(ust_cmd); |
d0b96690 DG |
1906 | goto error; |
1907 | } | |
1908 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1909 | ||
1910 | /* Create application object if socket is CMD. */ | |
1911 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1912 | ust_cmd->sock); | |
1913 | if (!wait_node->app) { | |
1914 | ret = close(ust_cmd->sock); | |
1915 | if (ret < 0) { | |
1916 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1917 | } |
51dec90d | 1918 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1919 | free(wait_node); |
7972aab2 | 1920 | free(ust_cmd); |
d0b96690 DG |
1921 | continue; |
1922 | } | |
1923 | /* | |
1924 | * Add application to the wait queue so we can set the notify | |
1925 | * socket before putting this object in the global ht. | |
1926 | */ | |
f45e313d DG |
1927 | cds_list_add(&wait_node->head, &wait_queue.head); |
1928 | wait_queue.count++; | |
d0b96690 | 1929 | |
7972aab2 | 1930 | free(ust_cmd); |
d0b96690 DG |
1931 | /* |
1932 | * We have to continue here since we don't have the notify | |
1933 | * socket and the application MUST be added to the hash table | |
1934 | * only at that moment. | |
1935 | */ | |
1936 | continue; | |
1937 | } else { | |
1938 | /* | |
1939 | * Look for the application in the local wait queue and set the | |
1940 | * notify socket if found. | |
1941 | */ | |
d88aee68 | 1942 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1943 | &wait_queue.head, head) { |
12e2b881 | 1944 | health_code_update(); |
d0b96690 DG |
1945 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1946 | wait_node->app->notify_sock = ust_cmd->sock; | |
1947 | cds_list_del(&wait_node->head); | |
f45e313d | 1948 | wait_queue.count--; |
d0b96690 DG |
1949 | app = wait_node->app; |
1950 | free(wait_node); | |
1951 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1952 | break; | |
1953 | } | |
1954 | } | |
020d7f60 DG |
1955 | |
1956 | /* | |
1957 | * With no application at this stage the received socket is | |
1958 | * basically useless so close it before we free the cmd data | |
1959 | * structure for good. | |
1960 | */ | |
1961 | if (!app) { | |
1962 | ret = close(ust_cmd->sock); | |
1963 | if (ret < 0) { | |
1964 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1965 | } | |
51dec90d | 1966 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1967 | } |
7972aab2 | 1968 | free(ust_cmd); |
d0b96690 DG |
1969 | } |
1970 | ||
1971 | if (app) { | |
d0b96690 DG |
1972 | /* |
1973 | * @session_lock_list | |
1974 | * | |
1975 | * Lock the global session list so from the register up to the | |
1976 | * registration done message, no thread can see the application | |
1977 | * and change its state. | |
1978 | */ | |
1979 | session_lock_list(); | |
1980 | rcu_read_lock(); | |
d88aee68 | 1981 | |
d0b96690 DG |
1982 | /* |
1983 | * Add application to the global hash table. This needs to be | |
1984 | * done before the update to the UST registry can locate the | |
1985 | * application. | |
1986 | */ | |
1987 | ust_app_add(app); | |
d88aee68 DG |
1988 | |
1989 | /* Set app version. This call will print an error if needed. */ | |
1990 | (void) ust_app_version(app); | |
1991 | ||
1992 | /* Send notify socket through the notify pipe. */ | |
1993 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1994 | app->notify_sock); | |
1995 | if (ret < 0) { | |
1996 | rcu_read_unlock(); | |
1997 | session_unlock_list(); | |
b85dc84c DG |
1998 | /* |
1999 | * No notify thread, stop the UST tracing. However, this is | |
2000 | * not an internal error of the this thread thus setting | |
2001 | * the health error code to a normal exit. | |
2002 | */ | |
2003 | err = 0; | |
d88aee68 | 2004 | goto error; |
6620da75 | 2005 | } |
d88aee68 | 2006 | |
d0b96690 DG |
2007 | /* |
2008 | * Update newly registered application with the tracing | |
2009 | * registry info already enabled information. | |
2010 | */ | |
2011 | update_ust_app(app->sock); | |
d88aee68 DG |
2012 | |
2013 | /* | |
2014 | * Don't care about return value. Let the manage apps threads | |
2015 | * handle app unregistration upon socket close. | |
2016 | */ | |
fb45065e | 2017 | (void) ust_app_register_done(app); |
d88aee68 DG |
2018 | |
2019 | /* | |
2020 | * Even if the application socket has been closed, send the app | |
2021 | * to the thread and unregistration will take place at that | |
2022 | * place. | |
2023 | */ | |
2024 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2025 | if (ret < 0) { |
d88aee68 DG |
2026 | rcu_read_unlock(); |
2027 | session_unlock_list(); | |
b85dc84c DG |
2028 | /* |
2029 | * No apps. thread, stop the UST tracing. However, this is | |
2030 | * not an internal error of the this thread thus setting | |
2031 | * the health error code to a normal exit. | |
2032 | */ | |
2033 | err = 0; | |
d88aee68 | 2034 | goto error; |
d0b96690 | 2035 | } |
d88aee68 | 2036 | |
d0b96690 DG |
2037 | rcu_read_unlock(); |
2038 | session_unlock_list(); | |
099e26bd | 2039 | } |
099e26bd DG |
2040 | } while (node != NULL); |
2041 | ||
12e2b881 | 2042 | health_poll_entry(); |
099e26bd DG |
2043 | /* Futex wait on queue. Blocking call on futex() */ |
2044 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2045 | health_poll_exit(); |
099e26bd | 2046 | } |
12e2b881 MD |
2047 | /* Normal exit, no error */ |
2048 | err = 0; | |
099e26bd DG |
2049 | |
2050 | error: | |
d88aee68 DG |
2051 | /* Clean up wait queue. */ |
2052 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2053 | &wait_queue.head, head) { |
d88aee68 | 2054 | cds_list_del(&wait_node->head); |
f45e313d | 2055 | wait_queue.count--; |
d88aee68 DG |
2056 | free(wait_node); |
2057 | } | |
2058 | ||
772b8f4d MD |
2059 | /* Empty command queue. */ |
2060 | for (;;) { | |
2061 | /* Dequeue command for registration */ | |
2062 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2063 | if (node == NULL) { | |
2064 | break; | |
2065 | } | |
2066 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2067 | ret = close(ust_cmd->sock); | |
2068 | if (ret < 0) { | |
2069 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2070 | } | |
2071 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2072 | free(ust_cmd); | |
2073 | } | |
2074 | ||
9ad42ec1 | 2075 | error_testpoint: |
099e26bd | 2076 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2077 | if (err) { |
2078 | health_error(); | |
2079 | ERR("Health error occurred in %s", __func__); | |
2080 | } | |
8782cc74 | 2081 | health_unregister(health_sessiond); |
967e3668 | 2082 | rcu_unregister_thread(); |
099e26bd DG |
2083 | return NULL; |
2084 | } | |
2085 | ||
2086 | /* | |
2087 | * This thread manage application registration. | |
2088 | */ | |
2089 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2090 | { |
139ac872 | 2091 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2092 | uint32_t revents, nb_fd; |
2093 | struct lttng_poll_event events; | |
099e26bd DG |
2094 | /* |
2095 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2096 | * freed in the manage apps thread. | |
2097 | */ | |
2098 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2099 | |
099e26bd | 2100 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2101 | |
6c71277b | 2102 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2103 | |
e547b070 | 2104 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2105 | goto error_testpoint; |
2106 | } | |
8ac94142 | 2107 | |
1d4b027a DG |
2108 | ret = lttcomm_listen_unix_sock(apps_sock); |
2109 | if (ret < 0) { | |
76d7553f | 2110 | goto error_listen; |
1d4b027a DG |
2111 | } |
2112 | ||
5eb91c98 DG |
2113 | /* |
2114 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2115 | * more will be added to this poll set. | |
2116 | */ | |
d0b96690 | 2117 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2118 | if (ret < 0) { |
76d7553f | 2119 | goto error_create_poll; |
5eb91c98 | 2120 | } |
273ea72c | 2121 | |
5eb91c98 DG |
2122 | /* Add the application registration socket */ |
2123 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2124 | if (ret < 0) { | |
76d7553f | 2125 | goto error_poll_add; |
5eb91c98 | 2126 | } |
273ea72c | 2127 | |
1d4b027a | 2128 | /* Notify all applications to register */ |
0fdd1e2c DG |
2129 | ret = notify_ust_apps(1); |
2130 | if (ret < 0) { | |
2131 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2132 | "Execution continues but there might be problem for already\n" |
2133 | "running applications that wishes to register."); | |
0fdd1e2c | 2134 | } |
1d4b027a DG |
2135 | |
2136 | while (1) { | |
2137 | DBG("Accepting application registration"); | |
273ea72c DG |
2138 | |
2139 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2140 | restart: |
a78af745 | 2141 | health_poll_entry(); |
5eb91c98 | 2142 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2143 | health_poll_exit(); |
273ea72c | 2144 | if (ret < 0) { |
88f2b785 MD |
2145 | /* |
2146 | * Restart interrupted system call. | |
2147 | */ | |
2148 | if (errno == EINTR) { | |
2149 | goto restart; | |
2150 | } | |
273ea72c DG |
2151 | goto error; |
2152 | } | |
2153 | ||
0d9c5d77 DG |
2154 | nb_fd = ret; |
2155 | ||
5eb91c98 | 2156 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2157 | health_code_update(); |
139ac872 | 2158 | |
5eb91c98 DG |
2159 | /* Fetch once the poll data */ |
2160 | revents = LTTNG_POLL_GETEV(&events, i); | |
2161 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2162 | |
fd20dac9 MD |
2163 | if (!revents) { |
2164 | /* No activity for this FD (poll implementation). */ | |
2165 | continue; | |
2166 | } | |
2167 | ||
5eb91c98 | 2168 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2169 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2170 | if (ret) { |
139ac872 MD |
2171 | err = 0; |
2172 | goto exit; | |
90014c57 | 2173 | } |
1d4b027a | 2174 | |
5eb91c98 DG |
2175 | /* Event on the registration socket */ |
2176 | if (pollfd == apps_sock) { | |
03e43155 | 2177 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2178 | sock = lttcomm_accept_unix_sock(apps_sock); |
2179 | if (sock < 0) { | |
2180 | goto error; | |
2181 | } | |
099e26bd | 2182 | |
16c5c8fa DG |
2183 | /* |
2184 | * Set socket timeout for both receiving and ending. | |
2185 | * app_socket_timeout is in seconds, whereas | |
2186 | * lttcomm_setsockopt_rcv_timeout and | |
2187 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2188 | * parameter. | |
2189 | */ | |
e6142f2e | 2190 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2191 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2192 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2193 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2194 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2195 | } |
16c5c8fa | 2196 | |
b662582b DG |
2197 | /* |
2198 | * Set the CLOEXEC flag. Return code is useless because | |
2199 | * either way, the show must go on. | |
2200 | */ | |
2201 | (void) utils_set_fd_cloexec(sock); | |
2202 | ||
5eb91c98 | 2203 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2204 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2205 | if (ust_cmd == NULL) { |
76d7553f | 2206 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2207 | ret = close(sock); |
2208 | if (ret) { | |
2209 | PERROR("close"); | |
2210 | } | |
5eb91c98 DG |
2211 | goto error; |
2212 | } | |
1d4b027a | 2213 | |
5eb91c98 DG |
2214 | /* |
2215 | * Using message-based transmissions to ensure we don't | |
2216 | * have to deal with partially received messages. | |
2217 | */ | |
4063050c MD |
2218 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2219 | if (ret < 0) { | |
2220 | ERR("Exhausted file descriptors allowed for applications."); | |
2221 | free(ust_cmd); | |
2222 | ret = close(sock); | |
2223 | if (ret) { | |
2224 | PERROR("close"); | |
2225 | } | |
2226 | sock = -1; | |
2227 | continue; | |
2228 | } | |
d88aee68 | 2229 | |
840cb59c | 2230 | health_code_update(); |
d0b96690 DG |
2231 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2232 | if (ret < 0) { | |
5eb91c98 | 2233 | free(ust_cmd); |
d0b96690 | 2234 | /* Close socket of the application. */ |
76d7553f MD |
2235 | ret = close(sock); |
2236 | if (ret) { | |
2237 | PERROR("close"); | |
2238 | } | |
4063050c | 2239 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2240 | sock = -1; |
5eb91c98 DG |
2241 | continue; |
2242 | } | |
840cb59c | 2243 | health_code_update(); |
099e26bd | 2244 | |
5eb91c98 | 2245 | ust_cmd->sock = sock; |
34a2494f | 2246 | sock = -1; |
099e26bd | 2247 | |
5eb91c98 DG |
2248 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2249 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2250 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2251 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2252 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2253 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2254 | |
5eb91c98 DG |
2255 | /* |
2256 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2257 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2258 | */ |
8bdee6e2 | 2259 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2260 | |
2261 | /* | |
2262 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2263 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2264 | */ |
2265 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2266 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2267 | ERR("Register apps socket poll error"); | |
2268 | goto error; | |
2269 | } else { | |
2270 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2271 | goto error; | |
5eb91c98 DG |
2272 | } |
2273 | } | |
90014c57 | 2274 | } |
1d4b027a DG |
2275 | } |
2276 | ||
139ac872 | 2277 | exit: |
1d4b027a | 2278 | error: |
0fdd1e2c DG |
2279 | /* Notify that the registration thread is gone */ |
2280 | notify_ust_apps(0); | |
2281 | ||
a4b35e07 | 2282 | if (apps_sock >= 0) { |
76d7553f MD |
2283 | ret = close(apps_sock); |
2284 | if (ret) { | |
2285 | PERROR("close"); | |
2286 | } | |
a4b35e07 | 2287 | } |
46c3f085 | 2288 | if (sock >= 0) { |
76d7553f MD |
2289 | ret = close(sock); |
2290 | if (ret) { | |
2291 | PERROR("close"); | |
2292 | } | |
4063050c | 2293 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2294 | } |
e6142f2e | 2295 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2296 | |
76d7553f | 2297 | error_poll_add: |
5eb91c98 | 2298 | lttng_poll_clean(&events); |
76d7553f MD |
2299 | error_listen: |
2300 | error_create_poll: | |
6993eeb3 | 2301 | error_testpoint: |
76d7553f | 2302 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2303 | if (err) { |
2304 | health_error(); | |
2305 | ERR("Health error occurred in %s", __func__); | |
2306 | } | |
8782cc74 | 2307 | health_unregister(health_sessiond); |
5eb91c98 | 2308 | |
1d4b027a DG |
2309 | return NULL; |
2310 | } | |
2311 | ||
8c0faa1d | 2312 | /* |
3bd1e081 | 2313 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2314 | * exec or it will fails. |
8c0faa1d | 2315 | */ |
3bd1e081 | 2316 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2317 | { |
a23ec3a7 | 2318 | int ret, clock_ret; |
ee0b0061 DG |
2319 | struct timespec timeout; |
2320 | ||
13a7bce3 JG |
2321 | /* |
2322 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2323 | * This access to consumer_thread_is_ready does not need to be | |
2324 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2325 | * management thread has not been started at this point. | |
2326 | */ | |
a23ec3a7 | 2327 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2328 | |
a23ec3a7 DG |
2329 | /* Setup pthread condition */ |
2330 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2331 | if (ret) { |
a23ec3a7 DG |
2332 | errno = ret; |
2333 | PERROR("pthread_condattr_init consumer data"); | |
2334 | goto error; | |
2335 | } | |
2336 | ||
2337 | /* | |
2338 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2339 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2340 | * for a more details and how we noticed it. | |
2341 | */ | |
2342 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2343 | if (ret) { |
a23ec3a7 DG |
2344 | errno = ret; |
2345 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2346 | goto error; |
2347 | } | |
8c0faa1d | 2348 | |
a23ec3a7 | 2349 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2350 | if (ret) { |
a23ec3a7 DG |
2351 | errno = ret; |
2352 | PERROR("pthread_cond_init consumer data"); | |
2353 | goto error; | |
2354 | } | |
2355 | ||
1a1a34b4 MJ |
2356 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2357 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2358 | if (ret) { |
2359 | errno = ret; | |
3bd1e081 | 2360 | PERROR("pthread_create consumer"); |
ee0b0061 | 2361 | ret = -1; |
8c0faa1d DG |
2362 | goto error; |
2363 | } | |
2364 | ||
a23ec3a7 DG |
2365 | /* We are about to wait on a pthread condition */ |
2366 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2367 | ||
ee0b0061 | 2368 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2369 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2370 | /* |
2371 | * Set the timeout for the condition timed wait even if the clock gettime | |
2372 | * call fails since we might loop on that call and we want to avoid to | |
2373 | * increment the timeout too many times. | |
2374 | */ | |
2375 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2376 | ||
2377 | /* | |
2378 | * The following loop COULD be skipped in some conditions so this is why we | |
2379 | * set ret to 0 in order to make sure at least one round of the loop is | |
2380 | * done. | |
2381 | */ | |
2382 | ret = 0; | |
2383 | ||
2384 | /* | |
2385 | * Loop until the condition is reached or when a timeout is reached. Note | |
2386 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2387 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2388 | * possible. This loop does not take any chances and works with both of | |
2389 | * them. | |
2390 | */ | |
2391 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2392 | if (clock_ret < 0) { | |
2393 | PERROR("clock_gettime spawn consumer"); | |
2394 | /* Infinite wait for the consumerd thread to be ready */ | |
2395 | ret = pthread_cond_wait(&consumer_data->cond, | |
2396 | &consumer_data->cond_mutex); | |
2397 | } else { | |
2398 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2399 | &consumer_data->cond_mutex, &timeout); | |
2400 | } | |
ee0b0061 | 2401 | } |
8c0faa1d | 2402 | |
a23ec3a7 DG |
2403 | /* Release the pthread condition */ |
2404 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2405 | ||
2406 | if (ret != 0) { | |
2407 | errno = ret; | |
2408 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2409 | int pth_ret; |
2410 | ||
ee0b0061 DG |
2411 | /* |
2412 | * Call has timed out so we kill the kconsumerd_thread and return | |
2413 | * an error. | |
2414 | */ | |
a23ec3a7 DG |
2415 | ERR("Condition timed out. The consumer thread was never ready." |
2416 | " Killing it"); | |
4282f9a3 DG |
2417 | pth_ret = pthread_cancel(consumer_data->thread); |
2418 | if (pth_ret < 0) { | |
3bd1e081 | 2419 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2420 | } |
2421 | } else { | |
a23ec3a7 | 2422 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2423 | } |
4282f9a3 DG |
2424 | /* Caller is expecting a negative value on failure. */ |
2425 | ret = -1; | |
ee0b0061 DG |
2426 | goto error; |
2427 | } | |
2428 | ||
3bd1e081 MD |
2429 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2430 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2431 | ERR("Consumerd did not start"); |
3bd1e081 | 2432 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2433 | goto error; |
2434 | } | |
3bd1e081 | 2435 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2436 | |
8c0faa1d DG |
2437 | return 0; |
2438 | ||
2439 | error: | |
2440 | return ret; | |
2441 | } | |
2442 | ||
d9800920 | 2443 | /* |
3bd1e081 | 2444 | * Join consumer thread |
d9800920 | 2445 | */ |
3bd1e081 | 2446 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2447 | { |
2448 | void *status; | |
cf3af59e | 2449 | |
e8209f6b DG |
2450 | /* Consumer pid must be a real one. */ |
2451 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2452 | int ret; |
3bd1e081 | 2453 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2454 | if (ret) { |
4a15001e | 2455 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2456 | return ret; |
2457 | } | |
3bd1e081 | 2458 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2459 | } else { |
2460 | return 0; | |
2461 | } | |
2462 | } | |
2463 | ||
8c0faa1d | 2464 | /* |
3bd1e081 | 2465 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2466 | * |
d063d709 | 2467 | * Return pid if successful else -1. |
8c0faa1d | 2468 | */ |
3bd1e081 | 2469 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2470 | { |
2471 | int ret; | |
2472 | pid_t pid; | |
94c55f17 | 2473 | const char *consumer_to_use; |
53086306 | 2474 | const char *verbosity; |
94c55f17 | 2475 | struct stat st; |
8c0faa1d | 2476 | |
3bd1e081 | 2477 | DBG("Spawning consumerd"); |
c49dc785 | 2478 | |
8c0faa1d DG |
2479 | pid = fork(); |
2480 | if (pid == 0) { | |
2481 | /* | |
3bd1e081 | 2482 | * Exec consumerd. |
8c0faa1d | 2483 | */ |
e6142f2e | 2484 | if (config.verbose_consumer) { |
53086306 | 2485 | verbosity = "--verbose"; |
4421f712 | 2486 | } else if (lttng_opt_quiet) { |
53086306 | 2487 | verbosity = "--quiet"; |
4421f712 DG |
2488 | } else { |
2489 | verbosity = ""; | |
53086306 | 2490 | } |
4421f712 | 2491 | |
3bd1e081 MD |
2492 | switch (consumer_data->type) { |
2493 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2494 | /* |
c7704d57 DG |
2495 | * Find out which consumerd to execute. We will first try the |
2496 | * 64-bit path, then the sessiond's installation directory, and | |
2497 | * fallback on the 32-bit one, | |
94c55f17 | 2498 | */ |
63a799e8 | 2499 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2500 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2501 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2502 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2503 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2504 | DBG3("Found location #1"); |
e6142f2e JG |
2505 | consumer_to_use = config.consumerd64_bin_path.value; |
2506 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2507 | DBG3("Found location #2"); |
e6142f2e JG |
2508 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
2509 | } else if (stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2510 | DBG3("Found location #3"); |
e6142f2e | 2511 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2512 | } else { |
63a799e8 | 2513 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2514 | ret = -EINVAL; |
3d678709 | 2515 | goto error; |
94c55f17 AM |
2516 | } |
2517 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2518 | (void) execl(consumer_to_use, |
94c55f17 AM |
2519 | "lttng-consumerd", verbosity, "-k", |
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, |
94c55f17 | 2523 | NULL); |
3bd1e081 | 2524 | break; |
7753dea8 MD |
2525 | case LTTNG_CONSUMER64_UST: |
2526 | { | |
46b23495 | 2527 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2528 | char *tmp; |
2529 | size_t tmplen; | |
ddaec4a2 | 2530 | char *tmpnew; |
8f4905da | 2531 | |
e8fa9fb0 | 2532 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2533 | if (!tmp) { |
2534 | tmp = ""; | |
2535 | } | |
d222983e | 2536 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2537 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2538 | if (!tmpnew) { | |
2539 | ret = -ENOMEM; | |
2540 | goto error; | |
2541 | } | |
e6142f2e | 2542 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2543 | if (tmp[0] != '\0') { |
2544 | strcat(tmpnew, ":"); | |
2545 | strcat(tmpnew, tmp); | |
2546 | } | |
d222983e | 2547 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2548 | free(tmpnew); |
8f4905da MD |
2549 | if (ret) { |
2550 | ret = -errno; | |
2551 | goto error; | |
2552 | } | |
2553 | } | |
e6142f2e JG |
2554 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2555 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2556 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2557 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2558 | "--group", config.tracing_group_name.value, |
7753dea8 | 2559 | NULL); |
3bd1e081 | 2560 | break; |
7753dea8 MD |
2561 | } |
2562 | case LTTNG_CONSUMER32_UST: | |
2563 | { | |
46b23495 | 2564 | if (config.consumerd32_lib_dir.value) { |
8f4905da MD |
2565 | char *tmp; |
2566 | size_t tmplen; | |
ddaec4a2 | 2567 | char *tmpnew; |
8f4905da | 2568 | |
e8fa9fb0 | 2569 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2570 | if (!tmp) { |
2571 | tmp = ""; | |
2572 | } | |
d222983e | 2573 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2574 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2575 | if (!tmpnew) { | |
2576 | ret = -ENOMEM; | |
2577 | goto error; | |
2578 | } | |
e6142f2e | 2579 | strcat(tmpnew, config.consumerd32_lib_dir.value); |
8f4905da MD |
2580 | if (tmp[0] != '\0') { |
2581 | strcat(tmpnew, ":"); | |
2582 | strcat(tmpnew, tmp); | |
2583 | } | |
d222983e | 2584 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2585 | free(tmpnew); |
8f4905da MD |
2586 | if (ret) { |
2587 | ret = -errno; | |
2588 | goto error; | |
2589 | } | |
2590 | } | |
e6142f2e JG |
2591 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2592 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2593 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2594 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2595 | "--group", config.tracing_group_name.value, |
7753dea8 MD |
2596 | NULL); |
2597 | break; | |
2598 | } | |
3bd1e081 | 2599 | default: |
b60e7183 | 2600 | ERR("unknown consumer type"); |
e9d6b496 | 2601 | errno = 0; |
3bd1e081 | 2602 | } |
8c0faa1d | 2603 | if (errno != 0) { |
4282f9a3 | 2604 | PERROR("Consumer execl()"); |
8c0faa1d | 2605 | } |
4282f9a3 | 2606 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2607 | exit(EXIT_FAILURE); |
2608 | } else if (pid > 0) { | |
2609 | ret = pid; | |
8c0faa1d | 2610 | } else { |
76d7553f | 2611 | PERROR("start consumer fork"); |
8c0faa1d | 2612 | ret = -errno; |
8c0faa1d | 2613 | } |
8f4905da | 2614 | error: |
8c0faa1d DG |
2615 | return ret; |
2616 | } | |
2617 | ||
693bd40b | 2618 | /* |
3bd1e081 | 2619 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2620 | */ |
3bd1e081 | 2621 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2622 | { |
c617c0c6 | 2623 | int ret; |
edb8b045 DG |
2624 | |
2625 | /* | |
2626 | * Set the listen() state on the socket since there is a possible race | |
2627 | * between the exec() of the consumer daemon and this call if place in the | |
2628 | * consumer thread. See bug #366 for more details. | |
2629 | */ | |
2630 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2631 | if (ret < 0) { | |
2632 | goto error; | |
2633 | } | |
693bd40b | 2634 | |
3bd1e081 MD |
2635 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2636 | if (consumer_data->pid != 0) { | |
2637 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2638 | goto end; |
2639 | } | |
693bd40b | 2640 | |
3bd1e081 | 2641 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2642 | if (ret < 0) { |
3bd1e081 MD |
2643 | ERR("Spawning consumerd failed"); |
2644 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2645 | goto error; |
693bd40b | 2646 | } |
c49dc785 | 2647 | |
3bd1e081 MD |
2648 | /* Setting up the consumer_data pid */ |
2649 | consumer_data->pid = ret; | |
48842b30 | 2650 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2651 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2652 | |
3bd1e081 MD |
2653 | DBG2("Spawning consumer control thread"); |
2654 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2655 | if (ret < 0) { |
3bd1e081 | 2656 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2657 | goto error; |
2658 | } | |
2659 | ||
c49dc785 | 2660 | end: |
693bd40b DG |
2661 | return 0; |
2662 | ||
2663 | error: | |
331744e3 | 2664 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2665 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2666 | int err; |
2667 | ||
edb8b045 DG |
2668 | err = close(consumer_data->err_sock); |
2669 | if (err < 0) { | |
2670 | PERROR("close consumer data error socket"); | |
2671 | } | |
2672 | } | |
693bd40b DG |
2673 | return ret; |
2674 | } | |
2675 | ||
b73401da | 2676 | /* |
096102bd | 2677 | * Setup necessary data for kernel tracer action. |
b73401da | 2678 | */ |
096102bd | 2679 | static int init_kernel_tracer(void) |
b73401da DG |
2680 | { |
2681 | int ret; | |
b73401da | 2682 | |
096102bd DG |
2683 | /* Modprobe lttng kernel modules */ |
2684 | ret = modprobe_lttng_control(); | |
b73401da | 2685 | if (ret < 0) { |
b73401da DG |
2686 | goto error; |
2687 | } | |
2688 | ||
096102bd DG |
2689 | /* Open debugfs lttng */ |
2690 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2691 | if (kernel_tracer_fd < 0) { | |
2692 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2693 | goto error_open; |
54d01ffb DG |
2694 | } |
2695 | ||
2f77fc4b | 2696 | /* Validate kernel version */ |
88076e89 JD |
2697 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2698 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2699 | if (ret < 0) { |
2700 | goto error_version; | |
b551a063 | 2701 | } |
54d01ffb | 2702 | |
2f77fc4b DG |
2703 | ret = modprobe_lttng_data(); |
2704 | if (ret < 0) { | |
2705 | goto error_modules; | |
54d01ffb DG |
2706 | } |
2707 | ||
6e21424e JR |
2708 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2709 | kernel_tracer_fd); | |
2710 | if (ret < 0) { | |
2711 | goto error_modules; | |
2712 | } | |
2713 | ||
2714 | if (ret < 1) { | |
2715 | WARN("Kernel tracer does not support buffer monitoring. " | |
2716 | "The monitoring timer of channels in the kernel domain " | |
2717 | "will be set to 0 (disabled)."); | |
2718 | } | |
2719 | ||
2f77fc4b DG |
2720 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2721 | return 0; | |
2722 | ||
2723 | error_version: | |
2724 | modprobe_remove_lttng_control(); | |
2725 | ret = close(kernel_tracer_fd); | |
2726 | if (ret) { | |
2727 | PERROR("close"); | |
b551a063 | 2728 | } |
2f77fc4b | 2729 | kernel_tracer_fd = -1; |
f73fabfd | 2730 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2731 | |
2f77fc4b DG |
2732 | error_modules: |
2733 | ret = close(kernel_tracer_fd); | |
2734 | if (ret) { | |
2735 | PERROR("close"); | |
b551a063 | 2736 | } |
54d01ffb | 2737 | |
2f77fc4b DG |
2738 | error_open: |
2739 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2740 | |
2741 | error: | |
2f77fc4b DG |
2742 | WARN("No kernel tracer available"); |
2743 | kernel_tracer_fd = -1; | |
2744 | if (!is_root) { | |
f73fabfd | 2745 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2746 | } else { |
f73fabfd | 2747 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2748 | } |
54d01ffb DG |
2749 | } |
2750 | ||
2f77fc4b | 2751 | |
54d01ffb | 2752 | /* |
2f77fc4b DG |
2753 | * Copy consumer output from the tracing session to the domain session. The |
2754 | * function also applies the right modification on a per domain basis for the | |
2755 | * trace files destination directory. | |
36b588ed MD |
2756 | * |
2757 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2758 | */ |
2f77fc4b | 2759 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2760 | { |
2761 | int ret; | |
2f77fc4b DG |
2762 | const char *dir_name; |
2763 | struct consumer_output *consumer; | |
2764 | ||
2765 | assert(session); | |
2766 | assert(session->consumer); | |
54d01ffb | 2767 | |
b551a063 DG |
2768 | switch (domain) { |
2769 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2770 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2771 | /* |
2772 | * XXX: We should audit the session creation and what this function | |
2773 | * does "extra" in order to avoid a destroy since this function is used | |
2774 | * in the domain session creation (kernel and ust) only. Same for UST | |
2775 | * domain. | |
2776 | */ | |
2777 | if (session->kernel_session->consumer) { | |
6addfa37 | 2778 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2779 | } |
2f77fc4b DG |
2780 | session->kernel_session->consumer = |
2781 | consumer_copy_output(session->consumer); | |
2782 | /* Ease our life a bit for the next part */ | |
2783 | consumer = session->kernel_session->consumer; | |
2784 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2785 | break; |
f20baf8e | 2786 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2787 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2788 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2789 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2790 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2791 | if (session->ust_session->consumer) { |
6addfa37 | 2792 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2793 | } |
2f77fc4b DG |
2794 | session->ust_session->consumer = |
2795 | consumer_copy_output(session->consumer); | |
2796 | /* Ease our life a bit for the next part */ | |
2797 | consumer = session->ust_session->consumer; | |
2798 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2799 | break; |
2800 | default: | |
f73fabfd | 2801 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2802 | goto error; |
2803 | } | |
2804 | ||
2f77fc4b | 2805 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2806 | strncat(consumer->subdir, dir_name, |
2807 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2808 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2809 | ||
f73fabfd | 2810 | ret = LTTNG_OK; |
54d01ffb DG |
2811 | |
2812 | error: | |
2813 | return ret; | |
2814 | } | |
2815 | ||
00e2e675 | 2816 | /* |
2f77fc4b | 2817 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2818 | * |
2819 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2820 | */ |
2f77fc4b DG |
2821 | static int create_ust_session(struct ltt_session *session, |
2822 | struct lttng_domain *domain) | |
00e2e675 DG |
2823 | { |
2824 | int ret; | |
2f77fc4b | 2825 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2826 | |
a4b92340 | 2827 | assert(session); |
2f77fc4b DG |
2828 | assert(domain); |
2829 | assert(session->consumer); | |
a4b92340 | 2830 | |
2f77fc4b | 2831 | switch (domain->type) { |
f20baf8e | 2832 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2833 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2834 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2835 | case LTTNG_DOMAIN_UST: |
2836 | break; | |
2837 | default: | |
2838 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2839 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2840 | goto error; |
2841 | } | |
2842 | ||
2f77fc4b DG |
2843 | DBG("Creating UST session"); |
2844 | ||
dec56f6c | 2845 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2846 | if (lus == NULL) { |
f73fabfd | 2847 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2848 | goto error; |
2849 | } | |
2850 | ||
2f77fc4b DG |
2851 | lus->uid = session->uid; |
2852 | lus->gid = session->gid; | |
2bba9e53 | 2853 | lus->output_traces = session->output_traces; |
27babd3a | 2854 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2855 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2856 | session->ust_session = lus; |
d7ba1388 | 2857 | if (session->shm_path[0]) { |
3d071855 MD |
2858 | strncpy(lus->root_shm_path, session->shm_path, |
2859 | sizeof(lus->root_shm_path)); | |
2860 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2861 | strncpy(lus->shm_path, session->shm_path, |
2862 | sizeof(lus->shm_path)); | |
2863 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2864 | strncat(lus->shm_path, "/ust", | |
2865 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2866 | } | |
2f77fc4b DG |
2867 | /* Copy session output to the newly created UST session */ |
2868 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2869 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2870 | goto error; |
2871 | } | |
2872 | ||
f73fabfd | 2873 | return LTTNG_OK; |
00e2e675 DG |
2874 | |
2875 | error: | |
2f77fc4b DG |
2876 | free(lus); |
2877 | session->ust_session = NULL; | |
00e2e675 DG |
2878 | return ret; |
2879 | } | |
2880 | ||
2881 | /* | |
2f77fc4b | 2882 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2883 | */ |
2f77fc4b | 2884 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2885 | { |
2886 | int ret; | |
a4b92340 | 2887 | |
2f77fc4b | 2888 | DBG("Creating kernel session"); |
00e2e675 | 2889 | |
2f77fc4b DG |
2890 | ret = kernel_create_session(session, kernel_tracer_fd); |
2891 | if (ret < 0) { | |
f73fabfd | 2892 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2893 | goto error; |
2894 | } | |
2895 | ||
2f77fc4b DG |
2896 | /* Code flow safety */ |
2897 | assert(session->kernel_session); | |
2898 | ||
2899 | /* Copy session output to the newly created Kernel session */ | |
2900 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2901 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2902 | goto error; |
2903 | } | |
2904 | ||
2f77fc4b DG |
2905 | session->kernel_session->uid = session->uid; |
2906 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2907 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2908 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2909 | |
f73fabfd | 2910 | return LTTNG_OK; |
00e2e675 | 2911 | |
2f77fc4b DG |
2912 | error: |
2913 | trace_kernel_destroy_session(session->kernel_session); | |
2914 | session->kernel_session = NULL; | |
2915 | return ret; | |
2916 | } | |
00e2e675 | 2917 | |
2f77fc4b DG |
2918 | /* |
2919 | * Count number of session permitted by uid/gid. | |
2920 | */ | |
2921 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2922 | { | |
2923 | unsigned int i = 0; | |
2924 | struct ltt_session *session; | |
07424f16 | 2925 | |
2f77fc4b DG |
2926 | DBG("Counting number of available session for UID %d GID %d", |
2927 | uid, gid); | |
2928 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2929 | /* |
2f77fc4b | 2930 | * Only list the sessions the user can control. |
00e2e675 | 2931 | */ |
2f77fc4b DG |
2932 | if (!session_access_ok(session, uid, gid)) { |
2933 | continue; | |
2934 | } | |
2935 | i++; | |
a4b92340 | 2936 | } |
2f77fc4b | 2937 | return i; |
00e2e675 DG |
2938 | } |
2939 | ||
5c408ad8 JD |
2940 | /* |
2941 | * Check if the current kernel tracer supports the session rotation feature. | |
2942 | * Return 1 if it does, 0 otherwise. | |
2943 | */ | |
2944 | static int check_rotate_compatible(void) | |
2945 | { | |
2946 | int ret = 1; | |
2947 | ||
2948 | if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) { | |
2949 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
2950 | ret = 0; | |
2951 | } | |
2952 | ||
2953 | return ret; | |
2954 | } | |
2955 | ||
54d01ffb DG |
2956 | /* |
2957 | * Process the command requested by the lttng client within the command | |
2958 | * context structure. This function make sure that the return structure (llm) | |
2959 | * is set and ready for transmission before returning. | |
2960 | * | |
2961 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2962 | * |
2963 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2964 | * |
2965 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2966 | */ |
53a80697 MD |
2967 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2968 | int *sock_error) | |
54d01ffb | 2969 | { |
f73fabfd | 2970 | int ret = LTTNG_OK; |
44d3bd01 | 2971 | int need_tracing_session = 1; |
2e09ba09 | 2972 | int need_domain; |
54d01ffb DG |
2973 | |
2974 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2975 | ||
3745d315 MD |
2976 | assert(!rcu_read_ongoing()); |
2977 | ||
53a80697 MD |
2978 | *sock_error = 0; |
2979 | ||
2e09ba09 MD |
2980 | switch (cmd_ctx->lsm->cmd_type) { |
2981 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2982 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2983 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2984 | case LTTNG_DESTROY_SESSION: |
2985 | case LTTNG_LIST_SESSIONS: | |
2986 | case LTTNG_LIST_DOMAINS: | |
2987 | case LTTNG_START_TRACE: | |
2988 | case LTTNG_STOP_TRACE: | |
6d805429 | 2989 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2990 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2991 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2992 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2993 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2994 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2995 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 2996 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 2997 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
2998 | case LTTNG_REGISTER_TRIGGER: |
2999 | case LTTNG_UNREGISTER_TRIGGER: | |
5c408ad8 | 3000 | case LTTNG_ROTATE_SESSION: |
d68c9a04 JD |
3001 | case LTTNG_ROTATION_GET_INFO: |
3002 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: | |
259c2674 | 3003 | case LTTNG_ROTATION_SET_SCHEDULE: |
329f3443 JD |
3004 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
3005 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
2e09ba09 | 3006 | need_domain = 0; |
3aace903 | 3007 | break; |
2e09ba09 MD |
3008 | default: |
3009 | need_domain = 1; | |
3010 | } | |
3011 | ||
e6142f2e | 3012 | if (config.no_kernel && need_domain |
2e09ba09 | 3013 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 3014 | if (!is_root) { |
f73fabfd | 3015 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3016 | } else { |
f73fabfd | 3017 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3018 | } |
4fba7219 DG |
3019 | goto error; |
3020 | } | |
3021 | ||
8d3113b2 DG |
3022 | /* Deny register consumer if we already have a spawned consumer. */ |
3023 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3024 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3025 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3026 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3027 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3028 | goto error; |
3029 | } | |
3030 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3031 | } | |
3032 | ||
54d01ffb DG |
3033 | /* |
3034 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3035 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3036 | * command. |
3037 | */ | |
3038 | switch(cmd_ctx->lsm->cmd_type) { | |
3039 | case LTTNG_LIST_SESSIONS: | |
3040 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3041 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3042 | case LTTNG_LIST_DOMAINS: |
3043 | case LTTNG_LIST_CHANNELS: | |
3044 | case LTTNG_LIST_EVENTS: | |
834978fd | 3045 | case LTTNG_LIST_SYSCALLS: |
a24248b3 | 3046 | case LTTNG_LIST_TRACKER_IDS: |
5cd0780d | 3047 | case LTTNG_DATA_PENDING: |
5c408ad8 | 3048 | case LTTNG_ROTATE_SESSION: |
d68c9a04 | 3049 | case LTTNG_ROTATION_GET_INFO: |
329f3443 JD |
3050 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
3051 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
54d01ffb DG |
3052 | break; |
3053 | default: | |
3054 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3055 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3056 | if (ret < 0) { |
3057 | /* This label does not try to unlock the session */ | |
3058 | goto init_setup_error; | |
3059 | } | |
3060 | } | |
3061 | ||
3062 | /* Commands that DO NOT need a session. */ | |
3063 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3064 | case LTTNG_CREATE_SESSION: |
27babd3a | 3065 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3066 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3067 | case LTTNG_LIST_SESSIONS: |
3068 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3069 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3070 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3071 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3072 | case LTTNG_REGISTER_TRIGGER: |
3073 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3074 | need_tracing_session = 0; |
54d01ffb DG |
3075 | break; |
3076 | default: | |
3077 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3078 | /* |
3079 | * We keep the session list lock across _all_ commands | |
3080 | * for now, because the per-session lock does not | |
3081 | * handle teardown properly. | |
3082 | */ | |
74babd95 | 3083 | session_lock_list(); |
54d01ffb DG |
3084 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3085 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3086 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3087 | goto error; |
3088 | } else { | |
3089 | /* Acquire lock for the session */ | |
3090 | session_lock(cmd_ctx->session); | |
3091 | } | |
3092 | break; | |
3093 | } | |
b389abbe | 3094 | |
5f3ecf22 DG |
3095 | /* |
3096 | * Commands that need a valid session but should NOT create one if none | |
3097 | * exists. Instead of creating one and destroying it when the command is | |
3098 | * handled, process that right before so we save some round trip in useless | |
3099 | * code path. | |
3100 | */ | |
3101 | switch (cmd_ctx->lsm->cmd_type) { | |
3102 | case LTTNG_DISABLE_CHANNEL: | |
3103 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3104 | switch (cmd_ctx->lsm->domain.type) { |
3105 | case LTTNG_DOMAIN_KERNEL: | |
3106 | if (!cmd_ctx->session->kernel_session) { | |
3107 | ret = LTTNG_ERR_NO_CHANNEL; | |
3108 | goto error; | |
3109 | } | |
3110 | break; | |
3111 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3112 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3113 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3114 | case LTTNG_DOMAIN_UST: |
3115 | if (!cmd_ctx->session->ust_session) { | |
3116 | ret = LTTNG_ERR_NO_CHANNEL; | |
3117 | goto error; | |
3118 | } | |
3119 | break; | |
3120 | default: | |
3121 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3122 | goto error; | |
3123 | } | |
3124 | default: | |
3125 | break; | |
3126 | } | |
3127 | ||
2e09ba09 MD |
3128 | if (!need_domain) { |
3129 | goto skip_domain; | |
3130 | } | |
a4b92340 | 3131 | |
54d01ffb DG |
3132 | /* |
3133 | * Check domain type for specific "pre-action". | |
3134 | */ | |
3135 | switch (cmd_ctx->lsm->domain.type) { | |
3136 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3137 | if (!is_root) { |
f73fabfd | 3138 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3139 | goto error; |
3140 | } | |
3141 | ||
54d01ffb | 3142 | /* Kernel tracer check */ |
a4b35e07 | 3143 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3144 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3145 | ret = init_kernel_tracer(); |
3146 | if (ret != 0) { | |
54d01ffb DG |
3147 | goto error; |
3148 | } | |
3149 | } | |
5eb91c98 | 3150 | |
5c827ce0 DG |
3151 | /* Consumer is in an ERROR state. Report back to client */ |
3152 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3153 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3154 | goto error; |
3155 | } | |
3156 | ||
54d01ffb | 3157 | /* Need a session for kernel command */ |
44d3bd01 | 3158 | if (need_tracing_session) { |
54d01ffb | 3159 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3160 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3161 | if (ret < 0) { |
f73fabfd | 3162 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3163 | goto error; |
3164 | } | |
b389abbe | 3165 | } |
7d29a247 | 3166 | |
54d01ffb | 3167 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3168 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3169 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3170 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3171 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3172 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3173 | if (ret < 0) { |
f73fabfd | 3174 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3175 | goto error; |
950131af | 3176 | } |
5c827ce0 | 3177 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3178 | } else { |
3179 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3180 | } |
173af62f | 3181 | |
a4b92340 DG |
3182 | /* |
3183 | * The consumer was just spawned so we need to add the socket to | |
3184 | * the consumer output of the session if exist. | |
3185 | */ | |
3186 | ret = consumer_create_socket(&kconsumer_data, | |
3187 | cmd_ctx->session->kernel_session->consumer); | |
3188 | if (ret < 0) { | |
3189 | goto error; | |
173af62f | 3190 | } |
0d0c377a | 3191 | } |
5c827ce0 | 3192 | |
54d01ffb | 3193 | break; |
b9dfb167 | 3194 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3195 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3196 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3197 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3198 | { |
b51ec5b4 MD |
3199 | if (!ust_app_supported()) { |
3200 | ret = LTTNG_ERR_NO_UST; | |
3201 | goto error; | |
3202 | } | |
5c827ce0 DG |
3203 | /* Consumer is in an ERROR state. Report back to client */ |
3204 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3205 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3206 | goto error; |
3207 | } | |
3208 | ||
44d3bd01 | 3209 | if (need_tracing_session) { |
a4b92340 | 3210 | /* Create UST session if none exist. */ |
f6a9efaa | 3211 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3212 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3213 | &cmd_ctx->lsm->domain); |
f73fabfd | 3214 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3215 | goto error; |
3216 | } | |
3217 | } | |
00e2e675 | 3218 | |
7753dea8 MD |
3219 | /* Start the UST consumer daemons */ |
3220 | /* 64-bit */ | |
3221 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3222 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3223 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3224 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3225 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3226 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3227 | if (ret < 0) { |
f73fabfd | 3228 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3229 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3230 | goto error; |
3231 | } | |
48842b30 | 3232 | |
173af62f | 3233 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3234 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3235 | } else { |
7753dea8 MD |
3236 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3237 | } | |
173af62f DG |
3238 | |
3239 | /* | |
3240 | * Setup socket for consumer 64 bit. No need for atomic access | |
3241 | * since it was set above and can ONLY be set in this thread. | |
3242 | */ | |
a4b92340 DG |
3243 | ret = consumer_create_socket(&ustconsumer64_data, |
3244 | cmd_ctx->session->ust_session->consumer); | |
3245 | if (ret < 0) { | |
3246 | goto error; | |
173af62f DG |
3247 | } |
3248 | ||
7753dea8 | 3249 | /* 32-bit */ |
385b881b | 3250 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3251 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3252 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3253 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3254 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3255 | ret = start_consumerd(&ustconsumer32_data); | |
3256 | if (ret < 0) { | |
f73fabfd | 3257 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3258 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3259 | goto error; |
3260 | } | |
5c827ce0 | 3261 | |
173af62f | 3262 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3263 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3264 | } else { |
3265 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3266 | } |
173af62f DG |
3267 | |
3268 | /* | |
3269 | * Setup socket for consumer 64 bit. No need for atomic access | |
3270 | * since it was set above and can ONLY be set in this thread. | |
3271 | */ | |
a4b92340 DG |
3272 | ret = consumer_create_socket(&ustconsumer32_data, |
3273 | cmd_ctx->session->ust_session->consumer); | |
3274 | if (ret < 0) { | |
3275 | goto error; | |
173af62f | 3276 | } |
44d3bd01 DG |
3277 | } |
3278 | break; | |
48842b30 | 3279 | } |
54d01ffb | 3280 | default: |
54d01ffb DG |
3281 | break; |
3282 | } | |
2e09ba09 | 3283 | skip_domain: |
33a2b854 | 3284 | |
5c827ce0 DG |
3285 | /* Validate consumer daemon state when start/stop trace command */ |
3286 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3287 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3288 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3289 | case LTTNG_DOMAIN_NONE: |
3290 | break; | |
b9dfb167 | 3291 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3292 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3293 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3294 | case LTTNG_DOMAIN_UST: |
3295 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3296 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3297 | goto error; |
3298 | } | |
3299 | break; | |
3300 | case LTTNG_DOMAIN_KERNEL: | |
3301 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3302 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3303 | goto error; |
3304 | } | |
3305 | break; | |
825535cc JG |
3306 | default: |
3307 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3308 | goto error; | |
5c827ce0 DG |
3309 | } |
3310 | } | |
3311 | ||
8e0af1b4 MD |
3312 | /* |
3313 | * Check that the UID or GID match that of the tracing session. | |
3314 | * The root user can interact with all sessions. | |
3315 | */ | |
3316 | if (need_tracing_session) { | |
3317 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3318 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3319 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3320 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3321 | goto error; |
3322 | } | |
3323 | } | |
3324 | ||
ffe60014 DG |
3325 | /* |
3326 | * Send relayd information to consumer as soon as we have a domain and a | |
3327 | * session defined. | |
3328 | */ | |
3329 | if (cmd_ctx->session && need_domain) { | |
3330 | /* | |
3331 | * Setup relayd if not done yet. If the relayd information was already | |
3332 | * sent to the consumer, this call will gracefully return. | |
3333 | */ | |
3334 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3335 | if (ret != LTTNG_OK) { | |
3336 | goto error; | |
3337 | } | |
3338 | } | |
3339 | ||
54d01ffb DG |
3340 | /* Process by command type */ |
3341 | switch (cmd_ctx->lsm->cmd_type) { | |
3342 | case LTTNG_ADD_CONTEXT: | |
3343 | { | |
2001793c JG |
3344 | /* |
3345 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3346 | * payload if the context being added is an application context. | |
3347 | */ | |
3348 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3349 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3350 | char *provider_name = NULL, *context_name = NULL; | |
3351 | size_t provider_name_len = | |
3352 | cmd_ctx->lsm->u.context.provider_name_len; | |
3353 | size_t context_name_len = | |
3354 | cmd_ctx->lsm->u.context.context_name_len; | |
3355 | ||
3356 | if (provider_name_len == 0 || context_name_len == 0) { | |
3357 | /* | |
3358 | * Application provider and context names MUST | |
3359 | * be provided. | |
3360 | */ | |
3361 | ret = -LTTNG_ERR_INVALID; | |
3362 | goto error; | |
3363 | } | |
3364 | ||
3365 | provider_name = zmalloc(provider_name_len + 1); | |
3366 | if (!provider_name) { | |
3367 | ret = -LTTNG_ERR_NOMEM; | |
3368 | goto error; | |
3369 | } | |
e0f4d107 JG |
3370 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3371 | provider_name; | |
2001793c JG |
3372 | |
3373 | context_name = zmalloc(context_name_len + 1); | |
3374 | if (!context_name) { | |
3375 | ret = -LTTNG_ERR_NOMEM; | |
3376 | goto error_add_context; | |
3377 | } | |
e0f4d107 JG |
3378 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3379 | context_name; | |
2001793c JG |
3380 | |
3381 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3382 | provider_name_len); | |
3383 | if (ret < 0) { | |
3384 | goto error_add_context; | |
3385 | } | |
3386 | ||
3387 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3388 | context_name_len); | |
3389 | if (ret < 0) { | |
3390 | goto error_add_context; | |
3391 | } | |
2001793c JG |
3392 | } |
3393 | ||
3394 | /* | |
3395 | * cmd_add_context assumes ownership of the provider and context | |
3396 | * names. | |
3397 | */ | |
3398 | ret = cmd_add_context(cmd_ctx->session, | |
3399 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3400 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3401 | &cmd_ctx->lsm->u.context.ctx, |
3402 | kernel_poll_pipe[1]); | |
3403 | ||
3404 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3405 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3406 | error_add_context: | |
3407 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3408 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3409 | if (ret < 0) { | |
3410 | goto error; | |
3411 | } | |
54d01ffb DG |
3412 | break; |
3413 | } | |
3414 | case LTTNG_DISABLE_CHANNEL: | |
3415 | { | |
3416 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3417 | cmd_ctx->lsm->u.disable.channel_name); | |
3418 | break; | |
3419 | } | |
3420 | case LTTNG_DISABLE_EVENT: | |
3421 | { | |
47b7e2f9 JG |
3422 | |
3423 | /* | |
3424 | * FIXME: handle filter; for now we just receive the filter's | |
3425 | * bytecode along with the filter expression which are sent by | |
3426 | * liblttng-ctl and discard them. | |
3427 | * | |
3428 | * This fixes an issue where the client may block while sending | |
3429 | * the filter payload and encounter an error because the session | |
3430 | * daemon closes the socket without ever handling this data. | |
3431 | */ | |
3432 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3433 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3434 | ||
3435 | if (count) { | |
3436 | char data[LTTNG_FILTER_MAX_LEN]; | |
3437 | ||
3438 | DBG("Discarding disable event command payload of size %zu", count); | |
3439 | while (count) { | |
3440 | ret = lttcomm_recv_unix_sock(sock, data, | |
3441 | count > sizeof(data) ? sizeof(data) : count); | |
3442 | if (ret < 0) { | |
3443 | goto error; | |
3444 | } | |
3445 | ||
3446 | count -= (size_t) ret; | |
3447 | } | |
3448 | } | |
6e911cad | 3449 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3450 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3451 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3452 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3453 | break; |
3454 | } | |
54d01ffb DG |
3455 | case LTTNG_ENABLE_CHANNEL: |
3456 | { | |
b3530820 JG |
3457 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3458 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3459 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3460 | &cmd_ctx->lsm->u.channel.chan, |
3461 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3462 | break; |
3463 | } | |
a24248b3 | 3464 | case LTTNG_TRACK_ID: |
ccf10263 | 3465 | { |
a24248b3 MD |
3466 | struct lttng_tracker_id id; |
3467 | ||
3468 | memset(&id, 0, sizeof(id)); | |
3469 | id.type = cmd_ctx->lsm->u.id_tracker.id_type; | |
3470 | switch (id.type) { | |
3471 | case LTTNG_ID_ALL: | |
3472 | break; | |
3473 | case LTTNG_ID_VALUE: | |
3474 | id.value = cmd_ctx->lsm->u.id_tracker.u.value; | |
3475 | break; | |
3476 | case LTTNG_ID_STRING: | |
3477 | { | |
3478 | size_t var_len = cmd_ctx->lsm->u.id_tracker.u.var_len; | |
3479 | ||
3480 | id.string = zmalloc(var_len); | |
3481 | if (!id.string) { | |
3482 | ret = LTTNG_ERR_NOMEM; | |
3483 | goto error; | |
3484 | } | |
3485 | DBG("Receiving var len tracker id string from client."); | |
3486 | ret = lttcomm_recv_unix_sock(sock, id.string, var_len); | |
3487 | if (ret <= 0) { | |
3488 | DBG("Nothing received."); | |
3489 | *sock_error = 1; | |
3490 | free(id.string); | |
3491 | ret = LTTNG_ERR_INVALID; | |
3492 | goto error; | |
3493 | } | |
3494 | if (strnlen(id.string, var_len) != var_len - 1) { | |
3495 | DBG("Corrupted string."); | |
3496 | free(id.string); | |
3497 | ret = LTTNG_ERR_INVALID; | |
3498 | goto error; | |
3499 | } | |
3500 | break; | |
3501 | } | |
3502 | default: | |
3503 | ret = LTTNG_ERR_INVALID; | |
3504 | goto error; | |
3505 | } | |
3506 | ret = cmd_track_id(cmd_ctx->session, | |
3507 | cmd_ctx->lsm->u.id_tracker.tracker_type, | |
ccf10263 | 3508 | cmd_ctx->lsm->domain.type, |
a24248b3 | 3509 | &id); |
8c229c78 | 3510 | free(id.string); |
ccf10263 MD |
3511 | break; |
3512 | } | |
a24248b3 | 3513 | case LTTNG_UNTRACK_ID: |
ccf10263 | 3514 | { |
a24248b3 MD |
3515 | struct lttng_tracker_id id; |
3516 | ||
3517 | memset(&id, 0, sizeof(id)); | |
3518 | id.type = cmd_ctx->lsm->u.id_tracker.id_type; | |
3519 | switch (id.type) { | |
3520 | case LTTNG_ID_ALL: | |
3521 | break; | |
3522 | case LTTNG_ID_VALUE: | |
3523 | id.value = cmd_ctx->lsm->u.id_tracker.u.value; | |
3524 | break; | |
3525 | case LTTNG_ID_STRING: | |
3526 | { | |
3527 | size_t var_len = cmd_ctx->lsm->u.id_tracker.u.var_len; | |
3528 | ||
3529 | id.string = zmalloc(var_len); | |
3530 | if (!id.string) { | |
3531 | ret = LTTNG_ERR_NOMEM; | |
3532 | goto error; | |
3533 | } | |
3534 | DBG("Receiving var len tracker id string from client."); | |
3535 | ret = lttcomm_recv_unix_sock(sock, id.string, var_len); | |
3536 | if (ret <= 0) { | |
3537 | DBG("Nothing received."); | |
3538 | *sock_error = 1; | |
3539 | free(id.string); | |
3540 | ret = LTTNG_ERR_INVALID; | |
3541 | goto error; | |
3542 | } | |
3543 | if (strnlen(id.string, var_len) != var_len - 1) { | |
3544 | DBG("Corrupted string."); | |
3545 | free(id.string); | |
3546 | ret = LTTNG_ERR_INVALID; | |
3547 | goto error; | |
3548 | } | |
3549 | break; | |
3550 | } | |
3551 | default: | |
3552 | ret = LTTNG_ERR_INVALID; | |
3553 | goto error; | |
3554 | } | |
3555 | ret = cmd_untrack_id(cmd_ctx->session, | |
3556 | cmd_ctx->lsm->u.id_tracker.tracker_type, | |
ccf10263 | 3557 | cmd_ctx->lsm->domain.type, |
a24248b3 | 3558 | &id); |
8c229c78 | 3559 | free(id.string); |
ccf10263 MD |
3560 | break; |
3561 | } | |
54d01ffb DG |
3562 | case LTTNG_ENABLE_EVENT: |
3563 | { | |
882ef835 JI |
3564 | struct lttng_event_exclusion *exclusion = NULL; |
3565 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3566 | char *filter_expression = NULL; |
882ef835 | 3567 | |
67676bd8 DG |
3568 | /* Handle exclusion events and receive it from the client. */ |
3569 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3570 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3571 | ||
3572 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3573 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3574 | if (!exclusion) { | |
3575 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3576 | goto error; | |
882ef835 | 3577 | } |
882ef835 | 3578 | |
67676bd8 DG |
3579 | DBG("Receiving var len exclusion event list from client ..."); |
3580 | exclusion->count = count; | |
3581 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3582 | count * LTTNG_SYMBOL_NAME_LEN); | |
3583 | if (ret <= 0) { | |
3584 | DBG("Nothing recv() from client var len data... continuing"); | |
3585 | *sock_error = 1; | |
3586 | free(exclusion); | |
3587 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3588 | goto error; | |
3589 | } | |
3590 | } | |
3591 | ||
6b453b5e JG |
3592 | /* Get filter expression from client. */ |
3593 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3594 | size_t expression_len = | |
3595 | cmd_ctx->lsm->u.enable.expression_len; | |
3596 | ||
3597 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3598 | ret = LTTNG_ERR_FILTER_INVAL; | |
3599 | free(exclusion); | |
3600 | goto error; | |
3601 | } | |
3602 | ||
3603 | filter_expression = zmalloc(expression_len); | |
3604 | if (!filter_expression) { | |
3605 | free(exclusion); | |
3606 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3607 | goto error; | |
3608 | } | |
3609 | ||
3610 | /* Receive var. len. data */ | |
3611 | DBG("Receiving var len filter's expression from client ..."); | |
3612 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3613 | expression_len); | |
3614 | if (ret <= 0) { | |
3615 | DBG("Nothing recv() from client car len data... continuing"); | |
3616 | *sock_error = 1; | |
3617 | free(filter_expression); | |
3618 | free(exclusion); | |
3619 | ret = LTTNG_ERR_FILTER_INVAL; | |
3620 | goto error; | |
3621 | } | |
3622 | } | |
3623 | ||
67676bd8 DG |
3624 | /* Handle filter and get bytecode from client. */ |
3625 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3626 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3627 | ||
3628 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3629 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3630 | free(filter_expression); |
67676bd8 DG |
3631 | free(exclusion); |
3632 | goto error; | |
3633 | } | |
3634 | ||
3635 | bytecode = zmalloc(bytecode_len); | |
3636 | if (!bytecode) { | |
49d21f93 | 3637 | free(filter_expression); |
67676bd8 DG |
3638 | free(exclusion); |
3639 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3640 | goto error; | |
882ef835 JI |
3641 | } |
3642 | ||
67676bd8 DG |
3643 | /* Receive var. len. data */ |
3644 | DBG("Receiving var len filter's bytecode from client ..."); | |
3645 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3646 | if (ret <= 0) { | |
3647 | DBG("Nothing recv() from client car len data... continuing"); | |
3648 | *sock_error = 1; | |
49d21f93 | 3649 | free(filter_expression); |
67676bd8 DG |
3650 | free(bytecode); |
3651 | free(exclusion); | |
3652 | ret = LTTNG_ERR_FILTER_INVAL; | |
3653 | goto error; | |
3654 | } | |
3655 | ||
3656 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3657 | free(filter_expression); |
67676bd8 DG |
3658 | free(bytecode); |
3659 | free(exclusion); | |
3660 | ret = LTTNG_ERR_FILTER_INVAL; | |
3661 | goto error; | |
3662 | } | |
882ef835 | 3663 | } |
67676bd8 DG |
3664 | |
3665 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3666 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3667 | &cmd_ctx->lsm->u.enable.event, |
3668 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3669 | kernel_poll_pipe[1]); |
54d01ffb DG |
3670 | break; |
3671 | } | |
052da939 | 3672 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3673 | { |
9f19cc17 | 3674 | struct lttng_event *events; |
54d01ffb | 3675 | ssize_t nb_events; |
052da939 | 3676 | |
0845bbfa | 3677 | session_lock_list(); |
54d01ffb | 3678 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3679 | session_unlock_list(); |
54d01ffb | 3680 | if (nb_events < 0) { |
f73fabfd | 3681 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3682 | ret = -nb_events; |
3683 | goto error; | |
2ef84c95 DG |
3684 | } |
3685 | ||
3686 | /* | |
3687 | * Setup lttng message with payload size set to the event list size in | |
3688 | * bytes and then copy list into the llm payload. | |
3689 | */ | |
6e10c9b9 PP |
3690 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3691 | sizeof(struct lttng_event) * nb_events); | |
3692 | free(events); | |
3693 | ||
2ef84c95 DG |
3694 | if (ret < 0) { |
3695 | goto setup_error; | |
3696 | } | |
3697 | ||
f73fabfd | 3698 | ret = LTTNG_OK; |
2ef84c95 DG |
3699 | break; |
3700 | } | |
f37d259d MD |
3701 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3702 | { | |
3703 | struct lttng_event_field *fields; | |
3704 | ssize_t nb_fields; | |
3705 | ||
0845bbfa | 3706 | session_lock_list(); |
a4b92340 DG |
3707 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3708 | &fields); | |
0845bbfa | 3709 | session_unlock_list(); |
f37d259d | 3710 | if (nb_fields < 0) { |
f73fabfd | 3711 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3712 | ret = -nb_fields; |
3713 | goto error; | |
3714 | } | |
3715 | ||
3716 | /* | |
3717 | * Setup lttng message with payload size set to the event list size in | |
3718 | * bytes and then copy list into the llm payload. | |
3719 | */ | |
6e10c9b9 | 3720 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3721 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3722 | free(fields); |
3723 | ||
f37d259d | 3724 | if (ret < 0) { |
f37d259d MD |
3725 | goto setup_error; |
3726 | } | |
3727 | ||
f73fabfd | 3728 | ret = LTTNG_OK; |
f37d259d MD |
3729 | break; |
3730 | } | |
834978fd DG |
3731 | case LTTNG_LIST_SYSCALLS: |
3732 | { | |
3733 | struct lttng_event *events; | |
3734 | ssize_t nb_events; | |
3735 | ||
3736 | nb_events = cmd_list_syscalls(&events); | |
3737 | if (nb_events < 0) { | |
3738 | /* Return value is a negative lttng_error_code. */ | |
3739 | ret = -nb_events; | |
3740 | goto error; | |
3741 | } | |
3742 | ||
3743 | /* | |
3744 | * Setup lttng message with payload size set to the event list size in | |
3745 | * bytes and then copy list into the llm payload. | |
3746 | */ | |
6e10c9b9 PP |
3747 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3748 | sizeof(struct lttng_event) * nb_events); | |
3749 | free(events); | |
3750 | ||
834978fd | 3751 | if (ret < 0) { |
834978fd DG |
3752 | goto setup_error; |
3753 | } | |
3754 | ||
834978fd DG |
3755 | ret = LTTNG_OK; |
3756 | break; | |
3757 | } | |
a24248b3 | 3758 | case LTTNG_LIST_TRACKER_IDS: |
a5dfbb9d | 3759 | { |
a24248b3 MD |
3760 | struct lttcomm_tracker_command_header cmd_header; |
3761 | struct lttng_tracker_id *ids = NULL; | |
3762 | ssize_t nr_ids, i; | |
3763 | struct lttng_dynamic_buffer buf; | |
3764 | ||
3765 | nr_ids = cmd_list_tracker_ids(cmd_ctx->lsm->u.id_tracker.tracker_type, | |
3766 | cmd_ctx->session, | |
3767 | cmd_ctx->lsm->domain.type, &ids); | |
3768 | if (nr_ids < 0) { | |
a5dfbb9d | 3769 | /* Return value is a negative lttng_error_code. */ |
a24248b3 | 3770 | ret = -nr_ids; |
a5dfbb9d MD |
3771 | goto error; |
3772 | } | |
3773 | ||
a24248b3 MD |
3774 | lttng_dynamic_buffer_init(&buf); |
3775 | for (i = 0; i < nr_ids; i++) { | |
3776 | struct lttng_tracker_id *id = &ids[i]; | |
3777 | struct lttcomm_tracker_id_header id_hdr; | |
3778 | size_t var_data_len = 0; | |
3779 | ||
3780 | memset(&id_hdr, 0, sizeof(id_hdr)); | |
3781 | id_hdr.type = id->type; | |
3782 | switch (id->type) { | |
3783 | case LTTNG_ID_ALL: | |
3784 | break; | |
3785 | case LTTNG_ID_VALUE: | |
3786 | id_hdr.u.value = id->value; | |
3787 | break; | |
3788 | case LTTNG_ID_STRING: | |
3789 | id_hdr.u.var_data_len = var_data_len = strlen(id->string) + 1; | |
3790 | break; | |
3791 | default: | |
3792 | ret = LTTNG_ERR_INVALID; | |
3793 | goto error; | |
3794 | } | |
3795 | ret = lttng_dynamic_buffer_append(&buf, &id_hdr, sizeof(id_hdr)); | |
3796 | if (ret) { | |
3797 | ret = LTTNG_ERR_NOMEM; | |
3798 | goto error; | |
3799 | } | |
3800 | ret = lttng_dynamic_buffer_append(&buf, id->string, var_data_len); | |
3801 | if (ret) { | |
3802 | ret = LTTNG_ERR_NOMEM; | |
3803 | goto error; | |
3804 | } | |
8c229c78 | 3805 | free(id->string); |
a24248b3 | 3806 | } |
6e10c9b9 | 3807 | |
a24248b3 MD |
3808 | cmd_header.nb_tracker_id = nr_ids; |
3809 | ret = setup_lttng_msg(cmd_ctx, buf.data, buf.size, &cmd_header, | |
3810 | sizeof(cmd_header)); | |
3811 | free(ids); | |
3812 | lttng_dynamic_buffer_reset(&buf); | |
a5dfbb9d | 3813 | if (ret < 0) { |
a5dfbb9d MD |
3814 | goto setup_error; |
3815 | } | |
3816 | ||
a5dfbb9d MD |
3817 | ret = LTTNG_OK; |
3818 | break; | |
3819 | } | |
00e2e675 DG |
3820 | case LTTNG_SET_CONSUMER_URI: |
3821 | { | |
a4b92340 DG |
3822 | size_t nb_uri, len; |
3823 | struct lttng_uri *uris; | |
3824 | ||
3825 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3826 | len = nb_uri * sizeof(struct lttng_uri); | |
3827 | ||
3828 | if (nb_uri == 0) { | |
f73fabfd | 3829 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3830 | goto error; |
3831 | } | |
3832 | ||
3833 | uris = zmalloc(len); | |
3834 | if (uris == NULL) { | |
f73fabfd | 3835 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3836 | goto error; |
3837 | } | |
3838 | ||
3839 | /* Receive variable len data */ | |
77c7c900 | 3840 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3841 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3842 | if (ret <= 0) { | |
3843 | DBG("No URIs received from client... continuing"); | |
3844 | *sock_error = 1; | |
f73fabfd | 3845 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3846 | free(uris); |
a4b92340 DG |
3847 | goto error; |
3848 | } | |
3849 | ||
bda32d56 JG |
3850 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3851 | free(uris); | |
f73fabfd | 3852 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3853 | goto error; |
3854 | } | |
3855 | ||
b1d41407 | 3856 | |
00e2e675 DG |
3857 | break; |
3858 | } | |
f3ed775e | 3859 | case LTTNG_START_TRACE: |
8c0faa1d | 3860 | { |
259c2674 JD |
3861 | /* |
3862 | * On the first start, if we have a kernel session and we have | |
3863 | * enabled time or size-based rotations, we have to make sure | |
3864 | * the kernel tracer supports it. | |
3865 | */ | |
3866 | if (!cmd_ctx->session->has_been_started && \ | |
3867 | cmd_ctx->session->kernel_session && \ | |
3868 | (cmd_ctx->session->rotate_timer_period || \ | |
3869 | cmd_ctx->session->rotate_size) && \ | |
3870 | !check_rotate_compatible()) { | |
3871 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
3872 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
3873 | goto error; | |
3874 | } | |
54d01ffb | 3875 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3876 | break; |
3877 | } | |
f3ed775e | 3878 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3879 | { |
54d01ffb | 3880 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3881 | break; |
3882 | } | |
5e16da05 MD |
3883 | case LTTNG_CREATE_SESSION: |
3884 | { | |
a4b92340 DG |
3885 | size_t nb_uri, len; |
3886 | struct lttng_uri *uris = NULL; | |
3887 | ||
3888 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3889 | len = nb_uri * sizeof(struct lttng_uri); | |
3890 | ||
3891 | if (nb_uri > 0) { | |
3892 | uris = zmalloc(len); | |
3893 | if (uris == NULL) { | |
f73fabfd | 3894 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3895 | goto error; |
3896 | } | |
3897 | ||
3898 | /* Receive variable len data */ | |
77c7c900 | 3899 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3900 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3901 | if (ret <= 0) { | |
3902 | DBG("No URIs received from client... continuing"); | |
3903 | *sock_error = 1; | |
f73fabfd | 3904 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3905 | free(uris); |
a4b92340 DG |
3906 | goto error; |
3907 | } | |
3908 | ||
3909 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3910 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3911 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3912 | free(uris); |
a4b92340 DG |
3913 | goto error; |
3914 | } | |
3915 | } | |
3916 | ||
3917 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3918 | &cmd_ctx->creds, 0); |
a4b92340 | 3919 | |
b1d41407 DG |
3920 | free(uris); |
3921 | ||
00e2e675 DG |
3922 | break; |
3923 | } | |
5e16da05 MD |
3924 | case LTTNG_DESTROY_SESSION: |
3925 | { | |
90936dcf JD |
3926 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1], |
3927 | notification_thread_handle); | |
a4b92340 DG |
3928 | |
3929 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3930 | cmd_ctx->session = NULL; |
5461b305 | 3931 | break; |
5e16da05 | 3932 | } |
9f19cc17 | 3933 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3934 | { |
54d01ffb | 3935 | ssize_t nb_dom; |
fa64dfb4 | 3936 | struct lttng_domain *domains = NULL; |
5461b305 | 3937 | |
54d01ffb DG |
3938 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3939 | if (nb_dom < 0) { | |
f73fabfd | 3940 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3941 | ret = -nb_dom; |
3942 | goto error; | |
ce3d728c | 3943 | } |
520ff687 | 3944 | |
6e10c9b9 PP |
3945 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3946 | nb_dom * sizeof(struct lttng_domain)); | |
3947 | free(domains); | |
3948 | ||
5461b305 DG |
3949 | if (ret < 0) { |
3950 | goto setup_error; | |
520ff687 | 3951 | } |
57167058 | 3952 | |
f73fabfd | 3953 | ret = LTTNG_OK; |
5e16da05 MD |
3954 | break; |
3955 | } | |
9f19cc17 | 3956 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3957 | { |
53e367f9 | 3958 | ssize_t payload_size; |
ade7ce52 | 3959 | struct lttng_channel *channels = NULL; |
54d01ffb | 3960 | |
53e367f9 | 3961 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3962 | cmd_ctx->session, &channels); |
53e367f9 | 3963 | if (payload_size < 0) { |
f73fabfd | 3964 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3965 | ret = -payload_size; |
54d01ffb | 3966 | goto error; |
5461b305 | 3967 | } |
ca95a216 | 3968 | |
6e10c9b9 | 3969 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3970 | payload_size); |
6e10c9b9 PP |
3971 | free(channels); |
3972 | ||
5461b305 DG |
3973 | if (ret < 0) { |
3974 | goto setup_error; | |
3975 | } | |
9f19cc17 | 3976 | |
f73fabfd | 3977 | ret = LTTNG_OK; |
5461b305 | 3978 | break; |
5e16da05 | 3979 | } |
9f19cc17 | 3980 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3981 | { |
b551a063 | 3982 | ssize_t nb_event; |
684d34d2 | 3983 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3984 | struct lttcomm_event_command_header cmd_header; |
3985 | size_t total_size; | |
3986 | ||
b2d66287 | 3987 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3988 | /* Extended infos are included at the end of events */ |
3989 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3990 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3991 | &events, &total_size); | |
9f19cc17 | 3992 | |
54d01ffb | 3993 | if (nb_event < 0) { |
f73fabfd | 3994 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3995 | ret = -nb_event; |
3996 | goto error; | |
5461b305 | 3997 | } |
ca95a216 | 3998 | |
b4e3ceb9 PP |
3999 | cmd_header.nb_events = nb_event; |
4000 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
4001 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
4002 | free(events); |
4003 | ||
5461b305 DG |
4004 | if (ret < 0) { |
4005 | goto setup_error; | |
4006 | } | |
9f19cc17 | 4007 | |
f73fabfd | 4008 | ret = LTTNG_OK; |
5461b305 | 4009 | break; |
5e16da05 MD |
4010 | } |
4011 | case LTTNG_LIST_SESSIONS: | |
4012 | { | |
8e0af1b4 | 4013 | unsigned int nr_sessions; |
6e10c9b9 PP |
4014 | void *sessions_payload; |
4015 | size_t payload_len; | |
5461b305 | 4016 | |
8e0af1b4 | 4017 | session_lock_list(); |
730389d9 DG |
4018 | nr_sessions = lttng_sessions_count( |
4019 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
4020 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
4021 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
4022 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 4023 | |
6e10c9b9 | 4024 | if (!sessions_payload) { |
54d01ffb | 4025 | session_unlock_list(); |
6e10c9b9 | 4026 | ret = -ENOMEM; |
5461b305 | 4027 | goto setup_error; |
e065084a | 4028 | } |
5e16da05 | 4029 | |
6e10c9b9 | 4030 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
4031 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
4032 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 4033 | session_unlock_list(); |
5e16da05 | 4034 | |
6e10c9b9 PP |
4035 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
4036 | payload_len); | |
4037 | free(sessions_payload); | |
4038 | ||
4039 | if (ret < 0) { | |
4040 | goto setup_error; | |
4041 | } | |
4042 | ||
f73fabfd | 4043 | ret = LTTNG_OK; |
5e16da05 MD |
4044 | break; |
4045 | } | |
d9800920 DG |
4046 | case LTTNG_REGISTER_CONSUMER: |
4047 | { | |
2f77fc4b DG |
4048 | struct consumer_data *cdata; |
4049 | ||
4050 | switch (cmd_ctx->lsm->domain.type) { | |
4051 | case LTTNG_DOMAIN_KERNEL: | |
4052 | cdata = &kconsumer_data; | |
4053 | break; | |
4054 | default: | |
f73fabfd | 4055 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
4056 | goto error; |
4057 | } | |
4058 | ||
54d01ffb | 4059 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 4060 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
4061 | break; |
4062 | } | |
6d805429 | 4063 | case LTTNG_DATA_PENDING: |
806e2684 | 4064 | { |
f6151c55 | 4065 | int pending_ret; |
6e10c9b9 | 4066 | uint8_t pending_ret_byte; |
f6151c55 JG |
4067 | |
4068 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 4069 | |
f6151c55 JG |
4070 | /* |
4071 | * FIXME | |
4072 | * | |
4073 | * This function may returns 0 or 1 to indicate whether or not | |
4074 | * there is data pending. In case of error, it should return an | |
4075 | * LTTNG_ERR code. However, some code paths may still return | |
4076 | * a nondescript error code, which we handle by returning an | |
4077 | * "unknown" error. | |
4078 | */ | |
4079 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
4080 | /* |
4081 | * ret will be set to LTTNG_OK at the end of | |
4082 | * this function. | |
4083 | */ | |
f6151c55 JG |
4084 | } else if (pending_ret < 0) { |
4085 | ret = LTTNG_ERR_UNK; | |
4086 | goto setup_error; | |
4087 | } else { | |
4088 | ret = pending_ret; | |
4089 | goto setup_error; | |
4090 | } | |
4091 | ||
6e10c9b9 PP |
4092 | pending_ret_byte = (uint8_t) pending_ret; |
4093 | ||
4094 | /* 1 byte to return whether or not data is pending */ | |
4095 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
4096 | &pending_ret_byte, 1); | |
4097 | ||
4098 | if (ret < 0) { | |
4099 | goto setup_error; | |
4100 | } | |
4101 | ||
4102 | ret = LTTNG_OK; | |
806e2684 DG |
4103 | break; |
4104 | } | |
da3c9ec1 DG |
4105 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
4106 | { | |
6dc3064a DG |
4107 | struct lttcomm_lttng_output_id reply; |
4108 | ||
4109 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
4110 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
4111 | if (ret != LTTNG_OK) { | |
4112 | goto error; | |
4113 | } | |
4114 | ||
6e10c9b9 PP |
4115 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
4116 | sizeof(reply)); | |
6dc3064a DG |
4117 | if (ret < 0) { |
4118 | goto setup_error; | |
4119 | } | |
4120 | ||
4121 | /* Copy output list into message payload */ | |
6dc3064a | 4122 | ret = LTTNG_OK; |
da3c9ec1 DG |
4123 | break; |
4124 | } | |
4125 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
4126 | { | |
6dc3064a DG |
4127 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
4128 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
4129 | break; |
4130 | } | |
4131 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4132 | { | |
6dc3064a DG |
4133 | ssize_t nb_output; |
4134 | struct lttng_snapshot_output *outputs = NULL; | |
4135 | ||
4136 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4137 | if (nb_output < 0) { | |
4138 | ret = -nb_output; | |
4139 | goto error; | |
4140 | } | |
4141 | ||
6e10c9b9 PP |
4142 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4143 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4144 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4145 | free(outputs); |
4146 | ||
6dc3064a | 4147 | if (ret < 0) { |
6dc3064a DG |
4148 | goto setup_error; |
4149 | } | |
4150 | ||
6dc3064a | 4151 | ret = LTTNG_OK; |
da3c9ec1 DG |
4152 | break; |
4153 | } | |
4154 | case LTTNG_SNAPSHOT_RECORD: | |
4155 | { | |
6dc3064a DG |
4156 | ret = cmd_snapshot_record(cmd_ctx->session, |
4157 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4158 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4159 | break; |
4160 | } | |
27babd3a DG |
4161 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4162 | { | |
4163 | size_t nb_uri, len; | |
4164 | struct lttng_uri *uris = NULL; | |
4165 | ||
4166 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4167 | len = nb_uri * sizeof(struct lttng_uri); | |
4168 | ||
4169 | if (nb_uri > 0) { | |
4170 | uris = zmalloc(len); | |
4171 | if (uris == NULL) { | |
4172 | ret = LTTNG_ERR_FATAL; | |
4173 | goto error; | |
4174 | } | |
4175 | ||
4176 | /* Receive variable len data */ | |
4177 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4178 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4179 | if (ret <= 0) { | |
4180 | DBG("No URIs received from client... continuing"); | |
4181 | *sock_error = 1; | |
4182 | ret = LTTNG_ERR_SESSION_FAIL; | |
4183 | free(uris); | |
4184 | goto error; | |
4185 | } | |
4186 | ||
4187 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4188 | DBG("Creating session with ONE network URI is a bad call"); | |
4189 | ret = LTTNG_ERR_SESSION_FAIL; | |
4190 | free(uris); | |
4191 | goto error; | |
4192 | } | |
4193 | } | |
4194 | ||
4195 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4196 | nb_uri, &cmd_ctx->creds); | |
4197 | free(uris); | |
4198 | break; | |
4199 | } | |
ecc48a90 JD |
4200 | case LTTNG_CREATE_SESSION_LIVE: |
4201 | { | |
4202 | size_t nb_uri, len; | |
4203 | struct lttng_uri *uris = NULL; | |
4204 | ||
4205 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4206 | len = nb_uri * sizeof(struct lttng_uri); | |
4207 | ||
4208 | if (nb_uri > 0) { | |
4209 | uris = zmalloc(len); | |
4210 | if (uris == NULL) { | |
4211 | ret = LTTNG_ERR_FATAL; | |
4212 | goto error; | |
4213 | } | |
4214 | ||
4215 | /* Receive variable len data */ | |
4216 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4217 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4218 | if (ret <= 0) { | |
4219 | DBG("No URIs received from client... continuing"); | |
4220 | *sock_error = 1; | |
4221 | ret = LTTNG_ERR_SESSION_FAIL; | |
4222 | free(uris); | |
4223 | goto error; | |
4224 | } | |
4225 | ||
4226 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4227 | DBG("Creating session with ONE network URI is a bad call"); | |
4228 | ret = LTTNG_ERR_SESSION_FAIL; | |
4229 | free(uris); | |
4230 | goto error; | |
4231 | } | |
4232 | } | |
4233 | ||
4234 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4235 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4236 | free(uris); | |
4237 | break; | |
4238 | } | |
fb198a11 JG |
4239 | case LTTNG_SAVE_SESSION: |
4240 | { | |
4241 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4242 | &cmd_ctx->creds); | |
4243 | break; | |
4244 | } | |
d7ba1388 MD |
4245 | case LTTNG_SET_SESSION_SHM_PATH: |
4246 | { | |
4247 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4248 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4249 | break; | |
4250 | } | |
eded6438 | 4251 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4252 | { |
eded6438 | 4253 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4254 | break; |
4255 | } | |
c2561365 JD |
4256 | case LTTNG_REGENERATE_STATEDUMP: |
4257 | { | |
4258 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4259 | break; | |
4260 | } | |
b3530820 JG |
4261 | case LTTNG_REGISTER_TRIGGER: |
4262 | { | |
4263 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4264 | notification_thread_handle); | |
4265 | break; | |
4266 | } | |
4267 | case LTTNG_UNREGISTER_TRIGGER: | |
4268 | { | |
4269 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4270 | notification_thread_handle); | |
4271 | break; | |
4272 | } | |
5c408ad8 JD |
4273 | case LTTNG_ROTATE_SESSION: |
4274 | { | |
4275 | struct lttng_rotate_session_return rotate_return; | |
4276 | ||
4277 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
4278 | ||
d68c9a04 | 4279 | memset(&rotate_return, 0, sizeof(rotate_return)); |
5c408ad8 JD |
4280 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { |
4281 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
4282 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4283 | goto error; | |
4284 | } | |
4285 | ||
4286 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return); | |
4287 | if (ret < 0) { | |
4288 | ret = -ret; | |
4289 | goto error; | |
4290 | } | |
4291 | ||
4292 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, | |
4293 | sizeof(rotate_return)); | |
4294 | if (ret < 0) { | |
4295 | ret = -ret; | |
4296 | goto error; | |
4297 | } | |
4298 | ||
4299 | ret = LTTNG_OK; | |
4300 | break; | |
4301 | } | |
d68c9a04 | 4302 | case LTTNG_ROTATION_GET_INFO: |
5c408ad8 | 4303 | { |
d68c9a04 | 4304 | struct lttng_rotation_get_info_return get_info_return; |
5c408ad8 | 4305 | |
d68c9a04 JD |
4306 | memset(&get_info_return, 0, sizeof(get_info_return)); |
4307 | ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return, | |
4308 | cmd_ctx->lsm->u.get_rotation_info.rotation_id); | |
5c408ad8 JD |
4309 | if (ret < 0) { |
4310 | ret = -ret; | |
4311 | goto error; | |
4312 | } | |
4313 | ||
d68c9a04 JD |
4314 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return, |
4315 | sizeof(get_info_return)); | |
5c408ad8 JD |
4316 | if (ret < 0) { |
4317 | ret = -ret; | |
4318 | goto error; | |
4319 | } | |
4320 | ||
4321 | ret = LTTNG_OK; | |
4322 | break; | |
4323 | } | |
d68c9a04 | 4324 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: |
5c408ad8 | 4325 | { |
d68c9a04 | 4326 | struct lttng_session_get_current_output_return output_return; |
5c408ad8 | 4327 | |
d68c9a04 JD |
4328 | memset(&output_return, 0, sizeof(output_return)); |
4329 | ret = cmd_session_get_current_output(cmd_ctx->session, | |
4330 | &output_return); | |
5c408ad8 JD |
4331 | if (ret < 0) { |
4332 | ret = -ret; | |
4333 | goto error; | |
4334 | } | |
4335 | ||
d68c9a04 JD |
4336 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &output_return, |
4337 | sizeof(output_return)); | |
5c408ad8 JD |
4338 | if (ret < 0) { |
4339 | ret = -ret; | |
4340 | goto error; | |
4341 | } | |
4342 | ||
4343 | ret = LTTNG_OK; | |
4344 | break; | |
4345 | } | |
259c2674 JD |
4346 | case LTTNG_ROTATION_SET_SCHEDULE: |
4347 | { | |
4348 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
4349 | DBG("Kernel tracer version does not support session rotations"); | |
4350 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4351 | goto error; | |
4352 | } | |
4353 | ||
4354 | ret = cmd_rotation_set_schedule(cmd_ctx->session, | |
4355 | cmd_ctx->lsm->u.rotate_setup.timer_us, | |
90936dcf JD |
4356 | cmd_ctx->lsm->u.rotate_setup.size, |
4357 | notification_thread_handle); | |
a2026546 | 4358 | if (ret != LTTNG_OK) { |
259c2674 JD |
4359 | goto error; |
4360 | } | |
4361 | ||
259c2674 JD |
4362 | break; |
4363 | } | |
329f3443 JD |
4364 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
4365 | { | |
4366 | struct lttng_rotation_schedule_get_timer_period *get_timer; | |
4367 | ||
4368 | get_timer = zmalloc(sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4369 | if (!get_timer) { | |
4370 | ret = ENOMEM; | |
4371 | goto error; | |
4372 | } | |
4373 | get_timer->rotate_timer = cmd_ctx->session->rotate_timer_period; | |
4374 | ||
4375 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_timer, | |
4376 | sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4377 | free(get_timer); | |
4378 | if (ret < 0) { | |
4379 | ret = -ret; | |
4380 | goto error; | |
4381 | } | |
4382 | ||
4383 | ret = LTTNG_OK; | |
4384 | break; | |
4385 | } | |
4386 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
4387 | { | |
4388 | struct lttng_rotation_schedule_get_size *get_size; | |
4389 | ||
4390 | get_size = zmalloc(sizeof(struct lttng_rotation_schedule_get_size)); | |
4391 | if (!get_size) { | |
4392 | ret = ENOMEM; | |
4393 | goto error; | |
4394 | } | |
4395 | get_size->rotate_size = cmd_ctx->session->rotate_size; | |
4396 | ||
4397 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_size, | |
4398 | sizeof(struct lttng_rotation_schedule_get_size)); | |
4399 | free(get_size); | |
4400 | if (ret < 0) { | |
4401 | ret = -ret; | |
4402 | goto error; | |
4403 | } | |
4404 | ||
4405 | ret = LTTNG_OK; | |
4406 | break; | |
4407 | } | |
5e16da05 | 4408 | default: |
f73fabfd | 4409 | ret = LTTNG_ERR_UND; |
5461b305 | 4410 | break; |
fac6795d DG |
4411 | } |
4412 | ||
5461b305 | 4413 | error: |
5461b305 DG |
4414 | if (cmd_ctx->llm == NULL) { |
4415 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4416 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4417 | goto setup_error; |
4418 | } | |
4419 | } | |
54d01ffb | 4420 | /* Set return code */ |
5461b305 | 4421 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4422 | setup_error: |
b5541356 | 4423 | if (cmd_ctx->session) { |
54d01ffb | 4424 | session_unlock(cmd_ctx->session); |
b5541356 | 4425 | } |
256a5576 MD |
4426 | if (need_tracing_session) { |
4427 | session_unlock_list(); | |
4428 | } | |
54d01ffb | 4429 | init_setup_error: |
3745d315 | 4430 | assert(!rcu_read_ongoing()); |
8028d920 | 4431 | return ret; |
fac6795d DG |
4432 | } |
4433 | ||
44a5e5eb DG |
4434 | /* |
4435 | * Thread managing health check socket. | |
4436 | */ | |
4437 | static void *thread_manage_health(void *data) | |
4438 | { | |
eb4a2943 | 4439 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4440 | uint32_t revents, nb_fd; |
4441 | struct lttng_poll_event events; | |
0c89d795 MD |
4442 | struct health_comm_msg msg; |
4443 | struct health_comm_reply reply; | |
44a5e5eb DG |
4444 | |
4445 | DBG("[thread] Manage health check started"); | |
4446 | ||
4447 | rcu_register_thread(); | |
4448 | ||
6d737ce4 DG |
4449 | /* We might hit an error path before this is created. */ |
4450 | lttng_poll_init(&events); | |
3cc04881 | 4451 | |
44a5e5eb | 4452 | /* Create unix socket */ |
e6142f2e | 4453 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4454 | if (sock < 0) { |
4455 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4456 | goto error; |
4457 | } | |
4458 | ||
6c71277b MD |
4459 | if (is_root) { |
4460 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4461 | ret = chown(config.health_unix_sock_path.value, 0, |
4462 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4463 | if (ret < 0) { |
e6142f2e | 4464 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4465 | PERROR("chown"); |
6c71277b MD |
4466 | goto error; |
4467 | } | |
4468 | ||
e6142f2e | 4469 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4470 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4471 | if (ret < 0) { | |
e6142f2e | 4472 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4473 | PERROR("chmod"); |
6c71277b MD |
4474 | goto error; |
4475 | } | |
4476 | } | |
4477 | ||
b662582b DG |
4478 | /* |
4479 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4480 | * show must go on. | |
4481 | */ | |
4482 | (void) utils_set_fd_cloexec(sock); | |
4483 | ||
44a5e5eb DG |
4484 | ret = lttcomm_listen_unix_sock(sock); |
4485 | if (ret < 0) { | |
4486 | goto error; | |
4487 | } | |
4488 | ||
4489 | /* | |
4490 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4491 | * more will be added to this poll set. | |
4492 | */ | |
d0b96690 | 4493 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4494 | if (ret < 0) { |
4495 | goto error; | |
4496 | } | |
4497 | ||
4498 | /* Add the application registration socket */ | |
4499 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4500 | if (ret < 0) { | |
4501 | goto error; | |
4502 | } | |
4503 | ||
ef367a93 | 4504 | sessiond_notify_ready(); |
97bc1426 | 4505 | |
44a5e5eb DG |
4506 | while (1) { |
4507 | DBG("Health check ready"); | |
4508 | ||
44a5e5eb DG |
4509 | /* Inifinite blocking call, waiting for transmission */ |
4510 | restart: | |
4511 | ret = lttng_poll_wait(&events, -1); | |
4512 | if (ret < 0) { | |
4513 | /* | |
4514 | * Restart interrupted system call. | |
4515 | */ | |
4516 | if (errno == EINTR) { | |
4517 | goto restart; | |
4518 | } | |
4519 | goto error; | |
4520 | } | |
4521 | ||
0d9c5d77 DG |
4522 | nb_fd = ret; |
4523 | ||
44a5e5eb DG |
4524 | for (i = 0; i < nb_fd; i++) { |
4525 | /* Fetch once the poll data */ | |
4526 | revents = LTTNG_POLL_GETEV(&events, i); | |
4527 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4528 | ||
fd20dac9 MD |
4529 | if (!revents) { |
4530 | /* No activity for this FD (poll implementation). */ | |
4531 | continue; | |
4532 | } | |
4533 | ||
44a5e5eb | 4534 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4535 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4536 | if (ret) { |
139ac872 MD |
4537 | err = 0; |
4538 | goto exit; | |
44a5e5eb DG |
4539 | } |
4540 | ||
4541 | /* Event on the registration socket */ | |
4542 | if (pollfd == sock) { | |
03e43155 MD |
4543 | if (revents & LPOLLIN) { |
4544 | continue; | |
4545 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4546 | ERR("Health socket poll error"); |
4547 | goto error; | |
03e43155 MD |
4548 | } else { |
4549 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4550 | goto error; | |
44a5e5eb DG |
4551 | } |
4552 | } | |
4553 | } | |
4554 | ||
4555 | new_sock = lttcomm_accept_unix_sock(sock); | |
4556 | if (new_sock < 0) { | |
4557 | goto error; | |
4558 | } | |
4559 | ||
b662582b DG |
4560 | /* |
4561 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4562 | * show must go on. | |
4563 | */ | |
4564 | (void) utils_set_fd_cloexec(new_sock); | |
4565 | ||
44a5e5eb DG |
4566 | DBG("Receiving data from client for health..."); |
4567 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4568 | if (ret <= 0) { | |
4569 | DBG("Nothing recv() from client... continuing"); | |
4570 | ret = close(new_sock); | |
4571 | if (ret) { | |
4572 | PERROR("close"); | |
4573 | } | |
44a5e5eb DG |
4574 | continue; |
4575 | } | |
4576 | ||
4577 | rcu_thread_online(); | |
4578 | ||
53efb85a | 4579 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4580 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4581 | /* | |
4582 | * health_check_state returns 0 if health is | |
4583 | * bad. | |
4584 | */ | |
4585 | if (!health_check_state(health_sessiond, i)) { | |
4586 | reply.ret_code |= 1ULL << i; | |
4587 | } | |
44a5e5eb DG |
4588 | } |
4589 | ||
6c71277b | 4590 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4591 | |
4592 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4593 | if (ret < 0) { | |
4594 | ERR("Failed to send health data back to client"); | |
4595 | } | |
4596 | ||
4597 | /* End of transmission */ | |
4598 | ret = close(new_sock); | |
4599 | if (ret) { | |
4600 | PERROR("close"); | |
4601 | } | |
44a5e5eb DG |
4602 | } |
4603 | ||
139ac872 | 4604 | exit: |
44a5e5eb | 4605 | error: |
139ac872 MD |
4606 | if (err) { |
4607 | ERR("Health error occurred in %s", __func__); | |
4608 | } | |
44a5e5eb | 4609 | DBG("Health check thread dying"); |
e6142f2e | 4610 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4611 | if (sock >= 0) { |
4612 | ret = close(sock); | |
4613 | if (ret) { | |
4614 | PERROR("close"); | |
4615 | } | |
4616 | } | |
44a5e5eb DG |
4617 | |
4618 | lttng_poll_clean(&events); | |
b11d6a7f | 4619 | stop_threads(); |
44a5e5eb DG |
4620 | rcu_unregister_thread(); |
4621 | return NULL; | |
4622 | } | |
4623 | ||
1d4b027a | 4624 | /* |
d063d709 DG |
4625 | * This thread manage all clients request using the unix client socket for |
4626 | * communication. | |
1d4b027a DG |
4627 | */ |
4628 | static void *thread_manage_clients(void *data) | |
4629 | { | |
139ac872 | 4630 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4631 | int sock_error; |
5eb91c98 | 4632 | uint32_t revents, nb_fd; |
273ea72c | 4633 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4634 | struct lttng_poll_event events; |
1d4b027a DG |
4635 | |
4636 | DBG("[thread] Manage client started"); | |
4637 | ||
f6a9efaa DG |
4638 | rcu_register_thread(); |
4639 | ||
6c71277b | 4640 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4641 | |
840cb59c | 4642 | health_code_update(); |
44a5e5eb | 4643 | |
1d4b027a DG |
4644 | ret = lttcomm_listen_unix_sock(client_sock); |
4645 | if (ret < 0) { | |
35df2755 | 4646 | goto error_listen; |
1d4b027a DG |
4647 | } |
4648 | ||
5eb91c98 DG |
4649 | /* |
4650 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4651 | * more will be added to this poll set. | |
4652 | */ | |
d0b96690 | 4653 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4654 | if (ret < 0) { |
35df2755 | 4655 | goto error_create_poll; |
5eb91c98 | 4656 | } |
273ea72c | 4657 | |
5eb91c98 DG |
4658 | /* Add the application registration socket */ |
4659 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4660 | if (ret < 0) { | |
4661 | goto error; | |
4662 | } | |
273ea72c | 4663 | |
ef367a93 JG |
4664 | ret = sem_post(&load_info->message_thread_ready); |
4665 | if (ret) { | |
4666 | PERROR("sem_post message_thread_ready"); | |
4667 | goto error; | |
4668 | } | |
0bb7724a | 4669 | |
f28f9e44 JG |
4670 | /* |
4671 | * Wait until all support threads are initialized before accepting | |
4672 | * commands. | |
4673 | */ | |
4674 | while (uatomic_read(<tng_sessiond_ready) != 0) { | |
4675 | fd_set read_fds; | |
4676 | struct timeval timeout; | |
4677 | ||
4678 | FD_ZERO(&read_fds); | |
4679 | FD_SET(thread_quit_pipe[0], &read_fds); | |
4680 | memset(&timeout, 0, sizeof(timeout)); | |
4681 | timeout.tv_usec = 1000; | |
4682 | ||
4683 | /* | |
4684 | * If a support thread failed to launch, it may signal that | |
4685 | * we must exit and the sessiond would never be marked as | |
4686 | * "ready". | |
4687 | * | |
4688 | * The timeout is set to 1ms, which serves as a way to | |
4689 | * pace down this check. | |
4690 | */ | |
4691 | ret = select(thread_quit_pipe[0] + 1, &read_fds, NULL, NULL, | |
4692 | &timeout); | |
4693 | if (ret > 0 || (ret < 0 && errno != EINTR)) { | |
4694 | goto exit; | |
4695 | } | |
4696 | } | |
8b0d4636 JG |
4697 | /* |
4698 | * This barrier is paired with the one in sessiond_notify_ready() to | |
4699 | * ensure that loads accessing data initialized by the other threads, | |
4700 | * on which this thread was waiting, are not performed before this point. | |
4701 | * | |
4702 | * Note that this could be a 'read' memory barrier, but a full barrier | |
4703 | * is used in case the code changes. The performance implications of | |
4704 | * this choice are minimal since this is a slow path. | |
4705 | */ | |
4706 | cmm_smp_mb(); | |
f28f9e44 | 4707 | |
72453c8c MD |
4708 | /* This testpoint is after we signal readiness to the parent. */ |
4709 | if (testpoint(sessiond_thread_manage_clients)) { | |
4710 | goto error; | |
4711 | } | |
4712 | ||
e547b070 | 4713 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4714 | goto error; |
4715 | } | |
8ac94142 | 4716 | |
840cb59c | 4717 | health_code_update(); |
44a5e5eb | 4718 | |
1d4b027a | 4719 | while (1) { |
1d4b027a | 4720 | DBG("Accepting client command ..."); |
273ea72c DG |
4721 | |
4722 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4723 | restart: |
a78af745 | 4724 | health_poll_entry(); |
5eb91c98 | 4725 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4726 | health_poll_exit(); |
273ea72c | 4727 | if (ret < 0) { |
88f2b785 MD |
4728 | /* |
4729 | * Restart interrupted system call. | |
4730 | */ | |
4731 | if (errno == EINTR) { | |
4732 | goto restart; | |
4733 | } | |
273ea72c DG |
4734 | goto error; |
4735 | } | |
4736 | ||
0d9c5d77 DG |
4737 | nb_fd = ret; |
4738 | ||
5eb91c98 DG |
4739 | for (i = 0; i < nb_fd; i++) { |
4740 | /* Fetch once the poll data */ | |
4741 | revents = LTTNG_POLL_GETEV(&events, i); | |
4742 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4743 | ||
840cb59c | 4744 | health_code_update(); |
44a5e5eb | 4745 | |
fd20dac9 MD |
4746 | if (!revents) { |
4747 | /* No activity for this FD (poll implementation). */ | |
4748 | continue; | |
4749 | } | |
4750 | ||
5eb91c98 | 4751 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4752 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4753 | if (ret) { |
139ac872 MD |
4754 | err = 0; |
4755 | goto exit; | |
5eb91c98 DG |
4756 | } |
4757 | ||
4758 | /* Event on the registration socket */ | |
4759 | if (pollfd == client_sock) { | |
03e43155 MD |
4760 | if (revents & LPOLLIN) { |
4761 | continue; | |
4762 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4763 | ERR("Client socket poll error"); |
4764 | goto error; | |
03e43155 MD |
4765 | } else { |
4766 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4767 | goto error; | |
5eb91c98 DG |
4768 | } |
4769 | } | |
4770 | } | |
4771 | ||
4772 | DBG("Wait for client response"); | |
4773 | ||
840cb59c | 4774 | health_code_update(); |
44a5e5eb | 4775 | |
5eb91c98 DG |
4776 | sock = lttcomm_accept_unix_sock(client_sock); |
4777 | if (sock < 0) { | |
273ea72c | 4778 | goto error; |
273ea72c DG |
4779 | } |
4780 | ||
b662582b DG |
4781 | /* |
4782 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4783 | * show must go on. | |
4784 | */ | |
4785 | (void) utils_set_fd_cloexec(sock); | |
4786 | ||
be040666 DG |
4787 | /* Set socket option for credentials retrieval */ |
4788 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4789 | if (ret < 0) { | |
4790 | goto error; | |
4791 | } | |
4792 | ||
5eb91c98 | 4793 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4794 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4795 | if (cmd_ctx == NULL) { |
76d7553f | 4796 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4797 | goto error; |
5eb91c98 | 4798 | } |
1d4b027a | 4799 | |
5eb91c98 | 4800 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4801 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4802 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4803 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4804 | goto error; |
4805 | } | |
1d4b027a | 4806 | |
5eb91c98 DG |
4807 | cmd_ctx->llm = NULL; |
4808 | cmd_ctx->session = NULL; | |
1d4b027a | 4809 | |
840cb59c | 4810 | health_code_update(); |
44a5e5eb | 4811 | |
5eb91c98 DG |
4812 | /* |
4813 | * Data is received from the lttng client. The struct | |
4814 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4815 | * the client. | |
4816 | */ | |
4817 | DBG("Receiving data from client ..."); | |
be040666 DG |
4818 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4819 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4820 | if (ret <= 0) { |
4821 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4822 | ret = close(sock); |
4823 | if (ret) { | |
4824 | PERROR("close"); | |
4825 | } | |
4826 | sock = -1; | |
a2c0da86 | 4827 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4828 | continue; |
4829 | } | |
1d4b027a | 4830 | |
840cb59c | 4831 | health_code_update(); |
44a5e5eb | 4832 | |
5eb91c98 DG |
4833 | // TODO: Validate cmd_ctx including sanity check for |
4834 | // security purpose. | |
f7776ea7 | 4835 | |
f6a9efaa | 4836 | rcu_thread_online(); |
5eb91c98 DG |
4837 | /* |
4838 | * This function dispatch the work to the kernel or userspace tracer | |
4839 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4840 | * informations for the client. The command context struct contains | |
4841 | * everything this function may needs. | |
4842 | */ | |
53a80697 | 4843 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4844 | rcu_thread_offline(); |
5eb91c98 | 4845 | if (ret < 0) { |
36134aa1 DG |
4846 | ret = close(sock); |
4847 | if (ret) { | |
4848 | PERROR("close"); | |
53a80697 | 4849 | } |
36134aa1 | 4850 | sock = -1; |
bbd973c2 | 4851 | /* |
5eb91c98 | 4852 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4853 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4854 | * (ENOMEM). Error detected but still accept |
4855 | * command, unless a socket error has been | |
4856 | * detected. | |
bbd973c2 | 4857 | */ |
bbd973c2 | 4858 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4859 | continue; |
4860 | } | |
d6e4fca4 | 4861 | |
840cb59c | 4862 | health_code_update(); |
44a5e5eb | 4863 | |
a1ac8b97 | 4864 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4865 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4866 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4867 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4868 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4869 | if (ret < 0) { |
4870 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4871 | } |
1d4b027a | 4872 | |
5eb91c98 | 4873 | /* End of transmission */ |
76d7553f MD |
4874 | ret = close(sock); |
4875 | if (ret) { | |
4876 | PERROR("close"); | |
4877 | } | |
4878 | sock = -1; | |
be040666 DG |
4879 | |
4880 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4881 | |
840cb59c | 4882 | health_code_update(); |
273ea72c DG |
4883 | } |
4884 | ||
139ac872 | 4885 | exit: |
5eb91c98 | 4886 | error: |
35df2755 CB |
4887 | if (sock >= 0) { |
4888 | ret = close(sock); | |
4889 | if (ret) { | |
4890 | PERROR("close"); | |
4891 | } | |
139ac872 | 4892 | } |
44a5e5eb | 4893 | |
35df2755 CB |
4894 | lttng_poll_clean(&events); |
4895 | clean_command_ctx(&cmd_ctx); | |
4896 | ||
4897 | error_listen: | |
4898 | error_create_poll: | |
e6142f2e | 4899 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4900 | if (client_sock >= 0) { |
4901 | ret = close(client_sock); | |
4902 | if (ret) { | |
4903 | PERROR("close"); | |
4904 | } | |
a4b35e07 | 4905 | } |
35df2755 CB |
4906 | |
4907 | if (err) { | |
840cb59c | 4908 | health_error(); |
35df2755 | 4909 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4910 | } |
273ea72c | 4911 | |
8782cc74 | 4912 | health_unregister(health_sessiond); |
35df2755 CB |
4913 | |
4914 | DBG("Client thread dying"); | |
f6a9efaa DG |
4915 | |
4916 | rcu_unregister_thread(); | |
4a15001e MD |
4917 | |
4918 | /* | |
4919 | * Since we are creating the consumer threads, we own them, so we need | |
4920 | * to join them before our thread exits. | |
4921 | */ | |
4922 | ret = join_consumer_thread(&kconsumer_data); | |
4923 | if (ret) { | |
4924 | errno = ret; | |
4925 | PERROR("join_consumer"); | |
4926 | } | |
4927 | ||
4928 | ret = join_consumer_thread(&ustconsumer32_data); | |
4929 | if (ret) { | |
4930 | errno = ret; | |
4931 | PERROR("join_consumer ust32"); | |
4932 | } | |
4933 | ||
4934 | ret = join_consumer_thread(&ustconsumer64_data); | |
4935 | if (ret) { | |
4936 | errno = ret; | |
4937 | PERROR("join_consumer ust64"); | |
4938 | } | |
1d4b027a DG |
4939 | return NULL; |
4940 | } | |
4941 | ||
c0232ea5 JG |
4942 | static int string_match(const char *str1, const char *str2) |
4943 | { | |
4944 | return (str1 && str2) && !strcmp(str1, str2); | |
4945 | } | |
4946 | ||
fac6795d | 4947 | /* |
26296c48 JG |
4948 | * Take an option from the getopt output and set it in the right variable to be |
4949 | * used later. | |
4950 | * | |
4951 | * Return 0 on success else a negative value. | |
fac6795d | 4952 | */ |
26296c48 | 4953 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4954 | { |
26296c48 | 4955 | int ret = 0; |
fac6795d | 4956 | |
c0232ea5 | 4957 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4958 | if (!arg || *arg == '\0') { |
4959 | ret = -EINVAL; | |
4960 | goto end; | |
4961 | } | |
e8fa9fb0 MD |
4962 | if (lttng_is_setuid_setgid()) { |
4963 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4964 | "-c, --client-sock"); | |
4965 | } else { | |
e6142f2e JG |
4966 | config_string_set(&config.client_unix_sock_path, |
4967 | strdup(arg)); | |
4968 | if (!config.client_unix_sock_path.value) { | |
4969 | ret = -ENOMEM; | |
4970 | PERROR("strdup"); | |
4971 | } | |
e8fa9fb0 | 4972 | } |
c0232ea5 | 4973 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4974 | if (!arg || *arg == '\0') { |
4975 | ret = -EINVAL; | |
4976 | goto end; | |
4977 | } | |
e8fa9fb0 MD |
4978 | if (lttng_is_setuid_setgid()) { |
4979 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4980 | "-a, --apps-sock"); | |
4981 | } else { | |
e6142f2e JG |
4982 | config_string_set(&config.apps_unix_sock_path, |
4983 | strdup(arg)); | |
4984 | if (!config.apps_unix_sock_path.value) { | |
4985 | ret = -ENOMEM; | |
4986 | PERROR("strdup"); | |
4987 | } | |
e8fa9fb0 | 4988 | } |
c0232ea5 | 4989 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4990 | config.daemonize = true; |
c0232ea5 | 4991 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4992 | config.background = true; |
c0232ea5 | 4993 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4994 | if (!arg || *arg == '\0') { |
4995 | ret = -EINVAL; | |
4996 | goto end; | |
4997 | } | |
e8fa9fb0 MD |
4998 | if (lttng_is_setuid_setgid()) { |
4999 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5000 | "-g, --group"); | |
5001 | } else { | |
e6142f2e JG |
5002 | config_string_set(&config.tracing_group_name, |
5003 | strdup(arg)); | |
5004 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 5005 | ret = -ENOMEM; |
e6142f2e | 5006 | PERROR("strdup"); |
e8fa9fb0 | 5007 | } |
db322c4d | 5008 | } |
c0232ea5 | 5009 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 5010 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 5011 | if (ret) { |
4fc83d94 | 5012 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
5013 | perror("exec"); |
5014 | } | |
5015 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 5016 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
5017 | fprintf(stdout, "%s\n", VERSION); |
5018 | exit(EXIT_SUCCESS); | |
c0232ea5 | 5019 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 5020 | config.sig_parent = true; |
c0232ea5 | 5021 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
5022 | if (!arg || *arg == '\0') { |
5023 | ret = -EINVAL; | |
5024 | goto end; | |
5025 | } | |
e8fa9fb0 MD |
5026 | if (lttng_is_setuid_setgid()) { |
5027 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5028 | "--kconsumerd-err-sock"); | |
5029 | } else { | |
e6142f2e JG |
5030 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
5031 | strdup(arg)); | |
5032 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
5033 | ret = -ENOMEM; | |
5034 | PERROR("strdup"); | |
5035 | } | |
e8fa9fb0 | 5036 | } |
c0232ea5 | 5037 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
5038 | if (!arg || *arg == '\0') { |
5039 | ret = -EINVAL; | |
5040 | goto end; | |
5041 | } | |
e8fa9fb0 MD |
5042 | if (lttng_is_setuid_setgid()) { |
5043 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5044 | "--kconsumerd-cmd-sock"); | |
5045 | } else { | |
e6142f2e JG |
5046 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
5047 | strdup(arg)); | |
5048 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
5049 | ret = -ENOMEM; | |
5050 | PERROR("strdup"); | |
5051 | } | |
e8fa9fb0 | 5052 | } |
c0232ea5 | 5053 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
5054 | if (!arg || *arg == '\0') { |
5055 | ret = -EINVAL; | |
5056 | goto end; | |
5057 | } | |
e8fa9fb0 MD |
5058 | if (lttng_is_setuid_setgid()) { |
5059 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5060 | "--ustconsumerd64-err-sock"); | |
5061 | } else { | |
e6142f2e JG |
5062 | config_string_set(&config.consumerd64_err_unix_sock_path, |
5063 | strdup(arg)); | |
5064 | if (!config.consumerd64_err_unix_sock_path.value) { | |
5065 | ret = -ENOMEM; | |
5066 | PERROR("strdup"); | |
5067 | } | |
e8fa9fb0 | 5068 | } |
c0232ea5 | 5069 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
5070 | if (!arg || *arg == '\0') { |
5071 | ret = -EINVAL; | |
5072 | goto end; | |
5073 | } | |
e8fa9fb0 MD |
5074 | if (lttng_is_setuid_setgid()) { |
5075 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5076 | "--ustconsumerd64-cmd-sock"); | |
5077 | } else { | |
e6142f2e JG |
5078 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
5079 | strdup(arg)); | |
5080 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
5081 | ret = -ENOMEM; | |
5082 | PERROR("strdup"); | |
5083 | } | |
e8fa9fb0 | 5084 | } |
c0232ea5 | 5085 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
5086 | if (!arg || *arg == '\0') { |
5087 | ret = -EINVAL; | |
5088 | goto end; | |
5089 | } | |
e8fa9fb0 MD |
5090 | if (lttng_is_setuid_setgid()) { |
5091 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5092 | "--ustconsumerd32-err-sock"); | |
5093 | } else { | |
e6142f2e JG |
5094 | config_string_set(&config.consumerd32_err_unix_sock_path, |
5095 | strdup(arg)); | |
5096 | if (!config.consumerd32_err_unix_sock_path.value) { | |
5097 | ret = -ENOMEM; | |
5098 | PERROR("strdup"); | |
5099 | } | |
e8fa9fb0 | 5100 | } |
c0232ea5 | 5101 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
5102 | if (!arg || *arg == '\0') { |
5103 | ret = -EINVAL; | |
5104 | goto end; | |
5105 | } | |
e8fa9fb0 MD |
5106 | if (lttng_is_setuid_setgid()) { |
5107 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5108 | "--ustconsumerd32-cmd-sock"); | |
5109 | } else { | |
e6142f2e JG |
5110 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
5111 | strdup(arg)); | |
5112 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
5113 | ret = -ENOMEM; | |
5114 | PERROR("strdup"); | |
5115 | } | |
e8fa9fb0 | 5116 | } |
c0232ea5 | 5117 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 5118 | config.no_kernel = true; |
c0232ea5 | 5119 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 5120 | config.quiet = true; |
c0232ea5 | 5121 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
5122 | /* Verbose level can increase using multiple -v */ |
5123 | if (arg) { | |
13755a18 | 5124 | /* Value obtained from config file */ |
e6142f2e | 5125 | config.verbose = config_parse_value(arg); |
26296c48 | 5126 | } else { |
13755a18 | 5127 | /* -v used on command line */ |
e6142f2e | 5128 | config.verbose++; |
26296c48 | 5129 | } |
13755a18 | 5130 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
5131 | config.verbose = config.verbose < 0 ? 0 : |
5132 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 5133 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 5134 | if (arg) { |
e6142f2e | 5135 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 5136 | } else { |
e6142f2e | 5137 | config.verbose_consumer++; |
26296c48 | 5138 | } |
c0232ea5 | 5139 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
5140 | if (!arg || *arg == '\0') { |
5141 | ret = -EINVAL; | |
5142 | goto end; | |
5143 | } | |
e8fa9fb0 MD |
5144 | if (lttng_is_setuid_setgid()) { |
5145 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5146 | "--consumerd32-path"); | |
5147 | } else { | |
e6142f2e JG |
5148 | config_string_set(&config.consumerd32_bin_path, |
5149 | strdup(arg)); | |
5150 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
5151 | PERROR("strdup"); |
5152 | ret = -ENOMEM; | |
5153 | } | |
db322c4d | 5154 | } |
c0232ea5 | 5155 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
5156 | if (!arg || *arg == '\0') { |
5157 | ret = -EINVAL; | |
5158 | goto end; | |
5159 | } | |
e8fa9fb0 MD |
5160 | if (lttng_is_setuid_setgid()) { |
5161 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5162 | "--consumerd32-libdir"); | |
5163 | } else { | |
e6142f2e JG |
5164 | config_string_set(&config.consumerd32_lib_dir, |
5165 | strdup(arg)); | |
5166 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
5167 | PERROR("strdup"); |
5168 | ret = -ENOMEM; | |
5169 | } | |
db322c4d | 5170 | } |
c0232ea5 | 5171 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
5172 | if (!arg || *arg == '\0') { |
5173 | ret = -EINVAL; | |
5174 | goto end; | |
5175 | } | |
e8fa9fb0 MD |
5176 | if (lttng_is_setuid_setgid()) { |
5177 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5178 | "--consumerd64-path"); | |
5179 | } else { | |
e6142f2e JG |
5180 | config_string_set(&config.consumerd64_bin_path, |
5181 | strdup(arg)); | |
5182 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
5183 | PERROR("strdup"); |
5184 | ret = -ENOMEM; | |
5185 | } | |
db322c4d | 5186 | } |
c0232ea5 | 5187 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
5188 | if (!arg || *arg == '\0') { |
5189 | ret = -EINVAL; | |
5190 | goto end; | |
5191 | } | |
e8fa9fb0 MD |
5192 | if (lttng_is_setuid_setgid()) { |
5193 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5194 | "--consumerd64-libdir"); | |
5195 | } else { | |
e6142f2e JG |
5196 | config_string_set(&config.consumerd64_lib_dir, |
5197 | strdup(arg)); | |
5198 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
5199 | PERROR("strdup"); |
5200 | ret = -ENOMEM; | |
5201 | } | |
db322c4d | 5202 | } |
c0232ea5 | 5203 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
5204 | if (!arg || *arg == '\0') { |
5205 | ret = -EINVAL; | |
5206 | goto end; | |
5207 | } | |
e8fa9fb0 MD |
5208 | if (lttng_is_setuid_setgid()) { |
5209 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5210 | "-p, --pidfile"); | |
5211 | } else { | |
e6142f2e JG |
5212 | config_string_set(&config.pid_file_path, strdup(arg)); |
5213 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
5214 | PERROR("strdup"); |
5215 | ret = -ENOMEM; | |
5216 | } | |
db322c4d | 5217 | } |
c0232ea5 | 5218 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
5219 | if (!arg || *arg == '\0') { |
5220 | ret = -EINVAL; | |
5221 | goto end; | |
5222 | } | |
e8fa9fb0 MD |
5223 | if (lttng_is_setuid_setgid()) { |
5224 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5225 | "--agent-tcp-port"); | |
5226 | } else { | |
5227 | unsigned long v; | |
4d076222 | 5228 | |
e8fa9fb0 MD |
5229 | errno = 0; |
5230 | v = strtoul(arg, NULL, 0); | |
5231 | if (errno != 0 || !isdigit(arg[0])) { | |
5232 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
5233 | return -1; | |
5234 | } | |
5235 | if (v == 0 || v >= 65535) { | |
5236 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
5237 | return -1; | |
5238 | } | |
2288467f JG |
5239 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
5240 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 5241 | } |
c0232ea5 | 5242 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
5243 | if (!arg || *arg == '\0') { |
5244 | ret = -EINVAL; | |
5245 | goto end; | |
5246 | } | |
e8fa9fb0 MD |
5247 | if (lttng_is_setuid_setgid()) { |
5248 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5249 | "-l, --load"); | |
5250 | } else { | |
e6142f2e JG |
5251 | config_string_set(&config.load_session_path, strdup(arg)); |
5252 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
5253 | PERROR("strdup"); |
5254 | ret = -ENOMEM; | |
5255 | } | |
ef367a93 | 5256 | } |
c0232ea5 | 5257 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
5258 | if (!arg || *arg == '\0') { |
5259 | ret = -EINVAL; | |
5260 | goto end; | |
5261 | } | |
e8fa9fb0 MD |
5262 | if (lttng_is_setuid_setgid()) { |
5263 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5264 | "--kmod-probes"); | |
5265 | } else { | |
e6142f2e JG |
5266 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
5267 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
5268 | PERROR("strdup"); |
5269 | ret = -ENOMEM; | |
5270 | } | |
c9d42407 | 5271 | } |
c0232ea5 | 5272 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
5273 | if (!arg || *arg == '\0') { |
5274 | ret = -EINVAL; | |
5275 | goto end; | |
5276 | } | |
e8fa9fb0 MD |
5277 | if (lttng_is_setuid_setgid()) { |
5278 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5279 | "--extra-kmod-probes"); | |
5280 | } else { | |
e6142f2e JG |
5281 | config_string_set(&config.kmod_extra_probes_list, |
5282 | strdup(arg)); | |
5283 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
5284 | PERROR("strdup"); |
5285 | ret = -ENOMEM; | |
5286 | } | |
db322c4d | 5287 | } |
c0232ea5 JG |
5288 | } else if (string_match(optname, "config") || opt == 'f') { |
5289 | /* This is handled in set_options() thus silent skip. */ | |
5290 | goto end; | |
5291 | } else { | |
26296c48 JG |
5292 | /* Unknown option or other error. |
5293 | * Error is printed by getopt, just return */ | |
5294 | ret = -1; | |
5295 | } | |
5296 | ||
f3dd7ce7 | 5297 | end: |
c5d350b2 JG |
5298 | if (ret == -EINVAL) { |
5299 | const char *opt_name = "unknown"; | |
5300 | int i; | |
5301 | ||
5302 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5303 | i++) { | |
5304 | if (opt == long_options[i].val) { | |
5305 | opt_name = long_options[i].name; | |
5306 | break; | |
5307 | } | |
5308 | } | |
5309 | ||
5310 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5311 | opt_name); | |
5312 | } | |
f3dd7ce7 | 5313 | |
26296c48 JG |
5314 | return ret; |
5315 | } | |
5316 | ||
5317 | /* | |
5318 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5319 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5320 | * return value conventions. |
5321 | */ | |
5322 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5323 | { | |
5324 | int ret = 0, i; | |
5325 | ||
5326 | if (!entry || !entry->name || !entry->value) { | |
5327 | ret = -EINVAL; | |
5328 | goto end; | |
5329 | } | |
5330 | ||
5331 | /* Check if the option is to be ignored */ | |
5332 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5333 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5334 | goto end; | |
5335 | } | |
5336 | } | |
5337 | ||
5338 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5339 | i++) { | |
5340 | ||
5341 | /* Ignore if not fully matched. */ | |
5342 | if (strcmp(entry->name, long_options[i].name)) { | |
5343 | continue; | |
5344 | } | |
5345 | ||
5346 | /* | |
5347 | * If the option takes no argument on the command line, we have to | |
5348 | * check if the value is "true". We support non-zero numeric values, | |
5349 | * true, on and yes. | |
5350 | */ | |
5351 | if (!long_options[i].has_arg) { | |
5352 | ret = config_parse_value(entry->value); | |
5353 | if (ret <= 0) { | |
5354 | if (ret) { | |
5355 | WARN("Invalid configuration value \"%s\" for option %s", | |
5356 | entry->value, entry->name); | |
5357 | } | |
5358 | /* False, skip boolean config option. */ | |
5359 | goto end; | |
4d076222 | 5360 | } |
26296c48 JG |
5361 | } |
5362 | ||
5363 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5364 | goto end; | |
5365 | } | |
5366 | ||
5367 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5368 | ||
5369 | end: | |
5370 | return ret; | |
5371 | } | |
5372 | ||
5373 | /* | |
5374 | * daemon configuration loading and argument parsing | |
5375 | */ | |
5376 | static int set_options(int argc, char **argv) | |
5377 | { | |
5378 | int ret = 0, c = 0, option_index = 0; | |
5379 | int orig_optopt = optopt, orig_optind = optind; | |
5380 | char *optstring; | |
5381 | const char *config_path = NULL; | |
5382 | ||
5383 | optstring = utils_generate_optstring(long_options, | |
5384 | sizeof(long_options) / sizeof(struct option)); | |
5385 | if (!optstring) { | |
5386 | ret = -ENOMEM; | |
5387 | goto end; | |
5388 | } | |
5389 | ||
5390 | /* Check for the --config option */ | |
5391 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5392 | &option_index)) != -1) { | |
5393 | if (c == '?') { | |
5394 | ret = -EINVAL; | |
5395 | goto end; | |
5396 | } else if (c != 'f') { | |
5397 | /* if not equal to --config option. */ | |
5398 | continue; | |
5399 | } | |
5400 | ||
e8fa9fb0 MD |
5401 | if (lttng_is_setuid_setgid()) { |
5402 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5403 | "-f, --config"); | |
5404 | } else { | |
5405 | config_path = utils_expand_path(optarg); | |
5406 | if (!config_path) { | |
5407 | ERR("Failed to resolve path: %s", optarg); | |
5408 | } | |
26296c48 JG |
5409 | } |
5410 | } | |
5411 | ||
5412 | ret = config_get_section_entries(config_path, config_section_name, | |
5413 | config_entry_handler, NULL); | |
5414 | if (ret) { | |
5415 | if (ret > 0) { | |
5416 | ERR("Invalid configuration option at line %i", ret); | |
5417 | ret = -1; | |
5418 | } | |
5419 | goto end; | |
5420 | } | |
5421 | ||
5422 | /* Reset getopt's global state */ | |
5423 | optopt = orig_optopt; | |
5424 | optind = orig_optind; | |
5425 | while (1) { | |
c0232ea5 JG |
5426 | option_index = -1; |
5427 | /* | |
5428 | * getopt_long() will not set option_index if it encounters a | |
5429 | * short option. | |
5430 | */ | |
5431 | c = getopt_long(argc, argv, optstring, long_options, | |
5432 | &option_index); | |
26296c48 | 5433 | if (c == -1) { |
4d076222 DG |
5434 | break; |
5435 | } | |
26296c48 | 5436 | |
c0232ea5 JG |
5437 | /* |
5438 | * Pass NULL as the long option name if popt left the index | |
5439 | * unset. | |
5440 | */ | |
5441 | ret = set_option(c, optarg, | |
5442 | option_index < 0 ? NULL : | |
5443 | long_options[option_index].name); | |
26296c48 JG |
5444 | if (ret < 0) { |
5445 | break; | |
fac6795d DG |
5446 | } |
5447 | } | |
5448 | ||
26296c48 JG |
5449 | end: |
5450 | free(optstring); | |
5451 | return ret; | |
fac6795d DG |
5452 | } |
5453 | ||
5454 | /* | |
d063d709 | 5455 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5456 | * apps_sock - The communication socket for all UST apps. |
5457 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5458 | */ |
cf3af59e | 5459 | static int init_daemon_socket(void) |
fac6795d DG |
5460 | { |
5461 | int ret = 0; | |
5462 | mode_t old_umask; | |
5463 | ||
5464 | old_umask = umask(0); | |
5465 | ||
5466 | /* Create client tool unix socket */ | |
e6142f2e | 5467 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5468 | if (client_sock < 0) { |
e6142f2e | 5469 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5470 | ret = -1; |
5471 | goto end; | |
5472 | } | |
5473 | ||
b662582b DG |
5474 | /* Set the cloexec flag */ |
5475 | ret = utils_set_fd_cloexec(client_sock); | |
5476 | if (ret < 0) { | |
5477 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5478 | "Continuing but note that the consumer daemon will have a " | |
5479 | "reference to this socket on exec()", client_sock); | |
5480 | } | |
5481 | ||
fac6795d | 5482 | /* File permission MUST be 660 */ |
e6142f2e | 5483 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5484 | if (ret < 0) { |
e6142f2e | 5485 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5486 | PERROR("chmod"); |
fac6795d DG |
5487 | goto end; |
5488 | } | |
5489 | ||
5490 | /* Create the application unix socket */ | |
e6142f2e | 5491 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5492 | if (apps_sock < 0) { |
e6142f2e | 5493 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5494 | ret = -1; |
5495 | goto end; | |
5496 | } | |
5497 | ||
b662582b DG |
5498 | /* Set the cloexec flag */ |
5499 | ret = utils_set_fd_cloexec(apps_sock); | |
5500 | if (ret < 0) { | |
5501 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5502 | "Continuing but note that the consumer daemon will have a " | |
5503 | "reference to this socket on exec()", apps_sock); | |
5504 | } | |
5505 | ||
d6f42150 | 5506 | /* File permission MUST be 666 */ |
e6142f2e | 5507 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5508 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5509 | if (ret < 0) { |
e6142f2e | 5510 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5511 | PERROR("chmod"); |
fac6795d DG |
5512 | goto end; |
5513 | } | |
5514 | ||
b662582b DG |
5515 | DBG3("Session daemon client socket %d and application socket %d created", |
5516 | client_sock, apps_sock); | |
5517 | ||
fac6795d DG |
5518 | end: |
5519 | umask(old_umask); | |
5520 | return ret; | |
5521 | } | |
5522 | ||
f472090a JG |
5523 | /* |
5524 | * Create lockfile using the rundir and return its fd. | |
5525 | */ | |
5526 | static int create_lockfile(void) | |
5527 | { | |
5528 | return utils_create_lock_file(config.lock_file_path.value); | |
5529 | } | |
5530 | ||
fac6795d | 5531 | /* |
54d01ffb DG |
5532 | * Check if the global socket is available, and if a daemon is answering at the |
5533 | * other side. If yes, error is returned. | |
f472090a JG |
5534 | * |
5535 | * Also attempts to create and hold the lock file. | |
fac6795d | 5536 | */ |
cf3af59e | 5537 | static int check_existing_daemon(void) |
fac6795d | 5538 | { |
f472090a JG |
5539 | int ret = 0; |
5540 | ||
7d8234d9 | 5541 | /* Is there anybody out there ? */ |
099e26bd | 5542 | if (lttng_session_daemon_alive()) { |
f472090a JG |
5543 | ret = -EEXIST; |
5544 | goto end; | |
099e26bd | 5545 | } |
b09c7c76 | 5546 | |
f472090a JG |
5547 | lockfile_fd = create_lockfile(); |
5548 | if (lockfile_fd < 0) { | |
5549 | ret = -EEXIST; | |
5550 | goto end; | |
5551 | } | |
5552 | end: | |
5553 | return ret; | |
5554 | } | |
5555 | ||
5556 | static void sessiond_cleanup_lock_file(void) | |
5557 | { | |
5558 | int ret; | |
5559 | ||
5560 | /* | |
5561 | * Cleanup lock file by deleting it and finaly closing it which will | |
5562 | * release the file system lock. | |
5563 | */ | |
5564 | if (lockfile_fd >= 0) { | |
5565 | ret = remove(config.lock_file_path.value); | |
5566 | if (ret < 0) { | |
5567 | PERROR("remove lock file"); | |
5568 | } | |
5569 | ret = close(lockfile_fd); | |
5570 | if (ret < 0) { | |
5571 | PERROR("close lock file"); | |
5572 | } | |
5573 | } | |
fac6795d DG |
5574 | } |
5575 | ||
fac6795d | 5576 | /* |
d063d709 | 5577 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5578 | * |
d063d709 | 5579 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5580 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5581 | */ |
be040666 | 5582 | static int set_permissions(char *rundir) |
fac6795d DG |
5583 | { |
5584 | int ret; | |
996b65c8 | 5585 | gid_t gid; |
fac6795d | 5586 | |
e6142f2e | 5587 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5588 | |
d6f42150 | 5589 | /* Set lttng run dir */ |
be040666 | 5590 | ret = chown(rundir, 0, gid); |
d6f42150 | 5591 | if (ret < 0) { |
be040666 | 5592 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5593 | PERROR("chown"); |
d6f42150 DG |
5594 | } |
5595 | ||
6c71277b MD |
5596 | /* |
5597 | * Ensure all applications and tracing group can search the run | |
5598 | * dir. Allow everyone to read the directory, since it does not | |
5599 | * buy us anything to hide its content. | |
5600 | */ | |
5601 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5602 | if (ret < 0) { |
5603 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5604 | PERROR("chmod"); |
d1613cf5 JN |
5605 | } |
5606 | ||
d6f42150 | 5607 | /* lttng client socket path */ |
e6142f2e | 5608 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5609 | if (ret < 0) { |
e6142f2e | 5610 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5611 | PERROR("chown"); |
d6f42150 DG |
5612 | } |
5613 | ||
3bd1e081 | 5614 | /* kconsumer error socket path */ |
6c71277b | 5615 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5616 | if (ret < 0) { |
3bd1e081 | 5617 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5618 | PERROR("chown"); |
3bd1e081 MD |
5619 | } |
5620 | ||
7753dea8 | 5621 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5622 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5623 | if (ret < 0) { |
5624 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5625 | PERROR("chown"); |
7753dea8 MD |
5626 | } |
5627 | ||
5628 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5629 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5630 | if (ret < 0) { |
7753dea8 | 5631 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5632 | PERROR("chown"); |
fac6795d DG |
5633 | } |
5634 | ||
d6f42150 | 5635 | DBG("All permissions are set"); |
e07ae692 | 5636 | |
fac6795d DG |
5637 | return ret; |
5638 | } | |
5639 | ||
d6f42150 | 5640 | /* |
d063d709 | 5641 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5642 | */ |
e6142f2e | 5643 | static int create_lttng_rundir(void) |
d6f42150 DG |
5644 | { |
5645 | int ret; | |
5646 | ||
e6142f2e | 5647 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5648 | |
e6142f2e | 5649 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5650 | if (ret < 0) { |
b1f11e69 | 5651 | if (errno != EEXIST) { |
e6142f2e | 5652 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5653 | goto error; |
5654 | } else { | |
5655 | ret = 0; | |
5656 | } | |
d6f42150 DG |
5657 | } |
5658 | ||
5659 | error: | |
5660 | return ret; | |
5661 | } | |
5662 | ||
5663 | /* | |
e6142f2e | 5664 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5665 | * session daemon. |
d6f42150 | 5666 | */ |
e6142f2e | 5667 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5668 | { |
5669 | int ret; | |
e6142f2e | 5670 | char *path = NULL; |
d6f42150 | 5671 | |
6c71277b | 5672 | switch (consumer_data->type) { |
7753dea8 | 5673 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5674 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5675 | break; |
5676 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5677 | path = config.consumerd64_path.value; |
7753dea8 MD |
5678 | break; |
5679 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5680 | path = config.consumerd32_path.value; |
7753dea8 MD |
5681 | break; |
5682 | default: | |
5683 | ERR("Consumer type unknown"); | |
5684 | ret = -EINVAL; | |
5685 | goto error; | |
d6f42150 | 5686 | } |
e6142f2e | 5687 | assert(path); |
d6f42150 | 5688 | |
67e40797 DG |
5689 | DBG2("Creating consumer directory: %s", path); |
5690 | ||
6c71277b | 5691 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5692 | if (ret < 0 && errno != EEXIST) { |
5693 | PERROR("mkdir"); | |
5694 | ERR("Failed to create %s", path); | |
5695 | goto error; | |
d6f42150 | 5696 | } |
6c71277b | 5697 | if (is_root) { |
e6142f2e | 5698 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5699 | if (ret < 0) { |
5700 | ERR("Unable to set group on %s", path); | |
5701 | PERROR("chown"); | |
5702 | goto error; | |
5703 | } | |
5704 | } | |
d6f42150 | 5705 | |
e6142f2e | 5706 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5707 | consumer_data->err_sock = |
5708 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5709 | if (consumer_data->err_sock < 0) { | |
5710 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5711 | ret = -1; |
5712 | goto error; | |
5713 | } | |
5714 | ||
a24f05ab MD |
5715 | /* |
5716 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5717 | * show must go on. | |
5718 | */ | |
5719 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5720 | if (ret < 0) { | |
5721 | PERROR("utils_set_fd_cloexec"); | |
5722 | /* continue anyway */ | |
5723 | } | |
5724 | ||
d6f42150 | 5725 | /* File permission MUST be 660 */ |
3bd1e081 | 5726 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5727 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5728 | if (ret < 0) { |
3bd1e081 | 5729 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5730 | PERROR("chmod"); |
d6f42150 DG |
5731 | goto error; |
5732 | } | |
5733 | ||
5734 | error: | |
5735 | return ret; | |
5736 | } | |
5737 | ||
fac6795d | 5738 | /* |
d063d709 | 5739 | * Signal handler for the daemon |
cf3af59e | 5740 | * |
54d01ffb DG |
5741 | * Simply stop all worker threads, leaving main() return gracefully after |
5742 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5743 | */ |
5744 | static void sighandler(int sig) | |
5745 | { | |
5746 | switch (sig) { | |
cf3af59e | 5747 | case SIGINT: |
af87c45a | 5748 | DBG("SIGINT caught"); |
cf3af59e MD |
5749 | stop_threads(); |
5750 | break; | |
5751 | case SIGTERM: | |
af87c45a | 5752 | DBG("SIGTERM caught"); |
cf3af59e MD |
5753 | stop_threads(); |
5754 | break; | |
0bb7724a DG |
5755 | case SIGUSR1: |
5756 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5757 | break; | |
cf3af59e MD |
5758 | default: |
5759 | break; | |
fac6795d | 5760 | } |
fac6795d DG |
5761 | } |
5762 | ||
5763 | /* | |
d063d709 | 5764 | * Setup signal handler for : |
1d4b027a | 5765 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5766 | */ |
1d4b027a | 5767 | static int set_signal_handler(void) |
fac6795d | 5768 | { |
1d4b027a DG |
5769 | int ret = 0; |
5770 | struct sigaction sa; | |
5771 | sigset_t sigset; | |
fac6795d | 5772 | |
1d4b027a | 5773 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5774 | PERROR("sigemptyset"); |
1d4b027a DG |
5775 | return ret; |
5776 | } | |
d6f42150 | 5777 | |
1d4b027a DG |
5778 | sa.sa_mask = sigset; |
5779 | sa.sa_flags = 0; | |
0072e5e2 MD |
5780 | |
5781 | sa.sa_handler = sighandler; | |
1d4b027a | 5782 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5783 | PERROR("sigaction"); |
1d4b027a | 5784 | return ret; |
d6f42150 DG |
5785 | } |
5786 | ||
1d4b027a | 5787 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5788 | PERROR("sigaction"); |
1d4b027a | 5789 | return ret; |
d6f42150 | 5790 | } |
aaf26714 | 5791 | |
0072e5e2 | 5792 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5793 | PERROR("sigaction"); |
1d4b027a | 5794 | return ret; |
8c0faa1d DG |
5795 | } |
5796 | ||
0072e5e2 MD |
5797 | sa.sa_handler = SIG_IGN; |
5798 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5799 | PERROR("sigaction"); |
5800 | return ret; | |
5801 | } | |
5802 | ||
5803 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5804 | |
5805 | return ret; | |
fac6795d DG |
5806 | } |
5807 | ||
f3ed775e | 5808 | /* |
d063d709 | 5809 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5810 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5811 | */ |
5812 | static void set_ulimit(void) | |
5813 | { | |
5814 | int ret; | |
5815 | struct rlimit lim; | |
5816 | ||
514bb9f0 | 5817 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5818 | lim.rlim_cur = 65535; |
5819 | lim.rlim_max = 65535; | |
5820 | ||
5821 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5822 | if (ret < 0) { | |
76d7553f | 5823 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5824 | } |
5825 | } | |
5826 | ||
4a15001e | 5827 | static int write_pidfile(void) |
35f90c40 | 5828 | { |
e6142f2e | 5829 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5830 | } |
5831 | ||
e6142f2e JG |
5832 | static int set_clock_plugin_env(void) |
5833 | { | |
5834 | int ret = 0; | |
5835 | char *env_value = NULL; | |
cd9290dd | 5836 | |
e6142f2e JG |
5837 | if (!config.lttng_ust_clock_plugin.value) { |
5838 | goto end; | |
5839 | } | |
5840 | ||
5841 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5842 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5843 | if (ret < 0) { |
e6142f2e JG |
5844 | PERROR("asprintf"); |
5845 | goto end; | |
cd9290dd DG |
5846 | } |
5847 | ||
e6142f2e JG |
5848 | ret = putenv(env_value); |
5849 | if (ret) { | |
5850 | free(env_value); | |
5851 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5852 | goto end; | |
5853 | } | |
cd9290dd | 5854 | |
e6142f2e JG |
5855 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5856 | config.lttng_ust_clock_plugin.value); | |
5857 | end: | |
4a15001e | 5858 | return ret; |
ef367a93 JG |
5859 | } |
5860 | ||
d086f507 JD |
5861 | static |
5862 | struct rotation_thread_timer_queue *create_rotate_timer_queue(void) | |
5863 | { | |
5864 | struct rotation_thread_timer_queue *queue = NULL; | |
5865 | ||
5866 | queue = zmalloc(sizeof(struct rotation_thread_timer_queue)); | |
5867 | if (!queue) { | |
5868 | PERROR("Failed to allocate timer rotate queue"); | |
5869 | goto end; | |
5870 | } | |
5871 | ||
5872 | queue->event_pipe = lttng_pipe_open(FD_CLOEXEC | O_NONBLOCK); | |
5873 | CDS_INIT_LIST_HEAD(&queue->list); | |
5874 | pthread_mutex_init(&queue->lock, NULL); | |
5875 | ||
5876 | end: | |
5877 | return queue; | |
5878 | } | |
5879 | ||
5880 | static | |
5881 | void destroy_rotate_timer_queue(struct rotation_thread_timer_queue *queue) | |
5882 | { | |
5883 | struct sessiond_rotation_timer *node, *tmp_node; | |
5884 | ||
5885 | if (!queue) { | |
5886 | return; | |
5887 | } | |
5888 | ||
5889 | lttng_pipe_destroy(queue->event_pipe); | |
5890 | ||
5891 | pthread_mutex_lock(&queue->lock); | |
5892 | /* Empty wait queue. */ | |
5893 | cds_list_for_each_entry_safe(node, tmp_node, &queue->list, head) { | |
5894 | cds_list_del(&node->head); | |
5895 | free(node); | |
5896 | } | |
5897 | pthread_mutex_unlock(&queue->lock); | |
5898 | ||
5899 | pthread_mutex_destroy(&queue->lock); | |
5900 | free(queue); | |
5901 | } | |
5902 | ||
fac6795d DG |
5903 | /* |
5904 | * main | |
5905 | */ | |
5906 | int main(int argc, char **argv) | |
5907 | { | |
4a15001e | 5908 | int ret = 0, retval = 0; |
fac6795d | 5909 | void *status; |
e6142f2e | 5910 | const char *env_app_timeout; |
b3530820 JG |
5911 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5912 | *ust64_channel_monitor_pipe = NULL, | |
5913 | *kernel_channel_monitor_pipe = NULL; | |
99611076 JG |
5914 | bool notification_thread_launched = false; |
5915 | bool rotation_thread_launched = false; | |
5916 | bool timer_thread_launched = false; | |
62c43103 JD |
5917 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5918 | *ust64_channel_rotate_pipe = NULL, | |
5919 | *kernel_channel_rotate_pipe = NULL; | |
d086f507 JD |
5920 | struct timer_thread_parameters timer_thread_ctx; |
5921 | /* Queue of rotation jobs populated by the sessiond-timer. */ | |
5922 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
90936dcf | 5923 | sem_t notification_thread_ready; |
fac6795d | 5924 | |
335a95b7 MD |
5925 | init_kernel_workarounds(); |
5926 | ||
f6a9efaa DG |
5927 | rcu_register_thread(); |
5928 | ||
4a15001e MD |
5929 | if (set_signal_handler()) { |
5930 | retval = -1; | |
5931 | goto exit_set_signal_handler; | |
0bb7724a DG |
5932 | } |
5933 | ||
d086f507 JD |
5934 | if (sessiond_timer_signal_init()) { |
5935 | retval = -1; | |
5936 | goto exit_set_signal_handler; | |
5937 | } | |
5938 | ||
12744796 DG |
5939 | page_size = sysconf(_SC_PAGESIZE); |
5940 | if (page_size < 0) { | |
5941 | PERROR("sysconf _SC_PAGESIZE"); | |
5942 | page_size = LONG_MAX; | |
5943 | WARN("Fallback page size to %ld", page_size); | |
5944 | } | |
5945 | ||
e6142f2e JG |
5946 | ret = sessiond_config_init(&config); |
5947 | if (ret) { | |
5948 | retval = -1; | |
5949 | goto exit_set_signal_handler; | |
5950 | } | |
5951 | ||
2788b494 JR |
5952 | /* |
5953 | * Init config from environment variables. | |
5954 | * Command line option override env configuration per-doc. Do env first. | |
5955 | */ | |
5956 | sessiond_config_apply_env_config(&config); | |
5957 | ||
4a15001e MD |
5958 | /* |
5959 | * Parse arguments and load the daemon configuration file. | |
5960 | * | |
5961 | * We have an exit_options exit path to free memory reserved by | |
5962 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5963 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5964 | * depends on set_options. | |
5965 | */ | |
fac6795d | 5966 | progname = argv[0]; |
4a15001e MD |
5967 | if (set_options(argc, argv)) { |
5968 | retval = -1; | |
5969 | goto exit_options; | |
fac6795d DG |
5970 | } |
5971 | ||
e6142f2e JG |
5972 | /* |
5973 | * Resolve all paths received as arguments, configuration option, or | |
5974 | * through environment variable as absolute paths. This is necessary | |
5975 | * since daemonizing causes the sessiond's current working directory | |
5976 | * to '/'. | |
5977 | */ | |
5978 | ret = sessiond_config_resolve_paths(&config); | |
5979 | if (ret) { | |
5980 | goto exit_options; | |
5981 | } | |
5982 | ||
5983 | /* Apply config. */ | |
5984 | lttng_opt_verbose = config.verbose; | |
5985 | lttng_opt_quiet = config.quiet; | |
5986 | kconsumer_data.err_unix_sock_path = | |
5987 | config.kconsumerd_err_unix_sock_path.value; | |
5988 | kconsumer_data.cmd_unix_sock_path = | |
5989 | config.kconsumerd_cmd_unix_sock_path.value; | |
5990 | ustconsumer32_data.err_unix_sock_path = | |
5991 | config.consumerd32_err_unix_sock_path.value; | |
5992 | ustconsumer32_data.cmd_unix_sock_path = | |
5993 | config.consumerd32_cmd_unix_sock_path.value; | |
5994 | ustconsumer64_data.err_unix_sock_path = | |
5995 | config.consumerd64_err_unix_sock_path.value; | |
5996 | ustconsumer64_data.cmd_unix_sock_path = | |
5997 | config.consumerd64_cmd_unix_sock_path.value; | |
5998 | set_clock_plugin_env(); | |
5999 | ||
6000 | sessiond_config_log(&config); | |
6001 | ||
f472090a JG |
6002 | if (create_lttng_rundir()) { |
6003 | retval = -1; | |
6004 | goto exit_options; | |
6005 | } | |
6006 | ||
6007 | /* Abort launch if a session daemon is already running. */ | |
6008 | if (check_existing_daemon()) { | |
6009 | ERR("A session daemon is already running."); | |
6010 | retval = -1; | |
6011 | goto exit_options; | |
6012 | } | |
6013 | ||
fac6795d | 6014 | /* Daemonize */ |
e6142f2e | 6015 | if (config.daemonize || config.background) { |
ceed52b5 MD |
6016 | int i; |
6017 | ||
72dd7491 | 6018 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 6019 | !config.background); |
53094c05 | 6020 | if (ret < 0) { |
4a15001e MD |
6021 | retval = -1; |
6022 | goto exit_options; | |
53094c05 | 6023 | } |
0bb7724a | 6024 | |
ceed52b5 | 6025 | /* |
0bb7724a | 6026 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 6027 | * closed, in case we are called with more opened file |
f472090a | 6028 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
6029 | */ |
6030 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
6031 | if (i == lockfile_fd) { |
6032 | continue; | |
6033 | } | |
ceed52b5 MD |
6034 | (void) close(i); |
6035 | } | |
6036 | } | |
6037 | ||
7567352f MD |
6038 | if (run_as_create_worker(argv[0]) < 0) { |
6039 | goto exit_create_run_as_worker_cleanup; | |
6040 | } | |
6041 | ||
4a15001e MD |
6042 | /* |
6043 | * Starting from here, we can create threads. This needs to be after | |
6044 | * lttng_daemonize due to RCU. | |
6045 | */ | |
6046 | ||
6047 | /* | |
6048 | * Initialize the health check subsystem. This call should set the | |
6049 | * appropriate time values. | |
6050 | */ | |
6051 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
6052 | if (!health_sessiond) { | |
6053 | PERROR("health_app_create error"); | |
6054 | retval = -1; | |
6055 | goto exit_health_sessiond_cleanup; | |
6056 | } | |
6057 | ||
4a15001e | 6058 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 6059 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
6060 | retval = -1; |
6061 | goto exit_ht_cleanup; | |
6062 | } | |
6063 | ||
ceed52b5 | 6064 | /* Create thread quit pipe */ |
4a15001e MD |
6065 | if (init_thread_quit_pipe()) { |
6066 | retval = -1; | |
6067 | goto exit_init_data; | |
fac6795d DG |
6068 | } |
6069 | ||
6070 | /* Check if daemon is UID = 0 */ | |
6071 | is_root = !getuid(); | |
fac6795d | 6072 | if (is_root) { |
67e40797 | 6073 | /* Create global run dir with root access */ |
67e40797 | 6074 | |
b3530820 JG |
6075 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
6076 | if (!kernel_channel_monitor_pipe) { | |
6077 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
6078 | retval = -1; | |
6079 | goto exit_init_data; | |
6080 | } | |
6081 | kconsumer_data.channel_monitor_pipe = | |
6082 | lttng_pipe_release_writefd( | |
6083 | kernel_channel_monitor_pipe); | |
6084 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
6085 | retval = -1; | |
6086 | goto exit_init_data; | |
6087 | } | |
62c43103 JD |
6088 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
6089 | if (!kernel_channel_rotate_pipe) { | |
6090 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
6091 | retval = -1; | |
6092 | goto exit_init_data; | |
6093 | } | |
6094 | kconsumer_data.channel_rotate_pipe = | |
6095 | lttng_pipe_release_writefd( | |
6096 | kernel_channel_rotate_pipe); | |
6097 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
6098 | retval = -1; | |
6099 | goto exit_init_data; | |
6100 | } | |
fac6795d DG |
6101 | } |
6102 | ||
5c827ce0 DG |
6103 | /* Set consumer initial state */ |
6104 | kernel_consumerd_state = CONSUMER_STOPPED; | |
6105 | ust_consumerd_state = CONSUMER_STOPPED; | |
6106 | ||
b3530820 JG |
6107 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
6108 | if (!ust32_channel_monitor_pipe) { | |
6109 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
6110 | retval = -1; | |
6111 | goto exit_init_data; | |
6112 | } | |
6113 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6114 | ust32_channel_monitor_pipe); | |
6115 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
6116 | retval = -1; | |
6117 | goto exit_init_data; | |
6118 | } | |
62c43103 JD |
6119 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
6120 | if (!ust32_channel_rotate_pipe) { | |
6121 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
6122 | retval = -1; | |
6123 | goto exit_init_data; | |
6124 | } | |
6125 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6126 | ust32_channel_rotate_pipe); | |
6127 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
6128 | retval = -1; | |
6129 | goto exit_init_data; | |
6130 | } | |
6131 | ||
d086f507 JD |
6132 | /* |
6133 | * The rotation_timer_queue structure is shared between the sessiond timer | |
6134 | * thread and the rotation thread. The main() keeps the ownership and | |
6135 | * destroys it when both threads have quit. | |
6136 | */ | |
6137 | rotation_timer_queue = create_rotate_timer_queue(); | |
6138 | if (!rotation_timer_queue) { | |
6139 | retval = -1; | |
6140 | goto exit_init_data; | |
6141 | } | |
6142 | timer_thread_ctx.rotation_timer_queue = rotation_timer_queue; | |
67e40797 | 6143 | |
b3530820 JG |
6144 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
6145 | if (!ust64_channel_monitor_pipe) { | |
6146 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
6147 | retval = -1; | |
6148 | goto exit_init_data; | |
6149 | } | |
6150 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6151 | ust64_channel_monitor_pipe); | |
6152 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
6153 | retval = -1; | |
6154 | goto exit_init_data; | |
6155 | } | |
62c43103 JD |
6156 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
6157 | if (!ust64_channel_rotate_pipe) { | |
6158 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
6159 | retval = -1; | |
6160 | goto exit_init_data; | |
6161 | } | |
6162 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6163 | ust64_channel_rotate_pipe); | |
6164 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
6165 | retval = -1; | |
6166 | goto exit_init_data; | |
6167 | } | |
847177cd | 6168 | |
1427f9b2 DG |
6169 | /* |
6170 | * Init UST app hash table. Alloc hash table before this point since | |
6171 | * cleanup() can get called after that point. | |
6172 | */ | |
4a15001e | 6173 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 6174 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
6175 | retval = -1; |
6176 | goto exit_init_data; | |
6177 | } | |
1427f9b2 | 6178 | |
6a4e4039 JG |
6179 | /* |
6180 | * Initialize agent app hash table. We allocate the hash table here | |
6181 | * since cleanup() can get called after this point. | |
6182 | */ | |
6183 | if (agent_app_ht_alloc()) { | |
6184 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
6185 | retval = -1; |
6186 | goto exit_init_data; | |
f20baf8e DG |
6187 | } |
6188 | ||
a88df331 DG |
6189 | /* |
6190 | * These actions must be executed as root. We do that *after* setting up | |
6191 | * the sockets path because we MUST make the check for another daemon using | |
6192 | * those paths *before* trying to set the kernel consumer sockets and init | |
6193 | * kernel tracer. | |
6194 | */ | |
6195 | if (is_root) { | |
e6142f2e | 6196 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
6197 | retval = -1; |
6198 | goto exit_init_data; | |
7753dea8 MD |
6199 | } |
6200 | ||
a88df331 | 6201 | /* Setup kernel tracer */ |
e6142f2e | 6202 | if (!config.no_kernel) { |
4fba7219 | 6203 | init_kernel_tracer(); |
89588270 DG |
6204 | if (kernel_tracer_fd >= 0) { |
6205 | ret = syscall_init_table(); | |
6206 | if (ret < 0) { | |
4a15001e MD |
6207 | ERR("Unable to populate syscall table. " |
6208 | "Syscall tracing won't work " | |
6209 | "for this session daemon."); | |
89588270 | 6210 | } |
834978fd | 6211 | } |
4fba7219 | 6212 | } |
a88df331 DG |
6213 | |
6214 | /* Set ulimit for open files */ | |
6215 | set_ulimit(); | |
fac6795d | 6216 | } |
4063050c MD |
6217 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6218 | lttng_fd_init(); | |
fac6795d | 6219 | |
e6142f2e | 6220 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
6221 | retval = -1; |
6222 | goto exit_init_data; | |
67e40797 DG |
6223 | } |
6224 | ||
e6142f2e | 6225 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
6226 | retval = -1; |
6227 | goto exit_init_data; | |
67e40797 DG |
6228 | } |
6229 | ||
d6f42150 | 6230 | /* Setup the needed unix socket */ |
4a15001e MD |
6231 | if (init_daemon_socket()) { |
6232 | retval = -1; | |
6233 | goto exit_init_data; | |
fac6795d DG |
6234 | } |
6235 | ||
6236 | /* Set credentials to socket */ | |
e6142f2e | 6237 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
6238 | retval = -1; |
6239 | goto exit_init_data; | |
fac6795d DG |
6240 | } |
6241 | ||
5b8719f5 | 6242 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 6243 | if (config.sig_parent) { |
5b8719f5 DG |
6244 | ppid = getppid(); |
6245 | } | |
6246 | ||
7a485870 | 6247 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 6248 | if (is_root && !config.no_kernel) { |
4a15001e MD |
6249 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
6250 | retval = -1; | |
6251 | goto exit_init_data; | |
6620da75 | 6252 | } |
7a485870 DG |
6253 | } |
6254 | ||
099e26bd | 6255 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
6256 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
6257 | retval = -1; | |
6258 | goto exit_init_data; | |
099e26bd DG |
6259 | } |
6260 | ||
d0b96690 | 6261 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6262 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6263 | retval = -1; | |
6264 | goto exit_init_data; | |
d0b96690 DG |
6265 | } |
6266 | ||
7972aab2 DG |
6267 | /* Initialize global buffer per UID and PID registry. */ |
6268 | buffer_reg_init_uid_registry(); | |
6269 | buffer_reg_init_pid_registry(); | |
6270 | ||
099e26bd | 6271 | /* Init UST command queue. */ |
8bdee6e2 | 6272 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6273 | |
273ea72c | 6274 | /* |
4a15001e MD |
6275 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6276 | * is statically declared in session.c | |
273ea72c | 6277 | */ |
54d01ffb | 6278 | session_list_ptr = session_get_list(); |
b5541356 | 6279 | |
2f77fc4b | 6280 | cmd_init(); |
00e2e675 | 6281 | |
ae9e45b3 DG |
6282 | /* Check for the application socket timeout env variable. */ |
6283 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6284 | if (env_app_timeout) { | |
e6142f2e | 6285 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 6286 | } else { |
e6142f2e | 6287 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
6288 | } |
6289 | ||
4a15001e MD |
6290 | ret = write_pidfile(); |
6291 | if (ret) { | |
6292 | ERR("Error in write_pidfile"); | |
6293 | retval = -1; | |
6294 | goto exit_init_data; | |
6295 | } | |
35f90c40 | 6296 | |
554831e7 MD |
6297 | /* Initialize communication library */ |
6298 | lttcomm_init(); | |
4a15001e | 6299 | /* Initialize TCP timeout values */ |
d831c249 | 6300 | lttcomm_inet_init(); |
554831e7 | 6301 | |
ef367a93 | 6302 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6303 | retval = -1; |
6304 | goto exit_init_data; | |
ef367a93 | 6305 | } |
e6142f2e | 6306 | load_info->path = config.load_session_path.value; |
ef367a93 | 6307 | |
12b4fb37 | 6308 | /* Create health-check thread. */ |
1a1a34b4 | 6309 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 6310 | thread_manage_health, (void *) NULL); |
4a15001e MD |
6311 | if (ret) { |
6312 | errno = ret; | |
44a5e5eb | 6313 | PERROR("pthread_create health"); |
4a15001e | 6314 | retval = -1; |
44a5e5eb DG |
6315 | goto exit_health; |
6316 | } | |
6317 | ||
90936dcf JD |
6318 | /* |
6319 | * The rotation thread needs the notification thread to be ready before | |
6320 | * creating the rotate_notification_channel, so we use this semaphore as | |
6321 | * a rendez-vous point. | |
6322 | */ | |
6323 | sem_init(¬ification_thread_ready, 0, 0); | |
6324 | ||
b3530820 JG |
6325 | /* notification_thread_data acquires the pipes' read side. */ |
6326 | notification_thread_handle = notification_thread_handle_create( | |
6327 | ust32_channel_monitor_pipe, | |
6328 | ust64_channel_monitor_pipe, | |
90936dcf JD |
6329 | kernel_channel_monitor_pipe, |
6330 | ¬ification_thread_ready); | |
b3530820 JG |
6331 | if (!notification_thread_handle) { |
6332 | retval = -1; | |
6333 | ERR("Failed to create notification thread shared data"); | |
6334 | stop_threads(); | |
6335 | goto exit_notification; | |
6336 | } | |
6337 | ||
6338 | /* Create notification thread. */ | |
6339 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6340 | thread_notification, notification_thread_handle); | |
6341 | if (ret) { | |
6342 | errno = ret; | |
6343 | PERROR("pthread_create notification"); | |
6344 | retval = -1; | |
6345 | stop_threads(); | |
6346 | goto exit_notification; | |
6347 | } | |
99611076 | 6348 | notification_thread_launched = true; |
b3530820 | 6349 | |
d086f507 JD |
6350 | /* Create timer thread. */ |
6351 | ret = pthread_create(&timer_thread, default_pthread_attr(), | |
6352 | sessiond_timer_thread, &timer_thread_ctx); | |
6353 | if (ret) { | |
6354 | errno = ret; | |
6355 | PERROR("pthread_create timer"); | |
6356 | retval = -1; | |
6357 | stop_threads(); | |
6358 | goto exit_notification; | |
6359 | } | |
99611076 | 6360 | timer_thread_launched = true; |
d086f507 | 6361 | |
db66e574 JD |
6362 | /* rotation_thread_data acquires the pipes' read side. */ |
6363 | rotation_thread_handle = rotation_thread_handle_create( | |
6364 | ust32_channel_rotate_pipe, | |
6365 | ust64_channel_rotate_pipe, | |
6366 | kernel_channel_rotate_pipe, | |
d086f507 | 6367 | thread_quit_pipe[0], |
90936dcf JD |
6368 | rotation_timer_queue, |
6369 | notification_thread_handle, | |
6370 | ¬ification_thread_ready); | |
db66e574 JD |
6371 | if (!rotation_thread_handle) { |
6372 | retval = -1; | |
6373 | ERR("Failed to create rotation thread shared data"); | |
6374 | stop_threads(); | |
6375 | goto exit_rotation; | |
6376 | } | |
db66e574 JD |
6377 | |
6378 | /* Create rotation thread. */ | |
6379 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
6380 | thread_rotation, rotation_thread_handle); | |
6381 | if (ret) { | |
6382 | errno = ret; | |
6383 | PERROR("pthread_create rotation"); | |
6384 | retval = -1; | |
6385 | stop_threads(); | |
6386 | goto exit_rotation; | |
6387 | } | |
99611076 | 6388 | rotation_thread_launched = true; |
db66e574 | 6389 | |
cf3af59e | 6390 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6391 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6392 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6393 | if (ret) { |
6394 | errno = ret; | |
76d7553f | 6395 | PERROR("pthread_create clients"); |
4a15001e | 6396 | retval = -1; |
b3530820 | 6397 | stop_threads(); |
cf3af59e MD |
6398 | goto exit_client; |
6399 | } | |
fac6795d | 6400 | |
099e26bd | 6401 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6402 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6403 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6404 | if (ret) { |
6405 | errno = ret; | |
76d7553f | 6406 | PERROR("pthread_create dispatch"); |
4a15001e | 6407 | retval = -1; |
b3530820 | 6408 | stop_threads(); |
099e26bd DG |
6409 | goto exit_dispatch; |
6410 | } | |
6411 | ||
6412 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6413 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6414 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6415 | if (ret) { |
6416 | errno = ret; | |
76d7553f | 6417 | PERROR("pthread_create registration"); |
4a15001e | 6418 | retval = -1; |
b3530820 | 6419 | stop_threads(); |
099e26bd DG |
6420 | goto exit_reg_apps; |
6421 | } | |
6422 | ||
cf3af59e | 6423 | /* Create thread to manage application socket */ |
1a1a34b4 | 6424 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6425 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6426 | if (ret) { |
6427 | errno = ret; | |
d0b96690 | 6428 | PERROR("pthread_create apps"); |
4a15001e | 6429 | retval = -1; |
b3530820 | 6430 | stop_threads(); |
d0b96690 DG |
6431 | goto exit_apps; |
6432 | } | |
6433 | ||
6434 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6435 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6436 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6437 | if (ret) { |
6438 | errno = ret; | |
f5c32ef1 | 6439 | PERROR("pthread_create notify"); |
4a15001e | 6440 | retval = -1; |
b3530820 | 6441 | stop_threads(); |
9563b0ad | 6442 | goto exit_apps_notify; |
cf3af59e | 6443 | } |
fac6795d | 6444 | |
022d91ba | 6445 | /* Create agent registration thread. */ |
1a1a34b4 | 6446 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6447 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6448 | if (ret) { |
6449 | errno = ret; | |
022d91ba | 6450 | PERROR("pthread_create agent"); |
4a15001e | 6451 | retval = -1; |
b3530820 | 6452 | stop_threads(); |
022d91ba | 6453 | goto exit_agent_reg; |
4d076222 DG |
6454 | } |
6455 | ||
6620da75 | 6456 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 6457 | if (is_root && !config.no_kernel) { |
6620da75 | 6458 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 6459 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6460 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6461 | if (ret) { |
6462 | errno = ret; | |
6620da75 | 6463 | PERROR("pthread_create kernel"); |
4a15001e | 6464 | retval = -1; |
b3530820 | 6465 | stop_threads(); |
6620da75 DG |
6466 | goto exit_kernel; |
6467 | } | |
ef367a93 | 6468 | } |
7a485870 | 6469 | |
4a15001e | 6470 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6471 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6472 | thread_load_session, load_info); | |
4a15001e MD |
6473 | if (ret) { |
6474 | errno = ret; | |
6475 | PERROR("pthread_create load_session_thread"); | |
6476 | retval = -1; | |
b3530820 | 6477 | stop_threads(); |
4a15001e MD |
6478 | goto exit_load_session; |
6479 | } | |
6480 | ||
6481 | /* | |
6482 | * This is where we start awaiting program completion (e.g. through | |
6483 | * signal that asks threads to teardown). | |
6484 | */ | |
6485 | ||
6486 | ret = pthread_join(load_session_thread, &status); | |
6487 | if (ret) { | |
6488 | errno = ret; | |
6489 | PERROR("pthread_join load_session_thread"); | |
6490 | retval = -1; | |
6491 | } | |
6492 | exit_load_session: | |
ef367a93 | 6493 | |
e6142f2e | 6494 | if (is_root && !config.no_kernel) { |
6620da75 | 6495 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6496 | if (ret) { |
6497 | errno = ret; | |
6620da75 | 6498 | PERROR("pthread_join"); |
4a15001e | 6499 | retval = -1; |
6620da75 | 6500 | } |
fac6795d | 6501 | } |
cf3af59e | 6502 | exit_kernel: |
4a15001e | 6503 | |
022d91ba | 6504 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6505 | if (ret) { |
6506 | errno = ret; | |
022d91ba | 6507 | PERROR("pthread_join agent"); |
4a15001e | 6508 | retval = -1; |
4d076222 | 6509 | } |
022d91ba | 6510 | exit_agent_reg: |
4a15001e | 6511 | |
9563b0ad | 6512 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6513 | if (ret) { |
6514 | errno = ret; | |
9563b0ad | 6515 | PERROR("pthread_join apps notify"); |
4a15001e | 6516 | retval = -1; |
9563b0ad | 6517 | } |
9563b0ad | 6518 | exit_apps_notify: |
4a15001e | 6519 | |
cf3af59e | 6520 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6521 | if (ret) { |
6522 | errno = ret; | |
9563b0ad | 6523 | PERROR("pthread_join apps"); |
4a15001e | 6524 | retval = -1; |
cf3af59e | 6525 | } |
cf3af59e | 6526 | exit_apps: |
4a15001e | 6527 | |
099e26bd | 6528 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6529 | if (ret) { |
6530 | errno = ret; | |
76d7553f | 6531 | PERROR("pthread_join"); |
4a15001e | 6532 | retval = -1; |
099e26bd | 6533 | } |
099e26bd | 6534 | exit_reg_apps: |
4a15001e | 6535 | |
772b8f4d MD |
6536 | /* |
6537 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6538 | * we don't leak applications in the queue. | |
6539 | */ | |
099e26bd | 6540 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6541 | if (ret) { |
6542 | errno = ret; | |
76d7553f | 6543 | PERROR("pthread_join"); |
4a15001e | 6544 | retval = -1; |
099e26bd | 6545 | } |
099e26bd | 6546 | exit_dispatch: |
4a15001e | 6547 | |
cf3af59e | 6548 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6549 | if (ret) { |
6550 | errno = ret; | |
76d7553f | 6551 | PERROR("pthread_join"); |
4a15001e | 6552 | retval = -1; |
cf3af59e | 6553 | } |
a88df331 | 6554 | |
b3530820 | 6555 | exit_client: |
db66e574 | 6556 | exit_rotation: |
b3530820 | 6557 | exit_notification: |
90936dcf | 6558 | sem_destroy(¬ification_thread_ready); |
4a15001e MD |
6559 | ret = pthread_join(health_thread, &status); |
6560 | if (ret) { | |
6561 | errno = ret; | |
6562 | PERROR("pthread_join health thread"); | |
6563 | retval = -1; | |
06f525de DG |
6564 | } |
6565 | ||
b3530820 | 6566 | exit_health: |
4a15001e | 6567 | exit_init_data: |
4d62fbf8 MD |
6568 | /* |
6569 | * Wait for all pending call_rcu work to complete before tearing | |
6570 | * down data structures. call_rcu worker may be trying to | |
6571 | * perform lookups in those structures. | |
6572 | */ | |
6573 | rcu_barrier(); | |
4a15001e MD |
6574 | /* |
6575 | * sessiond_cleanup() is called when no other thread is running, except | |
6576 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6577 | */ | |
6578 | rcu_thread_online(); | |
6579 | sessiond_cleanup(); | |
06f525de | 6580 | |
c4d5de9d JG |
6581 | /* |
6582 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6583 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6584 | * the queue is empty before shutting down the clean-up thread. | |
6585 | */ | |
6586 | rcu_barrier(); | |
6587 | ||
b3530820 JG |
6588 | /* |
6589 | * The teardown of the notification system is performed after the | |
6590 | * session daemon's teardown in order to allow it to be notified | |
6591 | * of the active session and channels at the moment of the teardown. | |
6592 | */ | |
6593 | if (notification_thread_handle) { | |
99611076 | 6594 | if (notification_thread_launched) { |
6be1a386 JG |
6595 | notification_thread_command_quit( |
6596 | notification_thread_handle); | |
6597 | ret = pthread_join(notification_thread, &status); | |
6598 | if (ret) { | |
6599 | errno = ret; | |
6600 | PERROR("pthread_join notification thread"); | |
6601 | retval = -1; | |
6602 | } | |
3dec304b | 6603 | } |
6be1a386 | 6604 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6605 | } |
6606 | ||
db66e574 | 6607 | if (rotation_thread_handle) { |
99611076 | 6608 | if (rotation_thread_launched) { |
db66e574 JD |
6609 | ret = pthread_join(rotation_thread, &status); |
6610 | if (ret) { | |
6611 | errno = ret; | |
6612 | PERROR("pthread_join rotation thread"); | |
6613 | retval = -1; | |
6614 | } | |
6615 | } | |
6616 | rotation_thread_handle_destroy(rotation_thread_handle); | |
6617 | } | |
6618 | ||
99611076 | 6619 | if (timer_thread_launched) { |
d086f507 JD |
6620 | kill(getpid(), LTTNG_SESSIOND_SIG_EXIT); |
6621 | ret = pthread_join(timer_thread, &status); | |
6622 | if (ret) { | |
6623 | errno = ret; | |
6624 | PERROR("pthread_join timer thread"); | |
6625 | retval = -1; | |
6626 | } | |
6627 | } | |
6628 | ||
6629 | /* | |
6630 | * After the rotation and timer thread have quit, we can safely destroy | |
6631 | * the rotation_timer_queue. | |
6632 | */ | |
6633 | destroy_rotate_timer_queue(rotation_timer_queue); | |
6634 | ||
b3530820 JG |
6635 | rcu_thread_offline(); |
6636 | rcu_unregister_thread(); | |
6637 | ||
5e97de00 | 6638 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6639 | if (ret) { |
4a15001e | 6640 | retval = -1; |
0b2dc8df | 6641 | } |
b3530820 JG |
6642 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6643 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6644 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
62c43103 JD |
6645 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6646 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6647 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6648 | exit_ht_cleanup: |
4a15001e | 6649 | |
4a15001e MD |
6650 | health_app_destroy(health_sessiond); |
6651 | exit_health_sessiond_cleanup: | |
7567352f | 6652 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6653 | |
6654 | exit_options: | |
f472090a | 6655 | sessiond_cleanup_lock_file(); |
4a15001e MD |
6656 | sessiond_cleanup_options(); |
6657 | ||
6658 | exit_set_signal_handler: | |
6659 | if (!retval) { | |
cf3af59e | 6660 | exit(EXIT_SUCCESS); |
4a15001e MD |
6661 | } else { |
6662 | exit(EXIT_FAILURE); | |
67e40797 | 6663 | } |
fac6795d | 6664 | } |